chromium/components/webcrypto/algorithms/aes_ctr_unittest.cc

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <stddef.h>
#include <stdint.h>

#include "base/containers/span.h"
#include "components/webcrypto/algorithm_dispatch.h"
#include "components/webcrypto/algorithms/test_helpers.h"
#include "components/webcrypto/status.h"
#include "third_party/blink/public/platform/web_crypto_algorithm_params.h"
#include "third_party/blink/public/platform/web_crypto_key_algorithm.h"

namespace webcrypto {

namespace {

// Creates an AES-CTR algorithm for encryption/decryption.
blink::WebCryptoAlgorithm CreateAesCtrAlgorithm(
    const std::vector<uint8_t>& counter,
    uint8_t length_bits) { … }

blink::WebCryptoKey AesCtrKeyFromBytes(const std::vector<uint8_t>& bytes) { … }

class WebCryptoAesCtrTest : public WebCryptoTestBase { … };

struct AesCtrKnownAnswer { … };

const char k128BitTestKey[] = …;
const char k256BitTestKey[] = …;

const AesCtrKnownAnswer kAesCtrKnownAnswers[] = …;

TEST_F(WebCryptoAesCtrTest, EncryptDecryptKnownAnswer) { … }

// The counter block must be exactly 16 bytes.
TEST_F(WebCryptoAesCtrTest, InvalidCounterBlockLength) { … }

TEST_F(WebCryptoAesCtrTest, InvalidCounterLength) { … }

// Tests wrap-around using a 4-bit counter.
//
// Wrap-around is allowed, however if the counter repeats itself an error should
// be thrown.
//
// Using a 4-bit counter it is possible to encrypt 16 blocks. However the 17th
// block would end up wrapping back to the starting value.
TEST_F(WebCryptoAesCtrTest, OverflowAndRepeatCounter) { … }

}  // namespace

}  // namespace webcrypto