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
11bool 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  // null terminates result since result is base64 text!
16  int input_size = static_cast<int>(input.size());
17
18  // modp_b64_encode_len() returns at least 1, so temp[0] is safe to use.
19  size_t output_size = modp_b64_encode(&(temp[0]), input.data(), input_size);
20  if (output_size == MODP_B64_ERROR)
21    return false;
22
23  temp.resize(output_size);  // strips off null byte
24  output->swap(temp);
25  return true;
26}
27
28bool Base64Decode(const StringPiece& input, std::string* output) {
29  std::string temp;
30  temp.resize(modp_b64_decode_len(input.size()));
31
32  // does not null terminate result since result is binary data!
33  size_t input_size = input.size();
34  size_t output_size = modp_b64_decode(&(temp[0]), input.data(), input_size);
35  if (output_size == MODP_B64_ERROR)
36    return false;
37
38  temp.resize(output_size);
39  output->swap(temp);
40  return true;
41}
42
43}  // namespace base
44