Changeset ae29683 in mod_gnutls for src/gnutls_hooks.c

Timestamp:

Feb 21, 2014, 12:15:56 AM (6 years ago)

Author:

Daniel Kahn Gillmor <dkg@…>

Branches:

debian/master, debian/stretch-backports, jessie-backports, upstream

Children:

4addf74, 62f781c

Parents:

180e49f (diff), 1a99240 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Imported Upstream version 0.6

File:

• src/gnutls_hooks.c (modified) (6 diffs)

src/gnutls_hooks.c

@@ -1 +1 @@
 /**
  *  Copyright 2004-2005 Paul Querna
- *  Copyright 2007 Nikos Mavrogiannopoulos
+ *  Copyright 2008 Nikos Mavrogiannopoulos
+ *  Copyright 2011 Dash Shendy
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
@@ -20 +21 @@
 #include "http_vhost.h"
 #include "ap_mpm.h"
-
-#if APR_HAS_THREADS
-# if GNUTLS_VERSION_MAJOR <= 2 && GNUTLS_VERSION_MINOR < 11
-#include <gcrypt.h>
-GCRY_THREAD_OPTION_PTHREAD_IMPL;
-# endif
+#include "mod_status.h"
+
+#ifdef ENABLE_MSVA
+#include <msv/msv.h>
 #endif
 
@@ -36 +35 @@
 #endif
 
-static int mpm_is_threaded;
-static gnutls_datum session_ticket_key = { NULL, 0 };
+static gnutls_datum_t session_ticket_key = {NULL, 0};
 
 static int mgs_cert_verify(request_rec * r, mgs_handle_t * ctxt);
 /* use side==0 for server and side==1 for client */
-static void mgs_add_common_cert_vars(request_rec * r,
-                                     gnutls_x509_crt_t cert, int side,
-                                     int export_certificates_enabled);
-static void mgs_add_common_pgpcert_vars(request_rec * r,
-                                        gnutls_openpgp_crt_t cert,
-                                        int side,
-                                        int export_certificates_enabled);
-
-static apr_status_t mgs_cleanup_pre_config(void *data)
-{
-        gnutls_free(session_ticket_key.data);
-        session_ticket_key.data = NULL;
-        session_ticket_key.size = 0;
-        gnutls_global_deinit();
-        return APR_SUCCESS;
-}
-
+static void mgs_add_common_cert_vars(request_rec * r, gnutls_x509_crt_t cert, int side, int export_full_cert);
+static void mgs_add_common_pgpcert_vars(request_rec * r, gnutls_openpgp_crt_t cert, int side, int export_full_cert);
+static const char* mgs_x509_construct_uid(request_rec * pool, gnutls_x509_crt_t cert);
+static int mgs_status_hook(request_rec *r, int flags);
+
+/* Pool Cleanup Function */
+apr_status_t mgs_cleanup_pre_config(void *data) {
+        /* Free all session data */
+    gnutls_free(session_ticket_key.data);
+    session_ticket_key.data = NULL;
+    session_ticket_key.size = 0;
+        /* Deinitialize GnuTLS Library */
+    gnutls_global_deinit();
+    return APR_SUCCESS;
+}
+
+/* Logging Function for Maintainers */
 #if MOD_GNUTLS_DEBUG
-static void gnutls_debug_log_all(int level, const char *str)
-{
-        apr_file_printf(debug_log_fp, "<%d> %s\n", level, str);
-}
-
+static void gnutls_debug_log_all(int level, const char *str) {
+    apr_file_printf(debug_log_fp, "<%d> %s", level, str);
+}
 #define _gnutls_log apr_file_printf
 #else
-# define _gnutls_log(...)
+#define _gnutls_log(...)
 #endif
 
-int
-mgs_hook_pre_config(apr_pool_t * pconf,
-                    apr_pool_t * plog, apr_pool_t * ptemp)
-{
-        int ret;
-
+static const char* mgs_readable_cvm(mgs_client_verification_method_e m) {
+    switch(m) {
+    case mgs_cvm_unset:
+        return "unset";
+    case mgs_cvm_cartel:
+        return "cartel";
+    case mgs_cvm_msva:
+        return "msva";
+    }
+    return "unknown";
+}
+
+/* Pre-Configuration HOOK: Runs First */
+int mgs_hook_pre_config(apr_pool_t * pconf, apr_pool_t * plog, apr_pool_t * ptemp) {
+
+/* Maintainer Logging */
 #if MOD_GNUTLS_DEBUG
-        apr_file_open(&debug_log_fp, "/tmp/gnutls_debug",
-                      APR_APPEND | APR_WRITE | APR_CREATE, APR_OS_DEFAULT,
-                      pconf);
+    apr_file_open(&debug_log_fp, "/tmp/gnutls_debug", APR_APPEND | APR_WRITE | APR_CREATE, APR_OS_DEFAULT, pconf);
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    gnutls_global_set_log_level(9);
+    gnutls_global_set_log_function(gnutls_debug_log_all);
+    _gnutls_log(debug_log_fp, "gnutls: %s\n", gnutls_check_version(NULL));
+#endif
+
+    int ret;
+
+        /* Check for required GnuTLS Library Version */
+    if (gnutls_check_version(LIBGNUTLS_VERSION) == NULL) {
+                ap_log_perror(APLOG_MARK, APLOG_EMERG, 0, plog, "gnutls_check_version() failed. Required: "
+                                        "gnutls-%s Found: gnutls-%s", LIBGNUTLS_VERSION, gnutls_check_version(NULL));
+        return DONE;
+    }
+
+        /* Initialize GnuTLS Library */
+    ret = gnutls_global_init();
+    if (ret < 0) {
+                ap_log_perror(APLOG_MARK, APLOG_EMERG, 0, plog, "gnutls_global_init: %s", gnutls_strerror(ret));
+                return DONE;
+    }
+
+        /* Generate a Session Key */
+    ret = gnutls_session_ticket_key_generate(&session_ticket_key);
+    if (ret < 0) {
+                ap_log_perror(APLOG_MARK, APLOG_EMERG, 0, plog, "gnutls_session_ticket_key_generate: %s", gnutls_strerror(ret));
+                return DONE;
+    }
+
+    AP_OPTIONAL_HOOK(status_hook, mgs_status_hook, NULL, NULL, APR_HOOK_MIDDLE);
+
+        /* Register a pool clean-up function */
+    apr_pool_cleanup_register(pconf, NULL, mgs_cleanup_pre_config, apr_pool_cleanup_null);
+
+    return OK;
+}
+
+static int mgs_select_virtual_server_cb(gnutls_session_t session) {
+
+    mgs_handle_t *ctxt = NULL;
+    mgs_srvconf_rec *tsc = NULL;
+    int ret = 0;
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+
+    ctxt = gnutls_transport_get_ptr(session);
+
+    /* find the virtual server */
+    tsc = mgs_find_sni_server(session);
+
+    if (tsc != NULL) {
+        // Found a TLS vhost based on the SNI from the client; use it instead.
+        ctxt->sc = tsc;
+        }
+
+    gnutls_certificate_server_set_request(session, ctxt->sc->client_verify_mode);
+
+    /* Set Anon credentials */
+    gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, ctxt->sc->certs);
+        /* Set x509 credentials */
+    gnutls_credentials_set(session, GNUTLS_CRD_ANON, ctxt->sc->anon_creds);
+
+#ifdef ENABLE_SRP
+        /* Set SRP credentials */
+    if (ctxt->sc->srp_tpasswd_conf_file != NULL && ctxt->sc->srp_tpasswd_file != NULL) {
+        gnutls_credentials_set(session, GNUTLS_CRD_SRP, ctxt->sc->srp_creds);
+    }
+#endif
+
+    /* update the priorities - to avoid negotiating a ciphersuite that is not
+     * enabled on this virtual server. Note that here we ignore the version
+     * negotiation.
+     */
+
+    ret = gnutls_priority_set(session, ctxt->sc->priorities);
+    /* actually it shouldn't fail since we have checked at startup */
+    return ret;
+
+}
+
+static int cert_retrieve_fn(gnutls_session_t session,
+                                                        const gnutls_datum_t * req_ca_rdn, int nreqs,
+                                                        const gnutls_pk_algorithm_t * pk_algos, int pk_algos_length,
+                                                        gnutls_retr2_st *ret) {
+
 
         _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
 
-        gnutls_global_set_log_level(9);
-        gnutls_global_set_log_function(gnutls_debug_log_all);
-        _gnutls_log(debug_log_fp, "gnutls: %s\n",
-                    gnutls_check_version(NULL));
-#endif
-
-#if APR_HAS_THREADS
-        ap_mpm_query(AP_MPMQ_IS_THREADED, &mpm_is_threaded);
-#if (GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR < 11) || GNUTLS_VERSION_MAJOR < 2
-        if (mpm_is_threaded) {
-                gcry_control(GCRYCTL_SET_THREAD_CBS,
-                             &gcry_threads_pthread);
+        mgs_handle_t *ctxt;
+
+    if (session == NULL) {
+                // ERROR INVALID SESSION
+                ret->ncerts = 0;
+                ret->deinit_all = 1;
+        return -1;
         }
-#endif
-#else
-        mpm_is_threaded = 0;
-#endif
-
-
-        if (gnutls_check_version(LIBGNUTLS_VERSION) == NULL) {
-                _gnutls_log(debug_log_fp,
-                            "gnutls_check_version() failed. Required: gnutls-%s Found: gnutls-%s\n",
-                            LIBGNUTLS_VERSION, gnutls_check_version(NULL));
-                return -3;
+    ctxt = gnutls_transport_get_ptr(session);
+
+    if (gnutls_certificate_type_get(session) == GNUTLS_CRT_X509) {
+                // X509 CERTIFICATE
+                ret->cert_type = GNUTLS_CRT_X509;
+                ret->key_type = GNUTLS_PRIVKEY_X509;
+        ret->ncerts = ctxt->sc->certs_x509_chain_num;
+        ret->deinit_all = 0;
+        ret->cert.x509 = ctxt->sc->certs_x509_chain;
+        ret->key.x509 = ctxt->sc->privkey_x509;
+        return 0;
+    } else if (gnutls_certificate_type_get(session) == GNUTLS_CRT_OPENPGP) {
+                // OPENPGP CERTIFICATE
+                ret->cert_type = GNUTLS_CRT_OPENPGP;
+                ret->key_type = GNUTLS_PRIVKEY_OPENPGP;
+        ret->ncerts = 1;
+        ret->deinit_all = 0;
+        ret->cert.pgp = ctxt->sc->cert_pgp;
+        ret->key.pgp = ctxt->sc->privkey_pgp;
+        return 0;
+    } else {
+                // UNKNOWN CERTIFICATE
+                ret->ncerts = 0;
+                ret->deinit_all = 1;
+            return -1;
         }
-
-        ret = gnutls_global_init();
-        if (ret < 0) {
-                _gnutls_log(debug_log_fp, "gnutls_global_init: %s\n",
-                            gnutls_strerror(ret));
-                return -3;
-        }
-
-        ret = gnutls_session_ticket_key_generate(&session_ticket_key);
-        if (ret < 0) {
-                _gnutls_log(debug_log_fp,
-                            "gnutls_session_ticket_key_generate: %s\n",
-                            gnutls_strerror(ret));
-        }
-
-        apr_pool_cleanup_register(pconf, NULL, mgs_cleanup_pre_config,
-                                  apr_pool_cleanup_null);
-
-
-        return OK;
-}
-
-static int mgs_select_virtual_server_cb(gnutls_session_t session)
-{
-        mgs_handle_t *ctxt;
-        mgs_srvconf_rec *tsc;
-        int ret;
-        int cprio[2];
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-
-        ctxt = gnutls_transport_get_ptr(session);
-
-        /* find the virtual server */
-        tsc = mgs_find_sni_server(session);
-
-        if (tsc != NULL)
-                ctxt->sc = tsc;
-
-        gnutls_certificate_server_set_request(session,
-                                              ctxt->
-                                              sc->client_verify_mode);
-
-        /* set the new server credentials 
-         */
-
-        gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
-                               ctxt->sc->certs);
-
-        gnutls_credentials_set(session, GNUTLS_CRD_ANON,
-                               ctxt->sc->anon_creds);
-
-#ifdef ENABLE_SRP
-        if (ctxt->sc->srp_tpasswd_conf_file != NULL
-            && ctxt->sc->srp_tpasswd_file != NULL) {
-                gnutls_credentials_set(session, GNUTLS_CRD_SRP,
-                                       ctxt->sc->srp_creds);
-        }
-#endif
-
-        /* update the priorities - to avoid negotiating a ciphersuite that is not
-         * enabled on this virtual server. Note that here we ignore the version
-         * negotiation.
-         */
-        ret = gnutls_priority_set(session, ctxt->sc->priorities);
-        /* actually it shouldn't fail since we have checked at startup */
-        if (ret < 0)
-                return ret;
-
-        /* If both certificate types are not present disallow them from
-         * being negotiated.
-         */
-        if (ctxt->sc->certs_x509[0] != NULL && ctxt->sc->cert_pgp == NULL) {
-                cprio[0] = GNUTLS_CRT_X509;
-                cprio[1] = 0;
-                gnutls_certificate_type_set_priority(session, cprio);
-        } else if (ctxt->sc->cert_pgp != NULL
-                   && ctxt->sc->certs_x509[0] == NULL) {
-                cprio[0] = GNUTLS_CRT_OPENPGP;
-                cprio[1] = 0;
-                gnutls_certificate_type_set_priority(session, cprio);
-        }
-
-        return 0;
-}
-
-static int cert_retrieve_fn(gnutls_session_t session, gnutls_retr_st * ret)
-{
-        mgs_handle_t *ctxt;
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        ctxt = gnutls_transport_get_ptr(session);
-
-        if (ctxt == NULL)
-                return GNUTLS_E_INTERNAL_ERROR;
-
-        if (gnutls_certificate_type_get(session) == GNUTLS_CRT_X509) {
-                ret->type = GNUTLS_CRT_X509;
-                ret->ncerts = ctxt->sc->certs_x509_num;
-                ret->deinit_all = 0;
-
-                ret->cert.x509 = ctxt->sc->certs_x509;
-                ret->key.x509 = ctxt->sc->privkey_x509;
-
-                return 0;
-        } else if (gnutls_certificate_type_get(session) ==
-                   GNUTLS_CRT_OPENPGP) {
-                ret->type = GNUTLS_CRT_OPENPGP;
-                ret->ncerts = 1;
-                ret->deinit_all = 0;
-
-                ret->cert.pgp = ctxt->sc->cert_pgp;
-                ret->key.pgp = ctxt->sc->privkey_pgp;
-
-                return 0;
-
-        }
-
-        return GNUTLS_E_INTERNAL_ERROR;
 }
 
