mirror of
https://github.com/samba-team/samba.git
synced 2024-12-23 17:34:34 +03:00
d52612a7d9
(This used to be commit 8c60e71229
)
1494 lines
41 KiB
C
1494 lines
41 KiB
C
/* pam_winbind module
|
|
|
|
Copyright Andrew Tridgell <tridge@samba.org> 2000
|
|
Copyright Tim Potter <tpot@samba.org> 2000
|
|
Copyright Andrew Bartlett <abartlet@samba.org> 2002
|
|
Copyright Guenther Deschner <gd@samba.org> 2005-2006
|
|
|
|
largely based on pam_userdb by Cristian Gafton <gafton@redhat.com>
|
|
also contains large slabs of code from pam_unix by Elliot Lee <sopwith@redhat.com>
|
|
(see copyright below for full details)
|
|
*/
|
|
|
|
#include "pam_winbind.h"
|
|
|
|
/* data tokens */
|
|
|
|
#define MAX_PASSWD_TRIES 3
|
|
|
|
/*
|
|
* Work around the pam API that has functions with void ** as parameters.
|
|
* These lead to strict aliasing warnings with gcc.
|
|
*/
|
|
static int _pam_get_item(const pam_handle_t *pamh, int item_type,
|
|
const void *_item)
|
|
{
|
|
const void **item = (const void **)_item;
|
|
return pam_get_item(pamh, item_type, item);
|
|
}
|
|
static int _pam_get_data(const pam_handle_t *pamh,
|
|
const char *module_data_name, const void *_data)
|
|
{
|
|
const void **data = (const void **)_data;
|
|
return pam_get_data(pamh, module_data_name, data);
|
|
}
|
|
|
|
/* some syslogging */
|
|
|
|
static void _pam_log_int(const pam_handle_t *pamh, int err, const char *format, va_list args)
|
|
{
|
|
|
|
#ifdef HAVE_PAM_VSYSLOG
|
|
pam_vsyslog(pamh, err, format, args);
|
|
#else
|
|
{
|
|
|
|
char *format2 = NULL;
|
|
const char *service;
|
|
|
|
_pam_get_item(pamh, PAM_SERVICE, &service);
|
|
|
|
format2 = malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
|
|
if (format2 == NULL) {
|
|
/* what else todo ? */
|
|
vsyslog(err, format, args);
|
|
return;
|
|
}
|
|
|
|
sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
|
|
vsyslog(err, format2, args);
|
|
SAFE_FREE(format2);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void _pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
|
|
{
|
|
va_list args;
|
|
|
|
if (ctrl & WINBIND_SILENT) {
|
|
return;
|
|
}
|
|
|
|
va_start(args, format);
|
|
_pam_log_int(pamh, err, format, args);
|
|
va_end(args);
|
|
}
|
|
|
|
static void _pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
|
|
{
|
|
va_list args;
|
|
|
|
if (ctrl & WINBIND_SILENT) {
|
|
return;
|
|
}
|
|
|
|
if (!(ctrl & WINBIND_DEBUG_ARG)) {
|
|
return;
|
|
}
|
|
|
|
va_start(args, format);
|
|
_pam_log_int(pamh, err, format, args);
|
|
va_end(args);
|
|
}
|
|
|
|
static int _pam_parse(const pam_handle_t *pamh, int flags, int argc, const char **argv, dictionary **d)
|
|
{
|
|
int ctrl = 0;
|
|
const char *config_file = NULL;
|
|
int i;
|
|
const char **v;
|
|
|
|
if (flags & PAM_SILENT) {
|
|
ctrl |= WINBIND_SILENT;
|
|
}
|
|
|
|
if (d == NULL) {
|
|
goto config_from_pam;
|
|
}
|
|
|
|
for (i=argc,v=argv; i-- > 0; ++v) {
|
|
if (!strncasecmp(*v, "config", strlen("config"))) {
|
|
ctrl |= WINBIND_CONFIG_FILE;
|
|
config_file = v[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (config_file == NULL) {
|
|
config_file = PAM_WINBIND_CONFIG_FILE;
|
|
}
|
|
|
|
*d = iniparser_load(CONST_DISCARD(char *, config_file));
|
|
if (*d == NULL) {
|
|
goto config_from_pam;
|
|
}
|
|
|
|
if (iniparser_getboolean(*d, CONST_DISCARD(char *, "global:debug"), False)) {
|
|
ctrl |= WINBIND_DEBUG_ARG;
|
|
}
|
|
|
|
if (iniparser_getboolean(*d, CONST_DISCARD(char *, "global:cached_login"), False)) {
|
|
ctrl |= WINBIND_CACHED_LOGIN;
|
|
}
|
|
|
|
if (iniparser_getboolean(*d, CONST_DISCARD(char *, "global:krb5_auth"), False)) {
|
|
ctrl |= WINBIND_KRB5_AUTH;
|
|
}
|
|
|
|
if (iniparser_getboolean(*d, CONST_DISCARD(char *, "global:silent"), False)) {
|
|
ctrl |= WINBIND_SILENT;
|
|
}
|
|
|
|
if (iniparser_getstr(*d, CONST_DISCARD(char *,"global:krb5_ccache_type")) != NULL) {
|
|
ctrl |= WINBIND_KRB5_CCACHE_TYPE;
|
|
}
|
|
|
|
if ((iniparser_getstr(*d, CONST_DISCARD(char *, "global:require-membership-of")) != NULL) ||
|
|
(iniparser_getstr(*d, CONST_DISCARD(char *, "global:require_membership_of")) != NULL)) {
|
|
ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
|
|
}
|
|
|
|
config_from_pam:
|
|
/* step through arguments */
|
|
for (i=argc,v=argv; i-- > 0; ++v) {
|
|
|
|
/* generic options */
|
|
if (!strcmp(*v,"debug"))
|
|
ctrl |= WINBIND_DEBUG_ARG;
|
|
else if (!strcasecmp(*v, "use_authtok"))
|
|
ctrl |= WINBIND_USE_AUTHTOK_ARG;
|
|
else if (!strcasecmp(*v, "use_first_pass"))
|
|
ctrl |= WINBIND_USE_FIRST_PASS_ARG;
|
|
else if (!strcasecmp(*v, "try_first_pass"))
|
|
ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
|
|
else if (!strcasecmp(*v, "unknown_ok"))
|
|
ctrl |= WINBIND_UNKNOWN_OK_ARG;
|
|
else if (!strncasecmp(*v, "require_membership_of", strlen("require_membership_of")))
|
|
ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
|
|
else if (!strncasecmp(*v, "require-membership-of", strlen("require-membership-of")))
|
|
ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
|
|
else if (!strcasecmp(*v, "krb5_auth"))
|
|
ctrl |= WINBIND_KRB5_AUTH;
|
|
else if (!strncasecmp(*v, "krb5_ccache_type", strlen("krb5_ccache_type")))
|
|
ctrl |= WINBIND_KRB5_CCACHE_TYPE;
|
|
else if (!strcasecmp(*v, "cached_login"))
|
|
ctrl |= WINBIND_CACHED_LOGIN;
|
|
else {
|
|
_pam_log(pamh, ctrl, LOG_ERR, "pam_parse: unknown option; %s", *v);
|
|
}
|
|
|
|
}
|
|
return ctrl;
|
|
};
|
|
|
|
static void _pam_winbind_cleanup_func(pam_handle_t *pamh, void *data, int error_status)
|
|
{
|
|
SAFE_FREE(data);
|
|
}
|
|
|
|
|
|
static const struct ntstatus_errors {
