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[empathy: 13/65] Add EmpathyTLSVerifier

commit 6a16791dc335fed6706352e1612893f312a80a3f
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Wed Aug 11 18:33:08 2010 +0200

    Add EmpathyTLSVerifier
    
    This also introduces a dependency on GnuTLS

 configure.ac                      |    1 +
 libempathy/Makefile.am            |    2 +
 libempathy/empathy-tls-verifier.c |  558 +++++++++++++++++++++++++++++++++++++
 libempathy/empathy-tls-verifier.h |   78 +++++
 src/empathy-auth-helper.c         |    9 +
 5 files changed, 648 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index dc21815..a09b476 100644
--- a/configure.ac
+++ b/configure.ac
@@ -153,6 +153,7 @@ PKG_CHECK_MODULES(EMPATHY,
    gio-2.0 >= $GLIB_REQUIRED
    gio-unix-2.0 >= $GLIB_REQUIRED
    gnome-keyring-1 >= $KEYRING_REQUIRED
+   gnutls
    gobject-2.0
    gstreamer-0.10
    gstreamer-interfaces-0.10
diff --git a/libempathy/Makefile.am b/libempathy/Makefile.am
index 7a1f16a..9b0dcfb 100644
--- a/libempathy/Makefile.am
+++ b/libempathy/Makefile.am
@@ -53,6 +53,7 @@ libempathy_headers =				\
 	empathy-status-presets.h		\
 	empathy-time.h				\
 	empathy-tls-certificate.h		\
+	empathy-tls-verifier.h			\
 	empathy-tp-call.h			\
 	empathy-tp-chat.h			\
 	empathy-tp-contact-factory.h		\
@@ -90,6 +91,7 @@ libempathy_la_SOURCES =					\
 	empathy-status-presets.c			\
 	empathy-time.c					\
 	empathy-tls-certificate.c			\
+	empathy-tls-verifier.c				\
 	empathy-tp-call.c				\
 	empathy-tp-chat.c				\
 	empathy-tp-contact-factory.c			\
diff --git a/libempathy/empathy-tls-verifier.c b/libempathy/empathy-tls-verifier.c
new file mode 100644
index 0000000..55688f9
--- /dev/null
+++ b/libempathy/empathy-tls-verifier.c
@@ -0,0 +1,558 @@
+/*
+ * empathy-tls-verifier.c - Source for EmpathyTLSVerifier
+ * Copyright (C) 2010 Collabora Ltd.
+ * @author Cosimo Cecchi <cosimo cecchi collabora co uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <config.h>
+
+#include <gnutls/gnutls.h>
+#include <gnutls/x509.h>
+
+#include <telepathy-glib/util.h>
+
+#include "empathy-tls-verifier.h"
+
+#define DEBUG_FLAG EMPATHY_DEBUG_TLS
+#include "empathy-debug.h"
+#include "empathy-utils.h"
+
+G_DEFINE_TYPE (EmpathyTLSVerifier, empathy_tls_verifier,
+    G_TYPE_OBJECT)
+
+#define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyTLSVerifier);
+
+enum {
+  PROP_TLS_CERTIFICATE = 1,
+  PROP_HOSTNAME,
+
+  LAST_PROPERTY,
+};
+
+static const gchar* system_ca_paths[] = {
+  "/etc/ssl/certs/ca-certificates.crt",
+  NULL,
+};
+
+typedef struct {
+  GPtrArray *cert_chain;
+
+  GPtrArray *trusted_ca_list;
+  GPtrArray *trusted_crl_list;
+
+  EmpathyTLSCertificate *certificate;
+  gchar *hostname;
+
+  GSimpleAsyncResult *verify_result;
+
+  gboolean dispose_run;
+} EmpathyTLSVerifierPriv;
+
+static gnutls_x509_crt_t *
+ptr_array_to_x509_crt_list (GPtrArray *chain)
+{
+  gnutls_x509_crt_t *retval;
+  gint idx;
+
+  retval = g_malloc0 (sizeof (gnutls_x509_crt_t) * chain->len);
+
+  for (idx = 0; idx < (gint) chain->len; idx++)
+    retval[idx] = g_ptr_array_index (chain, idx);
+
+  return retval;
+}
+
+static gboolean
+verification_output_to_reason (gint res,
+    guint verify_output,
