chromium/components/webcrypto/algorithms/hmac.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.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

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

#include <memory>

#include "base/check_op.h"
#include "base/numerics/safe_math.h"
#include "components/webcrypto/algorithm_implementation.h"
#include "components/webcrypto/algorithms/secret_key_util.h"
#include "components/webcrypto/algorithms/util.h"
#include "components/webcrypto/blink_key_handle.h"
#include "components/webcrypto/jwk.h"
#include "components/webcrypto/status.h"
#include "crypto/openssl_util.h"
#include "crypto/secure_util.h"
#include "third_party/blink/public/platform/web_crypto_algorithm_params.h"
#include "third_party/blink/public/platform/web_crypto_key_algorithm.h"
#include "third_party/boringssl/src/include/openssl/hmac.h"

namespace webcrypto {

namespace {

Status GetDigestBlockSizeBits(const blink::WebCryptoAlgorithm& algorithm,
                              unsigned int* block_size_bits) { … }

// Gets the requested key length in bits for an HMAC import operation.
Status GetHmacImportKeyLengthBits(
    const blink::WebCryptoHmacImportParams* params,
    unsigned int key_data_byte_length,
    unsigned int* keylen_bits) { … }

const char* GetJwkHmacAlgorithmName(blink::WebCryptoAlgorithmId hash) { … }

const blink::WebCryptoKeyUsageMask kAllKeyUsages = …;

Status SignHmac(const std::vector<uint8_t>& raw_key,
                const blink::WebCryptoAlgorithm& hash,
                base::span<const uint8_t> data,
                std::vector<uint8_t>* buffer) { … }

class HmacImplementation : public AlgorithmImplementation { … };

}  // namespace

std::unique_ptr<AlgorithmImplementation> CreateHmacImplementation() { … }

}  // namespace webcrypto