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> 2005-2007
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>
#include "pam_winbind.h"
+#define _PAM_LOG_FUNCTION_ENTER(function, pamh, ctrl, flags) \
+ do { \
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: 0x%08x] ENTER: " function " (flags: 0x%04x)", (uint32) pamh, flags); \
+ _pam_log_state(pamh, ctrl); \
+ } while (0)
+
+#define _PAM_LOG_FUNCTION_LEAVE(function, pamh, ctrl, retval) \
+ do { \
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: 0x%08x] LEAVE: " function " returning %d", (uint32) pamh, retval); \
+ _pam_log_state(pamh, ctrl); \
+ } while (0)
+
/* 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 err, const char *format, ...)
+
+#ifdef HAVE_PAM_VSYSLOG
+static void _pam_log_int(const pam_handle_t *pamh, int err, const char *format, va_list args)
+{
+ pam_vsyslog(pamh, err, format, args);
+}
+#else
+static void _pam_log_int(const pam_handle_t *pamh, int err, const char *format, va_list args)
+{
+ 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 /* HAVE_PAM_VSYSLOG */
+
+static BOOL _pam_log_is_silent(int ctrl)
+{
+ return on(ctrl, WINBIND_SILENT);
+}
+
+static void _pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
+static void _pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
{
va_list args;
+ if (_pam_log_is_silent(ctrl)) {
+ return;
+ }
+
+ va_start(args, format);
+ _pam_log_int(pamh, err, format, args);
+ va_end(args);
+}
+
+static BOOL _pam_log_is_debug_enabled(int ctrl)
+{
+ if (ctrl == -1) {
+ return False;
+ }
+
+ if (_pam_log_is_silent(ctrl)) {
+ return False;
+ }
+
+ if (!(ctrl & WINBIND_DEBUG_ARG)) {
+ return False;
+ }
+
+ return True;
+}
+
+static BOOL _pam_log_is_debug_state_enabled(int ctrl)
+{
+ if (!(ctrl & WINBIND_DEBUG_STATE)) {
+ return False;
+ }
+
+ return _pam_log_is_debug_enabled(ctrl);
+}
+
+static void _pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
+static void _pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
+{
+ va_list args;
+
+ if (!_pam_log_is_debug_enabled(ctrl)) {
+ return;
+ }
+
va_start(args, format);
- openlog(MODULE_NAME, LOG_CONS|LOG_PID, LOG_AUTH);
- vsyslog(err, format, args);
+ _pam_log_int(pamh, err, format, args);
va_end(args);
- closelog();
}
-static int _pam_parse(int argc, const char **argv)
+static void _pam_log_state_datum(const pam_handle_t *pamh, int ctrl, int item_type, const char *key, int is_string)
+{
+ const void *data = NULL;
+ if (item_type != 0) {
+ pam_get_item(pamh, item_type, &data);
+ } else {
+ pam_get_data(pamh, key, &data);
+ }
+ if (data != NULL) {
+ const char *type = (item_type != 0) ? "ITEM" : "DATA";
+ if (is_string != 0) {
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: 0x%08x] STATE: %s(%s) = \"%s\" (0x%08x)", (uint32) pamh, type, key, (const char *) data, (uint32) data);
+ } else {
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: 0x%08x] STATE: %s(%s) = 0x%08x", (uint32) pamh, type, key, (uint32) data);
+ }
+ }
+}
+
+#define _PAM_LOG_STATE_DATA_POINTER(pamh, ctrl, module_data_name) \
+ _pam_log_state_datum(pamh, ctrl, 0, module_data_name, 0)
+
+#define _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, module_data_name) \
+ _pam_log_state_datum(pamh, ctrl, 0, module_data_name, 1)
+
+#define _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, item_type) \
+ _pam_log_state_datum(pamh, ctrl, item_type, #item_type, 0)
+
+#define _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, item_type) \
+ _pam_log_state_datum(pamh, ctrl, item_type, #item_type, 1)
+
+#ifdef DEBUG_PASSWORD
+#define _LOG_PASSWORD_AS_STRING 1
+#else
+#define _LOG_PASSWORD_AS_STRING 0
+#endif
+
+#define _PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, item_type) \
+ _pam_log_state_datum(pamh, ctrl, item_type, #item_type, _LOG_PASSWORD_AS_STRING)
+
+static void _pam_log_state(const pam_handle_t *pamh, int ctrl)
{
- int ctrl;
+ if (!_pam_log_is_debug_state_enabled(ctrl)) {
+ return;
+ }
+
+ _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_SERVICE);