|
|
const char *ntstatus_string;
|
|
const char *error_string;
|
|
} ntstatus_errors[] = {
|
|
{"NT_STATUS_OK", "Success"},
|
|
{"NT_STATUS_BACKUP_CONTROLLER", "No primary Domain Controler available"},
|
|
{"NT_STATUS_PWD_TOO_SHORT", "Password too short"},
|
|
{"NT_STATUS_PWD_TOO_RECENT", "The password of this user is too recent to change"},
|
|
{"NT_STATUS_PWD_HISTORY_CONFLICT", "Password is already in password history"},
|
|
{"NT_STATUS_PASSWORD_EXPIRED", "Your password has expired"},
|
|
{"NT_STATUS_PASSWORD_MUST_CHANGE", "You need to change your password now"},
|
|
{"NT_STATUS_INVALID_WORKSTATION", "You are not allowed to logon from this workstation"},
|
|
{"NT_STATUS_INVALID_LOGON_HOURS", "You are not allowed to logon at this time"},
|
|
{"NT_STATUS_ACCOUNT_EXPIRED", "Your account has expired. Please contact your System administrator"}, /* SCNR */
|
|
{"NT_STATUS_ACCOUNT_DISABLED", "Your account is disabled. Please contact your System administrator"}, /* SCNR */
|
|
{"NT_STATUS_ACCOUNT_LOCKED_OUT", "Your account has been locked. Please contact your System administrator"}, /* SCNR */
|
|
{"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT", "Invalid Trust Account"},
|
|
{"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT", "Invalid Trust Account"},
|
|
{"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT", "Invalid Trust Account"},
|
|
{"NT_STATUS_ACCESS_DENIED", "Access is denied"},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
const char *_get_ntstatus_error_string(const char *nt_status_string)
|
|
{
|
|
int i;
|
|
for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
|
|
if (!strcasecmp(ntstatus_errors[i].ntstatus_string, nt_status_string)) {
|
|
return ntstatus_errors[i].error_string;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* --- authentication management functions --- */
|
|
|
|
/* Attempt a conversation */
|
|
|
|
static int converse(pam_handle_t *pamh, int nargs,
|
|
struct pam_message **message,
|
|
struct pam_response **response)
|
|
{
|
|
int retval;
|
|
struct pam_conv *conv;
|
|
|
|
retval = _pam_get_item(pamh, PAM_CONV, &conv );
|
|
if (retval == PAM_SUCCESS) {
|
|
retval = conv->conv(nargs, (const struct pam_message **)message,
|
|
response, conv->appdata_ptr);
|
|
}
|
|
|
|
return retval; /* propagate error status */
|
|
}
|
|
|
|
|
|
static int _make_remark(pam_handle_t * pamh, int type, const char *text)
|
|
{
|
|
int retval = PAM_SUCCESS;
|
|
|
|
struct pam_message *pmsg[1], msg[1];
|
|
struct pam_response *resp;
|
|
|
|
pmsg[0] = &msg[0];
|
|
msg[0].msg = CONST_DISCARD(char *, text);
|
|
msg[0].msg_style = type;
|
|
|
|
resp = NULL;
|
|
retval = converse(pamh, 1, pmsg, &resp);
|
|
|
|
if (resp) {
|
|
_pam_drop_reply(resp, 1);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static int _make_remark_format(pam_handle_t * pamh, int type, const char *format, ...)
|
|
{
|
|
va_list args;
|
|
char *var;
|
|
int ret;
|
|
|
|
va_start(args, format);
|
|
vasprintf(&var, format, args);
|
|
va_end(args);
|
|
|
|
ret = _make_remark(pamh, type, var);
|
|
SAFE_FREE(var);
|
|
return ret;
|
|
}
|
|
|
|
static int pam_winbind_request(pam_handle_t * pamh, int ctrl,
|
|
enum winbindd_cmd req_type,
|
|
struct winbindd_request *request,
|
|
struct winbindd_response *response)
|
|
{
|
|
/* Fill in request and send down pipe */
|
|
init_request(request, req_type);
|
|
|
|
if (write_sock(request, sizeof(*request), 0) == -1) {
|
|
_pam_log(pamh, ctrl, LOG_ERR, "pam_winbind_request: write to socket failed!");
|
|
close_sock();
|
|
return PAM_SERVICE_ERR;
|
|
}
|
|
|
|
/* Wait for reply */
|
|
if (read_reply(response) == -1) {
|
|
_pam_log(pamh, ctrl, LOG_ERR, "pam_winbind_request: read from socket failed!");
|
|
close_sock();
|
|
return PAM_SERVICE_ERR;
|
|
}
|
|
|
|
/* We are done with the socket - close it and avoid mischeif */
|
|
close_sock();
|
|
|
|
/* Copy reply data from socket */
|
|
if (response->result != WINBINDD_OK) {
|
|
if (response->data.auth.pam_error != PAM_SUCCESS) {
|
|
_pam_log(pamh, ctrl, LOG_ERR, "request failed: %s, PAM error was %s (%d), NT error was %s",
|
|
response->data.auth.error_string,
|
|
pam_strerror(pamh, response->data.auth.pam_error),
|
|
response->data.auth.pam_error,
|
|
response->data.auth.nt_status_string);
|
|
return response->data.auth.pam_error;
|
|
} else {
|
|
_pam_log(pamh, ctrl, LOG_ERR, "request failed, but PAM error 0!");
|
|
return PAM_SERVICE_ERR;
|
|
}
|
|
}
|
|
|
|
return PAM_SUCCESS;
|
|
}
|
|
|
|
static int pam_winbind_request_log(pam_handle_t * pamh,
|
|
int ctrl,
|
|
enum winbindd_cmd req_type,
|
|
struct winbindd_request *request,
|
|
struct winbindd_response *response,
|
|
const char *user)
|
|
{
|
|
int retval;
|
|
|
|
retval = pam_winbind_request(pamh, ctrl, req_type, request, response);
|
|
|
|
switch (retval) {
|
|
case PAM_AUTH_ERR:
|
|
/* incorrect password */
|
|
_pam_log(pamh, ctrl, LOG_WARNING, "user '%s' denied access (incorrect password or invalid membership)", user);
|
|
return retval;
|
|
case PAM_ACCT_EXPIRED:
|
|
/* account expired */
|
|
_pam_log(pamh, ctrl, LOG_WARNING, "user '%s' account expired", user);
|
|
return retval;
|
|
case PAM_AUTHTOK_EXPIRED:
|
|
/* password expired */
|
|
_pam_log(pamh, ctrl, LOG_WARNING, "user '%s' password expired", user);
|
|
return retval;
|
|
case PAM_NEW_AUTHTOK_REQD:
|
|
/* new password required */
|
|
_pam_log(pamh, ctrl, LOG_WARNING, "user '%s' new password required", user);
|
|
return retval;
|
|
case PAM_USER_UNKNOWN:
|
|
/* the user does not exist */
|
|
_pam_log_debug(pamh, ctrl, LOG_NOTICE, "user '%s' not found", user);
