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 Christian Gafton <gafton@redhat.com>
+ 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 "includes.h"
#include "pam_winbind.h"
/* data tokens */
#define MAX_PASSWD_TRIES 3
+/*******************************************************************
+ Need this destructor to free global memory when the shared library
+ is unloaded
+*******************************************************************/
+
+void __attribute__ ((destructor)) _fini_pam_winbind(void)
+{
+ gfree_all();
+}
+
/* some syslogging */
static void _pam_log(int err, const char *format, ...)
{
closelog();
}
+static void _pam_log_debug(int ctrl, int err, const char *format, ...)
+{
+ va_list args;
+
+ if (!(ctrl & WINBIND_DEBUG_ARG)) {
+ return;
+ }
+
+ va_start(args, format);
+ openlog(MODULE_NAME, LOG_CONS|LOG_PID, LOG_AUTH);
+ vsyslog(err, format, args);
+ va_end(args);
+ closelog();
+}
+
static int _pam_parse(int argc, const char **argv)
{
- int ctrl;
+ int ctrl = 0;
+
+ load_case_tables();
+
+ if (!lp_load(dyn_CONFIGFILE,True,False,False,True)) {
+ return -1;
+ }
+
+ if (lp_parm_bool(-1, "pam_winbind", "cached_login", False)) {
+ ctrl |= WINBIND_CACHED_LOGIN;
+ }
+ if (lp_parm_bool(-1, "pam_winbind", "krb5_auth", False)) {
+ ctrl |= WINBIND_KRB5_AUTH;
+ }
+ if (lp_parm_const_string(-1, "pam_winbind", "krb5_ccache_type", NULL) != NULL) {
+ ctrl |= WINBIND_KRB5_CCACHE_TYPE;
+ }
+ if ((lp_parm_const_string(-1, "pam_winbind", "require-membership-of", NULL) != NULL) ||
+ (lp_parm_const_string(-1, "pam_winbind", "require_membership_of", NULL) != NULL)) {
+ ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
+ }
+
/* step through arguments */
- for (ctrl = 0; argc-- > 0; ++argv) {
+ for (; argc-- > 0; ++argv) {
/* generic options */
-
- if (!strcmp(*argv,"debug"))
+
+ if (!StrCaseCmp(*argv, "debug"))
ctrl |= WINBIND_DEBUG_ARG;
- else if (!strcasecmp(*argv, "use_authtok"))
+ else if (strequal(*argv, "use_authtok"))
ctrl |= WINBIND_USE_AUTHTOK_ARG;
- else if (!strcasecmp(*argv, "use_first_pass"))
+ else if (strequal(*argv, "use_first_pass"))
ctrl |= WINBIND_USE_FIRST_PASS_ARG;
- else if (!strcasecmp(*argv, "try_first_pass"))
+ else if (strequal(*argv, "try_first_pass"))
ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
- else if (!strcasecmp(*argv, "unknown_ok"))
+ else if (strequal(*argv, "unknown_ok"))
ctrl |= WINBIND_UNKNOWN_OK_ARG;
- else if (!strncasecmp(*argv, "require_membership_of", strlen("require_membership_of")))
+ else if (strnequal(*argv, "require_membership_of", strlen("require_membership_of")))
ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
- else if (!strncasecmp(*argv, "require-membership-of", strlen("require-membership-of")))
+ else if (strnequal(*argv, "require-membership-of", strlen("require-membership-of")))
ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
+ else if (strequal(*argv, "krb5_auth"))
+ ctrl |= WINBIND_KRB5_AUTH;
+ else if (strnequal(*argv, "krb5_ccache_type", strlen("krb5_ccache_type")))
+ ctrl |= WINBIND_KRB5_CCACHE_TYPE;
+ else if (strequal(*argv, "cached_login"))
+ ctrl |= WINBIND_CACHED_LOGIN;
else {
_pam_log(LOG_ERR, "pam_parse: unknown option; %s", *argv);
}
+
}
-
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 (strequal(ntstatus_errors[i].ntstatus_string, nt_status_string)) {
+ return ntstatus_errors[i].error_string;
+ }
+ }
+ return NULL;
}
/* --- authentication management functions --- */
struct pam_message **message,
struct pam_response **response)
{
- int retval;
- struct pam_conv *conv;
-
- retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv ) ;
- if (retval == PAM_SUCCESS) {
- retval = conv->conv(nargs, (const struct pam_message **)message,
- response, conv->appdata_ptr);
- }
+ int retval;
+ struct pam_conv *conv;
+
+ retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv );
+ if (retval == PAM_SUCCESS) {
+ retval = conv->conv(nargs, (const struct pam_message **)message,
+ response, conv->appdata_ptr);
+ }
- return retval; /* propagate error status */
+ return retval; /* propagate error status */
}
return retval;
}
-static int pam_winbind_request(enum winbindd_cmd req_type,
+static int _make_remark_format(pam_handle_t * pamh, int type, const char *format, ...)