+    EmpTLSCertificateRejectReason *reason)
+{
+  gboolean retval = TRUE;
+
+  if (res != GNUTLS_E_SUCCESS)
+    {
+      retval = FALSE;
+
+      /* the certificate is not structurally valid */
+      switch (res)
+        {
+        case GNUTLS_E_INSUFFICIENT_CREDENTIALS:
+          *reason = EMP_TLS_CERTIFICATE_REJECT_REASON_UNTRUSTED;
+          break;
+        case GNUTLS_E_CONSTRAINT_ERROR:
+          *reason = EMP_TLS_CERTIFICATE_REJECT_REASON_LIMIT_EXCEEDED;
+          break;
+        default:
+          *reason = EMP_TLS_CERTIFICATE_REJECT_REASON_UNKNOWN;
+          break;
+        }
+
+      goto out;
+    }
+
+  /* the certificate is structurally valid, check for other errors. */
+  if (verify_output & GNUTLS_CERT_INVALID)
+    {
+      retval = FALSE;
+
+      if (verify_output & GNUTLS_CERT_SIGNER_NOT_FOUND)
+        *reason = EMP_TLS_CERTIFICATE_REJECT_REASON_UNTRUSTED;
+      else if (verify_output & GNUTLS_CERT_SIGNER_NOT_CA)
+        *reason = EMP_TLS_CERTIFICATE_REJECT_REASON_SELF_SIGNED;
+      else if (verify_output & GNUTLS_CERT_INSECURE_ALGORITHM)
+        *reason = EMP_TLS_CERTIFICATE_REJECT_REASON_INSECURE;
+      else if (verify_output & GNUTLS_CERT_NOT_ACTIVATED)
+        *reason = EMP_TLS_CERTIFICATE_REJECT_REASON_NOT_ACTIVATED;
+      else if (verify_output & GNUTLS_CERT_EXPIRED)
+        *reason = EMP_TLS_CERTIFICATE_REJECT_REASON_EXPIRED;
+      else
+        *reason = EMP_TLS_CERTIFICATE_REJECT_REASON_UNKNOWN;
+
+      goto out;
+    }
+
+ out:
+  return retval;
+}
+
+static gboolean
+verify_last_certificate (EmpathyTLSVerifier *self,
+    gnutls_x509_crt_t cert,
+    EmpTLSCertificateRejectReason *reason)
+{
+  guint verify_output;
+  gint res;
+  gnutls_x509_crt_t *trusted_ca_list;
+  EmpathyTLSVerifierPriv *priv = GET_PRIV (self);
+
+  trusted_ca_list = ptr_array_to_x509_crt_list (priv->trusted_ca_list);
+  res = gnutls_x509_crt_verify (cert, trusted_ca_list,
+      priv->trusted_ca_list->len, 0, &verify_output);
+
+  g_free (trusted_ca_list);
+
+  return verification_output_to_reason (res, verify_output, reason);
+}
+
+static gboolean
+verify_certificate (EmpathyTLSVerifier *self,
+    gnutls_x509_crt_t cert,
+    gnutls_x509_crt_t issuer,
+    EmpTLSCertificateRejectReason *reason)
+{
+  guint verify_output;
+  gint res;
+
+  res = gnutls_x509_crt_verify (cert, &issuer, 1, 0, &verify_output);
+
+  return verification_output_to_reason (res, verify_output, reason);
+}
+
+static void
+complete_verification (EmpathyTLSVerifier *self)
+{
+  EmpathyTLSVerifierPriv *priv = GET_PRIV (self);
+
+  DEBUG ("Verification successful, completing...");
+
+  g_simple_async_result_complete_in_idle (priv->verify_result);
+
+  tp_clear_object (&priv->verify_result);  
+}
+
+static void
+abort_verification (EmpathyTLSVerifier *self,
+    EmpTLSCertificateRejectReason reason)
+{
+  EmpathyTLSVerifierPriv *priv = GET_PRIV (self);
+
+  DEBUG ("Verification error %u, aborting...", reason);
+
+  g_simple_async_result_set_error (priv->verify_result,
+      G_IO_ERROR, reason, "TLS verification failed with reason %u",
+      reason);
+  g_simple_async_result_complete_in_idle (priv->verify_result);
+
+  tp_clear_object (&priv->verify_result);
+}
+
+static void
+real_start_verification (EmpathyTLSVerifier *self)
