crypto/encryptor_unittest.cc - chromium/src - Git at Google

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "crypto/encryptor.h"

 #include <string>

 #include "base/memory/scoped_ptr.h"
 #include "base/string_number_conversions.h"
 #include "crypto/symmetric_key.h"
 #include "testing/gtest/include/gtest/gtest.h"

 TEST(EncryptorTest, EncryptDecrypt) {
   scoped_ptr<crypto::SymmetricKey> key(
       crypto::SymmetricKey::DeriveKeyFromPassword(
           crypto::SymmetricKey::AES, "password", "saltiest", 1000, 256));
   EXPECT_TRUE(NULL != key.get());

   crypto::Encryptor encryptor;
   // The IV must be exactly as long as the cipher block size.
   std::string iv("the iv: 16 bytes");
   EXPECT_EQ(16U, iv.size());
   EXPECT_TRUE(encryptor.Init(key.get(), crypto::Encryptor::CBC, iv));

   std::string plaintext("this is the plaintext");
   std::string ciphertext;
   EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));

   EXPECT_LT(0U, ciphertext.size());

   std::string decypted;
   EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted));

   EXPECT_EQ(plaintext, decypted);
 }

 // CTR mode encryption is only implemented using NSS.
 #if defined(USE_NSS)

 TEST(EncryptorTest, EncryptDecryptCTR) {
   scoped_ptr<crypto::SymmetricKey> key(
       crypto::SymmetricKey::GenerateRandomKey(
           crypto::SymmetricKey::AES, 128));

   EXPECT_TRUE(NULL != key.get());
   const std::string kInitialCounter = "0000000000000000";

   crypto::Encryptor encryptor;
   EXPECT_TRUE(encryptor.Init(key.get(), crypto::Encryptor::CTR, ""));
   EXPECT_TRUE(encryptor.SetCounter(kInitialCounter));

   std::string plaintext("normal plaintext of random length");
   std::string ciphertext;
   EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));
   EXPECT_LT(0U, ciphertext.size());

   std::string decypted;
   EXPECT_TRUE(encryptor.SetCounter(kInitialCounter));
   EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted));
   EXPECT_EQ(plaintext, decypted);

   plaintext = "0123456789012345";
   EXPECT_TRUE(encryptor.SetCounter(kInitialCounter));
   EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));
   EXPECT_LT(0U, ciphertext.size());

   EXPECT_TRUE(encryptor.SetCounter(kInitialCounter));
   EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted));
   EXPECT_EQ(plaintext, decypted);
 }

 TEST(EncryptorTest, CTRCounter) {
   const int kCounterSize = 16;
   const char kTest1[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
   uint8 buf[16];

   // Increment 10 times.
   crypto::Encryptor::Counter counter1(std::string(kTest1, kCounterSize));
   for (int i = 0; i < 10; ++i)
     counter1.Increment();
   counter1.Write(buf);
   EXPECT_EQ(0, memcmp(buf, kTest1, 15));
   EXPECT_TRUE(buf[15] == 10);

   // Check corner cases.
   const char kTest2[] = {0, 0, 0, 0, 0, 0, 0, 0,
                          0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
   const char kExpect2[] = {0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0};
   crypto::Encryptor::Counter counter2(std::string(kTest2, kCounterSize));
   counter2.Increment();
   counter2.Write(buf);
   EXPECT_EQ(0, memcmp(buf, kExpect2, kCounterSize));

   const char kTest3[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
                          0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
   const char kExpect3[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
   crypto::Encryptor::Counter counter3(std::string(kTest3, kCounterSize));
   counter3.Increment();
   counter3.Write(buf);
   EXPECT_EQ(0, memcmp(buf, kExpect3, kCounterSize));
 }

 #endif

 // TODO(wtc): add more known-answer tests.  Test vectors are available from
 // http://www.ietf.org/rfc/rfc3602
 // http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf
 // http://gladman.plushost.co.uk/oldsite/AES/index.php
 // http://csrc.nist.gov/groups/STM/cavp/documents/aes/KAT_AES.zip