+{
+ va_list args;
+ char *var;
+
+ va_start(args, format);
+ vasprintf(&var, format, args);
+ va_end(args);
+
+ return _make_remark(pamh, type, var);
+}
+
+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)) == -1) {
+ if (write_sock(request, sizeof(*request), 0) == -1) {
_pam_log(LOG_ERR, "write to socket failed!");
close_sock();
return PAM_SERVICE_ERR;
return PAM_SERVICE_ERR;
}
}
-
+
return PAM_SUCCESS;
}
-static int pam_winbind_request_log(enum winbindd_cmd req_type,
- struct winbindd_request *request,
- struct winbindd_response *response,
+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(req_type, request, response);
+ retval = pam_winbind_request(pamh, ctrl, req_type, request, response);
switch (retval) {
case PAM_AUTH_ERR:
_pam_log(LOG_WARNING, "user `%s' password expired", user);
return retval;
case PAM_NEW_AUTHTOK_REQD:
- /* password expired */
+ /* new password required */
_pam_log(LOG_WARNING, "user `%s' new password required", user);
return retval;
case PAM_USER_UNKNOWN:
/* the user does not exist */
- if (ctrl & WINBIND_DEBUG_ARG)
- _pam_log(LOG_NOTICE, "user `%s' not found",
+ _pam_log_debug(ctrl, LOG_NOTICE, "user `%s' not found",
user);
if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
return PAM_IGNORE;
/* Otherwise, the authentication looked good */
_pam_log(LOG_NOTICE, "user '%s' OK", user);
}
+
return retval;
default:
/* we don't know anything about this return value */
- _pam_log(LOG_ERR, "internal module error (retval = %d, user = `%s'",
+ _pam_log(LOG_ERR, "internal module error (retval = %d, user = `%s')",
retval, user);
return retval;
}
}
/* talk to winbindd */
-static int winbind_auth_request(const char *user, const char *pass, const char *member, int ctrl)
+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)
{
struct winbindd_request request;
struct winbindd_response response;
+ int ret;
ZERO_STRUCT(request);
+ ZERO_STRUCT(response);
strncpy(request.data.auth.user, user,
- sizeof(request.data.auth.user)-1);
+ sizeof(request.data.auth.user)-1);
strncpy(request.data.auth.pass, pass,
- sizeof(request.data.auth.pass)-1);
+ 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_GET_PWD_POLICY;
+
+ if (ctrl & WINBIND_KRB5_AUTH) {
+
+ struct passwd *pwd = NULL;
+
+ _pam_log_debug(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(ctrl, LOG_DEBUG, "enabling cached login flag\n");
+ request.flags |= WBFLAG_PAM_CACHED_LOGIN;
+ }
+
+ if (cctype != NULL) {
+ strncpy(request.data.auth.krb5_cc_type, cctype,
+ sizeof(request.data.auth.krb5_cc_type) - 1);
+ _pam_log_debug(ctrl, LOG_DEBUG, "enabling request for a %s krb5 ccache\n", cctype);
+ }
+
+ request.data.auth.require_membership_of_sid[0] = '\0';
- if (member == NULL )
- return pam_winbind_request_log(WINBINDD_PAM_AUTH, &request, &response, ctrl, user);
+ if (member != NULL) {
+ strncpy(request.data.auth.require_membership_of_sid, member,
+ sizeof(request.data.auth.require_membership_of_sid)-1);
+ }
/* lookup name? */
- if (!strncmp("S-", member, 2) == 0) {
