获取指定已安装完整签名信息,包括MD5指纹：
public void getSingInfo() {
try {
PackageInfo packageInfo = getPackageManager().getPackageInfo("com.sina.weibo", PackageManager.GET_SIGNATURES);
Signature[] signs = packageInfo.signatures;
Signature sign = signs[0];
parseSignature(sign.toByteArray());
} catch (Exception e) {
e.printStackTrace();
}
}
public void parseSignature(byte[] signature) {
try {
CertificateFactory certFactory = CertificateFactory.getInstance("X.509");
X509Certificate cert = (X509Certificate) certFactory.generateCertificate(new ByteArrayInputStream(signature));
String pubKey = cert.getPublicKey().toString();
String signNumber = cert.getSerialNumber().toString();
System.out.println("signName:" + cert.getSigAlgName());
System.out.println("pubKey:" + pubKey);
System.out.println("signNumber:" + signNumber);
System.out.println("subjectDN:"+cert.getSubjectDN().toString());
} catch (CertificateException e) {
e.printStackTrace();
}
}