gpgsm: Add new validation model "steed".

* sm/gpgsm.h (VALIDATE_FLAG_STEED): New.
* sm/gpgsm.c (gpgsm_parse_validation_model): Add model "steed".
* sm/server.c (option_handler): Allow validation model "steed".
* sm/certlist.c (gpgsm_cert_has_well_known_private_key): New.
* sm/certchain.c (do_validate_chain): Handle the
well-known-private-key attribute.  Support the "steed" model.
(gpgsm_validate_chain): Ditto.
* sm/verify.c (gpgsm_verify): Return "steed" in the trust status line.
* sm/keylist.c (list_cert_colon): Print the new 'w' flag.
--

This is the first part of changes to implement the STEED proposal as
described at http://g10code.com/steed.html .  The idea for X.509 is
not to use plain self-signed certificates but certificates signed by a
dummy CA (i.e. one for which the private key is known).  Having a
single CA as an indication for the use of STEED might help other X.509
implementations to implement STEED.

1 files changed, 16 insertions, 1 deletions

diff --git a/sm/certlist.c b/sm/certlist.c
index 0e9031953..241364a3a 100644
--- a/sm/certlist.c
+++ b/sm/certlist.c
@@ -1,6 +1,6 @@
 /* certlist.c - build list of certificates
  * Copyright (C) 2001, 2003, 2004, 2005, 2007,
- *               2008 Free Software Foundation, Inc.
+ *               2008, 2011 Free Software Foundation, Inc.
  *
  * This file is part of GnuPG.
  *
@@ -210,6 +210,21 @@ gpgsm_cert_use_ocsp_p (ksba_cert_t cert)
 }
 
 
+/* Return true if CERT has the well known private key extension.  */
+int
+gpgsm_cert_has_well_known_private_key (ksba_cert_t cert)
+{
+  int idx;
+  const char *oid;
+
+  for (idx=0; !ksba_cert_get_extension (cert, idx,
+                                        &oid, NULL, NULL, NULL);idx++)
+    if (!strcmp (oid, "1.3.6.1.4.1.11591.2.2.2") )
+      return 1; /* Yes.  */
+  return 0; /* No.  */
+}
+
+
 static int
 same_subject_issuer (const char *subject, const char *issuer, ksba_cert_t cert)
 {