chromium/components/webcrypto/algorithms/rsa_sign.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 "base/numerics/safe_math.h"
#include "components/webcrypto/algorithms/rsa_sign.h"
#include "components/webcrypto/algorithms/util.h"
#include "components/webcrypto/blink_key_handle.h"
#include "components/webcrypto/status.h"
#include "crypto/openssl_util.h"
#include "third_party/blink/public/platform/web_crypto_key_algorithm.h"
#include "third_party/boringssl/src/include/openssl/digest.h"
#include "third_party/boringssl/src/include/openssl/evp.h"
#include "third_party/boringssl/src/include/openssl/rsa.h"

namespace webcrypto {

namespace {

// Extracts the OpenSSL key and digest from a WebCrypto key. The returned
// pointers will remain valid as long as |key| is alive.
Status GetPKeyAndDigest(const blink::WebCryptoKey& key,
                        EVP_PKEY** pkey,
                        const EVP_MD** digest) { … }

// Sets the PSS parameters on |pctx| if the key is for RSA-PSS.
//
// Otherwise returns Success without doing anything.
Status ApplyRsaPssOptions(const blink::WebCryptoKey& key,
                          const EVP_MD* const mgf_digest,
                          unsigned int salt_length_bytes,
                          EVP_PKEY_CTX* pctx) { … }

}  // namespace

Status RsaSign(const blink::WebCryptoKey& key,
               unsigned int pss_salt_length_bytes,
               base::span<const uint8_t> data,
               std::vector<uint8_t>* buffer) { … }

Status RsaVerify(const blink::WebCryptoKey& key,
                 unsigned int pss_salt_length_bytes,
                 base::span<const uint8_t> signature,
                 base::span<const uint8_t> data,
                 bool* signature_match) { … }

}  // namespace webcrypto