|
|
if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
|
|
return PAM_IGNORE;
|
|
}
|
|
return retval;
|
|
case PAM_SUCCESS:
|
|
if (req_type == WINBINDD_PAM_AUTH) {
|
|
/* Otherwise, the authentication looked good */
|
|
_pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' granted access", user);
|
|
} else if (req_type == WINBINDD_PAM_CHAUTHTOK) {
|
|
/* Otherwise, the authentication looked good */
|
|
_pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' password changed", user);
|
|
} else {
|
|
/* Otherwise, the authentication looked good */
|
|
_pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' OK", user);
|
|
}
|
|
|
|
return retval;
|
|
default:
|
|
/* we don't know anything about this return value */
|
|
_pam_log(pamh, ctrl, LOG_ERR, "internal module error (retval = %d, user = '%s')",
|
|
retval, user);
|
|
return retval;
|
|
}
|
|
}
|
|
|
|
/* talk to winbindd */
|
|
static int winbind_auth_request(pam_handle_t * pamh,
|
|
int ctrl,
|
|
const char *user,
|
|
const char *pass,
|
|
const char *member,
|
|
const char *cctype,
|
|
int process_result,
|
|
time_t *pwd_last_set,
|
|
char **user_ret)
|
|
{
|
|
struct winbindd_request request;
|
|
struct winbindd_response response;
|
|
int ret;
|
|
|
|
ZERO_STRUCT(request);
|
|
ZERO_STRUCT(response);
|
|
|
|
if (pwd_last_set) {
|
|
*pwd_last_set = 0;
|
|
}
|
|
|
|
strncpy(request.data.auth.user, user,
|
|
sizeof(request.data.auth.user)-1);
|
|
|
|
strncpy(request.data.auth.pass, pass,
|
|
sizeof(request.data.auth.pass)-1);
|
|
|
|
request.data.auth.krb5_cc_type[0] = '\0';
|
|
request.data.auth.uid = -1;
|
|
|
|
request.flags = WBFLAG_PAM_INFO3_TEXT | WBFLAG_PAM_CONTACT_TRUSTDOM;
|
|
|
|
if (ctrl & WINBIND_KRB5_AUTH) {
|
|
|
|
struct passwd *pwd = NULL;
|
|
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "enabling krb5 login flag\n");
|
|
|
|
request.flags |= WBFLAG_PAM_KRB5 | WBFLAG_PAM_FALLBACK_AFTER_KRB5;
|
|
|
|
pwd = getpwnam(user);
|
|
if (pwd == NULL) {
|
|
return PAM_USER_UNKNOWN;
|
|
}
|
|
request.data.auth.uid = pwd->pw_uid;
|
|
}
|
|
|
|
if (ctrl & WINBIND_CACHED_LOGIN) {
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "enabling cached login flag\n");
|
|
request.flags |= WBFLAG_PAM_CACHED_LOGIN;
|
|
}
|
|
|
|
if (user_ret) {
|
|
*user_ret = NULL;
|
|
request.flags |= WBFLAG_PAM_UNIX_NAME;
|
|
}
|
|
|
|
if (cctype != NULL) {
|
|
strncpy(request.data.auth.krb5_cc_type, cctype,
|
|
sizeof(request.data.auth.krb5_cc_type) - 1);
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "enabling request for a %s krb5 ccache\n", cctype);
|
|
}
|
|
|
|
request.data.auth.require_membership_of_sid[0] = '\0';
|
|
|
|
if (member != NULL) {
|
|
strncpy(request.data.auth.require_membership_of_sid, member,
|
|
sizeof(request.data.auth.require_membership_of_sid)-1);
|
|
}
|
|
|
|
/* lookup name? */
|
|
if ( (member != NULL) && (strncmp("S-", member, 2) != 0) ) {
|
|
|
|
struct winbindd_request sid_request;
|
|
struct winbindd_response sid_response;
|
|
|
|
ZERO_STRUCT(sid_request);
|
|
ZERO_STRUCT(sid_response);
|
|
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "no sid given, looking up: %s\n", member);
|
|
|
|
/* fortunatly winbindd can handle non-separated names */
|
|
strncpy(sid_request.data.name.name, member,
|
|
sizeof(sid_request.data.name.name) - 1);
|
|
|
|
if (pam_winbind_request_log(pamh, ctrl, WINBINDD_LOOKUPNAME, &sid_request, &sid_response, user)) {
|
|
_pam_log(pamh, ctrl, LOG_INFO, "could not lookup name: %s\n", member);
|
|
return PAM_AUTH_ERR;
|
|
}
|
|
|
|
member = sid_response.data.sid.sid;
|
|
|
|
strncpy(request.data.auth.require_membership_of_sid, member,
|
|
sizeof(request.data.auth.require_membership_of_sid)-1);
|
|
}
|
|
|
|
ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_AUTH, &request, &response, user);
|
|
|
|
if (pwd_last_set) {
|
|
*pwd_last_set = response.data.auth.info3.pass_last_set_time;
|
|
}
|
|
|
|
if ((ctrl & WINBIND_KRB5_AUTH) &&
|
|
response.data.auth.krb5ccname[0] != '\0') {
|
|
|
|
char var[PATH_MAX];
|
|
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "request returned KRB5CCNAME: %s",
|
|
response.data.auth.krb5ccname);
|
|
|
|
snprintf(var, sizeof(var), "KRB5CCNAME=%s", response.data.auth.krb5ccname);
|
|
|
|
ret = pam_putenv(pamh, var);
|
|
if (ret != PAM_SUCCESS) {
|
|
_pam_log(pamh, ctrl, LOG_ERR, "failed to set KRB5CCNAME to %s", var);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (!process_result) {
|
|
return ret;
|
|
}
|
|
|
|
if (ret) {
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_PASSWORD_EXPIRED");
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_PASSWORD_MUST_CHANGE");
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_INVALID_WORKSTATION");
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_INVALID_LOGON_HOURS");
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_ACCOUNT_EXPIRED");
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_ACCOUNT_DISABLED");
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_ACCOUNT_LOCKED_OUT");
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT");
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT");
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT");
|
|
}
|
|
|
|
/* handle the case where the auth was ok, but the password must expire right now */
|
|
/* good catch from Ralf Haferkamp: an expiry of "never" is translated to -1 */
|
|
if ( ! (response.data.auth.info3.acct_flags & ACB_PWNOEXP) &&
|
|
(response.data.auth.policy.expire > 0) &&
|
|
(response.data.auth.info3.pass_last_set_time + response.data.auth.policy.expire < time(NULL))) {
