268 lines
9.4 KiB
C++
268 lines
9.4 KiB
C++
/* Copyright (c) 2015, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#include <stdio.h>
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#include <algorithm>
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#include <vector>
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#include <gtest/gtest.h>
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#include <openssl/cipher.h>
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#include <openssl/cmac.h>
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#include <openssl/mem.h>
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#include "../test/file_test.h"
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#include "../test/test_util.h"
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#include "../test/wycheproof_util.h"
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static void test(const char *name, const uint8_t *key, size_t key_len,
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const uint8_t *msg, size_t msg_len, const uint8_t *expected) {
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SCOPED_TRACE(name);
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// Test the single-shot API.
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uint8_t out[16];
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ASSERT_TRUE(AES_CMAC(out, key, key_len, msg, msg_len));
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EXPECT_EQ(Bytes(expected, sizeof(out)), Bytes(out));
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bssl::UniquePtr<CMAC_CTX> ctx(CMAC_CTX_new());
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ASSERT_TRUE(ctx);
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ASSERT_TRUE(CMAC_Init(ctx.get(), key, key_len, EVP_aes_128_cbc(), NULL));
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for (unsigned chunk_size = 1; chunk_size <= msg_len; chunk_size++) {
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SCOPED_TRACE(chunk_size);
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ASSERT_TRUE(CMAC_Reset(ctx.get()));
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size_t done = 0;
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while (done < msg_len) {
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size_t todo = std::min(msg_len - done, static_cast<size_t>(chunk_size));
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ASSERT_TRUE(CMAC_Update(ctx.get(), msg + done, todo));
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done += todo;
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}
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size_t out_len;
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ASSERT_TRUE(CMAC_Final(ctx.get(), out, &out_len));
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EXPECT_EQ(Bytes(expected, sizeof(out)), Bytes(out, out_len));
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}
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// Test that |CMAC_CTX_copy| works.
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ASSERT_TRUE(CMAC_Reset(ctx.get()));
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size_t chunk = msg_len / 2;
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ASSERT_TRUE(CMAC_Update(ctx.get(), msg, chunk));
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bssl::UniquePtr<CMAC_CTX> ctx2(CMAC_CTX_new());
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ASSERT_TRUE(ctx2);
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ASSERT_TRUE(CMAC_CTX_copy(ctx2.get(), ctx.get()));
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ASSERT_TRUE(CMAC_Update(ctx2.get(), msg + chunk, msg_len - chunk));
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size_t out_len;
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ASSERT_TRUE(CMAC_Final(ctx2.get(), out, &out_len));
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EXPECT_EQ(Bytes(expected, sizeof(out)), Bytes(out, out_len));
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}
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TEST(CMACTest, RFC4493TestVectors) {
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static const uint8_t kKey[16] = {
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0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6,
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0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c,
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};
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static const uint8_t kOut1[16] = {
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0xbb, 0x1d, 0x69, 0x29, 0xe9, 0x59, 0x37, 0x28,
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0x7f, 0xa3, 0x7d, 0x12, 0x9b, 0x75, 0x67, 0x46,
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};
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static const uint8_t kMsg2[] = {
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0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96,
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0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
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};
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static const uint8_t kOut2[16] = {
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0x07, 0x0a, 0x16, 0xb4, 0x6b, 0x4d, 0x41, 0x44,
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0xf7, 0x9b, 0xdd, 0x9d, 0xd0, 0x4a, 0x28, 0x7c,
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};
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static const uint8_t kMsg3[] = {
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0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96,
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0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
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0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c,
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0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
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0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11,
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};
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static const uint8_t kOut3[16] = {
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0xdf, 0xa6, 0x67, 0x47, 0xde, 0x9a, 0xe6, 0x30,
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0x30, 0xca, 0x32, 0x61, 0x14, 0x97, 0xc8, 0x27,
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};
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static const uint8_t kMsg4[] = {
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0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96,
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0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
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0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c,
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0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
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0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11,
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0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
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0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17,
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0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10,
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};
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static const uint8_t kOut4[16] = {
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0x51, 0xf0, 0xbe, 0xbf, 0x7e, 0x3b, 0x9d, 0x92,
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0xfc, 0x49, 0x74, 0x17, 0x79, 0x36, 0x3c, 0xfe,
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};
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test("RFC 4493 #1", kKey, sizeof(kKey), NULL, 0, kOut1);
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test("RFC 4493 #2", kKey, sizeof(kKey), kMsg2, sizeof(kMsg2), kOut2);
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test("RFC 4493 #3", kKey, sizeof(kKey), kMsg3, sizeof(kMsg3), kOut3);
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test("RFC 4493 #4", kKey, sizeof(kKey), kMsg4, sizeof(kMsg4), kOut4);
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}
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TEST(CMACTest, Wycheproof) {
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FileTestGTest("third_party/wycheproof_testvectors/aes_cmac_test.txt",
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[](FileTest *t) {
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std::string key_size, tag_size;
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ASSERT_TRUE(t->GetInstruction(&key_size, "keySize"));
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ASSERT_TRUE(t->GetInstruction(&tag_size, "tagSize"));
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WycheproofResult result;
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ASSERT_TRUE(GetWycheproofResult(t, &result));
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std::vector<uint8_t> key, msg, tag;
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ASSERT_TRUE(t->GetBytes(&key, "key"));
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ASSERT_TRUE(t->GetBytes(&msg, "msg"));
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ASSERT_TRUE(t->GetBytes(&tag, "tag"));
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const EVP_CIPHER *cipher;
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switch (atoi(key_size.c_str())) {
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case 128:
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cipher = EVP_aes_128_cbc();
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break;
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case 192:
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cipher = EVP_aes_192_cbc();
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break;
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case 256:
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cipher = EVP_aes_256_cbc();
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break;
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default:
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// Some test vectors intentionally give the wrong key size. Our API
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// requires the caller pick the sized CBC primitive, so these tests
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// aren't useful for us.
