深海游弋的鱼 – 默默的点滴

macOS Big Sur(11.4)编译vuelidate 2.x适配Vue 3.x

目前，vuelidate 2.x暂时还没发布正式版本，而如果需要适配Vue 3.x，则需要自己编译，编译过程如下：

$ brew install npm

$ brew install yarn

$ npm install bili -g

$ git clone https://github.com/vuelidate/vuelidate.git
# 如果需要编译umd版本，目前需要使用下面的仓库
# git clone https://github.com/wangqiang1588/vuelidate.git

$ cd vuelidate

$ cd packages

$ cd vuelidate

$ npm run build

# 当前目录下的dist/index.umd.js即是目标文件，拷贝出来即可

$ cd ..

$ cd validators

$ npm run build


# 当前目录下的dist/index.umd.js即是目标文件，拷贝出来即可

$ brew install npm

$ brew install yarn

$ npm install bili -g

$ git clone https://github.com/vuelidate/vuelidate.git

# 如果需要编译umd版本，目前需要使用下面的仓库

# git clone https://github.com/wangqiang1588/vuelidate.git

$ cd vuelidate

$ cd packages

$ cd vuelidate

$ npm run build

# 当前目录下的dist/index.umd.js即是目标文件，拷贝出来即可

$ cd ..

$ cd validators

$ npm run build

# 当前目录下的dist/index.umd.js即是目标文件，拷贝出来即可

ABIs [arm64-v8a] are not supported for platform. Supported ABIs are [armeabi-v7a, x86].

最近在macOS Big Sur(11.4)编译Hummer

$ git clone https://github.com/didi/Hummer.git

# 出问题的提交版本 ece6d899da93e83d58ecbe68659d34cafaed8c38
# git checkout ece6d899da93e83d58ecbe68659d34cafaed8c38

$ cd Hummer

$ cd android

$ bash gradlew clean build

$ git clone https://github.com/didi/Hummer.git

# 出问题的提交版本 ece6d899da93e83d58ecbe68659d34cafaed8c38

# git checkout ece6d899da93e83d58ecbe68659d34cafaed8c38

$ cd Hummer

$ cd android

$ bash gradlew clean build

结果报错如下：

* What went wrong:
A problem occurred configuring project ':hummer-core'.
> ABIs [arm64-v8a] are not supported for platform. Supported ABIs are [armeabi-v7a, x86].

* What went wrong:

A problem occurred configuring project ':hummer-core'.

> ABIs [arm64-v8a] are not supported for platform. Supported ABIs are [armeabi-v7a, x86].

原因为默认引入的构建工具版本如下：

classpath 'com.android.tools.build:gradle:3.4.1'

1	classpath 'com.android.tools.build:gradle:3.4.1'

解决方法为升级到：

classpath 'com.android.tools.build:gradle:3.6.4'

1	classpath 'com.android.tools.build:gradle:3.6.4'

注意： 目前测试发现，如果升级到

classpath 'com.android.tools.build:gradle:4.2.1'

1	classpath 'com.android.tools.build:gradle:4.2.1'

不能成功编译。原因为module.gradle的配置没有被正确解析。

移动端 JS 引擎哪家强

在一般的移动端开发场景中，每次更新应用功能都是通过 Native 语言开发并通过应用市场版本分发来实现的。但是市场瞬息万变，Native 语言在开发效率上存在一定不足，并且从APP版本更新到应用市场审核发布再到用户下载更新，总会存在一定的时间差，这样就导致新的功能无法及时覆盖全量用户。

为了解决这个问题，开发者们一般会在项目里引入一门脚本语言，提速APP的研发流程。在移动端应用比较广泛的脚本语言有 Lua和JavaScript，前者在游戏领域用的比较多，后者在应用领域用的比较多。本篇文章主要是想探讨一下移动双端（iOS & Android）的JavaScript引擎选型。由于个人水平有限，文章总会有遗漏和不足的地方，还请各位大佬多多指教。

JS 引擎选型要点

JavaScript作为世界上最热门的脚本语言，有着非常多的引擎实现：有Apple御用的 JavaScriptCore，有性能最强劲的V8，还有最近热度很高的QuickJS......如何从这些JS引擎里选出最适合的？我个人认为要有几个考量：

性能：这个没话说，肯定是越快越好
体积：JS引擎会增加一定的包体积
内存占用：内存占用越少越好
JavaScript 语法支持程度：支持的新语法越多越好
调试的便捷性：是否直接支持debug？还是需要自己编译实现调试工具链
应用市场平台规范：主要是iOS平台，平台禁止应用集成带JIT功能的虚拟机

比较麻烦的是，上面的几个点都不是互相独立的，比如说开启JIT的V8引擎，性能肯定是最好的，但它引擎体积就很大，内存占用也很高；在包体积上很占优势的QuickJS，由于没有JIT加持，和有JIT的引擎比起来平均会有5-10倍的性能差距。

下面我会综合刚刚提到的几个点，并选择了JavaScriptCore，V8，Hermes 和 QuickJS这4个JSVM，说说它们的优点和特点，再谈谈他们的不足。

继续阅读移动端 JS 引擎哪家强

Qussar QScrollArea动态适配View高度

我们在使用Qussar QScrollArea等控件的时候，很多情况下，必须给出一个固定的高度，否则控件的高度会变成 0，导致无法显示出来。如何动态适配View高度呢？参考如下：

<template>
  <q-page>
    . . .
    <q-scroll-area>
      <q-resize-obeserver @resize="updateHeights" />
    <q-scroll-area>
  </q-page>
</template>

<script>
. . . 
export default {
  . . . 
  methods: {
    . . .
    updateHeights(size) {
      // {
      //   width: 20 // width of container (in px)
      //   height: 50 // height of container (in px)
      // }
      //重新计算整个区域的高度，使得滚动区域占满整个父控件的高度
      const sz = this.measureElWrapSize(this.$el);
      this.$el.style.height = sz.height + 'px';
    },
    /**
     * 字符串对象是否不为空
     */
    isNotEmpty: function (s) {
        return (!this.isEmpty(s));
    },
    /**
     * 字符串对象是否为空
     */
    isEmpty: function (s) {
        return (this.isNull(s) || ('' === s));
    },
    /**
     * 对象是否为空
     */
    isNull: function (o) {
        return ((undefined === o) || (null === o));
    },
    /**
     * 对象是否不为空
     */
    isNotNull: function (o) {
        return (!this.isNull(o));
    },
    // 计算对象适配父控件大小,从底层开始向上搜索，直到搜索到受到限制的位置为止，然后反向计算应该得到的宽高
    measureElWrapSize: function (el) {
        const hls = []; //到第一次出现高度限制的父窗口的数组
        const wls = []; //到第一次出现宽度限制的父窗口的数组

        // 向上搜索，直到父控件出现高度限制，否则继续向上搜索
        let p = el.offsetParent;
        let maxH = window.innerHeight;
        while (this.isNotNull(p)) {
            const h = p.style.height;
            if (this.isNotEmpty(h)) {
                maxH = Math.min(parseInt(h), maxH);
                break;
            }
            hls[hls.length] = p;
            p = p.offsetParent;
        }

        // 逐层遍历父亲控件，计算剩余高度
        let i = 0;
        for (; i < hls.length; i++) {
            const e = hls[i];
            maxH = maxH - e.offsetTop;
        }

        //需要计算自身的顶部偏移
        maxH = maxH - el.offsetTop;

        if (maxH < 0) {
            maxH = 0;
        }

        // 向上搜索，直到父控件出现宽度限制，否则继续向上搜索
        let maxW = window.innerWidth;
        p = el.offsetParent;
        while (this.isNotNull(p)) {
            const w = p.style.width;
            if (this.isNotEmpty(w)) {
                maxW = Math.min(parseInt(w), maxW);
                break;
            }
            wls[wls.length] = p;
            p = p.offsetParent;
        }

        // 逐层遍历父亲控件，计算剩余宽度
        i = 0;
        for (; i < wls.length; i++) {
            const e = wls[i];
            maxW = maxW - e.offsetLeft;
        }

        //需要计算自身的左侧偏移
        maxW = maxW - el.offsetLeft;
        
        if (maxW < 0) {
            maxW = 0;
        }

        return {width: maxW, height: maxH};
    },
  },
}

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<q-page>

. . .

<q-scroll-area>

<q-resize-obeserver @resize="updateHeights" />

<q-scroll-area>

</q-page>

</template>

. . .

export default {

. . .

methods: {

. . .

updateHeights(size) {

// {

// width: 20 // width of container (in px)

// height: 50 // height of container (in px)

// }

//重新计算整个区域的高度，使得滚动区域占满整个父控件的高度

const sz = this.measureElWrapSize(this.$el);

this.$el.style.height = sz.height + 'px';

/**

* 字符串对象是否不为空

isNotEmpty: function (s) {

return (!this.isEmpty(s));

/**

* 字符串对象是否为空

isEmpty: function (s) {

return (this.isNull(s) || ('' === s));

/**

* 对象是否为空

isNull: function (o) {

return ((undefined === o) || (null === o));

/**

* 对象是否不为空

isNotNull: function (o) {

return (!this.isNull(o));

// 计算对象适配父控件大小,从底层开始向上搜索，直到搜索到受到限制的位置为止，然后反向计算应该得到的宽高

measureElWrapSize: function (el) {

const hls = []; //到第一次出现高度限制的父窗口的数组

const wls = []; //到第一次出现宽度限制的父窗口的数组

// 向上搜索，直到父控件出现高度限制，否则继续向上搜索

let p = el.offsetParent;

let maxH = window.innerHeight;

while (this.isNotNull(p)) {

const h = p.style.height;

if (this.isNotEmpty(h)) {

maxH = Math.min(parseInt(h), maxH);

break;

}

hls[hls.length] = p;

p = p.offsetParent;

}

// 逐层遍历父亲控件，计算剩余高度

let i = 0;

for (; i < hls.length; i++) {

const e = hls[i];

maxH = maxH - e.offsetTop;

}

//需要计算自身的顶部偏移

maxH = maxH - el.offsetTop;

if (maxH < 0) {

maxH = 0;

}

// 向上搜索，直到父控件出现宽度限制，否则继续向上搜索

let maxW = window.innerWidth;

p = el.offsetParent;

while (this.isNotNull(p)) {

const w = p.style.width;

if (this.isNotEmpty(w)) {

maxW = Math.min(parseInt(w), maxW);

break;

}

wls[wls.length] = p;

p = p.offsetParent;

}

// 逐层遍历父亲控件，计算剩余宽度

i = 0;

for (; i < wls.length; i++) {

const e = wls[i];

maxW = maxW - e.offsetLeft;

}

//需要计算自身的左侧偏移

maxW = maxW - el.offsetLeft;

if (maxW < 0) {

maxW = 0;

}

return {width: maxW, height: maxH};

}

或者类似下面的情况：

<div id="q-app">
    <div class="q-pa-md">
        <q-layout class="shadow-2 rounded-borders" container ref="mainView"
                  view="hHh Lpr lff">
            . . . 
            <q-resize-obeserver @resize="updateHeights" />
        </q-layout>
    </div>
</div>
</template>

<script>
. . . 
export default {
  . . . 
  methods: {
    . . .
    updateHeights(size) {
      // {
      //   width: 20 // width of container (in px)
      //   height: 50 // height of container (in px)
      // }
      const offset = this.$refs.mainView.$el.offsetTop;
      this.$refs.mainView.$el.style.height = (window.innerHeight - offset) + 'px';
    }
  },
}

<q-layout class="shadow-2 rounded-borders" container ref="mainView"

view="hHh Lpr lff">

. . .

<q-resize-obeserver @resize="updateHeights" />

</q-layout>

</div>

</template>

. . .

export default {

. . .

methods: {

. . .

updateHeights(size) {

// {

// width: 20 // width of container (in px)

// height: 50 // height of container (in px)

// }

const offset = this.$refs.mainView.$el.offsetTop;

this.$refs.mainView.$el.style.height = (window.innerHeight - offset) + 'px';

}

参考链接

clientHeight、offsetHeight、scrollHeight

我们开发WEB代码的时候,经常回遇到各种高度的计算. 因为总是忘记几者之间得区别,每次都要现查,这次通过这篇文章彻底搞明白这几个长度的区别。

继续阅读clientHeight、offsetHeight、scrollHeight

SM2的非对称加解密Java工具类(bcprov-jdk15on/bcprov-jdk16)

bcprov-jdk15on实现例子

Maven依赖:

<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcprov-jdk15on</artifactId>
    <version>1.54</version>
</dependency>

<groupId>org.bouncycastle</groupId>

<artifactId>bcprov-jdk15on</artifactId>

</dependency>

Java实现如下:

import java.math.BigInteger;
import java.security.SecureRandom;
import java.util.Arrays;
  
import org.bouncycastle.crypto.DerivationFunction;
import org.bouncycastle.crypto.digests.SHA256Digest;
import org.bouncycastle.crypto.digests.ShortenedDigest;
import org.bouncycastle.crypto.generators.KDF1BytesGenerator;
import org.bouncycastle.crypto.params.ISO18033KDFParameters;
import org.bouncycastle.math.ec.ECCurve;
import org.bouncycastle.math.ec.ECPoint;
  
/**
 *   <B>说 明<B/>:SM2的非对称加解密工具类，椭圆曲线方程为：y^2=x^3+ax+b 使用Fp-256
 */
public class SM2Util {
  
    /** 素数p */
    private static final BigInteger p = new BigInteger("FFFFFFFE" + "FFFFFFFF"
        + "FFFFFFFF" + "FFFFFFFF" + "FFFFFFFF" + "00000000" + "FFFFFFFF"
        + "FFFFFFFF", 16);
     
    /** 系数a */
    private static final BigInteger a = new BigInteger("FFFFFFFE" + "FFFFFFFF"
        + "FFFFFFFF" + "FFFFFFFF" + "FFFFFFFF" + "00000000" + "FFFFFFFF"
        + "FFFFFFFC", 16);
     
    /** 系数b */
    private static final BigInteger b = new BigInteger("28E9FA9E" + "9D9F5E34"
        + "4D5A9E4B" + "CF6509A7" + "F39789F5" + "15AB8F92" + "DDBCBD41"
        + "4D940E93", 16);
     
    /** 坐标x */
    private static final BigInteger xg = new BigInteger("32C4AE2C" + "1F198119"
        + "5F990446" + "6A39C994" + "8FE30BBF" + "F2660BE1" + "715A4589"
        + "334C74C7", 16);
     
    /** 坐标y */
    private static final BigInteger yg = new BigInteger("BC3736A2" + "F4F6779C"
        + "59BDCEE3" + "6B692153" + "D0A9877C" + "C62A4740" + "02DF32E5"
        + "2139F0A0", 16);
     
    /** 基点G, G=(xg,yg),其介记为n */
    private static final BigInteger n = new BigInteger("FFFFFFFE" + "FFFFFFFF"
            + "FFFFFFFF" + "FFFFFFFF" + "7203DF6B" + "21C6052B" + "53BBF409"
            + "39D54123", 16);
     
    private static SecureRandom random = new SecureRandom();
    private ECCurve.Fp curve;
    private ECPoint G;
  
    public static String printHexString(byte[] b) {
        StringBuilder builder = new StringBuilder();
        for (int i = 0; i < b.length; i++) {
            String hex = Integer.toHexString(b[i] & 0xFF);
            if (hex.length() == 1) {
                builder.append('0'+hex);
            hex = '0' + hex;
        }
    //          System.out.print(hex.toUpperCase());
            System.out.print(hex.toUpperCase());
            builder.append(hex);
        }
        System.out.println();
        return builder.toString();
    }
  
    public BigInteger random(BigInteger max) {
        BigInteger r = new BigInteger(256, random);
        // int count = 1;
        while (r.compareTo(max) >= 0) {
            r = new BigInteger(128, random);
            // count++;
        }
        // System.out.println("count: " + count);
        return r;
    }
  
    private boolean allZero(byte[] buffer) {
        for (int i = 0; i < buffer.length; i++) {
            if (buffer[i] != 0)
            return false;
        }
        return true;
    }
  
    /**
     * 加密
     * @param input 待加密消息M
     * @param publicKey 公钥
     * @return byte[] 加密后的字节数组
     */
    public byte[] encrypt(String input, ECPoint publicKey) {
         
        System.out.println("publicKey is: "+publicKey);
     
        byte[] inputBuffer = input.getBytes();
        printHexString(inputBuffer);
     
        /* 1 产生随机数k，k属于[1, n-1] */
        BigInteger k = random(n);
        System.out.print("k: ");
        printHexString(k.toByteArray());
     
        /* 2 计算椭圆曲线点C1 = [k]G = (x1, y1) */
        ECPoint C1 = G.multiply(k);
        byte[] C1Buffer = C1.getEncoded(false);
        System.out.print("C1: ");
        printHexString(C1Buffer);
         
        // 3 计算椭圆曲线点 S = [h]Pb * curve没有指定余因子，h为空
          
    //           BigInteger h = curve.getCofactor(); System.out.print("h: ");
    //           printHexString(h.toByteArray()); if (publicKey != null) { ECPoint
    //           result = publicKey.multiply(h); if (!result.isInfinity()) {
    //           System.out.println("pass"); } else {
    //          System.err.println("计算椭圆曲线点 S = [h]Pb失败"); return null; } }
     
        /* 4 计算 [k]PB = (x2, y2) */
        ECPoint kpb = publicKey.multiply(k).normalize();
     
        /* 5 计算 t = KDF(x2||y2, klen) */
        byte[] kpbBytes = kpb.getEncoded(false);
        DerivationFunction kdf = new KDF1BytesGenerator(new ShortenedDigest(
        new SHA256Digest(), 20));
        byte[] t = new byte[inputBuffer.length];
        kdf.init(new ISO18033KDFParameters(kpbBytes));
        kdf.generateBytes(t, 0, t.length);
     
        if (allZero(t)) {
        System.err.println("all zero");
        }
     
        /* 6 计算C2=M^t */
        byte[] C2 = new byte[inputBuffer.length];
        for (int i = 0; i < inputBuffer.length; i++) {
        C2[i] = (byte) (inputBuffer[i] ^ t[i]);
        }
     
        /* 7 计算C3 = Hash(x2 || M || y2) */
        byte[] C3 = calculateHash(kpb.getXCoord().toBigInteger(), inputBuffer,
        kpb.getYCoord().toBigInteger());
     
        /* 8 输出密文 C=C1 || C2 || C3 */
        byte[] encryptResult = new byte[C1Buffer.length + C2.length + C3.length];
        System.arraycopy(C1Buffer, 0, encryptResult, 0, C1Buffer.length);
        System.arraycopy(C2, 0, encryptResult, C1Buffer.length, C2.length);
        System.arraycopy(C3, 0, encryptResult, C1Buffer.length + C2.length,
        C3.length);
     
        System.out.print("密文: ");
        printHexString(encryptResult);
  
        return encryptResult;
    }
  
    public void decrypt(byte[] encryptData, BigInteger privateKey) {
        System.out.println("privateKey is: "+privateKey);
        System.out.println("encryptData length: " + encryptData.length);
     
        byte[] C1Byte = new byte[65];
        System.arraycopy(encryptData, 0, C1Byte, 0, C1Byte.length);
     
        ECPoint C1 = curve.decodePoint(C1Byte).normalize();
     
        /* 计算[dB]C1 = (x2, y2) */
        ECPoint dBC1 = C1.multiply(privateKey).normalize();
     
        /* 计算t = KDF(x2 || y2, klen) */
        byte[] dBC1Bytes = dBC1.getEncoded(false);
        DerivationFunction kdf = new KDF1BytesGenerator(new ShortenedDigest(
        new SHA256Digest(), 20));
     
        int klen = encryptData.length - 65 - 20;
        System.out.println("klen = " + klen);
     
        byte[] t = new byte[klen];
        kdf.init(new ISO18033KDFParameters(dBC1Bytes));
        kdf.generateBytes(t, 0, t.length);
     
        if (allZero(t)) {
            System.err.println("all zero");
        }
     
        /* 5 计算M'=C2^t */
        byte[] M = new byte[klen];
        for (int i = 0; i < M.length; i++) {
            M[i] = (byte) (encryptData[C1Byte.length + i] ^ t[i]);
        }
     
