A lightweight AES implementation with Cipher Block Chaining and Ciphertext Stealing.

Dependents:   AES_HelloWorld AES_ExtendedTests AESslave_modified_test AESslave_modified_test_27-9-2017 ... more

Files at this revision

API Documentation at this revision

Comitter:
neilt6
Date:
Thu Sep 15 15:34:59 2016 +0000
Parent:
0:6132f54fa9e9
Commit message:
Fixed compiler error and improved readability

Changed in this revision

AES.cpp Show annotated file Show diff for this revision Revisions of this file
AES.h Show annotated file Show diff for this revision Revisions of this file
--- a/AES.cpp	Fri Sep 04 02:03:00 2015 +0000
+++ b/AES.cpp	Thu Sep 15 15:34:59 2016 +0000
@@ -1,5 +1,5 @@
 /* AES Cipher Library
- * Copyright (c) 2015 Neil Thiessen
+ * Copyright (c) 2016 Neil Thiessen
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -161,8 +161,9 @@
         //Perform CBC pre-processing if necessary
         if (m_CipherMode == MODE_CBC) {
             //XOR the state array with the carry vector
-            for (int i = 0; i < 16; i++)
+            for (int i = 0; i < 16; i++) {
                 m_State[i] = m_State[i] ^ m_CarryVector[i];
+            }
         }
 
         //Encrypt the state array
@@ -189,8 +190,9 @@
         //Perform CBC pre-processing if necessary
         if (m_CipherMode == MODE_CBC) {
             //XOR the state array with the carry vector
-            for (int i = 0; i < 16; i++)
+            for (int i = 0; i < 16; i++) {
                 m_State[i] = m_State[i] ^ m_CarryVector[i];
+            }
         }
 
         //Encrypt the state array
@@ -205,7 +207,7 @@
         //Perform ciphertext stealing if the next block is a partial block
         if (length > 0 && length < 16) {
             //Copy the last partial source block to a temporary buffer (in case of in-place encryption)
-            char temp[length];
+            char temp[16];
             memcpy(temp, srcBytes, length);
 
             //Copy the leading bytes of the state array to the last partial destination block
@@ -220,8 +222,9 @@
                 memset(m_State + length, 0, 16 - length);
 
                 //XOR the state array with the carry vector
-                for (int i = 0; i < 16; i++)
+                for (int i = 0; i < 16; i++) {
                     m_State[i] = m_State[i] ^ m_CarryVector[i];
+                }
             }
 
             //Encrypt the state array
@@ -257,8 +260,9 @@
         //Perform CBC processing if necessary
         if (m_CipherMode == MODE_CBC) {
             //XOR the state array with the carry vector
-            for (int i = 0; i < 16; i++)
+            for (int i = 0; i < 16; i++) {
                 m_State[i] = m_State[i] ^ m_CarryVector[i];
+            }
 
             //Save the source block as the next carry vector
             memcpy(m_CarryVector, src, 16);
@@ -284,12 +288,13 @@
             //Perform CBC processing if necessary
             if (m_CipherMode == MODE_CBC) {
                 //XOR the state array with the last partial source block
-                for (int i = 0; i < length; i++)
+                for (int i = 0; i < length; i++) {
                     m_State[i] = m_State[i] ^ src[i];
+                }
             }
 
             //Copy the last partial source block to a temporary buffer (in case of in-place decryption)
-            char temp[length];
+            char temp[16];
             memcpy(temp, src, length);
 
             //Copy the leading bytes of the state array to the last partial destination block
@@ -306,8 +311,9 @@
         //Perform CBC processing if necessary
         if (m_CipherMode == MODE_CBC) {
             //XOR the state array with the carry vector
-            for (int i = 0; i < 16; i++)
+            for (int i = 0; i < 16; i++) {
                 m_State[i] = m_State[i] ^ m_CarryVector[i];
+            }
 
             //Save the source block as the next carry vector
             memcpy(m_CarryVector, src - 16, 16);
--- a/AES.h	Fri Sep 04 02:03:00 2015 +0000
+++ b/AES.h	Thu Sep 15 15:34:59 2016 +0000
@@ -1,5 +1,5 @@
 /* AES Cipher Library
- * Copyright (c) 2015 Neil Thiessen
+ * Copyright (c) 2016 Neil Thiessen
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.