+{
+  gnutls_x509_crt_t last_cert;
+  gint idx;
+  gboolean res = FALSE;
+  gint num_certs;
+  EmpTLSCertificateRejectReason reason =
+    EMP_TLS_CERTIFICATE_REJECT_REASON_UNKNOWN;
+  EmpathyTLSVerifierPriv *priv = GET_PRIV (self);
+
+  num_certs = priv->cert_chain->len;
+
+  DEBUG ("Starting verification");
+
+  if (priv->trusted_ca_list->len > 0)
+    {
+      /* if the last certificate is self-signed, ignore it, as we want to check
+       * the chain against our trusted CA list first.
+       */
+      last_cert = g_ptr_array_index (priv->cert_chain, num_certs - 1);
+
+      if (gnutls_x509_crt_check_issuer (last_cert, last_cert) > 0)
+        num_certs--;
+    }
+
+  for (idx = 1; idx < num_certs; idx++)
+    {
+      res = verify_certificate (self,
+          g_ptr_array_index (priv->cert_chain, idx -1),
+          g_ptr_array_index (priv->cert_chain, idx),
+          &reason);
+
+      DEBUG ("Certificate verification %d gave result %d with reason %u", idx,
+          res, reason);
+
+      if (!res)
+        {
+          abort_verification (self, reason);
+          return;
+        }
+    }
+
+  if (priv->trusted_ca_list->len > 0)
+    {
+      res = verify_last_certificate (self,
+          g_ptr_array_index (priv->cert_chain, num_certs),
+          &reason);
+    }
+
+  if (!res)
+    {
+      abort_verification (self, reason);
+      return;
+    }
+
+  complete_verification (self);
+}
+
+static gboolean
+start_verification (gpointer user_data)
+{
+  EmpathyTLSVerifier *self = user_data;
+
+  real_start_verification (self);
+
+  return FALSE;
+}
+
+static void
+build_gnutls_cert_list (EmpathyTLSVerifier *self)
+{
+  guint num_certs;
+  guint idx;
+  GPtrArray *certificate_data = NULL;
+  EmpathyTLSVerifierPriv *priv = GET_PRIV (self);
+
+  g_object_get (priv->certificate,
+      "cert-data", &certificate_data,
+      NULL);
+  num_certs = certificate_data->len;
+
+  priv->cert_chain = g_ptr_array_sized_new (num_certs);
+
+  for (idx = 0; idx < num_certs; idx++)
+    {
+      gnutls_x509_crt_t cert;
+      GArray *one_cert;
+      gnutls_datum_t datum = { NULL, 0 };
+
+      one_cert = g_ptr_array_index (certificate_data, idx);
+      datum.data = (guchar *) one_cert->data;
+      datum.size = one_cert->len;
+
+      gnutls_x509_crt_init (&cert);
+      gnutls_x509_crt_import (cert, &datum, GNUTLS_X509_FMT_DER);
+
+      g_ptr_array_add (priv->cert_chain, cert);
+    }
+}
+
+static gint
+get_number_and_type_of_certificates (gnutls_datum_t *datum,
+    gnutls_x509_crt_fmt_t *format)
+{
+  gnutls_x509_crt_t fake;
+  gint retval = 1;
+  gint res;
+
+  res = gnutls_x509_crt_list_import (&fake, (guint *) &retval, datum,
+      GNUTLS_X509_FMT_PEM, 0);
+
+  if (res == GNUTLS_E_SHORT_MEMORY_BUFFER || res > 0)
+    {
+      *format = GNUTLS_X509_FMT_PEM;
+      return retval;
+    }
+
+  /* try DER */
+  res = gnutls_x509_crt_list_import (&fake, (guint *) &retval, datum,
+      GNUTLS_X509_FMT_DER, 0);
+
+  if (res > 0)
+    {
+      *format = GNUTLS_X509_FMT_DER;
+      return retval;
+    }
+
+  return res;
+}
+
+static gboolean
+build_gnutls_ca_and_crl_lists (GIOSchedulerJob *job,
+    GCancellable *cancellable,
+    gpointer user_data)
+{
+  gint idx;