        /* 6 计算 u = Hash(x2 || M' || y2) 判断 u == C3是否成立 */
        byte[] C3 = new byte[20];
        System.arraycopy(encryptData, encryptData.length - 20, C3, 0, 20);
        byte[] u = calculateHash(dBC1.getXCoord().toBigInteger(), M, dBC1
        .getYCoord().toBigInteger());
        if (Arrays.equals(u, C3)) {
            System.out.println("解密成功");
            System.out.println("M' = " + new String(M));
        } else {
            System.out.print("u = ");
            printHexString(u);
            System.out.print("C3 = ");
            printHexString(C3);
            System.err.println("解密验证失败");
        }
    }
  
    private byte[] calculateHash(BigInteger x2, byte[] M, BigInteger y2) {
        ShortenedDigest digest = new ShortenedDigest(new SHA256Digest(), 20);
        byte[] buf = x2.toByteArray();
        digest.update(buf, 0, buf.length);
        digest.update(M, 0, M.length);
        buf = y2.toByteArray();
        digest.update(buf, 0, buf.length);
     
        buf = new byte[20];
        digest.doFinal(buf, 0);
        return buf;
    }
  
    private boolean between(BigInteger param, BigInteger min, BigInteger max) {
        if (param.compareTo(min) >= 0 && param.compareTo(max) < 0) {
            return true;
        } else {
            return false;
        }
    }
     
    /**
     * 公钥校验
     * @param publicKey 公钥
     * @return boolean true或false
     */
    private boolean checkPublicKey(ECPoint publicKey) {
        if (!publicKey.isInfinity()) {
            BigInteger x = publicKey.getXCoord().toBigInteger();
            BigInteger y = publicKey.getYCoord().toBigInteger();
            if (between(x, new BigInteger("0"), p) && between(y, new BigInteger("0"), p)) {
                BigInteger xResult = x.pow(3).add(a.multiply(x)).add(b).mod(p);
                System.out.println("xResult: " + xResult.toString());
                BigInteger yResult = y.pow(2).mod(p);
                System.out.println("yResult: " + yResult.toString());
                if (yResult.equals(xResult) && publicKey.multiply(n).isInfinity()) {
                    return true;
                }
            }
            return false;
        } else {
            return false;
        }
    }
     
    /**
     * 获得公私钥对
     * @return
     */
    public SM2KeyPair generateKeyPair() {
        BigInteger d = random(n.subtract(new BigInteger("1")));
        SM2KeyPair keyPair = new SM2KeyPair(G.multiply(d).normalize(), d);
        if (checkPublicKey(keyPair.getPublicKey())) {
            System.out.println("generate key successfully");
            return keyPair;
        } else {
            System.err.println("generate key failed");
            return null;
        }
    }
  
    public SM2Util() {
        curve = new ECCurve.Fp(p, // q
        a, // a
        b); // b
        G = curve.createPoint(xg, yg);
    }
     
}

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import java.math.BigInteger;

import java.security.SecureRandom;

import java.util.Arrays;

import org.bouncycastle.crypto.DerivationFunction;

import org.bouncycastle.crypto.digests.SHA256Digest;

import org.bouncycastle.crypto.digests.ShortenedDigest;

import org.bouncycastle.crypto.generators.KDF1BytesGenerator;

import org.bouncycastle.crypto.params.ISO18033KDFParameters;

import org.bouncycastle.math.ec.ECCurve;

import org.bouncycastle.math.ec.ECPoint;

/**

* <B>说明<B/>:SM2的非对称加解密工具类，椭圆曲线方程为：y^2=x^3+ax+b 使用Fp-256

public class SM2Util {

/** 素数p */

private static final BigInteger p = new BigInteger("FFFFFFFE" + "FFFFFFFF"

+ "FFFFFFFF" + "FFFFFFFF" + "FFFFFFFF" + "00000000" + "FFFFFFFF"

+ "FFFFFFFF", 16);

/** 系数a */

private static final BigInteger a = new BigInteger("FFFFFFFE" + "FFFFFFFF"

+ "FFFFFFFF" + "FFFFFFFF" + "FFFFFFFF" + "00000000" + "FFFFFFFF"

+ "FFFFFFFC", 16);

/** 系数b */

private static final BigInteger b = new BigInteger("28E9FA9E" + "9D9F5E34"

+ "4D5A9E4B" + "CF6509A7" + "F39789F5" + "15AB8F92" + "DDBCBD41"

+ "4D940E93", 16);

/** 坐标x */

private static final BigInteger xg = new BigInteger("32C4AE2C" + "1F198119"

+ "5F990446" + "6A39C994" + "8FE30BBF" + "F2660BE1" + "715A4589"

+ "334C74C7", 16);

/** 坐标y */

private static final BigInteger yg = new BigInteger("BC3736A2" + "F4F6779C"

+ "59BDCEE3" + "6B692153" + "D0A9877C" + "C62A4740" + "02DF32E5"

+ "2139F0A0", 16);

/** 基点G, G=(xg,yg),其介记为n */

private static final BigInteger n = new BigInteger("FFFFFFFE" + "FFFFFFFF"

+ "FFFFFFFF" + "FFFFFFFF" + "7203DF6B" + "21C6052B" + "53BBF409"

+ "39D54123", 16);

private static SecureRandom random = new SecureRandom();

private ECCurve.Fp curve;

private ECPoint G;

public static String printHexString(byte[] b) {

StringBuilder builder = new StringBuilder();

for (int i = 0; i < b.length; i++) {

String hex = Integer.toHexString(b[i] & 0xFF);

if (hex.length() == 1) {

builder.append('0'+hex);

hex = '0' + hex;

}

// System.out.print(hex.toUpperCase());

System.out.print(hex.toUpperCase());

builder.append(hex);

}

System.out.println();

return builder.toString();

}

public BigInteger random(BigInteger max) {

BigInteger r = new BigInteger(256, random);

// int count = 1;

while (r.compareTo(max) >= 0) {

r = new BigInteger(128, random);

// count++;

}

// System.out.println("count: " + count);

return r;

}

private boolean allZero(byte[] buffer) {

for (int i = 0; i < buffer.length; i++) {

if (buffer[i] != 0)

return false;

}

return true;

}

/**

* 加密

* @param input 待加密消息M

* @param publicKey 公钥

* @return byte[] 加密后的字节数组

public byte[] encrypt(String input, ECPoint publicKey) {

System.out.println("publicKey is: "+publicKey);

byte[] inputBuffer = input.getBytes();

printHexString(inputBuffer);

/* 1 产生随机数k，k属于[1, n-1] */

BigInteger k = random(n);

System.out.print("k: ");

printHexString(k.toByteArray());

/* 2 计算椭圆曲线点C1 = [k]G = (x1, y1) */

ECPoint C1 = G.multiply(k);

byte[] C1Buffer = C1.getEncoded(false);

System.out.print("C1: ");

printHexString(C1Buffer);

// 3 计算椭圆曲线点 S = [h]Pb * curve没有指定余因子，h为空

// BigInteger h = curve.getCofactor(); System.out.print("h: ");

// printHexString(h.toByteArray()); if (publicKey != null) { ECPoint

// result = publicKey.multiply(h); if (!result.isInfinity()) {

// System.out.println("pass"); } else {

// System.err.println("计算椭圆曲线点 S = [h]Pb失败"); return null; } }

/* 4 计算 [k]PB = (x2, y2) */

ECPoint kpb = publicKey.multiply(k).normalize();

/* 5 计算 t = KDF(x2||y2, klen) */

byte[] kpbBytes = kpb.getEncoded(false);

DerivationFunction kdf = new KDF1BytesGenerator(new ShortenedDigest(

new SHA256Digest(), 20));

byte[] t = new byte[inputBuffer.length];

kdf.init(new ISO18033KDFParameters(kpbBytes));

kdf.generateBytes(t, 0, t.length);

if (allZero(t)) {

System.err.println("all zero");

}

/* 6 计算C2=M^t */

byte[] C2 = new byte[inputBuffer.length];

for (int i = 0; i < inputBuffer.length; i++) {

C2[i] = (byte) (inputBuffer[i] ^ t[i]);

}

/* 7 计算C3 = Hash(x2 || M || y2) */

byte[] C3 = calculateHash(kpb.getXCoord().toBigInteger(), inputBuffer,

kpb.getYCoord().toBigInteger());

/* 8 输出密文 C=C1 || C2 || C3 */

byte[] encryptResult = new byte[C1Buffer.length + C2.length + C3.length];

System.arraycopy(C1Buffer, 0, encryptResult, 0, C1Buffer.length);

System.arraycopy(C2, 0, encryptResult, C1Buffer.length, C2.length);

System.arraycopy(C3, 0, encryptResult, C1Buffer.length + C2.length,

C3.length);

System.out.print("密文: ");

printHexString(encryptResult);

return encryptResult;

}

public void decrypt(byte[] encryptData, BigInteger privateKey) {

System.out.println("privateKey is: "+privateKey);

System.out.println("encryptData length: " + encryptData.length);

byte[] C1Byte = new byte[65];

System.arraycopy(encryptData, 0, C1Byte, 0, C1Byte.length);

ECPoint C1 = curve.decodePoint(C1Byte).normalize();

/* 计算[dB]C1 = (x2, y2) */

ECPoint dBC1 = C1.multiply(privateKey).normalize();

/* 计算t = KDF(x2 || y2, klen) */

byte[] dBC1Bytes = dBC1.getEncoded(false);

DerivationFunction kdf = new KDF1BytesGenerator(new ShortenedDigest(

new SHA256Digest(), 20));

int klen = encryptData.length - 65 - 20;

System.out.println("klen = " + klen);

byte[] t = new byte[klen];

kdf.init(new ISO18033KDFParameters(dBC1Bytes));

kdf.generateBytes(t, 0, t.length);

if (allZero(t)) {

System.err.println("all zero");

}

/* 5 计算M'=C2^t */

byte[] M = new byte[klen];

for (int i = 0; i < M.length; i++) {

M[i] = (byte) (encryptData[C1Byte.length + i] ^ t[i]);

}

/* 6 计算 u = Hash(x2 || M' || y2) 判断 u == C3是否成立 */

byte[] C3 = new byte[20];

System.arraycopy(encryptData, encryptData.length - 20, C3, 0, 20);

byte[] u = calculateHash(dBC1.getXCoord().toBigInteger(), M, dBC1

.getYCoord().toBigInteger());

if (Arrays.equals(u, C3)) {

System.out.println("解密成功");

System.out.println("M' = " + new String(M));

} else {

System.out.print("u = ");

printHexString(u);

System.out.print("C3 = ");

printHexString(C3);

System.err.println("解密验证失败");

}

private byte[] calculateHash(BigInteger x2, byte[] M, BigInteger y2) {

ShortenedDigest digest = new ShortenedDigest(new SHA256Digest(), 20);

byte[] buf = x2.toByteArray();

digest.update(buf, 0, buf.length);

digest.update(M, 0, M.length);

buf = y2.toByteArray();

digest.update(buf, 0, buf.length);

buf = new byte[20];

digest.doFinal(buf, 0);

return buf;

}

private boolean between(BigInteger param, BigInteger min, BigInteger max) {

if (param.compareTo(min) >= 0 && param.compareTo(max) < 0) {

return true;

} else {

return false;

}

/**

* 公钥校验

* @param publicKey 公钥

* @return boolean true或false

private boolean checkPublicKey(ECPoint publicKey) {

if (!publicKey.isInfinity()) {

BigInteger x = publicKey.getXCoord().toBigInteger();

BigInteger y = publicKey.getYCoord().toBigInteger();

if (between(x, new BigInteger("0"), p) && between(y, new BigInteger("0"), p)) {

BigInteger xResult = x.pow(3).add(a.multiply(x)).add(b).mod(p);

System.out.println("xResult: " + xResult.toString());

BigInteger yResult = y.pow(2).mod(p);

System.out.println("yResult: " + yResult.toString());

if (yResult.equals(xResult) && publicKey.multiply(n).isInfinity()) {

return true;

}

return false;

} else {

return false;

}

/**

* 获得公私钥对

* @return

public SM2KeyPair generateKeyPair() {

BigInteger d = random(n.subtract(new BigInteger("1")));

SM2KeyPair keyPair = new SM2KeyPair(G.multiply(d).normalize(), d);

if (checkPublicKey(keyPair.getPublicKey())) {

System.out.println("generate key successfully");

return keyPair;

} else {

System.err.println("generate key failed");

return null;

}

public SM2Util() {

curve = new ECCurve.Fp(p, // q

a, // a

b); // b

G = curve.createPoint(xg, yg);

}

import java.math.BigInteger;
  
import org.bouncycastle.math.ec.ECPoint;
  
/**
 *   <B>说 明<B/>:SM2公私钥实体类
 */
public class SM2KeyPair {
     
    /** 公钥 */
    private  ECPoint publicKey;
     
    /** 私钥 */
    private BigInteger privateKey;
  
    SM2KeyPair(ECPoint publicKey, BigInteger privateKey) {
        this.publicKey = publicKey;
        this.privateKey = privateKey;
    }
  
    public ECPoint getPublicKey() {
        return publicKey;
    }
  
    public BigInteger getPrivateKey() {
        return privateKey;
    }
     
}

import java.math.BigInteger;

import org.bouncycastle.math.ec.ECPoint;

/**

* <B>说明<B/>:SM2公私钥实体类

public class SM2KeyPair {

/** 公钥 */

private ECPoint publicKey;

/** 私钥 */

private BigInteger privateKey;

SM2KeyPair(ECPoint publicKey, BigInteger privateKey) {

this.publicKey = publicKey;

this.privateKey = privateKey;

}

public ECPoint getPublicKey() {

return publicKey;

}

public BigInteger getPrivateKey() {

return privateKey;

}

import java.util.Arrays;
  
/**
 *   <B>说 明<B/>:SM2非对称加解密工具类测试
 */
public class SM2UtilTest {
  
    /** 元消息串 */
    private static String M = "哈哈哈，&*&…………&、、//\\!@#$%^&*()物品woyebuzhidaowozijiqiaodesha!@#$%^&*())))))ooooooooppppppppppppppppppplllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkffffffffffffffffffffffffffffffffffffff";
     
    public static void main(String[] args) {
        SM2Util sm2 = new SM2Util();
        SM2KeyPair keyPair = sm2.generateKeyPair();
        byte[] data = sm2.encrypt(M,keyPair.getPublicKey());
        System.out.println("data is:"+Arrays.toString(data));
        sm2.decrypt(data, keyPair.getPrivateKey());//71017045908707391874054405929626258767106914144911649587813342322113806533034
    }
     
}

import java.util.Arrays;

/**

* <B>说明<B/>:SM2非对称加解密工具类测试

public class SM2UtilTest {

/** 元消息串 */

private static String M = "哈哈哈，&*&…………&、、//\\!@#$%^&*()物品woyebuzhidaowozijiqiaodesha!@#$%^&*())))))ooooooooppppppppppppppppppplllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkffffffffffffffffffffffffffffffffffffff";

public static void main(String[] args) {

SM2Util sm2 = new SM2Util();

SM2KeyPair keyPair = sm2.generateKeyPair();

byte[] data = sm2.encrypt(M,keyPair.getPublicKey());

System.out.println("data is:"+Arrays.toString(data));

sm2.decrypt(data, keyPair.getPrivateKey());//71017045908707391874054405929626258767106914144911649587813342322113806533034

}

bcprov-jdk16实现例子

<dependency>
	<groupId>org.bouncycastle</groupId>
	<artifactId>bcprov-jdk16</artifactId>
	<version>1.46</version>
</dependency>

<groupId>org.bouncycastle</groupId>

<artifactId>bcprov-jdk16</artifactId>

</dependency>

import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.math.ec.ECPoint;

import java.math.BigInteger;

public class Cipher {
    private int ct;
    private ECPoint p2;
    private SM3Digest sm3keybase;
    private SM3Digest sm3c3;
    private byte[] key;
    private byte keyOff;

    public Cipher() {
        this.ct = 1;
        this.key = new byte[32];
        this.keyOff = 0;
    }

    private void Reset() {
        this.sm3keybase = new SM3Digest();
        this.sm3c3 = new SM3Digest();

        byte[] p = Util.byteConvert32Bytes(p2.getX().toBigInteger());
        this.sm3keybase.update(p, 0, p.length);
        this.sm3c3.update(p, 0, p.length);

        p = Util.byteConvert32Bytes(p2.getY().toBigInteger());
        this.sm3keybase.update(p, 0, p.length);
        this.ct = 1;
        NextKey();
    }

    private void NextKey() {
        SM3Digest sm3keycur = new SM3Digest(this.sm3keybase);
        sm3keycur.update((byte) (ct >> 24 & 0xff));
        sm3keycur.update((byte) (ct >> 16 & 0xff));
        sm3keycur.update((byte) (ct >> 8 & 0xff));
        sm3keycur.update((byte) (ct & 0xff));
        sm3keycur.doFinal(key, 0);
        this.keyOff = 0;
        this.ct++;
    }

    public ECPoint Init_enc(SM2 sm2, ECPoint userKey) {
        AsymmetricCipherKeyPair key = sm2.ecc_key_pair_generator.generateKeyPair();
        ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters) key.getPrivate();
        ECPublicKeyParameters ecpub = (ECPublicKeyParameters) key.getPublic();
        BigInteger k = ecpriv.getD();
        ECPoint c1 = ecpub.getQ();
        this.p2 = userKey.multiply(k);
        Reset();
        return c1;
    }

    public void Encrypt(byte[] data) {
        this.sm3c3.update(data, 0, data.length);
        for (int i = 0; i < data.length; i++) {
            if (keyOff == key.length) {
                NextKey();
            }
            data[i] ^= key[keyOff++];
        }
    }

    public void Init_dec(BigInteger userD, ECPoint c1) {
        this.p2 = c1.multiply(userD);
        Reset();
    }

    public void Decrypt(byte[] data) {
        for (int i = 0; i < data.length; i++) {
            if (keyOff == key.length) {
                NextKey();
            }
            data[i] ^= key[keyOff++];
        }

        this.sm3c3.update(data, 0, data.length);
    }

    public void doFinal(byte[] c3) {
        byte[] p = Util.byteConvert32Bytes(p2.getY().toBigInteger());
        this.sm3c3.update(p, 0, p.length);
        this.sm3c3.doFinal(c3, 0);
        Reset();
    }
}

import org.bouncycastle.crypto.AsymmetricCipherKeyPair;

import org.bouncycastle.crypto.params.ECPrivateKeyParameters;

import org.bouncycastle.crypto.params.ECPublicKeyParameters;

import org.bouncycastle.math.ec.ECPoint;

import java.math.BigInteger;

public class Cipher {

private int ct;

private ECPoint p2;

private SM3Digest sm3keybase;

private SM3Digest sm3c3;

private byte[] key;

private byte keyOff;

public Cipher() {

this.ct = 1;

this.key = new byte[32];

this.keyOff = 0;

}

private void Reset() {

this.sm3keybase = new SM3Digest();

this.sm3c3 = new SM3Digest();

byte[] p = Util.byteConvert32Bytes(p2.getX().toBigInteger());

this.sm3keybase.update(p, 0, p.length);

this.sm3c3.update(p, 0, p.length);

p = Util.byteConvert32Bytes(p2.getY().toBigInteger());

this.sm3keybase.update(p, 0, p.length);

this.ct = 1;

NextKey();

}

private void NextKey() {

SM3Digest sm3keycur = new SM3Digest(this.sm3keybase);

sm3keycur.update((byte) (ct >> 24 & 0xff));

sm3keycur.update((byte) (ct >> 16 & 0xff));

sm3keycur.update((byte) (ct >> 8 & 0xff));

sm3keycur.update((byte) (ct & 0xff));

sm3keycur.doFinal(key, 0);

this.keyOff = 0;

this.ct++;

}

public ECPoint Init_enc(SM2 sm2, ECPoint userKey) {

AsymmetricCipherKeyPair key = sm2.ecc_key_pair_generator.generateKeyPair();

ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters) key.getPrivate();

ECPublicKeyParameters ecpub = (ECPublicKeyParameters) key.getPublic();

BigInteger k = ecpriv.getD();

ECPoint c1 = ecpub.getQ();

this.p2 = userKey.multiply(k);

Reset();

return c1;

}

public void Encrypt(byte[] data) {

this.sm3c3.update(data, 0, data.length);

for (int i = 0; i < data.length; i++) {

if (keyOff == key.length) {

NextKey();

}

data[i] ^= key[keyOff++];

}

public void Init_dec(BigInteger userD, ECPoint c1) {

this.p2 = c1.multiply(userD);

Reset();

}

public void Decrypt(byte[] data) {

for (int i = 0; i < data.length; i++) {

if (keyOff == key.length) {

NextKey();

}

data[i] ^= key[keyOff++];

}

this.sm3c3.update(data, 0, data.length);

}

public void doFinal(byte[] c3) {

byte[] p = Util.byteConvert32Bytes(p2.getY().toBigInteger());

this.sm3c3.update(p, 0, p.length);

this.sm3c3.doFinal(c3, 0);

Reset();

