Geremia G / Mbed 2 deprecated AES_example

Example of using AES with ECB/CBC/PCBC modes

Dependencies:   Crypto mbed

Files at this revision

API Documentation at this revision

Revision 0:da8611a6d1bb, committed 2015-01-28

Comitter:
Geremia
Date:
Wed Jan 28 18:00:28 2015 +0000
Commit message:
Example

Changed in this revision

Crypto.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Crypto.lib	Wed Jan 28 18:00:28 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/Geremia/code/Crypto/#4399e2e6260b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jan 28 18:00:28 2015 +0000
@@ -0,0 +1,70 @@
+#include "mbed.h"
+#include "Crypto.h"
+
+Serial pc(USBTX, USBRX);
+unsigned char myKEY[16] = {0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,};
+unsigned char myIV[16] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, } ;
+unsigned char msg[0x60] =
+{
+    0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 
+    0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
+    0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 
+    0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
+} ;
+int main()
+{
+    pc.baud (115200);
+    pc.printf("\r\nCleartext");
+    for(char i=0; i<0x60; i++) 
+    {
+        if(i%16==0) pc.printf("\r\n");
+        pc.printf("%.2X",msg[i]);
+    }
+    
+    // init crypto
+    //AES myAES(AES_128, myKEY); // will default to ECB_MODE
+    //AES myAES(AES_128, myKEY, myIV); // will default to CBC_MODE
+    AES myAES(AES_128, myKEY, myIV, PCBC_MODE); // specify all params, look at BlockCipher.h for modes
+    pc.printf("\r\n\r\nFirst run\r\n");
+    myAES.encrypt(msg,msg,0x60); // same in and out buffer can be used
+    pc.printf("\r\nEncrypted");
+    for(char i=0; i<0x60; i++) 
+    {
+        if(i%16==0) pc.printf("\r\n");
+        pc.printf("%.2X",msg[i]);
+    }
+    pc.printf("\r\nDecrypted again");
+    myAES.decrypt(msg,msg,0x60);
+    for(char i=0; i<0x60; i++) 
+    {
+        if(i%16==0) pc.printf("\r\n");
+        pc.printf("%.2X",msg[i]);
+    }
+    // change key and IV without reinit all
+    unsigned char newKey[16];
+    unsigned char newIV[16];
+    memset(newKey, 0x22, 16);
+    memset(newIV, 0x33, 16);
+    myAES.keyExpansion(newKey);
+    myAES.setIV(newIV);
+    pc.printf("\r\n\r\nKey and IV changed\r\n");
+    unsigned char plaintext[0x60];
+    unsigned char ciphertext[0x60];
+    myAES.encrypt(ciphertext,msg,0x60); // different buffers if you have space
+    pc.printf("\r\nEncrypted");
+    for(char i=0; i<0x60; i++) 
+    {
+        if(i%16==0) pc.printf("\r\n");
+        pc.printf("%.2X",ciphertext[i]);
+    }
+    pc.printf("\r\nDecrypted again");
+    myAES.decrypt(plaintext,ciphertext,0x60); // different buffers if you have space
+    for(char i=0; i<0x60; i++) 
+    {
+        if(i%16==0) pc.printf("\r\n");
+        pc.printf("%.2X",plaintext[i]);
+    }
+
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Jan 28 18:00:28 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/9327015d4013
\ No newline at end of file