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
5#include "base/base64.h"
6
7#include "third_party/modp_b64/modp_b64.h"
8
9namespace base {
10
11void Base64Encode(const StringPiece& input, std::string* output) {
12  std::string temp;
13  temp.resize(modp_b64_encode_len(input.size()));  // makes room for null byte
14
15  // modp_b64_encode_len() returns at least 1, so temp[0] is safe to use.
16  size_t output_size = modp_b64_encode(&(temp[0]), input.data(), input.size());
17
18  temp.resize(output_size);  // strips off null byte
19  output->swap(temp);
20}
21
22bool Base64Decode(const StringPiece& input, std::string* output) {
23  std::string temp;
24  temp.resize(modp_b64_decode_len(input.size()));
25
26  // does not null terminate result since result is binary data!
27  size_t input_size = input.size();
28  size_t output_size = modp_b64_decode(&(temp[0]), input.data(), input_size);
29  if (output_size == MODP_B64_ERROR)
30    return false;
31
32  temp.resize(output_size);
33  output->swap(temp);
34  return true;
35}
36
37}  // namespace base
38