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/*
* Copyright (C) 2021 Sony Interactive Entertainment Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "OpenSSLUtilities.h"
#if ENABLE(WEB_CRYPTO)
#include "OpenSSLCryptoUniquePtr.h"
namespace WebCore {
const EVP_MD* digestAlgorithm(CryptoAlgorithmIdentifier hashFunction)
{
switch (hashFunction) {
case CryptoAlgorithmIdentifier::SHA_1:
return EVP_sha1();
case CryptoAlgorithmIdentifier::SHA_224:
return EVP_sha224();
case CryptoAlgorithmIdentifier::SHA_256:
return EVP_sha256();
case CryptoAlgorithmIdentifier::SHA_384:
return EVP_sha384();
case CryptoAlgorithmIdentifier::SHA_512:
return EVP_sha512();
default:
return nullptr;
}
}
std::optional<Vector<uint8_t>> calculateDigest(const EVP_MD* algorithm, const Vector<uint8_t>& message)
{
EvpDigestCtxPtr ctx;
if (!(ctx = EvpDigestCtxPtr(EVP_MD_CTX_create())))
return std::nullopt;
int digestLength = EVP_MD_size(algorithm);
if (digestLength <= 0)
return std::nullopt;
Vector<uint8_t> digest(digestLength);
if (EVP_DigestInit_ex(ctx.get(), algorithm, nullptr) != 1)
return std::nullopt;
if (EVP_DigestUpdate(ctx.get(), message.data(), message.size()) != 1)
return std::nullopt;
if (EVP_DigestFinal_ex(ctx.get(), digest.data(), nullptr) != 1)
return std::nullopt;
return digest;
}
Vector<uint8_t> convertToBytes(const BIGNUM* bignum)
{
Vector<uint8_t> bytes(BN_num_bytes(bignum));
BN_bn2bin(bignum, bytes.data());
return bytes;
}
Vector<uint8_t> convertToBytesExpand(const BIGNUM* bignum, size_t minimumBufferSize)
{
int length = BN_num_bytes(bignum);
if (length < 0)
return { };
size_t bufferSize = std::max<size_t>(length, minimumBufferSize);
Vector<uint8_t> bytes(bufferSize);
size_t paddingLength = bufferSize - length;
if (paddingLength > 0) {
uint8_t padding = BN_is_negative(bignum) ? 0xFF : 0x00;
for (size_t i = 0; i < paddingLength; i++)
bytes[i] = padding;
}
BN_bn2bin(bignum, bytes.data() + paddingLength);
return bytes;
}
BIGNUMPtr convertToBigNumber(const Vector<uint8_t>& bytes)
{
return BIGNUMPtr(BN_bin2bn(bytes.data(), bytes.size(), nullptr));
}
bool AESKey::setKey(const Vector<uint8_t>& key, int enc)
{
size_t keySize = key.size() * 8;
if (keySize != 128 && keySize != 192 && keySize != 256)
return false;
if (enc == AES_ENCRYPT) {
if (AES_set_encrypt_key(key.data(), keySize, &m_key) < 0)
return false;
return true;
}
if (enc == AES_DECRYPT) {
if (AES_set_decrypt_key(key.data(), keySize, &m_key) < 0)
return false;
return true;
}
ASSERT_NOT_REACHED();
return false;
}
AESKey::~AESKey()
{
memset(&m_key, 0, sizeof m_key);
}
} // namespace WebCore
#endif // ENABLE(WEB_CRYPTO)
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