 /* 2048-bit group parameters from SRP specification */
 const char static_dh_params[] = "-----BEGIN DH PARAMETERS-----\n"
-    "MIIBBwKCAQCsa9tBMkqam/Fm3l4TiVgvr3K2ZRmH7gf8MZKUPbVgUKNzKcu0oJnt\n"
-    "gZPgdXdnoT3VIxKrSwMxDc1/SKnaBP1Q6Ag5ae23Z7DPYJUXmhY6s2YaBfvV+qro\n"
-    "KRipli8Lk7hV+XmT7Jde6qgNdArb9P90c1nQQdXDPqcdKB5EaxR3O8qXtDoj+4AW\n"
-    "dr0gekNsZIHx0rkHhxdGGludMuaI+HdIVEUjtSSw1X1ep3onddLs+gMs+9v1L7N4\n"
-    "YWAnkATleuavh05zA85TKZzMBBx7wwjYKlaY86jQw4JxrjX46dv7tpS1yAPYn3rk\n"
-    "Nd4jbVJfVHWbZeNy/NaO8g+nER+eSv9zAgEC\n"
-    "-----END DH PARAMETERS-----\n";
+        "MIIBBwKCAQCsa9tBMkqam/Fm3l4TiVgvr3K2ZRmH7gf8MZKUPbVgUKNzKcu0oJnt\n"
+        "gZPgdXdnoT3VIxKrSwMxDc1/SKnaBP1Q6Ag5ae23Z7DPYJUXmhY6s2YaBfvV+qro\n"
+        "KRipli8Lk7hV+XmT7Jde6qgNdArb9P90c1nQQdXDPqcdKB5EaxR3O8qXtDoj+4AW\n"
+        "dr0gekNsZIHx0rkHhxdGGludMuaI+HdIVEUjtSSw1X1ep3onddLs+gMs+9v1L7N4\n"
+        "YWAnkATleuavh05zA85TKZzMBBx7wwjYKlaY86jQw4JxrjX46dv7tpS1yAPYn3rk\n"
+        "Nd4jbVJfVHWbZeNy/NaO8g+nER+eSv9zAgEC\n"
+        "-----END DH PARAMETERS-----\n";
 
 /* Read the common name or the alternative name of the certificate.
@@ -243 +222 @@
  * Returns negative on error.
  */
-static int read_crt_cn(server_rec * s, apr_pool_t * p,
-                       gnutls_x509_crt_t cert, char **cert_cn)
-{
-        int rv = 0, i;
-        size_t data_len;
-
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        *cert_cn = NULL;
-
-        data_len = 0;
-        rv = gnutls_x509_crt_get_dn_by_oid(cert,
-                                           GNUTLS_OID_X520_COMMON_NAME,
-                                           0, 0, NULL, &data_len);
-
-        if (rv == GNUTLS_E_SHORT_MEMORY_BUFFER && data_len > 1) {
-                *cert_cn = apr_palloc(p, data_len);
-                rv = gnutls_x509_crt_get_dn_by_oid(cert,
-                                                   GNUTLS_OID_X520_COMMON_NAME,
-                                                   0, 0, *cert_cn,
-                                                   &data_len);
-        } else {                /* No CN return subject alternative name */
-                ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
-                             "No common name found in certificate for '%s:%d'. Looking for subject alternative name...",
-                             s->server_hostname, s->port);
-                rv = 0;
-                /* read subject alternative name */
-                for (i = 0; !(rv < 0); i++) {
-                        data_len = 0;
-                        rv = gnutls_x509_crt_get_subject_alt_name(cert, i,
-                                                                  NULL,
-                                                                  &data_len,
-                                                                  NULL);
-
-                        if (rv == GNUTLS_E_SHORT_MEMORY_BUFFER
-                            && data_len > 1) {
-                                /* FIXME: not very efficient. What if we have several alt names
-                                 * before DNSName?
-                                 */
-                                *cert_cn = apr_palloc(p, data_len + 1);
-
-                                rv = gnutls_x509_crt_get_subject_alt_name
-                                    (cert, i, *cert_cn, &data_len, NULL);
-                                (*cert_cn)[data_len] = 0;
-
-                                if (rv == GNUTLS_SAN_DNSNAME)
-                                        break;
+static int read_crt_cn(server_rec * s, apr_pool_t * p, gnutls_x509_crt_t cert, char **cert_cn) {
+
+    int rv = 0, i;
+    size_t data_len;
+
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    *cert_cn = NULL;
+
+    data_len = 0;
+    rv = gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME, 0, 0, NULL, &data_len);
+
+    if (rv == GNUTLS_E_SHORT_MEMORY_BUFFER && data_len > 1) {
+        *cert_cn = apr_palloc(p, data_len);
+        rv = gnutls_x509_crt_get_dn_by_oid(cert,
+                GNUTLS_OID_X520_COMMON_NAME,
+                0, 0, *cert_cn,
+                &data_len);
+    } else { /* No CN return subject alternative name */
+        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
+                "No common name found in certificate for '%s:%d'. Looking for subject alternative name...",
+                s->server_hostname, s->port);
+        rv = 0;
+        /* read subject alternative name */
+        for (i = 0; !(rv < 0); i++) {
+            data_len = 0;
+            rv = gnutls_x509_crt_get_subject_alt_name(cert, i,
+                    NULL,
+                    &data_len,
+                    NULL);
+
+            if (rv == GNUTLS_E_SHORT_MEMORY_BUFFER
+                    && data_len > 1) {
+                /* FIXME: not very efficient. What if we have several alt names
+                 * before DNSName?
+                 */
+                *cert_cn = apr_palloc(p, data_len + 1);
+
+                rv = gnutls_x509_crt_get_subject_alt_name
+                        (cert, i, *cert_cn, &data_len, NULL);
+                (*cert_cn)[data_len] = 0;
+
+                if (rv == GNUTLS_SAN_DNSNAME)
+                    break;
+            }
+        }
+    }
+
+    return rv;
+}
+
+static int read_pgpcrt_cn(server_rec * s, apr_pool_t * p,
+        gnutls_openpgp_crt_t cert, char **cert_cn) {
+    int rv = 0;
+    size_t data_len;
+
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    *cert_cn = NULL;
+
+    data_len = 0;
+    rv = gnutls_openpgp_crt_get_name(cert, 0, NULL, &data_len);
+
+    if (rv == GNUTLS_E_SHORT_MEMORY_BUFFER && data_len > 1) {
+        *cert_cn = apr_palloc(p, data_len);
+        rv = gnutls_openpgp_crt_get_name(cert, 0, *cert_cn,
+                &data_len);
+    } else { /* No CN return subject alternative name */
+        ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
+                "No name found in PGP certificate for '%s:%d'.",
+                s->server_hostname, s->port);
+    }
+
+    return rv;
+}
+
+int mgs_hook_post_config(apr_pool_t * p, apr_pool_t * plog, apr_pool_t * ptemp, server_rec * base_server) {
+
+    int rv;
+    server_rec *s;
+    gnutls_dh_params_t dh_params = NULL;
+    mgs_srvconf_rec *sc;
+    mgs_srvconf_rec *sc_base;
+    void *data = NULL;
+    const char *userdata_key = "mgs_init";
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+
+    apr_pool_userdata_get(&data, userdata_key, base_server->process->pool);
+    if (data == NULL) {
+        apr_pool_userdata_set((const void *) 1, userdata_key, apr_pool_cleanup_null, base_server->process->pool);
+    }
+
+
+    s = base_server;
+    sc_base = (mgs_srvconf_rec *) ap_get_module_config(s->module_config, &gnutls_module);
+
+    gnutls_dh_params_init(&dh_params);
+
+    if (sc_base->dh_params == NULL) {
+        gnutls_datum_t pdata = {
+            (void *) static_dh_params,
+            sizeof(static_dh_params)
+        };
+        rv = gnutls_dh_params_import_pkcs3(dh_params, &pdata, GNUTLS_X509_FMT_PEM);
+        /* Generate DH Params
+        int dh_bits = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH,
+                GNUTLS_SEC_PARAM_NORMAL);
+        ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s,
+            "GnuTLS: Generating DH Params of %i bits.  "
+            "To avoid this use GnuTLSDHFile to specify DH Params for this host",
+            dh_bits);
+#if MOD_GNUTLS_DEBUG
+            ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
+                    "GnuTLS: Generated DH Params of %i bits",dh_bits);
+#endif
+        rv = gnutls_dh_params_generate2 (dh_params,dh_bits);
+        */
+        if (rv < 0) {
+            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s,
+                    "GnuTLS: Unable to generate or load DH Params: (%d) %s",
+                    rv, gnutls_strerror(rv));
+            exit(rv);
+        }
+    } else {
+        dh_params = sc_base->dh_params;
+    }
+
+    rv = mgs_cache_post_config(p, s, sc_base);
+    if (rv != 0) {
+        ap_log_error(APLOG_MARK, APLOG_STARTUP, rv, s,
+                "GnuTLS: Post Config for GnuTLSCache Failed."
+                " Shutting Down.");
+        exit(-1);
+    }
+
+    for (s = base_server; s; s = s->next) {
+        sc = (mgs_srvconf_rec *) ap_get_module_config(s->module_config, &gnutls_module);
+        sc->cache_type = sc_base->cache_type;
+        sc->cache_config = sc_base->cache_config;
+        sc->cache_timeout = sc_base->cache_timeout;
+
+        /* defaults for unset values: */
+        if (sc->enabled == GNUTLS_ENABLED_UNSET)
+            sc->enabled = GNUTLS_ENABLED_FALSE;
+        if (sc->tickets == GNUTLS_ENABLED_UNSET)
+            sc->tickets = GNUTLS_ENABLED_TRUE;
+        if (sc->export_certificates_enabled == GNUTLS_ENABLED_UNSET)
+            sc->export_certificates_enabled = GNUTLS_ENABLED_FALSE;
+        if (sc->client_verify_mode ==  -1)
+            sc->client_verify_mode = GNUTLS_CERT_IGNORE;
+        if (sc->client_verify_method ==  mgs_cvm_unset)
+            sc->client_verify_method = mgs_cvm_cartel;
+
+
+        /* Check if the priorities have been set */
+        if (sc->priorities == NULL && sc->enabled == GNUTLS_ENABLED_TRUE) {
+            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s,
+                    "GnuTLS: Host '%s:%d' is missing the GnuTLSPriorities directive!",
+                    s->server_hostname, s->port);
+            exit(-1);
+        }
+
+        /* Check if DH params have been set per host */
+        if (sc->dh_params != NULL) {
+            gnutls_certificate_set_dh_params(sc->certs, sc->dh_params);
+            gnutls_anon_set_server_dh_params(sc->anon_creds, sc->dh_params);
+        } else if (dh_params) {
+            gnutls_certificate_set_dh_params(sc->certs, dh_params);
+            gnutls_anon_set_server_dh_params(sc->anon_creds, dh_params);
+        }
+
+        gnutls_certificate_set_retrieve_function(sc->certs, cert_retrieve_fn);
+
+#ifdef ENABLE_SRP
+        if (sc->srp_tpasswd_conf_file != NULL
+                && sc->srp_tpasswd_file != NULL) {
+            rv = gnutls_srp_set_server_credentials_file
+                    (sc->srp_creds, sc->srp_tpasswd_file,
+                    sc->srp_tpasswd_conf_file);
+
+            if (rv < 0 && sc->enabled == GNUTLS_ENABLED_TRUE) {
+                ap_log_error(APLOG_MARK, APLOG_STARTUP, 0,
+                        s,
+                        "[GnuTLS] - Host '%s:%d' is missing a "
+                        "SRP password or conf File!",
+                        s->server_hostname, s->port);
+                exit(-1);
+            }
+        }
+#endif
+
+        if ((sc->certs_x509_chain == NULL || sc->certs_x509_chain_num < 1) &&
+            sc->cert_pgp == NULL && sc->enabled == GNUTLS_ENABLED_TRUE) {
+                        ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s,
+                                                "[GnuTLS] - Host '%s:%d' is missing a Certificate File!",
+                                                s->server_hostname, s->port);
+            exit(-1);
+        }
+
+        if (sc->enabled == GNUTLS_ENABLED_TRUE &&
+            ((sc->certs_x509_chain != NULL && sc->certs_x509_chain_num > 0 && sc->privkey_x509 == NULL) ||
+             (sc->cert_pgp != NULL && sc->privkey_pgp == NULL))) {
+                        ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s,
+                                                "[GnuTLS] - Host '%s:%d' is missing a Private Key File!",
+                                                s->server_hostname, s->port);
+            exit(-1);
+        }
+
+        if (sc->enabled == GNUTLS_ENABLED_TRUE) {
+            rv = -1;
+            if (sc->certs_x509_chain_num > 0) {
+                rv = read_crt_cn(s, p, sc->certs_x509_chain[0], &sc->cert_cn);
+            }
+            if (rv < 0 && sc->cert_pgp != NULL) {
+                rv = read_pgpcrt_cn(s, p, sc->cert_pgp, &sc->cert_cn);
+                        }
+
+            if (rv < 0) {
+                ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s,
+                                                        "[GnuTLS] - Cannot find a certificate for host '%s:%d'!",
+                                                        s->server_hostname, s->port);
+                sc->cert_cn = NULL;
+                continue;
+            }
+        }
+    }
+
+
+    ap_add_version_component(p, "mod_gnutls/" MOD_GNUTLS_VERSION);
+
+    {
+        const char* libvers = gnutls_check_version(NULL);
+        char* gnutls_version = NULL;
+        if(libvers && (gnutls_version = apr_psprintf(p, "GnuTLS/%s", libvers))) {
+            ap_add_version_component(p, gnutls_version);
+        } else {
+            // In case we could not create the above string go for the static version instead
+            ap_add_version_component(p, "GnuTLS/" GNUTLS_VERSION "-static");
+        }
+    }
+
+    return OK;
+}
+
+void mgs_hook_child_init(apr_pool_t * p, server_rec * s) {
+    apr_status_t rv = APR_SUCCESS;
+    mgs_srvconf_rec *sc = ap_get_module_config(s->module_config,
+            &gnutls_module);
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    if (sc->cache_type != mgs_cache_none) {
+        rv = mgs_cache_child_init(p, s, sc);
+        if (rv != APR_SUCCESS) {
+            ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
+                    "[GnuTLS] - Failed to run Cache Init");
+        }
+    }
+    /* Block SIGPIPE Signals */
+    rv = apr_signal_block(SIGPIPE);
+    if(rv != APR_SUCCESS) {
+        /* error sending output */
+        ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
+                "GnuTLS: Error Blocking SIGPIPE Signal!");
+    }
+}
+
+const char *mgs_hook_http_scheme(const request_rec * r) {
+    mgs_srvconf_rec *sc;
+
+    if (r == NULL)
+        return NULL;
+
+    sc = (mgs_srvconf_rec *) ap_get_module_config(r->
+            server->module_config,
+            &gnutls_module);
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    if (sc->enabled == GNUTLS_ENABLED_FALSE) {
+        return NULL;
+    }
+
+    return "https";
+}
+
+apr_port_t mgs_hook_default_port(const request_rec * r) {
+    mgs_srvconf_rec *sc;
+
+    if (r == NULL)
+        return 0;
+
+    sc = (mgs_srvconf_rec *) ap_get_module_config(r->
+            server->module_config,
+            &gnutls_module);
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    if (sc->enabled == GNUTLS_ENABLED_FALSE) {
+        return 0;
+    }
+
+    return 443;
+}
+
+#define MAX_HOST_LEN 255
+
+#if USING_2_1_RECENT
+
+typedef struct {
+    mgs_handle_t *ctxt;
+    mgs_srvconf_rec *sc;
+    const char *sni_name;
+} vhost_cb_rec;
+
+/**
+ * Matches the current vhost's ServerAlias directives
+ *
+ * @param x vhost callback record
+ * @param s server record
+ * @return true if a match, false otherwise
+ *
+ */
+int check_server_aliases(vhost_cb_rec *x, server_rec * s, mgs_srvconf_rec *tsc) {
+        apr_array_header_t *names;
+        int i,rv = 0;
+        char ** name;
+
+        /* Check ServerName First! */
+        if(apr_strnatcasecmp(x->sni_name, s->server_hostname) == 0) {
+                // We have a match, save this server configuration
+                x->sc = tsc;
+                rv = 1;
+        /* Check any ServerAlias directives */
+        } else if(s->names->nelts) {
+                names = s->names;
+                name = (char **)names->elts;
+                for (i = 0; i < names->nelts; ++i) {
+                        if (!name[i]) { continue; }
+                                if (apr_strnatcasecmp(x->sni_name, name[i]) == 0) {
+                                        // We have a match, save this server configuration
+                                        x->sc = tsc;
+                                        rv = 1;
+                        }
+                }
+        /* Wild any ServerAlias Directives */
+        } else if(s->wild_names->nelts) {
+                names = s->wild_names;
+        name = (char **)names->elts;
+                for (i = 0; i < names->nelts; ++i) {
+                        if (!name[i]) { continue; }
+                                if(apr_fnmatch(name[i], x->sni_name ,
+                                                                APR_FNM_CASE_BLIND|
+                                                                APR_FNM_PERIOD|
+                                                                APR_FNM_PATHNAME|
+                                                                APR_FNM_NOESCAPE) == APR_SUCCESS) {
+                                x->sc = tsc;
+                                rv = 1;
                         }
                 }
         }
-
         return rv;
 }
 
