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dirmngr: Allow redirection from https to http for CRLs

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* dirmngr/ks-engine.h (KS_HTTP_FETCH_NOCACHE): New flag.
(KS_HTTP_FETCH_TRUST_CFG): Ditto.
(KS_HTTP_FETCH_NO_CRL): Ditto.
(KS_HTTP_FETCH_ALLOW_DOWNGRADE): Ditto.
* dirmngr/ks-engine-http.c (ks_http_fetch): Replace args send_no_cache
and extra_http_trust_flags by a new flags arg.  Allow redirectiong
from https to http it KS_HTTP_FETCH_ALLOW_DOWNGRADE is set.
* dirmngr/loadswdb.c (fetch_file): Call with KS_HTTP_FETCH_NOCACHE.
* dirmngr/ks-action.c (ks_action_get): Ditto.
(ks_action_fetch): Ditto.
* dirmngr/crlfetch.c (crl_fetch): Call with the appropriate flags.
--

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2018-04-25 12:37:34 +02:00
parent 705d8e9cf0
commit 1de4462974
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GPG key ID: E3FDFF218E45B72B
5 changed files with 40 additions and 21 deletions
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13
dirmngr/crlfetch.c
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@ -175,11 +175,14 @@ crl_fetch (ctrl_t ctrl, const char *url, ksba_reader_t *reader)
else
{
/* Note that we also allow root certificates loaded from
* "/etc/gnupg/trusted-certs/". We also do not consult
* the CRL for the TLS connection - that may lwad to a
* loop. */
err = ks_http_fetch (ctrl, url, 0,
(HTTP_FLAG_TRUST_CFG | HTTP_FLAG_NO_CRL),
* "/etc/gnupg/trusted-certs/". We also do not consult the
* CRL for the TLS connection - that may lead to a loop.
* Due to cacert.org redirecting their https URL to http we
* also allow such a downgrade. */
err = ks_http_fetch (ctrl, url,
(KS_HTTP_FETCH_TRUST_CFG
| KS_HTTP_FETCH_NO_CRL
| KS_HTTP_FETCH_ALLOW_DOWNGRADE ),
&httpfp);
}