|
|
|
|
ret = PAM_AUTHTOK_EXPIRED;
|
|
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG,"Password has expired (Password was last set: %d, "
|
|
"the policy says it should expire here %d (now it's: %d)\n",
|
|
response.data.auth.info3.pass_last_set_time,
|
|
response.data.auth.info3.pass_last_set_time + response.data.auth.policy.expire,
|
|
time(NULL));
|
|
|
|
PAM_WB_REMARK_DIRECT_RET(pamh, "NT_STATUS_PASSWORD_EXPIRED");
|
|
|
|
}
|
|
|
|
/* warn a user if the password is about to expire soon */
|
|
if ( ! (response.data.auth.info3.acct_flags & ACB_PWNOEXP) &&
|
|
(response.data.auth.policy.expire) &&
|
|
(response.data.auth.info3.pass_last_set_time + response.data.auth.policy.expire > time(NULL) ) ) {
|
|
|
|
int days = response.data.auth.policy.expire / SECONDS_PER_DAY;
|
|
if (days <= DAYS_TO_WARN_BEFORE_PWD_EXPIRES) {
|
|
_make_remark_format(pamh, PAM_TEXT_INFO, "Your password will expire in %d days", days);
|
|
}
|
|
}
|
|
|
|
if (response.data.auth.info3.user_flgs & LOGON_CACHED_ACCOUNT) {
|
|
_make_remark(pamh, PAM_ERROR_MSG, "Logging on using cached account. Network ressources can be unavailable");
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG,"User %s logged on using cached account\n", user);
|
|
}
|
|
|
|
/* save the CIFS homedir for pam_cifs / pam_mount */
|
|
if (response.data.auth.info3.home_dir[0] != '\0') {
|
|
|
|
int ret2 = pam_set_data(pamh, PAM_WINBIND_HOMEDIR,
|
|
(void *) strdup(response.data.auth.info3.home_dir),
|
|
_pam_winbind_cleanup_func);
|
|
if (ret2) {
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "Could not set data: %s",
|
|
pam_strerror(pamh, ret2));
|
|
}
|
|
|
|
}
|
|
|
|
/* save the logon script path for other PAM modules */
|
|
if (response.data.auth.info3.logon_script[0] != '\0') {
|
|
|
|
int ret2 = pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT,
|
|
(void *) strdup(response.data.auth.info3.logon_script),
|
|
_pam_winbind_cleanup_func);
|
|
if (ret2) {
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "Could not set data: %s",
|
|
pam_strerror(pamh, ret2));
|
|
}
|
|
}
|
|
|
|
/* If winbindd returned a username, return the pointer to it here. */
|
|
if (user_ret && response.extra_data.data) {
|
|
/* We have to trust it's a null terminated string. */
|
|
*user_ret = (char *)response.extra_data.data;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* talk to winbindd */
|
|
static int winbind_chauthtok_request(pam_handle_t * pamh,
|
|
int ctrl,
|
|
const char *user,
|
|
const char *oldpass,
|
|
const char *newpass,
|
|
time_t pwd_last_set)
|
|
{
|
|
struct winbindd_request request;
|
|
struct winbindd_response response;
|
|
int ret;
|
|
|
|
ZERO_STRUCT(request);
|
|
ZERO_STRUCT(response);
|
|
|
|
if (request.data.chauthtok.user == NULL) return -2;
|
|
|
|
strncpy(request.data.chauthtok.user, user,
|
|
sizeof(request.data.chauthtok.user) - 1);
|
|
|
|
if (oldpass != NULL) {
|
|
strncpy(request.data.chauthtok.oldpass, oldpass,
|
|
sizeof(request.data.chauthtok.oldpass) - 1);
|
|
} else {
|
|
request.data.chauthtok.oldpass[0] = '\0';
|
|
}
|
|
|
|
if (newpass != NULL) {
|
|
strncpy(request.data.chauthtok.newpass, newpass,
|
|
sizeof(request.data.chauthtok.newpass) - 1);
|
|
} else {
|
|
request.data.chauthtok.newpass[0] = '\0';
|
|
}
|
|
|
|
if (ctrl & WINBIND_KRB5_AUTH) {
|
|
request.flags = WBFLAG_PAM_KRB5 | WBFLAG_PAM_CONTACT_TRUSTDOM;
|
|
}
|
|
|
|
ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_CHAUTHTOK, &request, &response, user);
|
|
|
|
if (ret == PAM_SUCCESS) {
|
|
return ret;
|
|
}
|
|
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_BACKUP_CONTROLLER");
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_ACCESS_DENIED");
|
|
|
|
/* TODO: tell the min pwd length ? */
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_PWD_TOO_SHORT");
|
|
|
|
/* TODO: tell the minage ? */
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_PWD_TOO_RECENT");
|
|
|
|
/* TODO: tell the history length ? */
|
|
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, response, "NT_STATUS_PWD_HISTORY_CONFLICT");
|
|
|
|
if (!strcasecmp(response.data.auth.nt_status_string, "NT_STATUS_PASSWORD_RESTRICTION")) {
|
|
|
|
/* FIXME: avoid to send multiple PAM messages after another */
|
|
switch (response.data.auth.reject_reason) {
|
|
case -1:
|
|
break;
|
|
case REJECT_REASON_OTHER:
|
|
if ((response.data.auth.policy.min_passwordage > 0) &&
|
|
(pwd_last_set + response.data.auth.policy.min_passwordage > time(NULL))) {
|
|
PAM_WB_REMARK_DIRECT(pamh, "NT_STATUS_PWD_TOO_RECENT");
|
|
}
|
|
break;
|
|
case REJECT_REASON_TOO_SHORT:
|
|
PAM_WB_REMARK_DIRECT(pamh, "NT_STATUS_PWD_TOO_SHORT");
|
|
break;
|
|
case REJECT_REASON_IN_HISTORY:
|
|
PAM_WB_REMARK_DIRECT(pamh, "NT_STATUS_PWD_HISTORY_CONFLICT");
|
|
break;
|
|
case REJECT_REASON_NOT_COMPLEX:
|
|
_make_remark(pamh, PAM_ERROR_MSG, "Password does not meet complexity requirements");
|
|
break;
|
|
default:
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG,
|
|
"unknown password change reject reason: %d",
|
|
response.data.auth.reject_reason);
|
|
break;
|
|
}
|
|
|
|
_make_remark_format(pamh, PAM_ERROR_MSG,
|
|
"Your password must be at least %d characters; "
|
|
"cannot repeat any of the your previous %d passwords"
|
|
"%s. "
|
|
"Please type a different password. "
|
|
"Type a password which meets these requirements in both text boxes.",
|
|
response.data.auth.policy.min_length_password,
|
|
response.data.auth.policy.password_history,
|
|
(response.data.auth.policy.password_properties & DOMAIN_PASSWORD_COMPLEX) ?
