+/* $OpenBSD: auth-passwd.c,v 1.43 2007/09/21 08:15:29 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
*/
#include "includes.h"
-RCSID("$OpenBSD: auth-passwd.c,v 1.30 2003/11/04 08:54:09 djm Exp $");
+
+#include <sys/types.h>
+
+#include <pwd.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
#include "packet.h"
+#include "buffer.h"
#include "log.h"
#include "servconf.h"
+#include "key.h"
+#include "hostfile.h"
#include "auth.h"
-#ifdef WITH_AIXAUTHENTICATE
-# include "buffer.h"
-# include "canohost.h"
+#include "auth-options.h"
+
extern Buffer loginmsg;
+extern ServerOptions options;
+
+#ifdef HAVE_LOGIN_CAP
+extern login_cap_t *lc;
#endif
-extern ServerOptions options;
+
+#define DAY (24L * 60 * 60) /* 1 day in seconds */
+#define TWO_WEEKS (2L * 7 * DAY) /* 2 weeks in seconds */
+
+void
+disable_forwarding(void)
+{
+ no_port_forwarding_flag = 1;
+ no_agent_forwarding_flag = 1;
+ no_x11_forwarding_flag = 1;
+}
/*
* Tries to authenticate the user using password. Returns true if
auth_password(Authctxt *authctxt, const char *password)
{
struct passwd * pw = authctxt->pw;
- int ok = authctxt->valid;
+ int result, ok = authctxt->valid;
+#if defined(USE_SHADOW) && defined(HAS_SHADOW_EXPIRE)
+ static int expire_checked = 0;
+#endif
#ifndef HAVE_CYGWIN
if (pw->pw_uid == 0 && options.permit_root_login != PERMIT_YES)
if (*password == '\0' && options.permit_empty_passwd == 0)
return 0;
-#if defined(HAVE_OSF_SIA)
- return auth_sia_password(authctxt, password) && ok;
-#else
-# ifdef KRB5
+#ifdef KRB5
if (options.kerberos_authentication == 1) {
int ret = auth_krb5_password(authctxt, password);
if (ret == 1 || ret == 0)
return ret && ok;
/* Fall back to ordinary passwd authentication. */
}
-# endif
-# ifdef HAVE_CYGWIN
- if (is_winnt) {
+#endif
+#ifdef HAVE_CYGWIN
+ {
HANDLE hToken = cygwin_logon_user(pw, password);
if (hToken == INVALID_HANDLE_VALUE)
cygwin_set_impersonation_token(hToken);
return ok;
}
-# endif
-# ifdef WITH_AIXAUTHENTICATE
- {
- char *authmsg = NULL;
- int reenter = 1;
- int authsuccess = 0;
-
- if (authenticate(pw->pw_name, password, &reenter,
- &authmsg) == 0 && ok) {
- char *msg;
- char *host =
- (char *)get_canonical_hostname(options.use_dns);
-
- authsuccess = 1;
- aix_remove_embedded_newlines(authmsg);
-
- debug3("AIX/authenticate succeeded for user %s: %.100s",
- pw->pw_name, authmsg);
-
- /* No pty yet, so just label the line as "ssh" */
- aix_setauthdb(authctxt->user);
- if (loginsuccess(authctxt->user, host, "ssh",
- &msg) == 0) {
- if (msg != NULL) {
- debug("%s: msg %s", __func__, msg);
- buffer_append(&loginmsg, msg,
- strlen(msg));
- xfree(msg);
- }
- }
- } else {
- debug3("AIX/authenticate failed for user %s: %.100s",
- pw->pw_name, authmsg);
- }
+#endif
+#ifdef USE_PAM
+ if (options.use_pam)
+ return (sshpam_auth_passwd(authctxt, password) && ok);
+#endif
+#if defined(USE_SHADOW) && defined(HAS_SHADOW_EXPIRE)
+ if (!expire_checked) {
+ expire_checked = 1;
+ if (auth_shadow_pwexpired(authctxt))
+ authctxt->force_pwchange = 1;
+ }
+#endif
