1 // Copyright (c) 2019, 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.
6 //
7 // THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 // WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 // MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10 // SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 // OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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 CastTestCase {
23 uint8_t key[16];
24 uint8_t plaintext[16];
25 uint8_t iv[8];
26 uint8_t ecb_ciphertext[16];
27 uint8_t cbc_ciphertext[24];
28 };
29
30 static const CastTestCase kTests[] = {
31 // Randomly generated test cases. Checked against vanilla OpenSSL.
32 {
33 {0xbb, 0x56, 0xb1, 0x27, 0x7c, 0x4c, 0xdd, 0x5a, 0x99, 0x90, 0x1e, 0x6f,
34 0xeb, 0x36, 0x6c, 0xf3},
35 {0xa6, 0x5b, 0xe0, 0x99, 0xad, 0x5d, 0x91, 0x98, 0x37, 0xc1, 0xa4, 0x7f,
36 0x01, 0x24, 0x9a, 0x6b},
37 {0xd5, 0x8a, 0x5c, 0x29, 0xeb, 0xee, 0xed, 0x76},
38 {0x01, 0x8d, 0x1b, 0x42, 0xb8, 0x77, 0xc8, 0x84, 0x25, 0x7d, 0xd4, 0x89,
39 0x8d, 0xc1, 0xbc, 0x2a},
40 {0xc1, 0x05, 0xa1, 0x9a, 0xb4, 0xc4, 0xd0, 0x15,
41 0x9d, 0xfd, 0xea, 0xd0, 0xc3, 0x54, 0xe5, 0x33,
42 0x26, 0xac, 0x25, 0xf3, 0x48, 0xbc, 0xf6, 0xa2},
43 },
44 {
45 {0x5d, 0x98, 0xa9, 0xd2, 0x27, 0x5d, 0xc8, 0x8c, 0x8c, 0xee, 0x23, 0x7f,
46 0x8e, 0x2b, 0xd4, 0x8d},
47 {0x60, 0xec, 0x31, 0xda, 0x25, 0x07, 0x02, 0x14, 0x84, 0x44, 0x96, 0xa6,
48 0x04, 0x81, 0xca, 0x4e},
49 {0x96, 0x4c, 0xa4, 0x07, 0xee, 0x1c, 0xd1, 0xfb},
50 {0x58, 0x62, 0x29, 0x62, 0x23, 0x69, 0x9e, 0xe8, 0x27, 0xc2, 0xcd, 0x5b,
51 0x35, 0xf1, 0xdf, 0xa4},
52 {0x1c, 0xd0, 0x29, 0xe5, 0xf3, 0xdb, 0x65, 0x60,
53 0x05, 0xde, 0x01, 0x2b, 0x10, 0x09, 0x44, 0x56,
54 0x59, 0x44, 0x00, 0x26, 0xdb, 0xb3, 0x2d, 0x98},
55 },
56 };
57
TEST(CAST,ECB)58 TEST(CAST, ECB) {
59 unsigned test_num = 0;
60 for (const auto &test : kTests) {
61 test_num++;
62 SCOPED_TRACE(test_num);
63
64 uint8_t out[sizeof(test.ecb_ciphertext)];
65 int out_bytes, final_bytes;
66
67 bssl::ScopedEVP_CIPHER_CTX ctx;
68 ASSERT_TRUE(EVP_EncryptInit_ex(ctx.get(), EVP_cast5_ecb(), nullptr,
69 test.key, nullptr));
70 ASSERT_TRUE(EVP_CIPHER_CTX_set_padding(ctx.get(), 0 /* no padding */));
71 ASSERT_TRUE(EVP_EncryptUpdate(ctx.get(), out, &out_bytes, test.plaintext,
72 sizeof(test.plaintext)));
73 ASSERT_TRUE(EVP_EncryptFinal_ex(ctx.get(), out + out_bytes, &final_bytes));
74 EXPECT_EQ(static_cast<size_t>(out_bytes + final_bytes),
75 sizeof(test.plaintext));
76 EXPECT_EQ(Bytes(test.ecb_ciphertext), Bytes(out));
77
78 bssl::ScopedEVP_CIPHER_CTX decrypt_ctx;
79 ASSERT_TRUE(EVP_DecryptInit_ex(decrypt_ctx.get(), EVP_cast5_ecb(), nullptr,
80 test.key, nullptr));
81 ASSERT_TRUE(
82 EVP_CIPHER_CTX_set_padding(decrypt_ctx.get(), 0 /* no padding */));
83 ASSERT_TRUE(EVP_DecryptUpdate(decrypt_ctx.get(), out, &out_bytes,
84 test.ecb_ciphertext,
85 sizeof(test.ecb_ciphertext)));
86 ASSERT_TRUE(
87 EVP_DecryptFinal_ex(decrypt_ctx.get(), out + out_bytes, &final_bytes));
88 EXPECT_EQ(static_cast<size_t>(out_bytes + final_bytes),
89 sizeof(test.plaintext));
90 EXPECT_EQ(Bytes(test.plaintext), Bytes(out));
91 }
92 }
93
TEST(CAST,CBC)94 TEST(CAST, CBC) {
95 unsigned test_num = 0;
96 for (const auto &test : kTests) {
97 test_num++;
98 SCOPED_TRACE(test_num);
99
100 uint8_t out[sizeof(test.cbc_ciphertext)];
101 int out_bytes, final_bytes;
102
103 bssl::ScopedEVP_CIPHER_CTX ctx;
104 ASSERT_TRUE(EVP_EncryptInit_ex(ctx.get(), EVP_cast5_cbc(), nullptr,
105 test.key, test.iv));
106 ASSERT_TRUE(EVP_EncryptUpdate(ctx.get(), out, &out_bytes, test.plaintext,
107 sizeof(test.plaintext)));
108 EXPECT_TRUE(EVP_EncryptFinal_ex(ctx.get(), out + out_bytes, &final_bytes));
109 EXPECT_EQ(static_cast<size_t>(out_bytes + final_bytes),
110 sizeof(test.cbc_ciphertext));
111 EXPECT_EQ(Bytes(test.cbc_ciphertext), Bytes(out));
112
113 bssl::ScopedEVP_CIPHER_CTX decrypt_ctx;
114 ASSERT_TRUE(EVP_DecryptInit_ex(decrypt_ctx.get(), EVP_cast5_cbc(), nullptr,
115 test.key, test.iv));
116 ASSERT_TRUE(EVP_DecryptUpdate(decrypt_ctx.get(), out, &out_bytes,
117 test.cbc_ciphertext,
118 sizeof(test.cbc_ciphertext)));
119 EXPECT_TRUE(
120 EVP_DecryptFinal_ex(decrypt_ctx.get(), out + out_bytes, &final_bytes));
121 EXPECT_EQ(static_cast<size_t>(out_bytes + final_bytes),
122 sizeof(test.plaintext));
123 EXPECT_EQ(Bytes(test.plaintext), Bytes(out, out_bytes + final_bytes));
124 }
125 }
126