 // NIST SP 800-38A test vector F.2.5 CBC-AES256.Encrypt.
 TEST(EncryptorTest, EncryptAES256CBC) {
   // From NIST SP 800-38a test cast F.2.5 CBC-AES256.Encrypt.
   static const unsigned char raw_key[] = {
     0x60, 0x3d, 0xeb, 0x10, 0x15, 0xca, 0x71, 0xbe,
     0x2b, 0x73, 0xae, 0xf0, 0x85, 0x7d, 0x77, 0x81,
     0x1f, 0x35, 0x2c, 0x07, 0x3b, 0x61, 0x08, 0xd7,
     0x2d, 0x98, 0x10, 0xa3, 0x09, 0x14, 0xdf, 0xf4
   };
   static const unsigned char raw_iv[] = {
     0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
     0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f
   };
   static const unsigned char raw_plaintext[] = {
     // Block #1
     0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96,
     0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
     // Block #2
     0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c,
     0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
     // Block #3
     0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11,
     0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
     // Block #4
     0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17,
     0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10,
   };
   static const unsigned char raw_ciphertext[] = {
     // Block #1
     0xf5, 0x8c, 0x4c, 0x04, 0xd6, 0xe5, 0xf1, 0xba,
     0x77, 0x9e, 0xab, 0xfb, 0x5f, 0x7b, 0xfb, 0xd6,
     // Block #2
     0x9c, 0xfc, 0x4e, 0x96, 0x7e, 0xdb, 0x80, 0x8d,
     0x67, 0x9f, 0x77, 0x7b, 0xc6, 0x70, 0x2c, 0x7d,
     // Block #3
     0x39, 0xf2, 0x33, 0x69, 0xa9, 0xd9, 0xba, 0xcf,
     0xa5, 0x30, 0xe2, 0x63, 0x04, 0x23, 0x14, 0x61,
     // Block #4
     0xb2, 0xeb, 0x05, 0xe2, 0xc3, 0x9b, 0xe9, 0xfc,
     0xda, 0x6c, 0x19, 0x07, 0x8c, 0x6a, 0x9d, 0x1b,
     // PKCS #5 padding, encrypted.
     0x3f, 0x46, 0x17, 0x96, 0xd6, 0xb0, 0xd6, 0xb2,
     0xe0, 0xc2, 0xa7, 0x2b, 0x4d, 0x80, 0xe6, 0x44
   };

   std::string key(reinterpret_cast<const char*>(raw_key), sizeof(raw_key));
   scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
       crypto::SymmetricKey::AES, key));
   ASSERT_TRUE(NULL != sym_key.get());

   crypto::Encryptor encryptor;
   // The IV must be exactly as long a the cipher block size.
   std::string iv(reinterpret_cast<const char*>(raw_iv), sizeof(raw_iv));
   EXPECT_EQ(16U, iv.size());
   EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));

   std::string plaintext(reinterpret_cast<const char*>(raw_plaintext),
                         sizeof(raw_plaintext));
   std::string ciphertext;
   EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));

   EXPECT_EQ(sizeof(raw_ciphertext), ciphertext.size());
   EXPECT_EQ(0, memcmp(ciphertext.data(), raw_ciphertext, ciphertext.size()));

   std::string decypted;
   EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted));

