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gpg: Ignore all SHA-1 signatures in 3rd party key signatures.

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* g10/sig-check.c (check_signature_over_key_or_uid): No cut-off date
and remove debug output.
--

With 2.2 we do not not support SHA-1 key signatures anymore even if
that means that the WoT shrinks.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2019-10-03 18:20:59 +02:00
parent c4f2d9e3e1
commit 7d9aad63c4
No known key found for this signature in database
GPG Key ID: E3FDFF218E45B72B
1 changed files with 2 additions and 6 deletions
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8
g10/sig-check.c
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@ -1012,16 +1012,12 @@ check_signature_over_key_or_uid (ctrl_t ctrl, PKT_public_key *signer,
else if (IS_UID_SIG (sig) || IS_UID_REV (sig))
{
log_assert (packet->pkttype == PKT_USER_ID);
log_debug ("algo=%d selfsig=%d tm=%lu\n",
sig->digest_algo, *is_selfsig, (unsigned long)sig->timestamp);
if (sig->digest_algo == DIGEST_ALGO_SHA1 && !*is_selfsig
&& sig->timestamp > 1547856000)
if (sig->digest_algo == DIGEST_ALGO_SHA1 && !*is_selfsig)
{
/* If the signature was created using SHA-1 we consider this
* signature invalid because it makes it possible to mount a
* chosen-prefix collision. We don't do this for
* self-signatures or for signatures created before the
* somewhat arbitrary cut-off date 2019-01-19. */
* self-signatures, though. */
rc = gpg_error (GPG_ERR_DIGEST_ALGO);
}
else