X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/351f5e2f6ccc21ca5ffbd06f0b1235eb6e907d43..fdd10da6f7995296f6bb5ee3dd7231d6dbc20b5e:/authenticate.c

diff --git a/authenticate.c b/authenticate.c
index ff7eef2c..5370cb78 100644
--- a/authenticate.c
+++ b/authenticate.c
@@ -1,23 +1,24 @@
-/* -*- c-file-style: "linux"; -*-
-
-   Copyright (C) 1998-2000 by Andrew Tridgell
-
-   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
-   the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
+/*
+ * Support rsync daemon authentication.
+ *
+ * Copyright (C) 1998-2000 Andrew Tridgell
+ * Copyright (C) 2002, 2004, 2005, 2006 Wayne Davison
+ *
+ * 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+ */
 
-/* support rsync authentication */
 #include "rsync.h"
 
 extern char *password_file;
@@ -26,15 +27,13 @@ extern char *password_file;
 encode a buffer using base64 - simple and slow algorithm. null terminates
 the result.
   ***************************************************************************/
-void base64_encode(char *buf, int len, char *out)
+void base64_encode(char *buf, int len, char *out, int pad)
 {
 	char *b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 	int bit_offset, byte_offset, idx, i;
 	unsigned char *d = (unsigned char *)buf;
 	int bytes = (len*8 + 5)/6;
 
-	memset(out, 0, bytes+1);
-
 	for (i = 0; i < bytes; i++) {
 		byte_offset = (i*6)/8;
 		bit_offset = (i*6)%8;
@@ -48,6 +47,11 @@ void base64_encode(char *buf, int len, char *out)
 		}
 		out[i] = b64[idx];
 	}
+
+	while (pad && (i % 4))
+		out[i++] = '=';
+
+	out[i] = '\0';
 }
 
 /* Generate a challenge buffer and return it base64-encoded. */
@@ -69,7 +73,7 @@ static void gen_challenge(char *addr, char *challenge)
 	sum_update(input, sizeof input);
 	sum_end(md4_out);
 
-	base64_encode(md4_out, MD4_SUM_LENGTH, challenge);
+	base64_encode(md4_out, MD4_SUM_LENGTH, challenge, 0);
 }
 
 
@@ -208,7 +212,7 @@ static void generate_hash(char *in, char *challenge, char *out)
 	sum_update(challenge, strlen(challenge));
 	sum_end(buf);
 
-	base64_encode(buf, MD4_SUM_LENGTH, out);
+	base64_encode(buf, MD4_SUM_LENGTH, out, 0);
 }
 
 /* Possibly negotiate authentication with the client.  Use "leader" to