   EXPECT_EQ(plaintext, decypted);
 }

 // Expected output derived from the NSS implementation.
 TEST(EncryptorTest, EncryptAES128CBCRegression) {
   std::string key = "128=SixteenBytes";
   std::string iv = "Sweet Sixteen IV";
   std::string plaintext = "Plain text with a g-clef U+1D11E \360\235\204\236";
   std::string expected_ciphertext_hex =
       "D4A67A0BA33C30F207344D81D1E944BBE65587C3D7D9939A"
       "C070C62B9C15A3EA312EA4AD1BC7929F4D3C16B03AD5ADA8";

   scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
       crypto::SymmetricKey::AES, key));
   ASSERT_TRUE(NULL != sym_key.get());

   crypto::Encryptor encryptor;
   // The IV must be exactly as long a the cipher block size.
   EXPECT_EQ(16U, iv.size());
   EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));

   std::string ciphertext;
   EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));
   EXPECT_EQ(expected_ciphertext_hex, base::HexEncode(ciphertext.data(),
                                                      ciphertext.size()));

   std::string decypted;
   EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted));
   EXPECT_EQ(plaintext, decypted);
 }

 // Expected output derived from the NSS implementation.
 TEST(EncryptorTest, EncryptAES192CBCRegression) {
   std::string key = "192bitsIsTwentyFourByte!";
   std::string iv = "Sweet Sixteen IV";
   std::string plaintext = "Small text";
   std::string expected_ciphertext_hex = "78DE5D7C2714FC5C61346C5416F6C89A";

   scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
       crypto::SymmetricKey::AES, key));
   ASSERT_TRUE(NULL != sym_key.get());

   crypto::Encryptor encryptor;
   // The IV must be exactly as long a the cipher block size.
   EXPECT_EQ(16U, iv.size());
   EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));

   std::string ciphertext;
   EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));
   EXPECT_EQ(expected_ciphertext_hex, base::HexEncode(ciphertext.data(),
                                                      ciphertext.size()));

   std::string decypted;
   EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted));
   EXPECT_EQ(plaintext, decypted);
 }

 // Not all platforms allow import/generation of symmetric keys with an
 // unsupported size.
 #if !defined(OS_WIN) && !defined(USE_NSS)
 TEST(EncryptorTest, UnsupportedKeySize) {
   std::string key = "7 = bad";
   std::string iv = "Sweet Sixteen IV";
   scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
       crypto::SymmetricKey::AES, key));
   ASSERT_TRUE(NULL != sym_key.get());

   crypto::Encryptor encryptor;
   // The IV must be exactly as long a the cipher block size.
   EXPECT_EQ(16U, iv.size());
   EXPECT_FALSE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));
 }
 #endif  // unsupported platforms.

 TEST(EncryptorTest, UnsupportedIV) {
   std::string key = "128=SixteenBytes";
   std::string iv = "OnlyForteen :(";
   scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
       crypto::SymmetricKey::AES, key));
   ASSERT_TRUE(NULL != sym_key.get());

   crypto::Encryptor encryptor;
   EXPECT_FALSE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));
 }

 TEST(EncryptorTest, EmptyEncrypt) {
   std::string key = "128=SixteenBytes";
   std::string iv = "Sweet Sixteen IV";
   std::string plaintext;
   std::string expected_ciphertext_hex = "8518B8878D34E7185E300D0FCC426396";

   scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
       crypto::SymmetricKey::AES, key));
   ASSERT_TRUE(NULL != sym_key.get());

   crypto::Encryptor encryptor;
   // The IV must be exactly as long a the cipher block size.
   EXPECT_EQ(16U, iv.size());
   EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));

   std::string ciphertext;
   EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));
   EXPECT_EQ(expected_ciphertext_hex, base::HexEncode(ciphertext.data(),
                                                      ciphertext.size()));
 }

 TEST(EncryptorTest, EmptyDecrypt) {
   std::string key = "128=SixteenBytes";
   std::string iv = "Sweet Sixteen IV";

   scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
       crypto::SymmetricKey::AES, key));
   ASSERT_TRUE(NULL != sym_key.get());

   crypto::Encryptor encryptor;
   // The IV must be exactly as long a the cipher block size.
   EXPECT_EQ(16U, iv.size());
   EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));

   std::string decrypted;
   EXPECT_FALSE(encryptor.Decrypt("", &decrypted));
   EXPECT_EQ("", decrypted);
 }
	// Copyright (c) 2011 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "crypto/encryptor.h"

