From c6caf2a06fb2e316ac8b23561955ea95f7bc7598 Mon Sep 17 00:00:00 2001
From: Mark Michelson <mmichelson@digium.com>
Date: Tue, 14 Oct 2008 21:08:48 +0000
Subject: Merged revisions 149130 via svnmerge from
 https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r149130 | mmichelson | 2008-10-14 15:49:02 -0500 (Tue, 14 Oct 2008) | 7 lines

Don't allow reserved characters to be used in register
lines in sip.conf.

(closes issue #13570)
Reported by: putnopvut


........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@149131 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 channels/chan_sip.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 19e1fafa0..f535e3ed8 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -212,6 +212,8 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 
 #define XMIT_ERROR		-2
 
+#define SIP_RESERVED ";/?:@&=+$,# "
+
 /* #define VOCAL_DATA_HACK */
 
 #define DEFAULT_DEFAULT_EXPIRY  120
@@ -6399,8 +6401,10 @@ static int sip_register(const char *value, int lineno)
 	enum sip_transport transport = SIP_TRANSPORT_UDP;
 	char buf[256] = "";
 	char *username = NULL;
+	char *port = NULL;
 	char *hostname=NULL, *secret=NULL, *authuser=NULL, *expire=NULL;
 	char *callback=NULL;
+	char *reserved = NULL;
 
 	if (!value)
 		return -1;
@@ -6425,6 +6429,15 @@ static int sip_register(const char *value, int lineno)
 		if (authuser)
 			*authuser++ = '\0';
 	}
+	if ((reserved = strpbrk(username, SIP_RESERVED))) {
+		goto invalid_char;
+	}
+	if (!ast_strlen_zero(secret) && (reserved = strpbrk(secret, SIP_RESERVED))) {
+		goto invalid_char;
+	}
+	if (!ast_strlen_zero(authuser) && (reserved = strpbrk(authuser, SIP_RESERVED))) {
+		goto invalid_char;
+	}
 	/* split host[:port][/contact] */
 	expire = strchr(hostname, '~');
 	if (expire)
@@ -6434,6 +6447,19 @@ static int sip_register(const char *value, int lineno)
 		*callback++ = '\0';
 	if (ast_strlen_zero(callback))
 		callback = "s";
+	/* Separate host from port when checking for reserved characters
+	 */
+	if ((port = strchr(hostname, ':'))) {
+		*port = '\0';
+	}
+	if ((reserved = strpbrk(hostname, SIP_RESERVED))) {
+		goto invalid_char;
+	}
+	/* And then re-merge the host and port so they are stored correctly
+	 */
+	if (port) {
+		*port = ':';
+	}
 	if (!(reg = ast_calloc(1, sizeof(*reg)))) {
 		ast_log(LOG_ERROR, "Out of memory. Can't allocate SIP registry entry\n");
 		return -1;
@@ -6467,6 +6493,10 @@ static int sip_register(const char *value, int lineno)
 	ASTOBJ_CONTAINER_LINK(&regl, reg); /* Add the new registry entry to the list */
 	registry_unref(reg, "unref the reg pointer");	/* release the reference given by ASTOBJ_INIT. The container has another reference */
 	return 0;
+
+invalid_char:
+	ast_log(LOG_WARNING, "A reserved character ('%c') was used in a \"register\" line. This registration will not occur\n", *reserved);
+	return -1;
 }
 
 /*! \brief Parse mwi=> line in sip.conf and add to list */
-- 
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