+  EmpathyTLSVerifier *self = user_data;
+  EmpathyTLSVerifierPriv *priv = GET_PRIV (self);
+
+  priv->trusted_ca_list = g_ptr_array_new ();
+
+  for (idx = 0; idx < (gint) G_N_ELEMENTS (system_ca_paths) - 1; idx++)
+    {
+      const gchar *path;
+      gchar *contents = NULL;
+      gsize length = 0;
+      gint res, n_certs;
+      gnutls_x509_crt_t *cert_list;
+      gnutls_datum_t datum = { NULL, 0 };
+      gnutls_x509_crt_fmt_t format = 0;
+      GError *error = NULL;
+
+      path = system_ca_paths[idx];
+      g_file_get_contents (path, &contents, &length, &error);
+
+      if (error != NULL)
+        {
+          DEBUG ("Unable to read system CAs from path %s", path);
+          g_error_free (error);
+          continue;
+        }
+
+      datum.data = (guchar *) contents;
+      datum.size = length;
+      n_certs = get_number_and_type_of_certificates (&datum, &format);
+
+      if (n_certs < 0)
+        {
+          DEBUG ("Unable to parse the system CAs from path %s: GnuTLS "
+              "returned error %d", path, n_certs);
+
+          g_free (contents);
+          continue;
+        }
+
+      cert_list = g_malloc0 (sizeof (gnutls_x509_crt_t) * n_certs);
+      res = gnutls_x509_crt_list_import (cert_list, (guint *) &n_certs, &datum,
+          format, 0);
+
+      if (res < 0)
+        {
+          DEBUG ("Unable to import system CAs from path %s; "
+              "GnuTLS returned error %d", path, res);
+
+          g_free (contents);
+          continue;
+        }
+
+      DEBUG ("Successfully imported %d system CA certificates from path %s",
+          n_certs, path);
+
+      /* append the newly created cert structutes into the global GPtrArray */
+      for (idx = 0; idx < n_certs; idx++)
+        g_ptr_array_add (priv->trusted_ca_list, cert_list[idx]);
+
+      g_free (contents);
+    }
+
+  /* TODO: do the CRL too */
+
+  g_io_scheduler_job_send_to_mainloop_async (job,
+      start_verification, self, NULL);
+
+  return FALSE;
+}
+
+static void
+empathy_tls_verifier_get_property (GObject *object,
+    guint property_id,
+    GValue *value,
+    GParamSpec *pspec)
+{
+  EmpathyTLSVerifierPriv *priv = GET_PRIV (object);
+
+  switch (property_id)
+    {
+    case PROP_TLS_CERTIFICATE:
+      g_value_set_object (value, priv->certificate);
+      break;
+    case PROP_HOSTNAME:
+      g_value_set_string (value, priv->hostname);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+empathy_tls_verifier_set_property (GObject *object,
+    guint property_id,
+    const GValue *value,
+    GParamSpec *pspec)
+{
+  EmpathyTLSVerifierPriv *priv = GET_PRIV (object);
+
+  switch (property_id)
+    {
+    case PROP_TLS_CERTIFICATE:
+      priv->certificate = g_value_dup_object (value);
+      break;
+    case PROP_HOSTNAME:
+      priv->hostname = g_value_dup_string (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+empathy_tls_verifier_dispose (GObject *object)
+{
+  EmpathyTLSVerifierPriv *priv = GET_PRIV (object);
+
+  if (priv->dispose_run)
+    return;
+
+  priv->dispose_run = TRUE;
+
+  tp_clear_object (&priv->certificate);
+
+  G_OBJECT_CLASS (empathy_tls_verifier_parent_class)->dispose (object);
+}
+
+static void
+empathy_tls_verifier_finalize (GObject *object)
+{
