sha2.h 1.3 KB

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  1. // Copyright (c) 2012 The Chromium Authors. All rights reserved.
  2. // Use of this source code is governed by a BSD-style license that can be
  3. // found in the LICENSE file.
  4. #ifndef CRYPTO_SHA2_H_
  5. #define CRYPTO_SHA2_H_
  6. #include <stddef.h>
  7. #include <array>
  8. #include <string>
  9. #include "base/containers/span.h"
  10. #include "base/strings/string_piece.h"
  11. #include "crypto/crypto_export.h"
  12. namespace crypto {
  13. // These functions perform SHA-256 operations.
  14. //
  15. // Functions for SHA-384 and SHA-512 can be added when the need arises.
  16. static const size_t kSHA256Length = 32; // Length in bytes of a SHA-256 hash.
  17. // Computes the SHA-256 hash of |input|.
  18. CRYPTO_EXPORT std::array<uint8_t, kSHA256Length> SHA256Hash(
  19. base::span<const uint8_t> input);
  20. // Convenience version of the above that returns the result in a 32-byte
  21. // string.
  22. CRYPTO_EXPORT std::string SHA256HashString(base::StringPiece str);
  23. // Computes the SHA-256 hash of the input string 'str' and stores the first
  24. // 'len' bytes of the hash in the output buffer 'output'. If 'len' > 32,
  25. // only 32 bytes (the full hash) are stored in the 'output' buffer.
  26. CRYPTO_EXPORT void SHA256HashString(base::StringPiece str,
  27. void* output,
  28. size_t len);
  29. } // namespace crypto
  30. #endif // CRYPTO_SHA2_H_