+ _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_USER);
+ _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_TTY);
+ _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_RHOST);
+ _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_RUSER);
+ _PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, PAM_OLDAUTHTOK);
+ _PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, PAM_AUTHTOK);
+ _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_USER_PROMPT);
+ _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, PAM_CONV);
+#ifdef PAM_FAIL_DELAY
+ _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, PAM_FAIL_DELAY);
+#endif
+#ifdef PAM_REPOSITORY
+ _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, PAM_REPOSITORY);
+#endif
+
+ _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_HOMEDIR);
+ _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_LOGONSCRIPT);
+ _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_LOGONSERVER);
+ _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_PROFILEPATH);
+ _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_NEW_AUTHTOK_REQD); /* Use atoi to get PAM result code */
+ _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
+ _PAM_LOG_STATE_DATA_POINTER(pamh, ctrl, PAM_WINBIND_PWD_LAST_SET);
+}
+
+static int _pam_parse(const pam_handle_t *pamh, int flags, int argc, const char **argv, dictionary **result_d)
+{
+ int ctrl = 0;
+ const char *config_file = NULL;
+ int i;
+ const char **v;
+ dictionary *d = NULL;
+
+ if (flags & PAM_SILENT) {
+ ctrl |= WINBIND_SILENT;
+ }
+
+ 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(config_file);
+ if (d == NULL) {
+ goto config_from_pam;
+ }
+
+ if (iniparser_getboolean(d, "global:debug", False)) {
+ ctrl |= WINBIND_DEBUG_ARG;
+ }
+
+ if (iniparser_getboolean(d, "global:debug_state", False)) {
+ ctrl |= WINBIND_DEBUG_STATE;
+ }
+
+ if (iniparser_getboolean(d, "global:cached_login", False)) {
+ ctrl |= WINBIND_CACHED_LOGIN;
+ }
+
+ if (iniparser_getboolean(d, "global:krb5_auth", False)) {
+ ctrl |= WINBIND_KRB5_AUTH;
+ }
+
+ if (iniparser_getboolean(d, "global:silent", False)) {
+ ctrl |= WINBIND_SILENT;
+ }
+
+ if (iniparser_getstr(d, "global:krb5_ccache_type") != NULL) {
+ ctrl |= WINBIND_KRB5_CCACHE_TYPE;
+ }
+
+ if ((iniparser_getstr(d, "global:require-membership-of") != NULL) ||
+ (iniparser_getstr(d, "global:require_membership_of") != NULL)) {
+ ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
+ }
+
+ if (iniparser_getboolean(d, "global:try_first_pass", False)) {
+ ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
+ }
+
+config_from_pam:
/* step through arguments */
- for (ctrl = 0; argc-- > 0; ++argv) {
+ for (i=argc,v=argv; i-- > 0; ++v) {
/* generic options */
-
- if (!strcmp(*argv,"debug"))
+ if (!strcmp(*v,"debug"))
ctrl |= WINBIND_DEBUG_ARG;
- else if (!strcasecmp(*argv, "use_authtok"))
+ else if (!strcasecmp(*v, "debug_state"))
+ ctrl |= WINBIND_DEBUG_STATE;
+ else if (!strcasecmp(*v, "silent"))
+ ctrl |= WINBIND_SILENT;
+ else if (!strcasecmp(*v, "use_authtok"))
ctrl |= WINBIND_USE_AUTHTOK_ARG;
- else if (!strcasecmp(*argv, "use_first_pass"))
+ else if (!strcasecmp(*v, "use_first_pass"))
ctrl |= WINBIND_USE_FIRST_PASS_ARG;
- else if (!strcasecmp(*argv, "try_first_pass"))
+ else if (!strcasecmp(*v, "try_first_pass"))
ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
- else if (!strcasecmp(*argv, "unknown_ok"))
+ else if (!strcasecmp(*v, "unknown_ok"))
ctrl |= WINBIND_UNKNOWN_OK_ARG;
- else if (!strncasecmp(*argv, "require_membership_of", strlen("require_membership_of")))
+ else if (!strncasecmp(*v, "require_membership_of", strlen("require_membership_of")))
ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
- else if (!strncasecmp(*argv, "require-membership-of", strlen("require-membership-of")))
+ 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(LOG_ERR, "pam_parse: unknown option; %s", *argv);
+ _pam_log(pamh, ctrl, LOG_ERR, "pam_parse: unknown option: %s", *v);
+ return -1;
+ }
+
+ }
+
+ if (result_d) {
+ *result_d = d;
+ } else {
+ if (d) {