+  EmpathyTLSVerifierPriv *priv = GET_PRIV (object);
+
+  DEBUG ("%p", object);
+  
+  g_free (priv->hostname);
+
+  G_OBJECT_CLASS (empathy_tls_verifier_parent_class)->finalize (object);
+}
+
+static void
+empathy_tls_verifier_constructed (GObject *object)
+{
+  EmpathyTLSVerifier *self = EMPATHY_TLS_VERIFIER (object);
+
+  build_gnutls_cert_list (self);
+  
+  if (G_OBJECT_CLASS (empathy_tls_verifier_parent_class)->constructed != NULL)
+    G_OBJECT_CLASS (empathy_tls_verifier_parent_class)->constructed (object);
+}
+
+static void
+empathy_tls_verifier_init (EmpathyTLSVerifier *self)
+{
+  self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
+      EMPATHY_TYPE_TLS_VERIFIER, EmpathyTLSVerifierPriv);
+}
+
+static void
+empathy_tls_verifier_class_init (EmpathyTLSVerifierClass *klass)
+{
+  GParamSpec *pspec;
+  GObjectClass *oclass = G_OBJECT_CLASS (klass);
+
+  g_type_class_add_private (klass, sizeof (EmpathyTLSVerifierPriv));
+
+  oclass->set_property = empathy_tls_verifier_set_property;
+  oclass->get_property = empathy_tls_verifier_get_property;
+  oclass->finalize = empathy_tls_verifier_finalize;
+  oclass->dispose = empathy_tls_verifier_dispose;
+  oclass->constructed = empathy_tls_verifier_constructed;
+
+  pspec = g_param_spec_object ("certificate", "The EmpathyTLSCertificate",
+      "The EmpathyTLSCertificate to be verified.",
+      EMPATHY_TYPE_TLS_CERTIFICATE,
+      G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
+  g_object_class_install_property (oclass, PROP_TLS_CERTIFICATE, pspec);
+
+  pspec = g_param_spec_string ("hostname", "The hostname",
+      "The hostname which should be certified by the certificate.",
+      NULL,
+      G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
+  g_object_class_install_property (oclass, PROP_HOSTNAME, pspec);
+}
+
+EmpathyTLSVerifier *
+empathy_tls_verifier_new (EmpathyTLSCertificate *certificate,
+    const gchar *hostname)
+{
+  g_assert (EMPATHY_IS_TLS_CERTIFICATE (certificate));
+  g_assert (hostname != NULL);
+
+  return g_object_new (EMPATHY_TYPE_TLS_VERIFIER,
+      "certificate", certificate,
+      "hostname", hostname,
+      NULL);
+}
+
+void
+empathy_tls_verifier_verify_async (EmpathyTLSVerifier *self,
+    GAsyncReadyCallback callback,
+    gpointer user_data)
+{
+  EmpathyTLSVerifierPriv *priv = GET_PRIV (self);
+
+  priv->verify_result = g_simple_async_result_new (G_OBJECT (self),
+      callback, user_data, NULL);
+
+  g_io_scheduler_push_job (build_gnutls_ca_and_crl_lists,
+      self, NULL, G_PRIORITY_DEFAULT, NULL);
+}
+
+gboolean
+empathy_tls_verifier_verify_finish (EmpathyTLSVerifier *self,
+    GAsyncResult *res,
+    EmpTLSCertificateRejectReason *reason,
+    GError **error)
+{
+  if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (res),
+          error))
+    {
+      *reason = (*error)->code;
+      return FALSE;
+    }
+
+  *reason = EMP_TLS_CERTIFICATE_REJECT_REASON_UNKNOWN;
+  return TRUE;
+}
diff --git a/libempathy/empathy-tls-verifier.h b/libempathy/empathy-tls-verifier.h
new file mode 100644
index 0000000..b4cc1fc
--- /dev/null
+++ b/libempathy/empathy-tls-verifier.h
@@ -0,0 +1,78 @@
+/*
+ * empathy-tls-verifier.h - Header for EmpathyTLSVerifier
+ * Copyright (C) 2010 Collabora Ltd.
