string SolitaireCrypto::decrypt() {
if (keystream.length() != ciphertext.length()) {
cleartext.assign("");
return "";
}
string output("");
char keywork;
char cipherwork;
char outwork;
for(unsigned int i=0; i<keystream.length(); i++) {
keywork=charCodeAt(keystream[i]);
keywork=(keywork-64)%26;
cipherwork=charCodeAt(ciphertext[i]);
cipherwork=(cipherwork-64)%26;
outwork=(cipherwork-keywork)%26;
if(outwork<0) {outwork=26+outwork;}
outwork=outwork+64;
if(outwork==64) {outwork=90;}
output += fromCharCode(outwork);
}
cleartext.assign(output);
return output;
}
string SolitaireCrypto::encrypt() {
if (keystream.length() != cleartext.length()) {
ciphertext.assign("");
return "";
}
string output("");
char keywork;
char clearwork;
char outwork;
for(unsigned int i=0; i<keystream.length(); i++) {
keywork=charCodeAt(keystream[i]);
keywork=(keywork-64)%26;
clearwork=charCodeAt(cleartext[i]);
if(clearwork>=65&&clearwork<=90) {clearwork=(clearwork-64)%26;}
if(clearwork>=97&&clearwork<=122) {clearwork=(clearwork-96)%26;}
outwork=(clearwork+keywork)%26;
outwork=outwork+64;
if(outwork==64) {outwork=90;}
output += fromCharCode(outwork);
}
ciphertext.assign(output);
return output;
}
CompletionType evaluate()
{
Register<Value> value;
switch (method)
{
case FromCharCode:
value = fromCharCode();
break;
}
return CompletionType(CompletionType::Return, value, "");
}
void SolitaireCrypto::keygen(unsigned int msgLen) {
keystream.assign("");
for(unsigned int k=0; k< msgLen; k++) {
solitaire();
if(output()<53) {
keystream += fromCharCode(((output()-1)%26)+65);
}
if(output()>=53) {
k--;
}
}
}