+ iniparser_freedict(d);
}
}
-
+
return ctrl;
-}
+};
static void _pam_winbind_cleanup_func(pam_handle_t *pamh, void *data, int error_status)
{
+ int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
+ if (_pam_log_is_debug_state_enabled(ctrl)) {
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: 0x%08x] CLEAN: cleaning up PAM data 0x%08x (error_status = %d)", (uint32) pamh, (uint32) data, 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_DOMAIN_CONTROLLER_NOT_FOUND", "No domain controllers found"},
+ {"NT_STATUS_NO_LOGON_SERVERS", "No logon servers"},
+ {"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 */
struct pam_message **message,
struct pam_response **response)
{
- int retval;
- struct pam_conv *conv;
+ 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);
- }
+ 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 */
+ return retval; /* propagate error status */
}
-static int _make_remark(pam_handle_t * pamh, int type, const char *text)
+static int _make_remark(pam_handle_t * pamh, int flags, int type, const char *text)
{
int retval = PAM_SUCCESS;
struct pam_message *pmsg[1], msg[1];
struct pam_response *resp;
+ if (flags & WINBIND_SILENT) {
+ return PAM_SUCCESS;
+ }
+
pmsg[0] = &msg[0];
- msg[0].msg = text;
+ msg[0].msg = CONST_DISCARD(char *, text);
msg[0].msg_style = type;
resp = NULL;
return retval;
}
-static int pam_winbind_request(enum winbindd_cmd req_type,
+static int _make_remark_v(pam_handle_t * pamh, int flags, int type, const char *format, va_list args)
+{
+ char *var;
+ int ret;
+
+ ret = vasprintf(&var, format, args);
+ if (ret < 0) {
+ _pam_log(pamh, 0, LOG_ERR, "memory allocation failure");
+ return ret;
+ }
+
+ ret = _make_remark(pamh, flags, type, var);
+ SAFE_FREE(var);
+ return ret;
+}
+
+static int _make_remark_format(pam_handle_t * pamh, int flags, int type, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
+static int _make_remark_format(pam_handle_t * pamh, int flags, int type, const char *format, ...)
+{
+ int ret;
+ va_list args;
+
+ va_start(args, format);
+ ret = _make_remark_v(pamh, flags, type, format, args);
+ va_end(args);
+ 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(LOG_ERR, "write to socket failed!");
+ if (write_sock(request, sizeof(*request), 0, 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(LOG_ERR, "read from socket failed!");
+ _pam_log(pamh, ctrl, LOG_ERR, "pam_winbind_request: read from socket failed!");
close_sock();
return PAM_SERVICE_ERR;
}
close_sock();
/* Copy reply data from socket */
- if (response->result != WINBINDD_OK) {
- if (response->data.auth.pam_error != PAM_SUCCESS) {
- _pam_log(LOG_ERR, "request failed: %s, PAM error was %d, NT error was %s",
- response->data.auth.error_string,
- response->data.auth.pam_error,
- response->data.auth.nt_status_string);
- return response->data.auth.pam_error;
- } else {
- _pam_log(LOG_ERR, "request failed, but PAM error 0!");
- return PAM_SERVICE_ERR;
- }
+ if (response->result == WINBINDD_OK) {
+ return PAM_SUCCESS;
}
+
+ /* no need to check for pam_error codes for getpwnam() */
+ switch (req_type) {
+
+ case WINBINDD_GETPWNAM:
+ case WINBINDD_LOOKUPNAME:
+ if (strlen(response->data.auth.nt_status_string) > 0) {
+ _pam_log(pamh, ctrl, LOG_ERR, "request failed, NT error was %s",
+ response->data.auth.nt_status_string);
+ } else {
+ _pam_log(pamh, ctrl, LOG_ERR, "request failed");
+ }
+ return PAM_USER_UNKNOWN;
+ default:
+ break;
+ }
+
+ 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;
+ }
- return PAM_SUCCESS;
+ _pam_log(pamh, ctrl, LOG_ERR, "request failed, but PAM error 0!");
+
+ return PAM_SERVICE_ERR;
}
-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:
/* incorrect password */
- _pam_log(LOG_WARNING, "user `%s' denied access (incorrect password or invalid membership)", user);
+ _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(LOG_WARNING, "user `%s' account expired", user);
+ _pam_log(pamh, ctrl, LOG_WARNING, "user '%s' account expired", user);
return retval;
case PAM_AUTHTOK_EXPIRED:
/* password expired */
