From 586206d4407b14b7c2844d7c4dd5d63bc8bc6d1b Mon Sep 17 00:00:00 2001
From: Pat Wick <pjwick@buffalo.edu>
Date: Thu, 25 Apr 2024 21:54:11 -0400
Subject: [PATCH] completed encryption lab

completed numerify, encrypt, decrypt, and wordify functions, in
addition to an additional decryption method that attempts to crack
the caesarian cipher when missing the shift number.
---
 ccipher.py | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 61 insertions(+), 1 deletion(-)

diff --git a/ccipher.py b/ccipher.py
index 4434c1c..4843c36 100644
--- a/ccipher.py
+++ b/ccipher.py
@@ -16,4 +16,64 @@ hex_lst=[]
 for item in encoded_lst:
     hex_lst.append(list(item)[0])
 print("The hex values associated with those bytes is:")
-print(hex_lst)
\ No newline at end of file
+print(hex_lst)
+
+def numerify(message):
+    """Converts the characters in a String to their hex values, returns a list of hex values.
+    """
+    letterBytes = [item.encode() for item in message]
+    hexResult = [list(letterByte)[0] for letterByte in letterBytes]
+    return hexResult
+
+def encrypt(numeric_message):
+    secretNumber = 1
+    newMessage = []
+    for value in numeric_message:
+        newMessage.append((value + secretNumber) % 256)
+    return newMessage
+
+def decrypt(encrypted_message):
+    secretNumber = 78
+    newMessage = []
+    for value in encrypted_message:
+        newMessage.append((value + (256 - secretNumber)) % 256)
+    return newMessage
+
+def wordify(decrypted_message):
+    message = [chr(item) for item in decrypted_message]
+    finalMessage = ''.join(message)
+    return finalMessage
+
+import statistics
+def decrypt_unknown(encrypted_message):
+    """Makes the assumption that the space character is going to be the most common character in the message. This obviously wouldn't work with a shorter message consisting of just a word or even handful of words, where I would swap my strategy to something like the letter "e" instead.
+    """
+    space = statistics.mode(encrypted_message)
+    cipher = space - 32
+    newMessage = []
+    for value in encrypted_message:
+        newMessage.append((value + (256 - cipher)) % 256)
+    return newMessage
+
+file1 = open("xfile.txt", "r")
+file2 = open("personal_poetry.txt", "r")
+file3 = open("answers19.txt", "r")
+
+def parseFile(file):
+    data = file.read()
+    #print(data)
+    data = data.split(', ')
+    #print(data)
+    data[0] = data[0][1:]
+    data[len(data)-1] = data[len(data)-1][:-1]
+    #print(data)
+    newData = []
+    for datum in data:
+        newData.append(int(datum))
+    #print(newData)
+    return newData
+
+message = parseFile(file3)
+print(wordify(decrypt_unknown(message)))
+
+#print(wordify(decrypt(encrypt(numerify('abc')))))
\ No newline at end of file