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dirmngr: Fallback to CRL if no default OCSP responder is configured.
* dirmngr/server.c (cmd_isvalid): Use option second arg to trigger OCSP checkibng. Fallback to CRL if no default OCSP responder has been configured. * sm/call-dirmngr.c (gpgsm_dirmngr_isvalid): Adjust accordingly. Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch
parent
d2ad715441
commit
460e3812be
@ -1105,7 +1105,7 @@ cmd_ldapserver (assuan_context_t ctx, char *line)
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static const char hlp_isvalid[] =
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"ISVALID [--only-ocsp] [--force-default-responder]"
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" <certificate_id>|<certificate_fpr>\n"
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" <certificate_id> [<certificate_fpr>]\n"
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"\n"
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"This command checks whether the certificate identified by the\n"
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"certificate_id is valid. This is done by consulting CRLs or\n"
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@ -1117,8 +1117,9 @@ static const char hlp_isvalid[] =
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"delimited by a single dot. The first part is the SHA-1 hash of the\n"
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"issuer name and the second part the serial number.\n"
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"\n"
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"Alternatively the certificate's fingerprint may be given in which\n"
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"case an OCSP request is done before consulting the CRL.\n"
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"If an OCSP check is desired CERTIFICATE_FPR with the hex encoded\n"
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"fingerprint of the certificate is required. In this case an OCSP\n"
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"request is done before consulting the CRL.\n"
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"\n"
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"If the option --only-ocsp is given, no fallback to a CRL check will\n"
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"be used.\n"
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@ -1130,7 +1131,7 @@ static gpg_error_t
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cmd_isvalid (assuan_context_t ctx, char *line)
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{
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ctrl_t ctrl = assuan_get_pointer (ctx);
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char *issuerhash, *serialno;
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char *issuerhash, *serialno, *fpr;
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gpg_error_t err;
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int did_inquire = 0;
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int ocsp_mode = 0;
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@ -1141,25 +1142,36 @@ cmd_isvalid (assuan_context_t ctx, char *line)
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force_default_responder = has_option (line, "--force-default-responder");
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line = skip_options (line);
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issuerhash = xstrdup (line); /* We need to work on a copy of the
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line because that same Assuan
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context may be used for an inquiry.
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That is because Assuan reuses its
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line buffer.
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*/
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/* We need to work on a copy of the line because that same Assuan
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* context may be used for an inquiry. That is because Assuan
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* reuses its line buffer. */
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issuerhash = xstrdup (line);
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serialno = strchr (issuerhash, '.');
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if (serialno)
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*serialno++ = 0;
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else
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if (!serialno)
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{
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char *endp = strchr (issuerhash, ' ');
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xfree (issuerhash);
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return leave_cmd (ctx, PARM_ERROR (_("serialno missing in cert ID")));
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}
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*serialno++ = 0;
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if (strlen (issuerhash) != 40)
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{
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xfree (issuerhash);
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return leave_cmd (ctx, PARM_ERROR ("cert ID is too short"));
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}
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fpr = strchr (serialno, ' ');
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while (fpr && spacep (fpr))
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fpr++;
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if (fpr && *fpr)
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{
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char *endp = strchr (fpr, ' ');
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if (endp)
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*endp = 0;
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if (strlen (issuerhash) != 40)
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if (strlen (fpr) != 40)
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{
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xfree (issuerhash);
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return leave_cmd (ctx, PARM_ERROR (_("serialno missing in cert ID")));
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return leave_cmd (ctx, PARM_ERROR ("fingerprint too short"));
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}
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ocsp_mode = 1;
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}
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@ -1168,17 +1180,24 @@ cmd_isvalid (assuan_context_t ctx, char *line)
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again:
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if (ocsp_mode)
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{
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/* Note, that we ignore the given issuer hash and instead rely
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on the current certificate semantics used with this
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command. */
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/* Note, that we currently ignore the supplied fingerprint FPR;
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* instead ocsp_isvalid does an inquire to ask for the cert.
