123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573 |
- // Copyright (c) 2012 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 <stddef.h>
- #include <memory>
- #include <string>
- #include "base/containers/span.h"
- #include "base/strings/string_number_conversions.h"
- #include "crypto/symmetric_key.h"
- #include "testing/gtest/include/gtest/gtest.h"
- TEST(EncryptorTest, EncryptDecrypt) {
- std::unique_ptr<crypto::SymmetricKey> key(
- crypto::SymmetricKey::DeriveKeyFromPasswordUsingPbkdf2(
- crypto::SymmetricKey::AES, "password", "saltiest", 1000, 256));
- EXPECT_TRUE(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 decrypted;
- EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decrypted));
- EXPECT_EQ(plaintext, decrypted);
- // Repeat the test with the bytes API.
- std::vector<uint8_t> plaintext_vec(plaintext.begin(), plaintext.end());
- std::vector<uint8_t> ciphertext_vec;
- EXPECT_TRUE(encryptor.Encrypt(plaintext_vec, &ciphertext_vec));
- EXPECT_LT(0U, ciphertext_vec.size());
- std::vector<uint8_t> decrypted_vec;
- EXPECT_TRUE(encryptor.Decrypt(ciphertext_vec, &decrypted_vec));
- EXPECT_EQ(plaintext_vec, decrypted_vec);
- }
- TEST(EncryptorTest, DecryptWrongKey) {
- std::unique_ptr<crypto::SymmetricKey> key(
- crypto::SymmetricKey::DeriveKeyFromPasswordUsingPbkdf2(
- crypto::SymmetricKey::AES, "password", "saltiest", 1000, 256));
- EXPECT_TRUE(key.get());
- // A wrong key that can be detected by implementations that validate every
- // byte in the padding.
- std::unique_ptr<crypto::SymmetricKey> wrong_key(
- crypto::SymmetricKey::DeriveKeyFromPasswordUsingPbkdf2(
- crypto::SymmetricKey::AES, "wrongword", "sweetest", 1000, 256));
- EXPECT_TRUE(wrong_key.get());
- // A wrong key that can't be detected by any implementation. The password
- // "wrongword;" would also work.
- std::unique_ptr<crypto::SymmetricKey> wrong_key2(
- crypto::SymmetricKey::DeriveKeyFromPasswordUsingPbkdf2(
- crypto::SymmetricKey::AES, "wrongword+", "sweetest", 1000, 256));
- EXPECT_TRUE(wrong_key2.get());
- // A wrong key that can be detected by all implementations.
- std::unique_ptr<crypto::SymmetricKey> wrong_key3(
- crypto::SymmetricKey::DeriveKeyFromPasswordUsingPbkdf2(
- crypto::SymmetricKey::AES, "wrongwordx", "sweetest", 1000, 256));
- EXPECT_TRUE(wrong_key3.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));
- static const unsigned char expected_ciphertext[] = {
- 0x7D, 0x67, 0x5B, 0x53, 0xE6, 0xD8, 0x0F, 0x27,
- 0x74, 0xB1, 0x90, 0xFE, 0x6E, 0x58, 0x4A, 0xA0,
- 0x0E, 0x35, 0xE3, 0x01, 0xC0, 0xFE, 0x9A, 0xD8,
- 0x48, 0x1D, 0x42, 0xB0, 0xBA, 0x21, 0xB2, 0x0C
- };
- ASSERT_EQ(std::size(expected_ciphertext), ciphertext.size());
- for (size_t i = 0; i < ciphertext.size(); ++i) {
- ASSERT_EQ(expected_ciphertext[i],
- static_cast<unsigned char>(ciphertext[i]));
- }
- std::string decrypted;
- // This wrong key causes the last padding byte to be 5, which is a valid
- // padding length, and the second to last padding byte to be 137, which is
- // invalid. If an implementation simply uses the last padding byte to
- // determine the padding length without checking every padding byte,
- // Encryptor::Decrypt() will still return true. This is the case for NSS
- // (crbug.com/124434).
