diff options
Diffstat (limited to 'crypto/openssh/mac.c')
| -rw-r--r-- | crypto/openssh/mac.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/crypto/openssh/mac.c b/crypto/openssh/mac.c index 097f0b9..2bda5a1 100644 --- a/crypto/openssh/mac.c +++ b/crypto/openssh/mac.c @@ -23,7 +23,7 @@ */ #include "includes.h" -RCSID("$OpenBSD: mac.c,v 1.6 2003/09/18 13:02:21 miod Exp $"); +RCSID("$OpenBSD: mac.c,v 1.7 2005/06/17 02:44:32 djm Exp $"); #include <openssl/hmac.h> @@ -51,12 +51,15 @@ struct { 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 = EVP_MD_size(mac->md); + 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; } @@ -77,7 +80,7 @@ mac_compute(Mac *mac, u_int32_t seqno, u_char *data, int datalen) if (mac->key == NULL) fatal("mac_compute: no key"); - if ((u_int)mac->mac_len > sizeof(m)) + if (mac->mac_len > sizeof(m)) fatal("mac_compute: mac too long"); HMAC_Init(&c, mac->key, mac->key_len, mac->md); PUT_32BIT(b, seqno); |
