X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/37f9805dabba76b7a00bd2a0227762f6f239b598..d17e1dd2dae6bfd9e2e147a0dd3039848dd43abc:/authenticate.c

diff --git a/authenticate.c b/authenticate.c
index a4835a6d..b147112a 100644
--- a/authenticate.c
+++ b/authenticate.c
@@ -1,5 +1,6 @@
-/* 
-   Copyright (C) Andrew Tridgell 1998
+/* -*- 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
@@ -23,7 +24,7 @@
 encode a buffer using base64 - simple and slow algorithm. null terminates
 the result.
   ***************************************************************************/
-static void base64_encode(char *buf, int len, char *out)
+void base64_encode(char *buf, int len, char *out)
 {
 	char *b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 	int bit_offset, byte_offset, idx, i;
@@ -32,7 +33,7 @@ static void base64_encode(char *buf, int len, char *out)
 
 	memset(out, 0, bytes+1);
 
-	for (i=0;i<bytes;i++) {
+	for (i = 0; i < bytes; i++) {
 		byte_offset = (i*6)/8;
 		bit_offset = (i*6)%8;
 		if (bit_offset < 3) {
@@ -56,7 +57,7 @@ static void gen_challenge(char *addr, char *challenge)
 	memset(input, 0, sizeof(input));
 
 	strlcpy((char *)input, addr, 17);
-	gettimeofday(&tv, NULL);
+	sys_gettimeofday(&tv);
 	SIVAL(input, 16, tv.tv_sec);
 	SIVAL(input, 20, tv.tv_usec);
 	SIVAL(input, 24, getpid());
@@ -75,16 +76,37 @@ static int get_secret(int module, char *user, char *secret, int len)
 	int fd, found=0;
 	char line[MAXPATHLEN];
 	char *p, *pass=NULL;
+	STRUCT_STAT st;
+	int ok = 1;
+	extern int am_root;
 
 	if (!fname || !*fname) return 0;
 
 	fd = open(fname,O_RDONLY);
 	if (fd == -1) return 0;
 
+	if (do_stat(fname, &st) == -1) {
+		rsyserr(FERROR, errno, "stat(%s)", fname);
+		ok = 0;
+	} else if (lp_strict_modes(module)) {
+		if ((st.st_mode & 06) != 0) {
+			rprintf(FERROR,"secrets file must not be other-accessible (see strict modes option)\n");
+			ok = 0;
+		} else if (am_root && (st.st_uid != 0)) {
+			rprintf(FERROR,"secrets file must be owned by root when running as root (see strict modes)\n");
+			ok = 0;
+		}
+	}
+	if (!ok) {
+		rprintf(FERROR,"continuing without secrets file\n");
+		close(fd);
+		return 0;
+	}
+
 	while (!found) {
 		int i = 0;
-		memset(line, 0, sizeof(line));
-		while (i<(sizeof(line)-1)) {
+		memset(line, 0, sizeof line);
+		while ((size_t) i < (sizeof(line)-1)) {
 			if (read(fd, &line[i], 1) != 1) {
 				memset(line, 0, sizeof(line));
 				close(fd);
@@ -111,6 +133,54 @@ static int get_secret(int module, char *user, char *secret, int len)
 	return 1;
 }
 
+static char *getpassf(char *filename)
+{
+	char buffer[100];
+	int fd=0;
+	STRUCT_STAT st;
+	int ok = 1;
+	extern int am_root;
+	char *envpw=getenv("RSYNC_PASSWORD");
+
+	if (!filename) return NULL;
+
+	if ( (fd=open(filename,O_RDONLY)) == -1) {
+		rsyserr(FERROR, errno, "could not open password file \"%s\"",filename);
+		if (envpw) rprintf(FERROR,"falling back to RSYNC_PASSWORD environment variable.\n");	
+		return NULL;
+	}
+	
+	if (do_stat(filename, &st) == -1) {
+		rsyserr(FERROR, errno, "stat(%s)", filename);
+		ok = 0;
+	} else if ((st.st_mode & 06) != 0) {
+		rprintf(FERROR,"password file must not be other-accessible\n");
+		ok = 0;
+	} else if (am_root && (st.st_uid != 0)) {
+		rprintf(FERROR,"password file must be owned by root when running as root\n");
+		ok = 0;
+	}
+	if (!ok) {
+		rprintf(FERROR,"continuing without password file\n");
+		if (envpw) rprintf(FERROR,"using RSYNC_PASSWORD environment variable.\n");
+		close(fd);
+		return NULL;
+	}
+
+	if (envpw) rprintf(FERROR,"RSYNC_PASSWORD environment variable ignored\n");
+
+	buffer[sizeof(buffer)-1]='\0';
+	if (read(fd,buffer,sizeof(buffer)-1) > 0)
+	{
+		char *p = strtok(buffer,"\n\r");
+		close(fd);
+		if (p) p = strdup(p);
+		return p;
+	}	
+
+	return NULL;
+}
+
 /* generate a 16 byte hash from a password and challenge */
 static void generate_hash(char *in, char *challenge, char *out)
 {
@@ -133,7 +203,7 @@ static void generate_hash(char *in, char *challenge, char *out)
 
    otherwise return username
 */
-char *auth_server(int fd, int module, char *addr, char *leader)
+char *auth_server(int f_in, int f_out, int module, char *addr, char *leader)
 {
 	char *users = lp_auth_users(module);
 	char challenge[16];
@@ -152,9 +222,9 @@ char *auth_server(int fd, int module, char *addr, char *leader)
 	
 	base64_encode(challenge, 16, b64_challenge);
 
-	io_printf(fd,"%s%s\n", leader, b64_challenge);
+	io_printf(f_out, "%s%s\n", leader, b64_challenge);
 
-	if (!read_line(fd, line, sizeof(line)-1)) {
+	if (!read_line(f_in, line, sizeof(line)-1)) {
 		return NULL;
 	}
 
@@ -164,12 +234,12 @@ char *auth_server(int fd, int module, char *addr, char *leader)
 	if (sscanf(line,"%99s %29s", user, pass) != 2) {
 		return NULL;
 	}
-
+	
 	users = strdup(users);
 	if (!users) return NULL;
 
 	for (tok=strtok(users," ,\t"); tok; tok = strtok(NULL," ,\t")) {
-		if (strcmp(tok, user) == 0) break;
+		if (wildmatch(tok, user)) break;
 	}
 	free(users);
 
@@ -197,10 +267,20 @@ void auth_client(int fd, char *user, char *challenge)
 {
 	char *pass;
 	char pass2[30];
+	extern char *password_file;
 
 	if (!user || !*user) return;
 
-	if (!(pass=getenv("RSYNC_PASSWORD"))) {
+	if (!(pass=getpassf(password_file)) && !(pass=getenv("RSYNC_PASSWORD"))) {
+		/* XXX: cyeoh says that getpass is deprecated, because
+		 * it may return a truncated password on some systems,
+		 * and it is not in the LSB.
+                 *
+                 * Andrew Klein says that getpassphrase() is present
+                 * on Solaris and reads up to 256 characters.
+                 *
+                 * OpenBSD has a readpassphrase() that might be more suitable.
+                 */
 		pass = getpass("Password: ");
 	}
 
@@ -209,7 +289,7 @@ void auth_client(int fd, char *user, char *challenge)
 	}
 
 	generate_hash(pass, challenge, pass2);
-	
 	io_printf(fd, "%s %s\n", user, pass2);
 }
 
+