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/*
* Copyright (C) 2014 Igalia S.L.
* Copyright (C) 2016 SoftAtHome
*
* 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 "CryptoDigest.h"
#include <gcrypt.h>
namespace PAL {
struct CryptoDigestContext {
WTF_MAKE_STRUCT_FAST_ALLOCATED;
int algorithm;
gcry_md_hd_t md;
};
CryptoDigest::CryptoDigest()
: m_context(WTF::makeUnique<CryptoDigestContext>())
{
}
CryptoDigest::~CryptoDigest() = default;
static int getGcryptAlgorithm(CryptoDigest::Algorithm algorithm)
{
switch (algorithm) {
case CryptoDigest::Algorithm::SHA_1:
return GCRY_MD_SHA1;
case CryptoDigest::Algorithm::DEPRECATED_SHA_224:
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE("SHA224 is not supported.");
return GCRY_MD_SHA256;
case CryptoDigest::Algorithm::SHA_256:
return GCRY_MD_SHA256;
case CryptoDigest::Algorithm::SHA_384:
return GCRY_MD_SHA384;
case CryptoDigest::Algorithm::SHA_512:
return GCRY_MD_SHA512;
}
RELEASE_ASSERT_NOT_REACHED();
return GCRY_MD_SHA256;
}
std::unique_ptr<CryptoDigest> CryptoDigest::create(CryptoDigest::Algorithm algorithm)
{
int gcryptAlgorithm = getGcryptAlgorithm(algorithm);
std::unique_ptr<CryptoDigest> digest = WTF::makeUnique<CryptoDigest>();
digest->m_context->algorithm = gcryptAlgorithm;
gcry_md_open(&digest->m_context->md, gcryptAlgorithm, 0);
if (!digest->m_context->md)
return nullptr;
return digest;
}
void CryptoDigest::addBytes(std::span<const uint8_t> input)
{
gcry_md_write(m_context->md, static_cast<const void*>(input.data()), input.size());
}
Vector<uint8_t> CryptoDigest::computeHash()
{
size_t digestLen = gcry_md_get_algo_dlen(m_context->algorithm);
gcry_md_final(m_context->md);
Vector<uint8_t> result(unsafeMakeSpan<uint8_t>(gcry_md_read(m_context->md, 0), digestLen));
gcry_md_close(m_context->md);
return result;
}
} // namespace PAL
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