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// Copyright (c) 2012 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.
#ifndef CRYPTO_SHA2_H_
#define CRYPTO_SHA2_H_
#include <stddef.h>
#include <array>
#include <string>
#include "base/containers/span.h"
#include "base/strings/string_piece.h"
#include "crypto/crypto_export.h"
namespace crypto {
// These functions perform SHA-256 operations.
// Functions for SHA-384 and SHA-512 can be added when the need arises.
static const size_t kSHA256Length = 32; // Length in bytes of a SHA-256 hash.
// Computes the SHA-256 hash of |input|.
CRYPTO_EXPORT std::array<uint8_t, kSHA256Length> SHA256Hash(
base::span<const uint8_t> input);
// Convenience version of the above that returns the result in a 32-byte
// string.
CRYPTO_EXPORT std::string SHA256HashString(base::StringPiece str);
// Computes the SHA-256 hash of the input string 'str' and stores the first
// 'len' bytes of the hash in the output buffer 'output'. If 'len' > 32,
// only 32 bytes (the full hash) are stored in the 'output' buffer.
CRYPTO_EXPORT void SHA256HashString(base::StringPiece str,
void* output,
size_t len);
} // namespace crypto
#endif // CRYPTO_SHA2_H_