}

public class SM3 {
    public static final byte[] iv = {0x73, (byte) 0x80, 0x16, 0x6f, 0x49,
            0x14, (byte) 0xb2, (byte) 0xb9, 0x17, 0x24, 0x42, (byte) 0xd7,
            (byte) 0xda, (byte) 0x8a, 0x06, 0x00, (byte) 0xa9, 0x6f, 0x30,
            (byte) 0xbc, (byte) 0x16, 0x31, 0x38, (byte) 0xaa, (byte) 0xe3,
            (byte) 0x8d, (byte) 0xee, 0x4d, (byte) 0xb0, (byte) 0xfb, 0x0e,
            0x4e};

    public static int[] Tj = new int[64];

    static {
        for (int i = 0; i < 16; i++) {
            Tj[i] = 0x79cc4519;
        }

        for (int i = 16; i < 64; i++) {
            Tj[i] = 0x7a879d8a;
        }
    }

    public static byte[] CF(byte[] V, byte[] B) {
        int[] v, b;
        v = convert(V);
        b = convert(B);
        return convert(CF(v, b));
    }

    private static int[] convert(byte[] arr) {
        int[] out = new int[arr.length / 4];
        byte[] tmp = new byte[4];
        for (int i = 0; i < arr.length; i += 4) {
            System.arraycopy(arr, i, tmp, 0, 4);
            out[i / 4] = bigEndianByteToInt(tmp);
        }
        return out;
    }

    private static byte[] convert(int[] arr) {
        byte[] out = new byte[arr.length * 4];
        byte[] tmp = null;
        for (int i = 0; i < arr.length; i++) {
            tmp = bigEndianIntToByte(arr[i]);
            System.arraycopy(tmp, 0, out, i * 4, 4);
        }
        return out;
    }

    public static int[] CF(int[] V, int[] B) {
        int a, b, c, d, e, f, g, h;
        int ss1, ss2, tt1, tt2;
        a = V[0];
        b = V[1];
        c = V[2];
        d = V[3];
        e = V[4];
        f = V[5];
        g = V[6];
        h = V[7];

        int[][] arr = expand(B);
        int[] w = arr[0];
        int[] w1 = arr[1];

        for (int j = 0; j < 64; j++) {
            ss1 = (bitCycleLeft(a, 12) + e + bitCycleLeft(Tj[j], j));
            ss1 = bitCycleLeft(ss1, 7);
            ss2 = ss1 ^ bitCycleLeft(a, 12);
            tt1 = FFj(a, b, c, j) + d + ss2 + w1[j];
            tt2 = GGj(e, f, g, j) + h + ss1 + w[j];
            d = c;
            c = bitCycleLeft(b, 9);
            b = a;
            a = tt1;
            h = g;
            g = bitCycleLeft(f, 19);
            f = e;
            e = P0(tt2);  
		  
		            /*System.out.print(j+" "); 
		            System.out.print(Integer.toHexString(a)+" "); 
		            System.out.print(Integer.toHexString(b)+" "); 
		            System.out.print(Integer.toHexString(c)+" "); 
		            System.out.print(Integer.toHexString(d)+" "); 
		            System.out.print(Integer.toHexString(e)+" "); 
		            System.out.print(Integer.toHexString(f)+" "); 
		            System.out.print(Integer.toHexString(g)+" "); 
		            System.out.print(Integer.toHexString(h)+" "); 
		            System.out.println("");*/
        }
//		      System.out.println("");  

        int[] out = new int[8];
        out[0] = a ^ V[0];
        out[1] = b ^ V[1];
        out[2] = c ^ V[2];
        out[3] = d ^ V[3];
        out[4] = e ^ V[4];
        out[5] = f ^ V[5];
        out[6] = g ^ V[6];
        out[7] = h ^ V[7];

        return out;
    }

    private static int[][] expand(int[] B) {
        int[] W = new int[68];
        int[] W1 = new int[64];
        for (int i = 0; i < B.length; i++) {
            W[i] = B[i];
        }

        for (int i = 16; i < 68; i++) {
            W[i] = P1(W[i - 16] ^ W[i - 9] ^ bitCycleLeft(W[i - 3], 15))
                    ^ bitCycleLeft(W[i - 13], 7) ^ W[i - 6];
        }

        for (int i = 0; i < 64; i++) {
            W1[i] = W[i] ^ W[i + 4];
        }

        int[][] arr = new int[][]{W, W1};
        return arr;
    }

    private static byte[] bigEndianIntToByte(int num) {
        return back(Util.intToBytes(num));
    }

    private static int bigEndianByteToInt(byte[] bytes) {
        return Util.byteToInt(back(bytes));
    }

    private static int FFj(int X, int Y, int Z, int j) {
        if (j >= 0 && j <= 15) {
            return FF1j(X, Y, Z);
        } else {
            return FF2j(X, Y, Z);
        }
    }

    private static int GGj(int X, int Y, int Z, int j) {
        if (j >= 0 && j <= 15) {
            return GG1j(X, Y, Z);
        } else {
            return GG2j(X, Y, Z);
        }
    }

    // 逻辑位运算函数  
    private static int FF1j(int X, int Y, int Z) {
        int tmp = X ^ Y ^ Z;
        return tmp;
    }

    private static int FF2j(int X, int Y, int Z) {
        int tmp = ((X & Y) | (X & Z) | (Y & Z));
        return tmp;
    }

    private static int GG1j(int X, int Y, int Z) {
        int tmp = X ^ Y ^ Z;
        return tmp;
    }

    private static int GG2j(int X, int Y, int Z) {
        int tmp = (X & Y) | (~X & Z);
        return tmp;
    }

    private static int P0(int X) {
        int y = rotateLeft(X, 9);
        y = bitCycleLeft(X, 9);
        int z = rotateLeft(X, 17);
        z = bitCycleLeft(X, 17);
        int t = X ^ y ^ z;
        return t;
    }

    private static int P1(int X) {
        int t = X ^ bitCycleLeft(X, 15) ^ bitCycleLeft(X, 23);
        return t;
    }

    /**
     * 对最后一个分组字节数据padding
     *
     * @param in
     * @param bLen 分组个数
     * @return
     */
    public static byte[] padding(byte[] in, int bLen) {
        int k = 448 - (8 * in.length + 1) % 512;
        if (k < 0) {
            k = 960 - (8 * in.length + 1) % 512;
        }
        k += 1;
        byte[] padd = new byte[k / 8];
        padd[0] = (byte) 0x80;
        long n = in.length * 8 + bLen * 512;
        byte[] out = new byte[in.length + k / 8 + 64 / 8];
        int pos = 0;
        System.arraycopy(in, 0, out, 0, in.length);
        pos += in.length;
        System.arraycopy(padd, 0, out, pos, padd.length);
        pos += padd.length;
        byte[] tmp = back(Util.longToBytes(n));
        System.arraycopy(tmp, 0, out, pos, tmp.length);
        return out;
    }

    /**
     * 字节数组逆序
     *
     * @param in
     * @return
     */
    private static byte[] back(byte[] in) {
        byte[] out = new byte[in.length];
        for (int i = 0; i < out.length; i++) {
            out[i] = in[out.length - i - 1];
        }

        return out;
    }

    public static int rotateLeft(int x, int n) {
        return (x << n) | (x >> (32 - n));
    }

    private static int bitCycleLeft(int n, int bitLen) {
        bitLen %= 32;
        byte[] tmp = bigEndianIntToByte(n);
        int byteLen = bitLen / 8;
        int len = bitLen % 8;
        if (byteLen > 0) {
            tmp = byteCycleLeft(tmp, byteLen);
        }

        if (len > 0) {
            tmp = bitSmall8CycleLeft(tmp, len);
        }

        return bigEndianByteToInt(tmp);
    }

    private static byte[] bitSmall8CycleLeft(byte[] in, int len) {
        byte[] tmp = new byte[in.length];
        int t1, t2, t3;
        for (int i = 0; i < tmp.length; i++) {
            t1 = (byte) ((in[i] & 0x000000ff) << len);
            t2 = (byte) ((in[(i + 1) % tmp.length] & 0x000000ff) >> (8 - len));
            t3 = (byte) (t1 | t2);
            tmp[i] = (byte) t3;
        }

        return tmp;
    }

    private static byte[] byteCycleLeft(byte[] in, int byteLen) {
        byte[] tmp = new byte[in.length];
        System.arraycopy(in, byteLen, tmp, 0, in.length - byteLen);
        System.arraycopy(in, 0, tmp, in.length - byteLen, byteLen);
        return tmp;
    }
}

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public class SM3 {

public static final byte[] iv = {0x73, (byte) 0x80, 0x16, 0x6f, 0x49,

0x14, (byte) 0xb2, (byte) 0xb9, 0x17, 0x24, 0x42, (byte) 0xd7,

(byte) 0xda, (byte) 0x8a, 0x06, 0x00, (byte) 0xa9, 0x6f, 0x30,

(byte) 0xbc, (byte) 0x16, 0x31, 0x38, (byte) 0xaa, (byte) 0xe3,

(byte) 0x8d, (byte) 0xee, 0x4d, (byte) 0xb0, (byte) 0xfb, 0x0e,

0x4e};

public static int[] Tj = new int[64];

static {

for (int i = 0; i < 16; i++) {

Tj[i] = 0x79cc4519;

}

for (int i = 16; i < 64; i++) {

Tj[i] = 0x7a879d8a;

}

public static byte[] CF(byte[] V, byte[] B) {

int[] v, b;

v = convert(V);

b = convert(B);

return convert(CF(v, b));

}

private static int[] convert(byte[] arr) {

int[] out = new int[arr.length / 4];

byte[] tmp = new byte[4];

for (int i = 0; i < arr.length; i += 4) {

System.arraycopy(arr, i, tmp, 0, 4);

out[i / 4] = bigEndianByteToInt(tmp);

}

return out;

}

private static byte[] convert(int[] arr) {

byte[] out = new byte[arr.length * 4];

byte[] tmp = null;

for (int i = 0; i < arr.length; i++) {

tmp = bigEndianIntToByte(arr[i]);

System.arraycopy(tmp, 0, out, i * 4, 4);

}

return out;

}

public static int[] CF(int[] V, int[] B) {

int a, b, c, d, e, f, g, h;

int ss1, ss2, tt1, tt2;

a = V[0];

b = V[1];

c = V[2];

d = V[3];

e = V[4];

f = V[5];

g = V[6];

h = V[7];

int[][] arr = expand(B);

int[] w = arr[0];

int[] w1 = arr[1];

for (int j = 0; j < 64; j++) {

ss1 = (bitCycleLeft(a, 12) + e + bitCycleLeft(Tj[j], j));

ss1 = bitCycleLeft(ss1, 7);

ss2 = ss1 ^ bitCycleLeft(a, 12);

tt1 = FFj(a, b, c, j) + d + ss2 + w1[j];

tt2 = GGj(e, f, g, j) + h + ss1 + w[j];

d = c;

c = bitCycleLeft(b, 9);

b = a;

a = tt1;

h = g;

g = bitCycleLeft(f, 19);

f = e;

e = P0(tt2);

/*System.out.print(j+" ");

System.out.print(Integer.toHexString(a)+" ");

System.out.print(Integer.toHexString(b)+" ");

System.out.print(Integer.toHexString(c)+" ");

System.out.print(Integer.toHexString(d)+" ");

System.out.print(Integer.toHexString(e)+" ");

System.out.print(Integer.toHexString(f)+" ");

System.out.print(Integer.toHexString(g)+" ");

System.out.print(Integer.toHexString(h)+" ");

System.out.println("");*/

}

// System.out.println("");

int[] out = new int[8];

out[0] = a ^ V[0];

out[1] = b ^ V[1];

out[2] = c ^ V[2];

out[3] = d ^ V[3];

out[4] = e ^ V[4];

out[5] = f ^ V[5];

out[6] = g ^ V[6];

out[7] = h ^ V[7];

return out;

}

private static int[][] expand(int[] B) {

int[] W = new int[68];

int[] W1 = new int[64];

for (int i = 0; i < B.length; i++) {

W[i] = B[i];

}

for (int i = 16; i < 68; i++) {

W[i] = P1(W[i - 16] ^ W[i - 9] ^ bitCycleLeft(W[i - 3], 15))

^ bitCycleLeft(W[i - 13], 7) ^ W[i - 6];

}

for (int i = 0; i < 64; i++) {

W1[i] = W[i] ^ W[i + 4];

}

int[][] arr = new int[][]{W, W1};

return arr;

}

private static byte[] bigEndianIntToByte(int num) {

return back(Util.intToBytes(num));

}

private static int bigEndianByteToInt(byte[] bytes) {

return Util.byteToInt(back(bytes));

}

private static int FFj(int X, int Y, int Z, int j) {

if (j >= 0 && j <= 15) {

return FF1j(X, Y, Z);

} else {

return FF2j(X, Y, Z);

}

private static int GGj(int X, int Y, int Z, int j) {

if (j >= 0 && j <= 15) {

return GG1j(X, Y, Z);

} else {

return GG2j(X, Y, Z);

}

// 逻辑位运算函数

private static int FF1j(int X, int Y, int Z) {

int tmp = X ^ Y ^ Z;

return tmp;

}

private static int FF2j(int X, int Y, int Z) {

int tmp = ((X & Y) | (X & Z) | (Y & Z));

return tmp;

}

private static int GG1j(int X, int Y, int Z) {

int tmp = X ^ Y ^ Z;

return tmp;

}

private static int GG2j(int X, int Y, int Z) {

int tmp = (X & Y) | (~X & Z);

return tmp;

}

private static int P0(int X) {

int y = rotateLeft(X, 9);

y = bitCycleLeft(X, 9);

int z = rotateLeft(X, 17);

z = bitCycleLeft(X, 17);

int t = X ^ y ^ z;

return t;

}

private static int P1(int X) {

int t = X ^ bitCycleLeft(X, 15) ^ bitCycleLeft(X, 23);

return t;

}

/**

* 对最后一个分组字节数据padding

* @param in

* @param bLen 分组个数

* @return

public static byte[] padding(byte[] in, int bLen) {

int k = 448 - (8 * in.length + 1) % 512;

if (k < 0) {

k = 960 - (8 * in.length + 1) % 512;

}

k += 1;

byte[] padd = new byte[k / 8];

padd[0] = (byte) 0x80;

long n = in.length * 8 + bLen * 512;

byte[] out = new byte[in.length + k / 8 + 64 / 8];

int pos = 0;

System.arraycopy(in, 0, out, 0, in.length);

pos += in.length;

System.arraycopy(padd, 0, out, pos, padd.length);

pos += padd.length;

byte[] tmp = back(Util.longToBytes(n));

System.arraycopy(tmp, 0, out, pos, tmp.length);

return out;

}

/**

* 字节数组逆序

* @param in

* @return

private static byte[] back(byte[] in) {

byte[] out = new byte[in.length];

for (int i = 0; i < out.length; i++) {

out[i] = in[out.length - i - 1];

}

return out;

}

public static int rotateLeft(int x, int n) {

return (x << n) | (x >> (32 - n));

}

private static int bitCycleLeft(int n, int bitLen) {

bitLen %= 32;

byte[] tmp = bigEndianIntToByte(n);

int byteLen = bitLen / 8;

int len = bitLen % 8;

if (byteLen > 0) {

tmp = byteCycleLeft(tmp, byteLen);

}

if (len > 0) {

tmp = bitSmall8CycleLeft(tmp, len);

}

return bigEndianByteToInt(tmp);

}

private static byte[] bitSmall8CycleLeft(byte[] in, int len) {

byte[] tmp = new byte[in.length];

int t1, t2, t3;

for (int i = 0; i < tmp.length; i++) {

t1 = (byte) ((in[i] & 0x000000ff) << len);

t2 = (byte) ((in[(i + 1) % tmp.length] & 0x000000ff) >> (8 - len));

t3 = (byte) (t1 | t2);

tmp[i] = (byte) t3;

}

return tmp;

}

private static byte[] byteCycleLeft(byte[] in, int byteLen) {

byte[] tmp = new byte[in.length];

System.arraycopy(in, byteLen, tmp, 0, in.length - byteLen);

System.arraycopy(in, 0, tmp, in.length - byteLen, byteLen);

return tmp;

}

import org.bouncycastle.util.encoders.Hex;

public class SM3Digest {
    /**
     * SM3值的长度
     */
    private static final int BYTE_LENGTH = 32;

    /**
     * SM3分组长度
     */
    private static final int BLOCK_LENGTH = 64;

    /**
     * 缓冲区长度
     */
    private static final int BUFFER_LENGTH = BLOCK_LENGTH * 1;

    /**
     * 缓冲区
     */
    private byte[] xBuf = new byte[BUFFER_LENGTH];

    /**
     * 缓冲区偏移量
     */
    private int xBufOff;

    /**
     * 初始向量
     */
    private byte[] V = SM3.iv.clone();

    private int cntBlock = 0;

    public SM3Digest() {
    }

    public SM3Digest(SM3Digest t) {
        System.arraycopy(t.xBuf, 0, this.xBuf, 0, t.xBuf.length);
        this.xBufOff = t.xBufOff;
        System.arraycopy(t.V, 0, this.V, 0, t.V.length);
    }

    public static void main(String[] args) {
        byte[] md = new byte[32];
        byte[] msg1 = "ererfeiisgod".getBytes();
        SM3Digest sm3 = new SM3Digest();
        sm3.update(msg1, 0, msg1.length);
        sm3.doFinal(md, 0);
        String s = new String(Hex.encode(md));
        System.out.println(s.toUpperCase());
    }

    /**
     * SM3结果输出
     *
     * @param out    保存SM3结构的缓冲区
     * @param outOff 缓冲区偏移量
     * @return
     */
    public int doFinal(byte[] out, int outOff) {
        byte[] tmp = doFinal();
        System.arraycopy(tmp, 0, out, 0, tmp.length);
        return BYTE_LENGTH;
    }

    public void reset() {
        xBufOff = 0;
        cntBlock = 0;
        V = SM3.iv.clone();
    }

    /**
     * 明文输入
     *
     * @param in    明文输入缓冲区
     * @param inOff 缓冲区偏移量
     * @param len   明文长度
     */
    public void update(byte[] in, int inOff, int len) {
        int partLen = BUFFER_LENGTH - xBufOff;
        int inputLen = len;
        int dPos = inOff;
        if (partLen < inputLen) {
            System.arraycopy(in, dPos, xBuf, xBufOff, partLen);
            inputLen -= partLen;
            dPos += partLen;
            doUpdate();
            while (inputLen > BUFFER_LENGTH) {
                System.arraycopy(in, dPos, xBuf, 0, BUFFER_LENGTH);
                inputLen -= BUFFER_LENGTH;
                dPos += BUFFER_LENGTH;
                doUpdate();
            }
        }

        System.arraycopy(in, dPos, xBuf, xBufOff, inputLen);
        xBufOff += inputLen;
    }

    private void doUpdate() {
        byte[] B = new byte[BLOCK_LENGTH];
        for (int i = 0; i < BUFFER_LENGTH; i += BLOCK_LENGTH) {
            System.arraycopy(xBuf, i, B, 0, B.length);
            doHash(B);
        }
        xBufOff = 0;
    }

    private void doHash(byte[] B) {
        byte[] tmp = SM3.CF(V, B);
        System.arraycopy(tmp, 0, V, 0, V.length);
        cntBlock++;
    }

    private byte[] doFinal() {
        byte[] B = new byte[BLOCK_LENGTH];
        byte[] buffer = new byte[xBufOff];
        System.arraycopy(xBuf, 0, buffer, 0, buffer.length);
        byte[] tmp = SM3.padding(buffer, cntBlock);
        for (int i = 0; i < tmp.length; i += BLOCK_LENGTH) {
            System.arraycopy(tmp, i, B, 0, B.length);
            doHash(B);
        }
        return V;
    }

    public void update(byte in) {
        byte[] buffer = new byte[]{in};
        update(buffer, 0, 1);
    }

    public int getDigestSize() {
        return BYTE_LENGTH;
    }
}

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import org.bouncycastle.util.encoders.Hex;

public class SM3Digest {

/**

* SM3值的长度

private static final int BYTE_LENGTH = 32;

/**

* SM3分组长度

private static final int BLOCK_LENGTH = 64;

/**

* 缓冲区长度

private static final int BUFFER_LENGTH = BLOCK_LENGTH * 1;

/**

* 缓冲区

private byte[] xBuf = new byte[BUFFER_LENGTH];

/**

* 缓冲区偏移量

private int xBufOff;

/**

* 初始向量

private byte[] V = SM3.iv.clone();

private int cntBlock = 0;

public SM3Digest() {

}

public SM3Digest(SM3Digest t) {

System.arraycopy(t.xBuf, 0, this.xBuf, 0, t.xBuf.length);

this.xBufOff = t.xBufOff;