- crypto::Encryptor decryptor;
- EXPECT_TRUE(decryptor.Init(wrong_key.get(), crypto::Encryptor::CBC, iv));
- EXPECT_FALSE(decryptor.Decrypt(ciphertext, &decrypted));
- // This demonstrates that not all wrong keys can be detected by padding
- // error. This wrong key causes the last padding byte to be 1, which is
- // a valid padding block of length 1.
- crypto::Encryptor decryptor2;
- EXPECT_TRUE(decryptor2.Init(wrong_key2.get(), crypto::Encryptor::CBC, iv));
- EXPECT_TRUE(decryptor2.Decrypt(ciphertext, &decrypted));
- // This wrong key causes the last padding byte to be 253, which should be
- // rejected by all implementations.
- crypto::Encryptor decryptor3;
- EXPECT_TRUE(decryptor3.Init(wrong_key3.get(), crypto::Encryptor::CBC, iv));
- EXPECT_FALSE(decryptor3.Decrypt(ciphertext, &decrypted));
- }
- namespace {
- // From NIST SP 800-38a test cast:
- // - F.5.1 CTR-AES128.Encrypt
- // - F.5.6 CTR-AES256.Encrypt
- // http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf
- const unsigned char kAES128CTRKey[] = {
- 0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6,
- 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c
- };
- const unsigned char kAES256CTRKey[] = {
- 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
- };
- const unsigned char kAESCTRInitCounter[] = {
- 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
- 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
- };
- const unsigned char kAESCTRPlaintext[] = {
- // 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
- };
- const unsigned char kAES128CTRCiphertext[] = {
- // Block #1
- 0x87, 0x4d, 0x61, 0x91, 0xb6, 0x20, 0xe3, 0x26,
- 0x1b, 0xef, 0x68, 0x64, 0x99, 0x0d, 0xb6, 0xce,
- // Block #2
- 0x98, 0x06, 0xf6, 0x6b, 0x79, 0x70, 0xfd, 0xff,
- 0x86, 0x17, 0x18, 0x7b, 0xb9, 0xff, 0xfd, 0xff,
- // Block #3
- 0x5a, 0xe4, 0xdf, 0x3e, 0xdb, 0xd5, 0xd3, 0x5e,
- 0x5b, 0x4f, 0x09, 0x02, 0x0d, 0xb0, 0x3e, 0xab,
- // Block #4
- 0x1e, 0x03, 0x1d, 0xda, 0x2f, 0xbe, 0x03, 0xd1,
- 0x79, 0x21, 0x70, 0xa0, 0xf3, 0x00, 0x9c, 0xee
- };
- const unsigned char kAES256CTRCiphertext[] = {
- // Block #1
- 0x60, 0x1e, 0xc3, 0x13, 0x77, 0x57, 0x89, 0xa5,
- 0xb7, 0xa7, 0xf5, 0x04, 0xbb, 0xf3, 0xd2, 0x28,
- // Block #2
- 0xf4, 0x43, 0xe3, 0xca, 0x4d, 0x62, 0xb5, 0x9a,
- 0xca, 0x84, 0xe9, 0x90, 0xca, 0xca, 0xf5, 0xc5,
- // Block #3
- 0x2b, 0x09, 0x30, 0xda, 0xa2, 0x3d, 0xe9, 0x4c,
- 0xe8, 0x70, 0x17, 0xba, 0x2d, 0x84, 0x98, 0x8d,
- // Block #4
- 0xdf, 0xc9, 0xc5, 0x8d, 0xb6, 0x7a, 0xad, 0xa6,
- 0x13, 0xc2, 0xdd, 0x08, 0x45, 0x79, 0x41, 0xa6
- };
- void TestAESCTREncrypt(
- const unsigned char* key, size_t key_size,
- const unsigned char* init_counter, size_t init_counter_size,
- const unsigned char* plaintext, size_t plaintext_size,
- const unsigned char* ciphertext, size_t ciphertext_size) {
- std::string key_str(reinterpret_cast<const char*>(key), key_size);
- std::unique_ptr<crypto::SymmetricKey> sym_key(
- crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, key_str));
- ASSERT_TRUE(sym_key.get());
- crypto::Encryptor encryptor;
- EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CTR, ""));
- base::StringPiece init_counter_str(
- reinterpret_cast<const char*>(init_counter), init_counter_size);
- base::StringPiece plaintext_str(
- reinterpret_cast<const char*>(plaintext), plaintext_size);
- EXPECT_TRUE(encryptor.SetCounter(init_counter_str));
- std::string encrypted;
- EXPECT_TRUE(encryptor.Encrypt(plaintext_str, &encrypted));
- EXPECT_EQ(ciphertext_size, encrypted.size());
- EXPECT_EQ(0, memcmp(encrypted.data(), ciphertext, encrypted.size()));
- std::string decrypted;
- EXPECT_TRUE(encryptor.SetCounter(init_counter_str));
- EXPECT_TRUE(encryptor.Decrypt(encrypted, &decrypted));
- EXPECT_EQ(plaintext_str, decrypted);
- // Repeat the test with the bytes API.