+ * @author Cosimo Cecchi <cosimo cecchi collabora co uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef __EMPATHY_TLS_VERIFIER_H__
+#define __EMPATHY_TLS_VERIFIER_H__
+
+#include <glib-object.h>
+#include <gio/gio.h>
+
+#include <libempathy/empathy-tls-certificate.h>
+
+#include <extensions/extensions.h>
+
+G_BEGIN_DECLS
+
+typedef struct _EmpathyTLSVerifier EmpathyTLSVerifier;
+typedef struct _EmpathyTLSVerifierClass EmpathyTLSVerifierClass;
+
+struct _EmpathyTLSVerifierClass {
+    GObjectClass parent_class;
+};
+
+struct _EmpathyTLSVerifier {
+    GObject parent;
+    gpointer priv;
+};
+
+GType empathy_tls_verifier_get_type (void);
+
+#define EMPATHY_TYPE_TLS_VERIFIER \
+  (empathy_tls_verifier_get_type ())
+#define EMPATHY_TLS_VERIFIER(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj), EMPATHY_TYPE_TLS_VERIFIER, \
+    EmpathyTLSVerifier))
+#define EMPATHY_TLS_VERIFIER_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass), EMPATHY_TYPE_TLS_VERIFIER, \
+  EmpathyTLSVerifierClass))
+#define EMPATHY_IS_TLS_VERIFIER(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj), EMPATHY_TYPE_TLS_VERIFIER))
+#define EMPATHY_IS_TLS_VERIFIER_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass), EMPATHY_TYPE_TLS_VERIFIER))
+#define EMPATHY_TLS_VERIFIER_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS ((obj), EMPATHY_TYPE_TLS_VERIFIER, \
+  EmpathyTLSVerifierClass))
+
+EmpathyTLSVerifier * empathy_tls_verifier_new (
+    EmpathyTLSCertificate *certificate,
+    const gchar *hostname);
+
+void empathy_tls_verifier_verify_async (EmpathyTLSVerifier *self,
+    GAsyncReadyCallback callback,
+    gpointer user_data);
+
+gboolean empathy_tls_verifier_verify_finish (EmpathyTLSVerifier *self,
+    GAsyncResult *res,
+    EmpTLSCertificateRejectReason *reason,
+    GError **error);
+
+G_END_DECLS
+
+#endif /* #ifndef __EMPATHY_TLS_VERIFIER_H__*/
diff --git a/src/empathy-auth-helper.c b/src/empathy-auth-helper.c
index db22327..aaee48e 100644
--- a/src/empathy-auth-helper.c
+++ b/src/empathy-auth-helper.c
@@ -38,7 +38,16 @@ auth_factory_new_handler_cb (EmpathyAuthFactory *factory,
     EmpathyServerTLSHandler *handler,
     gpointer user_data)
 {
+  EmpathyTLSCertificate *certificate;
+
   DEBUG ("New TLS server handler received from the factory");
+
+  certificate = g_object_ref (
+      empathy_server_tls_handler_get_certificate (handler));
+
+  empathy_tls_certificate_accept (certificate);
+
+  g_object_unref (certificate);
 }
 
 int
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