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r23704: Add pam_pwd_expire feature as discussed on samba-technical.

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This is a slightly modified version to set warn_pwd_expire to the
default value if 0, no, or a broken value is set.

This version also has one if statement less in get_config_item_int().

Thanks a lot to Andreas 'GlaDiaC' Schneider for this feature!
This commit is contained in:
Lars Müller 2007-07-04 14:03:10 +00:00 committed by Gerald (Jerry) Carter
parent c85311b3a8
commit d26914c978
3 changed files with 98 additions and 11 deletions
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3
examples/pam_winbind/pam_winbind.conf
View File

@ -28,5 +28,8 @@
# (can also take a name)
;require_membership_of =
# password expiry warning period in days
;warn_pwd_expire = 14
# omit pam conversations
;silent = no

104
source/nsswitch/pam_winbind.c
View File

@ -561,7 +561,12 @@ static int pam_winbind_request_log(pam_handle_t * pamh,
* @return boolean Returns True if message has been sent, False if not.
*/
static BOOL _pam_send_password_expiry_message(pam_handle_t *pamh, int ctrl, time_t next_change, time_t now, BOOL *already_expired)
static BOOL _pam_send_password_expiry_message(pam_handle_t *pamh,
int ctrl,
time_t next_change,
time_t now,
int warn_pwd_expire,
BOOL *already_expired)
{
int days = 0;
struct tm tm_now, tm_next_change;
@ -579,7 +584,7 @@ static BOOL _pam_send_password_expiry_message(pam_handle_t *pamh, int ctrl, time
}
if ((next_change < 0) ||
(next_change > now + DAYS_TO_WARN_BEFORE_PWD_EXPIRES * SECONDS_PER_DAY)) {
(next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
return False;
}
@ -595,7 +600,7 @@ static BOOL _pam_send_password_expiry_message(pam_handle_t *pamh, int ctrl, time
return True;
}
if (days > 0 && days < DAYS_TO_WARN_BEFORE_PWD_EXPIRES) {
if (days > 0 && days < warn_pwd_expire) {
_make_remark_format(pamh, ctrl, PAM_TEXT_INFO, "Your password will expire in %d %s",
days, (days > 1) ? "days":"day");
return True;
@ -618,6 +623,7 @@ static BOOL _pam_send_password_expiry_message(pam_handle_t *pamh, int ctrl, time
static void _pam_warn_password_expiry(pam_handle_t *pamh,
int flags,
const struct winbindd_response *response,
int warn_pwd_expire,
BOOL *already_expired)
{
time_t now = time(NULL);
@ -640,7 +646,8 @@ static void _pam_warn_password_expiry(pam_handle_t *pamh,
/* check if the info3 must change timestamp has been set */
next_change = response->data.auth.info3.pass_must_change_time;
if (_pam_send_password_expiry_message(pamh, flags, next_change, now,
if (_pam_send_password_expiry_message(pamh, flags, next_change, now,
warn_pwd_expire,
already_expired)) {
return;
}
@ -655,7 +662,8 @@ static void _pam_warn_password_expiry(pam_handle_t *pamh,
next_change = response->data.auth.info3.pass_last_set_time +
response->data.auth.policy.expire;
if (_pam_send_password_expiry_message(pamh, flags, next_change, now,
if (_pam_send_password_expiry_message(pamh, flags, next_change, now,
warn_pwd_expire,
already_expired)) {
return;
}
@ -1029,6 +1037,7 @@ static int winbind_auth_request(pam_handle_t * pamh,
const char *pass,
const char *member,
const char *cctype,
const int warn_pwd_expire,
struct winbindd_response *p_response,
time_t *pwd_last_set,
char **user_ret)
@ -1134,7 +1143,9 @@ static int winbind_auth_request(pam_handle_t * pamh,
if (ret == PAM_SUCCESS) {
/* warn a user if the password is about to expire soon */
_pam_warn_password_expiry(pamh, ctrl, &response, &already_expired);
_pam_warn_password_expiry(pamh, ctrl, &response,
warn_pwd_expire,
&already_expired);
if (already_expired == True) {
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "Password has expired "
@ -1519,6 +1530,52 @@ out:
return parm_opt;
}
int get_config_item_int(const pam_handle_t *pamh,
int argc,
const char **argv,
int ctrl,
