Make //crypto factories return std::unique_ptr<>s

Rather than make callers use base::WrapUnique or .reset(),
have //crypto functions that create new instances return them
in std::unique_ptr<>s

Also fixup NULL vs nullptr where it matters most, and remove
superflous .get() tests from the unique_ptr<>s

BUG=none
R=davidben@chromium.org

Review-Url: https://codereview.chromium.org/2095523002
Cr-Commit-Position: refs/heads/master@{#402368}

chrome/browser/browsing_data/browsing_data_channel_id_helper_unittest.cc

@@ -44,11 +44,11 @@ class BrowsingDataChannelIDHelperTest
     channel_id_store->SetChannelID(
         base::WrapUnique(new net::ChannelIDStore::ChannelID(
             "https://www.google.com:443", base::Time(),
-            base::WrapUnique(crypto::ECPrivateKey::Create()))));
+            crypto::ECPrivateKey::Create())));
     channel_id_store->SetChannelID(
         base::WrapUnique(new net::ChannelIDStore::ChannelID(
             "https://www.youtube.com:443", base::Time(),
-            base::WrapUnique(crypto::ECPrivateKey::Create()))));
+            crypto::ECPrivateKey::Create())));
   }
 
   void FetchCallback(
@@ -142,7 +142,7 @@ TEST_F(BrowsingDataChannelIDHelperTest, CannedEmpty) {
 
   ASSERT_TRUE(helper->empty());
   helper->AddChannelID(net::ChannelIDStore::ChannelID(
-      origin, base::Time(), base::WrapUnique(crypto::ECPrivateKey::Create())));
+      origin, base::Time(), crypto::ECPrivateKey::Create()));
   ASSERT_FALSE(helper->empty());
   helper->Reset();
   ASSERT_TRUE(helper->empty());

chrome/browser/browsing_data/browsing_data_remover_unittest.cc

@@ -493,8 +493,7 @@ class RemoveChannelIDTester : public net::SSLConfigService::Observer {
                              base::Time creation_time) {
     GetChannelIDStore()->SetChannelID(
         base::WrapUnique(new net::ChannelIDStore::ChannelID(
-            server_identifier, creation_time,
-            base::WrapUnique(crypto::ECPrivateKey::Create()))));
+            server_identifier, creation_time, crypto::ECPrivateKey::Create())));
   }
 
   // Add a server bound cert for |server|, with the current time as the

chrome/browser/chromeos/login/profile_auth_data_unittest.cc

@@ -110,17 +110,15 @@ class ProfileAuthDataTest : public testing::Test {
 };
 
 void ProfileAuthDataTest::SetUp() {
-  channel_id_key1_.reset(crypto::ECPrivateKey::Create());
-  channel_id_key2_.reset(crypto::ECPrivateKey::Create());
+  channel_id_key1_ = crypto::ECPrivateKey::Create();
+  channel_id_key2_ = crypto::ECPrivateKey::Create();
   PopulateBrowserContext(&login_browser_context_, kProxyAuthPassword1,
-                         kCookieValue1,
-                         base::WrapUnique(channel_id_key1_->Copy()));
+                         kCookieValue1, channel_id_key1_->Copy());
 }
 
 void ProfileAuthDataTest::PopulateUserBrowserContext() {
   PopulateBrowserContext(&user_browser_context_, kProxyAuthPassword2,
-                         kCookieValue2,
-                         base::WrapUnique(channel_id_key2_->Copy()));
+                         kCookieValue2, channel_id_key2_->Copy());
 }
 
 void ProfileAuthDataTest::Transfer(

chrome/browser/chromeos/settings/token_encryptor.cc

@@ -31,7 +31,7 @@ CryptohomeTokenEncryptor::CryptohomeTokenEncryptor(
   DCHECK(!system_salt.empty());
   // TODO(davidroche): should this use the system salt for both the password
   // and the salt value, or should this use a separate salt value?
-  system_salt_key_.reset(PassphraseToKey(system_salt_, system_salt_));
+  system_salt_key_ = PassphraseToKey(system_salt_, system_salt_);
 }
 
 CryptohomeTokenEncryptor::~CryptohomeTokenEncryptor() {
@@ -67,7 +67,7 @@ std::string CryptohomeTokenEncryptor::DecryptWithSystemSalt(
                              encrypted_token_hex);
 }
 
-crypto::SymmetricKey* CryptohomeTokenEncryptor::PassphraseToKey(
+std::unique_ptr<crypto::SymmetricKey> CryptohomeTokenEncryptor::PassphraseToKey(
     const std::string& passphrase,
     const std::string& salt) {
   return crypto::SymmetricKey::DeriveKeyFromPassword(

chrome/browser/chromeos/settings/token_encryptor.h

@@ -47,8 +47,9 @@ class CryptohomeTokenEncryptor : public TokenEncryptor {
 
  private:
   // Converts |passphrase| to a SymmetricKey using the given |salt|.
-  crypto::SymmetricKey* PassphraseToKey(const std::string& passphrase,
-                                        const std::string& salt);
+  std::unique_ptr<crypto::SymmetricKey> PassphraseToKey(
+      const std::string& passphrase,
+      const std::string& salt);
 
   // Encrypts (AES) the token given |key| and |salt|.
   std::string EncryptTokenWithKey(crypto::SymmetricKey* key,

chrome/browser/extensions/updater/local_extension_cache_unittest.cc

@@ -98,14 +98,13 @@ class LocalExtensionCacheTest : public testing::Test {
                                         base::FilePath* filename) {
     std::string data(size, 0);
 
-    crypto::SecureHash* hash =
+    std::unique_ptr<crypto::SecureHash> hash =
         crypto::SecureHash::Create(crypto::SecureHash::SHA256);
     hash->Update(data.c_str(), size);
     uint8_t output[crypto::kSHA256Length];
     hash->Finish(output, sizeof(output));
     const std::string hex_hash =
         base::ToLowerASCII(base::HexEncode(output, sizeof(output)));
-    delete hash;
 
     const base::FilePath file =
         GetExtensionFileName(dir, id, version, hex_hash);

chrome/browser/net/quota_policy_channel_id_store_unittest.cc

@@ -9,7 +9,6 @@
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
-#include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
 #include "base/message_loop/message_loop.h"
@@ -84,11 +83,9 @@ TEST_F(QuotaPolicyChannelIDStoreTest, TestPersistence) {
       crypto::ECPrivateKey::Create());
   std::unique_ptr<crypto::ECPrivateKey> foo_key(crypto::ECPrivateKey::Create());
   store_->AddChannelID(net::DefaultChannelIDStore::ChannelID(
-      "google.com", base::Time::FromInternalValue(1),
-      base::WrapUnique(goog_key->Copy())));
+      "google.com", base::Time::FromInternalValue(1), goog_key->Copy()));
   store_->AddChannelID(net::DefaultChannelIDStore::ChannelID(
-      "foo.com", base::Time::FromInternalValue(3),
-      base::WrapUnique(foo_key->Copy())));
+      "foo.com", base::Time::FromInternalValue(3), foo_key->Copy()));
 
   std::vector<std::unique_ptr<net::DefaultChannelIDStore::ChannelID>>
       channel_ids;
@@ -143,10 +140,10 @@ TEST_F(QuotaPolicyChannelIDStoreTest, TestPersistence) {
 TEST_F(QuotaPolicyChannelIDStoreTest, TestPolicy) {
   store_->AddChannelID(net::DefaultChannelIDStore::ChannelID(
       "google.com", base::Time::FromInternalValue(1),
-      base::WrapUnique(crypto::ECPrivateKey::Create())));
+      crypto::ECPrivateKey::Create()));
   store_->AddChannelID(net::DefaultChannelIDStore::ChannelID(
       "nonpersistent.com", base::Time::FromInternalValue(3),
-      base::WrapUnique(crypto::ECPrivateKey::Create())));
+      crypto::ECPrivateKey::Create()));
 
   std::vector<std::unique_ptr<net::DefaultChannelIDStore::ChannelID>>
       channel_ids;
@@ -176,10 +173,10 @@ TEST_F(QuotaPolicyChannelIDStoreTest, TestPolicy) {
   // being committed to disk.
   store_->AddChannelID(net::DefaultChannelIDStore::ChannelID(
       "nonpersistent.com", base::Time::FromInternalValue(5),
-      base::WrapUnique(crypto::ECPrivateKey::Create())));
+      crypto::ECPrivateKey::Create()));
   store_->AddChannelID(net::DefaultChannelIDStore::ChannelID(
       "persistent.com", base::Time::FromInternalValue(7),
-      base::WrapUnique(crypto::ECPrivateKey::Create())));
+      crypto::ECPrivateKey::Create()));
 
   // Now close the store, and the nonpersistent.com channel IDs should be
   // deleted according to policy.

components/crx_file/crx_file.cc

@@ -111,7 +111,7 @@ CrxFile::ValidateError CrxFile::ValidateSignature(
   base::ScopedFILE file(base::OpenFile(crx_path, "rb"));
   std::unique_ptr<crypto::SecureHash> hash;
   if (!expected_hash.empty())
-    hash.reset(crypto::SecureHash::Create(crypto::SecureHash::SHA256));
+    hash = crypto::SecureHash::Create(crypto::SecureHash::SHA256);
 
   if (!file.get())
     return ValidateError::CRX_FILE_NOT_READABLE;

components/os_crypt/os_crypt_mac.mm

@@ -77,12 +77,10 @@ crypto::SymmetricKey* GetEncryptionKey() {
 
   // Create an encryption key from our password and salt. The key is
   // intentionally leaked.
-  cached_encryption_key =
-      crypto::SymmetricKey::DeriveKeyFromPassword(crypto::SymmetricKey::AES,
-                                                  password,
-                                                  salt,
-                                                  kEncryptionIterations,
-                                                  kDerivedKeySizeInBits);
+  cached_encryption_key = crypto::SymmetricKey::DeriveKeyFromPassword(
+                              crypto::SymmetricKey::AES, password, salt,
+                              kEncryptionIterations, kDerivedKeySizeInBits)
+                              .release();
   ANNOTATE_LEAKING_OBJECT_PTR(cached_encryption_key);
   DCHECK(cached_encryption_key);
   return cached_encryption_key;

content/browser/download/base_file.cc

@@ -208,7 +208,7 @@ std::string BaseFile::DebugString() const {
 
 DownloadInterruptReason BaseFile::CalculatePartialHash(
     const std::string& hash_to_expect) {
-  secure_hash_.reset(crypto::SecureHash::Create(crypto::SecureHash::SHA256));
+  secure_hash_ = crypto::SecureHash::Create(crypto::SecureHash::SHA256);
 
   if (bytes_so_far_ == 0)
     return DOWNLOAD_INTERRUPT_REASON_NONE;

content/browser/download/download_item_impl.cc

@@ -31,7 +31,6 @@
 #include "base/format_macros.h"
 #include "base/guid.h"
 #include "base/logging.h"
-#include "base/memory/ptr_util.h"
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
@@ -1175,9 +1174,9 @@ void DownloadItemImpl::Start(
 
     int64_t offset = new_create_info.save_info->offset;
     std::unique_ptr<crypto::SecureHash> hash_state =
-        base::WrapUnique(new_create_info.save_info->hash_state
-                             ? new_create_info.save_info->hash_state->Clone()
-                             : nullptr);
+        new_create_info.save_info->hash_state
+            ? new_create_info.save_info->hash_state->Clone()
+            : nullptr;
 
