/*
* Get a string as an input and returns a plain string
*/
std::string base64_decrypt(std::string input)
{
std::map<char, int> mapping;
char byte1, byte2, byte3;
int mapped;
int32_t binary_datum {0};
std::string retval;
mapping = build_reverse_map();
for(int i = 0; i < input.size(); i += 4){
std::string datum {input.substr(i, 4)};
binary_datum = 0;
for(char c : datum){
mapped = mapping[c];
binary_datum |= mapped;
binary_datum <<= 6;
}
binary_datum >>= 6;
byte1 = (binary_datum % 256);
binary_datum >>= 8;
byte2 = (binary_datum % 256);
binary_datum >>= 8;
byte3 = (binary_datum % 256);
retval += byte3;
retval += byte2;
retval += byte1;
}
return retval;
}
void Ioss::Map::build_reverse_map(int processor)
{
if (map[0] == 1) {
build_reverse_map(map.size()-1, 0, processor);
}
}
void Ioss::Map::build_reverse_map()
{
if (map[0] == 1) {
build_reverse_map(map.size()-1, 0);
}
}