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EXPECT_EQ(WycheproofResult::kInvalid, result);
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return;
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}
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size_t tag_len = static_cast<size_t>(atoi(tag_size.c_str())) / 8;
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uint8_t out[16];
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bssl::UniquePtr<CMAC_CTX> ctx(CMAC_CTX_new());
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ASSERT_TRUE(ctx);
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ASSERT_TRUE(CMAC_Init(ctx.get(), key.data(), key.size(), cipher, NULL));
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ASSERT_TRUE(CMAC_Update(ctx.get(), msg.data(), msg.size()));
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size_t out_len;
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ASSERT_TRUE(CMAC_Final(ctx.get(), out, &out_len));
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// Truncate the tag, if requested.
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out_len = std::min(out_len, tag_len);
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if (result == WycheproofResult::kValid) {
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EXPECT_EQ(Bytes(tag), Bytes(out, out_len));
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// Test the streaming API as well.
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ASSERT_TRUE(CMAC_Reset(ctx.get()));
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for (uint8_t b : msg) {
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ASSERT_TRUE(CMAC_Update(ctx.get(), &b, 1));
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}
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ASSERT_TRUE(CMAC_Final(ctx.get(), out, &out_len));
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out_len = std::min(out_len, tag_len);
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EXPECT_EQ(Bytes(tag), Bytes(out, out_len));
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} else {
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// Wycheproof's invalid tests assume the implementation internally does
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// the comparison, whereas our API only computes the tag. Check that
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// they're not equal, but these tests are mostly not useful for us.
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EXPECT_NE(Bytes(tag), Bytes(out, out_len));
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}
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});
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}
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static void RunCAVPTest(const char *path, const EVP_CIPHER *cipher,
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bool is_3des) {
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FileTestGTest(path, [&](FileTest *t) {
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t->IgnoreAttribute("Count");
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t->IgnoreAttribute("Klen");
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std::string t_len, m_len, result;
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ASSERT_TRUE(t->GetAttribute(&t_len, "Tlen"));
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ASSERT_TRUE(t->GetAttribute(&m_len, "Mlen"));
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ASSERT_TRUE(t->GetAttribute(&result, "Result"));
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std::vector<uint8_t> key, msg, mac;
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if (is_3des) {
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std::vector<uint8_t> key2, key3;
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ASSERT_TRUE(t->GetBytes(&key, "Key1"));
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ASSERT_TRUE(t->GetBytes(&key2, "Key2"));
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ASSERT_TRUE(t->GetBytes(&key3, "Key3"));
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key.insert(key.end(), key2.begin(), key2.end());
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key.insert(key.end(), key3.begin(), key3.end());
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} else {
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ASSERT_TRUE(t->GetBytes(&key, "Key"));
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}
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ASSERT_TRUE(t->GetBytes(&msg, "Msg"));
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ASSERT_TRUE(t->GetBytes(&mac, "Mac"));
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// CAVP's uses a non-empty Msg attribute and zero Mlen for the empty string.
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if (atoi(m_len.c_str()) == 0) {
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msg.clear();
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} else {
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EXPECT_EQ(static_cast<size_t>(atoi(m_len.c_str())), msg.size());
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}
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size_t tag_len = static_cast<size_t>(atoi(t_len.c_str()));
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uint8_t out[16];
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bssl::UniquePtr<CMAC_CTX> ctx(CMAC_CTX_new());
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ASSERT_TRUE(ctx);
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ASSERT_TRUE(CMAC_Init(ctx.get(), key.data(), key.size(), cipher, NULL));
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ASSERT_TRUE(CMAC_Update(ctx.get(), msg.data(), msg.size()));
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size_t out_len;
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ASSERT_TRUE(CMAC_Final(ctx.get(), out, &out_len));
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// Truncate the tag, if requested.
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out_len = std::min(out_len, tag_len);
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ASSERT_FALSE(result.empty());
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if (result[0] == 'P') {
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EXPECT_EQ(Bytes(mac), Bytes(out, out_len));
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// Test the streaming API as well.
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ASSERT_TRUE(CMAC_Reset(ctx.get()));
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for (uint8_t b : msg) {
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ASSERT_TRUE(CMAC_Update(ctx.get(), &b, 1));
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}
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ASSERT_TRUE(CMAC_Final(ctx.get(), out, &out_len));
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out_len = std::min(out_len, tag_len);
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EXPECT_EQ(Bytes(mac), Bytes(out, out_len));
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} else {
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// CAVP's invalid tests assume the implementation internally does the
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// comparison, whereas our API only computes the tag. Check that they're
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// not equal, but these tests are mostly not useful for us.
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EXPECT_NE(Bytes(mac), Bytes(out, out_len));
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}
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});
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}
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TEST(CMACTest, CAVPAES128) {
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RunCAVPTest("crypto/cmac/cavp_aes128_cmac_tests.txt", EVP_aes_128_cbc(),
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false);
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}
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TEST(CMACTest, CAVPAES192) {
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RunCAVPTest("crypto/cmac/cavp_aes192_cmac_tests.txt", EVP_aes_192_cbc(),
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false);
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}
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TEST(CMACTest, CAVPAES256) {
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RunCAVPTest("crypto/cmac/cavp_aes256_cmac_tests.txt", EVP_aes_256_cbc(),
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false);
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}
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TEST(CMACTest, CAVP3DES) {
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RunCAVPTest("crypto/cmac/cavp_3des_cmac_tests.txt", EVP_des_ede3_cbc(), true);
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}
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