     // Interrupted downloads also need a target path.
     if (target_path_.empty()) {

crypto/ec_private_key.cc

@@ -13,8 +13,6 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#include <memory>
-
 #include "base/logging.h"
 #include "crypto/auto_cbb.h"
 #include "crypto/openssl_util.h"
@@ -43,13 +41,13 @@ bool ExportKeyWithBio(const void* key,
     return false;
 
   ScopedBIO bio(BIO_new(BIO_s_mem()));
-  if (!bio.get())
+  if (!bio)
     return false;
 
   if (!export_fn(bio.get(), key))
     return false;
 
-  char* data = NULL;
+  char* data = nullptr;
   long len = BIO_get_mem_data(bio.get(), &data);
   if (!data || len < 0)
     return false;
@@ -65,28 +63,21 @@ ECPrivateKey::~ECPrivateKey() {
     EVP_PKEY_free(key_);
 }
 
-ECPrivateKey* ECPrivateKey::Copy() const {
-  std::unique_ptr<ECPrivateKey> copy(new ECPrivateKey);
-  if (key_)
-    copy->key_ = EVP_PKEY_up_ref(key_);
-  return copy.release();
-}
-
 // static
-ECPrivateKey* ECPrivateKey::Create() {
+std::unique_ptr<ECPrivateKey> ECPrivateKey::Create() {
   OpenSSLErrStackTracer err_tracer(FROM_HERE);
 
   ScopedEC_KEY ec_key(EC_KEY_new_by_curve_name(NID_X9_62_prime256v1));
-  if (!ec_key.get() || !EC_KEY_generate_key(ec_key.get()))
-    return NULL;
+  if (!ec_key || !EC_KEY_generate_key(ec_key.get()))
+    return nullptr;
 
   std::unique_ptr<ECPrivateKey> result(new ECPrivateKey());
   result->key_ = EVP_PKEY_new();
   if (!result->key_ || !EVP_PKEY_set1_EC_KEY(result->key_, ec_key.get()))
-    return NULL;
+    return nullptr;
 
   CHECK_EQ(EVP_PKEY_EC, EVP_PKEY_id(result->key_));
-  return result.release();
+  return result;
 }
 
 // static
@@ -100,13 +91,13 @@ std::unique_ptr<ECPrivateKey> ECPrivateKey::CreateFromPrivateKeyInfo(
   if (!pkey || CBS_len(&cbs) != 0 || EVP_PKEY_id(pkey.get()) != EVP_PKEY_EC)
     return nullptr;
 
-  std::unique_ptr<ECPrivateKey> result(new ECPrivateKey);
+  std::unique_ptr<ECPrivateKey> result(new ECPrivateKey());
   result->key_ = pkey.release();
   return result;
 }
 
 // static
-ECPrivateKey* ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
+std::unique_ptr<ECPrivateKey> ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
     const std::string& password,
     const std::vector<uint8_t>& encrypted_private_key_info,
     const std::vector<uint8_t>& subject_public_key_info) {
@@ -114,16 +105,16 @@ ECPrivateKey* ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
   // useful for the NSS implementation (which uses the public key's SHA1
   // as a lookup key when storing the private one in its store).
   if (encrypted_private_key_info.empty())
-    return NULL;
+    return nullptr;
 
   OpenSSLErrStackTracer err_tracer(FROM_HERE);
 
   const uint8_t* data = &encrypted_private_key_info[0];
   const uint8_t* ptr = data;
   ScopedX509_SIG p8_encrypted(
-      d2i_X509_SIG(NULL, &ptr, encrypted_private_key_info.size()));
+      d2i_X509_SIG(nullptr, &ptr, encrypted_private_key_info.size()));
   if (!p8_encrypted || ptr != data + encrypted_private_key_info.size())
-    return NULL;
+    return nullptr;
 
   ScopedPKCS8_PRIV_KEY_INFO p8_decrypted;
   if (password.empty()) {
@@ -142,15 +133,22 @@ ECPrivateKey* ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
   }
 
   if (!p8_decrypted)
-    return NULL;
+    return nullptr;
 
   // Create a new EVP_PKEY for it.
-  std::unique_ptr<ECPrivateKey> result(new ECPrivateKey);
+  std::unique_ptr<ECPrivateKey> result(new ECPrivateKey());
   result->key_ = EVP_PKCS82PKEY(p8_decrypted.get());
   if (!result->key_ || EVP_PKEY_id(result->key_) != EVP_PKEY_EC)
-    return NULL;
+    return nullptr;
 
-  return result.release();
+  return result;
+}
+
+std::unique_ptr<ECPrivateKey> ECPrivateKey::Copy() const {
+  std::unique_ptr<ECPrivateKey> copy(new ECPrivateKey());
+  if (key_)
+    copy->key_ = EVP_PKEY_up_ref(key_);
+  return copy;
 }
 
 bool ECPrivateKey::ExportPrivateKey(std::vector<uint8_t>* output) const {
@@ -174,7 +172,7 @@ bool ECPrivateKey::ExportEncryptedPrivateKey(
   OpenSSLErrStackTracer err_tracer(FROM_HERE);
   // Convert into a PKCS#8 object.
   ScopedPKCS8_PRIV_KEY_INFO pkcs8(EVP_PKEY2PKCS8(key_));
-  if (!pkcs8.get())
+  if (!pkcs8)
     return false;
 
   // Encrypt the object.
@@ -190,7 +188,7 @@ bool ECPrivateKey::ExportEncryptedPrivateKey(
       0,
       iterations,
       pkcs8.get()));
-  if (!encrypted.get())
+  if (!encrypted)
     return false;
 
   // Write it into |*output|
@@ -236,6 +234,6 @@ bool ECPrivateKey::ExportRawPublicKey(std::string* output) const {
   return true;
 }
 
-ECPrivateKey::ECPrivateKey() : key_(NULL) {}
+ECPrivateKey::ECPrivateKey() : key_(nullptr) {}
 
 }  // namespace crypto

crypto/ec_private_key.h

@@ -30,10 +30,10 @@ class CRYPTO_EXPORT ECPrivateKey {
  public:
   ~ECPrivateKey();
 
-  // Creates a new random instance. Can return NULL if initialization fails.
+  // Creates a new random instance. Can return nullptr if initialization fails.
   // The created key will use the NIST P-256 curve.
   // TODO(mattm): Add a curve parameter.
-  static ECPrivateKey* Create();
+  static std::unique_ptr<ECPrivateKey> Create();
 
   // Create a new instance by importing an existing private key. The format is
   // an ASN.1-encoded PrivateKeyInfo block from PKCS #8. This can return
@@ -44,17 +44,17 @@ class CRYPTO_EXPORT ECPrivateKey {
   // Creates a new instance by importing an existing key pair.
   // The key pair is given as an ASN.1-encoded PKCS #8 EncryptedPrivateKeyInfo
   // block and an X.509 SubjectPublicKeyInfo block.
-  // Returns NULL if initialization fails.
+  // Returns nullptr if initialization fails.
   //
   // This function is deprecated. Use CreateFromPrivateKeyInfo for new code.
   // See https://crbug.com/603319.
-  static ECPrivateKey* CreateFromEncryptedPrivateKeyInfo(
+  static std::unique_ptr<ECPrivateKey> CreateFromEncryptedPrivateKeyInfo(
       const std::string& password,
       const std::vector<uint8_t>& encrypted_private_key_info,
       const std::vector<uint8_t>& subject_public_key_info);
 
   // Returns a copy of the object.
-  ECPrivateKey* Copy() const;
+  std::unique_ptr<ECPrivateKey> Copy() const;
 
   EVP_PKEY* key() { return key_; }
 

crypto/ec_private_key_unittest.cc

@@ -45,7 +45,7 @@ TEST(ECPrivateKeyUnitTest, InitRandomTest) {
   static const char kPassword2[] = "test";
 
   std::unique_ptr<crypto::ECPrivateKey> keypair(crypto::ECPrivateKey::Create());
-  ASSERT_TRUE(keypair.get());
+  ASSERT_TRUE(keypair);
 
   // Re-import as a PrivateKeyInfo.
   std::vector<uint8_t> privkey;
@@ -61,16 +61,16 @@ TEST(ECPrivateKeyUnitTest, InitRandomTest) {
   EXPECT_TRUE(
       keypair->ExportEncryptedPrivateKey(kPassword1, 1, &encrypted_privkey));
   EXPECT_TRUE(keypair->ExportPublicKey(&pubkey));
-  keypair_copy.reset(crypto::ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
-      kPassword1, encrypted_privkey, pubkey));
+  keypair_copy = crypto::ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
+      kPassword1, encrypted_privkey, pubkey);
   ASSERT_TRUE(keypair_copy);
   ExpectKeysEqual(keypair.get(), keypair_copy.get());
 