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* The fingerprint may eventually be used to lookup the
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* certificate in a local cache. */
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if (!opt.allow_ocsp)
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err = gpg_error (GPG_ERR_NOT_SUPPORTED);
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else
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err = ocsp_isvalid (ctrl, NULL, NULL, force_default_responder);
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/* Fixme: If we got no ocsp response and --only-ocsp is not used
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we should fall back to CRL mode. Thus we need to clear
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OCSP_MODE, get the issuerhash and the serialno from the
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current certificate and jump to again. */
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if (gpg_err_code (err) == GPG_ERR_CONFIGURATION
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&& gpg_err_source (err) == GPG_ERR_SOURCE_DIRMNGR)
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{
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/* No default responder configured - fallback to CRL. */
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if (!only_ocsp)
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log_info ("falling back to CRL check\n");
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ocsp_mode = 0;
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goto again;
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}
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}
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else if (only_ocsp)
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err = gpg_error (GPG_ERR_NO_CRL_KNOWN);
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@ -491,8 +491,8 @@ isvalid_status_cb (void *opaque, const char *line)
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Values for USE_OCSP:
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0 = Do CRL check.
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1 = Do an OCSP check.
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2 = Do an OCSP check using only the default responder.
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1 = Do an OCSP check but fallback to CRL unless CRLS are disabled.
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2 = Do only an OCSP check using only the default responder.
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*/
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int
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gpgsm_dirmngr_isvalid (ctrl_t ctrl,
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@ -500,7 +500,7 @@ gpgsm_dirmngr_isvalid (ctrl_t ctrl,
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{
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static int did_options;
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int rc;
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char *certid;
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char *certid, *certfpr;
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char line[ASSUAN_LINELENGTH];
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struct inq_certificate_parm_s parm;
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struct isvalid_status_parm_s stparm;
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@ -509,19 +509,13 @@ gpgsm_dirmngr_isvalid (ctrl_t ctrl,
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if (rc)
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return rc;
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if (use_ocsp)
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certfpr = gpgsm_get_fingerprint_hexstring (cert, GCRY_MD_SHA1);
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certid = gpgsm_get_certid (cert);
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if (!certid)
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{
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certid = gpgsm_get_fingerprint_hexstring (cert, GCRY_MD_SHA1);
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}
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else
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{
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certid = gpgsm_get_certid (cert);
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if (!certid)
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{
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log_error ("error getting the certificate ID\n");
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release_dirmngr (ctrl);
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return gpg_error (GPG_ERR_GENERAL);
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}
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log_error ("error getting the certificate ID\n");
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release_dirmngr (ctrl);
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return gpg_error (GPG_ERR_GENERAL);
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}
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if (opt.verbose > 1)
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@ -541,13 +535,8 @@ gpgsm_dirmngr_isvalid (ctrl_t ctrl,
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stparm.seen = 0;
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memset (stparm.fpr, 0, 20);
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/* FIXME: If --disable-crl-checks has been set, we should pass an
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option to dirmngr, so that no fallback CRL check is done after an
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ocsp check. It is not a problem right now as dirmngr does not
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fallback to CRL checking. */
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/* It is sufficient to send the options only once because we have
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one connection per process only. */
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* one connection per process only. */
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if (!did_options)
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{
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if (opt.force_crl_refresh)
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@ -555,10 +544,14 @@ gpgsm_dirmngr_isvalid (ctrl_t ctrl,
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NULL, NULL, NULL, NULL, NULL, NULL);
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did_options = 1;
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}
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snprintf (line, DIM(line), "ISVALID%s %s",
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use_ocsp == 2? " --only-ocsp --force-default-responder":"",
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certid);
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snprintf (line, DIM(line), "ISVALID%s%s %s%s%s",
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use_ocsp == 2 || opt.no_crl_check ? " --only-ocsp":"",
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use_ocsp == 2? " --force-default-responder":"",
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certid,
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use_ocsp? " ":"",
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use_ocsp? certfpr:"");
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xfree (certid);
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xfree (certfpr);
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rc = assuan_transact (dirmngr_ctx, line, NULL, NULL,
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inq_certificate, &parm,
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