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