From aa4db0ae3b83b0d0c576e140d21b98562521b93c Mon Sep 17 00:00:00 2001
From: Sharanpai <sharan16266@iiitd.ac.in>
Date: Sat, 7 Oct 2017 02:59:20 +0530
Subject: [PATCH 1/2] Added a script that encryts or derypts a message, using
 the caesar cipher

---
 bin/caesar_cipher.py | 54 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 bin/caesar_cipher.py

diff --git a/bin/caesar_cipher.py b/bin/caesar_cipher.py
new file mode 100644
index 0000000..4a183a0
--- /dev/null
+++ b/bin/caesar_cipher.py
@@ -0,0 +1,54 @@
+key = 'abcdefghijklmnopqrstuvwxyz'
+
+def encrypt(n, plaintext):
+    """Encrypt the string and return the ciphertext"""
+    result = ''
+
+    for l in plaintext.lower():
+        try:
+            i = (key.index(l) + n) % 26
+            result += key[i]
+        except ValueError:
+            result += l
+
+    return result.lower()
+
+
+def decrypt(n, ciphertext):
+    """Decrypt the string and return the plaintext"""
+    result = ''
+
+    for l in ciphertext:
+        try:
+            i = (key.index(l) - n) % 26
+            result += key[i]
+        except ValueError:
+            result += l
+
+    return result
+
+
+def show_result(plaintext, n):
+    """Generate a resulting cipher with elements shown"""
+    encrypted = encrypt(n, plaintext)
+    decrypted = decrypt(n, encrypted)
+
+    print ('Rotation: %s' % n)
+    print ('Plaintext: %s' % plaintext)
+    print ('Encrytped: %s' % encrypted)
+    print ('Decrytped: %s' % decrypted)
+print("Encrypt or decrypt?")
+ans = input()
+ans = ans.lower()
+print("Enter message")
+k = input()
+print("Enter rotation number")
+nn = int(input())
+if ans == 'encrypt':
+    ret = encrypt(nn,k)
+    print ('Encrytped: %s' % ret)
+else:
+    ret = decrypt(nn,k)
+    print ('Decrytped: %s' % ret)
+
+#show_result(k,int(nn))
\ No newline at end of file

From c73395c3a87e850e281e48bc2ecd2806a3e6e89d Mon Sep 17 00:00:00 2001
From: Sharan Pai <sharan16266@iiitd.ac.in>
Date: Sat, 7 Oct 2017 03:16:22 +0530
Subject: [PATCH 2/2] Update caesar_cipher.py

---
 bin/caesar_cipher.py | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/bin/caesar_cipher.py b/bin/caesar_cipher.py
index 4a183a0..df9fc40 100644
--- a/bin/caesar_cipher.py
+++ b/bin/caesar_cipher.py
@@ -27,16 +27,6 @@ def decrypt(n, ciphertext):
 
     return result
 
-
-def show_result(plaintext, n):
-    """Generate a resulting cipher with elements shown"""
-    encrypted = encrypt(n, plaintext)
-    decrypted = decrypt(n, encrypted)
-
-    print ('Rotation: %s' % n)
-    print ('Plaintext: %s' % plaintext)
-    print ('Encrytped: %s' % encrypted)
-    print ('Decrytped: %s' % decrypted)
 print("Encrypt or decrypt?")
 ans = input()
 ans = ans.lower()
@@ -50,5 +40,3 @@ def show_result(plaintext, n):
 else:
     ret = decrypt(nn,k)
     print ('Decrytped: %s' % ret)
-
-#show_result(k,int(nn))
\ No newline at end of file