static int
EncryptCFB(
int cipher,
int rounds,
int counterMode,
unsigned char *iv,
unsigned char *key,
unsigned long keyLength,
unsigned char *data,
unsigned long dataLength,
unsigned char *dest
)
{
int status;
symmetric_CFB state;
status = cfb_start(cipher, iv, key, keyLength, rounds, &state);
if (status == CRYPT_OK) {
status = cfb_encrypt(data, dest, dataLength, &state);
cfb_done(&state);
}
return status;
}
int main(){
char plaintext[] = "Hi I am an XTEA CFB test vector distributed on 8 64-bit blocks!";
unsigned char key[16] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f};
unsigned char iv[8] = {0x01, 0xff, 0x83, 0xf2, 0xf9, 0x98, 0xba, 0xa4};
symmetric_CFB cfb;
unsigned char ciphertext[sizeof(plaintext)];
unsigned char deciphertext[sizeof(plaintext)];
int err;
if (register_cipher(&xtea_desc) == -1) {
printf("Error: in %s, unable to register cipher\n", __func__);
return 0;
}
printf("Plaintext: \"%s\"\n", plaintext);
printf("IV: ");
fprintBuffer_raw(stdout, (char*)iv, sizeof(iv));
printf("\nKey: ");
fprintBuffer_raw(stdout, (char*)key, sizeof(key));
/* ENCRYPT */
if ((err = cfb_start(find_cipher("xtea"), iv, key, sizeof(key), 0, &cfb)) != CRYPT_OK){
printf("ERROR: in %s, %s\n", __func__, error_to_string(err));
return 0;
}
if ((err = cfb_encrypt((unsigned char*)plaintext, ciphertext, sizeof(plaintext), &cfb)) != CRYPT_OK){
printf("ERROR: in %s, %s\n", __func__, error_to_string(err));
return 0;
}
if ((err = cfb_done(&cfb)) != CRYPT_OK){
printf("ERROR: in %s, %s\n", __func__, error_to_string(err));
return 0;
}
/* DECRYPT */
if ((err = cfb_start(find_cipher("xtea"), iv, key, sizeof(key), 0, &cfb)) != CRYPT_OK){
printf("ERROR: in %s, %s\n", __func__, error_to_string(err));
return 0;
}
if ((err = cfb_decrypt(ciphertext, deciphertext, sizeof(plaintext), &cfb)) != CRYPT_OK){
printf("ERROR: in %s, %s\n", __func__, error_to_string(err));
return 0;
}
if ((err = cfb_done(&cfb)) != CRYPT_OK){
printf("ERROR: in %s, %s\n", __func__, error_to_string(err));
return 0;
}
printf("\nCiphertext CFB: ");
fprintBuffer_raw(stdout, (char*)ciphertext, sizeof(plaintext));
if (memcmp(deciphertext, plaintext, sizeof(plaintext)) == 0){
printf("\nRecovery: OK\n");
}
else{
printf("\nRecovery: FAIL\n");
}
return 0;
}