System.arraycopy(t.V, 0, this.V, 0, t.V.length);

}

public static void main(String[] args) {

byte[] md = new byte[32];

byte[] msg1 = "ererfeiisgod".getBytes();

SM3Digest sm3 = new SM3Digest();

sm3.update(msg1, 0, msg1.length);

sm3.doFinal(md, 0);

String s = new String(Hex.encode(md));

System.out.println(s.toUpperCase());

}

/**

* SM3结果输出

* @param out 保存SM3结构的缓冲区

* @param outOff 缓冲区偏移量

* @return

public int doFinal(byte[] out, int outOff) {

byte[] tmp = doFinal();

System.arraycopy(tmp, 0, out, 0, tmp.length);

return BYTE_LENGTH;

}

public void reset() {

xBufOff = 0;

cntBlock = 0;

V = SM3.iv.clone();

}

/**

* 明文输入

* @param in 明文输入缓冲区

* @param inOff 缓冲区偏移量

* @param len 明文长度

public void update(byte[] in, int inOff, int len) {

int partLen = BUFFER_LENGTH - xBufOff;

int inputLen = len;

int dPos = inOff;

if (partLen < inputLen) {

System.arraycopy(in, dPos, xBuf, xBufOff, partLen);

inputLen -= partLen;

dPos += partLen;

doUpdate();

while (inputLen > BUFFER_LENGTH) {

System.arraycopy(in, dPos, xBuf, 0, BUFFER_LENGTH);

inputLen -= BUFFER_LENGTH;

dPos += BUFFER_LENGTH;

doUpdate();

}

System.arraycopy(in, dPos, xBuf, xBufOff, inputLen);

xBufOff += inputLen;

}

private void doUpdate() {

byte[] B = new byte[BLOCK_LENGTH];

for (int i = 0; i < BUFFER_LENGTH; i += BLOCK_LENGTH) {

System.arraycopy(xBuf, i, B, 0, B.length);

doHash(B);

}

xBufOff = 0;

}

private void doHash(byte[] B) {

byte[] tmp = SM3.CF(V, B);

System.arraycopy(tmp, 0, V, 0, V.length);

cntBlock++;

}

private byte[] doFinal() {

byte[] B = new byte[BLOCK_LENGTH];

byte[] buffer = new byte[xBufOff];

System.arraycopy(xBuf, 0, buffer, 0, buffer.length);

byte[] tmp = SM3.padding(buffer, cntBlock);

for (int i = 0; i < tmp.length; i += BLOCK_LENGTH) {

System.arraycopy(tmp, i, B, 0, B.length);

doHash(B);

}

return V;

}

public void update(byte in) {

byte[] buffer = new byte[]{in};

update(buffer, 0, 1);

}

public int getDigestSize() {

return BYTE_LENGTH;

}

import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
import org.bouncycastle.math.ec.ECCurve;
import org.bouncycastle.math.ec.ECFieldElement;
import org.bouncycastle.math.ec.ECFieldElement.Fp;
import org.bouncycastle.math.ec.ECPoint;

import java.math.BigInteger;
import java.security.SecureRandom;

public class SM2 {
    //测试参数  
//  public static final String[] ecc_param = {  
//      "8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3",   
//      "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498",   
//      "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A",   
//      "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7",   
//      "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D",   
//      "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2"   
//  };  

    //正式参数  
    public static String[] ecc_param = {
            "FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF",
            "FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFC",
            "28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCBD414D940E93",
            "FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFF7203DF6B21C6052B53BBF40939D54123",
            "32C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1715A4589334C74C7",
            "BC3736A2F4F6779C59BDCEE36B692153D0A9877CC62A474002DF32E52139F0A0"
    };
    public final BigInteger ecc_p;
    public final BigInteger ecc_a;
    public final BigInteger ecc_b;
    public final BigInteger ecc_n;
    public final BigInteger ecc_gx;
    public final BigInteger ecc_gy;
    public final ECCurve ecc_curve;
    public final ECPoint ecc_point_g;
    public final ECDomainParameters ecc_bc_spec;
    public final ECKeyPairGenerator ecc_key_pair_generator;
    public final ECFieldElement ecc_gx_fieldelement;
    public final ECFieldElement ecc_gy_fieldelement;
    public SM2() {
        this.ecc_p = new BigInteger(ecc_param[0], 16);
        this.ecc_a = new BigInteger(ecc_param[1], 16);
        this.ecc_b = new BigInteger(ecc_param[2], 16);
        this.ecc_n = new BigInteger(ecc_param[3], 16);
        this.ecc_gx = new BigInteger(ecc_param[4], 16);
        this.ecc_gy = new BigInteger(ecc_param[5], 16);

        this.ecc_gx_fieldelement = new Fp(this.ecc_p, this.ecc_gx);
        this.ecc_gy_fieldelement = new Fp(this.ecc_p, this.ecc_gy);

        this.ecc_curve = new ECCurve.Fp(this.ecc_p, this.ecc_a, this.ecc_b);
        this.ecc_point_g = new ECPoint.Fp(this.ecc_curve, this.ecc_gx_fieldelement, this.ecc_gy_fieldelement);

        this.ecc_bc_spec = new ECDomainParameters(this.ecc_curve, this.ecc_point_g, this.ecc_n);

        ECKeyGenerationParameters ecc_ecgenparam;
        ecc_ecgenparam = new ECKeyGenerationParameters(this.ecc_bc_spec, new SecureRandom());

        this.ecc_key_pair_generator = new ECKeyPairGenerator();
        this.ecc_key_pair_generator.init(ecc_ecgenparam);
    }

    public static SM2 Instance() {
        return new SM2();
    }
}

import org.bouncycastle.crypto.generators.ECKeyPairGenerator;

import org.bouncycastle.crypto.params.ECDomainParameters;

import org.bouncycastle.crypto.params.ECKeyGenerationParameters;

import org.bouncycastle.math.ec.ECCurve;

import org.bouncycastle.math.ec.ECFieldElement;

import org.bouncycastle.math.ec.ECFieldElement.Fp;

import org.bouncycastle.math.ec.ECPoint;

import java.math.BigInteger;

import java.security.SecureRandom;

public class SM2 {

//测试参数

// public static final String[] ecc_param = {

// "8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3",

// "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498",

// "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A",

// "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7",

// "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D",

// "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2"

// };

//正式参数

public static String[] ecc_param = {

"FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF",

"FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFC",

"28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCBD414D940E93",

"FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFF7203DF6B21C6052B53BBF40939D54123",

"32C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1715A4589334C74C7",

"BC3736A2F4F6779C59BDCEE36B692153D0A9877CC62A474002DF32E52139F0A0"

};

public final BigInteger ecc_p;

public final BigInteger ecc_a;

public final BigInteger ecc_b;

public final BigInteger ecc_n;

public final BigInteger ecc_gx;

public final BigInteger ecc_gy;

public final ECCurve ecc_curve;

public final ECPoint ecc_point_g;

public final ECDomainParameters ecc_bc_spec;

public final ECKeyPairGenerator ecc_key_pair_generator;

public final ECFieldElement ecc_gx_fieldelement;

public final ECFieldElement ecc_gy_fieldelement;

public SM2() {

this.ecc_p = new BigInteger(ecc_param[0], 16);

this.ecc_a = new BigInteger(ecc_param[1], 16);

this.ecc_b = new BigInteger(ecc_param[2], 16);

this.ecc_n = new BigInteger(ecc_param[3], 16);

this.ecc_gx = new BigInteger(ecc_param[4], 16);

this.ecc_gy = new BigInteger(ecc_param[5], 16);

this.ecc_gx_fieldelement = new Fp(this.ecc_p, this.ecc_gx);

this.ecc_gy_fieldelement = new Fp(this.ecc_p, this.ecc_gy);

this.ecc_curve = new ECCurve.Fp(this.ecc_p, this.ecc_a, this.ecc_b);

this.ecc_point_g = new ECPoint.Fp(this.ecc_curve, this.ecc_gx_fieldelement, this.ecc_gy_fieldelement);

this.ecc_bc_spec = new ECDomainParameters(this.ecc_curve, this.ecc_point_g, this.ecc_n);

ECKeyGenerationParameters ecc_ecgenparam;

ecc_ecgenparam = new ECKeyGenerationParameters(this.ecc_bc_spec, new SecureRandom());

this.ecc_key_pair_generator = new ECKeyPairGenerator();

this.ecc_key_pair_generator.init(ecc_ecgenparam);

}

public static SM2 Instance() {

return new SM2();

}

import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.math.ec.ECPoint;

import java.io.IOException;
import java.math.BigInteger;

public class SM2Utils {
    //生成随机秘钥对  
    public static void generateKeyPair() {
        SM2 sm2 = SM2.Instance();
        AsymmetricCipherKeyPair key = sm2.ecc_key_pair_generator.generateKeyPair();
        ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters) key.getPrivate();
        ECPublicKeyParameters ecpub = (ECPublicKeyParameters) key.getPublic();
        BigInteger privateKey = ecpriv.getD();
        ECPoint publicKey = ecpub.getQ();

        System.out.println("公钥: " + Util.byteToHex(publicKey.getEncoded()));
        System.out.println("私钥: " + Util.byteToHex(privateKey.toByteArray()));
    }

    //数据加密  
    public static String encrypt(byte[] publicKey, byte[] data) throws IOException {
        if (publicKey == null || publicKey.length == 0) {
            return null;
        }

        if (data == null || data.length == 0) {
            return null;
        }

        byte[] source = new byte[data.length];
        System.arraycopy(data, 0, source, 0, data.length);

        Cipher cipher = new Cipher();
        SM2 sm2 = SM2.Instance();
        ECPoint userKey = sm2.ecc_curve.decodePoint(publicKey);

        ECPoint c1 = cipher.Init_enc(sm2, userKey);
        cipher.Encrypt(source);
        byte[] c3 = new byte[32];
        cipher.doFinal(c3);

//      System.out.println("C1 " + Util.byteToHex(c1.getEncoded()));  
//      System.out.println("C2 " + Util.byteToHex(source));  
//      System.out.println("C3 " + Util.byteToHex(c3));  
        //C1 C2 C3拼装成加密字串  
        return Util.byteToHex(c1.getEncoded()) + Util.byteToHex(source) + Util.byteToHex(c3);

    }

    //数据解密
    //c3InFront 硬件为了方便加解密数据，把定长的C3放在变长的C2前面，由默认的C1C2C3调整成C1C3C2的格式
    public static byte[] decrypt(byte[] privateKey, byte[] encryptedData, boolean c3InFront) throws IOException {
        if (privateKey == null || privateKey.length == 0) {
            return null;
        }

        if (encryptedData == null || encryptedData.length == 0) {
            return null;
        }
        //加密字节数组转换为十六进制的字符串 长度变为encryptedData.length * 2  
        String data = Util.byteToHex(encryptedData);
        /***分解加密字串 
         * （C1 = C1标志位2位 + C1实体部分128位 = 130） 
         * （C3 = C3实体部分64位  = 64） 
         * （C2 = encryptedData.length * 2 - C1长度  - C2长度） 
         */
        byte[] c1Bytes = Util.hexToByte(data.substring(0, 130));
        byte[] c2;
        byte[] c3; 
        if (c3InFront) {
            c3 = Util.hexToByte(data.substring(130, 64));
            c2 = Util.hexToByte(data.substring(130 + 64));
        } else {
            /***C1 || C2 || C3 的意思就是拼在一起，而不是做什么或运算
             * 
             * 根据国密推荐的SM2椭圆曲线公钥密码算法，首先产生随机数计算出曲线点C1，
             * 2个32byte的BIGNUM大数，即为SM2加密结果的第1部分（C1）。
             * 第2部分则是真正的密文，是对明文的加密结果，长度和明文一样（C2）。
             * 第3部分是杂凑值，用来效验数据（C3）。按国密推荐的256位椭圆曲线，
             * 明文加密结果比原长度会大97byte（C1使用EC_POINT_point2oct转换）。
             * 
             */
            int c2Len = encryptedData.length - 97;
            c2 = Util.hexToByte(data.substring(130, 130 + 2 * c2Len));
            c3 = Util.hexToByte(data.substring(130 + 2 * c2Len, 194 + 2 * c2Len));
        }
        SM2 sm2 = SM2.Instance();
        BigInteger userD = new BigInteger(1, privateKey);

        //通过C1实体字节来生成ECPoint  
        ECPoint c1 = sm2.ecc_curve.decodePoint(c1Bytes);
        Cipher cipher = new Cipher();
        cipher.Init_dec(userD, c1);
        cipher.Decrypt(c2);
        cipher.doFinal(c3);

        //返回解密结果  
        return c2;
    }

    public static void main(String[] args) throws Exception {
        //生成密钥对  
        generateKeyPair();

        String plainText = "ererfeiisgod";
        byte[] sourceData = plainText.getBytes();

        //下面的秘钥可以使用generateKeyPair()生成的秘钥内容  
        // 国密规范正式私钥  
        String prik = "3690655E33D5EA3D9A4AE1A1ADD766FDEA045CDEAA43A9206FB8C430CEFE0D94";
        // 国密规范正式公钥  
        String pubk = "04F6E0C3345AE42B51E06BF50B98834988D54EBC7460FE135A48171BC0629EAE205EEDE253A530608178A98F1E19BB737302813BA39ED3FA3C51639D7A20C7391A";

        System.out.println("加密: ");
        String cipherText = SM2Utils.encrypt(Util.hexToByte(pubk), sourceData);
        System.out.println(cipherText);
        System.out.println("解密: ");
        plainText = new String(SM2Utils.decrypt(Util.hexToByte(prik), Util.hexToByte(cipherText), false));
        System.out.println(plainText);

    }
}

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import org.bouncycastle.crypto.AsymmetricCipherKeyPair;

import org.bouncycastle.crypto.params.ECPrivateKeyParameters;

import org.bouncycastle.crypto.params.ECPublicKeyParameters;

import org.bouncycastle.math.ec.ECPoint;

import java.io.IOException;

import java.math.BigInteger;

public class SM2Utils {

//生成随机秘钥对

public static void generateKeyPair() {

SM2 sm2 = SM2.Instance();

AsymmetricCipherKeyPair key = sm2.ecc_key_pair_generator.generateKeyPair();

ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters) key.getPrivate();

ECPublicKeyParameters ecpub = (ECPublicKeyParameters) key.getPublic();

BigInteger privateKey = ecpriv.getD();

ECPoint publicKey = ecpub.getQ();

System.out.println("公钥: " + Util.byteToHex(publicKey.getEncoded()));

System.out.println("私钥: " + Util.byteToHex(privateKey.toByteArray()));

}

//数据加密

public static String encrypt(byte[] publicKey, byte[] data) throws IOException {

if (publicKey == null || publicKey.length == 0) {

return null;

}

if (data == null || data.length == 0) {

return null;

}

byte[] source = new byte[data.length];

System.arraycopy(data, 0, source, 0, data.length);

Cipher cipher = new Cipher();

SM2 sm2 = SM2.Instance();

ECPoint userKey = sm2.ecc_curve.decodePoint(publicKey);

ECPoint c1 = cipher.Init_enc(sm2, userKey);

cipher.Encrypt(source);

byte[] c3 = new byte[32];

cipher.doFinal(c3);

// System.out.println("C1 " + Util.byteToHex(c1.getEncoded()));

// System.out.println("C2 " + Util.byteToHex(source));

// System.out.println("C3 " + Util.byteToHex(c3));

//C1 C2 C3拼装成加密字串

return Util.byteToHex(c1.getEncoded()) + Util.byteToHex(source) + Util.byteToHex(c3);

}

//数据解密

//c3InFront 硬件为了方便加解密数据，把定长的C3放在变长的C2前面，由默认的C1C2C3调整成C1C3C2的格式

public static byte[] decrypt(byte[] privateKey, byte[] encryptedData, boolean c3InFront) throws IOException {

if (privateKey == null || privateKey.length == 0) {

return null;

}

if (encryptedData == null || encryptedData.length == 0) {

return null;

}

//加密字节数组转换为十六进制的字符串长度变为encryptedData.length * 2

String data = Util.byteToHex(encryptedData);

/***分解加密字串

* （C1 = C1标志位2位 + C1实体部分128位 = 130）

* （C3 = C3实体部分64位 = 64）

* （C2 = encryptedData.length * 2 - C1长度 - C2长度）

byte[] c1Bytes = Util.hexToByte(data.substring(0, 130));

byte[] c2;

byte[] c3;

if (c3InFront) {

c3 = Util.hexToByte(data.substring(130, 64));

c2 = Util.hexToByte(data.substring(130 + 64));

} else {

/***C1 || C2 || C3 的意思就是拼在一起，而不是做什么或运算

* 根据国密推荐的SM2椭圆曲线公钥密码算法，首先产生随机数计算出曲线点C1，

* 2个32byte的BIGNUM大数，即为SM2加密结果的第1部分（C1）。

* 第2部分则是真正的密文，是对明文的加密结果，长度和明文一样（C2）。

* 第3部分是杂凑值，用来效验数据（C3）。按国密推荐的256位椭圆曲线，

* 明文加密结果比原长度会大97byte（C1使用EC_POINT_point2oct转换）。

int c2Len = encryptedData.length - 97;

c2 = Util.hexToByte(data.substring(130, 130 + 2 * c2Len));

c3 = Util.hexToByte(data.substring(130 + 2 * c2Len, 194 + 2 * c2Len));

}

SM2 sm2 = SM2.Instance();

BigInteger userD = new BigInteger(1, privateKey);

//通过C1实体字节来生成ECPoint

ECPoint c1 = sm2.ecc_curve.decodePoint(c1Bytes);

Cipher cipher = new Cipher();

cipher.Init_dec(userD, c1);

cipher.Decrypt(c2);

cipher.doFinal(c3);

//返回解密结果

return c2;

}

public static void main(String[] args) throws Exception {

//生成密钥对

generateKeyPair();

String plainText = "ererfeiisgod";

byte[] sourceData = plainText.getBytes();

//下面的秘钥可以使用generateKeyPair()生成的秘钥内容

// 国密规范正式私钥

String prik = "3690655E33D5EA3D9A4AE1A1ADD766FDEA045CDEAA43A9206FB8C430CEFE0D94";

// 国密规范正式公钥

String pubk = "04F6E0C3345AE42B51E06BF50B98834988D54EBC7460FE135A48171BC0629EAE205EEDE253A530608178A98F1E19BB737302813BA39ED3FA3C51639D7A20C7391A";

System.out.println("加密: ");

String cipherText = SM2Utils.encrypt(Util.hexToByte(pubk), sourceData);

System.out.println(cipherText);

System.out.println("解密: ");

plainText = new String(SM2Utils.decrypt(Util.hexToByte(prik), Util.hexToByte(cipherText), false));

System.out.println(plainText);

}

import java.math.BigInteger;

public class Util {
    /**
     * 用于建立十六进制字符的输出的小写字符数组
     */
    private static final char[] DIGITS_LOWER = {'0', '1', '2', '3', '4', '5',
            '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
    /**
     * 用于建立十六进制字符的输出的大写字符数组
     */
    private static final char[] DIGITS_UPPER = {'0', '1', '2', '3', '4', '5',
            '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};

    /**
     * 整形转换成网络传输的字节流（字节数组）型数据
     *
     * @param num 一个整型数据
     * @return 4个字节的自己数组
     */
    public static byte[] intToBytes(int num) {
        byte[] bytes = new byte[4];
        bytes[0] = (byte) (0xff & (num >> 0));
        bytes[1] = (byte) (0xff & (num >> 8));
        bytes[2] = (byte) (0xff & (num >> 16));
        bytes[3] = (byte) (0xff & (num >> 24));
        return bytes;
    }

    /**
     * 四个字节的字节数据转换成一个整形数据
     *
     * @param bytes 4个字节的字节数组
     * @return 一个整型数据
     */
    public static int byteToInt(byte[] bytes) {
        int num = 0;
        int temp;
        temp = (0x000000ff & (bytes[0])) << 0;
        num = num | temp;
        temp = (0x000000ff & (bytes[1])) << 8;
        num = num | temp;
        temp = (0x000000ff & (bytes[2])) << 16;
        num = num | temp;
        temp = (0x000000ff & (bytes[3])) << 24;
        num = num | temp;
        return num;
    }