- _pam_log(LOG_WARNING, "user `%s' password expired", user);
+ _pam_log(pamh, ctrl, LOG_WARNING, "user '%s' password expired", user);
return retval;
case PAM_NEW_AUTHTOK_REQD:
- /* password expired */
- _pam_log(LOG_WARNING, "user `%s' new password required", user);
+ /* 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 */
- if (ctrl & WINBIND_DEBUG_ARG)
- _pam_log(LOG_NOTICE, "user `%s' not found",
- user);
+ _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(LOG_NOTICE, "user '%s' granted access", user);
- } else if (req_type == WINBINDD_PAM_CHAUTHTOK) {
- /* Otherwise, the authentication looked good */
- _pam_log(LOG_NOTICE, "user '%s' password changed", user);
- } else {
- /* Otherwise, the authentication looked good */
- _pam_log(LOG_NOTICE, "user '%s' OK", user);
+ /* Otherwise, the authentication looked good */
+ switch (req_type) {
+ case WINBINDD_INFO:
+ break;
+ case WINBINDD_PAM_AUTH:
+ _pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' granted access", user);
+ break;
+ case WINBINDD_PAM_CHAUTHTOK:
+ _pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' password changed", user);
+ break;
+ default:
+ _pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' OK", user);
+ break;
}
+
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(pamh, ctrl, LOG_ERR, "internal module error (retval = %d, user = '%s')",
retval, user);
return retval;
}
}
+/**
+ * send a password expiry message if required
+ *
+ * @param pamh PAM handle
+ * @param ctrl PAM winbind options.
+ * @param next_change expected (calculated) next expiry date.
+ * @param already_expired pointer to a boolean to indicate if the password is
+ * already expired.
+ *
+ * @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,
+ int warn_pwd_expire,
+ BOOL *already_expired)
+{
+ int days = 0;
+ struct tm tm_now, tm_next_change;
+
+ if (already_expired) {
+ *already_expired = False;
+ }
+
+ if (next_change <= now) {
+ PAM_WB_REMARK_DIRECT(pamh, ctrl, "NT_STATUS_PASSWORD_EXPIRED");
+ if (already_expired) {
+ *already_expired = True;
+ }
+ return True;
+ }
+
+ if ((next_change < 0) ||
+ (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
+ return False;
+ }
+
+ if ((localtime_r(&now, &tm_now) == NULL) ||
+ (localtime_r(&next_change, &tm_next_change) == NULL)) {
+ return False;
+ }
+
+ days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) - (tm_now.tm_yday+tm_now.tm_year*365);
+
+ if (days == 0) {
+ _make_remark(pamh, ctrl, PAM_TEXT_INFO, "Your password expires today");
+ return True;
+ }
+
+ 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;
+ }
+
+ return False;
+}
+
+/**
+ * Send a warning if the password expires in the near future
+ *
+ * @param pamh PAM handle
+ * @param ctrl PAM winbind options.
+ * @param response The full authentication response structure.
+ * @param already_expired boolean, is the pwd already expired?
+ *
+ * @return void.
+ */
+
+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);
+ time_t next_change = 0;
+
+ if (already_expired) {
+ *already_expired = False;
+ }
+
+ /* accounts with ACB_PWNOEXP set never receive a warning */
+ if (response->data.auth.info3.acct_flags & ACB_PWNOEXP) {
+ return;
+ }
+
+ /* no point in sending a warning if this is a grace logon */
+ if (PAM_WB_GRACE_LOGON(response->data.auth.info3.user_flgs)) {
+ return;
+ }
+
+ /* 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,
+ warn_pwd_expire,
+ already_expired)) {
+ return;
+ }
+
+ /* now check for the global password policy */
+ /* good catch from Ralf Haferkamp: an expiry of "never" is translated
+ * to -1 */
+ if (response->data.auth.policy.expire <= 0) {
+ return;
+ }
+
+ 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,
+ warn_pwd_expire,
+ already_expired)) {
+ return;
+ }
+
+ /* no warning sent */
+}
+
+#define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
+
+static BOOL safe_append_string(char *dest,
+ const char *src,
+ int dest_buffer_size)
+/**
+ * Append a string, making sure not to overflow and to always return a NULL-terminated
+ * string.
