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/*
* Demo on how to use /dev/crypto device for HMAC.
*
* 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
#define SHA1_HASH_LEN 20
static int
test_crypto(int cfd)
{
struct {
uint8_t in[DATA_SIZE],
encrypted[DATA_SIZE],
decrypted[DATA_SIZE],
iv[BLOCK_SIZE],
key[KEY_SIZE];
} data;
struct session_op sess;
struct crypt_op cryp;
uint8_t mac[AALG_MAX_RESULT_LEN];
uint8_t oldmac[AALG_MAX_RESULT_LEN];
uint8_t md5_hmac_out[] = "\x75\x0c\x78\x3e\x6a\xb0\xb5\x03\xea\xa8\x6e\x31\x0a\x5d\xb7\x38";
uint8_t sha1_out[] = "\x8f\x82\x03\x94\xf9\x53\x35\x18\x20\x45\xda\x24\xf3\x4d\xe5\x2b\xf8\xbc\x34\x32";
int i;
memset(&sess, 0, sizeof(sess));
memset(&cryp, 0, sizeof(cryp));
/* Use the garbage that is on the stack :-) */
/* memset(&data, 0, sizeof(data)); */
/* SHA1 plain test */
memset(mac, 0, sizeof(mac));
sess.cipher = 0;
sess.mac = CRYPTO_SHA1;
if (ioctl(cfd, CIOCGSESSION, &sess)) {
perror("ioctl(CIOCGSESSION)");
return 1;
}
cryp.ses = sess.ses;
cryp.len = sizeof("what do ya want for nothing?")-1;
cryp.src = "what do ya want for nothing?";
cryp.mac = mac;
cryp.op = COP_ENCRYPT;
if (ioctl(cfd, CIOCCRYPT, &cryp)) {
perror("ioctl(CIOCCRYPT)");
return 1;
}
if (memcmp(mac, sha1_out, 20)!=0) {
printf("mac: ");
for (i=0;i<SHA1_HASH_LEN;i++) {
printf("%.2x", (uint8_t)mac[i]);
}
puts("\n");
fprintf(stderr, "HASH test 1: failed\n");
} else {
fprintf(stderr, "HASH test 1: passed\n");
}
/* MD5-HMAC test */
memset(mac, 0, sizeof(mac));
sess.cipher = 0;
sess.mackey = (uint8_t*)"Jefe";
sess.mackeylen = 4;
sess.mac = CRYPTO_MD5_HMAC;
if (ioctl(cfd, CIOCGSESSION, &sess)) {
perror("ioctl(CIOCGSESSION)");
return 1;
}
cryp.ses = sess.ses;
cryp.len = sizeof("what do ya want for nothing?")-1;
cryp.src = "what do ya want for nothing?";
cryp.mac = mac;
cryp.op = COP_ENCRYPT;
if (ioctl(cfd, CIOCCRYPT, &cryp)) {
perror("ioctl(CIOCCRYPT)");
return 1;
}
if (memcmp(mac, md5_hmac_out, 16)!=0) {
printf("mac: ");
for (i=0;i<SHA1_HASH_LEN;i++) {
printf("%.2x", (uint8_t)mac[i]);
}
puts("\n");
fprintf(stderr, "HMAC test 1: failed\n");
} else {
fprintf(stderr, "HMAC test 1: passed\n");
}
/* Hash and encryption in one step test */
sess.cipher = CRYPTO_AES_CBC;
sess.mac = CRYPTO_SHA1_HMAC;
sess.keylen = KEY_SIZE;
sess.key = data.key;
sess.mackeylen = 16;
sess.mackey = (uint8_t*)"\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b";
if (ioctl(cfd, CIOCGSESSION, &sess)) {
perror("ioctl(CIOCGSESSION)");
return 1;
}
/* Encrypt data.in to data.encrypted */
cryp.ses = sess.ses;
cryp.len = sizeof(data.in);
cryp.src = data.in;
cryp.dst = data.encrypted;
cryp.iv = data.iv;
cryp.mac = mac;
cryp.op = COP_ENCRYPT;
if (ioctl(cfd, CIOCCRYPT, &cryp)) {
perror("ioctl(CIOCCRYPT)");
return 1;
}
memcpy(oldmac, mac, sizeof(mac));
/* Decrypt data.encrypted to data.decrypted */
cryp.src = data.encrypted;
cryp.dst = data.decrypted;
cryp.op = COP_DECRYPT;
if (ioctl(cfd, CIOCCRYPT, &cryp)) {
perror("ioctl(CIOCCRYPT)");
return 1;
}
/* Verify the result */
if (memcmp(data.in, data.decrypted, sizeof(data.in)) != 0) {
fprintf(stderr,
"FAIL: Decrypted data are different from the input data.\n");
return 1;
} else
printf("Crypt Test: passed\n");
if (memcmp(mac, oldmac, 20) != 0) {
fprintf(stderr,
"FAIL: Hash in decrypted data different than in encrypted.\n");
return 1;
} else
printf("HMAC Test 2: 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_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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