+ result = sys_auth_passwd(authctxt, password);
+ if (authctxt->force_pwchange)
+ disable_forwarding();
+ return (result && ok);
+}
- if (authmsg != NULL)
- xfree(authmsg);
+#ifdef BSD_AUTH
+static void
+warn_expiry(Authctxt *authctxt, auth_session_t *as)
+{
+ char buf[256];
+ quad_t pwtimeleft, actimeleft, daysleft, pwwarntime, acwarntime;
+
+ pwwarntime = acwarntime = TWO_WEEKS;
+
+ pwtimeleft = auth_check_change(as);
+ actimeleft = auth_check_expire(as);
+#ifdef HAVE_LOGIN_CAP
+ if (authctxt->valid) {
+ pwwarntime = login_getcaptime(lc, "password-warn", TWO_WEEKS,
+ TWO_WEEKS);
+ acwarntime = login_getcaptime(lc, "expire-warn", TWO_WEEKS,
+ TWO_WEEKS);
+ }
+#endif
+ if (pwtimeleft != 0 && pwtimeleft < pwwarntime) {
+ daysleft = pwtimeleft / DAY + 1;
+ snprintf(buf, sizeof(buf),
+ "Your password will expire in %lld day%s.\n",
+ daysleft, daysleft == 1 ? "" : "s");
+ buffer_append(&loginmsg, buf, strlen(buf));
+ }
+ if (actimeleft != 0 && actimeleft < acwarntime) {
+ daysleft = actimeleft / DAY + 1;
+ snprintf(buf, sizeof(buf),
+ "Your account will expire in %lld day%s.\n",
+ daysleft, daysleft == 1 ? "" : "s");
+ buffer_append(&loginmsg, buf, strlen(buf));
+ }
+}
- return authsuccess;
+int
+sys_auth_passwd(Authctxt *authctxt, const char *password)
+{
+ struct passwd *pw = authctxt->pw;
+ auth_session_t *as;
+ static int expire_checked = 0;
+
+ as = auth_usercheck(pw->pw_name, authctxt->style, "auth-ssh",
+ (char *)password);
+ if (as == NULL)
+ return (0);
+ if (auth_getstate(as) & AUTH_PWEXPIRED) {
+ auth_close(as);
+ disable_forwarding();
+ authctxt->force_pwchange = 1;
+ return (1);
+ } else {
+ if (!expire_checked) {
+ expire_checked = 1;
+ warn_expiry(authctxt, as);
+ }
+ return (auth_close(as));
}
-# endif
-# ifdef BSD_AUTH
- if (auth_userokay(pw->pw_name, authctxt->style, "auth-ssh",
- (char *)password) == 0)
- return 0;
- else
- return ok;
-# else
- {
+}
+#elif !defined(CUSTOM_SYS_AUTH_PASSWD)
+int
+sys_auth_passwd(Authctxt *authctxt, const char *password)
+{
+ struct passwd *pw = authctxt->pw;
+ char *encrypted_password;
+
/* Just use the supplied fake password if authctxt is invalid */
char *pw_password = authctxt->valid ? shadow_pw(pw) : pw->pw_passwd;
/* Check for users with no password. */
if (strcmp(pw_password, "") == 0 && strcmp(password, "") == 0)
- return ok;
- else {
- /* Encrypt the candidate password using the proper salt. */
- char *encrypted_password = xcrypt(password,
- (pw_password[0] && pw_password[1]) ? pw_password : "xx");
-
- /*
- * Authentication is accepted if the encrypted passwords
- * are identical.
- */
- return (strcmp(encrypted_password, pw_password) == 0) && ok;
- }
+ return (1);
- }
-# endif
-#endif /* !HAVE_OSF_SIA */
+ /* Encrypt the candidate password using the proper salt. */
+ encrypted_password = xcrypt(password,
+ (pw_password[0] && pw_password[1]) ? pw_password : "xx");
+
+ /*
+ * Authentication is accepted if the encrypted passwords
+ * are identical.
+ */
+ return (strcmp(encrypted_password, pw_password) == 0);
}
+#endif
andersk / openssh.git / blobdiff