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Force SHA1 only for v1 cards

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This commit is contained in:
Werner Koch 2010-03-26 18:11:30 +00:00
parent 5bcd4f613b
commit b0a357ad8a
2 changed files with 14 additions and 6 deletions
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15
g10/sign.c
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@ -1,6 +1,6 @@
/* sign.c - sign data
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
* 2007 Free Software Foundation, Inc.
* 2007, 2010 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
@ -414,12 +414,15 @@ hash_for(PKT_secret_key *sk)
return match_dsa_hash(qbytes);
}
else if(sk->is_protected && sk->protect.s2k.mode==1002)
else if (sk->is_protected && sk->protect.s2k.mode == 1002
&& sk->protect.ivlen == 16
&& !memcmp (sk->protect.iv, "\xD2\x76\x00\x01\x24\x01\x01", 7))
{
/* The sk lives on a smartcard, and current smartcards only
handle SHA-1 and RIPEMD/160. This is correct now, but may
need revision as the cards add algorithms. */
/* The sk lives on a smartcard, and old smartcards only handle
SHA-1 and RIPEMD/160. Newer smartcards (v2.0) don't have
this restriction anymore. Fortunately the serial number
encodes the version of the card and thus we know that this
key is on a v1 card. */
if(opt.personal_digest_prefs)
{
prefitem_t *prefs;