    /**
     * 长整形转换成网络传输的字节流（字节数组）型数据
     *
     * @param num 一个长整型数据
     * @return 4个字节的自己数组
     */
    public static byte[] longToBytes(long num) {
        byte[] bytes = new byte[8];
        for (int i = 0; i < 8; i++) {
            bytes[i] = (byte) (0xff & (num >> (i * 8)));
        }

        return bytes;
    }

    /**
     * 大数字转换字节流（字节数组）型数据
     *
     * @param n
     * @return
     */
    public static byte[] byteConvert32Bytes(BigInteger n) {
        byte[] tmpd = null;
        if (n == null) {
            return null;
        }

        if (n.toByteArray().length == 33) {
            tmpd = new byte[32];
            System.arraycopy(n.toByteArray(), 1, tmpd, 0, 32);
        } else if (n.toByteArray().length == 32) {
            tmpd = n.toByteArray();
        } else {
            tmpd = new byte[32];
            for (int i = 0; i < 32 - n.toByteArray().length; i++) {
                tmpd[i] = 0;
            }
            System.arraycopy(n.toByteArray(), 0, tmpd, 32 - n.toByteArray().length, n.toByteArray().length);
        }
        return tmpd;
    }

    /**
     * 换字节流（字节数组）型数据转大数字
     *
     * @param b
     * @return
     */
    public static BigInteger byteConvertInteger(byte[] b) {
        if (b[0] < 0) {
            byte[] temp = new byte[b.length + 1];
            temp[0] = 0;
            System.arraycopy(b, 0, temp, 1, b.length);
            return new BigInteger(temp);
        }
        return new BigInteger(b);
    }

    /**
     * 根据字节数组获得值(十六进制数字)
     *
     * @param bytes
     * @return
     */
    public static String getHexString(byte[] bytes) {
        return getHexString(bytes, true);
    }

    /**
     * 根据字节数组获得值(十六进制数字)
     *
     * @param bytes
     * @param upperCase
     * @return
     */
    public static String getHexString(byte[] bytes, boolean upperCase) {
        String ret = "";
        for (int i = 0; i < bytes.length; i++) {
            ret += Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1);
        }
        return upperCase ? ret.toUpperCase() : ret;
    }

    /**
     * 打印十六进制字符串
     *
     * @param bytes
     */
    public static void printHexString(byte[] bytes) {
        for (int i = 0; i < bytes.length; i++) {
            String hex = Integer.toHexString(bytes[i] & 0xFF);
            if (hex.length() == 1) {
                hex = '0' + hex;
            }
            System.out.print("0x" + hex.toUpperCase() + ",");
        }
        System.out.println();
    }

    /**
     * Convert hex string to byte[]
     *
     * @param hexString the hex string
     * @return byte[]
     */
    public static byte[] hexStringToBytes(String hexString) {
        if (hexString == null || hexString.equals("")) {
            return null;
        }

        hexString = hexString.toUpperCase();
        int length = hexString.length() / 2;
        char[] hexChars = hexString.toCharArray();
        byte[] d = new byte[length];
        for (int i = 0; i < length; i++) {
            int pos = i * 2;
            d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
        }
        return d;
    }

    /**
     * Convert char to byte
     *
     * @param c char
     * @return byte
     */
    public static byte charToByte(char c) {
        return (byte) "0123456789ABCDEF".indexOf(c);
    }

    /**
     * 将字节数组转换为十六进制字符数组
     *
     * @param data byte[]
     * @return 十六进制char[]
     */
    public static char[] encodeHex(byte[] data) {
        return encodeHex(data, true);
    }

    /**
     * 将字节数组转换为十六进制字符数组
     *
     * @param data        byte[]
     * @param toLowerCase <code>true</code> 传换成小写格式 ， <code>false</code> 传换成大写格式
     * @return 十六进制char[]
     */
    public static char[] encodeHex(byte[] data, boolean toLowerCase) {
        return encodeHex(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
    }

    /**
     * 将字节数组转换为十六进制字符数组
     *
     * @param data     byte[]
     * @param toDigits 用于控制输出的char[]
     * @return 十六进制char[]
     */
    protected static char[] encodeHex(byte[] data, char[] toDigits) {
        int l = data.length;
        char[] out = new char[l << 1];
        // two characters form the hex value.
        for (int i = 0, j = 0; i < l; i++) {
            out[j++] = toDigits[(0xF0 & data[i]) >>> 4];
            out[j++] = toDigits[0x0F & data[i]];
        }
        return out;
    }

    /**
     * 将字节数组转换为十六进制字符串
     *
     * @param data byte[]
     * @return 十六进制String
     */
    public static String encodeHexString(byte[] data) {
        return encodeHexString(data, true);
    }

    /**
     * 将字节数组转换为十六进制字符串
     *
     * @param data        byte[]
     * @param toLowerCase <code>true</code> 传换成小写格式 ， <code>false</code> 传换成大写格式
     * @return 十六进制String
     */
    public static String encodeHexString(byte[] data, boolean toLowerCase) {
        return encodeHexString(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
    }

    /**
     * 将字节数组转换为十六进制字符串
     *
     * @param data     byte[]
     * @param toDigits 用于控制输出的char[]
     * @return 十六进制String
     */
    protected static String encodeHexString(byte[] data, char[] toDigits) {
        return new String(encodeHex(data, toDigits));
    }

    /**
     * 将十六进制字符数组转换为字节数组
     *
     * @param data 十六进制char[]
     * @return byte[]
     * @throws RuntimeException 如果源十六进制字符数组是一个奇怪的长度，将抛出运行时异常
     */
    public static byte[] decodeHex(char[] data) {
        int len = data.length;

        if ((len & 0x01) != 0) {
            throw new RuntimeException("Odd number of characters.");
        }

        byte[] out = new byte[len >> 1];

        // two characters form the hex value.
        for (int i = 0, j = 0; j < len; i++) {
            int f = toDigit(data[j], j) << 4;
            j++;
            f = f | toDigit(data[j], j);
            j++;
            out[i] = (byte) (f & 0xFF);
        }

        return out;
    }

    /**
     * 将十六进制字符转换成一个整数
     *
     * @param ch    十六进制char
     * @param index 十六进制字符在字符数组中的位置
     * @return 一个整数
     * @throws RuntimeException 当ch不是一个合法的十六进制字符时，抛出运行时异常
     */
    protected static int toDigit(char ch, int index) {
        int digit = Character.digit(ch, 16);
        if (digit == -1) {
            throw new RuntimeException("Illegal hexadecimal character " + ch
                    + " at index " + index);
        }
        return digit;
    }

    /**
     * 数字字符串转ASCII码字符串
     *
     * @param content 字符串
     * @return ASCII字符串
     */
    public static String StringToAsciiString(String content) {
        String result = "";
        int max = content.length();
        for (int i = 0; i < max; i++) {
            char c = content.charAt(i);
            String b = Integer.toHexString(c);
            result = result + b;
        }
        return result;
    }

    /**
     * 十六进制转字符串
     *
     * @param hexString  十六进制字符串
     * @param encodeType 编码类型4：Unicode，2：普通编码
     * @return 字符串
     */
    public static String hexStringToString(String hexString, int encodeType) {
        String result = "";
        int max = hexString.length() / encodeType;
        for (int i = 0; i < max; i++) {
            char c = (char) hexStringToAlgorism(hexString
                    .substring(i * encodeType, (i + 1) * encodeType));
            result += c;
        }
        return result;
    }

    /**
     * 十六进制字符串装十进制
     *
     * @param hex 十六进制字符串
     * @return 十进制数值
     */
    public static int hexStringToAlgorism(String hex) {
        hex = hex.toUpperCase();
        int max = hex.length();
        int result = 0;
        for (int i = max; i > 0; i--) {
            char c = hex.charAt(i - 1);
            int algorism = 0;
            if (c >= '0' && c <= '9') {
                algorism = c - '0';
            } else {
                algorism = c - 55;
            }
            result += Math.pow(16, max - i) * algorism;
        }
        return result;
    }

    /**
     * 十六转二进制
     *
     * @param hex 十六进制字符串
     * @return 二进制字符串
     */
    public static String hexStringToBinary(String hex) {
        hex = hex.toUpperCase();
        String result = "";
        int max = hex.length();
        for (int i = 0; i < max; i++) {
            char c = hex.charAt(i);
            switch (c) {
                case '0':
                    result += "0000";
                    break;
                case '1':
                    result += "0001";
                    break;
                case '2':
                    result += "0010";
                    break;
                case '3':
                    result += "0011";
                    break;
                case '4':
                    result += "0100";
                    break;
                case '5':
                    result += "0101";
                    break;
                case '6':
                    result += "0110";
                    break;
                case '7':
                    result += "0111";
                    break;
                case '8':
                    result += "1000";
                    break;
                case '9':
                    result += "1001";
                    break;
                case 'A':
                    result += "1010";
                    break;
                case 'B':
                    result += "1011";
                    break;
                case 'C':
                    result += "1100";
                    break;
                case 'D':
                    result += "1101";
                    break;
                case 'E':
                    result += "1110";
                    break;
                case 'F':
                    result += "1111";
                    break;
            }
        }
        return result;
    }

    /**
     * ASCII码字符串转数字字符串
     *
     * @param content ASCII字符串
     * @return 字符串
     */
    public static String AsciiStringToString(String content) {
        String result = "";
        int length = content.length() / 2;
        for (int i = 0; i < length; i++) {
            String c = content.substring(i * 2, i * 2 + 2);
            int a = hexStringToAlgorism(c);
            char b = (char) a;
            String d = String.valueOf(b);
            result += d;
        }
        return result;
    }

    /**
     * 将十进制转换为指定长度的十六进制字符串
     *
     * @param algorism  int 十进制数字
     * @param maxLength int 转换后的十六进制字符串长度
     * @return String 转换后的十六进制字符串
     */
    public static String algorismToHexString(int algorism, int maxLength) {
        String result = "";
        result = Integer.toHexString(algorism);

        if (result.length() % 2 == 1) {
            result = "0" + result;
        }
        return patchHexString(result.toUpperCase(), maxLength);
    }

    /**
     * 字节数组转为普通字符串（ASCII对应的字符）
     *
     * @param bytearray byte[]
     * @return String
     */
    public static String byteToString(byte[] bytearray) {
        String result = "";
        char temp;

        int length = bytearray.length;
        for (int i = 0; i < length; i++) {
            temp = (char) bytearray[i];
            result += temp;
        }
        return result;
    }

    /**
     * 二进制字符串转十进制
     *
     * @param binary 二进制字符串
     * @return 十进制数值
     */
    public static int binaryToAlgorism(String binary) {
        int max = binary.length();
        int result = 0;
        for (int i = max; i > 0; i--) {
            char c = binary.charAt(i - 1);
            int algorism = c - '0';
            result += Math.pow(2, max - i) * algorism;
        }
        return result;
    }

    /**
     * 十进制转换为十六进制字符串
     *
     * @param algorism int 十进制的数字
     * @return String 对应的十六进制字符串
     */
    public static String algorismToHEXString(int algorism) {
        String result = "";
        result = Integer.toHexString(algorism);

        if (result.length() % 2 == 1) {
            result = "0" + result;

        }
        result = result.toUpperCase();

        return result;
    }

    /**
     * HEX字符串前补0，主要用于长度位数不足。
     *
     * @param str       String 需要补充长度的十六进制字符串
     * @param maxLength int 补充后十六进制字符串的长度
     * @return 补充结果
     */
    static public String patchHexString(String str, int maxLength) {
        String temp = "";
        for (int i = 0; i < maxLength - str.length(); i++) {
            temp = "0" + temp;
        }
        str = (temp + str).substring(0, maxLength);
        return str;
    }

    /**
     * 将一个字符串转换为int
     *
     * @param s          String 要转换的字符串
     * @param defaultInt int 如果出现异常,默认返回的数字
     * @param radix      int 要转换的字符串是什么进制的,如16 8 10.
     * @return int 转换后的数字
     */
    public static int parseToInt(String s, int defaultInt, int radix) {
        int i = 0;
        try {
            i = Integer.parseInt(s, radix);
        } catch (NumberFormatException ex) {
            i = defaultInt;
        }
        return i;
    }

    /**
     * 将一个十进制形式的数字字符串转换为int
     *
     * @param s          String 要转换的字符串
     * @param defaultInt int 如果出现异常,默认返回的数字
     * @return int 转换后的数字
     */
    public static int parseToInt(String s, int defaultInt) {
        int i = 0;
        try {
            i = Integer.parseInt(s);
        } catch (NumberFormatException ex) {
            i = defaultInt;
        }
        return i;
    }

    /**
     * 十六进制串转化为byte数组
     *
     * @return the array of byte
     */
    public static byte[] hexToByte(String hex)
            throws IllegalArgumentException {
        if (hex.length() % 2 != 0) {
            throw new IllegalArgumentException();
        }
        char[] arr = hex.toCharArray();
        byte[] b = new byte[hex.length() / 2];
        for (int i = 0, j = 0, l = hex.length(); i < l; i++, j++) {
            String swap = "" + arr[i++] + arr[i];
            int byteint = Integer.parseInt(swap, 16) & 0xFF;
            b[j] = new Integer(byteint).byteValue();
        }
        return b;
    }

    /**
     * 字节数组转换为十六进制字符串
     *
     * @param b byte[] 需要转换的字节数组
     * @return String 十六进制字符串
     */
    public static String byteToHex(byte[] b) {
        if (b == null) {
            throw new IllegalArgumentException(
                    "Argument b ( byte array ) is null! ");
        }
        String hs = "";
        String stmp = "";
        for (int n = 0; n < b.length; n++) {
            stmp = Integer.toHexString(b[n] & 0xff);
            if (stmp.length() == 1) {
                hs = hs + "0" + stmp;
            } else {
                hs = hs + stmp;
            }
        }
        return hs.toUpperCase();
    }

    public static byte[] subByte(byte[] input, int startIndex, int length) {
        byte[] bt = new byte[length];
        for (int i = 0; i < length; i++) {
            bt[i] = input[i + startIndex];
        }
        return bt;
    }
}

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import java.math.BigInteger;

public class Util {

/**

* 用于建立十六进制字符的输出的小写字符数组

private static final char[] DIGITS_LOWER = {'0', '1', '2', '3', '4', '5',

'6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};

/**

* 用于建立十六进制字符的输出的大写字符数组

private static final char[] DIGITS_UPPER = {'0', '1', '2', '3', '4', '5',

'6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};

/**

* 整形转换成网络传输的字节流（字节数组）型数据

* @param num 一个整型数据

* @return 4个字节的自己数组

public static byte[] intToBytes(int num) {

byte[] bytes = new byte[4];

bytes[0] = (byte) (0xff & (num >> 0));

bytes[1] = (byte) (0xff & (num >> 8));

bytes[2] = (byte) (0xff & (num >> 16));

bytes[3] = (byte) (0xff & (num >> 24));

return bytes;

}

/**

* 四个字节的字节数据转换成一个整形数据

* @param bytes 4个字节的字节数组

* @return 一个整型数据

public static int byteToInt(byte[] bytes) {

int num = 0;

int temp;

temp = (0x000000ff & (bytes[0])) << 0;

num = num | temp;

temp = (0x000000ff & (bytes[1])) << 8;

num = num | temp;

temp = (0x000000ff & (bytes[2])) << 16;

num = num | temp;

temp = (0x000000ff & (bytes[3])) << 24;

num = num | temp;

return num;

}

/**

* 长整形转换成网络传输的字节流（字节数组）型数据

* @param num 一个长整型数据

* @return 4个字节的自己数组

public static byte[] longToBytes(long num) {

byte[] bytes = new byte[8];

for (int i = 0; i < 8; i++) {

bytes[i] = (byte) (0xff & (num >> (i * 8)));

}

return bytes;

}

/**

* 大数字转换字节流（字节数组）型数据

* @param n

* @return

public static byte[] byteConvert32Bytes(BigInteger n) {

byte[] tmpd = null;

if (n == null) {

return null;

}

if (n.toByteArray().length == 33) {

tmpd = new byte[32];

System.arraycopy(n.toByteArray(), 1, tmpd, 0, 32);

} else if (n.toByteArray().length == 32) {

tmpd = n.toByteArray();

} else {

tmpd = new byte[32];

for (int i = 0; i < 32 - n.toByteArray().length; i++) {

tmpd[i] = 0;

}

System.arraycopy(n.toByteArray(), 0, tmpd, 32 - n.toByteArray().length, n.toByteArray().length);

}

return tmpd;

}

/**

* 换字节流（字节数组）型数据转大数字

* @param b

* @return

public static BigInteger byteConvertInteger(byte[] b) {

if (b[0] < 0) {

byte[] temp = new byte[b.length + 1];

temp[0] = 0;

System.arraycopy(b, 0, temp, 1, b.length);

return new BigInteger(temp);

}

return new BigInteger(b);

}

/**

* 根据字节数组获得值(十六进制数字)

* @param bytes

* @return

public static String getHexString(byte[] bytes) {

return getHexString(bytes, true);

}

/**

* 根据字节数组获得值(十六进制数字)

* @param bytes

* @param upperCase

* @return

public static String getHexString(byte[] bytes, boolean upperCase) {

String ret = "";

for (int i = 0; i < bytes.length; i++) {

ret += Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1);

}

return upperCase ? ret.toUpperCase() : ret;

}

/**

* 打印十六进制字符串

* @param bytes

public static void printHexString(byte[] bytes) {

for (int i = 0; i < bytes.length; i++) {

String hex = Integer.toHexString(bytes[i] & 0xFF);

if (hex.length() == 1) {

hex = '0' + hex;

}

System.out.print("0x" + hex.toUpperCase() + ",");

}

System.out.println();

}

/**

* Convert hex string to byte[]

* @param hexString the hex string

* @return byte[]

public static byte[] hexStringToBytes(String hexString) {

if (hexString == null || hexString.equals("")) {

return null;

}

hexString = hexString.toUpperCase();

int length = hexString.length() / 2;

char[] hexChars = hexString.toCharArray();

byte[] d = new byte[length];

for (int i = 0; i < length; i++) {

int pos = i * 2;

d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));

}

return d;

}

/**

* Convert char to byte

* @param c char

* @return byte

public static byte charToByte(char c) {

return (byte) "0123456789ABCDEF".indexOf(c);

}

/**

* 将字节数组转换为十六进制字符数组

* @param data byte[]

* @return 十六进制char[]

public static char[] encodeHex(byte[] data) {

return encodeHex(data, true);

}

/**

* 将字节数组转换为十六进制字符数组

* @param data byte[]

* @param toLowerCase <code>true</code> 传换成小写格式， <code>false</code> 传换成大写格式

* @return 十六进制char[]

public static char[] encodeHex(byte[] data, boolean toLowerCase) {

return encodeHex(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);

}

/**

* 将字节数组转换为十六进制字符数组

* @param data byte[]

* @param toDigits 用于控制输出的char[]

* @return 十六进制char[]

protected static char[] encodeHex(byte[] data, char[] toDigits) {

int l = data.length;

char[] out = new char[l << 1];

// two characters form the hex value.

for (int i = 0, j = 0; i < l; i++) {

out[j++] = toDigits[(0xF0 & data[i]) >>> 4];

out[j++] = toDigits[0x0F & data[i]];

}

return out;

}

/**

* 将字节数组转换为十六进制字符串

* @param data byte[]

* @return 十六进制String

public static String encodeHexString(byte[] data) {

return encodeHexString(data, true);

}

/**

* 将字节数组转换为十六进制字符串

* @param data byte[]

* @param toLowerCase <code>true</code> 传换成小写格式， <code>false</code> 传换成大写格式

* @return 十六进制String

public static String encodeHexString(byte[] data, boolean toLowerCase) {

return encodeHexString(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);

}

/**

* 将字节数组转换为十六进制字符串

* @param data byte[]

* @param toDigits 用于控制输出的char[]

* @return 十六进制String

protected static String encodeHexString(byte[] data, char[] toDigits) {

return new String(encodeHex(data, toDigits));

}

/**

* 将十六进制字符数组转换为字节数组

* @param data 十六进制char[]

* @return byte[]

* @throws RuntimeException 如果源十六进制字符数组是一个奇怪的长度，将抛出运行时异常

public static byte[] decodeHex(char[] data) {

int len = data.length;

if ((len & 0x01) != 0) {

throw new RuntimeException("Odd number of characters.");

}

byte[] out = new byte[len >> 1];

// two characters form the hex value.

for (int i = 0, j = 0; j < len; i++) {

int f = toDigit(data[j], j) << 4;

j++;

f = f | toDigit(data[j], j);

j++;

out[i] = (byte) (f & 0xFF);

}

return out;

}

/**

* 将十六进制字符转换成一个整数

* @param ch 十六进制char

* @param index 十六进制字符在字符数组中的位置

* @return 一个整数

* @throws RuntimeException 当ch不是一个合法的十六进制字符时，抛出运行时异常

protected static int toDigit(char ch, int index) {

int digit = Character.digit(ch, 16);

if (digit == -1) {

throw new RuntimeException("Illegal hexadecimal character " + ch

+ " at index " + index);

