X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=lib%2Fstream-ssl.c;h=aeca21ecc0fdd555507ddd749fdf3f9d6ba86118;hb=7103dec49eb569c3196239da6c178a29c3003e2b;hp=215934d160f27c83bfd822ab2066f7a8ffdb2c2f;hpb=a0bc29a541fc7dc6e20137d5558e2094d614e6ab;p=openvswitch

diff --git a/lib/stream-ssl.c b/lib/stream-ssl.c
index 215934d1..aeca21ec 100644
--- a/lib/stream-ssl.c
+++ b/lib/stream-ssl.c
@@ -141,6 +141,11 @@ static struct ssl_config_file private_key;
 static struct ssl_config_file certificate;
 static struct ssl_config_file ca_cert;
 
+/* Ordinarily, the SSL client and server verify each other's certificates using
+ * a CA certificate.  Setting this to false disables this behavior.  (This is a
+ * security risk.) */
+static bool verify_peer_cert = true;
+
 /* Ordinarily, we require a CA certificate for the peer to be locally
  * available.  We can, however, bootstrap the CA certificate from the peer at
  * the beginning of our first connection then use that certificate on all
@@ -204,7 +209,7 @@ new_ssl_stream(const char *name, int fd, enum session_type type,
         VLOG_ERR("Certificate must be configured to use SSL");
         retval = ENOPROTOOPT;
     }
-    if (!ca_cert.read && !bootstrap_ca_cert) {
+    if (!ca_cert.read && verify_peer_cert && !bootstrap_ca_cert) {
         VLOG_ERR("CA certificate must be configured to use SSL");
         retval = ENOPROTOOPT;
     }
@@ -243,7 +248,7 @@ new_ssl_stream(const char *name, int fd, enum session_type type,
         retval = ENOPROTOOPT;
         goto error;
     }
-    if (bootstrap_ca_cert && type == CLIENT) {
+    if (!verify_peer_cert || (bootstrap_ca_cert && type == CLIENT)) {
         SSL_set_verify(ssl, SSL_VERIFY_NONE, NULL);
     }
 
@@ -334,10 +339,9 @@ do_ca_cert_bootstrap(struct stream *stream)
     fd = open(ca_cert.file_name, O_CREAT | O_EXCL | O_WRONLY, 0444);
     if (fd < 0) {
         if (errno == EEXIST) {
-            VLOG_INFO("CA cert %s created by another process",
+            VLOG_INFO("reading CA cert %s created by another process",
                       ca_cert.file_name);
-            /* We'll read it the next time around the main loop because
-             * update_ssl_config() will see that it now exists. */
+            stream_ssl_set_ca_cert_file(ca_cert.file_name, true);
             return EPROTO;
         } else {
             VLOG_ERR("could not bootstrap CA cert: creating %s failed: %s",
@@ -426,9 +430,10 @@ ssl_connect(struct stream *stream)
             }
         } else if (bootstrap_ca_cert) {
             return do_ca_cert_bootstrap(stream);
-        } else if ((SSL_get_verify_mode(sslv->ssl)
-                    & (SSL_VERIFY_NONE | SSL_VERIFY_PEER))
-                   != SSL_VERIFY_PEER) {
+        } else if (verify_peer_cert
+                   && ((SSL_get_verify_mode(sslv->ssl)
+                       & (SSL_VERIFY_NONE | SSL_VERIFY_PEER))
+                       != SSL_VERIFY_PEER)) {
             /* Two or more SSL connections completed at the same time while we
              * were in bootstrap mode.  Only one of these can finish the
              * bootstrap successfully.  The other one(s) must be rejected
@@ -949,9 +954,12 @@ update_ssl_config(struct ssl_config_file *config, const char *file_name)
         return false;
     }
 
+    /* Update 'config'. */
     config->mtime = mtime;
-    free(config->file_name);
-    config->file_name = xstrdup(file_name);
+    if (file_name != config->file_name) {
+        free(config->file_name);
+        config->file_name = xstrdup(file_name);
+    }
     return true;
 }
 
@@ -1107,7 +1115,11 @@ stream_ssl_set_ca_cert_file__(const char *file_name, bool bootstrap)
     size_t n_certs;
     struct stat s;
 
-    if (bootstrap && stat(file_name, &s) && errno == ENOENT) {
+    if (!strcmp(file_name, "none")) {
+        verify_peer_cert = false;
+        VLOG_WARN("Peer certificate validation disabled "
+                  "(this is a security risk)");
+    } else if (bootstrap && stat(file_name, &s) && errno == ENOENT) {
         bootstrap_ca_cert = true;
     } else if (!read_cert_file(file_name, &certs, &n_certs)) {
         size_t i;