-static int read_pgpcrt_cn(server_rec * s, apr_pool_t * p,
-                          gnutls_openpgp_crt_t cert, char **cert_cn)
-{
-        int rv = 0;
-        size_t data_len;
-
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        *cert_cn = NULL;
-
-        data_len = 0;
-        rv = gnutls_openpgp_crt_get_name(cert, 0, NULL, &data_len);
-
-        if (rv == GNUTLS_E_SHORT_MEMORY_BUFFER && data_len > 1) {
-                *cert_cn = apr_palloc(p, data_len);
-                rv = gnutls_openpgp_crt_get_name(cert, 0, *cert_cn,
-                                                 &data_len);
-        } else {                /* No CN return subject alternative name */
-                ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
-                             "No name found in PGP certificate for '%s:%d'.",
-                             s->server_hostname, s->port);
-        }
-
-        return rv;
-}
-
-
-int
-mgs_hook_post_config(apr_pool_t * p, apr_pool_t * plog,
-                     apr_pool_t * ptemp, server_rec * base_server)
-{
-        int rv;
-        server_rec *s;
-        gnutls_dh_params_t dh_params = NULL;
-        gnutls_rsa_params_t rsa_params = NULL;
-        mgs_srvconf_rec *sc;
-        mgs_srvconf_rec *sc_base;
-        void *data = NULL;
-        int first_run = 0;
-        const char *userdata_key = "mgs_init";
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        apr_pool_userdata_get(&data, userdata_key,
-                              base_server->process->pool);
-        if (data == NULL) {
-                first_run = 1;
-                apr_pool_userdata_set((const void *) 1, userdata_key,
-                                      apr_pool_cleanup_null,
-                                      base_server->process->pool);
-        }
-
-
-        s = base_server;
-        sc_base =
-            (mgs_srvconf_rec *) ap_get_module_config(s->module_config,
-                                                     &gnutls_module);
-
-        gnutls_dh_params_init(&dh_params);
-
-        if (sc_base->dh_params == NULL) {
-                gnutls_datum pdata = {
-                        (void *) static_dh_params,
-                        sizeof(static_dh_params)
-                };
-                /* loading defaults */
-                rv = gnutls_dh_params_import_pkcs3(dh_params, &pdata,
-                                                   GNUTLS_X509_FMT_PEM);
-
-                if (rv < 0) {
-                        ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s,
-                                     "GnuTLS: Unable to load DH Params: (%d) %s",
-                                     rv, gnutls_strerror(rv));
-                        exit(rv);
-                }
-        } else
-                dh_params = sc_base->dh_params;
-
-        if (sc_base->rsa_params != NULL)
-                rsa_params = sc_base->rsa_params;
-
-        /* else not an error but RSA-EXPORT ciphersuites are not available 
-         */
-
-        rv = mgs_cache_post_config(p, s, sc_base);
-        if (rv != 0) {
-                ap_log_error(APLOG_MARK, APLOG_STARTUP, rv, s,
-                             "GnuTLS: Post Config for GnuTLSCache Failed."
-                             " Shutting Down.");
-                exit(-1);
-        }
-
-        for (s = base_server; s; s = s->next) {
-                void *load = NULL;
-                sc = (mgs_srvconf_rec *)
-                    ap_get_module_config(s->module_config, &gnutls_module);
-                sc->cache_type = sc_base->cache_type;
-                sc->cache_config = sc_base->cache_config;
-
-                /* Check if the priorities have been set */
-                if (sc->priorities == NULL
-                    && sc->enabled == GNUTLS_ENABLED_TRUE) {
-                        ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s,
-                                     "GnuTLS: Host '%s:%d' is missing the GnuTLSPriorities directive!",
-                                     s->server_hostname, s->port);
-                        exit(-1);
-                }
-
-                /* Check if DH or RSA params have been set per host */
-                if (sc->rsa_params != NULL)
-                        load = sc->rsa_params;
-                else if (rsa_params)
-                        load = rsa_params;
-
-                if (load != NULL)
-                        gnutls_certificate_set_rsa_export_params(sc->certs,
-                                                                 load);
-
-
-                load = NULL;
-                if (sc->dh_params != NULL)
-                        load = sc->dh_params;
-                else if (dh_params)
-                        load = dh_params;
-
-                if (load != NULL) {     /* not needed but anyway */
-                        gnutls_certificate_set_dh_params(sc->certs, load);
-                        gnutls_anon_set_server_dh_params(sc->anon_creds,
-                                                         load);
-                }
-
-                gnutls_certificate_server_set_retrieve_function(sc->certs,
-                                                                cert_retrieve_fn);
-
-#ifdef ENABLE_SRP
-                if (sc->srp_tpasswd_conf_file != NULL
-                    && sc->srp_tpasswd_file != NULL) {
-                        rv = gnutls_srp_set_server_credentials_file
-                            (sc->srp_creds, sc->srp_tpasswd_file,
-                             sc->srp_tpasswd_conf_file);
-
-                        if (rv < 0 && sc->enabled == GNUTLS_ENABLED_TRUE) {
-                                ap_log_error(APLOG_MARK, APLOG_STARTUP, 0,
-                                             s,
-                                             "[GnuTLS] - Host '%s:%d' is missing a "
-                                             "SRP password or conf File!",
-                                             s->server_hostname, s->port);
-                                exit(-1);
-                        }
-                }
+static int vhost_cb(void *baton, conn_rec * conn, server_rec * s) {
+    mgs_srvconf_rec *tsc;
+    vhost_cb_rec *x = baton;
+    int ret;
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    tsc = (mgs_srvconf_rec *) ap_get_module_config(s->module_config,
+            &gnutls_module);
+
+    if (tsc->enabled != GNUTLS_ENABLED_TRUE || tsc->cert_cn == NULL) {
+        return 0;
+    }
+
+    if (tsc->certs_x509_chain_num > 0) {
+        /* why are we doing this check? */
+        ret = gnutls_x509_crt_check_hostname(tsc->certs_x509_chain[0], s->server_hostname);
+        if (0 == ret)
+            ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
+                         "GnuTLS: Error checking certificate for hostname "
+                         "'%s'", s->server_hostname);
+    } else {
+        ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
+                     "GnuTLS: SNI request for '%s' but no X.509 certs available at all",
+                     s->server_hostname);
+    }
+        return check_server_aliases(x, s, tsc);
+}
 #endif
 
