string Converter::xorHexAgainstHex(string input) {
generateHex();
vector<uint8_t> xorElement = generateHex(input);
uint32_t length = _hex.size();
if (length != xorElement.size()) {
return string("Sizes of HexElements must match");
}
string payload;
for (uint32_t i = 0; i < length; i++) {
uint8_t item = _hex[i] ^xorElement[i];
payload.push_back(hex_chars[item]);
}
return payload;
}
int main ( int argc, char *argv[] )
{
if ( argc != 2 ) {/* argc should be 2 for correct execution */
printf( "usage: %s [up to 31 character string]", argv[0] );
exit(EXIT_FAILURE);
}
int end = 0;
char inputText[64];
char* lowerString = inputText;
char* upperString = NULL;
//Extract up to 31 characters.
strncpy(inputText,argv[1],31);
inputText[31] = 0; //null terminate
//Work out the length of the string
unsigned int length = strlen(inputText);
unsigned int upperLength = 0;
unsigned int i;
for(i = length+1; i < 64; i++){
inputText[i] = 0xFF; //pad the page with 0xFF.
}
//Check if we need to split into two lines
/*if (length > 15) {
upperString = &inputText[16];
upperLength = length - 15;
length = length - upperLength;
}
length++;*/
length = 16;
upperLength = 16;
upperString = &inputText[16];
//Generate the lower hex string
char intelHexString[44];
generateHex(intelHexString,lowerString,length,0x1F00);
printf("%s\n",intelHexString);
if (upperString != NULL){
generateHex(intelHexString,upperString,upperLength,0x1F10);
printf("%s\n",intelHexString);
}
generateHex(intelHexString,&inputText[32],16,0x1F20);
printf("%s\n",intelHexString);
generateHex(intelHexString,&inputText[48],16,0x1F30);
printf("%s\n",intelHexString);
printf(":00000001FF\n");
exit(0);
}
string Converter::getHex() {
if (!_hexGenerated) {
_hex = generateHex(_input);
_hexGenerated = true;
}
string payload;
for (uint8_t u: _hex) {
payload.push_back(hex_chars[u]);
}
return payload;
}
string Converter::hexToStringWithXor(uint8_t xorInput) {
generateHex();
string payload;
uint32_t length = _hex.size();
for (int i = 0; i < length;) {
uint8_t item = _hex[i++] << 4;
if (i < length) {
item |= _hex[i++];
}
payload.push_back(item ^ xorInput);
}
return payload;
}
void Converter::generateHex() {
if (!_hexGenerated) {
_hex = generateHex(_input);
_hexGenerated = true;
}
}
