crypto/fipsmodule/modes/gcm_test.cc

/* ====================================================================
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#include <stdio.h>
#include <string.h>

#include <vector>

#include <gtest/gtest.h>

#include <openssl/aes.h>

#include "internal.h"
#include "../../test/file_test.h"
#include "../../test/test_util.h"


TEST(GCMTest, TestVectors) {
  FileTestGTest("crypto/fipsmodule/modes/gcm_tests.txt", [](FileTest *t) {
    std::vector<uint8_t> key, plaintext, additional_data, nonce, ciphertext,
        tag;
    ASSERT_TRUE(t->GetBytes(&key, "Key"));
    ASSERT_TRUE(t->GetBytes(&plaintext, "Plaintext"));
    ASSERT_TRUE(t->GetBytes(&additional_data, "AdditionalData"));
    ASSERT_TRUE(t->GetBytes(&nonce, "Nonce"));
    ASSERT_TRUE(t->GetBytes(&ciphertext, "Ciphertext"));
    ASSERT_TRUE(t->GetBytes(&tag, "Tag"));

    ASSERT_EQ(plaintext.size(), ciphertext.size());
    ASSERT_TRUE(key.size() == 16 || key.size() == 24 || key.size() == 32);
    ASSERT_EQ(16u, tag.size());

    std::vector<uint8_t> out(plaintext.size());
    AES_KEY aes_key;
    ASSERT_EQ(0, AES_set_encrypt_key(key.data(), key.size() * 8, &aes_key));

    GCM128_CONTEXT ctx;
    OPENSSL_memset(&ctx, 0, sizeof(ctx));
    CRYPTO_gcm128_init_key(&ctx.gcm_key, &aes_key, AES_encrypt, 0);
    CRYPTO_gcm128_setiv(&ctx, &aes_key, nonce.data(), nonce.size());
    if (!additional_data.empty()) {
      CRYPTO_gcm128_aad(&ctx, additional_data.data(), additional_data.size());
    }
    if (!plaintext.empty()) {
      CRYPTO_gcm128_encrypt(&ctx, &aes_key, plaintext.data(), out.data(),
                            plaintext.size());
    }
    ASSERT_TRUE(CRYPTO_gcm128_finish(&ctx, tag.data(), tag.size()));
    EXPECT_EQ(Bytes(ciphertext), Bytes(out));

    CRYPTO_gcm128_setiv(&ctx, &aes_key, nonce.data(), nonce.size());
    OPENSSL_memset(out.data(), 0, out.size());
    if (!additional_data.empty()) {
      CRYPTO_gcm128_aad(&ctx, additional_data.data(), additional_data.size());
    }
    if (!ciphertext.empty()) {
      CRYPTO_gcm128_decrypt(&ctx, &aes_key, ciphertext.data(), out.data(),
                            ciphertext.size());
    }
    ASSERT_TRUE(CRYPTO_gcm128_finish(&ctx, tag.data(), tag.size()));
    EXPECT_EQ(Bytes(plaintext), Bytes(out));
  });
}

TEST(GCMTest, ByteSwap) {
  EXPECT_EQ(0x04030201u, CRYPTO_bswap4(0x01020304u));
  EXPECT_EQ(UINT64_C(0x0807060504030201),
            CRYPTO_bswap8(UINT64_C(0x0102030405060708)));
}