+ *
+ * @param dest Destination string buffer (must already be NULL-terminated).
+ * @param src Source string buffer.
+ * @param dest_buffer_size Size of dest buffer in bytes.
+ *
+ * @return False if dest buffer is not big enough (no bytes copied), True on success.
+ */
+{
+ int dest_length = strlen(dest);
+ int src_length = strlen(src);
+
+ if ( dest_length + src_length + 1 > dest_buffer_size ) {
+ return False;
+ }
+
+ memcpy(dest + dest_length, src, src_length + 1);
+ return True;
+}
+
+static BOOL winbind_name_to_sid_string(pam_handle_t *pamh,
+ int ctrl,
+ const char *user,
+ const char *name,
+ char *sid_list_buffer,
+ int sid_list_buffer_size)
+/**
+ * Convert a names into a SID string, appending it to a buffer.
+ *
+ * @param pamh PAM handle
+ * @param ctrl PAM winbind options.
+ * @param user User in PAM request.
+ * @param name Name to convert.
+ * @param sid_list_buffer Where to append the string sid.
+ * @param sid_list_buffer Size of sid_list_buffer (in bytes).
+ *
+ * @return False on failure, True on success.
+ */
+{
+ const char* sid_string;
+ struct winbindd_response sid_response;
+
+ /* lookup name? */
+ if (IS_SID_STRING(name)) {
+ sid_string = name;
+ } else {
+ struct winbindd_request sid_request;
+
+ ZERO_STRUCT(sid_request);
+ ZERO_STRUCT(sid_response);
+
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG, "no sid given, looking up: %s\n", name);
+
+ /* fortunatly winbindd can handle non-separated names */
+ strncpy(sid_request.data.name.name, name,
+ 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", name);
+ return False;
+ }
+
+ sid_string = sid_response.data.sid.sid;
+ }
+
+ if (!safe_append_string(sid_list_buffer, sid_string, sid_list_buffer_size)) {
+ return False;
+ }
+
+ return True;
+}
+
+static BOOL winbind_name_list_to_sid_string_list(pam_handle_t *pamh,
+ int ctrl,
+ const char *user,
+ const char *name_list,
+ char *sid_list_buffer,
+ int sid_list_buffer_size)
+/**
+ * Convert a list of names into a list of sids.
+ *
+ * @param pamh PAM handle
+ * @param ctrl PAM winbind options.
+ * @param user User in PAM request.
+ * @param name_list List of names or string sids, separated by commas.
+ * @param sid_list_buffer Where to put the list of string sids.
+ * @param sid_list_buffer Size of sid_list_buffer (in bytes).
+ *
+ * @return False on failure, True on success.
+ */
+{
+ BOOL result = False;
+ char *current_name = NULL;
+ const char *search_location;
+ const char *comma;
+
+ if ( sid_list_buffer_size > 0 ) {
+ sid_list_buffer[0] = 0;
+ }
+
+ search_location = name_list;
+ while ( (comma = strstr(search_location, ",")) != NULL ) {
+ current_name = strndup(search_location, comma - search_location);
+ if (NULL == current_name) {
+ goto out;
+ }
+
+ if (!winbind_name_to_sid_string(pamh, ctrl, user, current_name, sid_list_buffer, sid_list_buffer_size)) {
+ goto out;
+ }
+
+ SAFE_FREE(current_name);
+
+ if (!safe_append_string(sid_list_buffer, ",", sid_list_buffer_size)) {
+ goto out;
+ }
+
+ search_location = comma + 1;
+ }
+
+ if (!winbind_name_to_sid_string(pamh, ctrl, user, search_location, sid_list_buffer, sid_list_buffer_size)) {
+ goto out;
+ }
+
+ result = True;
+
+out:
+ SAFE_FREE(current_name);
+ return result;
+}
+
+/**
+ * put krb5ccname variable into environment
+ *
+ * @param pamh PAM handle
+ * @param ctrl PAM winbind options.
+ * @param krb5ccname env variable retrieved from winbindd.
+ *
+ * @return void.
