public static string AnalyzeNoKey(string inStr)
{
var decryptList = new DecryptObjList();
// Try the Caesar Ciphers
for (var i = 1; i < 26; i++)
{
var decryptStr = CaesarTools.RotNDecrypt(i, inStr);
var count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
var keyStr = "ROT-" + i;
DecryptObjList.AddObj(new DecryptObj(keyStr, count, decryptStr));
}
}
// Now try the Rail Fence Ciphers
for (var i = 3; i < 7; i++)
{
var decryptStr = RailFence.RailFenceDecrypt(inStr, i);
var count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
var keyStr = "Rail Fence-" + i;
DecryptObjList.AddObj(new DecryptObj(keyStr, count, decryptStr));
}
}
return(decryptList.BuildList());
}
public static string AnalyzeKeyGuess(string inStr, string keyGuess)
{
var outStr = new StringBuilder();
var count = 0;
var decryptList = new DecryptObjList();
// Try Vigenere
var decryptStr = Vigenere.VigenereDecode(inStr, keyGuess);
count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
DecryptObjList.AddObj(new DecryptObj("Vigenere", count, decryptStr));
}
// Try Fractionated Morse
decryptStr = Morse.FracMorseCodeDecrypt(inStr, keyGuess);
count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
DecryptObjList.AddObj(new DecryptObj("Fractionated Morse", count, decryptStr));
}
// Try Keyword
decryptStr = Miscellaneous.KeywordCipherDecode(inStr, keyGuess, "");
count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
DecryptObjList.AddObj(new DecryptObj("Keyword", count, decryptStr));
}
// Try Playfair
decryptStr = Playfair.PlayfairDecrypt(inStr, keyGuess);
count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
DecryptObjList.AddObj(new DecryptObj("Playfair", count, decryptStr));
}
return(decryptList.BuildList());
}
public static string FracMorseKeyBruteForce(string inStr)
{
var outStr = new StringBuilder();
var keyStr = new StringBuilder();
var count = 0;
var decryptList = new DecryptObjList();
// 1 letter keys
for (var i1 = 0; i1 < 26; i1++)
{
keyStr.Length = 0;
keyStr.Append((char)('a' + i1));
var decryptStr = Morse.FracMorseCodeDecrypt(inStr, keyStr.ToString());
count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
DecryptObjList.AddObj(new DecryptObj(keyStr.ToString(), count, decryptStr));
}
}
// 2 letter keys
for (var i1 = 0; i1 < 26; i1++)
{
for (var i2 = 0; i2 < 26; i2++)
{
keyStr.Length = 0;
keyStr.AppendFormat("{0}{1}", (char)('a' + i1), (char)('a' + i2));
var decryptStr = Morse.FracMorseCodeDecrypt(inStr, keyStr.ToString());
count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
DecryptObjList.AddObj(new DecryptObj(keyStr.ToString(), count, decryptStr));
}
}
}
// 3 letter keys
for (var i1 = 0; i1 < 26; i1++)
{
for (var i2 = 0; i2 < 26; i2++)
{
for (var i3 = 3; i3 < 26; i3++)
{
keyStr.Length = 0;
keyStr.AppendFormat("{0}{1}{2}", (char)('a' + i1), (char)('a' + i2), (char)('a' + i3));
var decryptStr = Morse.FracMorseCodeDecrypt(inStr, keyStr.ToString());
count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
DecryptObjList.AddObj(new DecryptObj(keyStr.ToString(), count, decryptStr));
}
}
}
}
// 4 letter keys
for (var i1 = 0; i1 < 26; i1++)
{
for (var i2 = 0; i2 < 26; i2++)
{
for (var i3 = 0; i3 < 26; i3++)
{
for (var i4 = 0; i4 < 26; i4++)
{
keyStr.Length = 0;
keyStr.AppendFormat("{0}{1}{2}{3}", (char)('a' + i1), (char)('a' + i2), (char)('a' + i3),
(char)('a' + i4));
var decryptStr = Morse.FracMorseCodeDecrypt(inStr, keyStr.ToString());
count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
DecryptObjList.AddObj(new DecryptObj(keyStr.ToString(), count, decryptStr));
}
}
}
}
}
if (FullRun)
{
// 5 letter keys
for (var i1 = 0; i1 < 26; i1++)
{
for (var i2 = 0; i2 < 26; i2++)
{
for (var i3 = 0; i3 < 26; i3++)
{
for (var i4 = 0; i4 < 26; i4++)
{
for (var i5 = 0; i5 < 26; i5++)
{
keyStr.Length = 0;
keyStr.AppendFormat("{0}{1}{2}{3}{4}", (char)('a' + i1), (char)('a' + i2),
(char)('a' + i3), (char)('a' + i4), (char)('a' + i5));
var decryptStr = Morse.FracMorseCodeDecrypt(inStr, keyStr.ToString());
count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
DecryptObjList.AddObj(new DecryptObj(keyStr.ToString(), count, decryptStr));
}
}
}
}
}
}
// 6 letter keys - 5 letters and x
for (var i1 = 0; i1 < 26; i1++)
{
for (var i2 = 0; i2 < 26; i2++)
{
for (var i3 = 0; i3 < 26; i3++)
{
for (var i4 = 0; i4 < 26; i4++)
{
for (var i5 = 0; i5 < 26; i5++)
{
keyStr.Length = 0;
keyStr.AppendFormat("{0}{1}{2}{3}{4}x", (char)('a' + i1), (char)('a' + i2),
(char)('a' + i3), (char)('a' + i4), (char)('a' + i5));
var decryptStr = Morse.FracMorseCodeDecrypt(inStr, keyStr.ToString());
count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
DecryptObjList.AddObj(new DecryptObj(keyStr.ToString(), count, decryptStr));
}
}
}
}
}
}
// 7 letter keys - 5 letters and xx
for (var i1 = 0; i1 < 26; i1++)
{
for (var i2 = 0; i2 < 26; i2++)
{
for (var i3 = 0; i3 < 26; i3++)
{
for (var i4 = 0; i4 < 26; i4++)
{
for (var i5 = 0; i5 < 26; i5++)
{
keyStr.Length = 0;
keyStr.AppendFormat("{0}{1}{2}{3}{4}xx", (char)('a' + i1), (char)('a' + i2),
(char)('a' + i3), (char)('a' + i4), (char)('a' + i5));
var decryptStr = Morse.FracMorseCodeDecrypt(inStr, keyStr.ToString());
count = NumberOfLibraryMatches(decryptStr);
if (count >= PositiveMatchCount)
{
DecryptObjList.AddObj(new DecryptObj(keyStr.ToString(), count, decryptStr));
}
}
}
}
}
}
}
return(decryptList.BuildList());
}
