Geremia G / Mbed 2 deprecated AES_example

Example of using AES with ECB/CBC/PCBC modes

Dependencies:   Crypto mbed

main.cpp@0:da8611a6d1bb, 2015-01-28 (annotated)

Committer:
Geremia
Date:
Wed Jan 28 18:00:28 2015 +0000
Revision:
0:da8611a6d1bb
Example

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Geremia 0:da8611a6d1bb 1 #include "mbed.h"
Geremia 0:da8611a6d1bb 2 #include "Crypto.h"
Geremia 0:da8611a6d1bb 3
Geremia 0:da8611a6d1bb 4 Serial pc(USBTX, USBRX);
Geremia 0:da8611a6d1bb 5 unsigned char myKEY[16] = {0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,};
Geremia 0:da8611a6d1bb 6 unsigned char myIV[16] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, } ;
Geremia 0:da8611a6d1bb 7 unsigned char msg[0x60] =
Geremia 0:da8611a6d1bb 8 {
Geremia 0:da8611a6d1bb 9 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
Geremia 0:da8611a6d1bb 10 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
Geremia 0:da8611a6d1bb 11 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
Geremia 0:da8611a6d1bb 12 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
Geremia 0:da8611a6d1bb 13 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
Geremia 0:da8611a6d1bb 14 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
Geremia 0:da8611a6d1bb 15 } ;
Geremia 0:da8611a6d1bb 16 int main()
Geremia 0:da8611a6d1bb 17 {
Geremia 0:da8611a6d1bb 18 pc.baud (115200);
Geremia 0:da8611a6d1bb 19 pc.printf("\r\nCleartext");
Geremia 0:da8611a6d1bb 20 for(char i=0; i<0x60; i++)
Geremia 0:da8611a6d1bb 21 {
Geremia 0:da8611a6d1bb 22 if(i%16==0) pc.printf("\r\n");
Geremia 0:da8611a6d1bb 23 pc.printf("%.2X",msg[i]);
Geremia 0:da8611a6d1bb 24 }
Geremia 0:da8611a6d1bb 25
Geremia 0:da8611a6d1bb 26 // init crypto
Geremia 0:da8611a6d1bb 27 //AES myAES(AES_128, myKEY); // will default to ECB_MODE
Geremia 0:da8611a6d1bb 28 //AES myAES(AES_128, myKEY, myIV); // will default to CBC_MODE
Geremia 0:da8611a6d1bb 29 AES myAES(AES_128, myKEY, myIV, PCBC_MODE); // specify all params, look at BlockCipher.h for modes
Geremia 0:da8611a6d1bb 30 pc.printf("\r\n\r\nFirst run\r\n");
Geremia 0:da8611a6d1bb 31 myAES.encrypt(msg,msg,0x60); // same in and out buffer can be used
Geremia 0:da8611a6d1bb 32 pc.printf("\r\nEncrypted");
Geremia 0:da8611a6d1bb 33 for(char i=0; i<0x60; i++)
Geremia 0:da8611a6d1bb 34 {
Geremia 0:da8611a6d1bb 35 if(i%16==0) pc.printf("\r\n");
Geremia 0:da8611a6d1bb 36 pc.printf("%.2X",msg[i]);
Geremia 0:da8611a6d1bb 37 }
Geremia 0:da8611a6d1bb 38 pc.printf("\r\nDecrypted again");
Geremia 0:da8611a6d1bb 39 myAES.decrypt(msg,msg,0x60);
Geremia 0:da8611a6d1bb 40 for(char i=0; i<0x60; i++)
Geremia 0:da8611a6d1bb 41 {
Geremia 0:da8611a6d1bb 42 if(i%16==0) pc.printf("\r\n");
Geremia 0:da8611a6d1bb 43 pc.printf("%.2X",msg[i]);
Geremia 0:da8611a6d1bb 44 }
Geremia 0:da8611a6d1bb 45 // change key and IV without reinit all
Geremia 0:da8611a6d1bb 46 unsigned char newKey[16];
Geremia 0:da8611a6d1bb 47 unsigned char newIV[16];
Geremia 0:da8611a6d1bb 48 memset(newKey, 0x22, 16);
Geremia 0:da8611a6d1bb 49 memset(newIV, 0x33, 16);
Geremia 0:da8611a6d1bb 50 myAES.keyExpansion(newKey);
Geremia 0:da8611a6d1bb 51 myAES.setIV(newIV);
Geremia 0:da8611a6d1bb 52 pc.printf("\r\n\r\nKey and IV changed\r\n");
Geremia 0:da8611a6d1bb 53 unsigned char plaintext[0x60];
Geremia 0:da8611a6d1bb 54 unsigned char ciphertext[0x60];
Geremia 0:da8611a6d1bb 55 myAES.encrypt(ciphertext,msg,0x60); // different buffers if you have space
Geremia 0:da8611a6d1bb 56 pc.printf("\r\nEncrypted");
Geremia 0:da8611a6d1bb 57 for(char i=0; i<0x60; i++)
Geremia 0:da8611a6d1bb 58 {
Geremia 0:da8611a6d1bb 59 if(i%16==0) pc.printf("\r\n");
Geremia 0:da8611a6d1bb 60 pc.printf("%.2X",ciphertext[i]);
Geremia 0:da8611a6d1bb 61 }
Geremia 0:da8611a6d1bb 62 pc.printf("\r\nDecrypted again");
Geremia 0:da8611a6d1bb 63 myAES.decrypt(plaintext,ciphertext,0x60); // different buffers if you have space
Geremia 0:da8611a6d1bb 64 for(char i=0; i<0x60; i++)
Geremia 0:da8611a6d1bb 65 {
Geremia 0:da8611a6d1bb 66 if(i%16==0) pc.printf("\r\n");
Geremia 0:da8611a6d1bb 67 pc.printf("%.2X",plaintext[i]);
Geremia 0:da8611a6d1bb 68 }
Geremia 0:da8611a6d1bb 69
Geremia 0:da8611a6d1bb 70 }