+ */
+
+static void _pam_setup_krb5_env(pam_handle_t *pamh, int ctrl, const char *krb5ccname)
+{
+ char var[PATH_MAX];
+ int ret;
+
+ if (off(ctrl, WINBIND_KRB5_AUTH)) {
+ return;
+ }
+
+ if (!krb5ccname || (strlen(krb5ccname) == 0)) {
+ return;
+ }
+
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG, "request returned KRB5CCNAME: %s", krb5ccname);
+
+ if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
+ return;
+ }
+
+ ret = pam_putenv(pamh, var);
+ if (ret) {
+ _pam_log(pamh, ctrl, LOG_ERR, "failed to set KRB5CCNAME to %s: %s",
+ var, pam_strerror(pamh, ret));
+ }
+}
+
+/**
+ * Set string into the PAM stack.
+ *
+ * @param pamh PAM handle
+ * @param ctrl PAM winbind options.
+ * @param data_name Key name for pam_set_data.
+ * @param value String value.
+ *
+ * @return void.
+ */
+
+static void _pam_set_data_string(pam_handle_t *pamh, int ctrl, const char *data_name, const char *value)
+{
+ int ret;
+
+ if ( !data_name || !value || (strlen(data_name) == 0) || (strlen(value) == 0) ) {
+ return;
+ }
+
+ ret = pam_set_data(pamh, data_name, (void *)strdup(value), _pam_winbind_cleanup_func);
+ if (ret) {
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG, "Could not set data %s: %s\n",
+ data_name, pam_strerror(pamh, ret));
+ }
+
+}
+
+/**
+ * Set info3 strings into the PAM stack.
+ *
+ * @param pamh PAM handle
+ * @param ctrl PAM winbind options.
+ * @param data_name Key name for pam_set_data.
+ * @param value String value.
+ *
+ * @return void.
+ */
+
+static void _pam_set_data_info3(pam_handle_t *pamh, int ctrl, struct winbindd_response *response)
+{
+ _pam_set_data_string(pamh, ctrl, PAM_WINBIND_HOMEDIR, response->data.auth.info3.home_dir);
+ _pam_set_data_string(pamh, ctrl, PAM_WINBIND_LOGONSCRIPT, response->data.auth.info3.logon_script);
+ _pam_set_data_string(pamh, ctrl, PAM_WINBIND_LOGONSERVER, response->data.auth.info3.logon_srv);
+ _pam_set_data_string(pamh, ctrl, PAM_WINBIND_PROFILEPATH, response->data.auth.info3.profile_path);
+}
+
+/**
+ * Free info3 strings in the PAM stack.
+ *
+ * @param pamh PAM handle
+ *
+ * @return void.
+ */
+
+static void _pam_free_data_info3(pam_handle_t *pamh)
+{
+ pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
+ pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
+ pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
+ pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
+}
+
+/**
+ * Send PAM_ERROR_MSG for cached or grace logons.
+ *
+ * @param pamh PAM handle
+ * @param ctrl PAM winbind options.
+ * @param username User in PAM request.
+ * @param info3_user_flgs Info3 flags containing logon type bits.
+ *
+ * @return void.
+ */
+
+static void _pam_warn_logon_type(pam_handle_t *pamh, int ctrl, const char *username, uint32 info3_user_flgs)
+{
+ /* inform about logon type */
+ if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
+
+ _make_remark(pamh, ctrl, PAM_ERROR_MSG,
+ "Grace login. Please change your password as soon you're online again");
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG,
+ "User %s logged on using grace logon\n", username);
+
+ } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
+
+ _make_remark(pamh, ctrl, PAM_ERROR_MSG,
+ "Domain Controller unreachable, using cached credentials instead. Network resources may be unavailable");
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG,
+ "User %s logged on using cached credentials\n", username);
+ }
+}
+
+/**
+ * Send PAM_ERROR_MSG for krb5 errors.
+ *
+ * @param pamh PAM handle
+ * @param ctrl PAM winbind options.
+ * @param username User in PAM request.
+ * @param info3_user_flgs Info3 flags containing logon type bits.
+ *
+ * @return void.
+ */
+
+static void _pam_warn_krb5_failure(pam_handle_t *pamh, int ctrl, const char *username, uint32 info3_user_flgs)
+{
+ if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
+ _make_remark(pamh, ctrl, PAM_ERROR_MSG,
+ "Failed to establish your Kerberos Ticket cache "
+ "due time differences\n"
+ "with the domain controller. "
+ "Please verify the system time.\n");
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG,
+ "User %s: Clock skew when getting Krb5 TGT\n", username);
+ }
+}
+
+/**
+ * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
+ *
+ * @param response The struct winbindd_response.
