From: Nikos Mavrogiannopoulos <nmav@gnutls.org>
Date: Fri, 19 Aug 2011 22:16:57 +0000 (+0200)
Subject: simplified PKCS #11 token example.
X-Git-Tag: gnutls_3_0_1~2^2~4
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=4475463407f2002c916330122cf640889ec696aa;p=thirdparty%2Fgnutls.git

simplified PKCS #11 token example.
---

diff --git a/doc/examples/ex-cert-select-pkcs11.c b/doc/examples/ex-cert-select-pkcs11.c
index 0bd032bf42..492cd5a8bf 100644
--- a/doc/examples/ex-cert-select-pkcs11.c
+++ b/doc/examples/ex-cert-select-pkcs11.c
@@ -28,57 +28,18 @@
 #define MIN(x,y) (((x)<(y))?(x):(y))
 
 #define CAFILE "ca.pem"
+
+/* The URLs of the objects can be obtained
+ * using p11tool --list-all --login
+ */
 #define KEY_URL "pkcs11:manufacturer=SomeManufacturer;object=Private%20Key" \
-  ";objecttype=private;id=db:5b:3e:b5:72:33"
+  ";objecttype=private;id=%db%5b%3e%b5%72%33"
 #define CERT_URL "pkcs11:manufacturer=SomeManufacturer;object=Certificate;" \
-  "objecttype=cert;id=db:5b:3e:b5:72:33"
+  "objecttype=cert;id=db%5b%3e%b5%72%33"
 
 extern int tcp_connect (void);
 extern void tcp_close (int sd);
 
-static int cert_callback (gnutls_session_t session,
-                          const gnutls_datum_t * req_ca_rdn, int nreqs,
-                          const gnutls_pk_algorithm_t * sign_algos,
-                          int sign_algos_length, gnutls_retr2_st * st);
-
-gnutls_x509_crt_t crt;
-gnutls_pkcs11_privkey_t key;
-
-/* Load the certificate and the private key.
- */
-static void
-load_keys (void)
-{
-  int ret;
-
-  gnutls_x509_crt_init (&crt);
-
-  ret = gnutls_x509_crt_import_pkcs11_url (crt, CERT_URL, 0);
-
-  /* some tokens require login to read data */
-  if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
-    ret = gnutls_x509_crt_import_pkcs11_url (crt, CERT_URL,
-                                             GNUTLS_PKCS11_OBJ_FLAG_LOGIN);
-
-  if (ret < 0)
-    {
-      fprintf (stderr, "*** Error loading key file: %s\n",
-               gnutls_strerror (ret));
-      exit (1);
-    }
-
-  gnutls_pkcs11_privkey_init (&key);
-
-  ret = gnutls_pkcs11_privkey_import_url (key, KEY_URL, 0);
-  if (ret < 0)
-    {
-      fprintf (stderr, "*** Error loading key file: %s\n",
-               gnutls_strerror (ret));
-      exit (1);
-    }
-
-}
-
 static int
 pin_callback (void *user, int attempt, const char *token_url,
               const char *token_label, unsigned int flags, char *pin,
@@ -93,6 +54,8 @@ pin_callback (void *user, int attempt, const char *token_url,
     printf ("*** This is the final try before locking!\n");
   if (flags & GNUTLS_PKCS11_PIN_COUNT_LOW)
     printf ("*** Only few tries left before locking!\n");
+  if (flags & GNUTLS_PKCS11_PIN_WRONG)
+    printf ("*** Wrong PIN\n");
 
   password = getpass ("Enter pin: ");
   if (password == NULL || password[0] == 0)
@@ -125,20 +88,17 @@ main (void)
    */
   gnutls_pkcs11_set_pin_function (pin_callback, NULL);
 
-  load_keys ();
-
   /* X509 stuff */
   gnutls_certificate_allocate_credentials (&xcred);
 
   /* priorities */
   gnutls_priority_init (&priorities_cache, "NORMAL", NULL);
 
-
   /* sets the trusted cas file
    */
   gnutls_certificate_set_x509_trust_file (xcred, CAFILE, GNUTLS_X509_FMT_PEM);
 
-  gnutls_certificate_set_retrieve_function (xcred, cert_callback);
+  gnutls_certificate_set_x509_key_file (xcred, CERT_URL, KEY_URL, GNUTLS_X509_FMT_DER);
 
   /* Initialize TLS session
    */
@@ -208,107 +168,3 @@ end:
 
   return 0;
 }
-
-
-
-/* This callback should be associated with a session by calling
- * gnutls_certificate_client_set_retrieve_function( session, cert_callback),
- * before a handshake.
- */
-
-static int
-cert_callback (gnutls_session_t session,
-               const gnutls_datum_t * req_ca_rdn, int nreqs,
-               const gnutls_pk_algorithm_t * sign_algos,
-               int sign_algos_length, gnutls_retr2_st * st)
-{
-  char issuer_dn[256];
-  int i, ret;
-  size_t len;
-  gnutls_certificate_type_t type;
-
-  /* Print the server's trusted CAs
-   */
-  if (nreqs > 0)
-    printf ("- Server's trusted authorities:\n");
-  else
-    printf ("- Server did not send us any trusted authorities names.\n");
-
-  /* print the names (if any) */
-  for (i = 0; i < nreqs; i++)
-    {
-      len = sizeof (issuer_dn);
-      ret = gnutls_x509_rdn_get (&req_ca_rdn[i], issuer_dn, &len);
-      if (ret >= 0)
-        {
-          printf ("   [%d]: ", i);
-          printf ("%s\n", issuer_dn);
-        }
-    }
-
-  /* Select a certificate and return it.
-   * The certificate must be of any of the "sign algorithms"
-   * supported by the server.
-   */
-
-  type = gnutls_certificate_type_get (session);
-  if (type == GNUTLS_CRT_X509)
-    {
-      /* check if the certificate we are sending is signed
-       * with an algorithm that the server accepts */
-      gnutls_sign_algorithm_t cert_algo, req_algo;
-      int i, match = 0;
-
-      ret = gnutls_x509_crt_get_signature_algorithm (crt);
-      if (ret < 0)
-        {
-          /* error reading signature algorithm
-           */
-          return -1;
-        }
-      cert_algo = ret;
-
-      i = 0;
-      do
-        {
-          ret = gnutls_sign_algorithm_get_requested (session, i, &req_algo);
-          if (ret >= 0 && cert_algo == req_algo)
-            {
-              match = 1;
-              break;
-            }
-
-          /* server has not requested anything specific */
-          if (i == 0 && ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
-            {
-              match = 1;
-              break;
-            }
-          i++;
-        }
-      while (ret >= 0);
-
-      if (match == 0)
-        {
-          printf
-            ("- Could not find a suitable certificate to send to server\n");
-          return -1;
-        }
-
-      st->cert_type = type;
-      st->ncerts = 1;
-
-      st->cert.x509 = &crt;
-      st->key.pkcs11 = key;
-      st->key_type = GNUTLS_PRIVKEY_PKCS11;
-
-      st->deinit_all = 0;
-    }
-  else
-    {
-      return -1;
-    }
-
-  return 0;
-
-}