From af85d98a7e9fa5684bef7ec328d702e531ed6c48 Mon Sep 17 00:00:00 2001
From: adityag3 <adityagovil3@gmail.com>
Date: Mon, 22 Aug 2016 23:14:58 +0530
Subject: [PATCH 1/2] Adding script to perform CFB mode of encryption

---
 implementation.py | 33 +++++++++++++++++++++++++++++++++
 setup.py          |  2 +-
 2 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 implementation.py
 mode change 100644 => 100755 setup.py

diff --git a/implementation.py b/implementation.py
new file mode 100644
index 0000000..92216bf
--- /dev/null
+++ b/implementation.py
@@ -0,0 +1,33 @@
+import pyaes
+
+# A 256 bit (32 byte) key
+key = "123456789012345ef890123456789012"
+
+# For some modes of operation we need a random initialization vector
+# of 16 bytes
+iv = "9988776655443310"
+
+
+# Each block into the mode of operation must be a multiple of the segment
+# size. For this example we choose 8 bytes.
+aes = pyaes.AESModeOfOperationCFB(key, iv = iv, segment_size = 4)
+plaintext =  "1234567890123456"
+ciphertext = aes.encrypt(plaintext)
+
+# '''v\xa9\xc1w"\x8aL\x93\xcb\xdf\xa0/\xf8Y\x0b\x8d\x88i\xcb\x85rmp
+#    \x85\xfe\xafM\x0c)\xd5\xeb\xaf'''
+#print repr(ciphertext)
+
+
+# The cipher-block chaining mode of operation maintains state, so 
+# decryption requires a new instance be created
+aes = pyaes.AESModeOfOperationCFB(key, iv = iv, segment_size = 4)
+decrypted = aes.decrypt(ciphertext)
+#print decrypted
+# True
+#print decrypted == plaintext
+
+print "Unencrypted data: ", plaintext
+print "Encrypted data  : ", ciphertext
+print "Decrypted data  : ", decrypted
+print "Enc == Dec      : ", decrypted == plaintext
diff --git a/setup.py b/setup.py
old mode 100644
new mode 100755
index 884701d..f2d5235
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python
 
 from distutils.core import setup
 

From 3f2bc626874b0186317c2e6e6106c738baf4eb93 Mon Sep 17 00:00:00 2001
From: adityag3 <adityagovil3@gmail.com>
Date: Mon, 31 Oct 2016 16:07:10 +0530
Subject: [PATCH 2/2] demo code file added

---
 implementation.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/implementation.py b/implementation.py
index 92216bf..b7dce2d 100644
--- a/implementation.py
+++ b/implementation.py
@@ -1,4 +1,5 @@
 import pyaes
+from time import time
 
 # A 256 bit (32 byte) key
 key = "123456789012345ef890123456789012"
@@ -10,23 +11,29 @@
 
 # Each block into the mode of operation must be a multiple of the segment
 # size. For this example we choose 8 bytes.
+s = time()
 aes = pyaes.AESModeOfOperationCFB(key, iv = iv, segment_size = 4)
-plaintext =  "1234567890123456"
+plaintext =  "baf9dffc8b690539"
 ciphertext = aes.encrypt(plaintext)
 
 # '''v\xa9\xc1w"\x8aL\x93\xcb\xdf\xa0/\xf8Y\x0b\x8d\x88i\xcb\x85rmp
 #    \x85\xfe\xafM\x0c)\xd5\xeb\xaf'''
 #print repr(ciphertext)
 
-
+p = time()
+m = time() - s
+print m
 # The cipher-block chaining mode of operation maintains state, so 
 # decryption requires a new instance be created
 aes = pyaes.AESModeOfOperationCFB(key, iv = iv, segment_size = 4)
 decrypted = aes.decrypt(ciphertext)
+
+print time() - p
 #print decrypted
 # True
 #print decrypted == plaintext
 
+print "CFB Mode"
 print "Unencrypted data: ", plaintext
 print "Encrypted data  : ", ciphertext
 print "Decrypted data  : ", decrypted