- EXPECT_TRUE(
- encryptor.SetCounter(base::make_span(init_counter, init_counter_size)));
- std::vector<uint8_t> encrypted_vec;
- EXPECT_TRUE(encryptor.Encrypt(base::make_span(plaintext, plaintext_size),
- &encrypted_vec));
- EXPECT_EQ(ciphertext_size, encrypted_vec.size());
- EXPECT_EQ(0, memcmp(encrypted_vec.data(), ciphertext, encrypted_vec.size()));
- std::vector<uint8_t> decrypted_vec;
- EXPECT_TRUE(
- encryptor.SetCounter(base::make_span(init_counter, init_counter_size)));
- EXPECT_TRUE(encryptor.Decrypt(encrypted_vec, &decrypted_vec));
- EXPECT_EQ(std::vector<uint8_t>(plaintext, plaintext + plaintext_size),
- decrypted_vec);
- }
- void TestAESCTRMultipleDecrypt(
- const unsigned char* key, size_t key_size,
- const unsigned char* init_counter, size_t init_counter_size,
- const unsigned char* plaintext, size_t plaintext_size,
- const unsigned char* ciphertext, size_t ciphertext_size) {
- std::string key_str(reinterpret_cast<const char*>(key), key_size);
- std::unique_ptr<crypto::SymmetricKey> sym_key(
- crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, key_str));
- ASSERT_TRUE(sym_key.get());
- crypto::Encryptor encryptor;
- EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CTR, ""));
- // Counter is set only once.
- EXPECT_TRUE(encryptor.SetCounter(base::StringPiece(
- reinterpret_cast<const char*>(init_counter), init_counter_size)));
- std::string ciphertext_str(reinterpret_cast<const char*>(ciphertext),
- ciphertext_size);
- int kTestDecryptSizes[] = { 32, 16, 8 };
- int offset = 0;
- for (size_t i = 0; i < std::size(kTestDecryptSizes); ++i) {
- std::string decrypted;
- size_t len = kTestDecryptSizes[i];
- EXPECT_TRUE(
- encryptor.Decrypt(ciphertext_str.substr(offset, len), &decrypted));
- EXPECT_EQ(len, decrypted.size());
- EXPECT_EQ(0, memcmp(decrypted.data(), plaintext + offset, len));
- offset += len;
- }
- }
- } // namespace
- TEST(EncryptorTest, EncryptAES128CTR) {
- TestAESCTREncrypt(kAES128CTRKey, std::size(kAES128CTRKey), kAESCTRInitCounter,
- std::size(kAESCTRInitCounter), kAESCTRPlaintext,
- std::size(kAESCTRPlaintext), kAES128CTRCiphertext,
- std::size(kAES128CTRCiphertext));
- }
- TEST(EncryptorTest, EncryptAES256CTR) {
- TestAESCTREncrypt(kAES256CTRKey, std::size(kAES256CTRKey), kAESCTRInitCounter,
- std::size(kAESCTRInitCounter), kAESCTRPlaintext,
- std::size(kAESCTRPlaintext), kAES256CTRCiphertext,
- std::size(kAES256CTRCiphertext));
- }
- TEST(EncryptorTest, EncryptAES128CTR_MultipleDecrypt) {
- TestAESCTRMultipleDecrypt(kAES128CTRKey, std::size(kAES128CTRKey),
- kAESCTRInitCounter, std::size(kAESCTRInitCounter),
- kAESCTRPlaintext, std::size(kAESCTRPlaintext),
- kAES128CTRCiphertext,
- std::size(kAES128CTRCiphertext));
- }
- TEST(EncryptorTest, EncryptAES256CTR_MultipleDecrypt) {
- TestAESCTRMultipleDecrypt(kAES256CTRKey, std::size(kAES256CTRKey),
