| 10 | static const std::string B64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
| 11 | |
| 12 | std::string b64encode(const std::string& in) { |
| 13 | std::string out; |
| 14 | int val = 0, valb = -6; |
| 15 | for (unsigned char c : in) { |
| 16 | val = (val << 8) + c; |
| 17 | valb += 8; |
| 18 | while (valb >= 0) { |
| 19 | out += B64[(val >> valb) & 0x3F]; |
| 20 | valb -= 6; |
| 21 | } |
| 22 | } |
| 23 | if (valb > -6) out += B64[((val << 8) >> (valb + 8)) & 0x3F]; |
| 24 | while (out.size() % 4) out += '='; |
| 25 | return out; |
| 26 | } |
| 27 | |
| 28 | std::string b64decode(const std::string& in) { |
| 29 | std::string out; |