| 54 | } |
| 55 | |
| 56 | std::string base64_decode(std::string const& encoded_string) |
| 57 | { |
| 58 | int in_len = encoded_string.size(); |
| 59 | int i = 0; |
| 60 | int j = 0; |
| 61 | int in_ = 0; |
| 62 | unsigned char char_array_4[4], char_array_3[3]; |
| 63 | std::string ret; |
| 64 | |
| 65 | while (in_len-- && (encoded_string[in_] != '=') && is_base64(encoded_string[in_])) { |
| 66 | char_array_4[i++] = encoded_string[in_]; in_++; |
| 67 | if (i == 4) { |
| 68 | for (i = 0; i < 4; i++) |
| 69 | char_array_4[i] = base64_chars.find(char_array_4[i]); |
| 70 | |
| 71 | char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4); |
| 72 | char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2); |
| 73 | char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3]; |
| 74 | |
| 75 | for (i = 0; (i < 3); i++) |
| 76 | ret += char_array_3[i]; |
| 77 | i = 0; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | if (i) { |
| 82 | for (j = i; j < 4; j++) |
| 83 | char_array_4[j] = 0; |
| 84 | |
| 85 | for (j = 0; j < 4; j++) |
| 86 | char_array_4[j] = base64_chars.find(char_array_4[j]); |
| 87 | |
| 88 | char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4); |
| 89 | char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2); |
| 90 | char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3]; |
| 91 | |
| 92 | for (j = 0; (j < i - 1); j++) ret += char_array_3[j]; |
| 93 | } |
| 94 | |
| 95 | return ret; |
| 96 | } |
no test coverage detected