   // Re-import as an EncryptedPrivateKeyInfo with kPassword2.
   EXPECT_TRUE(
       keypair->ExportEncryptedPrivateKey(kPassword2, 1, &encrypted_privkey));
-  keypair_copy.reset(crypto::ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
-      kPassword2, encrypted_privkey, pubkey));
+  keypair_copy = crypto::ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
+      kPassword2, encrypted_privkey, pubkey);
   ASSERT_TRUE(keypair_copy);
   ExpectKeysEqual(keypair.get(), keypair_copy.get());
 }
@@ -79,8 +79,8 @@ TEST(ECPrivateKeyUnitTest, Copy) {
   std::unique_ptr<crypto::ECPrivateKey> keypair1(
       crypto::ECPrivateKey::Create());
   std::unique_ptr<crypto::ECPrivateKey> keypair2(keypair1->Copy());
-  ASSERT_TRUE(keypair1.get());
-  ASSERT_TRUE(keypair2.get());
+  ASSERT_TRUE(keypair1);
+  ASSERT_TRUE(keypair2);
 
   ExpectKeysEqual(keypair1.get(), keypair2.get());
 }
@@ -206,7 +206,7 @@ TEST(ECPrivateKeyUnitTest, BadPasswordTest) {
 
   std::unique_ptr<crypto::ECPrivateKey> keypair1(
       crypto::ECPrivateKey::Create());
-  ASSERT_TRUE(keypair1.get());
+  ASSERT_TRUE(keypair1);
 
   std::vector<uint8_t> privkey1;
   std::vector<uint8_t> pubkey1;
@@ -217,7 +217,7 @@ TEST(ECPrivateKeyUnitTest, BadPasswordTest) {
   std::unique_ptr<crypto::ECPrivateKey> keypair2(
       crypto::ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
           password2, privkey1, pubkey1));
-  ASSERT_FALSE(keypair2.get());
+  ASSERT_FALSE(keypair2);
 }
 
 TEST(ECPrivateKeyUnitTest, LoadNSSKeyTest) {
@@ -256,7 +256,7 @@ TEST(ECPrivateKeyUnitTest, LoadNSSKeyTest) {
           std::vector<uint8_t>(std::begin(kNSSPublicKey),
                                std::end(kNSSPublicKey))));
 
-  EXPECT_TRUE(keypair_nss.get());
+  EXPECT_TRUE(keypair_nss);
 }
 
 TEST(ECPrivateKeyUnitTest, LoadOpenSSLKeyTest) {
@@ -303,7 +303,7 @@ TEST(ECPrivateKeyUnitTest, LoadOpenSSLKeyTest) {
           std::vector<uint8_t>(std::begin(kOpenSSLPublicKey),
                                std::end(kOpenSSLPublicKey))));
 
-  EXPECT_TRUE(keypair_openssl.get());
+  EXPECT_TRUE(keypair_openssl);
 
   std::vector<uint8_t> public_key;
   EXPECT_TRUE(keypair_openssl->ExportPublicKey(&public_key));
@@ -398,5 +398,5 @@ TEST(ECPrivateKeyUnitTest, LoadOldOpenSSLKeyTest) {
           std::vector<uint8_t>(std::begin(kOpenSSLPublicKey),
                                std::end(kOpenSSLPublicKey))));
 
-  EXPECT_TRUE(keypair_openssl.get());
+  EXPECT_TRUE(keypair_openssl);
 }

crypto/ec_signature_creator.cc

@@ -5,21 +5,23 @@
 #include "crypto/ec_signature_creator.h"
 
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "crypto/ec_signature_creator_impl.h"
 
 namespace crypto {
 
 namespace {
 
-ECSignatureCreatorFactory* g_factory_ = NULL;
+ECSignatureCreatorFactory* g_factory_ = nullptr;
 
 }  // namespace
 
 // static
-ECSignatureCreator* ECSignatureCreator::Create(ECPrivateKey* key) {
+std::unique_ptr<ECSignatureCreator> ECSignatureCreator::Create(
+    ECPrivateKey* key) {
   if (g_factory_)
     return g_factory_->Create(key);
-  return new ECSignatureCreatorImpl(key);
+  return base::MakeUnique<ECSignatureCreatorImpl>(key);
 }
 
 // static

crypto/ec_signature_creator.h

@@ -7,6 +7,7 @@
 
 #include <stdint.h>
 
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -21,7 +22,7 @@ class CRYPTO_EXPORT ECSignatureCreatorFactory {
  public:
   virtual ~ECSignatureCreatorFactory() {}
 
-  virtual ECSignatureCreator* Create(ECPrivateKey* key) = 0;
+  virtual std::unique_ptr<ECSignatureCreator> Create(ECPrivateKey* key) = 0;
 };
 
 // Signs data using a bare private key (as opposed to a full certificate).
@@ -35,7 +36,7 @@ class CRYPTO_EXPORT ECSignatureCreator {
   // instance outlives the created ECSignatureCreator.
   // TODO(rch):  This is currently hard coded to use SHA256. Ideally, we should
   // pass in the hash algorithm identifier.
-  static ECSignatureCreator* Create(ECPrivateKey* key);
+  static std::unique_ptr<ECSignatureCreator> Create(ECPrivateKey* key);
 
   // Set a factory to make the Create function return non-standard
   // ECSignatureCreator objects.  Because the ECDSA algorithm involves

crypto/ec_signature_creator_impl.cc

@@ -33,9 +33,10 @@ bool ECSignatureCreatorImpl::Sign(const uint8_t* data,
   ScopedEVP_MD_CTX ctx(EVP_MD_CTX_create());
   size_t sig_len = 0;
   if (!ctx.get() ||
-      !EVP_DigestSignInit(ctx.get(), NULL, EVP_sha256(), NULL, key_->key()) ||
+      !EVP_DigestSignInit(ctx.get(), nullptr, EVP_sha256(), nullptr,
+                          key_->key()) ||
       !EVP_DigestSignUpdate(ctx.get(), data, data_len) ||
-      !EVP_DigestSignFinal(ctx.get(), NULL, &sig_len)) {
+      !EVP_DigestSignFinal(ctx.get(), nullptr, &sig_len)) {
     return false;
   }
 
@@ -43,9 +44,9 @@ bool ECSignatureCreatorImpl::Sign(const uint8_t* data,
   if (!EVP_DigestSignFinal(ctx.get(), &signature->front(), &sig_len))
     return false;
 
-  // NOTE: A call to EVP_DigestSignFinal() with a NULL second parameter returns
-  // a maximum allocation size, while the call without a NULL returns the real
-  // one, which may be smaller.
+  // NOTE: A call to EVP_DigestSignFinal() with a nullptr second parameter
+  // returns a maximum allocation size, while the call without a nullptr
+  // returns the real one, which may be smaller.
   signature->resize(sig_len);
   return true;
 }

crypto/encryptor.cc

@@ -23,7 +23,8 @@ const EVP_CIPHER* GetCipherForKey(SymmetricKey* key) {
   switch (key->key().length()) {
     case 16: return EVP_aes_128_cbc();
     case 32: return EVP_aes_256_cbc();
-    default: return NULL;
+    default:
+      return nullptr;
   }
 }
 
@@ -84,10 +85,7 @@ size_t Encryptor::Counter::GetLengthInBytes() const {
 /////////////////////////////////////////////////////////////////////////////
 // Encryptor Implementation.
 
-Encryptor::Encryptor()
-    : key_(NULL),
-      mode_(CBC) {
-}
+Encryptor::Encryptor() : key_(nullptr), mode_(CBC) {}
 
 Encryptor::~Encryptor() {
 }
@@ -102,7 +100,7 @@ bool Encryptor::Init(SymmetricKey* key,
   if (mode == CBC && iv.size() != AES_BLOCK_SIZE)
     return false;
 
-  if (GetCipherForKey(key) == NULL)
+  if (GetCipherForKey(key) == nullptr)
     return false;
 
   key_ = key;
@@ -191,9 +189,10 @@ bool Encryptor::Crypt(bool do_encrypt,
   DCHECK_EQ(EVP_CIPHER_key_length(cipher), key.length());
 
   ScopedCipherCTX ctx;
-  if (!EVP_CipherInit_ex(
-          ctx.get(), cipher, NULL, reinterpret_cast<const uint8_t*>(key.data()),
-          reinterpret_cast<const uint8_t*>(iv_.data()), do_encrypt))
+  if (!EVP_CipherInit_ex(ctx.get(), cipher, nullptr,
+                         reinterpret_cast<const uint8_t*>(key.data()),
+                         reinterpret_cast<const uint8_t*>(iv_.data()),
+                         do_encrypt))
     return false;
 
   // When encrypting, add another block size of space to allow for any padding.

crypto/hmac.cc

@@ -63,10 +63,10 @@ bool HMAC::Sign(const base::StringPiece& data,
   DCHECK(initialized_);
 
   ScopedOpenSSLSafeSizeBuffer<EVP_MAX_MD_SIZE> result(digest, digest_length);
-  return !!::HMAC(hash_alg_ == SHA1 ? EVP_sha1() : EVP_sha256(),
-                  key_.data(), key_.size(),
+  return !!::HMAC(hash_alg_ == SHA1 ? EVP_sha1() : EVP_sha256(), key_.data(),
+                  key_.size(),
                   reinterpret_cast<const unsigned char*>(data.data()),
-                  data.size(), result.safe_buffer(), NULL);
+                  data.size(), result.safe_buffer(), nullptr);
 }
 
 bool HMAC::Verify(const base::StringPiece& data,

crypto/hmac_unittest.cc

@@ -287,7 +287,7 @@ TEST(HMACTest, EmptyKey) {
   base::StringPiece data("");
 
   crypto::HMAC hmac(crypto::HMAC::SHA1);
-  ASSERT_TRUE(hmac.Init(NULL, 0));
+  ASSERT_TRUE(hmac.Init(nullptr, 0));
 
   unsigned char digest[kSHA1DigestSize];
   EXPECT_TRUE(hmac.Sign(data, digest, kSHA1DigestSize));

crypto/mock_apple_keychain.h

@@ -209,7 +209,7 @@ class CRYPTO_EXPORT MockAppleKeychain : public AppleKeychain {
   bool locked_;
 
   typedef struct KeychainPasswordData {
-    KeychainPasswordData() : data(NULL), length(0) {}
+    KeychainPasswordData() : data(nullptr), length(0) {}
     void* data;
     UInt32 length;
   } KeychainPasswordData;

crypto/nss_util.cc

@@ -126,13 +126,13 @@ char* PKCS11PasswordFunc(PK11SlotInfo* slot, PRBool retry, void* arg) {
                                                      retry != PR_FALSE,
                                                      &cancelled);
     if (cancelled)
-      return NULL;
+      return nullptr;
     char* result = PORT_Strdup(password.c_str());
     password.replace(0, password.size(), password.size(), 0);
     return result;
   }
-  DLOG(ERROR) << "PK11 password requested with NULL arg";
-  return NULL;
+  DLOG(ERROR) << "PK11 password requested with nullptr arg";
+  return nullptr;
 }
 