-                if (sc->certs_x509[0] == NULL &&
-                    sc->cert_pgp == NULL &&
-                    sc->enabled == GNUTLS_ENABLED_TRUE) {
-                        ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s,
-                                     "[GnuTLS] - Host '%s:%d' is missing a "
-                                     "Certificate File!",
-                                     s->server_hostname, s->port);
-                        exit(-1);
-                }
-
-                if (sc->enabled == GNUTLS_ENABLED_TRUE &&
-                    ((sc->certs_x509[0] != NULL
-                      && sc->privkey_x509 == NULL) || (sc->cert_pgp != NULL
-                                                       && sc->privkey_pgp
-                                                       == NULL))) {
-                        ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s,
-                                     "[GnuTLS] - Host '%s:%d' is missing a "
-                                     "Private Key File!",
-                                     s->server_hostname, s->port);
-                        exit(-1);
-                }
-
-                if (sc->enabled == GNUTLS_ENABLED_TRUE) {
-                        rv = read_crt_cn(s, p, sc->certs_x509[0],
-                                         &sc->cert_cn);
-                        if (rv < 0 && sc->cert_pgp != NULL)     /* try openpgp certificate */
-                                rv = read_pgpcrt_cn(s, p, sc->cert_pgp,
-                                                    &sc->cert_cn);
-
-                        if (rv < 0) {
-                                ap_log_error(APLOG_MARK, APLOG_STARTUP, 0,
-                                             s,
-                                             "[GnuTLS] - Cannot find a certificate for host '%s:%d'!",
-                                             s->server_hostname, s->port);
-                                sc->cert_cn = NULL;
-                                continue;
-                        }
-                }
-        }
-
-
-        ap_add_version_component(p, "mod_gnutls/" MOD_GNUTLS_VERSION);
-
-        return OK;
-}
-
-void mgs_hook_child_init(apr_pool_t * p, server_rec * s)
-{
-        apr_status_t rv = APR_SUCCESS;
-        mgs_srvconf_rec *sc = ap_get_module_config(s->module_config,
-                                                   &gnutls_module);
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        if (sc->cache_type != mgs_cache_none) {
-                rv = mgs_cache_child_init(p, s, sc);
-                if (rv != APR_SUCCESS) {
-                        ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s,
-                                     "[GnuTLS] - Failed to run Cache Init");
-                }
-        }
-}
-
-const char *mgs_hook_http_scheme(const request_rec * r)
-{
-        mgs_srvconf_rec *sc;
-
-        if (r == NULL)
-                return NULL;
-
-        sc = (mgs_srvconf_rec *) ap_get_module_config(r->
-                                                      server->module_config,
-                                                      &gnutls_module);
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        if (sc->enabled == GNUTLS_ENABLED_FALSE) {
-                return NULL;
-        }
-
-        return "https";
-}
-
-apr_port_t mgs_hook_default_port(const request_rec * r)
-{
-        mgs_srvconf_rec *sc;
-
-        if (r == NULL)
-                return 0;
-
-        sc = (mgs_srvconf_rec *) ap_get_module_config(r->
-                                                      server->module_config,
-                                                      &gnutls_module);
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        if (sc->enabled == GNUTLS_ENABLED_FALSE) {
-                return 0;
-        }
-
-        return 443;
-}
-
-#define MAX_HOST_LEN 255
-
+mgs_srvconf_rec *mgs_find_sni_server(gnutls_session_t session) {
+    int rv;
+    unsigned int sni_type;
+    size_t data_len = MAX_HOST_LEN;
+    char sni_name[MAX_HOST_LEN];
+    mgs_handle_t *ctxt;
 #if USING_2_1_RECENT
-typedef struct {
-        mgs_handle_t *ctxt;
-        mgs_srvconf_rec *sc;
-        const char *sni_name;
-} vhost_cb_rec;
-
-static int vhost_cb(void *baton, conn_rec * conn, server_rec * s)
-{
-        mgs_srvconf_rec *tsc;
-        vhost_cb_rec *x = baton;
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        tsc = (mgs_srvconf_rec *) ap_get_module_config(s->module_config,
-                                                       &gnutls_module);
-
-        if (tsc->enabled != GNUTLS_ENABLED_TRUE || tsc->cert_cn == NULL) {
-                return 0;
-        }
-
-        /* The CN can contain a * -- this will match those too. */
-        if (ap_strcasecmp_match(x->sni_name, tsc->cert_cn) == 0) {
-                /* found a match */
-#if MOD_GNUTLS_DEBUG
-                ap_log_error(APLOG_MARK, APLOG_DEBUG, 0,
-                             x->ctxt->c->base_server,
-                             "GnuTLS: Virtual Host CB: "
-                             "'%s' == '%s'", tsc->cert_cn, x->sni_name);
+    vhost_cb_rec cbx;
+#else
+    server_rec *s;
+    mgs_srvconf_rec *tsc;
 #endif
-                /* Because we actually change the server used here, we need to reset
-                 * things like ClientVerify.
-                 */
-                x->sc = tsc;
-                /* Shit. Crap. Dammit. We *really* should rehandshake here, as our
-                 * certificate structure *should* change when the server changes. 
-                 * acccckkkkkk. 
-                 */
-                return 1;
-        } else {
-#if MOD_GNUTLS_DEBUG
-                ap_log_error(APLOG_MARK, APLOG_DEBUG, 0,
-                             x->ctxt->c->base_server,
-                             "GnuTLS: Virtual Host CB: "
-                             "'%s' != '%s'", tsc->cert_cn, x->sni_name);
-#endif
-
-        }
-        return 0;
-}
-#endif
-
-mgs_srvconf_rec *mgs_find_sni_server(gnutls_session_t session)
-{
-        int rv;
-        unsigned int sni_type;
-        size_t data_len = MAX_HOST_LEN;
-        char sni_name[MAX_HOST_LEN];
-        mgs_handle_t *ctxt;
-#if USING_2_1_RECENT
-        vhost_cb_rec cbx;
-#else
-        server_rec *s;
-        mgs_srvconf_rec *tsc;
-#endif
-
-        if (session == NULL)
-                return NULL;
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        ctxt = gnutls_transport_get_ptr(session);
-
-        rv = gnutls_server_name_get(ctxt->session, sni_name,
-                                    &data_len, &sni_type, 0);
-
-        if (rv != 0) {
-                return NULL;
-        }
-
-        if (sni_type != GNUTLS_NAME_DNS) {
-                ap_log_error(APLOG_MARK, APLOG_CRIT, 0,
-                             ctxt->c->base_server,
-                             "GnuTLS: Unknown type '%d' for SNI: "
-                             "'%s'", sni_type, sni_name);
-                return NULL;
-        }
+
+    if (session == NULL)
+        return NULL;
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    ctxt = gnutls_transport_get_ptr(session);
+
+    rv = gnutls_server_name_get(ctxt->session, sni_name,
+            &data_len, &sni_type, 0);
+
+    if (rv != 0) {
+        return NULL;
+    }
+
+    if (sni_type != GNUTLS_NAME_DNS) {
+        ap_log_error(APLOG_MARK, APLOG_CRIT, 0,
+                ctxt->c->base_server,
+                "GnuTLS: Unknown type '%d' for SNI: "
+                "'%s'", sni_type, sni_name);
+        return NULL;
+    }
 
