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- provos@cvs.openbsd.org 2001/06/25 17:54:47 

[auth.c auth.h auth-rsa.c]
     terminate secure_filename checking after checking homedir.  that way
     it works on AFS.  okay markus@
This commit is contained in:
Ben Lindstrom 2001-07-04 03:40:39 +00:00
parent bda98b0091
commit 248c0784bf
4 changed files with 23 additions and 7 deletions
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6
ChangeLog
View File

@ -9,6 +9,10 @@
[ssh-keygen.1]
sshd(8) will never read the private keys, but ssh(1) does;
hugh@mimosa.com
- provos@cvs.openbsd.org 2001/06/25 17:54:47
[auth.c auth.h auth-rsa.c]
terminate secure_filename checking after checking homedir. that way
it
20010629
- (bal) Removed net_aton() since we don't use it any more
@ -5836,4 +5840,4 @@
- Wrote replacements for strlcpy and mkdtemp
- Released 1.0pre1
$Id: ChangeLog,v 1.1346 2001/07/04 03:35:24 mouring Exp $
$Id: ChangeLog,v 1.1347 2001/07/04 03:40:39 mouring Exp $

4
auth-rsa.c
View File

@ -14,7 +14,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: auth-rsa.c,v 1.42 2001/06/22 21:55:48 markus Exp $");
RCSID("$OpenBSD: auth-rsa.c,v 1.43 2001/06/25 17:54:47 provos Exp $");
#include <openssl/rsa.h>
#include <openssl/md5.h>
@ -159,7 +159,7 @@ auth_rsa(struct passwd *pw, BIGNUM *client_n)
return 0;
}
if (options.strict_modes &&
secure_filename(f, file, pw->pw_uid, line, sizeof(line)) != 0) {
secure_filename(f, file, pw, line, sizeof(line)) != 0) {
xfree(file);
fclose(f);
log("Authentication refused: %s", line);

15
auth.c
View File

@ -23,7 +23,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: auth.c,v 1.24 2001/06/23 00:20:57 markus Exp $");
RCSID("$OpenBSD: auth.c,v 1.25 2001/06/25 17:54:48 provos Exp $");
#ifdef HAVE_LOGIN_H
#include <login.h>
@ -351,12 +351,17 @@ check_key_in_hostfiles(struct passwd *pw, Key *key, const char *host,
* Returns 0 on success and -1 on failure
*/
int
secure_filename(FILE *f, const char *file, uid_t uid, char *err, size_t errlen)
secure_filename(FILE *f, const char *file, struct passwd *pw,
char *err, size_t errlen)
{
uid_t uid = pw->pw_uid;
char homedir[MAXPATHLEN];
char buf[MAXPATHLEN];
char *cp;
struct stat st;
strlcpy(homedir, dirname(pw->pw_dir), sizeof(homedir));
if (realpath(file, buf) == NULL) {
snprintf(err, errlen, "realpath %s failed: %s", file,
strerror(errno));
@ -372,6 +377,8 @@ secure_filename(FILE *f, const char *file, uid_t uid, char *err, size_t errlen)
return -1;
}
debug3("secure_filename: terminating check at '%s'", homedir);
/* for each component of the canonical path, walking upwards */
for (;;) {
if ((cp = dirname(buf)) == NULL) {
@ -380,6 +387,10 @@ secure_filename(FILE *f, const char *file, uid_t uid, char *err, size_t errlen)
}
strlcpy(buf, cp, sizeof(buf));
/* If are passed the homedir then we can stop */
if (strcmp(buf, homedir) == 0)
break;
debug3("secure_filename: checking '%s'", buf);
if (stat(buf, &st) < 0 ||
(st.st_uid != 0 && st.st_uid != uid) ||

5
auth.h
View File

@ -21,7 +21,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $OpenBSD: auth.h,v 1.18 2001/06/23 00:20:58 markus Exp $
* $OpenBSD: auth.h,v 1.19 2001/06/25 17:54:49 provos Exp $
*/
#ifndef AUTH_H
#define AUTH_H
@ -168,7 +168,8 @@ char *authorized_keys_file2(struct passwd *pw);
/* check a file and the path to it */
int
secure_filename(FILE *f, const char *file, uid_t u, char *err, size_t errlen);
secure_filename(FILE *f, const char *file, struct passwd *pw,
char *err, size_t errlen);
/* helper for hostbased auth */
HostStatus