| 74 | } |
| 75 | |
| 76 | static std::vector<uint8_t> base64_decode(std::string const &encoded_string) |
| 77 | { |
| 78 | int i = 0; |
| 79 | int j = 0; |
| 80 | int in_ = 0; |
| 81 | |
| 82 | int in_len = encoded_string.size(); |
| 83 | |
| 84 | uint8_t char_array_4[4]; |
| 85 | uint8_t char_array_3[3]; |
| 86 | |
| 87 | std::vector<uint8_t> ret; |
| 88 | |
| 89 | while (in_len-- && (encoded_string[in_] != '=') && is_base64(encoded_string[in_])) |
| 90 | { |
| 91 | char_array_4[i++] = encoded_string[in_]; in_++; |
| 92 | if (i == 4) |
| 93 | { |
| 94 | for (i = 0; i <4; i++) |
| 95 | { |
| 96 | char_array_4[i] = base64_chars.find(char_array_4[i]); |
| 97 | } |
| 98 | |
| 99 | char_array_3[0] = ((char_array_4[0] ) << 2) + ((char_array_4[1] & 0x30) >> 4); |
| 100 | char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2); |
| 101 | char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3]; |
| 102 | |
| 103 | for (i = 0; (i < 3); i++) |
| 104 | { |
| 105 | ret.push_back(char_array_3[i]); |
| 106 | } |
| 107 | i = 0; |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | if (i) |
| 112 | { |
| 113 | for (j = i; j <4; j++) |
| 114 | { |
| 115 | char_array_4[j] = 0; |
| 116 | } |
| 117 | |
| 118 | for (j = 0; j <4; j++) |
| 119 | { |
| 120 | char_array_4[j] = base64_chars.find(char_array_4[j]); |
| 121 | } |
| 122 | |
| 123 | char_array_3[0] = ((char_array_4[0] ) << 2) + ((char_array_4[1] & 0x30) >> 4); |
| 124 | char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2); |
| 125 | char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3]; |
| 126 | |
| 127 | for (j = 0; (j < i - 1); j++) |
| 128 | { |
| 129 | ret.push_back(char_array_3[j]); |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | return ret; |
no test coverage detected