+ if ( (member != NULL) && (strncmp("S-", member, 2) != 0) ) {
struct winbindd_request sid_request;
struct winbindd_response sid_response;
- ZERO_STRUCT(request);
- ZERO_STRUCT(response);
+ ZERO_STRUCT(sid_request);
+ ZERO_STRUCT(sid_response);
- if (ctrl & WINBIND_DEBUG_ARG)
- _pam_log(LOG_DEBUG, "no sid given, looking up: %s\n", member);
+ _pam_log_debug(ctrl, LOG_DEBUG, "no sid given, looking up: %s\n", member);
/* fortunatly winbindd can handle non-separated names */
- strcpy(request.data.name.name, member);
+ fstrcpy(sid_request.data.name.name, member);
- if (pam_winbind_request_log(WINBINDD_LOOKUPNAME, &request, &response, ctrl, user)) {
+ if (pam_winbind_request_log(pamh, ctrl, WINBINDD_LOOKUPNAME, &sid_request, &sid_response, user)) {
_pam_log(LOG_INFO, "could not lookup name: %s\n", member);
return PAM_AUTH_ERR;
}
- member = response.data.sid.sid;
+ 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 ((ctrl & WINBIND_KRB5_AUTH) &&
+ response.data.auth.krb5ccname[0] != '\0') {
- strncpy(request.data.auth.require_membership_of_sid, member,
- sizeof(request.data.auth.require_membership_of_sid)-1);
+ char var[PATH_MAX];
+
+ _pam_log_debug(ctrl, LOG_DEBUG, "request returned KRB5CCNAME: %s",
+ response.data.auth.krb5ccname);
+
+ snprintf(var, sizeof(var), "KRB5CCNAME=%s", response.data.auth.krb5ccname);
- return pam_winbind_request_log(WINBINDD_PAM_AUTH, &request, &response, ctrl, user);
+ ret = pam_putenv(pamh, var);
+ if (ret != PAM_SUCCESS) {
+ _pam_log(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(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");
+ }
+
+ /* save the CIFS homedir for pam_cifs / pam_mount */
+ if (response.data.auth.info3.home_dir[0] != '\0') {
+ char *buf;
+
+ if (!asprintf(&buf, "%s", response.data.auth.info3.home_dir)) {
+ return PAM_BUF_ERR;
+ }
+
+ pam_set_data( pamh, PAM_WINBIND_HOMEDIR, (void *)buf, _pam_winbind_cleanup_func);
+ }
+
+ return ret;
}
/* talk to winbindd */
-static int winbind_chauthtok_request(const char *user, const char *oldpass,
- const char *newpass, int ctrl)
+static int winbind_chauthtok_request(pam_handle_t * pamh,
+ int ctrl,
+ const char *user,
+ const char *oldpass,
+ const char *newpass)
{
struct winbindd_request request;
struct winbindd_response response;
+ int ret;
ZERO_STRUCT(request);
+ ZERO_STRUCT(response);
- if (request.data.chauthtok.user == NULL) return -2;
+ 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';
- }
+ 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';
+ }
- return pam_winbind_request_log(WINBINDD_PAM_CHAUTHTOK, &request, &response, ctrl, user);
+ 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;
+ }
+
+ 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 (strequal(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 0:
+ 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(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;
}
/*
* 0 = OK
* -1 = System error
*/
-static int valid_user(const char *user)
+static int valid_user(const char *user, pam_handle_t *pamh, int ctrl)