}

return digit;

}

/**

* 数字字符串转ASCII码字符串

* @param content 字符串

* @return ASCII字符串

public static String StringToAsciiString(String content) {

String result = "";

int max = content.length();

for (int i = 0; i < max; i++) {

char c = content.charAt(i);

String b = Integer.toHexString(c);

result = result + b;

}

return result;

}

/**

* 十六进制转字符串

* @param hexString 十六进制字符串

* @param encodeType 编码类型4：Unicode，2：普通编码

* @return 字符串

public static String hexStringToString(String hexString, int encodeType) {

String result = "";

int max = hexString.length() / encodeType;

for (int i = 0; i < max; i++) {

char c = (char) hexStringToAlgorism(hexString

.substring(i * encodeType, (i + 1) * encodeType));

result += c;

}

return result;

}

/**

* 十六进制字符串装十进制

* @param hex 十六进制字符串

* @return 十进制数值

public static int hexStringToAlgorism(String hex) {

hex = hex.toUpperCase();

int max = hex.length();

int result = 0;

for (int i = max; i > 0; i--) {

char c = hex.charAt(i - 1);

int algorism = 0;

if (c >= '0' && c <= '9') {

algorism = c - '0';

} else {

algorism = c - 55;

}

result += Math.pow(16, max - i) * algorism;

}

return result;

}

/**

* 十六转二进制

* @param hex 十六进制字符串

* @return 二进制字符串

public static String hexStringToBinary(String hex) {

hex = hex.toUpperCase();

String result = "";

int max = hex.length();

for (int i = 0; i < max; i++) {

char c = hex.charAt(i);

switch (c) {

case '0':

result += "0000";

break;

case '1':

result += "0001";

break;

case '2':

result += "0010";

break;

case '3':

result += "0011";

break;

case '4':

result += "0100";

break;

case '5':

result += "0101";

break;

case '6':

result += "0110";

break;

case '7':

result += "0111";

break;

case '8':

result += "1000";

break;

case '9':

result += "1001";

break;

case 'A':

result += "1010";

break;

case 'B':

result += "1011";

break;

case 'C':

result += "1100";

break;

case 'D':

result += "1101";

break;

case 'E':

result += "1110";

break;

case 'F':

result += "1111";

break;

}

return result;

}

/**

* ASCII码字符串转数字字符串

* @param content ASCII字符串

* @return 字符串

public static String AsciiStringToString(String content) {

String result = "";

int length = content.length() / 2;

for (int i = 0; i < length; i++) {

String c = content.substring(i * 2, i * 2 + 2);

int a = hexStringToAlgorism(c);

char b = (char) a;

String d = String.valueOf(b);

result += d;

}

return result;

}

/**

* 将十进制转换为指定长度的十六进制字符串

* @param algorism int 十进制数字

* @param maxLength int 转换后的十六进制字符串长度

* @return String 转换后的十六进制字符串

public static String algorismToHexString(int algorism, int maxLength) {

String result = "";

result = Integer.toHexString(algorism);

if (result.length() % 2 == 1) {

result = "0" + result;

}

return patchHexString(result.toUpperCase(), maxLength);

}

/**

* 字节数组转为普通字符串（ASCII对应的字符）

* @param bytearray byte[]

* @return String

public static String byteToString(byte[] bytearray) {

String result = "";

char temp;

int length = bytearray.length;

for (int i = 0; i < length; i++) {

temp = (char) bytearray[i];

result += temp;

}

return result;

}

/**

* 二进制字符串转十进制

* @param binary 二进制字符串

* @return 十进制数值

public static int binaryToAlgorism(String binary) {

int max = binary.length();

int result = 0;

for (int i = max; i > 0; i--) {

char c = binary.charAt(i - 1);

int algorism = c - '0';

result += Math.pow(2, max - i) * algorism;

}

return result;

}

/**

* 十进制转换为十六进制字符串

* @param algorism int 十进制的数字

* @return String 对应的十六进制字符串

public static String algorismToHEXString(int algorism) {

String result = "";

result = Integer.toHexString(algorism);

if (result.length() % 2 == 1) {

result = "0" + result;

}

result = result.toUpperCase();

return result;

}

/**

* HEX字符串前补0，主要用于长度位数不足。

* @param str String 需要补充长度的十六进制字符串

* @param maxLength int 补充后十六进制字符串的长度

* @return 补充结果

static public String patchHexString(String str, int maxLength) {

String temp = "";

for (int i = 0; i < maxLength - str.length(); i++) {

temp = "0" + temp;

}

str = (temp + str).substring(0, maxLength);

return str;

}

/**

* 将一个字符串转换为int

* @param s String 要转换的字符串

* @param defaultInt int 如果出现异常,默认返回的数字

* @param radix int 要转换的字符串是什么进制的,如16 8 10.

* @return int 转换后的数字

public static int parseToInt(String s, int defaultInt, int radix) {

int i = 0;

try {

i = Integer.parseInt(s, radix);

} catch (NumberFormatException ex) {

i = defaultInt;

}

return i;

}

/**

* 将一个十进制形式的数字字符串转换为int

* @param s String 要转换的字符串

* @param defaultInt int 如果出现异常,默认返回的数字

* @return int 转换后的数字

public static int parseToInt(String s, int defaultInt) {

int i = 0;

try {

i = Integer.parseInt(s);

} catch (NumberFormatException ex) {

i = defaultInt;

}

return i;

}

/**

* 十六进制串转化为byte数组

* @return the array of byte

public static byte[] hexToByte(String hex)

throws IllegalArgumentException {

if (hex.length() % 2 != 0) {

throw new IllegalArgumentException();

}

char[] arr = hex.toCharArray();

byte[] b = new byte[hex.length() / 2];

for (int i = 0, j = 0, l = hex.length(); i < l; i++, j++) {

String swap = "" + arr[i++] + arr[i];

int byteint = Integer.parseInt(swap, 16) & 0xFF;

b[j] = new Integer(byteint).byteValue();

}

return b;

}

/**

* 字节数组转换为十六进制字符串

* @param b byte[] 需要转换的字节数组

* @return String 十六进制字符串

public static String byteToHex(byte[] b) {

if (b == null) {

throw new IllegalArgumentException(

"Argument b ( byte array ) is null! ");

}

String hs = "";

String stmp = "";

for (int n = 0; n < b.length; n++) {

stmp = Integer.toHexString(b[n] & 0xff);

if (stmp.length() == 1) {

hs = hs + "0" + stmp;

} else {

hs = hs + stmp;

}

return hs.toUpperCase();

}

public static byte[] subByte(byte[] input, int startIndex, int length) {

byte[] bt = new byte[length];

for (int i = 0; i < length; i++) {

bt[i] = input[i + startIndex];

}

return bt;

}

注意：

根据国密推荐的SM2椭圆曲线公钥密码算法，首先产生随机数计算出曲线点C1，2个32byte的BIGNUM大数，即为SM2加密结果的第1部分（C1）。第2部分则是真正的密文，是对明文的加密结果，长度和明文一样（C2）。第3部分是杂凑值，用来效验数据（C3）。按国密推荐的256位椭圆曲线，明文加密结果比原长度会大97byte（C1使用EC_POINT_point2oct转换）。

我们可以利用 密文，长度和明文一样（C2）这个原理，来跟踪现实中的调试问题，我们在没办法解密用户输入数据的内容的情况下，可以知道用户输入内容的长度，也能辅助我们解决很多调试问题。

上述的代码还可参考 Java—bouncycastle支持国密SM2的公钥加密算法

参考链接

Android项目如何只在单元测试时引入特定libs/jar/aar

正常情况下Android项目需要的jar包，我们可以通过放置到项目对应的libs目录下即可。但是如果我们只希望某些特定libs/jar/aar只在执行单元测试时引入，那么应该怎么处理呢？

在Android Studio 4.1.x及以上版本，build tools 4.1.x及以上版本的情况下（较低的版本可能不支持这些配置项），我们可以通过使用 androidTestImplementation fileTree的方式进行引入(同理常规单元测试使用 testImplementation fileTree)，如下：

apply plugin: 'android'

dependencies {
    implementation project(':android-sdk')

    // The libs folder is included in the apk of the real app
    Implementation fileTree(dir: 'libs', include: '*.jar')

    // The tests-libs folder is included only for tests
    androidTestImplementation fileTree(dir: 'libs-tests', include: '*.jar')
}


android {
    compileSdkVersion 19
    buildToolsVersion "20.0.0"

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7
    }


    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            resources.srcDirs = ['src']
            aidl.srcDirs = ['src']
            renderscript.srcDirs = ['src']
            res.srcDirs = ['res']
            assets.srcDirs = ['assets']
        }

        // Move the tests to tests/java, tests/res, etc...
        androidTest.setRoot('tests')

        // Note - to run the tests from command line:
        // $ gradle clean connectedCheck build
        // (requires gradle 1.10)

        // Move the build types to build-types/<type>
        // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
        // This moves them out of them default location under src/<type>/... which would
        // conflict with src/ being used by the main source set.
        // Adding new build types or product flavors should be accompanied
        // by a similar customization.
        debug.setRoot('build-types/debug')
        release.setRoot('build-types/release')
    }
}

apply plugin: 'android'

dependencies {

implementation project(':android-sdk')

// The libs folder is included in the apk of the real app

Implementation fileTree(dir: 'libs', include: '*.jar')

// The tests-libs folder is included only for tests

androidTestImplementation fileTree(dir: 'libs-tests', include: '*.jar')

}

android {

compileSdkVersion 19

buildToolsVersion "20.0.0"

compileOptions {

sourceCompatibility JavaVersion.VERSION_1_7

targetCompatibility JavaVersion.VERSION_1_7

}

sourceSets {

main {

manifest.srcFile 'AndroidManifest.xml'

java.srcDirs = ['src']

resources.srcDirs = ['src']

aidl.srcDirs = ['src']

renderscript.srcDirs = ['src']

res.srcDirs = ['res']

assets.srcDirs = ['assets']

}

// Move the tests to tests/java, tests/res, etc...

androidTest.setRoot('tests')

// Note - to run the tests from command line:

// $ gradle clean connectedCheck build

// (requires gradle 1.10)

// Move the build types to build-types/<type>

// For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...

// This moves them out of them default location under src/<type>/... which would

// conflict with src/ being used by the main source set.

// Adding new build types or product flavors should be accompanied

// by a similar customization.

debug.setRoot('build-types/debug')

release.setRoot('build-types/release')

}

参考链接

Thymeleaf公共css,js提取及自有css,js导入

之前参考网上的各种方法，均为达到期望的效果，于是到Thymeleaf 官网逛了下，找到官网的例子来实现了：

以fragment方式分离公有css和js，
以replace+参数的方式传入每个页面单独的css和js.

1 2	以fragment方式分离公有css和js，以replace+参数的方式传入每个页面单独的css和js.

直接上栗子：

公有css(存放在templates/common/htmlHead.html中):

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head th:fragment="common_header(title,links)">
    <!-- Common styles and scripts -->
    <title th:replace="${title}">The awesome application</title>
    <meta charset="utf-8"></meta>
    <meta http-equiv="X-UA-Compatible" content="IE=edge"></meta>
    <meta name="renderer" content="webkit" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0"></meta>
    <meta name="description" content=""></meta>
    <meta name="author" content=""></meta>
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"></meta>
    <link rel="icon" href="/img/icon.ico" type="image/x-icon" />

    <link rel="shortcut icon" href="/favicon.ico" />
    <link th:href="@{/webjars/bootstrap/3.3.7/dist/css/bootstrap.css}" rel="stylesheet">
    <link href="css/common/top_header.css" rel="stylesheet">
    <link href="css/common/bottom_footer.css" rel="stylesheet">
    <!--<link th:href="${myCss}" rel="stylesheet">-->
    <link th:href="@{/webjars/cropper/2.3.4/dist/cropper.css}" rel="stylesheet">
    <link href="css/common/rspMsg.css" rel="stylesheet">
    <link href="css/common/common.css" rel="stylesheet">

    <!--/* Per-page placeholder for additional links */-->
    <th:block th:replace="${links}" />
</head>

公有css(存放在templates/common/htmlHead.html中):

<!DOCTYPE html>

<title th:replace="${title}">The awesome application</title>

<th:block th:replace="${links}" />

</head>

一般页面调用公有CSS，并使用自己的CSS:

<!DOCTYPE html>
<html lang="zh-CN">
<head th:replace="common/htmlHead :: common_header(~{::title},~{::link})">
    <title>设置</title>
    <link rel="stylesheet" href="css/index.css">
</head>
</html>

<!DOCTYPE html>

</head>

</html>

公有js的提取方式是一样的：

<!DOCTYPE html>
<html lang="zh-CN">
<div th:fragment="common_js(scripts)">
    <script th:src="@{/webjars/vue/2.3.4/dist/vue.js}"></script>
    <script th:src="@{/webjars/vue-resource/1.3.1/dist/vue-resource.js}"></script>
    <script th:src="@{/webjars/jquery/3.2.1/dist/jquery.js}"></script>
    <script th:src="@{/webjars/tether/1.4.0/js/tether.js}"></script>
    <script th:src="@{/webjars/bootstrap/3.3.7/dist/js/bootstrap.js}"></script>
    <script th:src="@{/webjars/cropper/2.3.4/dist/cropper.js}"></script>
    <script src="js/common/top_header.js"></script>
    <script src="js/common/common.js"></script>

    <!--/* Per-page placeholder for additional js */-->
    <th:block th:replace="${scripts}" />
</div>
</html>

<!DOCTYPE html>

<th:block th:replace="${scripts}" />

</div>

</html>

公有JS的使用包一层DIV即可：

......
<body>
......

<!--使用公有js-->
<div th:replace="common/htmlJS::common_js(~{::script})">
    <!--每个页面自己的js-->
    <script src="js/index.js"></script>
</div>
</body>
</html>

......

<body>

......

</div>

</body>

</html>

测试结果可用，具体解释请参考Thymeleaf官方文档

注意，上述的配置在引入的是，会多出来一个DIV标签，如果想去掉这个标签，可以使用如下方式声明以及引用

<!DOCTYPE html>
<html lang="zh-CN">
<th:block th:fragment="common_js(scripts)">
    <script th:src="@{/webjars/vue/2.3.4/dist/vue.js}"></script>
    <script th:src="@{/webjars/vue-resource/1.3.1/dist/vue-resource.js}"></script>
    <script th:src="@{/webjars/jquery/3.2.1/dist/jquery.js}"></script>
    <script th:src="@{/webjars/tether/1.4.0/js/tether.js}"></script>
    <script th:src="@{/webjars/bootstrap/3.3.7/dist/js/bootstrap.js}"></script>
    <script th:src="@{/webjars/cropper/2.3.4/dist/cropper.js}"></script>
    <script src="js/common/top_header.js"></script>
    <script src="js/common/common.js"></script>

    <!--/* Per-page placeholder for additional js */-->
    <th:block th:replace="${scripts}" />
</th:block>
</html>

<!DOCTYPE html>

<th:block th:fragment="common_js(scripts)">

<th:block th:replace="${scripts}" />

</th:block>

</html>

公有JS的使用包一层th:block即可：

......
<body>
......

<!--使用公有js-->
<th:block th:replace="common/htmlJS::common_js(~{::script})">
    <!--每个页面自己的js-->
    <script src="js/index.js"></script>
</th:block>
</body>
</html>

......

<body>

......

<th:block th:replace="common/htmlJS::common_js(~{::script})">

</th:block>

</body>

</html>

另外如果使用的SpringBoot版本是1.5.4，默认的thymeleaf不是3.0版本，上面的测试需要thymeleaf 3.0版本才可以，需要修改下pom.xml文件，添加以下配置即可：

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <!-- set thymeleaf version -->
        <thymeleaf.version>3.0.0.RELEASE</thymeleaf.version>
        <thymeleaf-layout-dialect.version>2.0.0</thymeleaf-layout-dialect.version>
    </properties>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

<java.version>1.8</java.version>

<thymeleaf.version>3.0.0.RELEASE</thymeleaf.version>

<thymeleaf-layout-dialect.version>2.0.0</thymeleaf-layout-dialect.version>

</properties>

另外如果使用的SpringBoot版本是2.5.0，则不需要任何修改，直接可以生效。

参考链接

Python编写AES加密代码

最近需要 Python 实现 AES 加解密操作，在目前的 macOS Big Sur (11.4) 上使用 PyCryptodome 或 PyCrypto 都会报错：

ImportError: No module named 'Crypto'

1	ImportError: No module named 'Crypto'

经过测试，我们可以使用 cryptography 来实现这个功能，如下：

>>> import os
>>> from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
>>> key = os.urandom(32)
>>> iv = os.urandom(16)
>>> cipher = Cipher(algorithms.AES(key), modes.CBC(iv))
>>> encryptor = cipher.encryptor()
>>> ct = encryptor.update(b"a secret message") + encryptor.finalize()
>>> decryptor = cipher.decryptor()
>>> decryptor.update(ct) + decryptor.finalize()
b'a secret message'

>>> import os

>>> from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes

>>> key = os.urandom(32)

>>> iv = os.urandom(16)

>>> cipher = Cipher(algorithms.AES(key), modes.CBC(iv))

>>> encryptor = cipher.encryptor()

>>> ct = encryptor.update(b"a secret message") + encryptor.finalize()

>>> decryptor = cipher.decryptor()

>>> decryptor.update(ct) + decryptor.finalize()

b'a secret message'

参考 AES 算法实现代码：

#!/usr/bin/python
#
# aes.py: implements AES - Advanced Encryption Standard
# from the SlowAES project, http://code.google.com/p/slowaes/
#
# Copyright (c) 2008    Josh Davis ( http://www.josh-davis.org ),
#           Alex Martelli ( http://www.aleax.it )
#
# Ported from C code written by Laurent Haan ( http://www.progressive-coding.com )
#
# Licensed under the Apache License, Version 2.0
# http://www.apache.org/licenses/
#
import os
import sys
import math

class AES(object):
    '''AES funtions for a single block
    '''
    # Very annoying code:  all is for an object, but no state is kept!
    # Should just be plain functions in a AES modlule.
    
    # valid key sizes
    keySize = dict(SIZE_128=16, SIZE_192=24, SIZE_256=32)

    # Rijndael S-box
    sbox =  [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67,
            0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59,
            0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7,
            0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1,
            0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05,
            0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83,
            0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29,
            0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b,
            0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa,
            0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c,
            0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc,
            0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec,
            0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19,
            0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee,
            0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49,
            0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
            0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4,
            0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6,
            0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70,
            0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9,
            0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e,
            0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1,
            0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0,
            0x54, 0xbb, 0x16]

    # Rijndael Inverted S-box
    rsbox = [0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3,
            0x9e, 0x81, 0xf3, 0xd7, 0xfb , 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f,
            0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb , 0x54,
            0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b,
            0x42, 0xfa, 0xc3, 0x4e , 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24,
            0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25 , 0x72, 0xf8,
            0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d,
            0x65, 0xb6, 0x92 , 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda,
            0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84 , 0x90, 0xd8, 0xab,
            0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3,
            0x45, 0x06 , 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1,
            0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b , 0x3a, 0x91, 0x11, 0x41,
            0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6,
            0x73 , 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9,
            0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e , 0x47, 0xf1, 0x1a, 0x71, 0x1d,
            0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b ,
            0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0,
            0xfe, 0x78, 0xcd, 0x5a, 0xf4 , 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07,
            0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f , 0x60,
            0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f,
            0x93, 0xc9, 0x9c, 0xef , 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5,
            0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61 , 0x17, 0x2b,
            0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55,
            0x21, 0x0c, 0x7d]

    def getSBoxValue(self,num):
        """Retrieves a given S-Box Value"""
        return self.sbox[num]

    def getSBoxInvert(self,num):
        """Retrieves a given Inverted S-Box Value"""
        return self.rsbox[num]

    def rotate(self, word):
        """ Rijndael's key schedule rotate operation.

        Rotate a word eight bits to the left: eg, rotate(1d2c3a4f) == 2c3a4f1d
        Word is an char list of size 4 (32 bits overall).
        """
        return word[1:] + word[:1]

    # Rijndael Rcon
    Rcon = [0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36,
            0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97,
            0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72,
            0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66,
            0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04,
            0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d,
            0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3,
            0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61,
            0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a,
            0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40,
            0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc,
            0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5,
            0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a,
            0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d,
            0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c,
            0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35,
            0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4,
            0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc,
            0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08,
            0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a,
            0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d,
            0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2,
            0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74,
            0xe8, 0xcb ]

    def getRconValue(self, num):
        """Retrieves a given Rcon Value"""
        return self.Rcon[num]

    def core(self, word, iteration):
        """Key schedule core."""
        # rotate the 32-bit word 8 bits to the left
        word = self.rotate(word)
        # apply S-Box substitution on all 4 parts of the 32-bit word
        for i in range(4):
            word[i] = self.getSBoxValue(word[i])
        # XOR the output of the rcon operation with i to the first part
        # (leftmost) only
        word[0] = word[0] ^ self.getRconValue(iteration)
        return word

    def expandKey(self, key, size, expandedKeySize):
        """Rijndael's key expansion.

