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/* Copyright (c) 2015, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#include <stdio.h>
#include <algorithm>
#include <gtest/gtest.h>
#include <openssl/cipher.h>
#include <openssl/cmac.h>
#include <openssl/mem.h>
#include "../test/test_util.h"
static void test(const char *name, const uint8_t *key, size_t key_len,
const uint8_t *msg, size_t msg_len, const uint8_t *expected) {
SCOPED_TRACE(name);
// Test the single-shot API.
uint8_t out[16];
ASSERT_TRUE(AES_CMAC(out, key, key_len, msg, msg_len));
EXPECT_EQ(Bytes(expected, sizeof(out)), Bytes(out));
bssl::UniquePtr<CMAC_CTX> ctx(CMAC_CTX_new());
ASSERT_TRUE(ctx);
ASSERT_TRUE(CMAC_Init(ctx.get(), key, key_len, EVP_aes_128_cbc(), NULL));
for (unsigned chunk_size = 1; chunk_size <= msg_len; chunk_size++) {
SCOPED_TRACE(chunk_size);
ASSERT_TRUE(CMAC_Reset(ctx.get()));
size_t done = 0;
while (done < msg_len) {
size_t todo = std::min(msg_len - done, static_cast<size_t>(chunk_size));
ASSERT_TRUE(CMAC_Update(ctx.get(), msg + done, todo));
done += todo;
}
size_t out_len;
ASSERT_TRUE(CMAC_Final(ctx.get(), out, &out_len));
EXPECT_EQ(Bytes(expected, sizeof(out)), Bytes(out, out_len));
}
}
TEST(CMACTest, RFC4493TestVectors) {
static const uint8_t kKey[16] = {
0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6,
0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c,
};
static const uint8_t kOut1[16] = {
0xbb, 0x1d, 0x69, 0x29, 0xe9, 0x59, 0x37, 0x28,
0x7f, 0xa3, 0x7d, 0x12, 0x9b, 0x75, 0x67, 0x46,
};
static const uint8_t kMsg2[] = {
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96,
0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
};
static const uint8_t kOut2[16] = {
0x07, 0x0a, 0x16, 0xb4, 0x6b, 0x4d, 0x41, 0x44,
0xf7, 0x9b, 0xdd, 0x9d, 0xd0, 0x4a, 0x28, 0x7c,
};
static const uint8_t kMsg3[] = {
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96,
0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c,
0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11,
};
static const uint8_t kOut3[16] = {
0xdf, 0xa6, 0x67, 0x47, 0xde, 0x9a, 0xe6, 0x30,
0x30, 0xca, 0x32, 0x61, 0x14, 0x97, 0xc8, 0x27,
};
static const uint8_t kMsg4[] = {
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96,
0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c,
0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11,
0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17,
0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10,
};
static const uint8_t kOut4[16] = {
0x51, 0xf0, 0xbe, 0xbf, 0x7e, 0x3b, 0x9d, 0x92,
0xfc, 0x49, 0x74, 0x17, 0x79, 0x36, 0x3c, 0xfe,
};
test("RFC 4493 #1", kKey, sizeof(kKey), NULL, 0, kOut1);
test("RFC 4493 #2", kKey, sizeof(kKey), kMsg2, sizeof(kMsg2), kOut2);
test("RFC 4493 #3", kKey, sizeof(kKey), kMsg3, sizeof(kMsg3), kOut3);
test("RFC 4493 #4", kKey, sizeof(kKey), kMsg4, sizeof(kMsg4), kOut4);
}
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