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- dtucker@cvs.openbsd.org 2013/06/03 00:03:18 

[mac.c]
     force the MAC output to be 64-bit aligned so umac won't see unaligned
     accesses on strict-alignment architectures.  bz#2101, patch from
     tomas.kuthan at oracle.com, ok djm@
This commit is contained in:
Darren Tucker 2013-06-06 08:12:37 +10:00
parent ea8342c248
commit 4ac66af091
2 changed files with 16 additions and 8 deletions
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5
ChangeLog
View File

@ -17,6 +17,11 @@
[clientloop.h clientloop.c mux.c] [clientloop.h clientloop.c mux.c]
No need for the mux cleanup callback to be visible so restore it to static No need for the mux cleanup callback to be visible so restore it to static
and call it through the detach_user function pointer. ok djm@ and call it through the detach_user function pointer. ok djm@
- dtucker@cvs.openbsd.org 2013/06/03 00:03:18
[mac.c]
force the MAC output to be 64-bit aligned so umac won't see unaligned
accesses on strict-alignment architectures. bz#2101, patch from
tomas.kuthan at oracle.com, ok djm@
20130602 20130602
- (tim) [Makefile.in] Make Solaris, UnixWare, & OpenServer linkers happy - (tim) [Makefile.in] Make Solaris, UnixWare, & OpenServer linkers happy

19
mac.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: mac.c,v 1.23 2013/05/17 00:13:13 djm Exp $ */ /* $OpenBSD: mac.c,v 1.24 2013/06/03 00:03:18 dtucker Exp $ */
/* /*
* Copyright (c) 2001 Markus Friedl. All rights reserved. * Copyright (c) 2001 Markus Friedl. All rights reserved.
* *
@ -174,12 +174,15 @@ mac_init(Mac *mac)
u_char * u_char *
mac_compute(Mac *mac, u_int32_t seqno, u_char *data, int datalen) mac_compute(Mac *mac, u_int32_t seqno, u_char *data, int datalen)
{ {
static u_char m[EVP_MAX_MD_SIZE]; static union {
u_char m[EVP_MAX_MD_SIZE];
u_int64_t for_align;
} u;
u_char b[4], nonce[8]; u_char b[4], nonce[8];
if (mac->mac_len > sizeof(m)) if (mac->mac_len > sizeof(u))
fatal("mac_compute: mac too long %u %lu", fatal("mac_compute: mac too long %u %lu",
mac->mac_len, (u_long)sizeof(m)); mac->mac_len, (u_long)sizeof(u));
switch (mac->type) { switch (mac->type) {
case SSH_EVP: case SSH_EVP:
@ -188,22 +191,22 @@ mac_compute(Mac *mac, u_int32_t seqno, u_char *data, int datalen)
HMAC_Init(&mac->evp_ctx, NULL, 0, NULL); HMAC_Init(&mac->evp_ctx, NULL, 0, NULL);
HMAC_Update(&mac->evp_ctx, b, sizeof(b)); HMAC_Update(&mac->evp_ctx, b, sizeof(b));
HMAC_Update(&mac->evp_ctx, data, datalen); HMAC_Update(&mac->evp_ctx, data, datalen);
HMAC_Final(&mac->evp_ctx, m, NULL); HMAC_Final(&mac->evp_ctx, u.m, NULL);
break; break;
case SSH_UMAC: case SSH_UMAC:
put_u64(nonce, seqno); put_u64(nonce, seqno);
umac_update(mac->umac_ctx, data, datalen); umac_update(mac->umac_ctx, data, datalen);
umac_final(mac->umac_ctx, m, nonce); umac_final(mac->umac_ctx, u.m, nonce);
break; break;
case SSH_UMAC128: case SSH_UMAC128:
put_u64(nonce, seqno); put_u64(nonce, seqno);
umac128_update(mac->umac_ctx, data, datalen); umac128_update(mac->umac_ctx, data, datalen);
umac128_final(mac->umac_ctx, m, nonce); umac128_final(mac->umac_ctx, u.m, nonce);
break; break;
default: default:
fatal("mac_compute: unknown MAC type"); fatal("mac_compute: unknown MAC type");
} }
return (m); return (u.m);
} }
void void