        Expands an 128,192,256 key into an 176,208,240 bytes key

        expandedKey is a char list of large enough size,
        key is the non-expanded key.
        """
        # current expanded keySize, in bytes
        currentSize = 0
        rconIteration = 1
        expandedKey = [0] * expandedKeySize

        # set the 16, 24, 32 bytes of the expanded key to the input key
        for j in range(size):
            expandedKey[j] = key[j]
        currentSize += size

        while currentSize < expandedKeySize:
            # assign the previous 4 bytes to the temporary value t
            t = expandedKey[currentSize-4:currentSize]

            # every 16,24,32 bytes we apply the core schedule to t
            # and increment rconIteration afterwards
            if currentSize % size == 0:
                t = self.core(t, rconIteration)
                rconIteration += 1
            # For 256-bit keys, we add an extra sbox to the calculation
            if size == self.keySize["SIZE_256"] and ((currentSize % size) == 16):
                for l in range(4): t[l] = self.getSBoxValue(t[l])

            # We XOR t with the four-byte block 16,24,32 bytes before the new
            # expanded key.  This becomes the next four bytes in the expanded
            # key.
            for m in range(4):
                expandedKey[currentSize] = expandedKey[currentSize - size] ^ \
                        t[m]
                currentSize += 1

        return expandedKey

    def addRoundKey(self, state, roundKey):
        """Adds (XORs) the round key to the state."""
        for i in range(16):
            state[i] ^= roundKey[i]
        return state

    def createRoundKey(self, expandedKey, roundKeyPointer):
        """Create a round key.
        Creates a round key from the given expanded key and the
        position within the expanded key.
        """
        roundKey = [0] * 16
        for i in range(4):
            for j in range(4):
                roundKey[j*4+i] = expandedKey[roundKeyPointer + i*4 + j]
        return roundKey

    def galois_multiplication(self, a, b):
        """Galois multiplication of 8 bit characters a and b."""
        p = 0
        for counter in range(8):
            if b & 1: p ^= a
            hi_bit_set = a & 0x80
            a <<= 1
            # keep a 8 bit
            a &= 0xFF
            if hi_bit_set:
                a ^= 0x1b
            b >>= 1
        return p

    #
    # substitute all the values from the state with the value in the SBox
    # using the state value as index for the SBox
    #
    def subBytes(self, state, isInv):
        if isInv: getter = self.getSBoxInvert
        else: getter = self.getSBoxValue
        for i in range(16): state[i] = getter(state[i])
        return state

    # iterate over the 4 rows and call shiftRow() with that row
    def shiftRows(self, state, isInv):
        for i in range(4):
            state = self.shiftRow(state, i*4, i, isInv)
        return state

    # each iteration shifts the row to the left by 1
    def shiftRow(self, state, statePointer, nbr, isInv):
        for i in range(nbr):
            if isInv:
                state[statePointer:statePointer+4] = \
                        state[statePointer+3:statePointer+4] + \
                        state[statePointer:statePointer+3]
            else:
                state[statePointer:statePointer+4] = \
                        state[statePointer+1:statePointer+4] + \
                        state[statePointer:statePointer+1]
        return state

    # galois multiplication of the 4x4 matrix
    def mixColumns(self, state, isInv):
        # iterate over the 4 columns
        for i in range(4):
            # construct one column by slicing over the 4 rows
            column = state[i:i+16:4]
            # apply the mixColumn on one column
            column = self.mixColumn(column, isInv)
            # put the values back into the state
            state[i:i+16:4] = column

        return state

    # galois multiplication of 1 column of the 4x4 matrix
    def mixColumn(self, column, isInv):
        if isInv: mult = [14, 9, 13, 11]
        else: mult = [2, 1, 1, 3]
        cpy = list(column)
        g = self.galois_multiplication

        column[0] = g(cpy[0], mult[0]) ^ g(cpy[3], mult[1]) ^ \
                    g(cpy[2], mult[2]) ^ g(cpy[1], mult[3])
        column[1] = g(cpy[1], mult[0]) ^ g(cpy[0], mult[1]) ^ \
                    g(cpy[3], mult[2]) ^ g(cpy[2], mult[3])
        column[2] = g(cpy[2], mult[0]) ^ g(cpy[1], mult[1]) ^ \
                    g(cpy[0], mult[2]) ^ g(cpy[3], mult[3])
        column[3] = g(cpy[3], mult[0]) ^ g(cpy[2], mult[1]) ^ \
                    g(cpy[1], mult[2]) ^ g(cpy[0], mult[3])
        return column

    # applies the 4 operations of the forward round in sequence
    def aes_round(self, state, roundKey):
        state = self.subBytes(state, False)
        state = self.shiftRows(state, False)
        state = self.mixColumns(state, False)
        state = self.addRoundKey(state, roundKey)
        return state

    # applies the 4 operations of the inverse round in sequence
    def aes_invRound(self, state, roundKey):
        state = self.shiftRows(state, True)
        state = self.subBytes(state, True)
        state = self.addRoundKey(state, roundKey)
        state = self.mixColumns(state, True)
        return state

    # Perform the initial operations, the standard round, and the final
    # operations of the forward aes, creating a round key for each round
    def aes_main(self, state, expandedKey, nbrRounds):
        state = self.addRoundKey(state, self.createRoundKey(expandedKey, 0))
        i = 1
        while i < nbrRounds:
            state = self.aes_round(state,
                                   self.createRoundKey(expandedKey, 16*i))
            i += 1
        state = self.subBytes(state, False)
        state = self.shiftRows(state, False)
        state = self.addRoundKey(state,
                                 self.createRoundKey(expandedKey, 16*nbrRounds))
        return state

    # Perform the initial operations, the standard round, and the final
    # operations of the inverse aes, creating a round key for each round
    def aes_invMain(self, state, expandedKey, nbrRounds):
        state = self.addRoundKey(state,
                                 self.createRoundKey(expandedKey, 16*nbrRounds))
        i = nbrRounds - 1
        while i > 0:
            state = self.aes_invRound(state,
                                      self.createRoundKey(expandedKey, 16*i))
            i -= 1
        state = self.shiftRows(state, True)
        state = self.subBytes(state, True)
        state = self.addRoundKey(state, self.createRoundKey(expandedKey, 0))
        return state

    # encrypts a 128 bit input block against the given key of size specified
    def encrypt(self, iput, key, size):
        output = [0] * 16
        # the number of rounds
        nbrRounds = 0
        # the 128 bit block to encode
        block = [0] * 16
        # set the number of rounds
        if size == self.keySize["SIZE_128"]: nbrRounds = 10
        elif size == self.keySize["SIZE_192"]: nbrRounds = 12
        elif size == self.keySize["SIZE_256"]: nbrRounds = 14
        else: return None

        # the expanded keySize
        expandedKeySize = 16*(nbrRounds+1)

        # Set the block values, for the block:
        # a0,0 a0,1 a0,2 a0,3
        # a1,0 a1,1 a1,2 a1,3
        # a2,0 a2,1 a2,2 a2,3
        # a3,0 a3,1 a3,2 a3,3
        # the mapping order is a0,0 a1,0 a2,0 a3,0 a0,1 a1,1 ... a2,3 a3,3
        #
        # iterate over the columns
        for i in range(4):
            # iterate over the rows
            for j in range(4):
                block[(i+(j*4))] = iput[(i*4)+j]

        # expand the key into an 176, 208, 240 bytes key
        # the expanded key
        expandedKey = self.expandKey(key, size, expandedKeySize)

        # encrypt the block using the expandedKey
        block = self.aes_main(block, expandedKey, nbrRounds)

        # unmap the block again into the output
        for k in range(4):
            # iterate over the rows
            for l in range(4):
                output[(k*4)+l] = block[(k+(l*4))]
        return output

    # decrypts a 128 bit input block against the given key of size specified
    def decrypt(self, iput, key, size):
        output = [0] * 16
        # the number of rounds
        nbrRounds = 0
        # the 128 bit block to decode
        block = [0] * 16
        # set the number of rounds
        if size == self.keySize["SIZE_128"]: nbrRounds = 10
        elif size == self.keySize["SIZE_192"]: nbrRounds = 12
        elif size == self.keySize["SIZE_256"]: nbrRounds = 14
        else: return None

        # the expanded keySize
        expandedKeySize = 16*(nbrRounds+1)

        # Set the block values, for the block:
        # a0,0 a0,1 a0,2 a0,3
        # a1,0 a1,1 a1,2 a1,3
        # a2,0 a2,1 a2,2 a2,3
        # a3,0 a3,1 a3,2 a3,3
        # the mapping order is a0,0 a1,0 a2,0 a3,0 a0,1 a1,1 ... a2,3 a3,3

        # iterate over the columns
        for i in range(4):
            # iterate over the rows
            for j in range(4):
                block[(i+(j*4))] = iput[(i*4)+j]
        # expand the key into an 176, 208, 240 bytes key
        expandedKey = self.expandKey(key, size, expandedKeySize)
        # decrypt the block using the expandedKey
        block = self.aes_invMain(block, expandedKey, nbrRounds)
        # unmap the block again into the output
        for k in range(4):
            # iterate over the rows
            for l in range(4):
                output[(k*4)+l] = block[(k+(l*4))]
        return output


class AESModeOfOperation(object):
    '''Handles AES with plaintext consistingof multiple blocks.
    Choice of block encoding modes:  OFT, CFB, CBC
    '''
    # Very annoying code:  all is for an object, but no state is kept!
    # Should just be plain functions in an AES_BlockMode module.
    aes = AES()

    # structure of supported modes of operation
    modeOfOperation = dict(OFB=0, CFB=1, CBC=2)

    # converts a 16 character string into a number array
    def convertString(self, string, start, end, mode):
        if end - start > 16: end = start + 16
        if mode == self.modeOfOperation["CBC"]: ar = [0] * 16
        else: ar = []

        i = start
        j = 0
        while len(ar) < end - start:
            ar.append(0)
        while i < end:
            ar[j] = ord(string[i])
            j += 1
            i += 1
        return ar

    # Mode of Operation Encryption
    # stringIn - Input String
    # mode - mode of type modeOfOperation
    # hexKey - a hex key of the bit length size
    # size - the bit length of the key
    # hexIV - the 128 bit hex Initilization Vector
    def encrypt(self, stringIn, mode, key, size, IV):
        if len(key) % size:
            return None
        if len(IV) % 16:
            return None
        # the AES input/output
        plaintext = []
        iput = [0] * 16
        output = []
        ciphertext = [0] * 16
        # the output cipher string
        cipherOut = []
        # char firstRound
        firstRound = True
        if stringIn != None:
            for j in range(int(math.ceil(float(len(stringIn))/16))):
                start = j*16
                end = j*16+16
                if  end > len(stringIn):
                    end = len(stringIn)
                plaintext = self.convertString(stringIn, start, end, mode)
                # print 'PT@%s:%s' % (j, plaintext)
                if mode == self.modeOfOperation["CFB"]:
                    if firstRound:
                        output = self.aes.encrypt(IV, key, size)
                        firstRound = False
                    else:
                        output = self.aes.encrypt(iput, key, size)
                    for i in range(16):
                        if len(plaintext)-1 < i:
                            ciphertext[i] = 0 ^ output[i]
                        elif len(output)-1 < i:
                            ciphertext[i] = plaintext[i] ^ 0
                        elif len(plaintext)-1 < i and len(output) < i:
                            ciphertext[i] = 0 ^ 0
                        else:
                            ciphertext[i] = plaintext[i] ^ output[i]
                    for k in range(end-start):
                        cipherOut.append(ciphertext[k])
                    iput = ciphertext
                elif mode == self.modeOfOperation["OFB"]:
                    if firstRound:
                        output = self.aes.encrypt(IV, key, size)
                        firstRound = False
                    else:
                        output = self.aes.encrypt(iput, key, size)
                    for i in range(16):
                        if len(plaintext)-1 < i:
                            ciphertext[i] = 0 ^ output[i]
                        elif len(output)-1 < i:
                            ciphertext[i] = plaintext[i] ^ 0
                        elif len(plaintext)-1 < i and len(output) < i:
                            ciphertext[i] = 0 ^ 0
                        else:
                            ciphertext[i] = plaintext[i] ^ output[i]
                    for k in range(end-start):
                        cipherOut.append(ciphertext[k])
                    iput = output
                elif mode == self.modeOfOperation["CBC"]:
                    for i in range(16):
                        if firstRound:
                            iput[i] =  plaintext[i] ^ IV[i]
                        else:
                            iput[i] =  plaintext[i] ^ ciphertext[i]
                    # print 'IP@%s:%s' % (j, iput)
                    firstRound = False
                    ciphertext = self.aes.encrypt(iput, key, size)
                    # always 16 bytes because of the padding for CBC
                    for k in range(16):
                        cipherOut.append(ciphertext[k])
        return mode, len(stringIn), cipherOut

    # Mode of Operation Decryption
    # cipherIn - Encrypted String
    # originalsize - The unencrypted string length - required for CBC
    # mode - mode of type modeOfOperation
    # key - a number array of the bit length size
    # size - the bit length of the key
    # IV - the 128 bit number array Initilization Vector
    def decrypt(self, cipherIn, originalsize, mode, key, size, IV):
        # cipherIn = unescCtrlChars(cipherIn)
        if len(key) % size:
            return None
        if len(IV) % 16:
            return None
        # the AES input/output
        ciphertext = []
        iput = []
        output = []
        plaintext = [0] * 16
        # the output plain text character list
        chrOut = []
        # char firstRound
        firstRound = True
        if cipherIn != None:
            for j in range(int(math.ceil(float(len(cipherIn))/16))):
                start = j*16
                end = j*16+16
                if j*16+16 > len(cipherIn):
                    end = len(cipherIn)
                ciphertext = cipherIn[start:end]
                if mode == self.modeOfOperation["CFB"]:
                    if firstRound:
                        output = self.aes.encrypt(IV, key, size)
                        firstRound = False
                    else:
                        output = self.aes.encrypt(iput, key, size)
                    for i in range(16):
                        if len(output)-1 < i:
                            plaintext[i] = 0 ^ ciphertext[i]
                        elif len(ciphertext)-1 < i:
                            plaintext[i] = output[i] ^ 0
                        elif len(output)-1 < i and len(ciphertext) < i:
                            plaintext[i] = 0 ^ 0
                        else:
                            plaintext[i] = output[i] ^ ciphertext[i]
                    for k in range(end-start):
                        chrOut.append(chr(plaintext[k]))
                    iput = ciphertext
                elif mode == self.modeOfOperation["OFB"]:
                    if firstRound:
                        output = self.aes.encrypt(IV, key, size)
                        firstRound = False
                    else:
                        output = self.aes.encrypt(iput, key, size)
                    for i in range(16):
                        if len(output)-1 < i:
                            plaintext[i] = 0 ^ ciphertext[i]
                        elif len(ciphertext)-1 < i:
                            plaintext[i] = output[i] ^ 0
                        elif len(output)-1 < i and len(ciphertext) < i:
                            plaintext[i] = 0 ^ 0
                        else:
                            plaintext[i] = output[i] ^ ciphertext[i]
                    for k in range(end-start):
                        chrOut.append(chr(plaintext[k]))
                    iput = output
                elif mode == self.modeOfOperation["CBC"]:
                    output = self.aes.decrypt(ciphertext, key, size)
                    for i in range(16):
                        if firstRound:
                            plaintext[i] = IV[i] ^ output[i]
                        else:
                            plaintext[i] = iput[i] ^ output[i]
                    firstRound = False
                    if originalsize is not None and originalsize < end:
                        for k in range(originalsize-start):
                            chrOut.append(chr(plaintext[k]))
                    else:
                        for k in range(end-start):
                            chrOut.append(chr(plaintext[k]))
                    iput = ciphertext
        return "".join(chrOut)


def append_PKCS7_padding(s):
    """return s padded to a multiple of 16-bytes by PKCS7 padding"""
    numpads = 16 - (len(s)%16)
    return s + numpads*chr(numpads)

def strip_PKCS7_padding(s):
    """return s stripped of PKCS7 padding"""
    if len(s)%16 or not s:
        raise ValueError("String of len %d can't be PCKS7-padded" % len(s))
    numpads = ord(s[-1])
    if numpads > 16:
        raise ValueError("String ending with %r can't be PCKS7-padded" % s[-1])
    return s[:-numpads]

def encryptData(key, data, mode=AESModeOfOperation.modeOfOperation["CBC"]):
    """encrypt `data` using `key`

    `key` should be a string of bytes.

    returned cipher is a string of bytes prepended with the initialization
    vector.

    """
    key = map(ord, key)
    if mode == AESModeOfOperation.modeOfOperation["CBC"]:
        data = append_PKCS7_padding(data)
    keysize = len(key)
    assert keysize in AES.keySize.values(), 'invalid key size: %s' % keysize
    # create a new iv using random data
    iv = [ord(i) for i in os.urandom(16)]
    moo = AESModeOfOperation()
    (mode, length, ciph) = moo.encrypt(data, mode, key, keysize, iv)
    # With padding, the original length does not need to be known. It's a bad
    # idea to store the original message length.
    # prepend the iv.
    return ''.join(map(chr, iv)) + ''.join(map(chr, ciph))

def decryptData(key, data, mode=AESModeOfOperation.modeOfOperation["CBC"]):
    """decrypt `data` using `key`

    `key` should be a string of bytes.

    `data` should have the initialization vector prepended as a string of
    ordinal values.
    """

    key = map(ord, key)
    keysize = len(key)
    assert keysize in AES.keySize.values(), 'invalid key size: %s' % keysize
    # iv is first 16 bytes
    iv = map(ord, data[:16])
    data = map(ord, data[16:])
    moo = AESModeOfOperation()
    decr = moo.decrypt(data, None, mode, key, keysize, iv)
    if mode == AESModeOfOperation.modeOfOperation["CBC"]:
        decr = strip_PKCS7_padding(decr)
    return decr

def generateRandomKey(keysize):
    """Generates a key from random data of length `keysize`.    
    The returned key is a string of bytes.    
    """
    if keysize not in (16, 24, 32):
        emsg = 'Invalid keysize, %s. Should be one of (16, 24, 32).'
        raise ValueError, emsg % keysize
    return os.urandom(keysize)

def testStr(cleartext, keysize=16, modeName = "CBC"):
    '''Test with random key, choice of mode.'''
    print 'Random key test', 'Mode:', modeName
    print 'cleartext:', cleartext
    key =  generateRandomKey(keysize)
    print 'Key:', [ord(x) for x in key]
    mode = AESModeOfOperation.modeOfOperation[modeName]
    cipher = encryptData(key, cleartext, mode)
    print 'Cipher:', [ord(x) for x in cipher]
    decr = decryptData(key, cipher, mode)
    print 'Decrypted:', decr
    
    
if __name__ == "__main__":
    moo = AESModeOfOperation()
    cleartext = "This is a test with several blocks!"
    cypherkey = [143,194,34,208,145,203,230,143,177,246,97,206,145,92,255,84]
    iv = [103,35,148,239,76,213,47,118,255,222,123,176,106,134,98,92]
    mode, orig_len, ciph = moo.encrypt(cleartext, moo.modeOfOperation["CBC"],
            cypherkey, moo.aes.keySize["SIZE_128"], iv)
    print 'm=%s, ol=%s (%s), ciph=%s' % (mode, orig_len, len(cleartext), ciph)
    decr = moo.decrypt(ciph, orig_len, mode, cypherkey,
            moo.aes.keySize["SIZE_128"], iv)
    print decr
    testStr(cleartext, 16, "CBC")

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#!/usr/bin/python

# aes.py: implements AES - Advanced Encryption Standard

# from the SlowAES project, http://code.google.com/p/slowaes/

# Alex Martelli ( http://www.aleax.it )

# Ported from C code written by Laurent Haan ( http://www.progressive-coding.com )

# Licensed under the Apache License, Version 2.0

# http://www.apache.org/licenses/

import os

import sys

import math

class AES(object):

'''AES funtions for a single block

'''

# Very annoying code: all is for an object, but no state is kept!

# Should just be plain functions in a AES modlule.

# valid key sizes

keySize = dict(SIZE_128=16, SIZE_192=24, SIZE_256=32)

# Rijndael S-box

sbox = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67,

0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59,

0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7,

0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1,

0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05,

0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83,

0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29,

0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b,

0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa,

0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c,

0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc,

0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec,

0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19,

0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee,

0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49,

0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,

0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4,

0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6,

0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70,

0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9,

0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e,

0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1,

0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0,

0x54, 0xbb, 0x16]

# Rijndael Inverted S-box

rsbox = [0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3,

0x9e, 0x81, 0xf3, 0xd7, 0xfb , 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f,

0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb , 0x54,

0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b,

0x42, 0xfa, 0xc3, 0x4e , 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24,

0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25 , 0x72, 0xf8,

0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d,

0x65, 0xb6, 0x92 , 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda,

0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84 , 0x90, 0xd8, 0xab,

0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3,

0x45, 0x06 , 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1,

0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b , 0x3a, 0x91, 0x11, 0x41,

0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6,

0x73 , 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9,

0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e , 0x47, 0xf1, 0x1a, 0x71, 0x1d,

0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b ,

0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0,

0xfe, 0x78, 0xcd, 0x5a, 0xf4 , 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07,

0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f , 0x60,

0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f,

0x93, 0xc9, 0x9c, 0xef , 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5,

0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61 , 0x17, 0x2b,

0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55,

0x21, 0x0c, 0x7d]

def getSBoxValue(self,num):

"""Retrieves a given S-Box Value"""

return self.sbox[num]

def getSBoxInvert(self,num):

"""Retrieves a given Inverted S-Box Value"""

return self.rsbox[num]

def rotate(self, word):

""" Rijndael's key schedule rotate operation.