 // NSS creates a local cache of the sqlite database if it detects that the
@@ -218,8 +218,8 @@ class ChromeOSUserData {
   }
 
   ScopedPK11Slot GetPublicSlot() {
-    return ScopedPK11Slot(
-        public_slot_ ? PK11_ReferenceSlot(public_slot_.get()) : NULL);
+    return ScopedPK11Slot(public_slot_ ? PK11_ReferenceSlot(public_slot_.get())
+                                       : nullptr);
   }
 
   ScopedPK11Slot GetPrivateSlot(
@@ -353,7 +353,7 @@ class NSSInitSingleton {
 
     // If everything is already initialized, then return true.
     // Note that only |tpm_slot_| is checked, since |chaps_module_| could be
-    // NULL in tests while |tpm_slot_| has been set to the test DB.
+    // nullptr in tests while |tpm_slot_| has been set to the test DB.
     if (tpm_slot_) {
       base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
                                                     base::Bind(callback, true));
@@ -608,7 +608,7 @@ class NSSInitSingleton {
 
   void SetSystemKeySlotForTesting(ScopedPK11Slot slot) {
     // Ensure that a previous value of test_system_slot_ is not overwritten.
-    // Unsetting, i.e. setting a NULL, however is allowed.
+    // Unsetting, i.e. setting a nullptr, however is allowed.
     DCHECK(!slot || !test_system_slot_);
     test_system_slot_ = std::move(slot);
     if (test_system_slot_) {
@@ -644,7 +644,7 @@ class NSSInitSingleton {
     // TODO(mattm): chromeos::TPMTokenloader always calls
     // InitializeTPMTokenAndSystemSlot with slot 0.  If the system slot is
     // disabled, tpm_slot_ will be the first user's slot instead. Can that be
-    // detected and return NULL instead?
+    // detected and return nullptr instead?
 
     base::Closure wrapped_callback;
     if (!callback.is_null()) {
@@ -669,8 +669,8 @@ class NSSInitSingleton {
   NSSInitSingleton()
       : tpm_token_enabled_for_nss_(false),
         initializing_tpm_token_(false),
-        chaps_module_(NULL),
-        root_(NULL) {
+        chaps_module_(nullptr),
+        root_(nullptr) {
     // It's safe to construct on any thread, since LazyInstance will prevent any
     // other threads from accessing until the constructor is done.
     thread_checker_.DetachFromThread();
@@ -717,7 +717,7 @@ class NSSInitSingleton {
     }
     if (status != SECSuccess) {
       VLOG(1) << "Initializing NSS without a persistent database.";
-      status = NSS_NoDB_Init(NULL);
+      status = NSS_NoDB_Init(nullptr);
       if (status != SECSuccess) {
         CrashOnNSSInitFailure();
         return;
@@ -734,7 +734,7 @@ class NSSInitSingleton {
       // PK11_InitPin may write to the keyDB, but no other thread can use NSS
       // yet, so we don't need to lock.
       if (PK11_NeedUserInit(slot))
-        PK11_InitPin(slot, NULL, NULL);
+        PK11_InitPin(slot, nullptr, nullptr);
       PK11_FreeSlot(slot);
     }
 
@@ -758,12 +758,12 @@ class NSSInitSingleton {
     if (root_) {
       SECMOD_UnloadUserModule(root_);
       SECMOD_DestroyModule(root_);
-      root_ = NULL;
+      root_ = nullptr;
     }
     if (chaps_module_) {
       SECMOD_UnloadUserModule(chaps_module_);
       SECMOD_DestroyModule(chaps_module_);
-      chaps_module_ = NULL;
+      chaps_module_ = nullptr;
     }
 
     SECStatus status = NSS_Shutdown();
@@ -776,14 +776,14 @@ class NSSInitSingleton {
 
   // Load nss's built-in root certs.
   SECMODModule* InitDefaultRootCerts() {
-    SECMODModule* root = LoadModule("Root Certs", "libnssckbi.so", NULL);
+    SECMODModule* root = LoadModule("Root Certs", "libnssckbi.so", nullptr);
     if (root)
       return root;
 
     // Aw, snap.  Can't find/load root cert shared library.
     // This will make it hard to talk to anybody via https.
     // TODO(mattm): Re-add the NOTREACHED here when crbug.com/310972 is fixed.
-    return NULL;
+    return nullptr;
   }
 
   // Load the given module for this NSS session.
@@ -799,17 +799,17 @@ class NSSInitSingleton {
     // https://bugzilla.mozilla.org/show_bug.cgi?id=642546 was filed
     // on NSS codebase to address this.
     SECMODModule* module = SECMOD_LoadUserModule(
-        const_cast<char*>(modparams.c_str()), NULL, PR_FALSE);
+        const_cast<char*>(modparams.c_str()), nullptr, PR_FALSE);
     if (!module) {
       LOG(ERROR) << "Error loading " << name << " module into NSS: "
                  << GetNSSErrorMessage();
-      return NULL;
+      return nullptr;
     }
     if (!module->loaded) {
       LOG(ERROR) << "After loading " << name << ", loaded==false: "
                  << GetNSSErrorMessage();
       SECMOD_DestroyModule(module);
-      return NULL;
+      return nullptr;
     }
     return module;
   }
@@ -846,7 +846,7 @@ ScopedPK11Slot OpenSoftwareNSSDB(const base::FilePath& path,
   PK11SlotInfo* db_slot = SECMOD_OpenUserDB(modspec.c_str());
   if (db_slot) {
     if (PK11_NeedUserInit(db_slot))
-      PK11_InitPin(db_slot, NULL, NULL);
+      PK11_InitPin(db_slot, nullptr, nullptr);
   } else {
     LOG(ERROR) << "Error opening persistent database (" << modspec
                << "): " << GetNSSErrorMessage();
@@ -881,7 +881,7 @@ base::Lock* GetNSSWriteLock() {
 }
 
 AutoNSSWriteLock::AutoNSSWriteLock() : lock_(GetNSSWriteLock()) {
-  // May be NULL if the lock is not needed in our version of NSS.
+  // May be nullptr if the lock is not needed in our version of NSS.
   if (lock_)
     lock_->Acquire();
 }

crypto/nss_util_internal.h

@@ -24,7 +24,7 @@ namespace crypto {
 
 // Opens an NSS software database in folder |path|, with the (potentially)
 // user-visible description |description|. Returns the slot for the opened
-// database, or NULL if the database could not be opened.
+// database, or nullptr if the database could not be opened.
 CRYPTO_EXPORT ScopedPK11Slot OpenSoftwareNSSDB(const base::FilePath& path,
                                                const std::string& description);
 
@@ -57,8 +57,8 @@ CRYPTO_EXPORT ScopedPK11Slot GetSystemNSSKeySlot(
 // through |GetSystemNSSKeySlot| and |IsTPMTokenReady| will return true.
 // |InitializeTPMTokenAndSystemSlot|, which triggers the TPM initialization,
 // does not have to be called if the test system slot is set.
-// This must must not be called consecutively with a |slot| != NULL. If |slot|
-// is NULL, the test system slot is unset.
+// This must must not be called consecutively with a |slot| != nullptr. If
+// |slot| is nullptr, the test system slot is unset.
 CRYPTO_EXPORT void SetSystemKeySlotForTesting(ScopedPK11Slot slot);
 
 // Prepare per-user NSS slot mapping. It is safe to call this function multiple

crypto/secure_hash.cc

@@ -9,6 +9,7 @@
 #include <stddef.h>
 
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/pickle.h"
 #include "crypto/openssl_util.h"
 
@@ -40,8 +41,8 @@ class SecureHashSHA256 : public SecureHash {
     SHA256_Final(result.safe_buffer(), &ctx_);
   }
 
-  SecureHash* Clone() const override {
-    return new SecureHashSHA256(*this);
+  std::unique_ptr<SecureHash> Clone() const override {
+    return base::MakeUnique<SecureHashSHA256>(*this);
   }
 
   size_t GetHashLength() const override { return SHA256_DIGEST_LENGTH; }
@@ -52,13 +53,13 @@ class SecureHashSHA256 : public SecureHash {
 
 }  // namespace
 
-SecureHash* SecureHash::Create(Algorithm algorithm) {
+std::unique_ptr<SecureHash> SecureHash::Create(Algorithm algorithm) {
   switch (algorithm) {
     case SHA256:
-      return new SecureHashSHA256();
+      return base::MakeUnique<SecureHashSHA256>();
     default:
       NOTIMPLEMENTED();
-      return NULL;
+      return nullptr;
   }
 }
 

crypto/secure_hash.h

@@ -7,6 +7,8 @@
 
 #include <stddef.h>
 
+#include <memory>
+
 #include "base/macros.h"
 #include "crypto/crypto_export.h"
 
@@ -21,7 +23,7 @@ class CRYPTO_EXPORT SecureHash {
   };
   virtual ~SecureHash() {}
 
