15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/base64.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "third_party/modp_b64/modp_b64.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 11a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)void Base64Encode(const StringPiece& input, std::string* output) { 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string temp; 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) temp.resize(modp_b64_encode_len(input.size())); // makes room for null byte 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // modp_b64_encode_len() returns at least 1, so temp[0] is safe to use. 16a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) size_t output_size = modp_b64_encode(&(temp[0]), input.data(), input.size()); 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) temp.resize(output_size); // strips off null byte 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) output->swap(temp); 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool Base64Decode(const StringPiece& input, std::string* output) { 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string temp; 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) temp.resize(modp_b64_decode_len(input.size())); 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // does not null terminate result since result is binary data! 272a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) size_t input_size = input.size(); 282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) size_t output_size = modp_b64_decode(&(temp[0]), input.data(), input_size); 292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (output_size == MODP_B64_ERROR) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) temp.resize(output_size); 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) output->swap(temp); 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 38