|
|
"; must contain capitals, numerals or punctuation; and cannot contain your account or full name" :
|
|
"");
|
|
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Checks if a user has an account
|
|
*
|
|
* return values:
|
|
* 1 = User not found
|
|
* 0 = OK
|
|
* -1 = System error
|
|
*/
|
|
static int valid_user(pam_handle_t *pamh, int ctrl, const char *user)
|
|
{
|
|
/* check not only if the user is available over NSS calls, also make
|
|
* sure it's really a winbind user, this is important when stacking PAM
|
|
* modules in the 'account' or 'password' facility. */
|
|
|
|
struct passwd *pwd = NULL;
|
|
struct winbindd_request request;
|
|
struct winbindd_response response;
|
|
int ret;
|
|
|
|
ZERO_STRUCT(request);
|
|
ZERO_STRUCT(response);
|
|
|
|
pwd = getpwnam(user);
|
|
if (pwd == NULL) {
|
|
return 1;
|
|
}
|
|
|
|
strncpy(request.data.username, user,
|
|
sizeof(request.data.username) - 1);
|
|
|
|
ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_GETPWNAM, &request, &response, user);
|
|
|
|
switch (ret) {
|
|
case PAM_USER_UNKNOWN:
|
|
return 1;
|
|
case PAM_SUCCESS:
|
|
return 0;
|
|
default:
|
|
break;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static char *_pam_delete(register char *xx)
|
|
{
|
|
_pam_overwrite(xx);
|
|
_pam_drop(xx);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* obtain a password from the user
|
|
*/
|
|
|
|
static int _winbind_read_password(pam_handle_t * pamh,
|
|
unsigned int ctrl,
|
|
const char *comment,
|
|
const char *prompt1,
|
|
const char *prompt2,
|
|
const char **pass)
|
|
{
|
|
int authtok_flag;
|
|
int retval;
|
|
const char *item;
|
|
char *token;
|
|
|
|
/*
|
|
* make sure nothing inappropriate gets returned
|
|
*/
|
|
|
|
*pass = token = NULL;
|
|
|
|
/*
|
|
* which authentication token are we getting?
|
|
*/
|
|
|
|
authtok_flag = on(WINBIND__OLD_PASSWORD, ctrl) ? PAM_OLDAUTHTOK : PAM_AUTHTOK;
|
|
|
|
/*
|
|
* should we obtain the password from a PAM item ?
|
|
*/
|
|
|
|
if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) || on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
|
|
retval = _pam_get_item(pamh, authtok_flag, &item);
|
|
if (retval != PAM_SUCCESS) {
|
|
/* very strange. */
|
|
_pam_log(pamh, ctrl, LOG_ALERT,
|
|
"pam_get_item returned error to unix-read-password"
|
|
);
|
|
return retval;
|
|
} else if (item != NULL) { /* we have a password! */
|
|
*pass = item;
|
|
item = NULL;
|
|
return PAM_SUCCESS;
|
|
} else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
|
|
return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
|
|
} else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
|
|
&& off(WINBIND__OLD_PASSWORD, ctrl)) {
|
|
return PAM_AUTHTOK_RECOVER_ERR;
|
|
}
|
|
}
|
|
/*
|
|
* getting here implies we will have to get the password from the
|
|
* user directly.
|
|
*/
|
|
|
|
{
|
|
struct pam_message msg[3], *pmsg[3];
|
|
struct pam_response *resp;
|
|
int i, replies;
|
|
|
|
/* prepare to converse */
|
|
|
|
if (comment != NULL) {
|
|
pmsg[0] = &msg[0];
|
|
msg[0].msg_style = PAM_TEXT_INFO;
|
|
msg[0].msg = CONST_DISCARD(char *, comment);
|
|
i = 1;
|
|
} else {
|
|
i = 0;
|
|
}
|
|
|
|
pmsg[i] = &msg[i];
|
|
msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
|
|
msg[i++].msg = CONST_DISCARD(char *, prompt1);
|
|
replies = 1;
|
|
|
|
if (prompt2 != NULL) {
|
|
pmsg[i] = &msg[i];
|
|
msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
|
|
msg[i++].msg = CONST_DISCARD(char *, prompt2);
|
|
++replies;
|
|
}
|
|
/* so call the conversation expecting i responses */
|
|
resp = NULL;
|
|
retval = converse(pamh, i, pmsg, &resp);
|
|
|
|
if (resp != NULL) {
|
|
|
|
/* interpret the response */
|
|
|
|
if (retval == PAM_SUCCESS) { /* a good conversation */
|
|
|
|
token = x_strdup(resp[i - replies].resp);
|
|
if (token != NULL) {
|
|
if (replies == 2) {
|
|
/* verify that password entered correctly */
|
|
if (!resp[i - 1].resp
|
|
|| strcmp(token, resp[i - 1].resp)) {
|
|
_pam_delete(token); /* mistyped */
|
|
retval = PAM_AUTHTOK_RECOVER_ERR;
|
|
_make_remark(pamh, PAM_ERROR_MSG, MISTYPED_PASS);
|
|
}
|
|
}
|
|
} else {
|
|
_pam_log(pamh, ctrl, LOG_NOTICE, "could not recover authentication token");
|
|
retval = PAM_AUTHTOK_RECOVER_ERR;
|
|
}
|
|
|
|
}
|
|
/*
|
|
* tidy up the conversation (resp_retcode) is ignored
|
|
* -- what is it for anyway? AGM
|
|
*/
|
|
|
|
_pam_drop_reply(resp, i);
|
|
|
|
} else {
|
|
retval = (retval == PAM_SUCCESS)
|
|
? PAM_AUTHTOK_RECOVER_ERR : retval;
|
|
}
|
|
}
|
|
|
|
if (retval != PAM_SUCCESS) {
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG,
|
|
"unable to obtain a password");
|
|
return retval;
|
|
}
|
|
/* 'token' is the entered password */
|
|
|
|
/* we store this password as an item */
|
|
|
|
retval = pam_set_item(pamh, authtok_flag, token);
|
|
_pam_delete(token); /* clean it up */
|
|
if (retval != PAM_SUCCESS ||
|
|
(retval = _pam_get_item(pamh, authtok_flag, &item)) != PAM_SUCCESS) {
|
|
|
|
_pam_log(pamh, ctrl, LOG_CRIT, "error manipulating password");
|
|
return retval;
|
|
|
|
}
|
|
|
|
*pass = item;
|
|
item = NULL; /* break link to password */
|
|
|
|
return PAM_SUCCESS;
|
|
}
|
|
|
|
const char *get_conf_item_string(const pam_handle_t *pamh,
|
|
int argc,
|
|
const char **argv,
|
|
int ctrl,
|
|
dictionary *d,
|
|
const char *item,
|
|
int config_flag)
|
|
{
|
|
int i = 0;
|
|
char *parm = NULL;
|
|
const char *parm_opt = NULL;
|
|
char *key = NULL;