     /**
@@ -641 +652 @@
      */
 #if USING_2_1_RECENT
-        cbx.ctxt = ctxt;
-        cbx.sc = NULL;
-        cbx.sni_name = sni_name;
-
-        rv = ap_vhost_iterate_given_conn(ctxt->c, vhost_cb, &cbx);
-        if (rv == 1) {
-                return cbx.sc;
+    cbx.ctxt = ctxt;
+    cbx.sc = NULL;
+    cbx.sni_name = sni_name;
+
+    rv = ap_vhost_iterate_given_conn(ctxt->c, vhost_cb, &cbx);
+    if (rv == 1) {
+        return cbx.sc;
+    }
+#else
+    for (s = ap_server_conf; s; s = s->next) {
+
+        tsc = (mgs_srvconf_rec *) ap_get_module_config(s->module_config,
+                &gnutls_module);
+
+        if (tsc->enabled != GNUTLS_ENABLED_TRUE) { continue; }
+
+                                if(check_server_aliases(x, s, tsc)) {
+                                        return tsc;
+                                }
+#endif
+    return NULL;
+}
+
+static void create_gnutls_handle(conn_rec * c) {
+    mgs_handle_t *ctxt;
+    /* Get mod_gnutls Configuration Record */
+    mgs_srvconf_rec *sc =(mgs_srvconf_rec *)
+            ap_get_module_config(c->base_server->module_config,&gnutls_module);
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    ctxt = apr_pcalloc(c->pool, sizeof (*ctxt));
+    ctxt->c = c;
+    ctxt->sc = sc;
+    ctxt->status = 0;
+    ctxt->input_rc = APR_SUCCESS;
+    ctxt->input_bb = apr_brigade_create(c->pool, c->bucket_alloc);
+    ctxt->input_cbuf.length = 0;
+    ctxt->output_rc = APR_SUCCESS;
+    ctxt->output_bb = apr_brigade_create(c->pool, c->bucket_alloc);
+    ctxt->output_blen = 0;
+    ctxt->output_length = 0;
+    /* Initialize GnuTLS Library */
+    gnutls_init(&ctxt->session, GNUTLS_SERVER);
+    /* Initialize Session Tickets */
+    if (session_ticket_key.data != NULL && ctxt->sc->tickets != 0) {
+        gnutls_session_ticket_enable_server(ctxt->session,&session_ticket_key);
+    }
+
+    /* Set Default Priority */
+        gnutls_priority_set_direct (ctxt->session, "NORMAL", NULL);
+    /* Set Handshake function */
+    gnutls_handshake_set_post_client_hello_function(ctxt->session,
+            mgs_select_virtual_server_cb);
+    /* Initialize Session Cache */
+    mgs_cache_session_init(ctxt);
+
+    /* Set this config for this connection */
+    ap_set_module_config(c->conn_config, &gnutls_module, ctxt);
+    /* Set pull, push & ptr functions */
+    gnutls_transport_set_pull_function(ctxt->session,
+            mgs_transport_read);
+    gnutls_transport_set_push_function(ctxt->session,
+            mgs_transport_write);
+    gnutls_transport_set_ptr(ctxt->session, ctxt);
+    /* Add IO filters */
+    ctxt->input_filter = ap_add_input_filter(GNUTLS_INPUT_FILTER_NAME,
+            ctxt, NULL, c);
+    ctxt->output_filter = ap_add_output_filter(GNUTLS_OUTPUT_FILTER_NAME,
+            ctxt, NULL, c);
+}
+
+int mgs_hook_pre_connection(conn_rec * c, void *csd) {
+    mgs_srvconf_rec *sc;
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+
+    sc = (mgs_srvconf_rec *) ap_get_module_config(c->base_server->module_config,
+            &gnutls_module);
+
+    if (sc && (!sc->enabled || sc->proxy_enabled == GNUTLS_ENABLED_TRUE)) {
+        return DECLINED;
+    }
+
+    create_gnutls_handle(c);
+    return OK;
+}
+
+int mgs_hook_fixups(request_rec * r) {
+    unsigned char sbuf[GNUTLS_MAX_SESSION_ID];
+    char buf[AP_IOBUFSIZE];
+    const char *tmp;
+    size_t len;
+    mgs_handle_t *ctxt;
+    int rv = OK;
+
+    if (r == NULL)
+        return DECLINED;
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    apr_table_t *env = r->subprocess_env;
+
+    ctxt =
+            ap_get_module_config(r->connection->conn_config,
+            &gnutls_module);
+
+    if (!ctxt || ctxt->session == NULL) {
+        return DECLINED;
+    }
+
+    apr_table_setn(env, "HTTPS", "on");
+
+    apr_table_setn(env, "SSL_VERSION_LIBRARY",
+            "GnuTLS/" LIBGNUTLS_VERSION);
+    apr_table_setn(env, "SSL_VERSION_INTERFACE",
+            "mod_gnutls/" MOD_GNUTLS_VERSION);
+
+    apr_table_setn(env, "SSL_PROTOCOL",
+            gnutls_protocol_get_name(gnutls_protocol_get_version(ctxt->session)));
+
+    /* should have been called SSL_CIPHERSUITE instead */
+    apr_table_setn(env, "SSL_CIPHER",
+            gnutls_cipher_suite_get_name(gnutls_kx_get(ctxt->session),
+                                         gnutls_cipher_get(ctxt->session),
+                                         gnutls_mac_get(ctxt->session)));
+
+    apr_table_setn(env, "SSL_COMPRESS_METHOD",
+            gnutls_compression_get_name(gnutls_compression_get(ctxt->session)));
+
+#ifdef ENABLE_SRP
+    if (ctxt->sc->srp_tpasswd_conf_file != NULL && ctxt->sc->srp_tpasswd_file != NULL) {
+        tmp = gnutls_srp_server_get_username(ctxt->session);
+        apr_table_setn(env, "SSL_SRP_USER", (tmp != NULL) ? tmp : "");
+    } else {
+        apr_table_unset(env, "SSL_SRP_USER");
+    }
+#endif
+
+    if (apr_table_get(env, "SSL_CLIENT_VERIFY") == NULL)
+        apr_table_setn(env, "SSL_CLIENT_VERIFY", "NONE");
+
+    unsigned int key_size = 8 * gnutls_cipher_get_key_size(gnutls_cipher_get(ctxt->session));
+    tmp = apr_psprintf(r->pool, "%u", key_size);
+
+    apr_table_setn(env, "SSL_CIPHER_USEKEYSIZE", tmp);
+
+    apr_table_setn(env, "SSL_CIPHER_ALGKEYSIZE", tmp);
+
+    apr_table_setn(env, "SSL_CIPHER_EXPORT",
+            (key_size <= 40) ? "true" : "false");
+
+    int dhsize = gnutls_dh_get_prime_bits(ctxt->session);
+    if (dhsize > 0) {
+        tmp = apr_psprintf(r->pool, "%d", dhsize);
+        apr_table_setn(env, "SSL_DH_PRIME_BITS", tmp);
+    }
+
+    len = sizeof (sbuf);
+    gnutls_session_get_id(ctxt->session, sbuf, &len);
+    tmp = mgs_session_id2sz(sbuf, len, buf, sizeof (buf));
+    apr_table_setn(env, "SSL_SESSION_ID", apr_pstrdup(r->pool, tmp));
+
+    if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_X509) {
+                mgs_add_common_cert_vars(r, ctxt->sc->certs_x509_chain[0], 0, ctxt->sc->export_certificates_enabled);
+        } else if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_OPENPGP) {
+        mgs_add_common_pgpcert_vars(r, ctxt->sc->cert_pgp, 0, ctxt->sc->export_certificates_enabled);
         }
-#else
-        for (s = ap_server_conf; s; s = s->next) {
-
-                tsc =
-                    (mgs_srvconf_rec *)
-                    ap_get_module_config(s->module_config, &gnutls_module);
-                if (tsc->enabled != GNUTLS_ENABLED_TRUE) {
-                        continue;
-                }
+
+    return rv;
+}
+
+int mgs_hook_authz(request_rec * r) {
+    int rv;
+    mgs_handle_t *ctxt;
+    mgs_dirconf_rec *dc;
+
+    if (r == NULL)
+        return DECLINED;
+
+    dc = ap_get_module_config(r->per_dir_config, &gnutls_module);
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    ctxt =
+            ap_get_module_config(r->connection->conn_config,
+            &gnutls_module);
+
+    if (!ctxt || ctxt->session == NULL) {
+        return DECLINED;
+    }
+
+    if (dc->client_verify_mode == GNUTLS_CERT_IGNORE) {
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+                "GnuTLS: Directory set to Ignore Client Certificate!");
+    } else {
+        if (ctxt->sc->client_verify_mode < dc->client_verify_mode) {
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+                    "GnuTLS: Attempting to rehandshake with peer. %d %d",
+                    ctxt->sc->client_verify_mode,
+                    dc->client_verify_mode);
+
+            /* If we already have a client certificate, there's no point in
+             * re-handshaking... */
+            rv = mgs_cert_verify(r, ctxt);
+            if (rv != DECLINED && rv != HTTP_FORBIDDEN)
+                return rv;
+
+            gnutls_certificate_server_set_request
+                    (ctxt->session, dc->client_verify_mode);
+
+            if (mgs_rehandshake(ctxt) != 0) {
+                return HTTP_FORBIDDEN;
+            }
+        } else if (ctxt->sc->client_verify_mode ==
+                GNUTLS_CERT_IGNORE) {
 #if MOD_GNUTLS_DEBUG
-                ap_log_error(APLOG_MARK, APLOG_DEBUG, 0,
-                             ctxt->c->base_server,
-                             "GnuTLS: sni-x509 cn: %s/%d pk: %s s: 0x%08X s->n: 0x%08X  sc: 0x%08X",
-                             tsc->cert_cn, rv,
-                             gnutls_pk_algorithm_get_name
-                             (gnutls_x509_privkey_get_pk_algorithm
-                              (ctxt->sc->privkey_x509)), (unsigned int) s,
-                             (unsigned int) s->next, (unsigned int) tsc);
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                    "GnuTLS: Peer is set to IGNORE");
 #endif
-                /* The CN can contain a * -- this will match those too. */
-                if (ap_strcasecmp_match(sni_name, tsc->cert_cn) == 0) {
-#if MOD_GNUTLS_DEBUG
-                        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0,
-                                     ctxt->c->base_server,
-                                     "GnuTLS: Virtual Host: "
-                                     "'%s' == '%s'", tsc->cert_cn,
-                                     sni_name);
-#endif
-                        return tsc;
-                }
-        }
-#endif
-        return NULL;
-}
-
-
-static const int protocol_priority[] = {
-        GNUTLS_TLS1_1, GNUTLS_TLS1_0, GNUTLS_SSL3, 0
-};
-
-
-static mgs_handle_t *create_gnutls_handle(apr_pool_t * pool, conn_rec * c)
-{
-        mgs_handle_t *ctxt;
-        mgs_srvconf_rec *sc =
-            (mgs_srvconf_rec *) ap_get_module_config(c->base_server->
-                                                     module_config,
-                                                     &gnutls_module);
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        ctxt = apr_pcalloc(pool, sizeof(*ctxt));
-        ctxt->c = c;
-        ctxt->sc = sc;
-        ctxt->status = 0;
-
-        ctxt->input_rc = APR_SUCCESS;
-        ctxt->input_bb = apr_brigade_create(c->pool, c->bucket_alloc);
-        ctxt->input_cbuf.length = 0;
-
-        ctxt->output_rc = APR_SUCCESS;
-        ctxt->output_bb = apr_brigade_create(c->pool, c->bucket_alloc);
-        ctxt->output_blen = 0;
-        ctxt->output_length = 0;
-
-        gnutls_init(&ctxt->session, GNUTLS_SERVER);
-        if (session_ticket_key.data != NULL && ctxt->sc->tickets != 0)
-                gnutls_session_ticket_enable_server(ctxt->session,
-                                                    &session_ticket_key);
-
-        /* because we don't set any default priorities here (we set later at
-         * the user hello callback) we need to at least set this in order for
-         * gnutls to be able to read packets.
-         */
-        gnutls_protocol_set_priority(ctxt->session, protocol_priority);
-
-        gnutls_handshake_set_post_client_hello_function(ctxt->session,
-                                                        mgs_select_virtual_server_cb);
-
-        mgs_cache_session_init(ctxt);
-
-        return ctxt;
-}
-
-int mgs_hook_pre_connection(conn_rec * c, void *csd)
-{
-        mgs_handle_t *ctxt;
-        mgs_srvconf_rec *sc;
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-
-        if (c == NULL) {
-                return DECLINED;
-        }
-
-        sc = (mgs_srvconf_rec *) ap_get_module_config(c->base_server->
-                                                      module_config,
-                                                      &gnutls_module);
-
-        if (!(sc && (sc->enabled == GNUTLS_ENABLED_TRUE))) {
-                return DECLINED;
-        }
-
-        if (c->remote_addr->hostname || apr_strnatcmp(c->remote_ip,c->local_ip) == 0) {
-        /* Connection initiated by Apache (mod_proxy) => ignore */
-                return OK;
-        }
-                
-        ctxt = create_gnutls_handle(c->pool, c);
-
-        ap_set_module_config(c->conn_config, &gnutls_module, ctxt);
-
-        gnutls_transport_set_pull_function(ctxt->session,
-                                           mgs_transport_read);
-        gnutls_transport_set_push_function(ctxt->session,
-                                           mgs_transport_write);
-        gnutls_transport_set_ptr(ctxt->session, ctxt);
-
-        ctxt->input_filter =
-            ap_add_input_filter(GNUTLS_INPUT_FILTER_NAME, ctxt, NULL, c);
-        ctxt->output_filter =
-            ap_add_output_filter(GNUTLS_OUTPUT_FILTER_NAME, ctxt, NULL, c);
-
-        return OK;
-}
-
-int mgs_hook_fixups(request_rec * r)
-{
-        unsigned char sbuf[GNUTLS_MAX_SESSION_ID];
-        char buf[AP_IOBUFSIZE];
-        const char *tmp;
-        size_t len;
-        mgs_handle_t *ctxt;
-        int rv = OK;
-
-        if (r == NULL)
-                return DECLINED;
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        apr_table_t *env = r->subprocess_env;
-
-        ctxt =
-            ap_get_module_config(r->connection->conn_config,
-                                 &gnutls_module);
-
-        if (!ctxt || ctxt->session == NULL) {
-                return DECLINED;
-        }
-
-        apr_table_setn(env, "HTTPS", "on");
-
-        apr_table_setn(env, "SSL_VERSION_LIBRARY",
-                       "GnuTLS/" LIBGNUTLS_VERSION);
-        apr_table_setn(env, "SSL_VERSION_INTERFACE",
-                       "mod_gnutls/" MOD_GNUTLS_VERSION);
-
-        apr_table_setn(env, "SSL_PROTOCOL",
-                       gnutls_protocol_get_name(gnutls_protocol_get_version
-                                                (ctxt->session)));
-
-        /* should have been called SSL_CIPHERSUITE instead */
-        apr_table_setn(env, "SSL_CIPHER",
-                       gnutls_cipher_suite_get_name(gnutls_kx_get
-                                                    (ctxt->session),
-                                                    gnutls_cipher_get
-                                                    (ctxt->session),
-                                                    gnutls_mac_get
-                                                    (ctxt->session)));
-
-        apr_table_setn(env, "SSL_COMPRESS_METHOD",
-                       gnutls_compression_get_name(gnutls_compression_get
-                                                   (ctxt->session)));
-
-#ifdef ENABLE_SRP
-        tmp = gnutls_srp_server_get_username(ctxt->session);
-        apr_table_setn(env, "SSL_SRP_USER", (tmp != NULL) ? tmp : "");
-#endif
-
-        if (apr_table_get(env, "SSL_CLIENT_VERIFY") == NULL)
-                apr_table_setn(env, "SSL_CLIENT_VERIFY", "NONE");
-
-        unsigned int key_size =
-            8 *
-            gnutls_cipher_get_key_size(gnutls_cipher_get(ctxt->session));
-        tmp = apr_psprintf(r->pool, "%u", key_size);
-
-        apr_table_setn(env, "SSL_CIPHER_USEKEYSIZE", tmp);
-
-        apr_table_setn(env, "SSL_CIPHER_ALGKEYSIZE", tmp);
-
-        apr_table_setn(env, "SSL_CIPHER_EXPORT",
-                       (key_size <= 40) ? "true" : "false");
-
-        len = sizeof(sbuf);
-        gnutls_session_get_id(ctxt->session, sbuf, &len);
-        tmp = mgs_session_id2sz(sbuf, len, buf, sizeof(buf));
-        apr_table_setn(env, "SSL_SESSION_ID", apr_pstrdup(r->pool, tmp));
-
-        if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_X509)
-                mgs_add_common_cert_vars(r, ctxt->sc->certs_x509[0], 0,
-                                         ctxt->
-                                         sc->export_certificates_enabled);
-        else if (gnutls_certificate_type_get(ctxt->session) ==
-                 GNUTLS_CRT_OPENPGP)
-                mgs_add_common_pgpcert_vars(r, ctxt->sc->cert_pgp, 0,
-                                            ctxt->
-                                            sc->export_certificates_enabled);
-
-        return rv;
-}
-
-int mgs_hook_authz(request_rec * r)
-{
-        int rv;
-        mgs_handle_t *ctxt;
-        mgs_dirconf_rec *dc;
-
-        if (r == NULL)
-                return DECLINED;
-
-        dc = ap_get_module_config(r->per_dir_config, &gnutls_module);
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        ctxt =
-            ap_get_module_config(r->connection->conn_config,
-                                 &gnutls_module);
-
-        if (!ctxt || ctxt->session == NULL) {
-                return DECLINED;
-        }
-
-        if (dc->client_verify_mode == GNUTLS_CERT_IGNORE) {
-                ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
-                              "GnuTLS: Directory set to Ignore Client Certificate!");
-        } else {
-                if (ctxt->sc->client_verify_mode < dc->client_verify_mode) {
-                        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
-                                      "GnuTLS: Attempting to rehandshake with peer. %d %d",
-                                      ctxt->sc->client_verify_mode,
-                                      dc->client_verify_mode);
-
-                        /* If we already have a client certificate, there's no point in
-                         * re-handshaking... */
-                        rv = mgs_cert_verify(r, ctxt);
-                        if (rv != DECLINED && rv != HTTP_FORBIDDEN)
-                                return rv;
-
-                        gnutls_certificate_server_set_request
-                            (ctxt->session, dc->client_verify_mode);
-
-                        if (mgs_rehandshake(ctxt) != 0) {
-                                return HTTP_FORBIDDEN;
-                        }
-                } else if (ctxt->sc->client_verify_mode ==
-                           GNUTLS_CERT_IGNORE) {
-#if MOD_GNUTLS_DEBUG
-                        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                                      "GnuTLS: Peer is set to IGNORE");
-#endif
-                        return DECLINED;
-                }
-                rv = mgs_cert_verify(r, ctxt);
-                if (rv != DECLINED &&
-                    (rv != HTTP_FORBIDDEN ||
-                     dc->client_verify_mode == GNUTLS_CERT_REQUIRE)) {
-                        return rv;
-                }
-        }
-
-        return DECLINED;
+            return DECLINED;
+        }
+        rv = mgs_cert_verify(r, ctxt);
+        if (rv != DECLINED &&
+                (rv != HTTP_FORBIDDEN ||
+                dc->client_verify_mode == GNUTLS_CERT_REQUIRE)) {
+            return rv;
+        }
+    }
+
+    return DECLINED;
 }
 