	#include <string>

	#include "base/memory/scoped_ptr.h"
	#include "base/string_number_conversions.h"
	#include "crypto/symmetric_key.h"
	#include "testing/gtest/include/gtest/gtest.h"

	TEST(EncryptorTest, EncryptDecrypt) {
	scoped_ptr<crypto::SymmetricKey> key(
	crypto::SymmetricKey::DeriveKeyFromPassword(
	crypto::SymmetricKey::AES, "password", "saltiest", 1000, 256));
	EXPECT_TRUE(NULL != key.get());

	crypto::Encryptor encryptor;
	// The IV must be exactly as long as the cipher block size.
	std::string iv("the iv: 16 bytes");
	EXPECT_EQ(16U, iv.size());
	EXPECT_TRUE(encryptor.Init(key.get(), crypto::Encryptor::CBC, iv));

	std::string plaintext("this is the plaintext");
	std::string ciphertext;
	EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));

	EXPECT_LT(0U, ciphertext.size());

	std::string decypted;
	EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted));

	EXPECT_EQ(plaintext, decypted);
	}

	// CTR mode encryption is only implemented using NSS.
	#if defined(USE_NSS)

	TEST(EncryptorTest, EncryptDecryptCTR) {
	scoped_ptr<crypto::SymmetricKey> key(
	crypto::SymmetricKey::GenerateRandomKey(
	crypto::SymmetricKey::AES, 128));

	EXPECT_TRUE(NULL != key.get());
	const std::string kInitialCounter = "0000000000000000";

	crypto::Encryptor encryptor;
	EXPECT_TRUE(encryptor.Init(key.get(), crypto::Encryptor::CTR, ""));
	EXPECT_TRUE(encryptor.SetCounter(kInitialCounter));

	std::string plaintext("normal plaintext of random length");
	std::string ciphertext;
	EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));
	EXPECT_LT(0U, ciphertext.size());

	std::string decypted;
	EXPECT_TRUE(encryptor.SetCounter(kInitialCounter));
	EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted));
	EXPECT_EQ(plaintext, decypted);

	plaintext = "0123456789012345";
	EXPECT_TRUE(encryptor.SetCounter(kInitialCounter));
	EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));
	EXPECT_LT(0U, ciphertext.size());

	EXPECT_TRUE(encryptor.SetCounter(kInitialCounter));
	EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted));
	EXPECT_EQ(plaintext, decypted);
	}

	TEST(EncryptorTest, CTRCounter) {
	const int kCounterSize = 16;
	const char kTest1[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
	uint8 buf[16];

	// Increment 10 times.
	crypto::Encryptor::Counter counter1(std::string(kTest1, kCounterSize));
	for (int i = 0; i < 10; ++i)
	counter1.Increment();
	counter1.Write(buf);
	EXPECT_EQ(0, memcmp(buf, kTest1, 15));
	EXPECT_TRUE(buf[15] == 10);

	// Check corner cases.
	const char kTest2[] = {0, 0, 0, 0, 0, 0, 0, 0,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
	const char kExpect2[] = {0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0};
	crypto::Encryptor::Counter counter2(std::string(kTest2, kCounterSize));
	counter2.Increment();
	counter2.Write(buf);
	EXPECT_EQ(0, memcmp(buf, kExpect2, kCounterSize));

	const char kTest3[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
	const char kExpect3[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
	crypto::Encryptor::Counter counter3(std::string(kTest3, kCounterSize));
	counter3.Increment();
	counter3.Write(buf);
	EXPECT_EQ(0, memcmp(buf, kExpect3, kCounterSize));
	}

	#endif

	// TODO(wtc): add more known-answer tests. Test vectors are available from
	// http://www.ietf.org/rfc/rfc3602
	// http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf
	// http://gladman.plushost.co.uk/oldsite/AES/index.php
	// http://csrc.nist.gov/groups/STM/cavp/documents/aes/KAT_AES.zip