Rotate a word eight bits to the left: eg, rotate(1d2c3a4f) == 2c3a4f1d

Word is an char list of size 4 (32 bits overall).

"""

return word[1:] + word[:1]

# Rijndael Rcon

Rcon = [0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36,

0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97,

0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72,

0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66,

0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04,

0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d,

0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3,

0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61,

0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a,

0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40,

0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc,

0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5,

0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a,

0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d,

0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c,

0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35,

0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4,

0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc,

0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08,

0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a,

0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d,

0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2,

0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74,

0xe8, 0xcb ]

def getRconValue(self, num):

"""Retrieves a given Rcon Value"""

return self.Rcon[num]

def core(self, word, iteration):

"""Key schedule core."""

# rotate the 32-bit word 8 bits to the left

word = self.rotate(word)

# apply S-Box substitution on all 4 parts of the 32-bit word

for i in range(4):

word[i] = self.getSBoxValue(word[i])

# XOR the output of the rcon operation with i to the first part

# (leftmost) only

word[0] = word[0] ^ self.getRconValue(iteration)

return word

def expandKey(self, key, size, expandedKeySize):

"""Rijndael's key expansion.

Expands an 128,192,256 key into an 176,208,240 bytes key

expandedKey is a char list of large enough size,

key is the non-expanded key.

"""

# current expanded keySize, in bytes

currentSize = 0

rconIteration = 1

expandedKey = [0] * expandedKeySize

# set the 16, 24, 32 bytes of the expanded key to the input key

for j in range(size):

expandedKey[j] = key[j]

currentSize += size

while currentSize < expandedKeySize:

# assign the previous 4 bytes to the temporary value t

t = expandedKey[currentSize-4:currentSize]

# every 16,24,32 bytes we apply the core schedule to t

# and increment rconIteration afterwards

if currentSize % size == 0:

t = self.core(t, rconIteration)

rconIteration += 1

# For 256-bit keys, we add an extra sbox to the calculation

if size == self.keySize["SIZE_256"] and ((currentSize % size) == 16):

for l in range(4): t[l] = self.getSBoxValue(t[l])

# We XOR t with the four-byte block 16,24,32 bytes before the new

# expanded key. This becomes the next four bytes in the expanded

# key.

for m in range(4):

expandedKey[currentSize] = expandedKey[currentSize - size] ^ \

t[m]

currentSize += 1

return expandedKey

def addRoundKey(self, state, roundKey):

"""Adds (XORs) the round key to the state."""

for i in range(16):

state[i] ^= roundKey[i]

return state

def createRoundKey(self, expandedKey, roundKeyPointer):

"""Create a round key.

Creates a round key from the given expanded key and the

position within the expanded key.

"""

roundKey = [0] * 16

for i in range(4):

for j in range(4):

roundKey[j*4+i] = expandedKey[roundKeyPointer + i*4 + j]

return roundKey

def galois_multiplication(self, a, b):

"""Galois multiplication of 8 bit characters a and b."""

p = 0

for counter in range(8):

if b & 1: p ^= a

hi_bit_set = a & 0x80

a <<= 1

# keep a 8 bit

a &= 0xFF

if hi_bit_set:

a ^= 0x1b

b >>= 1

return p

# substitute all the values from the state with the value in the SBox

# using the state value as index for the SBox

def subBytes(self, state, isInv):

if isInv: getter = self.getSBoxInvert

else: getter = self.getSBoxValue

for i in range(16): state[i] = getter(state[i])

return state

# iterate over the 4 rows and call shiftRow() with that row

def shiftRows(self, state, isInv):

for i in range(4):

state = self.shiftRow(state, i*4, i, isInv)

return state

# each iteration shifts the row to the left by 1

def shiftRow(self, state, statePointer, nbr, isInv):

for i in range(nbr):

if isInv:

state[statePointer:statePointer+4] = \

state[statePointer+3:statePointer+4] + \

state[statePointer:statePointer+3]

else:

state[statePointer:statePointer+4] = \

state[statePointer+1:statePointer+4] + \

state[statePointer:statePointer+1]

return state

# galois multiplication of the 4x4 matrix

def mixColumns(self, state, isInv):

# iterate over the 4 columns

for i in range(4):

# construct one column by slicing over the 4 rows

column = state[i:i+16:4]

# apply the mixColumn on one column

column = self.mixColumn(column, isInv)

# put the values back into the state

state[i:i+16:4] = column

return state

# galois multiplication of 1 column of the 4x4 matrix

def mixColumn(self, column, isInv):

if isInv: mult = [14, 9, 13, 11]

else: mult = [2, 1, 1, 3]

cpy = list(column)

g = self.galois_multiplication

column[0] = g(cpy[0], mult[0]) ^ g(cpy[3], mult[1]) ^ \

g(cpy[2], mult[2]) ^ g(cpy[1], mult[3])

column[1] = g(cpy[1], mult[0]) ^ g(cpy[0], mult[1]) ^ \

g(cpy[3], mult[2]) ^ g(cpy[2], mult[3])

column[2] = g(cpy[2], mult[0]) ^ g(cpy[1], mult[1]) ^ \

g(cpy[0], mult[2]) ^ g(cpy[3], mult[3])

column[3] = g(cpy[3], mult[0]) ^ g(cpy[2], mult[1]) ^ \

g(cpy[1], mult[2]) ^ g(cpy[0], mult[3])

return column

# applies the 4 operations of the forward round in sequence

def aes_round(self, state, roundKey):

state = self.subBytes(state, False)

state = self.shiftRows(state, False)

state = self.mixColumns(state, False)

state = self.addRoundKey(state, roundKey)

return state

# applies the 4 operations of the inverse round in sequence

def aes_invRound(self, state, roundKey):

state = self.shiftRows(state, True)

state = self.subBytes(state, True)

state = self.addRoundKey(state, roundKey)

state = self.mixColumns(state, True)

return state

# Perform the initial operations, the standard round, and the final

# operations of the forward aes, creating a round key for each round

def aes_main(self, state, expandedKey, nbrRounds):

state = self.addRoundKey(state, self.createRoundKey(expandedKey, 0))

i = 1

while i < nbrRounds:

state = self.aes_round(state,

self.createRoundKey(expandedKey, 16*i))

i += 1

state = self.subBytes(state, False)

state = self.shiftRows(state, False)

state = self.addRoundKey(state,

self.createRoundKey(expandedKey, 16*nbrRounds))

return state

# Perform the initial operations, the standard round, and the final

# operations of the inverse aes, creating a round key for each round

def aes_invMain(self, state, expandedKey, nbrRounds):

state = self.addRoundKey(state,

self.createRoundKey(expandedKey, 16*nbrRounds))

i = nbrRounds - 1

while i > 0:

state = self.aes_invRound(state,

self.createRoundKey(expandedKey, 16*i))

i -= 1

state = self.shiftRows(state, True)

state = self.subBytes(state, True)

state = self.addRoundKey(state, self.createRoundKey(expandedKey, 0))

return state

# encrypts a 128 bit input block against the given key of size specified

def encrypt(self, iput, key, size):

output = [0] * 16

# the number of rounds

nbrRounds = 0

# the 128 bit block to encode

block = [0] * 16

# set the number of rounds

if size == self.keySize["SIZE_128"]: nbrRounds = 10

elif size == self.keySize["SIZE_192"]: nbrRounds = 12

elif size == self.keySize["SIZE_256"]: nbrRounds = 14

else: return None

# the expanded keySize

expandedKeySize = 16*(nbrRounds+1)

# Set the block values, for the block:

# a0,0 a0,1 a0,2 a0,3

# a1,0 a1,1 a1,2 a1,3

# a2,0 a2,1 a2,2 a2,3

# a3,0 a3,1 a3,2 a3,3

# the mapping order is a0,0 a1,0 a2,0 a3,0 a0,1 a1,1 ... a2,3 a3,3

# iterate over the columns

for i in range(4):

# iterate over the rows

for j in range(4):

block[(i+(j*4))] = iput[(i*4)+j]

# expand the key into an 176, 208, 240 bytes key

# the expanded key

expandedKey = self.expandKey(key, size, expandedKeySize)

# encrypt the block using the expandedKey

block = self.aes_main(block, expandedKey, nbrRounds)

# unmap the block again into the output

for k in range(4):

# iterate over the rows

for l in range(4):

output[(k*4)+l] = block[(k+(l*4))]

return output

# decrypts a 128 bit input block against the given key of size specified

def decrypt(self, iput, key, size):

output = [0] * 16

# the number of rounds

nbrRounds = 0

# the 128 bit block to decode

block = [0] * 16

# set the number of rounds

if size == self.keySize["SIZE_128"]: nbrRounds = 10

elif size == self.keySize["SIZE_192"]: nbrRounds = 12

elif size == self.keySize["SIZE_256"]: nbrRounds = 14

else: return None

# the expanded keySize

expandedKeySize = 16*(nbrRounds+1)

# Set the block values, for the block:

# a0,0 a0,1 a0,2 a0,3

# a1,0 a1,1 a1,2 a1,3

# a2,0 a2,1 a2,2 a2,3

# a3,0 a3,1 a3,2 a3,3

# the mapping order is a0,0 a1,0 a2,0 a3,0 a0,1 a1,1 ... a2,3 a3,3

# iterate over the columns

for i in range(4):

# iterate over the rows

for j in range(4):

block[(i+(j*4))] = iput[(i*4)+j]

# expand the key into an 176, 208, 240 bytes key

expandedKey = self.expandKey(key, size, expandedKeySize)

# decrypt the block using the expandedKey

block = self.aes_invMain(block, expandedKey, nbrRounds)

# unmap the block again into the output

for k in range(4):

# iterate over the rows

for l in range(4):

output[(k*4)+l] = block[(k+(l*4))]

return output

class AESModeOfOperation(object):

'''Handles AES with plaintext consistingof multiple blocks.

Choice of block encoding modes: OFT, CFB, CBC

'''

# Very annoying code: all is for an object, but no state is kept!

# Should just be plain functions in an AES_BlockMode module.

aes = AES()

# structure of supported modes of operation

modeOfOperation = dict(OFB=0, CFB=1, CBC=2)

# converts a 16 character string into a number array

def convertString(self, string, start, end, mode):

if end - start > 16: end = start + 16

if mode == self.modeOfOperation["CBC"]: ar = [0] * 16

else: ar = []

i = start

j = 0

while len(ar) < end - start:

ar.append(0)

while i < end:

ar[j] = ord(string[i])

j += 1

i += 1

return ar

# Mode of Operation Encryption

# stringIn - Input String

# mode - mode of type modeOfOperation

# hexKey - a hex key of the bit length size

# size - the bit length of the key

# hexIV - the 128 bit hex Initilization Vector

def encrypt(self, stringIn, mode, key, size, IV):

if len(key) % size:

return None

if len(IV) % 16:

return None

# the AES input/output

plaintext = []

iput = [0] * 16

output = []

ciphertext = [0] * 16

# the output cipher string

cipherOut = []

# char firstRound

firstRound = True

if stringIn != None:

for j in range(int(math.ceil(float(len(stringIn))/16))):

start = j*16

end = j*16+16

if end > len(stringIn):

end = len(stringIn)

plaintext = self.convertString(stringIn, start, end, mode)

# print 'PT@%s:%s' % (j, plaintext)

if mode == self.modeOfOperation["CFB"]:

if firstRound:

output = self.aes.encrypt(IV, key, size)

firstRound = False

else:

output = self.aes.encrypt(iput, key, size)

for i in range(16):

if len(plaintext)-1 < i:

ciphertext[i] = 0 ^ output[i]

elif len(output)-1 < i:

ciphertext[i] = plaintext[i] ^ 0

elif len(plaintext)-1 < i and len(output) < i:

ciphertext[i] = 0 ^ 0

else:

ciphertext[i] = plaintext[i] ^ output[i]

for k in range(end-start):

cipherOut.append(ciphertext[k])

iput = ciphertext

elif mode == self.modeOfOperation["OFB"]:

if firstRound:

output = self.aes.encrypt(IV, key, size)

firstRound = False

else:

output = self.aes.encrypt(iput, key, size)

for i in range(16):

if len(plaintext)-1 < i:

ciphertext[i] = 0 ^ output[i]

elif len(output)-1 < i:

ciphertext[i] = plaintext[i] ^ 0

elif len(plaintext)-1 < i and len(output) < i:

ciphertext[i] = 0 ^ 0

else:

ciphertext[i] = plaintext[i] ^ output[i]

for k in range(end-start):

cipherOut.append(ciphertext[k])

iput = output

elif mode == self.modeOfOperation["CBC"]:

for i in range(16):

if firstRound:

iput[i] = plaintext[i] ^ IV[i]

else:

iput[i] = plaintext[i] ^ ciphertext[i]

# print 'IP@%s:%s' % (j, iput)

firstRound = False

ciphertext = self.aes.encrypt(iput, key, size)

# always 16 bytes because of the padding for CBC

for k in range(16):

cipherOut.append(ciphertext[k])

return mode, len(stringIn), cipherOut

# Mode of Operation Decryption

# cipherIn - Encrypted String

# originalsize - The unencrypted string length - required for CBC

# mode - mode of type modeOfOperation

# key - a number array of the bit length size

# size - the bit length of the key

# IV - the 128 bit number array Initilization Vector

def decrypt(self, cipherIn, originalsize, mode, key, size, IV):

# cipherIn = unescCtrlChars(cipherIn)

if len(key) % size:

return None

if len(IV) % 16:

return None

# the AES input/output

ciphertext = []

iput = []

output = []

plaintext = [0] * 16

# the output plain text character list

chrOut = []

# char firstRound

firstRound = True

if cipherIn != None:

for j in range(int(math.ceil(float(len(cipherIn))/16))):

start = j*16

end = j*16+16

if j*16+16 > len(cipherIn):

end = len(cipherIn)

ciphertext = cipherIn[start:end]

if mode == self.modeOfOperation["CFB"]:

if firstRound:

output = self.aes.encrypt(IV, key, size)

firstRound = False

else:

output = self.aes.encrypt(iput, key, size)

for i in range(16):

if len(output)-1 < i:

plaintext[i] = 0 ^ ciphertext[i]

elif len(ciphertext)-1 < i:

plaintext[i] = output[i] ^ 0

elif len(output)-1 < i and len(ciphertext) < i:

plaintext[i] = 0 ^ 0

else:

plaintext[i] = output[i] ^ ciphertext[i]

for k in range(end-start):

chrOut.append(chr(plaintext[k]))

iput = ciphertext

elif mode == self.modeOfOperation["OFB"]:

if firstRound:

output = self.aes.encrypt(IV, key, size)

firstRound = False

else:

output = self.aes.encrypt(iput, key, size)

for i in range(16):

if len(output)-1 < i:

plaintext[i] = 0 ^ ciphertext[i]

elif len(ciphertext)-1 < i:

plaintext[i] = output[i] ^ 0

elif len(output)-1 < i and len(ciphertext) < i:

plaintext[i] = 0 ^ 0

else:

plaintext[i] = output[i] ^ ciphertext[i]

for k in range(end-start):

chrOut.append(chr(plaintext[k]))

iput = output

elif mode == self.modeOfOperation["CBC"]:

output = self.aes.decrypt(ciphertext, key, size)

for i in range(16):

if firstRound:

plaintext[i] = IV[i] ^ output[i]

else:

plaintext[i] = iput[i] ^ output[i]

firstRound = False

if originalsize is not None and originalsize < end:

for k in range(originalsize-start):

chrOut.append(chr(plaintext[k]))

else:

for k in range(end-start):

chrOut.append(chr(plaintext[k]))

iput = ciphertext

return "".join(chrOut)

def append_PKCS7_padding(s):

"""return s padded to a multiple of 16-bytes by PKCS7 padding"""

numpads = 16 - (len(s)%16)

return s + numpads*chr(numpads)

def strip_PKCS7_padding(s):

"""return s stripped of PKCS7 padding"""

if len(s)%16 or not s:

raise ValueError("String of len %d can't be PCKS7-padded" % len(s))

numpads = ord(s[-1])

if numpads > 16:

raise ValueError("String ending with %r can't be PCKS7-padded" % s[-1])

return s[:-numpads]

def encryptData(key, data, mode=AESModeOfOperation.modeOfOperation["CBC"]):

"""encrypt `data` using `key`

`key` should be a string of bytes.

returned cipher is a string of bytes prepended with the initialization

vector.

"""

key = map(ord, key)

if mode == AESModeOfOperation.modeOfOperation["CBC"]:

data = append_PKCS7_padding(data)

keysize = len(key)

assert keysize in AES.keySize.values(), 'invalid key size: %s' % keysize

# create a new iv using random data

iv = [ord(i) for i in os.urandom(16)]

moo = AESModeOfOperation()

(mode, length, ciph) = moo.encrypt(data, mode, key, keysize, iv)

# With padding, the original length does not need to be known. It's a bad

# idea to store the original message length.

# prepend the iv.

return ''.join(map(chr, iv)) + ''.join(map(chr, ciph))

def decryptData(key, data, mode=AESModeOfOperation.modeOfOperation["CBC"]):

"""decrypt `data` using `key`

`key` should be a string of bytes.

`data` should have the initialization vector prepended as a string of

ordinal values.

"""

key = map(ord, key)

keysize = len(key)

assert keysize in AES.keySize.values(), 'invalid key size: %s' % keysize

# iv is first 16 bytes

iv = map(ord, data[:16])

data = map(ord, data[16:])

moo = AESModeOfOperation()

decr = moo.decrypt(data, None, mode, key, keysize, iv)

if mode == AESModeOfOperation.modeOfOperation["CBC"]:

decr = strip_PKCS7_padding(decr)

return decr

def generateRandomKey(keysize):

"""Generates a key from random data of length `keysize`.

The returned key is a string of bytes.

"""

if keysize not in (16, 24, 32):

emsg = 'Invalid keysize, %s. Should be one of (16, 24, 32).'

raise ValueError, emsg % keysize

return os.urandom(keysize)

def testStr(cleartext, keysize=16, modeName = "CBC"):

'''Test with random key, choice of mode.'''

print 'Random key test', 'Mode:', modeName

print 'cleartext:', cleartext

key = generateRandomKey(keysize)

print 'Key:', [ord(x) for x in key]

mode = AESModeOfOperation.modeOfOperation[modeName]

cipher = encryptData(key, cleartext, mode)

print 'Cipher:', [ord(x) for x in cipher]

decr = decryptData(key, cipher, mode)

print 'Decrypted:', decr

if __name__ == "__main__":

moo = AESModeOfOperation()

cleartext = "This is a test with several blocks!"

cypherkey = [143,194,34,208,145,203,230,143,177,246,97,206,145,92,255,84]

iv = [103,35,148,239,76,213,47,118,255,222,123,176,106,134,98,92]

mode, orig_len, ciph = moo.encrypt(cleartext, moo.modeOfOperation["CBC"],

cypherkey, moo.aes.keySize["SIZE_128"], iv)

print 'm=%s, ol=%s (%s), ciph=%s' % (mode, orig_len, len(cleartext), ciph)

decr = moo.decrypt(ciph, orig_len, mode, cypherkey,

moo.aes.keySize["SIZE_128"], iv)

print decr

testStr(cleartext, 16, "CBC")

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