cfb_test.cc
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1 // Copyright (c) 2017, Google Inc.
2 //
3 // Permission to use, copy, modify, and/or distribute this software for any
4 // purpose with or without fee is hereby granted, provided that the above
5 // copyright notice and this permission notice appear in all copies.
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13 // CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
14 
15 #include <openssl/cipher.h>
16 
17 #include <gtest/gtest.h>
18 
19 #include "../../crypto/internal.h"
20 #include "../../crypto/test/test_util.h"
21 
22 struct CFBTestCase {
23  size_t key_len;
24  uint8_t key[32];
25  uint8_t iv[16];
26  uint8_t plaintext[16*4];
27  uint8_t ciphertext[16*4];
28 };
29 
30 static const CFBTestCase kCFBTestCases[] = {
31  {
32  // This is the test case from
33  // http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38a.pdf,
34  // section F.3.13, for CFB128-AES128
35  16,
36  {0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c},
37  {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f},
38  {0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
39  0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
40  0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
41  0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10},
42  {0x3b, 0x3f, 0xd9, 0x2e, 0xb7, 0x2d, 0xad, 0x20, 0x33, 0x34, 0x49, 0xf8, 0xe8, 0x3c, 0xfb, 0x4a,
43  0xc8, 0xa6, 0x45, 0x37, 0xa0, 0xb3, 0xa9, 0x3f, 0xcd, 0xe3, 0xcd, 0xad, 0x9f, 0x1c, 0xe5, 0x8b,
44  0x26, 0x75, 0x1f, 0x67, 0xa3, 0xcb, 0xb1, 0x40, 0xb1, 0x80, 0x8c, 0xf1, 0x87, 0xa4, 0xf4, 0xdf,
45  0xc0, 0x4b, 0x05, 0x35, 0x7c, 0x5d, 0x1c, 0x0e, 0xea, 0xc4, 0xc6, 0x6f, 0x9f, 0xf7, 0xf2, 0xe6},
46  },
47  {
48  // This is the test case from
49  // http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38a.pdf,
50  // section F.3.15, CFB128-AES192
51  24,
52  {0x8e, 0x73, 0xb0, 0xf7, 0xda, 0x0e, 0x64, 0x52, 0xc8, 0x10, 0xf3, 0x2b, 0x80, 0x90, 0x79, 0xe5,
53  0x62, 0xf8, 0xea, 0xd2, 0x52, 0x2c, 0x6b, 0x7b},
54  {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f},
55  {0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
56  0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
57  0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
58  0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10},
59  {0xcd, 0xc8, 0x0d, 0x6f, 0xdd, 0xf1, 0x8c, 0xab, 0x34, 0xc2, 0x59, 0x09, 0xc9, 0x9a, 0x41, 0x74,
60  0x67, 0xce, 0x7f, 0x7f, 0x81, 0x17, 0x36, 0x21, 0x96, 0x1a, 0x2b, 0x70, 0x17, 0x1d, 0x3d, 0x7a,
61  0x2e, 0x1e, 0x8a, 0x1d, 0xd5, 0x9b, 0x88, 0xb1, 0xc8, 0xe6, 0x0f, 0xed, 0x1e, 0xfa, 0xc4, 0xc9,
62  0xc0, 0x5f, 0x9f, 0x9c, 0xa9, 0x83, 0x4f, 0xa0, 0x42, 0xae, 0x8f, 0xba, 0x58, 0x4b, 0x09, 0xff},
63  },
64  {
65  // This is the test case from
66  // http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38a.pdf,
67  // section F.3.17, CFB128-AES256
68  32,
69  {0x60, 0x3d, 0xeb, 0x10, 0x15, 0xca, 0x71, 0xbe, 0x2b, 0x73, 0xae, 0xf0, 0x85, 0x7d, 0x77, 0x81,
