public string encryptString(string input)
{
StringBuilder sb = new StringBuilder();
char[] plain = input.Trim().ToUpper().ToCharArray();
foreach (char c in plain)
{
if (!Char.IsWhiteSpace(c))
{
if (!Char.IsLetter(c))
{
Console.WriteLine("INVALID INPUT");
}
//Following WW2 Convention, rotors are specified Left-Mid-Right
//But the actual encrypt/decrypt happens from Right->Mid->Left
//result holds the intermediary values as well as the final output
char result;
/* ***********************
* PLUGBOARD TRANSLATION
* ***********************/
result = plugboard.translate(c);
/* ***********************
* ROTOR PROCESSING
* ***********************/
//TICK BEFORE ENCRYPT
tick();
// variables we will keep using during rotor stages
int offsetRotInternalAboveSea; //always > 0, expressed in mod26
int inputValueRotorInternal; //always > 0, expressed in mod26
foreach (int rot in new int[] { RIGHT, MID, LEFT })
{
offsetRotInternalAboveSea = Utility.GetOffsetRotorInternal(ringSetting, windowSetting, rot);
inputValueRotorInternal = ((result - 'A') - offsetRotInternalAboveSea + 26) % 26;
char currentRot_internalInput = (char)('A' + inputValueRotorInternal);
char currentRot_internalOutput = rotors[rot].process(currentRot_internalInput);
char currentRot_sealevelOutput = (char)('A' +
((currentRot_internalOutput - 'A') + offsetRotInternalAboveSea) % 26);
result = currentRot_sealevelOutput;
}
/* ***********************
* REFLECTOR PROCESSING
* ***********************/
result = reflector.reflect(result);
/* ***********************
* ROTOR IN REVERSE
* ***********************/
foreach (int rot in new int[] { LEFT, MID, RIGHT })
{
offsetRotInternalAboveSea = Utility.GetOffsetRotorInternal(ringSetting, windowSetting, rot);
inputValueRotorInternal = ((result - 'A') - offsetRotInternalAboveSea + 26) % 26;
char currentRot_internalInput = (char)('A' + inputValueRotorInternal);
char currentRot_internalOutput = rotors[rot].revProcess(currentRot_internalInput);
char currentRot_sealevelOutput = (char)('A' +
((currentRot_internalOutput - 'A') + offsetRotInternalAboveSea) % 26);
result = currentRot_sealevelOutput;
}
/* ***********************
* PLUGBOARD TRANSLATION
* ***********************/
char final_out = plugboard.translate(result);
sb.Append(final_out);
}
}
return(sb.ToString());
}