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| author | Darren Tucker <dtucker@zip.com.au> | 2013-06-06 00:12:37 +0200 |
|---|---|---|
| committer | Darren Tucker <dtucker@zip.com.au> | 2013-06-06 00:12:37 +0200 |
| commit | 4ac66af091cf6db5a42c18e43738ca9c41e338e5 (patch) | |
| tree | 541bce15520b26aa1a16e28ccbe4ab1d50349449 /mac.c | |
| parent | - dtucker@cvs.openbsd.org 2013/06/02 23:36:29 (diff) | |
| download | openssh-4ac66af091cf6db5a42c18e43738ca9c41e338e5.tar.xz openssh-4ac66af091cf6db5a42c18e43738ca9c41e338e5.zip | |
- 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@
Diffstat (limited to 'mac.c')
| -rw-r--r-- | mac.c | 19 |
1 files changed, 11 insertions, 8 deletions
@@ -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. * @@ -174,12 +174,15 @@ mac_init(Mac *mac) u_char * 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]; - if (mac->mac_len > sizeof(m)) + if (mac->mac_len > sizeof(u)) 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) { 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_Update(&mac->evp_ctx, b, sizeof(b)); HMAC_Update(&mac->evp_ctx, data, datalen); - HMAC_Final(&mac->evp_ctx, m, NULL); + HMAC_Final(&mac->evp_ctx, u.m, NULL); break; case SSH_UMAC: put_u64(nonce, seqno); umac_update(mac->umac_ctx, data, datalen); - umac_final(mac->umac_ctx, m, nonce); + umac_final(mac->umac_ctx, u.m, nonce); break; case SSH_UMAC128: put_u64(nonce, seqno); umac128_update(mac->umac_ctx, data, datalen); - umac128_final(mac->umac_ctx, m, nonce); + umac128_final(mac->umac_ctx, u.m, nonce); break; default: fatal("mac_compute: unknown MAC type"); } - return (m); + return (u.m); } void |