{
- if (getpwnam(user)) return 0;
- return 1;
+ /* 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;
+ }
+
+ fstrcpy(request.data.username, user);
+
+ 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;
+ _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)
+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;
if (retval == PAM_SUCCESS) { /* a good conversation */
- token = x_strdup(resp[i - replies].resp);
+ token = SMB_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)) {
+ || StrCaseCmp(token, resp[i - 1].resp)) {
_pam_delete(token); /* mistyped */
retval = PAM_AUTHTOK_RECOVER_ERR;
- _make_remark(pamh ,PAM_ERROR_MSG, MISTYPED_PASS);
+ _make_remark(pamh, PAM_ERROR_MSG, MISTYPED_PASS);
}
}
} else {
}
if (retval != PAM_SUCCESS) {
- if (on(WINBIND_DEBUG_ARG, ctrl))
- _pam_log(LOG_DEBUG,
+ _pam_log_debug(ctrl, LOG_DEBUG,
"unable to obtain a password");
return retval;
}
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
- ,(const void **) &item))
- != PAM_SUCCESS) {
+ if (retval != PAM_SUCCESS ||
+ (retval = pam_get_item(pamh, authtok_flag, (const void **) &item)) != PAM_SUCCESS) {
_pam_log(LOG_CRIT, "error manipulating password");
return retval;
return PAM_SUCCESS;
}
+const char *get_conf_item_string(int argc,
+ const char **argv,
+ int ctrl,
+ const char *item,
+ int flag)
+{
+ int i = 0;
+ char *parm = NULL;
+ const char *parm_opt = NULL;
+
+ if (!(ctrl & flag)) {
+ goto out;
+ }
+
+ /* let the pam opt take precedence over the smb.conf option */
+ parm_opt = lp_parm_const_string(-1, "pam_winbind", item, NULL);
+
+ for ( i=0; i<argc; i++ ) {
+
+ if ((strncmp(argv[i], item, strlen(item)) == 0)) {
+ char *p;
+
+ parm = SMB_STRDUP(argv[i]);
+
+ if ( (p = strchr( parm, '=' )) == NULL) {
+ _pam_log(LOG_INFO, "no \"=\" delimiter for \"%s\" found\n", item);
+ goto out;
+ }
+ SAFE_FREE(parm);
+ _pam_log_debug(ctrl, LOG_INFO, "PAM config: %s '%s'\n", item, p+1);
+ return p + 1;
+ }
+ }
+
+ _pam_log_debug(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(int argc, const char **argv, int ctrl)
+{
+ return get_conf_item_string(argc, argv, ctrl, "krb5_ccache_type", WINBIND_KRB5_CCACHE_TYPE);
+}
+
+const char *get_member_from_config(int argc, const char **argv, int ctrl)
+{
+ const char *ret = NULL;
+ ret = get_conf_item_string(argc, argv, ctrl, "require_membership_of", WINBIND_REQUIRED_MEMBERSHIP);
+ if (ret) {
+ return ret;
+ }
+ return get_conf_item_string(argc, argv, ctrl, "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;
- int retval = PAM_AUTH_ERR;
- int i;
-
- /* parse arguments */
- int ctrl = _pam_parse(argc, argv);
-
- /* Get the username */
- retval = pam_get_user(pamh, &username, NULL);
- if ((retval != PAM_SUCCESS) || (!username)) {
- if (ctrl & WINBIND_DEBUG_ARG)
- _pam_log(LOG_DEBUG,"can not get the username");
- return PAM_SERVICE_ERR;
- }
-
- retval = _winbind_read_password(pamh, ctrl, NULL,
- "Password: ", NULL,
- &password);
-
- if (retval != PAM_SUCCESS) {
- _pam_log(LOG_ERR, "Could not retrieve user's password");
