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Commit 837e380

Browse files
playfair added
1 parent 75cf1d5 commit 837e380

14 files changed

+15
-7
lines changed

‎SecurityLibrary/MainAlgorithms/PlayFair.cs

Lines changed: 14 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -126,26 +126,30 @@ public string Decrypt(string cipherText, string key)
126126
}
127127
}
128128

129+
130+
string ans = PT;
129131
if (PT[PT.Length - 1] == 'x')
130132
{
131-
PT = PT.Remove(PT.Length - 1);
133+
ans = ans.Remove(PT.Length - 1);
132134
}
133135

134-
for (int i = 0; i < PT.Length; i++)
136+
int w = 0;
137+
for (int i = 0; i < ans.Length; i++)
135138
{
136139
if (PT[i] == 'x')
137140
{
138141
if (PT[i - 1] == PT[i + 1])
139142
{
140-
if (i+1<PT.Length && (i+1)%2==0)
143+
if (i+w<ans.Length && (i-1)%2==0)
141144
{
142-
PT = PT.Remove(i, 1);
145+
ans = ans.Remove(i+w, 1);
146+
w--;
143147
}
144148
}
145149
}
146150
}
147151

148-
FPT += PT;
152+
FPT += ans;
149153
}
150154

151155
Console.WriteLine(FPT);
@@ -156,13 +160,13 @@ public string Decrypt(string cipherText, string key)
156160
public string Encrypt(string plainText, string key)
157161
{
158162
string CT = "";
163+
159164
KOMatrices KOkey = KOFunc(ModifiedKey(key));
160165
for (int i = 0; i < plainText.Length - 1; i+=2)
161166
{
162167
if (plainText[i] == plainText[i + 1])
163168
{
164-
i++;
165-
plainText = plainText.Substring(0, i) + 'x' + plainText.Substring(i);
169+
plainText = plainText.Substring(0, i+1) + 'x' + plainText.Substring(i+1);
166170
}
167171

168172
}
@@ -188,6 +192,9 @@ public string Encrypt(string plainText, string key)
188192
}
189193
}
190194

195+
196+
Console.WriteLine(CT.ToUpper());
197+
Console.WriteLine("\n\n");
191198
return CT.ToUpper();
192199
}
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‎SecurityPackage.v12.suo

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‎SecurityPackageTest/PlayfairTest.cs

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -91,6 +91,7 @@ public void PlayfairTestEnc4()
9191
{
9292
PlayFair algorithm = new PlayFair();
9393
string cipher = algorithm.Encrypt(largePlain, largeKey);
94+
Console.WriteLine(largeCipher);
9495
Assert.IsTrue(cipher.Equals(largeCipher, StringComparison.InvariantCultureIgnoreCase));
9596
}
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