	// NIST SP 800-38A test vector F.2.5 CBC-AES256.Encrypt.
	TEST(EncryptorTest, EncryptAES256CBC) {
	// From NIST SP 800-38a test cast F.2.5 CBC-AES256.Encrypt.
	static const unsigned char raw_key[] = {
	0x60, 0x3d, 0xeb, 0x10, 0x15, 0xca, 0x71, 0xbe,
	0x2b, 0x73, 0xae, 0xf0, 0x85, 0x7d, 0x77, 0x81,
	0x1f, 0x35, 0x2c, 0x07, 0x3b, 0x61, 0x08, 0xd7,
	0x2d, 0x98, 0x10, 0xa3, 0x09, 0x14, 0xdf, 0xf4
	};
	static const unsigned char raw_iv[] = {
	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f
	};
	static const unsigned char raw_plaintext[] = {
	// Block #1
	0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96,
	0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
	// Block #2
	0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c,
	0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
	// Block #3
	0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11,
	0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
	// Block #4
	0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17,
	0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10,
	};
	static const unsigned char raw_ciphertext[] = {
	// Block #1
	0xf5, 0x8c, 0x4c, 0x04, 0xd6, 0xe5, 0xf1, 0xba,
	0x77, 0x9e, 0xab, 0xfb, 0x5f, 0x7b, 0xfb, 0xd6,
	// Block #2
	0x9c, 0xfc, 0x4e, 0x96, 0x7e, 0xdb, 0x80, 0x8d,
	0x67, 0x9f, 0x77, 0x7b, 0xc6, 0x70, 0x2c, 0x7d,
	// Block #3
	0x39, 0xf2, 0x33, 0x69, 0xa9, 0xd9, 0xba, 0xcf,
	0xa5, 0x30, 0xe2, 0x63, 0x04, 0x23, 0x14, 0x61,
	// Block #4
	0xb2, 0xeb, 0x05, 0xe2, 0xc3, 0x9b, 0xe9, 0xfc,
	0xda, 0x6c, 0x19, 0x07, 0x8c, 0x6a, 0x9d, 0x1b,
	// PKCS #5 padding, encrypted.
	0x3f, 0x46, 0x17, 0x96, 0xd6, 0xb0, 0xd6, 0xb2,
	0xe0, 0xc2, 0xa7, 0x2b, 0x4d, 0x80, 0xe6, 0x44
	};

	std::string key(reinterpret_cast<const char*>(raw_key), sizeof(raw_key));
	scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
	crypto::SymmetricKey::AES, key));
	ASSERT_TRUE(NULL != sym_key.get());

	crypto::Encryptor encryptor;
	// The IV must be exactly as long a the cipher block size.
	std::string iv(reinterpret_cast<const char*>(raw_iv), sizeof(raw_iv));
	EXPECT_EQ(16U, iv.size());
	EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));

	std::string plaintext(reinterpret_cast<const char*>(raw_plaintext),
	sizeof(raw_plaintext));
	std::string ciphertext;
	EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));

	EXPECT_EQ(sizeof(raw_ciphertext), ciphertext.size());
	EXPECT_EQ(0, memcmp(ciphertext.data(), raw_ciphertext, ciphertext.size()));

	std::string decypted;
	EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted));

	EXPECT_EQ(plaintext, decypted);
	}

	// Expected output derived from the NSS implementation.
	TEST(EncryptorTest, EncryptAES128CBCRegression) {
	std::string key = "128=SixteenBytes";
	std::string iv = "Sweet Sixteen IV";
	std::string plaintext = "Plain text with a g-clef U+1D11E \360\235\204\236";
	std::string expected_ciphertext_hex =
	"D4A67A0BA33C30F207344D81D1E944BBE65587C3D7D9939A"
	"C070C62B9C15A3EA312EA4AD1BC7929F4D3C16B03AD5ADA8";

	scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
	crypto::SymmetricKey::AES, key));
	ASSERT_TRUE(NULL != sym_key.get());

	crypto::Encryptor encryptor;
	// The IV must be exactly as long a the cipher block size.
	EXPECT_EQ(16U, iv.size());
	EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));

	std::string ciphertext;
	EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));
	EXPECT_EQ(expected_ciphertext_hex, base::HexEncode(ciphertext.data(),
	ciphertext.size()));

	std::string decypted;
	EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted));
	EXPECT_EQ(plaintext, decypted);
	}