- return PAM_AUTHTOK_ERR;
- }
-
- if (ctrl & WINBIND_DEBUG_ARG) {
-
- /* Let's not give too much away in the log file */
+ const char *username;
+ const char *password;
+ const char *member = NULL;
+ const char *cctype = NULL;
+ int retval = PAM_AUTH_ERR;
+
+ /* parse arguments */
+ int ctrl = _pam_parse(argc, argv);
+ if (ctrl == -1) {
+ return PAM_SYSTEM_ERR;
+ }
+
+ _pam_log_debug(ctrl, LOG_DEBUG,"pam_winbind: pam_sm_authenticate");
+
+ /* Get the username */
+ retval = pam_get_user(pamh, &username, NULL);
+ if ((retval != PAM_SUCCESS) || (!username)) {
+ _pam_log_debug(ctrl, LOG_DEBUG, "can not get the username");
+ return PAM_SERVICE_ERR;
+ }
+
+ retval = _winbind_read_password(pamh, ctrl, NULL,
+ "Password: ", NULL,
+ &password);
+
+ if (retval != PAM_SUCCESS) {
+ _pam_log(LOG_ERR, "Could not retrieve user's password");
+ return PAM_AUTHTOK_ERR;
+ }
+
+ /* Let's not give too much away in the log file */
#ifdef DEBUG_PASSWORD
- _pam_log(LOG_INFO, "Verify user `%s' with password `%s'",
- username, password);
+ _pam_log_debug(ctrl, LOG_INFO, "Verify user `%s' with password `%s'",
+ username, password);
#else
- _pam_log(LOG_INFO, "Verify user `%s'", username);
+ _pam_log_debug(ctrl, LOG_INFO, "Verify user `%s'", username);
#endif
- }
- /* Retrieve membership-string here */
- for ( i=0; i<argc; i++ ) {
+ member = get_member_from_config(argc, argv, ctrl);
+
+ cctype = get_krb5_cc_type_from_config(argc, argv, ctrl);
+
+ /* Now use the username to look up password */
+ retval = winbind_auth_request(pamh, ctrl, username, password, member, cctype, True);
- if (!strncmp(argv[i], "require_membership_of", strlen("require_membership_of"))) {
+ if (retval == PAM_NEW_AUTHTOK_REQD ||
+ retval == PAM_AUTHTOK_EXPIRED) {
- char *p;
- char *parm = strdup(argv[i]);
+ char *buf;
- if ( (p = strchr( parm, '=' )) == NULL) {
- _pam_log(LOG_INFO, "no \"=\" delimiter for \"required_membership\" found\n");
- break;
- }
+ if (!asprintf(&buf, "%d", retval)) {
+ return PAM_BUF_ERR;
+ }
+
+ pam_set_data( pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, (void *)buf, _pam_winbind_cleanup_func);
- member = strdup(p+1);
- }
- }
+ return PAM_SUCCESS;
+ }
- /* Now use the username to look up password */
- return winbind_auth_request(username, password, member, ctrl);
+ return retval;
}
PAM_EXTERN
int pam_sm_setcred(pam_handle_t *pamh, int flags,
int argc, const char **argv)
{
- return PAM_SUCCESS;
+ /* parse arguments */
+ int ctrl = _pam_parse(argc, argv);
+ if (ctrl == -1) {
+ return PAM_SYSTEM_ERR;
+ }
+
+ _pam_log_debug(ctrl, LOG_DEBUG,"pam_winbind: pam_sm_setcred");
+
+ if (flags & PAM_DELETE_CRED) {
+ return pam_sm_close_session(pamh, flags, argc, argv);
+ }
+
+ return PAM_SUCCESS;
}
/*
int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
int argc, const char **argv)
{
- const char *username;
- int retval = PAM_USER_UNKNOWN;
-
- /* parse arguments */
- int ctrl = _pam_parse(argc, argv);
-
- /* Get the username */
- retval = pam_get_user(pamh, &username, NULL);