-  static SecureHash* Create(Algorithm type);
+  static std::unique_ptr<SecureHash> Create(Algorithm type);
 
   virtual void Update(const void* input, size_t len) = 0;
   virtual void Finish(void* output, size_t len) = 0;
@@ -30,7 +32,7 @@ class CRYPTO_EXPORT SecureHash {
   // Create a clone of this SecureHash. The returned clone and this both
   // represent the same hash state. But from this point on, calling
   // Update()/Finish() on either doesn't affect the state of the other.
-  virtual SecureHash* Clone() const = 0;
+  virtual std::unique_ptr<SecureHash> Clone() const = 0;
 
  protected:
   SecureHash() {}

crypto/signature_creator.cc

@@ -9,8 +9,6 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#include <memory>
-
 #include "base/logging.h"
 #include "crypto/openssl_util.h"
 #include "crypto/rsa_private_key.h"
@@ -27,7 +25,7 @@ const EVP_MD* ToOpenSSLDigest(SignatureCreator::HashAlgorithm hash_alg) {
     case SignatureCreator::SHA256:
       return EVP_sha256();
   }
-  return NULL;
+  return nullptr;
 }
 
 int ToOpenSSLDigestType(SignatureCreator::HashAlgorithm hash_alg) {
@@ -42,21 +40,26 @@ int ToOpenSSLDigestType(SignatureCreator::HashAlgorithm hash_alg) {
 
 }  // namespace
 
+SignatureCreator::~SignatureCreator() {
+  EVP_MD_CTX_destroy(sign_context_);
+}
+
 // static
-SignatureCreator* SignatureCreator::Create(RSAPrivateKey* key,
-                                           HashAlgorithm hash_alg) {
+std::unique_ptr<SignatureCreator> SignatureCreator::Create(
+    RSAPrivateKey* key,
+    HashAlgorithm hash_alg) {
   OpenSSLErrStackTracer err_tracer(FROM_HERE);
   std::unique_ptr<SignatureCreator> result(new SignatureCreator);
   const EVP_MD* const digest = ToOpenSSLDigest(hash_alg);
   DCHECK(digest);
   if (!digest) {
-    return NULL;
+    return nullptr;
   }
-  if (!EVP_DigestSignInit(result->sign_context_, NULL, digest, NULL,
+  if (!EVP_DigestSignInit(result->sign_context_, nullptr, digest, nullptr,
                           key->key())) {
-    return NULL;
+    return nullptr;
   }
-  return result.release();
+  return result;
 }
 
 // static
@@ -80,14 +83,6 @@ bool SignatureCreator::Sign(RSAPrivateKey* key,
   return true;
 }
 
-SignatureCreator::SignatureCreator()
-    : sign_context_(EVP_MD_CTX_create()) {
-}
-
-SignatureCreator::~SignatureCreator() {
-  EVP_MD_CTX_destroy(sign_context_);
-}
-
 bool SignatureCreator::Update(const uint8_t* data_part, int data_part_len) {
   OpenSSLErrStackTracer err_tracer(FROM_HERE);
   return !!EVP_DigestSignUpdate(sign_context_, data_part, data_part_len);
@@ -98,7 +93,7 @@ bool SignatureCreator::Final(std::vector<uint8_t>* signature) {
 
   // Determine the maximum length of the signature.
   size_t len = 0;
-  if (!EVP_DigestSignFinal(sign_context_, NULL, &len)) {
+  if (!EVP_DigestSignFinal(sign_context_, nullptr, &len)) {
     signature->clear();
     return false;
   }
@@ -113,4 +108,6 @@ bool SignatureCreator::Final(std::vector<uint8_t>* signature) {
   return true;
 }
 
+SignatureCreator::SignatureCreator() : sign_context_(EVP_MD_CTX_create()) {}
+
 }  // namespace crypto

crypto/signature_creator.h

@@ -7,6 +7,7 @@
 
 #include <stdint.h>
 
+#include <memory>
 #include <vector>
 
 #include "base/macros.h"
@@ -35,8 +36,8 @@ class CRYPTO_EXPORT SignatureCreator {
   // Create an instance. The caller must ensure that the provided PrivateKey
   // instance outlives the created SignatureCreator. Uses the HashAlgorithm
   // specified.
-  static SignatureCreator* Create(RSAPrivateKey* key, HashAlgorithm hash_alg);
-
+  static std::unique_ptr<SignatureCreator> Create(RSAPrivateKey* key,
+                                                  HashAlgorithm hash_alg);
 
   // Signs the precomputed |hash_alg| digest |data| using private |key| as
   // specified in PKCS #1 v1.5.

crypto/signature_verifier.cc

@@ -27,7 +27,7 @@ const EVP_MD* ToOpenSSLDigest(SignatureVerifier::HashAlgorithm hash_alg) {
     case SignatureVerifier::SHA256:
       return EVP_sha256();
   }
-  return NULL;
+  return nullptr;
 }
 
 }  // namespace
@@ -36,9 +36,7 @@ struct SignatureVerifier::VerifyContext {
   ScopedEVP_MD_CTX ctx;
 };
 
-SignatureVerifier::SignatureVerifier()
-    : verify_context_(NULL) {
-}
+SignatureVerifier::SignatureVerifier() : verify_context_(nullptr) {}
 
 SignatureVerifier::~SignatureVerifier() {
   Reset();
@@ -153,7 +151,7 @@ bool SignatureVerifier::CommonInit(int pkey_type,
 
 void SignatureVerifier::Reset() {
   delete verify_context_;
-  verify_context_ = NULL;
+  verify_context_ = nullptr;
   signature_.clear();
 }
 

crypto/symmetric_key.cc

@@ -10,7 +10,7 @@
 #include <stdint.h>
 
 #include <algorithm>
-#include <memory>
+#include <utility>
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
@@ -23,21 +23,22 @@ SymmetricKey::~SymmetricKey() {
 }
 
 // static
-SymmetricKey* SymmetricKey::GenerateRandomKey(Algorithm algorithm,
-                                              size_t key_size_in_bits) {
+std::unique_ptr<SymmetricKey> SymmetricKey::GenerateRandomKey(
+    Algorithm algorithm,
+    size_t key_size_in_bits) {
   DCHECK_EQ(AES, algorithm);
 
   // Whitelist supported key sizes to avoid accidentaly relying on
   // algorithms available in NSS but not BoringSSL and vice
   // versa. Note that BoringSSL does not support AES-192.
   if (key_size_in_bits != 128 && key_size_in_bits != 256)
-    return NULL;
+    return nullptr;
 
   size_t key_size_in_bytes = key_size_in_bits / 8;
   DCHECK_EQ(key_size_in_bits, key_size_in_bytes * 8);
 
   if (key_size_in_bytes == 0)
-    return NULL;
+    return nullptr;
 
   OpenSSLErrStackTracer err_tracer(FROM_HERE);
   std::unique_ptr<SymmetricKey> key(new SymmetricKey);
@@ -45,15 +46,16 @@ SymmetricKey* SymmetricKey::GenerateRandomKey(Algorithm algorithm,
       base::WriteInto(&key->key_, key_size_in_bytes + 1));
 
   int rv = RAND_bytes(key_data, static_cast<int>(key_size_in_bytes));
-  return rv == 1 ? key.release() : NULL;
+  return rv == 1 ? std::move(key) : nullptr;
 }
 
 // static
-SymmetricKey* SymmetricKey::DeriveKeyFromPassword(Algorithm algorithm,
-                                                  const std::string& password,
-                                                  const std::string& salt,
-                                                  size_t iterations,
-                                                  size_t key_size_in_bits) {
+std::unique_ptr<SymmetricKey> SymmetricKey::DeriveKeyFromPassword(
+    Algorithm algorithm,
+    const std::string& password,
+    const std::string& salt,
+    size_t iterations,
+    size_t key_size_in_bits) {
   DCHECK(algorithm == AES || algorithm == HMAC_SHA1);
 
   if (algorithm == AES) {
@@ -61,14 +63,14 @@ SymmetricKey* SymmetricKey::DeriveKeyFromPassword(Algorithm algorithm,
     // algorithms available in NSS but not BoringSSL and vice
     // versa. Note that BoringSSL does not support AES-192.
     if (key_size_in_bits != 128 && key_size_in_bits != 256)
-      return NULL;
+      return nullptr;
   }
 
   size_t key_size_in_bytes = key_size_in_bits / 8;
   DCHECK_EQ(key_size_in_bits, key_size_in_bytes * 8);
 
   if (key_size_in_bytes == 0)
-    return NULL;
+    return nullptr;
 
   OpenSSLErrStackTracer err_tracer(FROM_HERE);
   std::unique_ptr<SymmetricKey> key(new SymmetricKey);
@@ -79,23 +81,23 @@ SymmetricKey* SymmetricKey::DeriveKeyFromPassword(Algorithm algorithm,
       reinterpret_cast<const uint8_t*>(salt.data()), salt.length(),
       static_cast<unsigned>(iterations),
       key_size_in_bytes, key_data);
-  return rv == 1 ? key.release() : NULL;
+  return rv == 1 ? std::move(key) : nullptr;
 }
 
 // static
-SymmetricKey* SymmetricKey::Import(Algorithm algorithm,
-                                   const std::string& raw_key) {
+std::unique_ptr<SymmetricKey> SymmetricKey::Import(Algorithm algorithm,
+                                                   const std::string& raw_key) {
   if (algorithm == AES) {
     // Whitelist supported key sizes to avoid accidentaly relying on
     // algorithms available in NSS but not BoringSSL and vice
     // versa. Note that BoringSSL does not support AES-192.
     if (raw_key.size() != 128/8 && raw_key.size() != 256/8)
-      return NULL;
+      return nullptr;
   }
 
   std::unique_ptr<SymmetricKey> key(new SymmetricKey);
   key->key_ = raw_key;
-  return key.release();
+  return key;
 }
 
 bool SymmetricKey::GetRawKey(std::string* raw_key) {
@@ -103,4 +105,6 @@ bool SymmetricKey::GetRawKey(std::string* raw_key) {
   return true;
 }
 
+SymmetricKey::SymmetricKey() = default;
+
 }  // namespace crypto

crypto/symmetric_key.h

@@ -7,6 +7,7 @@
 
 #include <stddef.h>
 
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
@@ -31,25 +32,28 @@ class CRYPTO_EXPORT SymmetricKey {
   // Generates a random key suitable to be used with |algorithm| and of
   // |key_size_in_bits| bits. |key_size_in_bits| must be a multiple of 8.
   // The caller is responsible for deleting the returned SymmetricKey.
-  static SymmetricKey* GenerateRandomKey(Algorithm algorithm,
-                                         size_t key_size_in_bits);
+  static std::unique_ptr<SymmetricKey> GenerateRandomKey(
+      Algorithm algorithm,
+      size_t key_size_in_bits);
 