- kAESCTRInitCounter, std::size(kAESCTRInitCounter),
- kAESCTRPlaintext, std::size(kAESCTRPlaintext),
- kAES256CTRCiphertext,
- std::size(kAES256CTRCiphertext));
- }
- TEST(EncryptorTest, EncryptDecryptCTR) {
- std::unique_ptr<crypto::SymmetricKey> key(
- crypto::SymmetricKey::GenerateRandomKey(crypto::SymmetricKey::AES, 128));
- EXPECT_TRUE(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 decrypted;
- EXPECT_TRUE(encryptor.SetCounter(kInitialCounter));
- EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decrypted));
- EXPECT_EQ(plaintext, decrypted);
- 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, &decrypted));
- EXPECT_EQ(plaintext, decrypted);
- }
- // 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 kRawKey[] = {
- 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 kRawIv[] = {
- 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
- 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f
- };
- static const unsigned char kRawPlaintext[] = {
- // 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 kRawCiphertext[] = {
- // 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*>(kRawKey), sizeof(kRawKey));
- std::unique_ptr<crypto::SymmetricKey> sym_key(
- crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, key));
- ASSERT_TRUE(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*>(kRawIv), sizeof(kRawIv));
- EXPECT_EQ(16U, iv.size());
- EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));
- std::string plaintext(reinterpret_cast<const char*>(kRawPlaintext),
- sizeof(kRawPlaintext));
- std::string ciphertext;
- EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));
- EXPECT_EQ(sizeof(kRawCiphertext), ciphertext.size());
- EXPECT_EQ(0, memcmp(ciphertext.data(), kRawCiphertext, ciphertext.size()));
- std::string decrypted;
- EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decrypted));
- EXPECT_EQ(plaintext, decrypted);
- }
- // 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";
- std::unique_ptr<crypto::SymmetricKey> sym_key(
- crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, key));
- ASSERT_TRUE(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 decrypted;
- EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decrypted));
- EXPECT_EQ(plaintext, decrypted);
- }
- // Symmetric keys with an unsupported size should be rejected. Whether they are
- // rejected by SymmetricKey::Import or Encryptor::Init depends on the platform.
- TEST(EncryptorTest, UnsupportedKeySize) {
- std::string key = "7 = bad";
- std::string iv = "Sweet Sixteen IV";
- std::unique_ptr<crypto::SymmetricKey> sym_key(
- crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, key));
- if (!sym_key.get())
- return;
- crypto::Encryptor encryptor;
- // The IV must be exactly as long as the cipher block size.
