C++ (Cpp) ssh_hmac_free Examples

Example #1

File: mac.c Project: 0x0mar/backdoored-ssh

void
mac_clear(Mac *mac)
{
	if (mac->type == SSH_UMAC) {
		if (mac->umac_ctx != NULL)
			umac_delete(mac->umac_ctx);
	} else if (mac->type == SSH_UMAC128) {
		if (mac->umac_ctx != NULL)
			umac128_delete(mac->umac_ctx);
	} else if (mac->hmac_ctx != NULL)
		ssh_hmac_free(mac->hmac_ctx);
	mac->hmac_ctx = NULL;
	mac->umac_ctx = NULL;
}

Example #2

File: hmac.c Project: randombit/hacrypto

struct ssh_hmac_ctx *
ssh_hmac_start(int alg)
{
	struct ssh_hmac_ctx	*ret;

	if ((ret = calloc(1, sizeof(*ret))) == NULL)
		return NULL;
	ret->alg = alg;
	if ((ret->ictx = ssh_digest_start(alg)) == NULL ||
	    (ret->octx = ssh_digest_start(alg)) == NULL ||
	    (ret->digest = ssh_digest_start(alg)) == NULL)
		goto fail;
	ret->buf_len = ssh_digest_blocksize(ret->ictx);
	if ((ret->buf = calloc(1, ret->buf_len)) == NULL)
		goto fail;
	return ret;
fail:
	ssh_hmac_free(ret);
	return NULL;
}

Example #3

File: hmac.c Project: randombit/hacrypto

/* cc -DTEST hmac.c digest.c buffer.c cleanup.c fatal.c log.c xmalloc.c -lcrypto */
static void
hmac_test(void *key, size_t klen, void *m, size_t mlen, u_char *e, size_t elen)
{
	struct ssh_hmac_ctx	*ctx;
	size_t			 i;
	u_char			 digest[16];

	if ((ctx = ssh_hmac_start(SSH_DIGEST_MD5)) == NULL)
		printf("ssh_hmac_start failed");
	if (ssh_hmac_init(ctx, key, klen) < 0 ||
	    ssh_hmac_update(ctx, m, mlen) < 0 ||
	    ssh_hmac_final(ctx, digest, sizeof(digest)) < 0)
		printf("ssh_hmac_xxx failed");
	ssh_hmac_free(ctx);

	if (memcmp(e, digest, elen)) {
		for (i = 0; i < elen; i++)
			printf("[%zd] %2.2x %2.2x\n", i, e[i], digest[i]);
		printf("mismatch\n");
	} else
		printf("ok\n");
}

Example #4

File: hostfile.c Project: 2asoft/freebsd

char *
host_hash(const char *host, const char *name_from_hostfile, u_int src_len)
{
	struct ssh_hmac_ctx *ctx;
	u_char salt[256], result[256];
	char uu_salt[512], uu_result[512];
	static char encoded[1024];
	u_int i, len;

	len = ssh_digest_bytes(SSH_DIGEST_SHA1);

	if (name_from_hostfile == NULL) {
		/* Create new salt */
		for (i = 0; i < len; i++)
			salt[i] = arc4random();
	} else {
		/* Extract salt from known host entry */
		if (extract_salt(name_from_hostfile, src_len, salt,
		    sizeof(salt)) == -1)
			return (NULL);
	}

	if ((ctx = ssh_hmac_start(SSH_DIGEST_SHA1)) == NULL ||
	    ssh_hmac_init(ctx, salt, len) < 0 ||
	    ssh_hmac_update(ctx, host, strlen(host)) < 0 ||
	    ssh_hmac_final(ctx, result, sizeof(result)))
		fatal("%s: ssh_hmac failed", __func__);
	ssh_hmac_free(ctx);

	if (__b64_ntop(salt, len, uu_salt, sizeof(uu_salt)) == -1 ||
	    __b64_ntop(result, len, uu_result, sizeof(uu_result)) == -1)
		fatal("%s: __b64_ntop failed", __func__);

	snprintf(encoded, sizeof(encoded), "%s%s%c%s", HASH_MAGIC, uu_salt,
	    HASH_DELIM, uu_result);

	return (encoded);
}