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/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
* Copyright (C) 2017 Metrological Group B.V.
* Copyright (C) 2017 Igalia S.L.
*
* 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 "GCryptUtilities.h"
namespace WebCore {
ASCIILiteral hashAlgorithmName(CryptoAlgorithmIdentifier identifier)
{
switch (identifier) {
case CryptoAlgorithmIdentifier::SHA_1:
return "sha1"_s;
case CryptoAlgorithmIdentifier::DEPRECATED_SHA_224:
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE(sha224DeprecationMessage);
return "sha256"_s;
case CryptoAlgorithmIdentifier::SHA_256:
return "sha256"_s;
case CryptoAlgorithmIdentifier::SHA_384:
return "sha384"_s;
case CryptoAlgorithmIdentifier::SHA_512:
return "sha512"_s;
default:
return { };
}
}
std::optional<int> hmacAlgorithm(CryptoAlgorithmIdentifier identifier)
{
switch (identifier) {
case CryptoAlgorithmIdentifier::SHA_1:
return GCRY_MAC_HMAC_SHA1;
case CryptoAlgorithmIdentifier::DEPRECATED_SHA_224:
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE(sha224DeprecationMessage);
return GCRY_MAC_HMAC_SHA256;
case CryptoAlgorithmIdentifier::SHA_256:
return GCRY_MAC_HMAC_SHA256;
case CryptoAlgorithmIdentifier::SHA_384:
return GCRY_MAC_HMAC_SHA384;
case CryptoAlgorithmIdentifier::SHA_512:
return GCRY_MAC_HMAC_SHA512;
default:
return std::nullopt;
}
}
std::optional<int> digestAlgorithm(CryptoAlgorithmIdentifier identifier)
{
switch (identifier) {
case CryptoAlgorithmIdentifier::SHA_1:
return GCRY_MD_SHA1;
case CryptoAlgorithmIdentifier::DEPRECATED_SHA_224:
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE(sha224DeprecationMessage);
return GCRY_MD_SHA256;
case CryptoAlgorithmIdentifier::SHA_256:
return GCRY_MD_SHA256;
case CryptoAlgorithmIdentifier::SHA_384:
return GCRY_MD_SHA384;
case CryptoAlgorithmIdentifier::SHA_512:
return GCRY_MD_SHA512;
default:
return std::nullopt;
}
}
std::optional<PAL::CryptoDigest::Algorithm> hashCryptoDigestAlgorithm(CryptoAlgorithmIdentifier identifier)
{
switch (identifier) {
case CryptoAlgorithmIdentifier::SHA_1:
return PAL::CryptoDigest::Algorithm::SHA_1;
case CryptoAlgorithmIdentifier::DEPRECATED_SHA_224:
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE(sha224DeprecationMessage);
return PAL::CryptoDigest::Algorithm::SHA_256;
case CryptoAlgorithmIdentifier::SHA_256:
return PAL::CryptoDigest::Algorithm::SHA_256;
case CryptoAlgorithmIdentifier::SHA_384:
return PAL::CryptoDigest::Algorithm::SHA_384;
case CryptoAlgorithmIdentifier::SHA_512:
return PAL::CryptoDigest::Algorithm::SHA_512;
default:
return std::nullopt;
}
}
std::optional<size_t> mpiLength(gcry_mpi_t paramMPI)
{
// Retrieve the MPI length for the unsigned format.
size_t dataLength = 0;
gcry_error_t error = gcry_mpi_print(GCRYMPI_FMT_USG, nullptr, 0, &dataLength, paramMPI);
if (error != GPG_ERR_NO_ERROR) {
PAL::GCrypt::logError(error);
return std::nullopt;
}
return dataLength;
}
std::optional<size_t> mpiLength(gcry_sexp_t paramSexp)
{
// Retrieve the MPI value stored in the s-expression: (name mpi-data)
PAL::GCrypt::Handle<gcry_mpi_t> paramMPI(gcry_sexp_nth_mpi(paramSexp, 1, GCRYMPI_FMT_USG));
if (!paramMPI)
return std::nullopt;
return mpiLength(paramMPI);
}
std::optional<Vector<uint8_t>> mpiData(gcry_mpi_t paramMPI)
{
// Retrieve the MPI length.
auto length = mpiLength(paramMPI);
if (!length)
return std::nullopt;
// Copy the MPI data into a properly-sized buffer.
Vector<uint8_t> output(*length);
gcry_error_t error = gcry_mpi_print(GCRYMPI_FMT_USG, output.data(), output.size(), nullptr, paramMPI);
if (error != GPG_ERR_NO_ERROR) {
PAL::GCrypt::logError(error);
return std::nullopt;
}
return output;
}
std::optional<Vector<uint8_t>> mpiZeroPrefixedData(gcry_mpi_t paramMPI, size_t targetLength)
{
// Retrieve the MPI length. Bail if the retrieved length is longer than target length.
auto length = mpiLength(paramMPI);
if (!length || *length > targetLength)
return std::nullopt;
// Fill out the output buffer with zeros. Properly determine the zero prefix length,
// and copy the MPI data into memory area following the prefix (if any).
Vector<uint8_t> output(targetLength, 0);
size_t prefixLength = targetLength - *length;
gcry_error_t error = gcry_mpi_print(GCRYMPI_FMT_USG, const_cast<uint8_t*>(output.subspan(prefixLength).data()), targetLength, nullptr, paramMPI);
if (error != GPG_ERR_NO_ERROR) {
PAL::GCrypt::logError(error);
return std::nullopt;
}
return output;
}
std::optional<Vector<uint8_t>> mpiData(gcry_sexp_t paramSexp)
{
// Retrieve the MPI value stored in the s-expression: (name mpi-data)
PAL::GCrypt::Handle<gcry_mpi_t> paramMPI(gcry_sexp_nth_mpi(paramSexp, 1, GCRYMPI_FMT_USG));
if (!paramMPI)
return std::nullopt;
return mpiData(paramMPI);
}
std::optional<Vector<uint8_t>> mpiZeroPrefixedData(gcry_sexp_t paramSexp, size_t targetLength)
{
// Retrieve the MPI value stored in the s-expression: (name mpi-data)
PAL::GCrypt::Handle<gcry_mpi_t> paramMPI(gcry_sexp_nth_mpi(paramSexp, 1, GCRYMPI_FMT_USG));
if (!paramMPI)
return std::nullopt;
return mpiZeroPrefixedData(paramMPI, targetLength);
}
std::optional<Vector<uint8_t>> mpiSignedData(gcry_mpi_t mpi)
{
auto data = mpiData(mpi);
if (!data)
return std::nullopt;
if (data->at(0) & 0x80)
data->insert(0, 0x00);
return data;
}
std::optional<Vector<uint8_t>> mpiSignedData(gcry_sexp_t paramSexp)
{
auto data = mpiData(paramSexp);
if (!data)
return std::nullopt;
if (data->at(0) & 0x80)
data->insert(0, 0x00);
return data;
}
} // namespace WebCore
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