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Author: InTruder-Sec

Caesar Cipher Encoder & Decoder.py

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+#PROJECT1
+#CAESAR CIPHER DECODER 
+
+#Author: InTruder
+#Cloned from: https://github.com/InTruder-Sec/caesar-cipher
+
+
+def main():
+    print("[>] CAESAR CIPHER DECODER!!! \n")
+    print("[1] Encrypt\n[2] Decrypt")
+    try:
+        func = int(input("Choose one of the above(example for encode enter 1): "))
+    except:
+        print("\n[>] Invalid input")
+        exit()
+
+    if func == 2:
+        decode()
+    else:
+        if func == 1:
+            encode()
+        else:
+            print("\n[>] Invalid input")
+        exit()
+
+def encode():
+    text = input("Enter text to encode: ")
+    key = input("Enter number of characters you want to shift: ")
+    encoded_cipher = ""
+    try:
+        key = int(key)
+    except:
+        print("Only intigers between 0 to 25 are allowed. Try again :)")
+        exit()
+    if key > 25:
+        print("Only intigers between 0 to 25 are allowed. Try again :)")
+        exit()
+    else:
+        key = key
+    text = text.upper()
+    for char in text:
+        ascii = ord(char)
+        if ascii > 90:
+            new_ascii = ascii
+        else:
+            if ascii < 65:
+                new_ascii = ascii
+            else:
+                new_ascii = ascii + key
+                if  new_ascii > 90:
+                    new_ascii = new_ascii - 26
+                else:
+                    new_ascii = new_ascii
+        encoded = chr(new_ascii)
+        encoded_cipher = encoded_cipher + encoded
+    print("Encoded text: " + encoded_cipher)
+
+
+
+def decode():
+    cipher = input("\n[>] Enter your cipher text: ")
+    print("Posiblities of cipher text are: \n")
+    cipher = cipher.lower()
+    for i in range(1, 26):
+        decoded = ""
+        decoded_cipher = ""
+        for char in cipher:
+            ascii = ord(char)
+            if ascii < 97:
+                new_ascii = ascii
+            else:
+                if ascii > 122:
+                    new_ascii = ascii
+                else:
+                    new_ascii = ascii - int(i)
+                    if new_ascii < 97:
+                      new_ascii = new_ascii + 26
+                    else:
+                        new_ascii = new_ascii
+            decoded = chr(new_ascii)
+            decoded_cipher = decoded_cipher + decoded
+        print("\n" + decoded_cipher)
+
+
+if __name__ == '__main__':
+    main()