   // Derives a key from the supplied password and salt using PBKDF2, suitable
   // for use with specified |algorithm|. Note |algorithm| is not the algorithm
   // used to derive the key from the password. |key_size_in_bits| must be a
   // multiple of 8. The caller is responsible for deleting the returned
   // SymmetricKey.
-  static SymmetricKey* DeriveKeyFromPassword(Algorithm algorithm,
-                                             const std::string& password,
-                                             const std::string& salt,
-                                             size_t iterations,
-                                             size_t key_size_in_bits);
+  static std::unique_ptr<SymmetricKey> DeriveKeyFromPassword(
+      Algorithm algorithm,
+      const std::string& password,
+      const std::string& salt,
+      size_t iterations,
+      size_t key_size_in_bits);
 
   // Imports an array of key bytes in |raw_key|. This key may have been
   // generated by GenerateRandomKey or DeriveKeyFromPassword and exported with
   // GetRawKey, or via another compatible method. The key must be of suitable
   // size for use with |algorithm|. The caller owns the returned SymmetricKey.
-  static SymmetricKey* Import(Algorithm algorithm, const std::string& raw_key);
+  static std::unique_ptr<SymmetricKey> Import(Algorithm algorithm,
+                                              const std::string& raw_key);
 
   const std::string& key() { return key_; }
 
@@ -59,7 +63,8 @@ class CRYPTO_EXPORT SymmetricKey {
   bool GetRawKey(std::string* raw_key);
 
  private:
-  SymmetricKey() {}
+  SymmetricKey();
+
   std::string key_;
 
   DISALLOW_COPY_AND_ASSIGN(SymmetricKey);

crypto/symmetric_key_unittest.cc

@@ -14,7 +14,7 @@
 TEST(SymmetricKeyTest, GenerateRandomKey) {
   std::unique_ptr<crypto::SymmetricKey> key(
       crypto::SymmetricKey::GenerateRandomKey(crypto::SymmetricKey::AES, 256));
-  ASSERT_TRUE(NULL != key.get());
+  ASSERT_TRUE(key);
   std::string raw_key;
   EXPECT_TRUE(key->GetRawKey(&raw_key));
   EXPECT_EQ(32U, raw_key.size());
@@ -23,7 +23,7 @@ TEST(SymmetricKeyTest, GenerateRandomKey) {
   // (Note: this has a one-in-10^77 chance of failure!)
   std::unique_ptr<crypto::SymmetricKey> key2(
       crypto::SymmetricKey::GenerateRandomKey(crypto::SymmetricKey::AES, 256));
-  ASSERT_TRUE(NULL != key2.get());
+  ASSERT_TRUE(key2);
   std::string raw_key2;
   EXPECT_TRUE(key2->GetRawKey(&raw_key2));
   EXPECT_EQ(32U, raw_key2.size());
@@ -33,13 +33,13 @@ TEST(SymmetricKeyTest, GenerateRandomKey) {
 TEST(SymmetricKeyTest, ImportGeneratedKey) {
   std::unique_ptr<crypto::SymmetricKey> key1(
       crypto::SymmetricKey::GenerateRandomKey(crypto::SymmetricKey::AES, 256));
-  ASSERT_TRUE(NULL != key1.get());
+  ASSERT_TRUE(key1);
   std::string raw_key1;
   EXPECT_TRUE(key1->GetRawKey(&raw_key1));
 
   std::unique_ptr<crypto::SymmetricKey> key2(
       crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, raw_key1));
-  ASSERT_TRUE(NULL != key2.get());
+  ASSERT_TRUE(key2);
 
   std::string raw_key2;
   EXPECT_TRUE(key2->GetRawKey(&raw_key2));
@@ -51,13 +51,13 @@ TEST(SymmetricKeyTest, ImportDerivedKey) {
   std::unique_ptr<crypto::SymmetricKey> key1(
       crypto::SymmetricKey::DeriveKeyFromPassword(
           crypto::SymmetricKey::HMAC_SHA1, "password", "somesalt", 1024, 160));
-  ASSERT_TRUE(NULL != key1.get());
+  ASSERT_TRUE(key1);
   std::string raw_key1;
   EXPECT_TRUE(key1->GetRawKey(&raw_key1));
 
   std::unique_ptr<crypto::SymmetricKey> key2(
       crypto::SymmetricKey::Import(crypto::SymmetricKey::HMAC_SHA1, raw_key1));
-  ASSERT_TRUE(NULL != key2.get());
+  ASSERT_TRUE(key2);
 
   std::string raw_key2;
   EXPECT_TRUE(key2->GetRawKey(&raw_key2));
@@ -84,7 +84,7 @@ TEST_P(SymmetricKeyDeriveKeyFromPasswordTest, DeriveKeyFromPassword) {
       crypto::SymmetricKey::DeriveKeyFromPassword(
           test_data.algorithm, test_data.password, test_data.salt,
           test_data.rounds, test_data.key_size_in_bits));
-  ASSERT_TRUE(NULL != key.get());
+  ASSERT_TRUE(key);
 
   std::string raw_key;
   key->GetRawKey(&raw_key);

crypto/wincrypt_shim.h

@@ -22,4 +22,4 @@
 #define WINCRYPT_X509_EXTENSIONS ((LPCSTR) 5)
 #define WINCRYPT_X509_NAME ((LPCSTR) 7)
 
-#endif  // NET_CRYPTO_WINCRYPT_SHIM_H_
+#endif  // NET_CRYPTO_WINCRYPT_SHIM_H_

extensions/browser/content_verify_job.cc

@@ -96,10 +96,9 @@ void ContentVerifyJob::BytesRead(int count, const char* data) {
     if (current_block_ >= hash_reader_->block_count())
       return DispatchFailureCallback(HASH_MISMATCH);
 
-    if (!current_hash_.get()) {
+    if (!current_hash_) {
       current_hash_byte_count_ = 0;
-      current_hash_.reset(
-          crypto::SecureHash::Create(crypto::SecureHash::SHA256));
+      current_hash_ = crypto::SecureHash::Create(crypto::SecureHash::SHA256);
     }
     // Compute how many bytes we should hash, and add them to the current hash.
     int bytes_to_hash =

media/cast/common/transport_encryption_handler.cc

@@ -51,8 +51,7 @@ bool TransportEncryptionHandler::Initialize(const std::string& aes_key,
   is_activated_ = false;
   if (aes_iv_mask.size() == kAesKeySize && aes_key.size() == kAesKeySize) {
     iv_mask_ = aes_iv_mask;
-    key_.reset(
-        crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, aes_key));
+    key_ = crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, aes_key);
     encryptor_.reset(new crypto::Encryptor());
     encryptor_->Init(key_.get(), crypto::Encryptor::CTR, std::string());
     is_activated_ = true;

media/cdm/aes_decryptor.cc

@@ -481,9 +481,8 @@ void AesDecryptor::Decrypt(StreamType stream_type,
       return;
     }
 
-    crypto::SymmetricKey* decryption_key = key->decryption_key();
-    decrypted = DecryptData(*encrypted.get(), decryption_key);
-    if (!decrypted.get()) {
+    decrypted = DecryptData(*encrypted.get(), key->decryption_key());
+    if (!decrypted) {
       DVLOG(1) << "Decryption failed.";
       decrypt_cb.Run(kError, NULL);
       return;
@@ -607,8 +606,8 @@ AesDecryptor::DecryptionKey::~DecryptionKey() {}
 
 bool AesDecryptor::DecryptionKey::Init() {
   CHECK(!secret_.empty());
-  decryption_key_.reset(crypto::SymmetricKey::Import(
-      crypto::SymmetricKey::AES, secret_));
+  decryption_key_ =
+      crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, secret_);
   if (!decryption_key_)
     return false;
   return true;

net/extras/sqlite/sqlite_channel_id_store_unittest.cc

@@ -10,7 +10,6 @@
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
-#include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ -66,8 +65,8 @@ class SQLiteChannelIDStoreTest : public testing::Test {
     ASSERT_TRUE(asn1::ExtractSPKIFromDERCert(*cert_data, &spki));
     std::vector<uint8_t> public_key(spki.size());
     memcpy(public_key.data(), spki.data(), spki.size());
-    key->reset(crypto::ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
-        ChannelIDService::kEPKIPassword, private_key, public_key));
+    *key = crypto::ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
+        ChannelIDService::kEPKIPassword, private_key, public_key);
   }
 
   static base::Time GetTestCertExpirationTime() {
@@ -111,10 +110,9 @@ class SQLiteChannelIDStoreTest : public testing::Test {
     Load(&channel_ids);
     ASSERT_EQ(0u, channel_ids.size());
     // Make sure the store gets written at least once.
-    google_key_.reset(crypto::ECPrivateKey::Create());
+    google_key_ = crypto::ECPrivateKey::Create();
     store_->AddChannelID(DefaultChannelIDStore::ChannelID(
-        "google.com", base::Time::FromInternalValue(1),
-        base::WrapUnique(google_key_->Copy())));
+        "google.com", base::Time::FromInternalValue(1), google_key_->Copy()));
   }
 
   base::ScopedTempDir temp_dir_;
@@ -127,8 +125,7 @@ class SQLiteChannelIDStoreTest : public testing::Test {
 TEST_F(SQLiteChannelIDStoreTest, TestPersistence) {
   std::unique_ptr<crypto::ECPrivateKey> foo_key(crypto::ECPrivateKey::Create());
   store_->AddChannelID(DefaultChannelIDStore::ChannelID(
-      "foo.com", base::Time::FromInternalValue(3),
-      base::WrapUnique(foo_key->Copy())));
+      "foo.com", base::Time::FromInternalValue(3), foo_key->Copy()));
 
   std::vector<std::unique_ptr<DefaultChannelIDStore::ChannelID>> channel_ids;
   // Replace the store effectively destroying the current one and forcing it
@@ -184,7 +181,7 @@ TEST_F(SQLiteChannelIDStoreTest, TestPersistence) {
 TEST_F(SQLiteChannelIDStoreTest, TestDeleteAll) {
   store_->AddChannelID(DefaultChannelIDStore::ChannelID(
       "foo.com", base::Time::FromInternalValue(3),
-      base::WrapUnique(crypto::ECPrivateKey::Create())));
+      crypto::ECPrivateKey::Create()));
 
   std::vector<std::unique_ptr<DefaultChannelIDStore::ChannelID>> channel_ids;
   // Replace the store effectively destroying the current one and forcing it

net/spdy/spdy_test_util_common.cc

@@ -7,7 +7,6 @@
 #include <stdint.h>
 
 #include <cstddef>
-#include <memory>
 #include <utility>
 
 #include "base/compiler_specific.h"
@@ -324,12 +323,12 @@ MockECSignatureCreatorFactory::MockECSignatureCreatorFactory() {
 }
 