- if ((retval != PAM_SUCCESS) || (!username)) {
- if (ctrl & WINBIND_DEBUG_ARG)
- _pam_log(LOG_DEBUG,"can not get the username");
- return PAM_SERVICE_ERR;
- }
-
- /* Verify the username */
- retval = valid_user(username);
- switch (retval) {
+ const char *username;
+ int retval = PAM_USER_UNKNOWN;
+ void *tmp = NULL;
+
+ /* parse arguments */
+ int ctrl = _pam_parse(argc, argv);
+ if (ctrl == -1) {
+ return PAM_SYSTEM_ERR;
+ }
+
+ _pam_log_debug(ctrl, LOG_DEBUG,"pam_winbind: pam_sm_acct_mgmt");
+
+
+ /* Get the username */
+ retval = pam_get_user(pamh, &username, NULL);
+ if ((retval != PAM_SUCCESS) || (!username)) {
+ _pam_log_debug(ctrl, LOG_DEBUG,"can not get the username");
+ return PAM_SERVICE_ERR;
+ }
+
+ /* Verify the username */
+ retval = valid_user(username, pamh, ctrl);
+ switch (retval) {
case -1:
- /* some sort of system error. The log was already printed */
- return PAM_SERVICE_ERR;
+ /* some sort of system error. The log was already printed */
+ return PAM_SERVICE_ERR;
case 1:
- /* the user does not exist */
- if (ctrl & WINBIND_DEBUG_ARG)
- _pam_log(LOG_NOTICE, "user `%s' not found",
- username);
- if (ctrl & WINBIND_UNKNOWN_OK_ARG)
- return PAM_IGNORE;
- return PAM_USER_UNKNOWN;
+ /* the user does not exist */
+ _pam_log_debug(ctrl, LOG_NOTICE, "user `%s' not found", username);
+ if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
+ return PAM_IGNORE;
+ }
+ return PAM_USER_UNKNOWN;
case 0:
- /* Otherwise, the authentication looked good */
- _pam_log(LOG_NOTICE, "user '%s' granted access", username);
- return PAM_SUCCESS;
+ pam_get_data( pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, (const void **)&tmp);
+ if (tmp != NULL) {
+ retval = atoi(tmp);
+ switch (retval) {
+ case PAM_AUTHTOK_EXPIRED:
+ /* fall through, since new token is required in this case */
+ case PAM_NEW_AUTHTOK_REQD:
+ _pam_log(LOG_WARNING, "pam_sm_acct_mgmt success but %s is set",
+ PAM_WINBIND_NEW_AUTHTOK_REQD);
+ _pam_log(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(LOG_WARNING, "pam_sm_acct_mgmt success");
+ _pam_log(LOG_NOTICE, "user '%s' granted access", username);
+ return PAM_SUCCESS;
+ }
+ }
+
+ /* Otherwise, the authentication looked good */
+ _pam_log(LOG_NOTICE, "user '%s' granted access", username);
+ return PAM_SUCCESS;
default:
- /* we don't know anything about this return value */
- _pam_log(LOG_ERR, "internal module error (retval = %d, user = `%s'",
- retval, username);
- return PAM_SERVICE_ERR;
- }
-
- /* should not be reached */
- return PAM_IGNORE;
+ /* we don't know anything about this return value */
+ _pam_log(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)
+ int argc, const char **argv)
{
- /* parse arguments */
- int ctrl = _pam_parse(argc, argv);
- if (ctrl & WINBIND_DEBUG_ARG)
- _pam_log(LOG_DEBUG,"libpam_winbind:pam_sm_open_session handler");
- return PAM_SUCCESS;
+ /* parse arguments */
+ int ctrl = _pam_parse(argc, argv);
+ if (ctrl == -1) {
+ return PAM_SYSTEM_ERR;
+ }
+
+ _pam_log_debug(ctrl, LOG_DEBUG,"pam_winbind: pam_sm_open_session handler");