|
|
|
|
if (!(ctrl & config_flag)) {
|
|
goto out;
|
|
}
|
|
|
|
/* let the pam opt take precedence over the pam_winbind.conf option */
|
|
|
|
if (d != NULL) {
|
|
|
|
if (!asprintf(&key, "global:%s", item)) {
|
|
goto out;
|
|
}
|
|
|
|
parm_opt = iniparser_getstr(d, key);
|
|
SAFE_FREE(key);
|
|
}
|
|
|
|
for ( i=0; i<argc; i++ ) {
|
|
|
|
if ((strncmp(argv[i], item, strlen(item)) == 0)) {
|
|
char *p;
|
|
|
|
parm = strdup(argv[i]);
|
|
|
|
if ( (p = strchr( parm, '=' )) == NULL) {
|
|
_pam_log(pamh, ctrl, LOG_INFO, "no \"=\" delimiter for \"%s\" found\n", item);
|
|
goto out;
|
|
}
|
|
SAFE_FREE(parm);
|
|
_pam_log_debug(pamh, ctrl, LOG_INFO, "PAM config: %s '%s'\n", item, p+1);
|
|
return p + 1;
|
|
}
|
|
}
|
|
|
|
if (d != NULL) {
|
|
_pam_log_debug(pamh, ctrl, LOG_INFO, "CONFIG file: %s '%s'\n", item, parm_opt);
|
|
}
|
|
out:
|
|
SAFE_FREE(parm);
|
|
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);
|
|
}
|
|
|
|
const char *get_member_from_config(const pam_handle_t *pamh, int argc, const char **argv, int ctrl, dictionary *d)
|
|
{
|
|
const char *ret = NULL;
|
|
ret = get_conf_item_string(pamh, argc, argv, ctrl, d, "require_membership_of", WINBIND_REQUIRED_MEMBERSHIP);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
return get_conf_item_string(pamh, argc, argv, ctrl, d, "require-membership-of", WINBIND_REQUIRED_MEMBERSHIP);
|
|
}
|
|
|
|
PAM_EXTERN
|
|
int pam_sm_authenticate(pam_handle_t *pamh, int flags,
|
|
int argc, const char **argv)
|
|
{
|
|
const char *username;
|
|
const char *password;
|
|
const char *member = NULL;
|
|
const char *cctype = NULL;
|
|
int retval = PAM_AUTH_ERR;
|
|
dictionary *d;
|
|
char *username_ret = NULL;
|
|
|
|
/* parse arguments */
|
|
int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
|
|
if (ctrl == -1) {
|
|
retval = PAM_SYSTEM_ERR;
|
|
goto out;
|
|
}
|
|
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "pam_winbind: pam_sm_authenticate (flags: 0x%04x)", flags);
|
|
|
|
/* Get the username */
|
|
retval = pam_get_user(pamh, &username, NULL);
|
|
if ((retval != PAM_SUCCESS) || (!username)) {
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "can not get the username");
|
|
retval = PAM_SERVICE_ERR;
|
|
goto out;
|
|
}
|
|
|
|
retval = _winbind_read_password(pamh, ctrl, NULL,
|
|
"Password: ", NULL,
|
|
&password);
|
|
|
|
if (retval != PAM_SUCCESS) {
|
|
_pam_log(pamh, ctrl, LOG_ERR, "Could not retrieve user's password");
|
|
retval = PAM_AUTHTOK_ERR;
|
|
goto out;
|
|
}
|
|
|
|
/* Let's not give too much away in the log file */
|
|
|
|
#ifdef DEBUG_PASSWORD
|
|
_pam_log_debug(pamh, ctrl, LOG_INFO, "Verify user '%s' with password '%s'",
|
|
username, password);
|
|
#else
|
|
_pam_log_debug(pamh, ctrl, LOG_INFO, "Verify user '%s'", username);
|
|
#endif
|
|
|
|
member = get_member_from_config(pamh, argc, argv, ctrl, d);
|
|
|
|
cctype = get_krb5_cc_type_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, True, NULL, &username_ret);
|
|
|
|
if (retval == PAM_NEW_AUTHTOK_REQD ||
|
|
retval == PAM_AUTHTOK_EXPIRED) {
|
|
|
|
char *buf;
|
|
|
|
if (!asprintf(&buf, "%d", retval)) {
|
|
retval = PAM_BUF_ERR;
|
|
goto out;
|
|
}
|
|
|
|
pam_set_data( pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, (void *)buf, _pam_winbind_cleanup_func);
|
|
|
|
retval = PAM_SUCCESS;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
if (username_ret) {
|
|
pam_set_item (pamh, PAM_USER, username_ret);
|
|
_pam_log_debug(pamh, ctrl, LOG_INFO, "Returned user was '%s'", username_ret);
|
|
free(username_ret);
|
|
}
|
|
|
|
if (d) {
|
|
iniparser_freedict(d);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
PAM_EXTERN
|
|
int pam_sm_setcred(pam_handle_t *pamh, int flags,
|
|
int argc, const char **argv)
|
|
{
|
|
/* parse arguments */
|
|
int ctrl = _pam_parse(pamh, flags, argc, argv, NULL);
|
|
if (ctrl == -1) {
|
|
return PAM_SYSTEM_ERR;
|
|
}
|
|
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "pam_winbind: pam_sm_setcred (flags: 0x%04x)", flags);
|
|
|
|
if (flags & PAM_DELETE_CRED) {
|
|
return pam_sm_close_session(pamh, flags, argc, argv);
|
|
}
|
|
|
|
return PAM_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* Account management. We want to verify that the account exists
|
|
* before returning PAM_SUCCESS
|
|
*/
|
|
PAM_EXTERN
|
|
int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
|
|
int argc, const char **argv)
|
|
{
|
|
const char *username;
|
|
int retval = PAM_USER_UNKNOWN;
|
|
void *tmp = NULL;
|
|
|
|
/* parse arguments */
|
|
int ctrl = _pam_parse(pamh, flags, argc, argv, NULL);
|
|
if (ctrl == -1) {
|
|
return PAM_SYSTEM_ERR;
|
|
}
|
|
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "pam_winbind: pam_sm_acct_mgmt (flags: 0x%04x)", flags);
|
|
|
|
|
|
/* Get the username */
|
|
retval = pam_get_user(pamh, &username, NULL);
|
|
if ((retval != PAM_SUCCESS) || (!username)) {
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG,"can not get the username");
|
|
return PAM_SERVICE_ERR;
|
|
}
|
|
|
|
/* Verify the username */
|
|
retval = valid_user(pamh, ctrl, username);
|
|
switch (retval) {
|
|
case -1:
|
|
/* some sort of system error. The log was already printed */
|
|
return PAM_SERVICE_ERR;
|
|
case 1:
|
|
/* the user does not exist */
|
|
_pam_log_debug(pamh, ctrl, LOG_NOTICE, "user '%s' not found", username);
|
|
if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
|
|
return PAM_IGNORE;
|
|
}
|
|
return PAM_USER_UNKNOWN;
|
