From 8240f591e11b4c87c8f134515806d6cbd59bf9f2 Mon Sep 17 00:00:00 2001
From: Nokis Mavrogiannopoulos <nmav@gnutls.org>
Date: Sat, 08 Dec 2007 16:07:12 +0000
Subject: Added support for sending more than one certificate.

---
diff --git a/NEWS b/NEWS
index e4b908d..29bf060 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,7 @@
+** Version 0.4.2
+
+- Added support for sending a certificate chain.
+
 ** Version 0.4.1 (2007-12-03)
 
 - Added support for subject alternative names in certificates.
diff --git a/include/mod_gnutls.h.in b/include/mod_gnutls.h.in
index 6a311a3..a0f6581 100644
--- a/include/mod_gnutls.h.in
+++ b/include/mod_gnutls.h.in
@@ -80,7 +80,10 @@ typedef struct
 /* The maximum number of client CA certificates allowed.
  */
 #define MAX_CA_CRTS 128
-#define MAX_CIPHERS 16
+
+/* The maximum number of certificates to send in a chain
+ */
+#define MAX_CHAIN_SIZE 8
 
 typedef struct
 {
@@ -88,7 +91,8 @@ typedef struct
     gnutls_srp_server_credentials_t srp_creds;
     gnutls_anon_server_credentials_t anon_creds;
     char* cert_cn;
-    gnutls_x509_crt_t cert_x509;
+    gnutls_x509_crt_t certs_x509[MAX_CHAIN_SIZE]; /* A certificate chain */
+    unsigned int certs_x509_num;
     gnutls_x509_privkey_t privkey_x509;
     int enabled;
     /* whether to send the PEM encoded certificates
diff --git a/src/gnutls_config.c b/src/gnutls_config.c
index 7b5a42b..8d6308a 100644
--- a/src/gnutls_config.c
+++ b/src/gnutls_config.c
@@ -151,15 +151,10 @@ const char *mgs_set_cert_file(cmd_parms * parms, void *dummy,
 			    "Certificate '%s'", file);
     }
 
-    ret = gnutls_x509_crt_init(&sc->cert_x509);
-    if (ret < 0) {
-	return apr_psprintf(parms->pool, "GnuTLS: Failed to initialize"
-			    ": (%d) %s", ret, gnutls_strerror(ret));
-    }
-
+    sc->certs_x509_num = MAX_CHAIN_SIZE;
     ret =
-	gnutls_x509_crt_import(sc->cert_x509, &data, GNUTLS_X509_FMT_PEM);
-    if (ret != 0) {
+	gnutls_x509_crt_list_import(sc->certs_x509, &sc->certs_x509_num, &data, GNUTLS_X509_FMT_PEM, 0);
+    if (ret < 0) {
 	return apr_psprintf(parms->pool, "GnuTLS: Failed to Import "
 			    "Certificate '%s': (%d) %s", file, ret,
 			    gnutls_strerror(ret));
@@ -440,7 +435,8 @@ void *mgs_config_server_create(apr_pool_t * p, server_rec * s)
     sc->srp_tpasswd_conf_file = NULL;
     sc->srp_tpasswd_file = NULL;
     sc->privkey_x509 = NULL;
-    sc->cert_x509 = NULL;
+    memset( sc->certs_x509, 0, sizeof(sc->certs_x509));
+    sc->certs_x509_num = 0;
     sc->cache_timeout = apr_time_from_sec(300);
     sc->cache_type = mgs_cache_dbm;
     sc->cache_config = ap_server_root_relative(p, "conf/gnutls_cache");
diff --git a/src/gnutls_hooks.c b/src/gnutls_hooks.c
index 4364add..025e4e1 100644
--- a/src/gnutls_hooks.c
+++ b/src/gnutls_hooks.c
@@ -148,10 +148,10 @@ static int cert_retrieve_fn(gnutls_session_t session, gnutls_retr_st * ret)
     ctxt = gnutls_transport_get_ptr(session);
 
     ret->type = GNUTLS_CRT_X509;
-    ret->ncerts = 1;
+    ret->ncerts = ctxt->sc->certs_x509_num;
     ret->deinit_all = 0;
 
-    ret->cert.x509 = &ctxt->sc->cert_x509;
+    ret->cert.x509 = ctxt->sc->certs_x509;
     ret->key.x509 = ctxt->sc->privkey_x509;
     return 0;
 }
@@ -334,7 +334,7 @@ mgs_hook_post_config(apr_pool_t * p, apr_pool_t * plog,
 		}
 	    }
 
-	    if (sc->cert_x509 == NULL
+	    if (sc->certs_x509[0] == NULL
 		&& sc->enabled == GNUTLS_ENABLED_TRUE) {
 		ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s,
 			     "[GnuTLS] - Host '%s:%d' is missing a "
@@ -353,7 +353,7 @@ mgs_hook_post_config(apr_pool_t * p, apr_pool_t * plog,
 	    }
 
 	    if (sc->enabled == GNUTLS_ENABLED_TRUE) {
-		rv = read_crt_cn(s, p, sc->cert_x509, &sc->cert_cn);
+		rv = read_crt_cn(s, p, sc->certs_x509[0], &sc->cert_cn);
 		if (rv < 0) {
 		    ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s,
 				 "[GnuTLS] - Cannot find a certificate for host '%s:%d'!",
@@ -686,7 +686,7 @@ int mgs_hook_fixups(request_rec * r)
     tmp = mgs_session_id2sz(sbuf, len, buf, sizeof(buf));
     apr_table_setn(env, "SSL_SESSION_ID", apr_pstrdup(r->pool, tmp));
 
-    mgs_add_common_cert_vars(r, ctxt->sc->cert_x509, 0,
+    mgs_add_common_cert_vars(r, ctxt->sc->certs_x509[0], 0,
 			     ctxt->sc->export_certificates_enabled);
 
     return rv;
--
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