| #include "yaml-cpp/binary.h" |
| |
| namespace YAML { |
| static const char encoding[] = |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
| |
| std::string EncodeBase64(const unsigned char *data, std::size_t size) { |
| const char PAD = '='; |
| |
| std::string ret; |
| ret.resize(4 * size / 3 + 3); |
| char *out = &ret[0]; |
| |
| std::size_t chunks = size / 3; |
| std::size_t remainder = size % 3; |
| |
| for (std::size_t i = 0; i < chunks; i++, data += 3) { |
| *out++ = encoding[data[0] >> 2]; |
| *out++ = encoding[((data[0] & 0x3) << 4) | (data[1] >> 4)]; |
| *out++ = encoding[((data[1] & 0xf) << 2) | (data[2] >> 6)]; |
| *out++ = encoding[data[2] & 0x3f]; |
| } |
| |
| switch (remainder) { |
| case 0: |
| break; |
| case 1: |
| *out++ = encoding[data[0] >> 2]; |
| *out++ = encoding[((data[0] & 0x3) << 4)]; |
| *out++ = PAD; |
| *out++ = PAD; |
| break; |
| case 2: |
| *out++ = encoding[data[0] >> 2]; |
| *out++ = encoding[((data[0] & 0x3) << 4) | (data[1] >> 4)]; |
| *out++ = encoding[((data[1] & 0xf) << 2)]; |
| *out++ = PAD; |
| break; |
| } |
| |
| ret.resize(out - &ret[0]); |
| return ret; |
| } |
| |
| static const unsigned char decoding[] = { |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 255, |
| 255, 255, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, |
| 255, 0, 255, 255, 255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, |
| 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, |
| 25, 255, 255, 255, 255, 255, 255, 26, 27, 28, 29, 30, 31, 32, 33, |
| 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, |
| 49, 50, 51, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, |
| }; |
| |
| std::vector<unsigned char> DecodeBase64(const std::string &input) { |
| typedef std::vector<unsigned char> ret_type; |
| if (input.empty()) |
| return ret_type(); |
| |
| ret_type ret(3 * input.size() / 4 + 1); |
| unsigned char *out = &ret[0]; |
| |
| unsigned value = 0; |
| for (std::size_t i = 0; i < input.size(); i++) { |
| unsigned char d = decoding[static_cast<unsigned>(input[i])]; |
| if (d == 255) |
| return ret_type(); |
| |
| value = (value << 6) | d; |
| if (i % 4 == 3) { |
| *out++ = value >> 16; |
| if (i > 0 && input[i - 1] != '=') |
| *out++ = value >> 8; |
| if (input[i] != '=') |
| *out++ = value; |
| } |
| } |
| |
| ret.resize(out - &ret[0]); |
| return ret; |
| } |
| } |