	// Expected output derived from the NSS implementation.
	TEST(EncryptorTest, EncryptAES192CBCRegression) {
	std::string key = "192bitsIsTwentyFourByte!";
	std::string iv = "Sweet Sixteen IV";
	std::string plaintext = "Small text";
	std::string expected_ciphertext_hex = "78DE5D7C2714FC5C61346C5416F6C89A";

	scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
	crypto::SymmetricKey::AES, key));
	ASSERT_TRUE(NULL != sym_key.get());

	crypto::Encryptor encryptor;
	// The IV must be exactly as long a the cipher block size.
	EXPECT_EQ(16U, iv.size());
	EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));

	std::string ciphertext;
	EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));
	EXPECT_EQ(expected_ciphertext_hex, base::HexEncode(ciphertext.data(),
	ciphertext.size()));

	std::string decypted;
	EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decypted));
	EXPECT_EQ(plaintext, decypted);
	}

	// Not all platforms allow import/generation of symmetric keys with an
	// unsupported size.
	#if !defined(OS_WIN) && !defined(USE_NSS)
	TEST(EncryptorTest, UnsupportedKeySize) {
	std::string key = "7 = bad";
	std::string iv = "Sweet Sixteen IV";
	scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
	crypto::SymmetricKey::AES, key));
	ASSERT_TRUE(NULL != sym_key.get());

	crypto::Encryptor encryptor;
	// The IV must be exactly as long a the cipher block size.
	EXPECT_EQ(16U, iv.size());
	EXPECT_FALSE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));
	}
	#endif // unsupported platforms.

	TEST(EncryptorTest, UnsupportedIV) {
	std::string key = "128=SixteenBytes";
	std::string iv = "OnlyForteen :(";
	scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
	crypto::SymmetricKey::AES, key));
	ASSERT_TRUE(NULL != sym_key.get());

	crypto::Encryptor encryptor;
	EXPECT_FALSE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));
	}

	TEST(EncryptorTest, EmptyEncrypt) {
	std::string key = "128=SixteenBytes";
	std::string iv = "Sweet Sixteen IV";
	std::string plaintext;
	std::string expected_ciphertext_hex = "8518B8878D34E7185E300D0FCC426396";

	scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
	crypto::SymmetricKey::AES, key));
	ASSERT_TRUE(NULL != sym_key.get());

	crypto::Encryptor encryptor;
	// The IV must be exactly as long a the cipher block size.
	EXPECT_EQ(16U, iv.size());
	EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));

	std::string ciphertext;
	EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));
	EXPECT_EQ(expected_ciphertext_hex, base::HexEncode(ciphertext.data(),
	ciphertext.size()));
	}

	TEST(EncryptorTest, EmptyDecrypt) {
	std::string key = "128=SixteenBytes";
	std::string iv = "Sweet Sixteen IV";

	scoped_ptr<crypto::SymmetricKey> sym_key(crypto::SymmetricKey::Import(
	crypto::SymmetricKey::AES, key));
	ASSERT_TRUE(NULL != sym_key.get());

	crypto::Encryptor encryptor;
	// The IV must be exactly as long a the cipher block size.
	EXPECT_EQ(16U, iv.size());
	EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));

	std::string decrypted;
	EXPECT_FALSE(encryptor.Decrypt("", &decrypted));
	EXPECT_EQ("", decrypted);
	}