@@ -926 +888 @@
  */
 
-/* side is either 0 for SERVER or 1 for CLIENT
+/* @param side is either 0 for SERVER or 1 for CLIENT
+ *
+ * @param export_full_cert (boolean) export the PEM-encoded
+ * certificate in full as an environment variable.
  */
 #define MGS_SIDE ((side==0)?"SSL_SERVER":"SSL_CLIENT")
-static void
-mgs_add_common_cert_vars(request_rec * r, gnutls_x509_crt_t cert, int side,
-                         int export_certificates_enabled)
+
+static void mgs_add_common_cert_vars(request_rec * r, gnutls_x509_crt_t cert, int side, int export_full_cert) {
+    unsigned char sbuf[64]; /* buffer to hold serials */
+    char buf[AP_IOBUFSIZE];
+    const char *tmp;
+    char *tmp2;
+    size_t len;
+    int ret, i;
+
+    if (r == NULL)
+        return;
+
+    apr_table_t *env = r->subprocess_env;
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    if (export_full_cert != 0) {
+        char cert_buf[10 * 1024];
+        len = sizeof (cert_buf);
+
+        if (gnutls_x509_crt_export(cert, GNUTLS_X509_FMT_PEM, cert_buf, &len) >= 0)
+            apr_table_setn(env, apr_pstrcat(r->pool, MGS_SIDE, "_CERT", NULL),
+                           apr_pstrmemdup(r->pool, cert_buf, len));
+        else
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                          "GnuTLS: Failed to export X.509 certificate to environment");
+    }
+
+    len = sizeof (buf);
+    gnutls_x509_crt_get_dn(cert, buf, &len);
+    apr_table_setn(env, apr_pstrcat(r->pool, MGS_SIDE, "_S_DN", NULL),
+            apr_pstrmemdup(r->pool, buf, len));
+
+    len = sizeof (buf);
+    gnutls_x509_crt_get_issuer_dn(cert, buf, &len);
+    apr_table_setn(env, apr_pstrcat(r->pool, MGS_SIDE, "_I_DN", NULL),
+            apr_pstrmemdup(r->pool, buf, len));
+
+    len = sizeof (sbuf);
+    gnutls_x509_crt_get_serial(cert, sbuf, &len);
+    tmp = mgs_session_id2sz(sbuf, len, buf, sizeof (buf));
+    apr_table_setn(env,
+            apr_pstrcat(r->pool, MGS_SIDE, "_M_SERIAL", NULL),
+            apr_pstrdup(r->pool, tmp));
+
+    ret = gnutls_x509_crt_get_version(cert);
+    if (ret > 0)
+        apr_table_setn(env,
+            apr_pstrcat(r->pool, MGS_SIDE, "_M_VERSION",
+            NULL), apr_psprintf(r->pool,
+            "%u", ret));
+
+    apr_table_setn(env,
+            apr_pstrcat(r->pool, MGS_SIDE, "_CERT_TYPE", NULL),
+            "X.509");
+
+    tmp =
+            mgs_time2sz(gnutls_x509_crt_get_expiration_time
+            (cert), buf, sizeof (buf));
+    apr_table_setn(env, apr_pstrcat(r->pool, MGS_SIDE, "_V_END", NULL),
+            apr_pstrdup(r->pool, tmp));
+
+    tmp =
+            mgs_time2sz(gnutls_x509_crt_get_activation_time
+            (cert), buf, sizeof (buf));
+    apr_table_setn(env,
+            apr_pstrcat(r->pool, MGS_SIDE, "_V_START", NULL),
+            apr_pstrdup(r->pool, tmp));
+
+    ret = gnutls_x509_crt_get_signature_algorithm(cert);
+    if (ret >= 0) {
+        apr_table_setn(env,
+                apr_pstrcat(r->pool, MGS_SIDE, "_A_SIG",
+                NULL),
+                gnutls_sign_algorithm_get_name(ret));
+    }
+
+    ret = gnutls_x509_crt_get_pk_algorithm(cert, NULL);
+    if (ret >= 0) {
+        apr_table_setn(env,
+                apr_pstrcat(r->pool, MGS_SIDE, "_A_KEY",
+                NULL),
+                gnutls_pk_algorithm_get_name(ret));
+    }
+
+    /* export all the alternative names (DNS, RFC822 and URI) */
+    for (i = 0; !(ret < 0); i++) {
+        len = 0;
+        ret = gnutls_x509_crt_get_subject_alt_name(cert, i,
+                NULL, &len,
+                NULL);
+
+        if (ret == GNUTLS_E_SHORT_MEMORY_BUFFER && len > 1) {
+            tmp2 = apr_palloc(r->pool, len + 1);
+
+            ret =
+                    gnutls_x509_crt_get_subject_alt_name(cert, i,
+                    tmp2,
+                    &len,
+                    NULL);
+            tmp2[len] = 0;
+
+            if (ret == GNUTLS_SAN_DNSNAME) {
+                apr_table_setn(env,
+                        apr_psprintf(r->pool,
+                        "%s_S_AN%u",
+                        MGS_SIDE, i),
+                        apr_psprintf(r->pool,
+                        "DNSNAME:%s",
+                        tmp2));
+            } else if (ret == GNUTLS_SAN_RFC822NAME) {
+                apr_table_setn(env,
+                        apr_psprintf(r->pool,
+                        "%s_S_AN%u",
+                        MGS_SIDE, i),
+                        apr_psprintf(r->pool,
+                        "RFC822NAME:%s",
+                        tmp2));
+            } else if (ret == GNUTLS_SAN_URI) {
+                apr_table_setn(env,
+                        apr_psprintf(r->pool,
+                        "%s_S_AN%u",
+                        MGS_SIDE, i),
+                        apr_psprintf(r->pool,
+                        "URI:%s",
+                        tmp2));
+            } else {
+                apr_table_setn(env,
+                        apr_psprintf(r->pool,
+                        "%s_S_AN%u",
+                        MGS_SIDE, i),
+                        "UNSUPPORTED");
+            }
+        }
+    }
+}
+
+
+/* @param side 0: server, 1: client
+ *
+ * @param export_full_cert (boolean) export the PEM-encoded
+ * certificate in full as an environment variable.
+ */
+static void mgs_add_common_pgpcert_vars(request_rec * r, gnutls_openpgp_crt_t cert, int side, int export_full_cert) {
+
+        unsigned char sbuf[64]; /* buffer to hold serials */
+    char buf[AP_IOBUFSIZE];
+    const char *tmp;
+    size_t len;
+    int ret;
+
+    if (r == NULL)
+        return;
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    apr_table_t *env = r->subprocess_env;
+
+    if (export_full_cert != 0) {
+        char cert_buf[10 * 1024];
+        len = sizeof (cert_buf);
+
+        if (gnutls_openpgp_crt_export(cert, GNUTLS_OPENPGP_FMT_BASE64, cert_buf, &len) >= 0)
+            apr_table_setn(env, apr_pstrcat(r->pool, MGS_SIDE, "_CERT", NULL),
+                           apr_pstrmemdup(r->pool, cert_buf, len));
+        else
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                          "GnuTLS: Failed to export OpenPGP certificate to environment");
+    }
+
+    len = sizeof (buf);
+    gnutls_openpgp_crt_get_name(cert, 0, buf, &len);
+    apr_table_setn(env, apr_pstrcat(r->pool, MGS_SIDE, "_NAME", NULL),
+            apr_pstrmemdup(r->pool, buf, len));
+
+    len = sizeof (sbuf);
+    gnutls_openpgp_crt_get_fingerprint(cert, sbuf, &len);
+    tmp = mgs_session_id2sz(sbuf, len, buf, sizeof (buf));
+    apr_table_setn(env,
+            apr_pstrcat(r->pool, MGS_SIDE, "_FINGERPRINT",
+            NULL), apr_pstrdup(r->pool, tmp));
+
+    ret = gnutls_openpgp_crt_get_version(cert);
+    if (ret > 0)
+        apr_table_setn(env,
+            apr_pstrcat(r->pool, MGS_SIDE, "_M_VERSION",
+            NULL), apr_psprintf(r->pool,
+            "%u", ret));
+
+    apr_table_setn(env,
+            apr_pstrcat(r->pool, MGS_SIDE, "_CERT_TYPE", NULL),
+            "OPENPGP");
+
+    tmp =
+            mgs_time2sz(gnutls_openpgp_crt_get_expiration_time
+            (cert), buf, sizeof (buf));
+    apr_table_setn(env, apr_pstrcat(r->pool, MGS_SIDE, "_V_END", NULL),
+            apr_pstrdup(r->pool, tmp));
+
+    tmp =
+            mgs_time2sz(gnutls_openpgp_crt_get_creation_time
+            (cert), buf, sizeof (buf));
+    apr_table_setn(env,
+            apr_pstrcat(r->pool, MGS_SIDE, "_V_START", NULL),
+            apr_pstrdup(r->pool, tmp));
+
+    ret = gnutls_openpgp_crt_get_pk_algorithm(cert, NULL);
+    if (ret >= 0) {
+        apr_table_setn(env,
+                apr_pstrcat(r->pool, MGS_SIDE, "_A_KEY",
+                NULL),
+                gnutls_pk_algorithm_get_name(ret));
+    }
+
+}
+
+/* TODO: Allow client sending a X.509 certificate chain */
+static int mgs_cert_verify(request_rec * r, mgs_handle_t * ctxt) {
+    const gnutls_datum_t *cert_list;
+    unsigned int cert_list_size, status;
+    int rv = GNUTLS_E_NO_CERTIFICATE_FOUND, ret;
+    unsigned int ch_size = 0;
+
+    union {
+        gnutls_x509_crt_t x509[MAX_CHAIN_SIZE];
+        gnutls_openpgp_crt_t pgp;
+    } cert;
+    apr_time_t expiration_time, cur_time;
+
+    if (r == NULL || ctxt == NULL || ctxt->session == NULL)
+        return HTTP_FORBIDDEN;
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+    cert_list =
+            gnutls_certificate_get_peers(ctxt->session, &cert_list_size);
+
+    if (cert_list == NULL || cert_list_size == 0) {
+        /* It is perfectly OK for a client not to send a certificate if on REQUEST mode
+         */
+        if (ctxt->sc->client_verify_mode == GNUTLS_CERT_REQUEST)
+            return OK;
+
+        /* no certificate provided by the client, but one was required. */
+        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                "GnuTLS: Failed to Verify Peer: "
+                "Client did not submit a certificate");
+        return HTTP_FORBIDDEN;
+    }
+
+    if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_X509) {
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+                "GnuTLS: A Chain of %d certificate(s) was provided for validation",
+                cert_list_size);
+
+        for (ch_size = 0; ch_size < cert_list_size; ch_size++) {
+            gnutls_x509_crt_init(&cert.x509[ch_size]);
+            rv = gnutls_x509_crt_import(cert.x509[ch_size],
+                    &cert_list[ch_size],
+                    GNUTLS_X509_FMT_DER);
+            // When failure to import, leave the loop
+            if (rv != GNUTLS_E_SUCCESS) {
+                if (ch_size < 1) {
+                    ap_log_rerror(APLOG_MARK,
+                            APLOG_INFO, 0, r,
+                            "GnuTLS: Failed to Verify Peer: "
+                            "Failed to import peer certificates.");
+                    ret = HTTP_FORBIDDEN;
+                    goto exit;
+                }
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                        "GnuTLS: Failed to import some peer certificates. Using %d certificates",
+                        ch_size);
+                rv = GNUTLS_E_SUCCESS;
+                break;
+            }
+        }
+    } else if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_OPENPGP) {
+        if (cert_list_size > 1) {
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                    "GnuTLS: Failed to Verify Peer: "
+                    "Chained Client Certificates are not supported.");
+            return HTTP_FORBIDDEN;
+        }
+
+        gnutls_openpgp_crt_init(&cert.pgp);
+        rv = gnutls_openpgp_crt_import(cert.pgp, &cert_list[0],
+                GNUTLS_OPENPGP_FMT_RAW);
+
+    } else
+        return HTTP_FORBIDDEN;
+
+    if (rv < 0) {
+        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                "GnuTLS: Failed to Verify Peer: "
+                "Failed to import peer certificates.");
+        ret = HTTP_FORBIDDEN;
+        goto exit;
+    }
+
+    if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_X509) {
+        apr_time_ansi_put(&expiration_time,
+                gnutls_x509_crt_get_expiration_time
+                (cert.x509[0]));
+
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+                      "GnuTLS: Verifying list of %d certificate(s) via method '%s'",
+                      ch_size, mgs_readable_cvm(ctxt->sc->client_verify_method));
+        switch(ctxt->sc->client_verify_method) {
+        case mgs_cvm_cartel:
+            rv = gnutls_x509_crt_list_verify(cert.x509, ch_size,
+                                             ctxt->sc->ca_list,
+                                             ctxt->sc->ca_list_size,
+                                             NULL, 0, 0, &status);
+            break;
+#ifdef ENABLE_MSVA
+        case mgs_cvm_msva:
+        {
+            struct msv_response* resp = NULL;
+            struct msv_query q = { .context="https", .peertype="client", .pkctype="x509pem" };
+            msv_ctxt_t ctx = msv_ctxt_init(NULL);
+            char cert_pem_buf[10 * 1024];
+            size_t len = sizeof (cert_pem_buf);
+
+            rv = 0;
+            if (gnutls_x509_crt_export(cert.x509[0], GNUTLS_X509_FMT_PEM, cert_pem_buf, &len) >= 0) {
+                /* FIXME : put together a name from the cert we received, instead of hard-coding this value: */
+                q.peername = mgs_x509_construct_uid(r, cert.x509[0]);
+                q.pkcdata = cert_pem_buf;
+                rv = msv_query_agent(ctx, q, &resp);
+                if (rv == LIBMSV_ERROR_SUCCESS) {
+                    status = 0;
+                } else if (rv == LIBMSV_ERROR_INVALID) {
+                    ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+                                  "GnuTLS: Monkeysphere validation failed: (message: %s)", resp->message);
+                    status = GNUTLS_CERT_INVALID;
+                } else {
+                    ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+                                  "GnuTLS: Error communicating with the Monkeysphere Validation Agent: (%d) %s", rv, msv_strerror(ctx, rv));
+                    status = GNUTLS_CERT_INVALID;
+                    rv = -1;
+                }
+            } else {
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                              "GnuTLS: Could not convert the client certificate to PEM format");
+                status = GNUTLS_CERT_INVALID;
+                rv = GNUTLS_E_ASN1_ELEMENT_NOT_FOUND;
+            }
+            msv_response_destroy(resp);
+            msv_ctxt_destroy(ctx);
+        }
+            break;
+#endif
+        default:
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                          "GnuTLS: Failed to Verify X.509 Peer: method '%s' is not supported",
+                          mgs_readable_cvm(ctxt->sc->client_verify_method));
+        }
+
+    } else {
+        apr_time_ansi_put(&expiration_time,
+                gnutls_openpgp_crt_get_expiration_time
+                (cert.pgp));
+
+        switch(ctxt->sc->client_verify_method) {
+        case mgs_cvm_cartel:
+            rv = gnutls_openpgp_crt_verify_ring(cert.pgp,
+                                                ctxt->sc->pgp_list, 0,
+                                                &status);
+            break;
+#ifdef ENABLE_MSVA
+        case mgs_cvm_msva:
+            /* need to set status and rv */
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                          "GnuTLS:  OpenPGP verification via MSVA is not yet implemented");
