Add a 'trusted-cgi-referrer' directive

[privoxy.git] / cgi.c

diff --git a/cgi.c b/cgi.c
index 63eff59..7c84b69 100644 (file)
--- a/cgi.c
+++ b/cgi.c
@@ -1,4 +1,4 @@
-const char cgi_rcs[] = "$Id: cgi.c,v 1.166 2017/01/23 13:02:45 fabiankeil Exp $";
+const char cgi_rcs[] = "$Id: cgi.c,v 1.170 2017/01/23 16:12:18 fabiankeil Exp $";
 /*********************************************************************
  *
  * File        :  $Source: /cvsroot/ijbswa/current/cgi.c,v $
@@ -8,7 +8,7 @@ const char cgi_rcs[] = "$Id: cgi.c,v 1.166 2017/01/23 13:02:45 fabiankeil Exp $"
  *                This only contains the framework functions, the
  *                actual handler functions are declared elsewhere.
  *
- * Copyright   :  Written by and Copyright (C) 2001-2004, 2006-2008
+ * Copyright   :  Written by and Copyright (C) 2001-2017
  *                members of the Privoxy team. http://www.privoxy.org/
  *
  *                Based on the Internet Junkbuster originally written
@@ -441,6 +441,7 @@ static int referrer_is_safe(const struct client_state *csp)
 {
    char *referrer;
    static const char alternative_prefix[] = "http://" CGI_SITE_1_HOST "/";
+   const char *trusted_cgi_referrer = csp->config->trusted_cgi_referrer;
 
    referrer = grep_cgi_referrer(csp);
 
@@ -459,6 +460,18 @@ static int referrer_is_safe(const struct client_state *csp)
 
       return TRUE;
    }
+   else if ((trusted_cgi_referrer != NULL) && (0 == strncmp(referrer,
+            trusted_cgi_referrer, strlen(trusted_cgi_referrer))))
+   {
+      /*
+       * After some more testing this block should be merged with
+       * the previous one or the log level should bedowngraded.
+       */
+      log_error(LOG_LEVEL_INFO, "Granting access to %s based on trusted referrer %s",
+         csp->http->url, referrer);
+
+      return TRUE;
+   }
    else
    {
       /* Untrustworthy referrer */
@@ -1051,6 +1064,8 @@ jb_err cgi_error_disabled(const struct client_state *csp,
    assert(csp);
    assert(rsp);
 
+   rsp->status = strdup_or_die("403 Request not trusted or feature disabled");
+
    if (NULL == (exports = default_exports(csp, "cgi-error-disabled")))
    {
       return JB_ERR_MEMORY;
@@ -1387,7 +1402,7 @@ char *add_help_link(const char *item,
    }
    else
    {
-      string_append(&result, "https://");
+      string_append(&result, "http://");
       string_append(&result, CGI_SITE_2_HOST);
       string_append(&result, "/user-manual/");
    }