*/
#include "includes.h"
-RCSID("$OpenBSD: mac.c,v 1.3 2001/12/19 07:18:56 deraadt Exp $");
+RCSID("$OpenBSD: mac.c,v 1.7 2005/06/17 02:44:32 djm Exp $");
#include <openssl/hmac.h>
struct {
char *name;
- EVP_MD * (*mdfunc)(void);
+ const EVP_MD * (*mdfunc)(void);
int truncatebits; /* truncate digest if != 0 */
} macs[] = {
{ "hmac-sha1", EVP_sha1, 0, },
int
mac_init(Mac *mac, char *name)
{
- int i;
+ int i, evp_len;
+
for (i = 0; macs[i].name; i++) {
if (strcmp(name, macs[i].name) == 0) {
if (mac != NULL) {
mac->md = (*macs[i].mdfunc)();
- mac->key_len = mac->mac_len = mac->md->md_size;
+ if ((evp_len = EVP_MD_size(mac->md)) <= 0)
+ fatal("mac %s len %d", name, evp_len);
+ mac->key_len = mac->mac_len = (u_int)evp_len;
if (macs[i].truncatebits != 0)
mac->mac_len = macs[i].truncatebits/8;
}