+            rv = GNUTLS_E_UNIMPLEMENTED_FEATURE;
+            break;
+#endif
+        default:
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                          "GnuTLS: Failed to Verify OpenPGP Peer: method '%s' is not supported",
+                          mgs_readable_cvm(ctxt->sc->client_verify_method));
+        }
+    }
+
+    if (rv < 0) {
+        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                "GnuTLS: Failed to Verify Peer certificate: (%d) %s",
+                rv, gnutls_strerror(rv));
+        if (rv == GNUTLS_E_NO_CERTIFICATE_FOUND)
+            ap_log_rerror(APLOG_MARK, APLOG_EMERG, 0, r,
+                "GnuTLS: No certificate was found for verification. Did you set the GnuTLSX509CAFile or GnuTLSPGPKeyringFile directives?");
+        ret = HTTP_FORBIDDEN;
+        goto exit;
+    }
+
+    /* TODO: X509 CRL Verification. */
+    /* May add later if anyone needs it.
+     */
+    /* ret = gnutls_x509_crt_check_revocation(crt, crl_list, crl_list_size); */
+
+    cur_time = apr_time_now();
+
+    if (status & GNUTLS_CERT_SIGNER_NOT_FOUND) {
+        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                "GnuTLS: Could not find Signer for Peer Certificate");
+    }
+
+    if (status & GNUTLS_CERT_SIGNER_NOT_CA) {
+        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                "GnuTLS: Peer's Certificate signer is not a CA");
+    }
+
+    if (status & GNUTLS_CERT_INSECURE_ALGORITHM) {
+        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                "GnuTLS: Peer's Certificate is using insecure algorithms");
+    }
+
+    if (status & GNUTLS_CERT_EXPIRED
+            || status & GNUTLS_CERT_NOT_ACTIVATED) {
+        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                "GnuTLS: Peer's Certificate signer is expired or not yet activated");
+    }
+
+    if (status & GNUTLS_CERT_INVALID) {
+        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                "GnuTLS: Peer Certificate is invalid.");
+    } else if (status & GNUTLS_CERT_REVOKED) {
+        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                "GnuTLS: Peer Certificate is revoked.");
+    }
+
+    if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_X509)
+        mgs_add_common_cert_vars(r, cert.x509[0], 1, ctxt->sc->export_certificates_enabled);
+    else if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_OPENPGP)
+        mgs_add_common_pgpcert_vars(r, cert.pgp, 1, ctxt->sc->export_certificates_enabled);
+
+    {
+        /* days remaining */
+        unsigned long remain =
+                (apr_time_sec(expiration_time) -
+                apr_time_sec(cur_time)) / 86400;
+        apr_table_setn(r->subprocess_env, "SSL_CLIENT_V_REMAIN",
+                apr_psprintf(r->pool, "%lu", remain));
+    }
+
+    if (status == 0) {
+        apr_table_setn(r->subprocess_env, "SSL_CLIENT_VERIFY",
+                "SUCCESS");
+        ret = OK;
+    } else {
+        apr_table_setn(r->subprocess_env, "SSL_CLIENT_VERIFY",
+                "FAILED");
+        if (ctxt->sc->client_verify_mode == GNUTLS_CERT_REQUEST)
+            ret = OK;
+        else
+            ret = HTTP_FORBIDDEN;
+    }
+
+exit:
+    if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_X509) {
+        int i;
+        for (i = 0; i < ch_size; i++) {
+            gnutls_x509_crt_deinit(cert.x509[i]);
+        }
+    } else if (gnutls_certificate_type_get(ctxt->session) ==
+            GNUTLS_CRT_OPENPGP)
+        gnutls_openpgp_crt_deinit(cert.pgp);
+    return ret;
+
+
+}
+
+static const char* mgs_x509_leaf_oid_from_dn(apr_pool_t *pool, const char* oid, gnutls_x509_crt_t cert) {
+    int rv=GNUTLS_E_SUCCESS, i;
+    size_t sz=0, lastsz=0;
+    char* data=NULL;
+
+    i = -1;
+    while(rv != GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) {
+        i++;
+        lastsz=sz;
+        sz=0;
+        rv = gnutls_x509_crt_get_dn_by_oid (cert, oid, i, 0, NULL, &sz);
+    }
+    if (i > 0) {
+        data = apr_palloc(pool, lastsz);
+        sz=lastsz;
+        rv = gnutls_x509_crt_get_dn_by_oid (cert, oid, i-1, 0, data, &sz);
+        if (rv == GNUTLS_E_SUCCESS)
+            return data;
+    }
+    return NULL;
+}
+
+static const char* mgs_x509_first_type_from_san(apr_pool_t *pool, gnutls_x509_subject_alt_name_t target, gnutls_x509_crt_t cert) {
+    int rv=GNUTLS_E_SUCCESS;
+    size_t sz;
+    char* data=NULL;
+    unsigned int i;
+    gnutls_x509_subject_alt_name_t thistype;
+
+    i = 0;
+    while(rv != GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) {
+        sz = 0;
+        rv = gnutls_x509_crt_get_subject_alt_name2(cert, i, NULL, &sz, &thistype, NULL);
+        if (rv == GNUTLS_E_SHORT_MEMORY_BUFFER && thistype == target) {
+            data = apr_palloc(pool, sz);
+            rv = gnutls_x509_crt_get_subject_alt_name2(cert, i, data, &sz, &thistype, NULL);
+            if (rv == target)
+                return data;
+        }
+        i++;
+    }
+    return NULL;
+}
+
+/* Create a string representing a candidate User ID from an X.509
+ * certificate
+
+ * We need this for client certification because a client gives us a
+ * certificate, but doesn't tell us (in any other way) who they are
+ * trying to authenticate as.
+
+ * TODO: we might need another parallel for OpenPGP, but for that it's
+ * much simpler: we can just assume that the first User ID marked as
+ * "primary" (or the first User ID, period) is the identity the user
+ * is trying to present as.
+
+ * one complaint might be "but the user wanted to be another identity,
+ * which is also in the certificate (e.g. in a SubjectAltName)"
+ * However, given that any user can regenerate their own X.509
+ * certificate with their own public key content, they should just do
+ * so, and not expect us to guess at their identity :)
+
+ * This function allocates it's response from the pool given it.  When
+ * that pool is reclaimed, the response will also be deallocated.
+
+ * FIXME: what about extracting a server-style cert
+ *        (e.g. https://imposter.example) from the DN or any sAN?
+
+ * FIXME: what if we want to call this outside the context of a
+ *        request?  That complicates the logging.
+ */
+static const char* mgs_x509_construct_uid(request_rec *r, gnutls_x509_crt_t cert) {
+    /* basic strategy, assuming humans are the users: we are going to
+     * try to reconstruct a "conventional" User ID by pulling in a
+     * name, comment, and e-mail address.
+     */
+    apr_pool_t *pool = r->pool;
+    const char *name=NULL, *comment=NULL, *email=NULL;
+    const char *ret=NULL;
+    /* subpool for temporary allocation: */
+    apr_pool_t *sp=NULL;
+
+    if (APR_SUCCESS != apr_pool_create(&sp, pool))
+        return NULL; /* i'm assuming that libapr would log this kind
+                      * of error on its own */
+
+     /* Name
+
+     the name comes from the leaf commonName of the cert's Subject.
+
+     (MAYBE: should we look at trying to assemble a candidate from
+             givenName, surName, suffix, etc?  the "name" field
+             appears to be case-insensitive, which seems problematic
+             from what we expect; see:
+             http://www.itu.int/rec/T-REC-X.520-200102-s/e )
+
+     (MAYBE: should we try pulling a commonName or otherName or
+             something from subjectAltName? see:
+             https://tools.ietf.org/html/rfc5280#section-4.2.1.6
+             GnuTLS does not support looking for Common Names in the
+             SAN yet)
+     */
+    name = mgs_x509_leaf_oid_from_dn(sp, GNUTLS_OID_X520_COMMON_NAME, cert);
+
+    /* Comment
+
+       I am inclined to punt on this for now, as Comment has been so
+       atrociously misused in OpenPGP.  Perhaps if there is a
+       pseudonym (OID 2.5.4.65, aka GNUTLS_OID_X520_PSEUDONYM) field
+       in the subject or sAN?
+    */
+    comment = mgs_x509_leaf_oid_from_dn(sp, GNUTLS_OID_X520_PSEUDONYM, cert);
+
+    /* E-mail
+
+       This should be the the first rfc822Name from the sAN.
+
+       failing that, we'll take the leaf email in the certificate's
+       subject; this is a deprecated use though.
+     */
+    email = mgs_x509_first_type_from_san(sp, GNUTLS_SAN_RFC822NAME, cert);
+    if (email == NULL)
+        email = mgs_x509_leaf_oid_from_dn(sp, GNUTLS_OID_PKCS9_EMAIL, cert);
+
+    /* assemble all the parts: */
+
+    /* must have at least a name or an e-mail. */
+    if (name == NULL && email == NULL) {
+        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                "GnuTLS: Need either a name or an e-mail address to get a User ID from an X.509 certificate.");
+        goto end;
+    }
+    if (name) {
+        if (comment) {
+            if (email) {
+                ret = apr_psprintf(pool, "%s (%s) <%s>", name, comment, email);
+            } else {
+                ret = apr_psprintf(pool, "%s (%s)", name, comment);
+            }
+        } else {
+            if (email) {
+                ret = apr_psprintf(pool, "%s <%s>", name, email);
+            } else {
+                ret = apr_pstrdup(pool, name);
+            }
+        }
+    } else {
+        if (comment) {
+            ret = apr_psprintf(pool, "(%s) <%s>", comment, email);
+        } else {
+            ret = apr_psprintf(pool, "<%s>", email);
+        }
+    }
+
+end:
+    apr_pool_destroy(sp);
+    return ret;
+}
+
+static int mgs_status_hook(request_rec *r, int flags)
 {
-        unsigned char sbuf[64]; /* buffer to hold serials */
-        char buf[AP_IOBUFSIZE];
-        const char *tmp;
-        char *tmp2;
-        size_t len;
-        int ret, i;
-
-        if (r == NULL)
-                return;
-
-        apr_table_t *env = r->subprocess_env;
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        if (export_certificates_enabled != 0) {
-                char cert_buf[10 * 1024];
-                len = sizeof(cert_buf);
-
-                if (gnutls_x509_crt_export
-                    (cert, GNUTLS_X509_FMT_PEM, cert_buf, &len) >= 0)
-                        apr_table_setn(env,
-                                       apr_pstrcat(r->pool, MGS_SIDE,
-                                                   "_CERT", NULL),
-                                       apr_pstrmemdup(r->pool, cert_buf,
-                                                      len));
-
-        }
-
-        len = sizeof(buf);
-        gnutls_x509_crt_get_dn(cert, buf, &len);
-        apr_table_setn(env, apr_pstrcat(r->pool, MGS_SIDE, "_S_DN", NULL),
-                       apr_pstrmemdup(r->pool, buf, len));
-
-        len = sizeof(buf);
-        gnutls_x509_crt_get_issuer_dn(cert, buf, &len);
-        apr_table_setn(env, apr_pstrcat(r->pool, MGS_SIDE, "_I_DN", NULL),
-                       apr_pstrmemdup(r->pool, buf, len));
-
-        len = sizeof(sbuf);
-        gnutls_x509_crt_get_serial(cert, sbuf, &len);
-        tmp = mgs_session_id2sz(sbuf, len, buf, sizeof(buf));
-        apr_table_setn(env,
-                       apr_pstrcat(r->pool, MGS_SIDE, "_M_SERIAL", NULL),
-                       apr_pstrdup(r->pool, tmp));
-
-        ret = gnutls_x509_crt_get_version(cert);
-        if (ret > 0)
-                apr_table_setn(env,
-                               apr_pstrcat(r->pool, MGS_SIDE, "_M_VERSION",
-                                           NULL), apr_psprintf(r->pool,
-                                                               "%u", ret));
-
-        apr_table_setn(env,
-                       apr_pstrcat(r->pool, MGS_SIDE, "_CERT_TYPE", NULL),
-                       "X.509");
-
-        tmp =
-            mgs_time2sz(gnutls_x509_crt_get_expiration_time
-                        (cert), buf, sizeof(buf));
-        apr_table_setn(env, apr_pstrcat(r->pool, MGS_SIDE, "_V_END", NULL),
-                       apr_pstrdup(r->pool, tmp));
-
-        tmp =
-            mgs_time2sz(gnutls_x509_crt_get_activation_time
-                        (cert), buf, sizeof(buf));
-        apr_table_setn(env,
-                       apr_pstrcat(r->pool, MGS_SIDE, "_V_START", NULL),
-                       apr_pstrdup(r->pool, tmp));
-
-        ret = gnutls_x509_crt_get_signature_algorithm(cert);
-        if (ret >= 0) {
-                apr_table_setn(env,
-                               apr_pstrcat(r->pool, MGS_SIDE, "_A_SIG",
-                                           NULL),
-                               gnutls_sign_algorithm_get_name(ret));
-        }
-
-        ret = gnutls_x509_crt_get_pk_algorithm(cert, NULL);
-        if (ret >= 0) {
-                apr_table_setn(env,
-                               apr_pstrcat(r->pool, MGS_SIDE, "_A_KEY",
-                                           NULL),
-                               gnutls_pk_algorithm_get_name(ret));
-        }
-
-        /* export all the alternative names (DNS, RFC822 and URI) */
-        for (i = 0; !(ret < 0); i++) {
-                len = 0;
-                ret = gnutls_x509_crt_get_subject_alt_name(cert, i,
-                                                           NULL, &len,
-                                                           NULL);
-
-                if (ret == GNUTLS_E_SHORT_MEMORY_BUFFER && len > 1) {
-                        tmp2 = apr_palloc(r->pool, len + 1);
-
-                        ret =
-                            gnutls_x509_crt_get_subject_alt_name(cert, i,
-                                                                 tmp2,
-                                                                 &len,
-                                                                 NULL);
-                        tmp2[len] = 0;
-
-                        if (ret == GNUTLS_SAN_DNSNAME) {
-                                apr_table_setn(env,
-                                               apr_psprintf(r->pool,
-                                                            "%s_S_AN%u",
-                                                            MGS_SIDE, i),
-                                               apr_psprintf(r->pool,
-                                                            "DNSNAME:%s",
-                                                            tmp2));
-                        } else if (ret == GNUTLS_SAN_RFC822NAME) {
-                                apr_table_setn(env,
-                                               apr_psprintf(r->pool,
-                                                            "%s_S_AN%u",
-                                                            MGS_SIDE, i),
-                                               apr_psprintf(r->pool,