|
case 0:
|
|
pam_get_data( pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, (const void **)&tmp);
|
|
if (tmp != NULL) {
|
|
retval = atoi((const char *)tmp);
|
|
switch (retval) {
|
|
case PAM_AUTHTOK_EXPIRED:
|
|
/* fall through, since new token is required in this case */
|
|
case PAM_NEW_AUTHTOK_REQD:
|
|
_pam_log(pamh, ctrl, LOG_WARNING, "pam_sm_acct_mgmt success but %s is set",
|
|
PAM_WINBIND_NEW_AUTHTOK_REQD);
|
|
_pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' needs new password", username);
|
|
/* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
|
|
return PAM_NEW_AUTHTOK_REQD;
|
|
default:
|
|
_pam_log(pamh, ctrl, LOG_WARNING, "pam_sm_acct_mgmt success");
|
|
_pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' granted access", username);
|
|
return PAM_SUCCESS;
|
|
}
|
|
}
|
|
|
|
/* Otherwise, the authentication looked good */
|
|
_pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' granted access", username);
|
|
return PAM_SUCCESS;
|
|
default:
|
|
/* we don't know anything about this return value */
|
|
_pam_log(pamh, ctrl, LOG_ERR, "internal module error (retval = %d, user = '%s')",
|
|
retval, username);
|
|
return PAM_SERVICE_ERR;
|
|
}
|
|
|
|
/* should not be reached */
|
|
return PAM_IGNORE;
|
|
}
|
|
|
|
PAM_EXTERN
|
|
int pam_sm_open_session(pam_handle_t *pamh, int flags,
|
|
int argc, const char **argv)
|
|
{
|
|
/* parse arguments */
|
|
int ctrl = _pam_parse(pamh, flags, argc, argv, NULL);
|
|
if (ctrl == -1) {
|
|
return PAM_SYSTEM_ERR;
|
|
}
|
|
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "pam_winbind: pam_sm_open_session handler (flags: 0x%04x)", flags);
|
|
|
|
return PAM_SUCCESS;
|
|
}
|
|
|
|
PAM_EXTERN
|
|
int pam_sm_close_session(pam_handle_t *pamh, int flags,
|
|
int argc, const char **argv)
|
|
{
|
|
dictionary *d;
|
|
int retval = PAM_SUCCESS;
|
|
|
|
/* parse arguments */
|
|
int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
|
|
if (ctrl == -1) {
|
|
retval = PAM_SYSTEM_ERR;
|
|
goto out;
|
|
}
|
|
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "pam_winbind: pam_sm_close_session handler (flags: 0x%04x)", flags);
|
|
|
|
if (!(flags & PAM_DELETE_CRED)) {
|
|
retval = PAM_SUCCESS;
|
|
goto out;
|
|
}
|
|
|
|
if (ctrl & WINBIND_KRB5_AUTH) {
|
|
|
|
/* destroy the ccache here */
|
|
struct winbindd_request request;
|
|
struct winbindd_response response;
|
|
const char *user;
|
|
const char *ccname = NULL;
|
|
struct passwd *pwd = NULL;
|
|
|
|
ZERO_STRUCT(request);
|
|
ZERO_STRUCT(response);
|
|
|
|
retval = pam_get_user(pamh, &user, "Username: ");
|
|
if (retval == PAM_SUCCESS) {
|
|
if (user == NULL) {
|
|
_pam_log(pamh, ctrl, LOG_ERR, "username was NULL!");
|
|
retval = PAM_USER_UNKNOWN;
|
|
goto out;
|
|
}
|
|
if (retval == PAM_SUCCESS) {
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "username [%s] obtained", user);
|
|
}
|
|
} else {
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "could not identify user");
|
|
goto out;
|
|
}
|
|
|
|
ccname = pam_getenv(pamh, "KRB5CCNAME");
|
|
if (ccname == NULL) {
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "user has no KRB5CCNAME environment");
|
|
}
|
|
|
|
strncpy(request.data.logoff.user, user,
|
|
sizeof(request.data.logoff.user) - 1);
|
|
|
|
if (ccname) {
|
|
strncpy(request.data.logoff.krb5ccname, ccname,
|
|
sizeof(request.data.logoff.krb5ccname) - 1);
|
|
}
|
|
|
|
pwd = getpwnam(user);
|
|
if (pwd == NULL) {
|
|
retval = PAM_USER_UNKNOWN;
|
|
goto out;
|
|
}
|
|
request.data.logoff.uid = pwd->pw_uid;
|
|
|
|
request.flags = WBFLAG_PAM_KRB5 | WBFLAG_PAM_CONTACT_TRUSTDOM;
|
|
|
|
retval = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_LOGOFF, &request, &response, user);
|
|
}
|
|
|
|
out:
|
|
if (d) {
|
|
iniparser_freedict(d);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
|
|
|
|
PAM_EXTERN
|
|
int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
|
|
int argc, const char **argv)
|
|
{
|
|
unsigned int lctrl;
|
|
int retval;
|
|
unsigned int ctrl;
|
|
|
|
/* <DO NOT free() THESE> */
|
|
const char *user;
|
|
char *pass_old, *pass_new;
|
|
/* </DO NOT free() THESE> */
|
|
|
|
char *Announce;
|
|
|
|
int retry = 0;
|
|
dictionary *d;
|
|
|
|
ctrl = _pam_parse(pamh, flags, argc, argv, &d);
|
|
if (ctrl == -1) {
|
|
retval = PAM_SYSTEM_ERR;
|
|
goto out;
|
|
}
|
|
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "pam_winbind: pam_sm_chauthtok (flags: 0x%04x)", flags);
|
|
|
|
/* clearing offline bit for the auth in the password change */
|
|
ctrl &= ~WINBIND_CACHED_LOGIN;
|
|
|
|
/*
|
|
* First get the name of a user
|
|
*/
|
|
retval = pam_get_user(pamh, &user, "Username: ");
|
|
if (retval == PAM_SUCCESS) {
|
|
if (user == NULL) {
|
|
_pam_log(pamh, ctrl, LOG_ERR, "username was NULL!");
|
|
retval = PAM_USER_UNKNOWN;
|
|
goto out;
|
|
}
|
|
if (retval == PAM_SUCCESS) {
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "username [%s] obtained",
|
|
user);
|
|
}
|
|
} else {
|
|
_pam_log_debug(pamh, ctrl, LOG_DEBUG,
|
|
"password - could not identify user");
|
|
goto out;
|
|
}
|
|
|
|
/* check if this is really a user in winbindd, not only in NSS */
|
|
retval = valid_user(pamh, ctrl, user);
|
|
switch (retval) {
|
|
case 1:
|
|
retval = PAM_USER_UNKNOWN;
|
|
goto out;
|
|
case -1:
|
|
retval = PAM_SYSTEM_ERR;
|
|
goto out;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* obtain and verify the current password (OLDAUTHTOK) for
|
|
* the user.
