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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 
5 #include "base/base64.h"
6 
7 #include <stddef.h>
8 
9 #include "third_party/modp_b64/modp_b64.h"
10 
11 namespace base {
12 
Base64Encode(const StringPiece & input,std::string * output)13 void Base64Encode(const StringPiece& input, std::string* output) {
14   std::string temp;
15   temp.resize(modp_b64_encode_len(input.size()));  // makes room for null byte
16 
17   // modp_b64_encode_len() returns at least 1, so temp[0] is safe to use.
18   size_t output_size = modp_b64_encode(&(temp[0]), input.data(), input.size());
19 
20   temp.resize(output_size);  // strips off null byte
21   output->swap(temp);
22 }
23 
Base64Decode(const StringPiece & input,std::string * output)24 bool Base64Decode(const StringPiece& input, std::string* output) {
25   std::string temp;
26   temp.resize(modp_b64_decode_len(input.size()));
27 
28   // does not null terminate result since result is binary data!
29   size_t input_size = input.size();
30   size_t output_size = modp_b64_decode(&(temp[0]), input.data(), input_size);
31   if (output_size == MODP_B64_ERROR)
32     return false;
33 
34   temp.resize(output_size);
35   output->swap(temp);
36   return true;
37 }
38 
39 }  // namespace base
40