File: base32.h

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// Copyright 2016 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 COMPONENTS_BASE32_BASE32_H_
#define COMPONENTS_BASE32_BASE32_H_

#include <string>

#include "base/strings/string_piece.h"

namespace base32 {

enum class Base32EncodePolicy {
  // Include the trailing padding in the output, when necessary.
  INCLUDE_PADDING,
  // Omit trailing padding in the output. Such an output will not be decodable
  // unless |input.size()| is known by the decoder. Its size is guaranteed to be
  // |ceil(input.size() * 8.0 / 5.0)|.
  OMIT_PADDING
};

// Encodes the |input| string in base32, defined in RFC 4648:
// https://tools.ietf.org/html/rfc4648#section-5
//
// The |policy| defines whether padding should be included or omitted from the
// encoded output.
std::string Base32Encode(
    base::StringPiece input,
    Base32EncodePolicy policy = Base32EncodePolicy::INCLUDE_PADDING);

}  // namespace base32

#endif  // COMPONENTS_BASE32_BASE32_H_