|
|
*/
|
|
|
|
if (flags & PAM_PRELIM_CHECK) {
|
|
|
|
time_t pwdlastset_prelim = 0;
|
|
|
|
/* instruct user what is happening */
|
|
#define greeting "Changing password for "
|
|
Announce = (char *) malloc(sizeof(greeting) + strlen(user));
|
|
if (Announce == NULL) {
|
|
_pam_log(pamh, ctrl, LOG_CRIT, "password - out of memory");
|
|
retval = PAM_BUF_ERR;
|
|
goto out;
|
|
}
|
|
(void) strcpy(Announce, greeting);
|
|
(void) strcpy(Announce + sizeof(greeting) - 1, user);
|
|
#undef greeting
|
|
|
|
lctrl = ctrl | WINBIND__OLD_PASSWORD;
|
|
retval = _winbind_read_password(pamh, lctrl,
|
|
Announce,
|
|
"(current) NT password: ",
|
|
NULL,
|
|
(const char **) &pass_old);
|
|
if (retval != PAM_SUCCESS) {
|
|
_pam_log(pamh, ctrl, LOG_NOTICE, "password - (old) token not obtained");
|
|
goto out;
|
|
}
|
|
/* verify that this is the password for this user */
|
|
|
|
retval = winbind_auth_request(pamh, ctrl, user, pass_old,
|
|
NULL, NULL, False, &pwdlastset_prelim, NULL);
|
|
|
|
if (retval != PAM_ACCT_EXPIRED &&
|
|
retval != PAM_AUTHTOK_EXPIRED &&
|
|
retval != PAM_NEW_AUTHTOK_REQD &&
|
|
retval != PAM_SUCCESS) {
|
|
pass_old = NULL;
|
|
goto out;
|
|
}
|
|
|
|
pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET, (void *)pwdlastset_prelim, _pam_winbind_cleanup_func);
|
|
|
|
retval = pam_set_item(pamh, PAM_OLDAUTHTOK, (const void *) pass_old);
|
|
pass_old = NULL;
|
|
if (retval != PAM_SUCCESS) {
|
|
_pam_log(pamh, ctrl, LOG_CRIT, "failed to set PAM_OLDAUTHTOK");
|
|
}
|
|
} else if (flags & PAM_UPDATE_AUTHTOK) {
|
|
|
|
time_t pwdlastset_update = 0;
|
|
|
|
/*
|
|
* obtain the proposed password
|
|
*/
|
|
|
|
/*
|
|
* get the old token back.
|
|
*/
|
|
|
|
retval = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
|
|
|
|
if (retval != PAM_SUCCESS) {
|
|
_pam_log(pamh, ctrl, LOG_NOTICE, "user not authenticated");
|
|
goto out;
|
|
}
|
|
|
|
lctrl = ctrl;
|
|
|
|
if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
|
|
lctrl |= WINBIND_USE_FIRST_PASS_ARG;
|
|
}
|
|
retry = 0;
|
|
retval = PAM_AUTHTOK_ERR;
|
|
while ((retval != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
|
|
/*
|
|
* use_authtok is to force the use of a previously entered
|
|
* password -- needed for pluggable password strength checking
|
|
*/
|
|
|
|
retval = _winbind_read_password(pamh, lctrl,
|
|
NULL,
|
|
"Enter new NT password: ",
|
|
"Retype new NT password: ",
|
|
(const char **) &pass_new);
|
|
|
|
if (retval != PAM_SUCCESS) {
|
|
_pam_log_debug(pamh, ctrl, LOG_ALERT
|
|
,"password - new password not obtained");
|
|
pass_old = NULL;/* tidy up */
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* At this point we know who the user is and what they
|
|
* propose as their new password. Verify that the new
|
|
* password is acceptable.
|
|
*/
|
|
|
|
if (pass_new[0] == '\0') {/* "\0" password = NULL */
|
|
pass_new = NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* By reaching here we have approved the passwords and must now
|
|
* rebuild the password database file.
|
|
*/
|
|
_pam_get_data( pamh, PAM_WINBIND_PWD_LAST_SET,
|
|
&pwdlastset_update);
|
|
|
|
retval = winbind_chauthtok_request(pamh, ctrl, user, pass_old, pass_new, pwdlastset_update);
|
|
if (retval) {
|
|
_pam_overwrite(pass_new);
|
|
_pam_overwrite(pass_old);
|
|
pass_old = pass_new = NULL;
|
|
goto out;
|
|
}
|
|
|
|
/* just in case we need krb5 creds after a password change over msrpc */
|
|
|
|
if (ctrl & WINBIND_KRB5_AUTH) {
|
|
|
|
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);
|
|
|
|
retval = winbind_auth_request(pamh, ctrl, user, pass_new,
|
|
member, cctype, False, NULL, NULL);
|
|
_pam_overwrite(pass_new);
|
|
_pam_overwrite(pass_old);
|
|
pass_old = pass_new = NULL;
|
|
}
|
|
} else {
|
|
retval = PAM_SERVICE_ERR;
|
|
}
|
|
|
|
out:
|
|
if (d) {
|
|
iniparser_freedict(d);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
#ifdef PAM_STATIC
|
|
|
|
/* static module data */
|
|
|
|
struct pam_module _pam_winbind_modstruct = {
|
|
MODULE_NAME,
|
|
pam_sm_authenticate,
|
|
pam_sm_setcred,
|
|
pam_sm_acct_mgmt,
|
|
pam_sm_open_session,
|
|
pam_sm_close_session,
|
|
pam_sm_chauthtok
|
|
};
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
|
|
* Copyright (c) Tim Potter <tpot@samba.org> 2000
|
|
* Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
|
|
* Copyright (c) Guenther Deschner <gd@samba.org> 2005-2006
|
|
* Copyright (c) Jan Rêkorajski 1999.
|
|
* Copyright (c) Andrew G. Morgan 1996-8.
|
|
* Copyright (c) Alex O. Yuriev, 1996.
|
|
* Copyright (c) Cristian Gafton 1996.
|
|
* Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, and the entire permission notice in its entirety,
|
|
* including the disclaimer of warranties.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote
|
|
* products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* ALTERNATIVELY, this product may be distributed under the terms of
|
|
* the GNU Public License, in which case the provisions of the GPL are
|
|
* required INSTEAD OF the above restrictions. (This clause is
|
|
* necessary due to a potential bad interaction between the GPL and
|
|
* the restrictions contained in a BSD-style copyright.)
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|