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/*
* Demo on how to use /dev/crypto device for ciphering.
*
* Placed under public domain.
*
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include "../cryptodev.h"
#define DATA_SIZE 4096
#define BLOCK_SIZE 16
#define KEY_SIZE 16
static int
test_crypto(int cfd)
{
uint8_t plaintext[DATA_SIZE];
uint8_t ciphertext[DATA_SIZE];
uint8_t iv[BLOCK_SIZE];
uint8_t key[KEY_SIZE];
struct session_op sess;
struct crypt_op cryp;
memset(&sess, 0, sizeof(sess));
memset(&cryp, 0, sizeof(cryp));
memset(plaintext, 0x15, sizeof(plaintext));
memset(key, 0x33, sizeof(key));
memset(iv, 0x03, sizeof(iv));
/* Get crypto session for AES128 */
sess.cipher = CRYPTO_AES_CBC;
sess.keylen = KEY_SIZE;
sess.key = key;
if (ioctl(cfd, CIOCGSESSION, &sess)) {
perror("ioctl(CIOCGSESSION)");
return 1;
}
/* Encrypt data.in to data.encrypted */
cryp.ses = sess.ses;
cryp.len = sizeof(plaintext);
cryp.src = plaintext;
cryp.dst = ciphertext;
cryp.iv = iv;
cryp.op = COP_ENCRYPT;
if (ioctl(cfd, CIOCCRYPT, &cryp)) {
perror("ioctl(CIOCCRYPT)");
return 1;
}
if (ioctl(cfd, CIOCGSESSION, &sess)) {
perror("ioctl(CIOCGSESSION)");
return 1;
}
/* Decrypt data.encrypted to data.decrypted */
cryp.ses = sess.ses;
cryp.len = sizeof(plaintext);
cryp.src = ciphertext;
cryp.dst = ciphertext;
cryp.iv = iv;
cryp.op = COP_DECRYPT;
if (ioctl(cfd, CIOCCRYPT, &cryp)) {
perror("ioctl(CIOCCRYPT)");
return 1;
}
/* Verify the result */
if (memcmp(plaintext, ciphertext, sizeof(plaintext)) != 0) {
fprintf(stderr,
"FAIL: Decrypted data are different from the input data.\n");
return 1;
} else
printf("Test passed\n");
/* Finish crypto session */
if (ioctl(cfd, CIOCFSESSION, &sess.ses)) {
perror("ioctl(CIOCFSESSION)");
return 1;
}
return 0;
}
static int test_aes(int cfd)
{
uint8_t plaintext1[BLOCK_SIZE];
uint8_t ciphertext1[BLOCK_SIZE] = { 0xdf, 0x55, 0x6a, 0x33, 0x43, 0x8d, 0xb8, 0x7b, 0xc4, 0x1b, 0x17, 0x52, 0xc5, 0x5e, 0x5e, 0x49 };
uint8_t iv1[BLOCK_SIZE];
uint8_t key1[KEY_SIZE] = { 0xff, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
uint8_t plaintext2[BLOCK_SIZE] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00 };
uint8_t ciphertext2[BLOCK_SIZE] = { 0xb7, 0x97, 0x2b, 0x39, 0x41, 0xc4, 0x4b, 0x90, 0xaf, 0xa7, 0xb2, 0x64, 0xbf, 0xba, 0x73, 0x87 };
uint8_t iv2[BLOCK_SIZE];
uint8_t key2[KEY_SIZE];
struct session_op sess;
struct crypt_op cryp;
memset(&sess, 0, sizeof(sess));
memset(&cryp, 0, sizeof(cryp));
memset(plaintext1, 0x0, sizeof(plaintext1));
memset(iv1, 0x0, sizeof(iv1));
/* Get crypto session for AES128 */
sess.cipher = CRYPTO_AES_CBC;
sess.keylen = KEY_SIZE;
sess.key = key1;
if (ioctl(cfd, CIOCGSESSION, &sess)) {
perror("ioctl(CIOCGSESSION)");
return 1;
}
/* Encrypt data.in to data.encrypted */
cryp.ses = sess.ses;
cryp.len = sizeof(plaintext1);
cryp.src = plaintext1;
cryp.dst = plaintext1;
cryp.iv = iv1;
cryp.op = COP_ENCRYPT;
if (ioctl(cfd, CIOCCRYPT, &cryp)) {
perror("ioctl(CIOCCRYPT)");
return 1;
}
/* Verify the result */
if (memcmp(plaintext1, ciphertext1, sizeof(plaintext1)) != 0) {
fprintf(stderr,
"FAIL: Decrypted data are different from the input data.\n");
return 1;
}
/* Test 2 */
memset(key2, 0x0, sizeof(key2));
memset(iv2, 0x0, sizeof(iv2));
/* Get crypto session for AES128 */
sess.cipher = CRYPTO_AES_CBC;
sess.keylen = KEY_SIZE;
sess.key = key2;
if (ioctl(cfd, CIOCGSESSION, &sess)) {
perror("ioctl(CIOCGSESSION)");
return 1;
}
/* Encrypt data.in to data.encrypted */
cryp.ses = sess.ses;
cryp.len = sizeof(plaintext2);
cryp.src = plaintext2;
cryp.dst = plaintext2;
cryp.iv = iv2;
cryp.op = COP_ENCRYPT;
if (ioctl(cfd, CIOCCRYPT, &cryp)) {
perror("ioctl(CIOCCRYPT)");
return 1;
}
/* Verify the result */
if (memcmp(plaintext2, ciphertext2, sizeof(plaintext2)) != 0) {
fprintf(stderr,
"FAIL: Decrypted data are different from the input data.\n");
return 1;
}
printf("AES Test passed\n");
/* Finish crypto session */
if (ioctl(cfd, CIOCFSESSION, &sess.ses)) {
perror("ioctl(CIOCFSESSION)");
return 1;
}
return 0;
}
int
main()
{
int fd = -1, cfd = -1;
/* Open the crypto device */
fd = open("/dev/crypto", O_RDWR, 0);
if (fd < 0) {
perror("open(/dev/crypto)");
return 1;
}
/* Clone file descriptor */
if (ioctl(fd, CRIOGET, &cfd)) {
perror("ioctl(CRIOGET)");
return 1;
}
/* Set close-on-exec (not really neede here) */
if (fcntl(cfd, F_SETFD, 1) == -1) {
perror("fcntl(F_SETFD)");
return 1;
}
/* Run the test itself */
if (test_aes(cfd))
return 1;
if (test_crypto(cfd))
return 1;
/* Close cloned descriptor */
if (close(cfd)) {
perror("close(cfd)");
return 1;
}
/* Close the original descriptor */
if (close(fd)) {
perror("close(fd)");
return 1;
}
return 0;
}
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