- (dtucker) [auth-pam.c] Do PAM chauthtok during SSH2 keyboard-interactive
authentication. Partially fixes bug #423. Feedback & ok djm@
Some background on why this is the way it is:
* Solaris 8's pam_chauthtok ignores the CHANGE_EXPIRED_AUTHTOK flag, so
we must call do_pam_account() to figure out if the password is expired.
* AIX 5.2 does not like having pam_acct_mgmt() called twice, once from the
authentication thread and once from the main shell child, so we cache the
result, which must be passed from the authentication thread back to the
monitor.
diff --git a/auth-pam.c b/auth-pam.c
index 621940a..2fe1e33 100644
--- a/auth-pam.c
+++ b/auth-pam.c
@@ -31,7 +31,7 @@
/* Based on $FreeBSD: src/crypto/openssh/auth2-pam-freebsd.c,v 1.11 2003/03/31 13:48:18 des Exp $ */
#include "includes.h"
-RCSID("$Id: auth-pam.c,v 1.84 2003/11/21 12:56:47 djm Exp $");
+RCSID("$Id: auth-pam.c,v 1.85 2003/12/18 04:34:32 dtucker Exp $");
#ifdef USE_PAM
#include <security/pam_appl.h>
@@ -53,6 +53,7 @@
extern ServerOptions options;
extern Buffer loginmsg;
+extern int compat20;
#define __unused
@@ -118,6 +119,7 @@
static int sshpam_new_authtok_reqd = 0;
static int sshpam_session_open = 0;
static int sshpam_cred_established = 0;
+static int sshpam_account_status = -1;
static char **sshpam_env = NULL;
struct pam_ctxt {
@@ -144,6 +146,21 @@
}
#endif
+void
+pam_password_change_required(int reqd)
+{
+ sshpam_new_authtok_reqd = reqd;
+ if (reqd) {
+ no_port_forwarding_flag |= 2;
+ no_agent_forwarding_flag |= 2;
+ no_x11_forwarding_flag |= 2;
+ } else {
+ no_port_forwarding_flag &= ~2;
+ no_agent_forwarding_flag &= ~2;
+ no_x11_forwarding_flag &= ~2;
+
+ }
+}
/* Import regular and PAM environment from subprocess */
static void
import_environments(Buffer *b)
@@ -152,6 +169,10 @@
u_int i, num_env;
int err;
+ /* Import variables set by do_pam_account */
+ sshpam_account_status = buffer_get_int(b);
+ pam_password_change_required(buffer_get_int(b));
+
/* Import environment from subprocess */
num_env = buffer_get_int(b);
sshpam_env = xmalloc((num_env + 1) * sizeof(*sshpam_env));
@@ -290,9 +311,26 @@
sshpam_err = pam_authenticate(sshpam_handle, 0);
if (sshpam_err != PAM_SUCCESS)
goto auth_fail;
+
+ /* if (compat20) { */
+ if (!do_pam_account())
+ goto auth_fail;
+ if (sshpam_new_authtok_reqd) {
+ sshpam_err = pam_chauthtok(sshpam_handle,
+ PAM_CHANGE_EXPIRED_AUTHTOK);
+ if (sshpam_err != PAM_SUCCESS)
+ goto auth_fail;
+ pam_password_change_required(0);
+ }
+ /* } */
+
buffer_put_cstring(&buffer, "OK");
#ifndef USE_POSIX_THREADS
+ /* Export variables set by do_pam_account */
+ buffer_put_int(&buffer, sshpam_account_status);
+ buffer_put_int(&buffer, sshpam_new_authtok_reqd);
+
/* Export any environment strings set in child */
for(i = 0; environ[i] != NULL; i++)
; /* Count */
@@ -611,22 +649,22 @@
u_int
do_pam_account(void)
{
+ if (sshpam_account_status != -1)
+ return (sshpam_account_status);
+
sshpam_err = pam_acct_mgmt(sshpam_handle, 0);
debug3("%s: pam_acct_mgmt = %d", __func__, sshpam_err);
-
- if (sshpam_err != PAM_SUCCESS && sshpam_err != PAM_NEW_AUTHTOK_REQD)
- return (0);
-
- if (sshpam_err == PAM_NEW_AUTHTOK_REQD) {
- sshpam_new_authtok_reqd = 1;
-
- /* Prevent forwardings until password changed */
- no_port_forwarding_flag |= 2;
- no_agent_forwarding_flag |= 2;
- no_x11_forwarding_flag |= 2;
+
+ if (sshpam_err != PAM_SUCCESS && sshpam_err != PAM_NEW_AUTHTOK_REQD) {
+ sshpam_account_status = 0;
+ return (sshpam_account_status);
}
- return (1);
+ if (sshpam_err == PAM_NEW_AUTHTOK_REQD)
+ pam_password_change_required(1);
+
+ sshpam_account_status = 1;
+ return (sshpam_account_status);
}
void