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// Copyright 2016 The Chromium Authors
// 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 <string_view>
#include <vector>
#include "base/containers/span.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::span<const uint8_t> input,
Base32EncodePolicy policy = Base32EncodePolicy::INCLUDE_PADDING);
// Decodes the |input| string piece from base32. Returns an empty vector on
// error, including if |input| is empty.
std::vector<uint8_t> Base32Decode(std::string_view input);
} // namespace base32
#endif // COMPONENTS_BASE32_BASE32_H_
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