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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.
// TODO(jww) The original Blink-style header guard for this file conflicts with
// the header guard in Source/modules/crypto/Crypto.h, so this is a
// Chromium-style header guard instead. There is now a bug
// (https://crbug.com/360121) to track a proposal to change all header guards
// to a similar style. Thus, whenever that is resolved, this header guard
// should be changed to whatever style is agreed upon.
#ifndef SOURCE_PLATFORM_CRYPTO_H_
#define SOURCE_PLATFORM_CRYPTO_H_
#include <memory>
#include "third_party/blink/public/platform/web_crypto.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
#include "third_party/blink/renderer/platform/wtf/hash_set.h"
#include "third_party/blink/renderer/platform/wtf/string_hasher.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
static const size_t kMaxDigestSize = 64;
typedef Vector<uint8_t, kMaxDigestSize> DigestValue;
const size_t kSha1HashSize = 20;
enum HashAlgorithm {
kHashAlgorithmSha1,
kHashAlgorithmSha256,
kHashAlgorithmSha384,
kHashAlgorithmSha512
};
PLATFORM_EXPORT bool ComputeDigest(HashAlgorithm,
const char* digestable,
size_t length,
DigestValue& digest_result);
// Note: this will never return null.
PLATFORM_EXPORT std::unique_ptr<WebCryptoDigestor> CreateDigestor(
HashAlgorithm);
PLATFORM_EXPORT void FinishDigestor(WebCryptoDigestor*,
DigestValue& digest_result);
} // namespace blink
namespace WTF {
struct DigestValueHash {
STATIC_ONLY(DigestValueHash);
static unsigned GetHash(const blink::DigestValue& v) {
return StringHasher::ComputeHash(v.data(), v.size());
}
static bool Equal(const blink::DigestValue& a, const blink::DigestValue& b) {
return a == b;
}
static const bool safe_to_compare_to_empty_or_deleted = true;
};
template <>
struct DefaultHash<blink::DigestValue> {
STATIC_ONLY(DefaultHash);
typedef DigestValueHash Hash;
};
template <>
struct DefaultHash<blink::HashAlgorithm> {
STATIC_ONLY(DefaultHash);
typedef IntHash<blink::HashAlgorithm> Hash;
};
template <>
struct HashTraits<blink::HashAlgorithm>
: UnsignedWithZeroKeyHashTraits<blink::HashAlgorithm> {
STATIC_ONLY(HashTraits);
};
} // namespace WTF
#endif // SOURCE_PLATFORM_CRYPTO_H_