 MockECSignatureCreatorFactory::~MockECSignatureCreatorFactory() {
-  crypto::ECSignatureCreator::SetFactoryForTesting(NULL);
+  crypto::ECSignatureCreator::SetFactoryForTesting(nullptr);
 }
 
-crypto::ECSignatureCreator* MockECSignatureCreatorFactory::Create(
-    crypto::ECPrivateKey* key) {
-  return new MockECSignatureCreator(key);
+std::unique_ptr<crypto::ECSignatureCreator>
+MockECSignatureCreatorFactory::Create(crypto::ECPrivateKey* key) {
+  return base::MakeUnique<MockECSignatureCreator>(key);
 }
 
 SpdySessionDependencies::SpdySessionDependencies(NextProto protocol)

net/spdy/spdy_test_util_common.h

@@ -164,7 +164,8 @@ class MockECSignatureCreatorFactory : public crypto::ECSignatureCreatorFactory {
   ~MockECSignatureCreatorFactory() override;
 
   // crypto::ECSignatureCreatorFactory
-  crypto::ECSignatureCreator* Create(crypto::ECPrivateKey* key) override;
+  std::unique_ptr<crypto::ECSignatureCreator> Create(
+      crypto::ECPrivateKey* key) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockECSignatureCreatorFactory);

net/ssl/channel_id_service.cc

@@ -192,7 +192,7 @@ class ChannelIDServiceJob {
          i != requests.end(); i++) {
       std::unique_ptr<crypto::ECPrivateKey> key_copy;
       if (key)
-        key_copy.reset(key->Copy());
+        key_copy = key->Copy();
       (*i)->Post(error, std::move(key_copy));
     }
   }
@@ -439,7 +439,7 @@ void ChannelIDService::GeneratedChannelID(
 
   std::unique_ptr<crypto::ECPrivateKey> key;
   if (error == OK) {
-    key.reset(channel_id->key()->Copy());
+    key = channel_id->key()->Copy();
     channel_id_store_->SetChannelID(std::move(channel_id));
   }
   HandleResult(error, server_identifier, std::move(key));

net/ssl/channel_id_service_unittest.cc

@@ -11,7 +11,6 @@
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/macros.h"
-#include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
@@ -100,9 +99,8 @@ void MockChannelIDStoreWithAsyncGet::CallGetChannelIDCallbackWithResult(
   if (err == OK)
     channel_id_count_ = 1;
   base::ThreadTaskRunnerHandle::Get()->PostTask(
-      FROM_HERE,
-      base::Bind(callback_, err, server_identifier_,
-                 base::Passed(base::WrapUnique(key ? key->Copy() : nullptr))));
+      FROM_HERE, base::Bind(callback_, err, server_identifier_,
+                            base::Passed(key ? key->Copy() : nullptr)));
 }
 
 class ChannelIDServiceTest : public testing::Test {

net/ssl/channel_id_store.cc

@@ -33,7 +33,7 @@ ChannelIDStore::ChannelID& ChannelIDStore::ChannelID::operator=(
   server_identifier_ = other.server_identifier_;
   creation_time_ = other.creation_time_;
   if (other.key_)
-    key_.reset(other.key_->Copy());
+    key_ = other.key_->Copy();
   return *this;
 }
 

net/ssl/default_channel_id_store.cc

@@ -242,7 +242,7 @@ int DefaultChannelIDStore::GetChannelID(
     return ERR_FILE_NOT_FOUND;
 
   ChannelID* channel_id = it->second;
-  key_result->reset(channel_id->key()->Copy());
+  *key_result = channel_id->key()->Copy();
 
   return OK;
 }
@@ -290,7 +290,7 @@ void DefaultChannelIDStore::SetForceKeepSessionState() {
   DCHECK(CalledOnValidThread());
   InitIfNecessary();
 
-  if (store_.get())
+  if (store_)
     store_->SetForceKeepSessionState();
 }
 
@@ -310,7 +310,7 @@ void DefaultChannelIDStore::DeleteAllInMemory() {
 
 void DefaultChannelIDStore::InitStore() {
   DCHECK(CalledOnValidThread());
-  DCHECK(store_.get()) << "Store must exist to initialize";
+  DCHECK(store_) << "Store must exist to initialize";
   DCHECK(!loaded_);
 
   store_->Load(base::Bind(&DefaultChannelIDStore::OnLoaded,
@@ -381,7 +381,7 @@ void DefaultChannelIDStore::SyncDeleteForDomainsCreatedBetween(
          channel_id->creation_time() >= delete_begin) &&
         (delete_end.is_null() || channel_id->creation_time() < delete_end) &&
         domain_predicate.Run(channel_id->server_identifier())) {
-      if (store_.get())
+      if (store_)
         store_->DeleteChannelID(*channel_id);
       delete channel_id;
       channel_ids_.erase(cur);
@@ -428,7 +428,7 @@ void DefaultChannelIDStore::InternalDeleteChannelID(
     return;  // There is nothing to delete.
 
   ChannelID* channel_id = it->second;
-  if (store_.get())
+  if (store_)
     store_->DeleteChannelID(*channel_id);
   channel_ids_.erase(it);
   delete channel_id;
@@ -439,14 +439,14 @@ void DefaultChannelIDStore::InternalInsertChannelID(
   DCHECK(CalledOnValidThread());
   DCHECK(loaded_);
 
-  if (store_.get())
-    store_->AddChannelID(*(channel_id.get()));
+  if (store_)
+    store_->AddChannelID(*channel_id);
   const std::string& server_identifier = channel_id->server_identifier();
   channel_ids_[server_identifier] = channel_id.release();
 }
 
 bool DefaultChannelIDStore::IsEphemeral() {
-  return store_.get() == nullptr;
+  return !store_;
 }
 
 DefaultChannelIDStore::PersistentStore::PersistentStore() {}

net/ssl/default_channel_id_store_unittest.cc

@@ -132,25 +132,21 @@ TEST(DefaultChannelIDStoreTest, TestLoading) {
   scoped_refptr<MockPersistentStore> persistent_store(new MockPersistentStore);
 
   persistent_store->AddChannelID(DefaultChannelIDStore::ChannelID(
-      "google.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create())));
+      "google.com", base::Time(), crypto::ECPrivateKey::Create()));
   persistent_store->AddChannelID(DefaultChannelIDStore::ChannelID(
-      "verisign.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create())));
+      "verisign.com", base::Time(), crypto::ECPrivateKey::Create()));
 
   // Make sure channel_ids load properly.
   DefaultChannelIDStore store(persistent_store.get());
   // Load has not occurred yet.
   EXPECT_EQ(0, store.GetChannelIDCount());
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "verisign.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "verisign.com", base::Time(), crypto::ECPrivateKey::Create())));
   // Wait for load & queued set task.
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(2, store.GetChannelIDCount());
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "twitter.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "twitter.com", base::Time(), crypto::ECPrivateKey::Create())));
   // Set should be synchronous now that load is done.
   EXPECT_EQ(3, store.GetChannelIDCount());
 }
@@ -170,7 +166,7 @@ TEST(DefaultChannelIDStoreTest, TestSettingAndGetting) {
   EXPECT_FALSE(key);
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
       "verisign.com", base::Time::FromInternalValue(123),
-      base::WrapUnique(expected_key->Copy()))));
+      expected_key->Copy())));
   EXPECT_EQ(OK, store.GetChannelID("verisign.com", &key,
                                    base::Bind(&GetChannelIDCallbackNotCalled)));
   EXPECT_TRUE(KeysEqual(expected_key.get(), key.get()));
@@ -186,10 +182,10 @@ TEST(DefaultChannelIDStoreTest, TestDuplicateChannelIds) {
   EXPECT_EQ(0, store.GetChannelIDCount());
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
       "verisign.com", base::Time::FromInternalValue(123),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      crypto::ECPrivateKey::Create())));
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
       "verisign.com", base::Time::FromInternalValue(456),
-      base::WrapUnique(expected_key->Copy()))));
+      expected_key->Copy())));
 
   // Wait for load & queued set tasks.
   base::RunLoop().RunUntilIdle();
@@ -205,7 +201,7 @@ TEST(DefaultChannelIDStoreTest, TestAsyncGet) {
       crypto::ECPrivateKey::Create());
   persistent_store->AddChannelID(ChannelIDStore::ChannelID(
       "verisign.com", base::Time::FromInternalValue(123),
-      base::WrapUnique(expected_key->Copy())));
+      expected_key->Copy()));
 
   DefaultChannelIDStore store(persistent_store.get());
   AsyncGetChannelIDHelper helper;
@@ -231,14 +227,11 @@ TEST(DefaultChannelIDStoreTest, TestDeleteAll) {
   DefaultChannelIDStore store(persistent_store.get());
 
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "verisign.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "verisign.com", base::Time(), crypto::ECPrivateKey::Create())));
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "google.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "google.com", base::Time(), crypto::ECPrivateKey::Create())));
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "harvard.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "harvard.com", base::Time(), crypto::ECPrivateKey::Create())));
   // Wait for load & queued set tasks.
   base::RunLoop().RunUntilIdle();
 
