X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol_auth.c;h=385e54366dbd1bb4bad446446df0687503baf576;hp=d5b702d90bb4b49dfb4c4fb4a749921f5bf8029d;hb=8794274a30d535d49636fec825a0afbf30d8010d;hpb=5a161e86cf35351f5274d7a8e17fef4630b40686

diff --git a/src/protocol_auth.c b/src/protocol_auth.c
index d5b702d9..385e5436 100644
--- a/src/protocol_auth.c
+++ b/src/protocol_auth.c
@@ -1,7 +1,7 @@
 /*
     protocol_auth.c -- handle the meta-protocol, authentication
     Copyright (C) 1999-2005 Ivo Timmermans,
-                  2000-2012 Guus Sliepen <guus@tinc-vpn.org>
+                  2000-2013 Guus Sliepen <guus@tinc-vpn.org>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -126,7 +126,7 @@ static bool send_proxyrequest(connection_t *c) {
 }
 
 bool send_id(connection_t *c) {
-	if(proxytype)
+	if(proxytype && c->outgoing)
 		if(!send_proxyrequest(c))
 			return false;
 
@@ -215,7 +215,7 @@ bool send_metakey(connection_t *c) {
 
 	/* Copy random data to the buffer */
 
-	RAND_pseudo_bytes((unsigned char *)c->outkey, len);
+	RAND_bytes((unsigned char *)c->outkey, len);
 
 	/* The message we send must be smaller than the modulus of the RSA key.
 	   By definition, for a key of k bits, the following formula holds:
@@ -244,7 +244,7 @@ bool send_metakey(connection_t *c) {
 	 */
 
 	if(RSA_public_encrypt(len, (unsigned char *)c->outkey, (unsigned char *)buffer, c->rsa_key, RSA_NO_PADDING) != len) {
-		logger(LOG_ERR, "Error during encryption of meta key for %s (%s) %s",
+		logger(LOG_ERR, "Error during encryption of meta key for %s (%s): %s",
 			   c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL));
 		return false;
 	}
@@ -308,12 +308,15 @@ bool metakey_h(connection_t *c) {
 
 	/* Convert the challenge from hexadecimal back to binary */
 
-	hex2bin(buffer, buffer, len);
+	if(!hex2bin(buffer, buffer, len)) {
+		logger(LOG_ERR, "Got bad %s from %s(%s): %s", "METAKEY", c->name, c->hostname, "invalid key");
+		return false;
+	}
 
 	/* Decrypt the meta key */
 
 	if(RSA_private_decrypt(len, (unsigned char *)buffer, (unsigned char *)c->inkey, myself->connection->rsa_key, RSA_NO_PADDING) != len) {	/* See challenge() */
-		logger(LOG_ERR, "Error during decryption of meta key for %s (%s) %s",
+		logger(LOG_ERR, "Error during decryption of meta key for %s (%s): %s",
 			   c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL));
 		return false;
 	}
@@ -388,7 +391,7 @@ bool send_challenge(connection_t *c) {
 
 	/* Copy random data to the buffer */
 
-	RAND_pseudo_bytes((unsigned char *)c->hischallenge, len);
+	RAND_bytes((unsigned char *)c->hischallenge, len);
 
 	/* Convert to hex */
 
@@ -426,7 +429,10 @@ bool challenge_h(connection_t *c) {
 
 	/* Convert the challenge from hexadecimal back to binary */
 
-	hex2bin(buffer, c->mychallenge, len);
+	if(!hex2bin(buffer, c->mychallenge, len)) {
+		logger(LOG_ERR, "Got bad %s from %s(%s): %s", "CHALLENGE", c->name, c->hostname, "invalid challenge");
+		return false;
+	}
 
 	c->allow_request = CHAL_REPLY;
 
@@ -480,7 +486,10 @@ bool chal_reply_h(connection_t *c) {
 
 	/* Convert the hash to binary format */
 
-	hex2bin(hishash, hishash, c->outdigest->md_size);
+	if(!hex2bin(hishash, hishash, c->outdigest->md_size)) {
+		logger(LOG_ERR, "Got bad %s from %s(%s): %s", "CHAL_REPLY", c->name, c->hostname, "invalid hash");
+		return false;
+	}
 
 	/* Calculate the hash from the challenge we sent */