70  0x1f, 0x35, 0x2c, 0x07, 0x3b, 0x61, 0x08, 0xd7, 0x2d, 0x98, 0x10, 0xa3, 0x09, 0x14, 0xdf, 0xf4},
71  {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f},
72  {0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
73  0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
74  0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
75  0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10},
76  {0xdc, 0x7e, 0x84, 0xbf, 0xda, 0x79, 0x16, 0x4b, 0x7e, 0xcd, 0x84, 0x86, 0x98, 0x5d, 0x38, 0x60,
77  0x39, 0xff, 0xed, 0x14, 0x3b, 0x28, 0xb1, 0xc8, 0x32, 0x11, 0x3c, 0x63, 0x31, 0xe5, 0x40, 0x7b,
78  0xdf, 0x10, 0x13, 0x24, 0x15, 0xe5, 0x4b, 0x92, 0xa1, 0x3e, 0xd0, 0xa8, 0x26, 0x7a, 0xe2, 0xf9,
79  0x75, 0xa3, 0x85, 0x74, 0x1a, 0xb9, 0xce, 0xf8, 0x20, 0x31, 0x62, 0x3d, 0x55, 0xb1, 0xe4, 0x71},
80  },
81 };
82 
83 TEST(CFBTest, TestVectors) {
84  unsigned test_num = 0;
85  for (const auto &test : kCFBTestCases) {
86  test_num++;
87  SCOPED_TRACE(test_num);
88 
89  const size_t input_len = sizeof(test.plaintext);
90  std::unique_ptr<uint8_t[]> out(new uint8_t[input_len]);
91 
92  for (size_t stride = 1; stride <= input_len; stride++) {
93  bssl::ScopedEVP_CIPHER_CTX ctx;
94  if (test.key_len == 16) {
95  ASSERT_TRUE(EVP_EncryptInit_ex(ctx.get(), EVP_aes_128_cfb128(), nullptr,
96  test.key, test.iv));
97  } else if (test.key_len == 24) {
98  ASSERT_TRUE(EVP_EncryptInit_ex(ctx.get(), EVP_aes_192_cfb128(), nullptr,
99  test.key, test.iv));
100  } else {
101  assert(test.key_len == 32);
102  ASSERT_TRUE(EVP_EncryptInit_ex(ctx.get(), EVP_aes_256_cfb128(), nullptr,
103  test.key, test.iv));
104  }
105 
106  size_t done = 0;
107  while (done < input_len) {
108  size_t todo = stride;
109  if (todo > input_len - done) {
110  todo = input_len - done;
111  }
112 
113  int out_bytes;
114  ASSERT_TRUE(EVP_EncryptUpdate(ctx.get(), out.get() + done, &out_bytes,
115  test.plaintext + done, todo));
116  ASSERT_EQ(static_cast<size_t>(out_bytes), todo);
117 
118  done += todo;
119  }
120 
121  EXPECT_EQ(Bytes(test.ciphertext), Bytes(out.get(), input_len));
122  }
123 
124  bssl::ScopedEVP_CIPHER_CTX decrypt_ctx;
125  if (test.key_len == 16) {
126  ASSERT_TRUE(EVP_DecryptInit_ex(decrypt_ctx.get(), EVP_aes_128_cfb128(),
127  nullptr, test.key, test.iv));
128  } else if (test.key_len == 24) {
129  ASSERT_TRUE(EVP_DecryptInit_ex(decrypt_ctx.get(), EVP_aes_192_cfb128(),
130  nullptr, test.key, test.iv));
131  } else {
132  assert(test.key_len == 32);
133  ASSERT_TRUE(EVP_DecryptInit_ex(decrypt_ctx.get(), EVP_aes_256_cfb128(),
134  nullptr, test.key, test.iv));
135  }
136 
137  std::unique_ptr<uint8_t[]> plaintext(new uint8_t[input_len]);
138  int num_bytes;
139  ASSERT_TRUE(EVP_DecryptUpdate(decrypt_ctx.get(), plaintext.get(),
140  &num_bytes, out.get(), input_len));
141  EXPECT_EQ(static_cast<size_t>(num_bytes), input_len);
142  EXPECT_EQ(Bytes(test.plaintext), Bytes(plaintext.get(), input_len));
143  }
144 }
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