1 files changed, 233 insertions, 0 deletions
diff --git a/crypto/encryptor_unittest.cc b/crypto/encryptor_unittest.cc
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+++ b/crypto/encryptor_unittest.cc
@@ -0,0 +1,233 @@
+// 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);
+}
+
+// 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);
+}