+
+ return PAM_SUCCESS;
}
+
PAM_EXTERN
int pam_sm_close_session(pam_handle_t *pamh, int flags,
- int argc, const char **argv)
+ int argc, const char **argv)
{
- /* parse arguments */
- int ctrl = _pam_parse(argc, argv);
- if (ctrl & WINBIND_DEBUG_ARG)
- _pam_log(LOG_DEBUG,"libpam_winbind:pam_sm_close_session handler");
- return PAM_SUCCESS;
+ /* parse arguments */
+ int ctrl = _pam_parse(argc, argv);
+ if (ctrl == -1) {
+ return PAM_SYSTEM_ERR;
+ }
+
+ _pam_log_debug(ctrl, LOG_DEBUG,"pam_winbind: pam_sm_close_session handler");
+
+ if (!(flags & PAM_DELETE_CRED)) {
+ return PAM_SUCCESS;
+ }
+
+ 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;
+
+ int retval;
+
+ ZERO_STRUCT(request);
+ ZERO_STRUCT(response);
+
+ retval = pam_get_user(pamh, &user, "Username: ");
+ if (retval == PAM_SUCCESS) {
+ if (user == NULL) {
+ _pam_log(LOG_ERR, "username was NULL!");
+ return PAM_USER_UNKNOWN;
+ }
+ if (retval == PAM_SUCCESS) {
+ _pam_log_debug(ctrl, LOG_DEBUG, "username [%s] obtained", user);
+ }
+ } else {
+ _pam_log_debug(ctrl, LOG_DEBUG, "could not identify user");
+ return retval;
+ }
+
+ ccname = pam_getenv(pamh, "KRB5CCNAME");
+ if (ccname == NULL) {
+ _pam_log_debug(ctrl, LOG_DEBUG, "user has no KRB5CCNAME environment");
+ return PAM_SUCCESS;
+ }
+
+ fstrcpy(request.data.logoff.user, user);
+ fstrcpy(request.data.logoff.krb5ccname, ccname);
+
+ pwd = getpwnam(user);
+ if (pwd == NULL) {
+ return PAM_USER_UNKNOWN;
+ }
+ request.data.logoff.uid = pwd->pw_uid;
+
+ request.flags = WBFLAG_PAM_KRB5;
+
+ return pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_LOGOFF, &request, &response, user);
+ }
+
+ return PAM_SUCCESS;
}
-PAM_EXTERN int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
- int argc, const char **argv)
+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 = _pam_parse(argc, argv);
+ unsigned int ctrl;
/* <DO NOT free() THESE> */
const char *user;
- const char *member = NULL;
char *pass_old, *pass_new;
/* </DO NOT free() THESE> */
- char *Announce;
+ fstring Announce;
int retry = 0;
+ ctrl = _pam_parse(argc, argv);
+ if (ctrl == -1) {
+ return PAM_SYSTEM_ERR;
+ }
+
+ _pam_log_debug(ctrl, LOG_DEBUG,"pam_winbind: pam_sm_chauthtok");
+
/*
* First get the name of a user
*/
_pam_log(LOG_ERR, "username was NULL!");
return PAM_USER_UNKNOWN;
}
- if (retval == PAM_SUCCESS && on(WINBIND_DEBUG_ARG, ctrl))
- _pam_log(LOG_DEBUG, "username [%s] obtained",
+ if (retval == PAM_SUCCESS) {
+ _pam_log_debug(ctrl, LOG_DEBUG, "username [%s] obtained",
user);
+ }
} else {
- if (on(WINBIND_DEBUG_ARG, ctrl))
- _pam_log(LOG_DEBUG,
- "password - could not identify user");
+ _pam_log_debug(ctrl, LOG_DEBUG,
+ "password - could not identify user");
return retval;
}
+ /* check if this is really a user in winbindd, not only in NSS */
+ retval = valid_user(user, pamh, ctrl);
+ switch (retval) {
+ case 1:
+ return PAM_USER_UNKNOWN;
+ case -1:
+ return PAM_SYSTEM_ERR;
+ default:
+ break;
+ }
+
/*
* obtain and verify the current password (OLDAUTHTOK) for
* the user.
