cryptography

cryptography.py

@@ -1,12 +1,61 @@
-"""
-cryptography.py
-Author: <your name here>
-Credit: <list sources used, if any>
 
-Assignment:
+associations = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 .,:;'\"/\\<>(){}[]-=_+?!"
 
-Write and submit a program that encrypts and decrypts user data.
+question = input("Enter e to encrypt, d to decrypt, or q to quit: ")
 
-See the detailed requirements at https://github.com/HHS-IntroProgramming/Cryptography/blob/master/README.md
-"""
-associations = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 .,:;'\"/\\<>(){}[]-=_+?!"
+messagenmbrs = []
+keynmbrs = []
+bothnmbrs = []
+ecommand = []
+bothdifference = []
+dcommand = []
+
+
+if question == 'e':
+
+    message = input("Message: ")
+    key = input("Key: ")
+    message = list(message)
+    key = list(key)
+
+    for x in message:
+        messagenmbrs.append(associations.find(x))
+    for y in key:
+        keynmbrs.append(associations.find(y))
+    for z in range(0, len(messagenmbrs)):
+        bothnmbrs.append(messagenmbrs[z] + keynmbrs[z%len(keynmbrs)])
+    for a in bothnmbrs:
+        ecommand.append(associations[a%85])
+
+    print(''.join(ecommand))
+
+    messagenmbrs = []
+    keynmbrs = []
+    bothnmbrs = []
+    ecommand = []
+
+elif question == 'd':
+
+    emessage = input("Message: ")
+    key = input("Key: ")
+
+    for x in emessage:
+        messagenmbrs.append(associations.find(x))
+    for y in key:
+        keynmbrs.append(associations.find(y))
+    for z in range(0, len(messagenmbrs)):
+        bothnmbrs.append(messagenmbrs[z]-keynmbrs[z%len(keynmbrs)])
+    for a in bothnmbrs:
+        dcommand.append(associations[a%85])
+
+    print(''.join(dcommand))
+
+    messagenmbrs = []
+    keynmbrs = []
+    bothnmbrs = []
+    dcommand = []
+
+elif question == 'q':
+    print("Goodbye!")
+else:
+    print("Did not understand command, try again.")