- EXPECT_EQ(16U, iv.size());
- EXPECT_FALSE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));
- }
- TEST(EncryptorTest, UnsupportedIV) {
- std::string key = "128=SixteenBytes";
- std::string iv = "OnlyForteen :(";
- std::unique_ptr<crypto::SymmetricKey> sym_key(
- crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, key));
- ASSERT_TRUE(sym_key.get());
- crypto::Encryptor encryptor;
- EXPECT_FALSE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));
- }
- TEST(EncryptorTest, EmptyEncryptCBC) {
- std::string key = "128=SixteenBytes";
- std::string iv = "Sweet Sixteen IV";
- std::string plaintext;
- std::string expected_ciphertext_hex = "8518B8878D34E7185E300D0FCC426396";
- std::unique_ptr<crypto::SymmetricKey> sym_key(
- crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, key));
- ASSERT_TRUE(sym_key.get());
- crypto::Encryptor encryptor;
- // The IV must be exactly as long as 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 decrypted;
- EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decrypted));
- EXPECT_EQ(decrypted, plaintext);
- // Decrypting the empty string should fail. Our formulation of CBC expects a
- // full block of padding for CBC.
- EXPECT_FALSE(encryptor.Decrypt(std::string(), &decrypted));
- // Repeat the test with the byte-based API.
- EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CBC, iv));
- std::vector<uint8_t> ciphertext_bytes;
- EXPECT_TRUE(
- encryptor.Encrypt(base::span<const uint8_t>(), &ciphertext_bytes));
- EXPECT_EQ(expected_ciphertext_hex, base::HexEncode(ciphertext_bytes));
- std::vector<uint8_t> decrypted_bytes;
- EXPECT_TRUE(encryptor.Decrypt(ciphertext_bytes, &decrypted_bytes));
- EXPECT_EQ(decrypted_bytes.size(), 0u);
- // Decrypting the empty string should fail. Our formulation of CBC expects a
- // full block of padding for CBC.
- EXPECT_FALSE(
- encryptor.Decrypt(base::span<const uint8_t>(), &decrypted_bytes));
- }
- TEST(EncryptorTest, EmptyEncryptCTR) {
- std::string key = "128=SixteenBytes";
- std::string iv = "Sweet Sixteen IV";
- std::string plaintext;
- std::string expected_ciphertext;
- std::unique_ptr<crypto::SymmetricKey> sym_key(
- crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, key));
- ASSERT_TRUE(sym_key.get());
- crypto::Encryptor encryptor;
- EXPECT_TRUE(encryptor.Init(sym_key.get(), crypto::Encryptor::CTR, ""));
- ASSERT_TRUE(encryptor.SetCounter(iv));
- std::string ciphertext;
- EXPECT_TRUE(encryptor.Encrypt(plaintext, &ciphertext));
- EXPECT_EQ(expected_ciphertext, ciphertext);
- std::string decrypted;
- EXPECT_TRUE(encryptor.Decrypt(ciphertext, &decrypted));
- EXPECT_EQ(decrypted, plaintext);
- // Repeat the test with the byte-based API.
- ASSERT_TRUE(encryptor.SetCounter(iv));
- std::vector<uint8_t> ciphertext_bytes;
- EXPECT_TRUE(
- encryptor.Encrypt(base::span<const uint8_t>(), &ciphertext_bytes));
- EXPECT_EQ(ciphertext_bytes.size(), 0u);
- std::vector<uint8_t> decrypted_bytes;
- EXPECT_TRUE(encryptor.Decrypt(base::span<const uint8_t>(), &decrypted_bytes));
- EXPECT_EQ(decrypted_bytes.size(), 0u);
- }
- TEST(EncryptorTest, CipherTextNotMultipleOfBlockSize) {
- std::string key = "128=SixteenBytes";
- std::string iv = "Sweet Sixteen IV";
- std::unique_ptr<crypto::SymmetricKey> sym_key(
- crypto::SymmetricKey::Import(crypto::SymmetricKey::AES, key));
- ASSERT_TRUE(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));
- // Use a separately allocated array to improve the odds of the memory tools
- // catching invalid accesses.
- //
- // Otherwise when using std::string as the other tests do, accesses several
- // bytes off the end of the buffer may fall inside the reservation of
- // the string and not be detected.
- std::unique_ptr<char[]> ciphertext(new char[1]);
- std::string plaintext;
- EXPECT_FALSE(
- encryptor.Decrypt(base::StringPiece(ciphertext.get(), 1), &plaintext));
- }
|