-                                                            "RFC822NAME:%s",
-                                                            tmp2));
-                        } else if (ret == GNUTLS_SAN_URI) {
-                                apr_table_setn(env,
-                                               apr_psprintf(r->pool,
-                                                            "%s_S_AN%u",
-                                                            MGS_SIDE, i),
-                                               apr_psprintf(r->pool,
-                                                            "URI:%s",
-                                                            tmp2));
-                        } else {
-                                apr_table_setn(env,
-                                               apr_psprintf(r->pool,
-                                                            "%s_S_AN%u",
-                                                            MGS_SIDE, i),
-                                               "UNSUPPORTED");
-                        }
-                }
-        }
-}
-
-static void
-mgs_add_common_pgpcert_vars(request_rec * r, gnutls_openpgp_crt_t cert,
-                            int side, int export_certificates_enabled)
-{
-        unsigned char sbuf[64]; /* buffer to hold serials */
-        char buf[AP_IOBUFSIZE];
-        const char *tmp;
-        size_t len;
-        int ret;
-
-        if (r == NULL)
-                return;
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        apr_table_t *env = r->subprocess_env;
-
-        if (export_certificates_enabled != 0) {
-                char cert_buf[10 * 1024];
-                len = sizeof(cert_buf);
-
-                if (gnutls_openpgp_crt_export
-                    (cert, GNUTLS_OPENPGP_FMT_BASE64, cert_buf, &len) >= 0)
-                        apr_table_setn(env,
-                                       apr_pstrcat(r->pool, MGS_SIDE,
-                                                   "_CERT", NULL),
-                                       apr_pstrmemdup(r->pool, cert_buf,
-                                                      len));
-
-        }
-
-        len = sizeof(buf);
-        gnutls_openpgp_crt_get_name(cert, 0, buf, &len);
-        apr_table_setn(env, apr_pstrcat(r->pool, MGS_SIDE, "_NAME", NULL),
-                       apr_pstrmemdup(r->pool, buf, len));
-
-        len = sizeof(sbuf);
-        gnutls_openpgp_crt_get_fingerprint(cert, sbuf, &len);
-        tmp = mgs_session_id2sz(sbuf, len, buf, sizeof(buf));
-        apr_table_setn(env,
-                       apr_pstrcat(r->pool, MGS_SIDE, "_FINGERPRINT",
-                                   NULL), apr_pstrdup(r->pool, tmp));
-
-        ret = gnutls_openpgp_crt_get_version(cert);
-        if (ret > 0)
-                apr_table_setn(env,
-                               apr_pstrcat(r->pool, MGS_SIDE, "_M_VERSION",
-                                           NULL), apr_psprintf(r->pool,
-                                                               "%u", ret));
-
-        apr_table_setn(env,
-                       apr_pstrcat(r->pool, MGS_SIDE, "_CERT_TYPE", NULL),
-                       "OPENPGP");
-
-        tmp =
-            mgs_time2sz(gnutls_openpgp_crt_get_expiration_time
-                        (cert), buf, sizeof(buf));
-        apr_table_setn(env, apr_pstrcat(r->pool, MGS_SIDE, "_V_END", NULL),
-                       apr_pstrdup(r->pool, tmp));
-
-        tmp =
-            mgs_time2sz(gnutls_openpgp_crt_get_creation_time
-                        (cert), buf, sizeof(buf));
-        apr_table_setn(env,
-                       apr_pstrcat(r->pool, MGS_SIDE, "_V_START", NULL),
-                       apr_pstrdup(r->pool, tmp));
-
-        ret = gnutls_openpgp_crt_get_pk_algorithm(cert, NULL);
-        if (ret >= 0) {
-                apr_table_setn(env,
-                               apr_pstrcat(r->pool, MGS_SIDE, "_A_KEY",
-                                           NULL),
-                               gnutls_pk_algorithm_get_name(ret));
-        }
-
-}
-
-/* TODO: Allow client sending a X.509 certificate chain */
-static int mgs_cert_verify(request_rec * r, mgs_handle_t * ctxt)
-{
-        const gnutls_datum_t *cert_list;
-        unsigned int cert_list_size, status;
-        int rv = GNUTLS_E_NO_CERTIFICATE_FOUND, ret;
-        unsigned int ch_size = 0;
-        union {
-                gnutls_x509_crt_t x509[MAX_CHAIN_SIZE];
-                gnutls_openpgp_crt_t pgp;
-        } cert;
-        apr_time_t expiration_time, cur_time;
-
-        if (r == NULL || ctxt == NULL || ctxt->session == NULL)
-                return HTTP_FORBIDDEN;
-
-        _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
-        cert_list =
-            gnutls_certificate_get_peers(ctxt->session, &cert_list_size);
-
-        if (cert_list == NULL || cert_list_size == 0) {
-                /* It is perfectly OK for a client not to send a certificate if on REQUEST mode
-                 */
-                if (ctxt->sc->client_verify_mode == GNUTLS_CERT_REQUEST)
-                        return OK;
-
-                /* no certificate provided by the client, but one was required. */
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                              "GnuTLS: Failed to Verify Peer: "
-                              "Client did not submit a certificate");
-                return HTTP_FORBIDDEN;
-        }
-
-        if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_X509) {
-                ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
-                              "GnuTLS: A Chain of %d certificate(s) was provided for validation",
-                              cert_list_size);
-
-                for (ch_size = 0; ch_size < cert_list_size; ch_size++) {
-                        gnutls_x509_crt_init(&cert.x509[ch_size]);
-                        rv = gnutls_x509_crt_import(cert.x509[ch_size],
-                                                    &cert_list[ch_size],
-                                                    GNUTLS_X509_FMT_DER);
-                        // When failure to import, leave the loop
-                        if (rv != GNUTLS_E_SUCCESS) {
-                                if (ch_size < 1) {
-                                        ap_log_rerror(APLOG_MARK,
-                                                      APLOG_INFO, 0, r,
-                                                      "GnuTLS: Failed to Verify Peer: "
-                                                      "Failed to import peer certificates.");
-                                        ret = HTTP_FORBIDDEN;
-                                        goto exit;
-                                }
-                                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                                              "GnuTLS: Failed to import some peer certificates. Using %d certificates",
-                                              ch_size);
-                                rv = GNUTLS_E_SUCCESS;
-                                break;
-                        }
-                }
-        } else if (gnutls_certificate_type_get(ctxt->session) ==
-                   GNUTLS_CRT_OPENPGP) {
-                if (cert_list_size > 1) {
-                        ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                                      "GnuTLS: Failed to Verify Peer: "
-                                      "Chained Client Certificates are not supported.");
-                        return HTTP_FORBIDDEN;
-                }
-
-                gnutls_openpgp_crt_init(&cert.pgp);
-                rv = gnutls_openpgp_crt_import(cert.pgp, &cert_list[0],
-                                               GNUTLS_OPENPGP_FMT_RAW);
-
-        } else
-                return HTTP_FORBIDDEN;
-
-        if (rv < 0) {
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                              "GnuTLS: Failed to Verify Peer: "
-                              "Failed to import peer certificates.");
-                ret = HTTP_FORBIDDEN;
-                goto exit;
-        }
-
-        if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_X509) {
-                apr_time_ansi_put(&expiration_time,
-                                  gnutls_x509_crt_get_expiration_time
-                                  (cert.x509[0]));
-
-                ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
-                              "GnuTLS: Verifying list of  %d certificate(s)",
-                              ch_size);
-                rv = gnutls_x509_crt_list_verify(cert.x509, ch_size,
-                                                 ctxt->sc->ca_list,
-                                                 ctxt->sc->ca_list_size,
-                                                 NULL, 0, 0, &status);
-        } else {
-                apr_time_ansi_put(&expiration_time,
-                                  gnutls_openpgp_crt_get_expiration_time
-                                  (cert.pgp));
-
-                rv = gnutls_openpgp_crt_verify_ring(cert.pgp,
-                                                    ctxt->sc->pgp_list, 0,
-                                                    &status);
-        }
-
-        if (rv < 0) {
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                              "GnuTLS: Failed to Verify Peer certificate: (%d) %s",
-                              rv, gnutls_strerror(rv));
-                if (rv == GNUTLS_E_NO_CERTIFICATE_FOUND)
-                        ap_log_rerror(APLOG_MARK, APLOG_EMERG, 0, r,
-                                      "GnuTLS: No certificate was found for verification. Did you set the GnuTLSX509CAFile or GnuTLSPGPKeyringFile directives?");
-                ret = HTTP_FORBIDDEN;
-                goto exit;
-        }
-
-        /* TODO: X509 CRL Verification. */
-        /* May add later if anyone needs it.
-         */
-        /* ret = gnutls_x509_crt_check_revocation(crt, crl_list, crl_list_size); */
-
-        cur_time = apr_time_now();
-
-        if (status & GNUTLS_CERT_SIGNER_NOT_FOUND) {
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                              "GnuTLS: Could not find Signer for Peer Certificate");
-        }
-
-        if (status & GNUTLS_CERT_SIGNER_NOT_CA) {
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                              "GnuTLS: Peer's Certificate signer is not a CA");
-        }
-
-        if (status & GNUTLS_CERT_INSECURE_ALGORITHM) {
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                              "GnuTLS: Peer's Certificate is using insecure algorithms");
-        }
-
-        if (status & GNUTLS_CERT_EXPIRED
-            || status & GNUTLS_CERT_NOT_ACTIVATED) {
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                              "GnuTLS: Peer's Certificate signer is expired or not yet activated");
-        }
-
-        if (status & GNUTLS_CERT_INVALID) {
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                              "GnuTLS: Peer Certificate is invalid.");
-        } else if (status & GNUTLS_CERT_REVOKED) {
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                              "GnuTLS: Peer Certificate is revoked.");
-        }
-
-        if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_X509)
-                mgs_add_common_cert_vars(r, cert.x509[0], 1,
-                                         ctxt->
-                                         sc->export_certificates_enabled);
-        else if (gnutls_certificate_type_get(ctxt->session) ==
-                 GNUTLS_CRT_OPENPGP)
-                mgs_add_common_pgpcert_vars(r, cert.pgp, 1,
-                                            ctxt->
-                                            sc->export_certificates_enabled);
-
-        {
-                /* days remaining */
-                unsigned long remain =
-                    (apr_time_sec(expiration_time) -
-                     apr_time_sec(cur_time)) / 86400;
-                apr_table_setn(r->subprocess_env, "SSL_CLIENT_V_REMAIN",
-                               apr_psprintf(r->pool, "%lu", remain));
-        }
-
-        if (status == 0) {
-                apr_table_setn(r->subprocess_env, "SSL_CLIENT_VERIFY",
-                               "SUCCESS");
-                ret = OK;
-        } else {
-                apr_table_setn(r->subprocess_env, "SSL_CLIENT_VERIFY",
-                               "FAILED");
-                if (ctxt->sc->client_verify_mode == GNUTLS_CERT_REQUEST)
-                        ret = OK;
-                else
-                        ret = HTTP_FORBIDDEN;
-        }
-
-      exit:
-        if (gnutls_certificate_type_get(ctxt->session) == GNUTLS_CRT_X509) {
-                int i;
-                for (i = 0; i < ch_size; i++) {
-                        gnutls_x509_crt_deinit(cert.x509[i]);
-                }
-        } else if (gnutls_certificate_type_get(ctxt->session) ==
-                   GNUTLS_CRT_OPENPGP)
-                gnutls_openpgp_crt_deinit(cert.pgp);
-        return ret;
-
-
-}
+    mgs_srvconf_rec *sc;
+
+    if (r == NULL)
+        return OK;
+
+    sc = (mgs_srvconf_rec *) ap_get_module_config(r->server->module_config, &gnutls_module);
+
+    _gnutls_log(debug_log_fp, "%s: %d\n", __func__, __LINE__);
+
+    ap_rputs("<hr>\n", r);
+    ap_rputs("<h2>GnuTLS Information:</h2>\n<dl>\n", r);
+
+    ap_rprintf(r, "<dt>GnuTLS version:</dt><dd>%s</dd>\n", gnutls_check_version(NULL));
+    ap_rputs("<dt>Built against:</dt><dd>" GNUTLS_VERSION "</dd>\n", r);
+    ap_rprintf(r, "<dt>using TLS:</dt><dd>%s</dd>\n", (sc->enabled == GNUTLS_ENABLED_FALSE ? "no" : "yes"));
+    if (sc->enabled != GNUTLS_ENABLED_FALSE) {
+        mgs_handle_t* ctxt;
+        ctxt = ap_get_module_config(r->connection->conn_config, &gnutls_module);
+        if (ctxt && ctxt->session != NULL) {
+#if GNUTLS_VERSION_MAJOR < 3
+            ap_rprintf(r, "<dt>This TLS Session:</dt><dd>%s</dd>\n",
+                gnutls_cipher_suite_get_name(gnutls_kx_get(ctxt->session),
+                gnutls_cipher_get(ctxt->session),
+                gnutls_mac_get(ctxt->session)));
+#else
+            char* z = NULL;
+            z = gnutls_session_get_desc(ctxt->session);
+            if (z) {
+                ap_rprintf(r, "<dt>This TLS Session:</dt><dd>%s</dd>\n", z);
+                gnutls_free(z);
+            }
+#endif
+        }
+    }
+
+    ap_rputs("</dl>\n", r);
+    return OK;
+}
+