@@ -254,14 +247,11 @@ TEST(DefaultChannelIDStoreTest, TestDeleteForDomains) {
   DefaultChannelIDStore store(persistent_store.get());
 
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "verisign.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "verisign.com", base::Time(), crypto::ECPrivateKey::Create())));
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "google.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "google.com", base::Time(), crypto::ECPrivateKey::Create())));
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "harvard.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "harvard.com", base::Time(), crypto::ECPrivateKey::Create())));
   // Wait for load & queued set tasks.
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(3, store.GetChannelIDCount());
@@ -293,11 +283,9 @@ TEST(DefaultChannelIDStoreTest, TestDeleteForDomains) {
 TEST(DefaultChannelIDStoreTest, TestAsyncGetAndDeleteAll) {
   scoped_refptr<MockPersistentStore> persistent_store(new MockPersistentStore);
   persistent_store->AddChannelID(ChannelIDStore::ChannelID(
-      "verisign.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create())));
+      "verisign.com", base::Time(), crypto::ECPrivateKey::Create()));
   persistent_store->AddChannelID(ChannelIDStore::ChannelID(
-      "google.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create())));
+      "google.com", base::Time(), crypto::ECPrivateKey::Create()));
 
   ChannelIDStore::ChannelIDList pre_channel_ids;
   ChannelIDStore::ChannelIDList post_channel_ids;
@@ -323,14 +311,12 @@ TEST(DefaultChannelIDStoreTest, TestDelete) {
   std::unique_ptr<crypto::ECPrivateKey> key;
   EXPECT_EQ(0, store.GetChannelIDCount());
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "verisign.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "verisign.com", base::Time(), crypto::ECPrivateKey::Create())));
   // Wait for load & queued set task.
   base::RunLoop().RunUntilIdle();
 
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "google.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "google.com", base::Time(), crypto::ECPrivateKey::Create())));
 
   EXPECT_EQ(2, store.GetChannelIDCount());
   int delete_finished = 0;
@@ -357,12 +343,11 @@ TEST(DefaultChannelIDStoreTest, TestAsyncDelete) {
   scoped_refptr<MockPersistentStore> persistent_store(new MockPersistentStore);
   std::unique_ptr<crypto::ECPrivateKey> expected_key(
       crypto::ECPrivateKey::Create());
-  persistent_store->AddChannelID(ChannelIDStore::ChannelID(
-      "a.com", base::Time::FromInternalValue(1),
-      base::WrapUnique(crypto::ECPrivateKey::Create())));
   persistent_store->AddChannelID(
-      ChannelIDStore::ChannelID("b.com", base::Time::FromInternalValue(3),
-                                base::WrapUnique(expected_key->Copy())));
+      ChannelIDStore::ChannelID("a.com", base::Time::FromInternalValue(1),
+                                crypto::ECPrivateKey::Create()));
+  persistent_store->AddChannelID(ChannelIDStore::ChannelID(
+      "b.com", base::Time::FromInternalValue(3), expected_key->Copy()));
   DefaultChannelIDStore store(persistent_store.get());
   int delete_finished = 0;
   store.DeleteChannelID("a.com",
@@ -405,17 +390,13 @@ TEST(DefaultChannelIDStoreTest, TestGetAll) {
 
   EXPECT_EQ(0, store.GetChannelIDCount());
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "verisign.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "verisign.com", base::Time(), crypto::ECPrivateKey::Create())));
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "google.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "google.com", base::Time(), crypto::ECPrivateKey::Create())));
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "harvard.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "harvard.com", base::Time(), crypto::ECPrivateKey::Create())));
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "mit.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "mit.com", base::Time(), crypto::ECPrivateKey::Create())));
   // Wait for load & queued set tasks.
   base::RunLoop().RunUntilIdle();
 
@@ -436,11 +417,9 @@ TEST(DefaultChannelIDStoreTest, TestInitializeFrom) {
       crypto::ECPrivateKey::Create());
 
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "preexisting.com", base::Time(),
-      base::WrapUnique(preexisting_key->Copy()))));
+      "preexisting.com", base::Time(), preexisting_key->Copy())));
   store.SetChannelID(base::WrapUnique(new ChannelIDStore::ChannelID(
-      "both.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create()))));
+      "both.com", base::Time(), crypto::ECPrivateKey::Create())));
   // Wait for load & queued set tasks.
   base::RunLoop().RunUntilIdle();
   EXPECT_EQ(2, store.GetChannelIDCount());
@@ -449,9 +428,9 @@ TEST(DefaultChannelIDStoreTest, TestInitializeFrom) {
   source_channel_ids.push_back(ChannelIDStore::ChannelID(
       "both.com", base::Time(),
       // Key differs from above to test that existing entries are overwritten.
-      base::WrapUnique(both_key->Copy())));
+      both_key->Copy()));
   source_channel_ids.push_back(ChannelIDStore::ChannelID(
-      "copied.com", base::Time(), base::WrapUnique(copied_key->Copy())));
+      "copied.com", base::Time(), copied_key->Copy()));
   store.InitializeFrom(source_channel_ids);
   EXPECT_EQ(3, store.GetChannelIDCount());
 
@@ -481,21 +460,19 @@ TEST(DefaultChannelIDStoreTest, TestAsyncInitializeFrom) {
   std::unique_ptr<crypto::ECPrivateKey> copied_key(
       crypto::ECPrivateKey::Create());
 
-  persistent_store->AddChannelID(
-      ChannelIDStore::ChannelID("preexisting.com", base::Time(),
-                                base::WrapUnique(preexisting_key->Copy())));
   persistent_store->AddChannelID(ChannelIDStore::ChannelID(
-      "both.com", base::Time(),
-      base::WrapUnique(crypto::ECPrivateKey::Create())));
+      "preexisting.com", base::Time(), preexisting_key->Copy()));
+  persistent_store->AddChannelID(ChannelIDStore::ChannelID(
+      "both.com", base::Time(), crypto::ECPrivateKey::Create()));
 
   DefaultChannelIDStore store(persistent_store.get());
   ChannelIDStore::ChannelIDList source_channel_ids;
   source_channel_ids.push_back(ChannelIDStore::ChannelID(
       "both.com", base::Time(),
       // Key differs from above to test that existing entries are overwritten.
-      base::WrapUnique(both_key->Copy())));
+      both_key->Copy()));
   source_channel_ids.push_back(ChannelIDStore::ChannelID(
-      "copied.com", base::Time(), base::WrapUnique(copied_key->Copy())));
+      "copied.com", base::Time(), copied_key->Copy()));
   store.InitializeFrom(source_channel_ids);
   EXPECT_EQ(0, store.GetChannelIDCount());
   // Wait for load & queued tasks.

sync/util/nigori.cc

@@ -77,45 +77,46 @@ bool Nigori::InitByDerivation(const std::string& hostname,
   std::unique_ptr<SymmetricKey> user_salt(SymmetricKey::DeriveKeyFromPassword(
       SymmetricKey::HMAC_SHA1, salt_password.str(), kSaltSalt, kSaltIterations,
       kSaltKeySizeInBits));
-  DCHECK(user_salt.get());
+  DCHECK(user_salt);
 
   std::string raw_user_salt;
   if (!user_salt->GetRawKey(&raw_user_salt))
     return false;
 
   // Kuser = PBKDF2(P, Suser, Nuser, 16)
-  user_key_.reset(SymmetricKey::DeriveKeyFromPassword(SymmetricKey::AES,
-      password, raw_user_salt, kUserIterations, kDerivedKeySizeInBits));
-  DCHECK(user_key_.get());
+  user_key_ = SymmetricKey::DeriveKeyFromPassword(
+      SymmetricKey::AES, password, raw_user_salt, kUserIterations,
+      kDerivedKeySizeInBits);
+  DCHECK(user_key_);
 
   // Kenc = PBKDF2(P, Suser, Nenc, 16)
-  encryption_key_.reset(SymmetricKey::DeriveKeyFromPassword(SymmetricKey::AES,
-      password, raw_user_salt, kEncryptionIterations, kDerivedKeySizeInBits));
-  DCHECK(encryption_key_.get());
+  encryption_key_ = SymmetricKey::DeriveKeyFromPassword(
+      SymmetricKey::AES, password, raw_user_salt, kEncryptionIterations,
+      kDerivedKeySizeInBits);
+  DCHECK(encryption_key_);
 
   // Kmac = PBKDF2(P, Suser, Nmac, 16)
-  mac_key_.reset(SymmetricKey::DeriveKeyFromPassword(
+  mac_key_ = SymmetricKey::DeriveKeyFromPassword(
       SymmetricKey::HMAC_SHA1, password, raw_user_salt, kSigningIterations,
-      kDerivedKeySizeInBits));
-  DCHECK(mac_key_.get());
+      kDerivedKeySizeInBits);
+  DCHECK(mac_key_);
 
-  return user_key_.get() && encryption_key_.get() && mac_key_.get();
+  return user_key_ && encryption_key_ && mac_key_;
 }
 
 bool Nigori::InitByImport(const std::string& user_key,
                           const std::string& encryption_key,
                           const std::string& mac_key) {
-  user_key_.reset(SymmetricKey::Import(SymmetricKey::AES, user_key));
-  DCHECK(user_key_.get());
+  user_key_ = SymmetricKey::Import(SymmetricKey::AES, user_key);
+  DCHECK(user_key_);
 
-  encryption_key_.reset(SymmetricKey::Import(SymmetricKey::AES,
-                                             encryption_key));
-  DCHECK(encryption_key_.get());
+  encryption_key_ = SymmetricKey::Import(SymmetricKey::AES, encryption_key);
+  DCHECK(encryption_key_);
 
-  mac_key_.reset(SymmetricKey::Import(SymmetricKey::HMAC_SHA1, mac_key));
-  DCHECK(mac_key_.get());
+  mac_key_ = SymmetricKey::Import(SymmetricKey::HMAC_SHA1, mac_key);
+  DCHECK(mac_key_);
 
-  return user_key_.get() && encryption_key_.get() && mac_key_.get();
+  return user_key_ && encryption_key_ && mac_key_;
 }
 
 // Permute[Kenc,Kmac](type || name)