| 266 | |
| 267 | |
| 268 | std::vector<uint8_t> Utils::base64_decode(std::string const& encoded_string) |
| 269 | { |
| 270 | const std::string base64_chars = |
| 271 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
| 272 | "abcdefghijklmnopqrstuvwxyz" |
| 273 | "0123456789+/"; |
| 274 | |
| 275 | std::string::size_type in_len = encoded_string.size(); |
| 276 | int i = 0; |
| 277 | int j = 0; |
| 278 | int in_ = 0; |
| 279 | unsigned char char_array_4[4], char_array_3[3]; |
| 280 | std::vector<uint8_t> ret; |
| 281 | |
| 282 | while (in_len-- && (encoded_string[in_] != '=') && is_base64(encoded_string[in_])) |
| 283 | { |
| 284 | char_array_4[i++] = encoded_string[in_]; |
| 285 | in_++; |
| 286 | if (i == 4) |
| 287 | { |
| 288 | for (i = 0; i <4; i++) |
| 289 | char_array_4[i] = static_cast<unsigned char>( |
| 290 | base64_chars.find(char_array_4[i])); |
| 291 | |
| 292 | char_array_3[0] = (char_array_4[0] << 2) + |
| 293 | ((char_array_4[1] & 0x30) >> 4); |
| 294 | char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + |
| 295 | ((char_array_4[2] & 0x3c) >> 2); |
| 296 | char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3]; |
| 297 | |
| 298 | for (i = 0; (i < 3); i++) |
| 299 | ret.push_back(char_array_3[i]); |
| 300 | i = 0; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | if (i) |
| 305 | { |
| 306 | for (j = i; j <4; j++) |
| 307 | char_array_4[j] = 0; |
| 308 | |
| 309 | for (j = 0; j <4; j++) |
| 310 | char_array_4[j] = static_cast<unsigned char>(base64_chars.find(char_array_4[j])); |
| 311 | |
| 312 | char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4); |
| 313 | char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2); |
| 314 | char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3]; |
| 315 | |
| 316 | for (j = 0; (j < i - 1); j++) |
| 317 | ret.push_back(char_array_3[j]); |
| 318 | } |
| 319 | return ret; |
| 320 | } |
| 321 | |
| 322 | |
| 323 | FILE* Utils::portable_popen(const std::string& command, const std::string& mode) |