set the docroot to the current working directory if none is specified, fixes random...

[project/uhttpd.git] / auth.c

diff --git a/auth.c b/auth.c
index 05bec66..0c4872f 100644 (file)
--- a/auth.c
+++ b/auth.c
@@ -1,22 +1,28 @@
 /*
  * uhttpd - Tiny single-threaded httpd
  *
- *   Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
- *   Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *   Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
+ *   Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
  *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
  *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#define _GNU_SOURCE
+#define _XOPEN_SOURCE  700
+#include <strings.h>
+#ifdef HAVE_SHADOW
+#include <shadow.h>
+#endif
 #include "uhttpd.h"
 
 static LIST_HEAD(auth_realms);
@@ -66,3 +72,64 @@ void uh_auth_add(const char *path, const char *user, const char *pass)
        new->pass = strcpy(dest_pass, new_pass);
        list_add(&new->list, &auth_realms);
 }
+
+bool uh_auth_check(struct client *cl, struct path_info *pi)
+{
+       struct http_request *req = &cl->request;
+       struct auth_realm *realm;
+       bool user_match = false;
+       char *user = NULL;
+       char *pass = NULL;
+       int plen;
+
+       if (pi->auth && !strncasecmp(pi->auth, "Basic ", 6)) {
+               const char *auth = pi->auth + 6;
+
+               uh_b64decode(uh_buf, sizeof(uh_buf), auth, strlen(auth));
+               pass = strchr(uh_buf, ':');
+               if (pass) {
+                       user = uh_buf;
+                       *pass++ = 0;
+               }
+       }
+
+       req->realm = NULL;
+       plen = strlen(pi->name);
+       list_for_each_entry(realm, &auth_realms, list) {
+               int rlen = strlen(realm->path);
+
+               if (plen < rlen)
+                       continue;
+
+               if (strncasecmp(pi->name, realm->path, rlen) != 0)
+                       continue;
+
+               req->realm = realm;
+               if (!user)
+                       break;
+
+               if (strcmp(user, realm->user) != 0)
+                       continue;
+
+               user_match = true;
+               break;
+       }
+
+       if (!req->realm)
+               return true;
+
+       if (user_match &&
+           (!strcmp(pass, realm->pass) ||
+            !strcmp(crypt(pass, realm->pass), realm->pass)))
+               return true;
+
+       uh_http_header(cl, 401, "Authorization Required");
+       ustream_printf(cl->us,
+                                 "WWW-Authenticate: Basic realm=\"%s\"\r\n"
+                                 "Content-Type: text/plain\r\n\r\n",
+                                 conf.realm);
+       uh_chunk_printf(cl, "Authorization Required\n");
+       uh_request_done(cl);
+
+       return false;
+}