dictionary *d,
const char *item)
{
int parm_opt = -1, i = 0;
char *key = NULL;
/* let the pam opt take precedence over the pam_winbind.conf option */
for (i = 0; i < argc; i++) {
if ((strncmp(argv[i], item, strlen(item)) == 0)) {
char *p;
if ( (p = strchr( argv[i], '=' )) == NULL) {
_pam_log(pamh, ctrl, LOG_INFO,
"no \"=\" delimiter for \"%s\" found\n",
item);
goto out;
}
parm_opt = atoi(p + 1);
_pam_log_debug(pamh, ctrl, LOG_INFO,
"PAM config: %s '%d'\n",
item, parm_opt);
return parm_opt;
}
}
if (d != NULL) {
if (!asprintf(&key, "global:%s", item)) {
goto out;
}
parm_opt = iniparser_getint(d, key, -1);
SAFE_FREE(key);
_pam_log_debug(pamh, ctrl, LOG_INFO,
"CONFIG file: %s '%d'\n",
item, parm_opt);
}
out:
return parm_opt;
}
const char *get_krb5_cc_type_from_config(const pam_handle_t *pamh, int argc, const char **argv, int ctrl, dictionary *d)
{
return get_conf_item_string(pamh, argc, argv, ctrl, d, "krb5_ccache_type", WINBIND_KRB5_CCACHE_TYPE);
@ -1534,6 +1591,22 @@ const char *get_member_from_config(const pam_handle_t *pamh, int argc, const cha
return get_conf_item_string(pamh, argc, argv, ctrl, d, "require-membership-of", WINBIND_REQUIRED_MEMBERSHIP);
}
int get_warn_pwd_expire_from_config(const pam_handle_t *pamh,
int argc,
const char **argv,
int ctrl,
dictionary *d)
{
int ret;
ret = get_config_item_int(pamh, argc, argv, ctrl, d,
"warn_pwd_expire");
/* no or broken setting */
if (ret <= 0) {
return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
}
return ret;
}
PAM_EXTERN
int pam_sm_authenticate(pam_handle_t *pamh, int flags,
int argc, const char **argv)
@ -1542,6 +1615,7 @@ int pam_sm_authenticate(pam_handle_t *pamh, int flags,
const char *password;
const char *member = NULL;
const char *cctype = NULL;
int warn_pwd_expire;
int retval = PAM_AUTH_ERR;
dictionary *d = NULL;
char *username_ret = NULL;
@ -1612,9 +1686,13 @@ int pam_sm_authenticate(pam_handle_t *pamh, int flags,
cctype = get_krb5_cc_type_from_config(pamh, argc, argv, ctrl, d);
warn_pwd_expire = get_warn_pwd_expire_from_config(pamh, argc, argv,
ctrl, d);
/* Now use the username to look up password */
retval = winbind_auth_request(pamh, ctrl, username, password, member,
cctype, NULL, NULL, &username_ret);
cctype, warn_pwd_expire, NULL, NULL,
&username_ret);
if (retval == PAM_NEW_AUTHTOK_REQD ||
retval == PAM_AUTHTOK_EXPIRED) {
@ -2064,7 +2142,8 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
/* verify that this is the password for this user */
ret = winbind_auth_request(pamh, ctrl, user, pass_old,
NULL, NULL, &response, &pwdlastset_prelim, NULL);
NULL, NULL, 0, &response,
&pwdlastset_prelim, NULL);
if (ret != PAM_ACCT_EXPIRED &&
ret != PAM_AUTHTOK_EXPIRED &&
@ -2156,9 +2235,13 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
const char *member = get_member_from_config(pamh, argc, argv, ctrl, d);
const char *cctype = get_krb5_cc_type_from_config(pamh, argc, argv, ctrl, d);
const int warn_pwd_expire =
get_warn_pwd_expire_from_config(pamh, argc, argv, ctrl,
d);
ret = winbind_auth_request(pamh, ctrl, user, pass_new,
member, cctype, &response, NULL, &username_ret);
member, cctype, 0, &response,
NULL, &username_ret);
_pam_overwrite(pass_new);
_pam_overwrite(pass_old);
pass_old = pass_new = NULL;
@ -2166,7 +2249,8 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
if (ret == PAM_SUCCESS) {
/* warn a user if the password is about to expire soon */
_pam_warn_password_expiry(pamh, ctrl, &response, NULL);
_pam_warn_password_expiry(pamh, ctrl, &response,
warn_pwd_expire , NULL);
/* set some info3 info for other modules in the stack */
_pam_set_data_info3(pamh, ctrl, &response);

2
source/nsswitch/pam_winbind.h
View File

@ -116,7 +116,7 @@ do { \
#define SECONDS_PER_DAY 86400
#define DAYS_TO_WARN_BEFORE_PWD_EXPIRES 5
#define DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES 14
#include "winbind_client.h"