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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "platform/Crypto.h"
#include "public/platform/Platform.h"
#include "public/platform/WebCrypto.h"
#include "public/platform/WebCryptoAlgorithm.h"
#include <memory>
namespace blink {
static WebCryptoAlgorithmId toWebCryptoAlgorithmId(HashAlgorithm algorithm) {
switch (algorithm) {
case HashAlgorithmSha1:
return WebCryptoAlgorithmIdSha1;
case HashAlgorithmSha256:
return WebCryptoAlgorithmIdSha256;
case HashAlgorithmSha384:
return WebCryptoAlgorithmIdSha384;
case HashAlgorithmSha512:
return WebCryptoAlgorithmIdSha512;
};
ASSERT_NOT_REACHED();
return WebCryptoAlgorithmIdSha256;
}
bool computeDigest(HashAlgorithm algorithm,
const char* digestable,
size_t length,
DigestValue& digestResult) {
WebCryptoAlgorithmId algorithmId = toWebCryptoAlgorithmId(algorithm);
WebCrypto* crypto = Platform::current()->crypto();
unsigned char* result;
unsigned resultSize;
ASSERT(crypto);
std::unique_ptr<WebCryptoDigestor> digestor =
crypto->createDigestor(algorithmId);
DCHECK(digestor);
if (!digestor->consume(reinterpret_cast<const unsigned char*>(digestable),
length) ||
!digestor->finish(result, resultSize))
return false;
digestResult.append(static_cast<uint8_t*>(result), resultSize);
return true;
}
std::unique_ptr<WebCryptoDigestor> createDigestor(HashAlgorithm algorithm) {
return Platform::current()->crypto()->createDigestor(
toWebCryptoAlgorithmId(algorithm));
}
void finishDigestor(WebCryptoDigestor* digestor, DigestValue& digestResult) {
unsigned char* result = 0;
unsigned resultSize = 0;
if (!digestor->finish(result, resultSize))
return;
ASSERT(result);
digestResult.append(static_cast<uint8_t*>(result), resultSize);
}
} // namespace blink
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