/* instruct user what is happening */
#define greeting "Changing password for "
- Announce = (char *) malloc(sizeof(greeting) + strlen(user));
- if (Announce == NULL) {
- _pam_log(LOG_CRIT,
- "password - out of memory");
- return PAM_BUF_ERR;
- }
- (void) strcpy(Announce, greeting);
- (void) strcpy(Announce + sizeof(greeting) - 1, user);
+ fstrcpy(Announce, greeting);
+ fstrcat(Announce, user);
#undef greeting
lctrl = ctrl | WINBIND__OLD_PASSWORD;
- retval = _winbind_read_password(pamh, lctrl
- ,Announce
- ,"(current) NT password: "
- ,NULL
- ,(const char **) &pass_old);
- free(Announce);
-
+ retval = _winbind_read_password(pamh, lctrl,
+ Announce,
+ "(current) NT password: ",
+ NULL,
+ (const char **) &pass_old);
if (retval != PAM_SUCCESS) {
- _pam_log(LOG_NOTICE
- ,"password - (old) token not obtained");
+ _pam_log(LOG_NOTICE, "password - (old) token not obtained");
return retval;
}
/* verify that this is the password for this user */
- retval = winbind_auth_request(user, pass_old, member, ctrl);
-
+ retval = winbind_auth_request(pamh, ctrl, user, pass_old, NULL, NULL, False);
+
if (retval != PAM_ACCT_EXPIRED
&& retval != PAM_AUTHTOK_EXPIRED
&& retval != PAM_NEW_AUTHTOK_REQD
retval = pam_set_item(pamh, PAM_OLDAUTHTOK, (const void *) pass_old);
pass_old = NULL;
if (retval != PAM_SUCCESS) {
- _pam_log(LOG_CRIT,
- "failed to set PAM_OLDAUTHTOK");
+ _pam_log(LOG_CRIT, "failed to set PAM_OLDAUTHTOK");
}
} else if (flags & PAM_UPDATE_AUTHTOK) {
* get the old token back.
*/
- retval = pam_get_item(pamh, PAM_OLDAUTHTOK
- ,(const void **) &pass_old);
+ retval = pam_get_item(pamh, PAM_OLDAUTHTOK,
+ (const void **) &pass_old);
if (retval != PAM_SUCCESS) {
_pam_log(LOG_NOTICE, "user not authenticated");
lctrl = ctrl;
if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
- ctrl = WINBIND_USE_FIRST_PASS_ARG | lctrl;
+ lctrl |= WINBIND_USE_FIRST_PASS_ARG;
}
retry = 0;
retval = PAM_AUTHTOK_ERR;
* 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);
+ retval = _winbind_read_password(pamh, lctrl,
+ NULL,
+ "Enter new NT password: ",
+ "Retype new NT password: ",
+ (const char **) &pass_new);
if (retval != PAM_SUCCESS) {
- if (on(WINBIND_DEBUG_ARG, ctrl)) {
- _pam_log(LOG_ALERT
- ,"password - new password not obtained");
- }
+ _pam_log_debug(ctrl, LOG_ALERT
+ ,"password - new password not obtained");
pass_old = NULL;/* tidy up */
return retval;
}
* rebuild the password database file.
*/
- retval = winbind_chauthtok_request(user, pass_old, pass_new, ctrl);
- _pam_overwrite(pass_new);
- _pam_overwrite(pass_old);
- pass_old = pass_new = NULL;
+ retval = winbind_chauthtok_request(pamh, ctrl, user, pass_old, pass_new);
+ if (retval) {
+ _pam_overwrite(pass_new);
+ _pam_overwrite(pass_old);
+ pass_old = pass_new = NULL;
+ return retval;
+ }
+
+ /* 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(argc, argv, ctrl);
+ const char *cctype = get_krb5_cc_type_from_config(argc, argv, ctrl);
+
+ retval = winbind_auth_request(pamh, ctrl, user, pass_new, member, cctype, False);
+ _pam_overwrite(pass_new);
+ _pam_overwrite(pass_old);
+ pass_old = pass_new = NULL;
+ }
} else {
retval = PAM_SERVICE_ERR;
}
-
+
return retval;
}
/* 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
+ 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.
git.samba.org / tprouty / samba.git / blobdiff