modified
udaes.cpp@0:31def6dfae65, 2017-09-27 (annotated)
- Committer:
- ajeet3004
- Date:
- Wed Sep 27 10:16:33 2017 +0000
- Revision:
- 0:31def6dfae65
modified
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
ajeet3004 | 0:31def6dfae65 | 1 | #include "mbed.h" |
ajeet3004 | 0:31def6dfae65 | 2 | #include "udaes.h" |
ajeet3004 | 0:31def6dfae65 | 3 | #include "AES.h" |
ajeet3004 | 0:31def6dfae65 | 4 | #include<cstring> |
ajeet3004 | 0:31def6dfae65 | 5 | |
ajeet3004 | 0:31def6dfae65 | 6 | Serial aespc(USBTX,USBRX); //USB serial pin to print in the console |
ajeet3004 | 0:31def6dfae65 | 7 | AES aes; //Object for AES |
ajeet3004 | 0:31def6dfae65 | 8 | const char key[16] = { 0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6, 0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C }; //Key used for AES encryption and decryption |
ajeet3004 | 0:31def6dfae65 | 9 | const char iv[16] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F }; //Format used for AES-CBC encryption and decryption |
ajeet3004 | 0:31def6dfae65 | 10 | char message1[16]; //Character array to store the decrypted message |
ajeet3004 | 0:31def6dfae65 | 11 | char encackmsg[16]; //Character array to store the encrypted message |
ajeet3004 | 0:31def6dfae65 | 12 | |
ajeet3004 | 0:31def6dfae65 | 13 | |
ajeet3004 | 0:31def6dfae65 | 14 | //Function to print the hexadecimal ASCII value of the data taking data and its length as parameters |
ajeet3004 | 0:31def6dfae65 | 15 | void printData(const void* data, size_t length) |
ajeet3004 | 0:31def6dfae65 | 16 | { |
ajeet3004 | 0:31def6dfae65 | 17 | const char* dataBytes = (const char*)data; //Casting the data to the character pointers |
ajeet3004 | 0:31def6dfae65 | 18 | for (size_t i = 0; i < length; i++) { |
ajeet3004 | 0:31def6dfae65 | 19 | if ((i % 8) == 0) |
ajeet3004 | 0:31def6dfae65 | 20 | printf("\n\t"); |
ajeet3004 | 0:31def6dfae65 | 21 | printf("0x%02X, ", dataBytes[i]); //Print the hexadecimal ASCII value of the respective character |
ajeet3004 | 0:31def6dfae65 | 22 | } |
ajeet3004 | 0:31def6dfae65 | 23 | printf("\n"); |
ajeet3004 | 0:31def6dfae65 | 24 | } |
ajeet3004 | 0:31def6dfae65 | 25 | |
ajeet3004 | 0:31def6dfae65 | 26 | |
ajeet3004 | 0:31def6dfae65 | 27 | //Function for encryption of data taking char enc[] as a parameter |
ajeet3004 | 0:31def6dfae65 | 28 | char* encryptData(char enc[]) |
ajeet3004 | 0:31def6dfae65 | 29 | { |
ajeet3004 | 0:31def6dfae65 | 30 | printf("\nOriginal message: \"%s\"", enc); //Print the message to be encrypted i.e. enc[] |
ajeet3004 | 0:31def6dfae65 | 31 | //printData(enc, 16); //Print the hexadecimal ASCII form of the data |
ajeet3004 | 0:31def6dfae65 | 32 | aes.setup(key, AES::KEY_128, AES::MODE_CBC, iv); //Setup the configuration of AES in 128 bit and CBC mode |
ajeet3004 | 0:31def6dfae65 | 33 | aes.encrypt(enc, encackmsg, 16); //Encrypt the given message and store it in encackmsg |
ajeet3004 | 0:31def6dfae65 | 34 | aes.clear(); //clear the AES |
ajeet3004 | 0:31def6dfae65 | 35 | printf("\nEncrypted message: \"%s\"\n", encackmsg); //Print the encrypted data stored in encackmsg |
ajeet3004 | 0:31def6dfae65 | 36 | printData(encackmsg, sizeof(encackmsg)); //Print the hexadecimal ASCII form of the encackmsg |
ajeet3004 | 0:31def6dfae65 | 37 | char* encstr=encackmsg; //Store the value of encackmsg in encstr |
ajeet3004 | 0:31def6dfae65 | 38 | return encstr; //Return encstr |
ajeet3004 | 0:31def6dfae65 | 39 | } |
ajeet3004 | 0:31def6dfae65 | 40 | |
ajeet3004 | 0:31def6dfae65 | 41 | |
ajeet3004 | 0:31def6dfae65 | 42 | //Function for decryption of data taking char dec[] as a parameter |
ajeet3004 | 0:31def6dfae65 | 43 | char* decryptData(char dec[]) |
ajeet3004 | 0:31def6dfae65 | 44 | { |
ajeet3004 | 0:31def6dfae65 | 45 | //aespc.printf("\nThe received message is : %s",dec); //Print the decrypted data to be encrypted i.e. dec[] |
ajeet3004 | 0:31def6dfae65 | 46 | aes.setup(key, AES::KEY_128, AES::MODE_CBC, iv); //Setup the configuration of AES in 128 bit and CBC mode |
ajeet3004 | 0:31def6dfae65 | 47 | aes.decrypt(dec, message1, sizeof(dec)); //Decrypt the given encrypted data and store it in message1 |
ajeet3004 | 0:31def6dfae65 | 48 | aes.clear(); //clear the AES |
ajeet3004 | 0:31def6dfae65 | 49 | printf("\nDecrypted message: \"%s\"", message1); //Print the Decrypted data stored in message1 |
ajeet3004 | 0:31def6dfae65 | 50 | // printData(message1, sizeof(message1)); //Print the hexadecimal ASCII form of the message1 |
ajeet3004 | 0:31def6dfae65 | 51 | char* decstr=message1; //Store the value of message1 in decstr |
ajeet3004 | 0:31def6dfae65 | 52 | return decstr; //Return decstr |
ajeet3004 | 0:31def6dfae65 | 53 | |
ajeet3004 | 0:31def6dfae65 | 54 | } |