+ *
+ * @return string (caller needs to free).
+ */
+
+static char *_pam_compose_pwd_restriction_string(struct winbindd_response *response)
+{
+ char *str = NULL;
+ size_t offset = 0, ret = 0, str_size = 1024;
+
+ str = (char *)malloc(str_size);
+ if (!str) {
+ return NULL;
+ }
+
+ memset(str, '\0', str_size);
+
+ offset = snprintf(str, str_size, "Your password ");
+ if (offset == -1) {
+ goto failed;
+ }
+
+ if (response->data.auth.policy.min_length_password > 0) {
+ ret = snprintf(str+offset, str_size-offset,
+ "must be at least %d characters; ",
+ response->data.auth.policy.min_length_password);
+ if (ret == -1) {
+ goto failed;
+ }
+ offset += ret;
+ }
+
+ if (response->data.auth.policy.password_history > 0) {
+ ret = snprintf(str+offset, str_size-offset,
+ "cannot repeat any of your previous %d passwords; ",
+ response->data.auth.policy.password_history);
+ if (ret == -1) {
+ goto failed;
+ }
+ offset += ret;
+ }
+
+ if (response->data.auth.policy.password_properties & DOMAIN_PASSWORD_COMPLEX) {
+ ret = snprintf(str+offset, str_size-offset,
+ "must contain capitals, numerals or punctuation; "
+ "and cannot contain your account or full name; ");
+ if (ret == -1) {
+ goto failed;
+ }
+ offset += ret;
+ }
+
+ ret = snprintf(str+offset, str_size-offset,
+ "Please type a different password. "
+ "Type a password which meets these requirements in both text boxes.");
+ if (ret == -1) {
+ goto failed;
+ }
+
+ return str;
+
+ failed:
+ SAFE_FREE(str);
+ return NULL;
+}
+
/* 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,
+ const int warn_pwd_expire,
+ struct winbindd_response *p_response,
+ time_t *pwd_last_set,
+ char **user_ret)
{
struct winbindd_request request;
struct winbindd_response response;
+ int ret;
+ BOOL already_expired = False;
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);
+ sizeof(request.data.auth.user)-1);
strncpy(request.data.auth.pass, pass,
- sizeof(request.data.auth.pass)-1);
+ sizeof(request.data.auth.pass)-1);
- if (member == NULL )
- return pam_winbind_request_log(WINBINDD_PAM_AUTH, &request, &response, ctrl, user);
+ request.data.auth.krb5_cc_type[0] = '\0';
+ request.data.auth.uid = -1;
+
+ request.flags = WBFLAG_PAM_INFO3_TEXT | WBFLAG_PAM_CONTACT_TRUSTDOM;
- /* lookup name? */
- if (!strncmp("S-", member, 2) == 0) {
-
- struct winbindd_request sid_request;
- struct winbindd_response sid_response;
+ if (ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
+ struct passwd *pwd = NULL;
- ZERO_STRUCT(sid_request);
- ZERO_STRUCT(sid_response);
+ pwd = getpwnam(user);
+ if (pwd == NULL) {
+ return PAM_USER_UNKNOWN;
+ }
+ request.data.auth.uid = pwd->pw_uid;
+ }
- if (ctrl & WINBIND_DEBUG_ARG)
- _pam_log(LOG_DEBUG, "no sid given, looking up: %s\n", member);
+ if (ctrl & WINBIND_KRB5_AUTH) {
- /* fortunatly winbindd can handle non-separated names */
- strcpy(sid_request.data.name.name, member);
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG, "enabling krb5 login flag\n");
+
+ request.flags |= WBFLAG_PAM_KRB5 | WBFLAG_PAM_FALLBACK_AFTER_KRB5;
+ }
+
+ 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 (pam_winbind_request_log(WINBINDD_LOOKUPNAME, &sid_request, &sid_response, ctrl, user)) {
- _pam_log(LOG_INFO, "could not lookup name: %s\n", member);
+ 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) {
+
+ if (!winbind_name_list_to_sid_string_list(pamh, ctrl, user, member,
+ request.data.auth.require_membership_of_sid,
+ sizeof(request.data.auth.require_membership_of_sid))) {
+
+ _pam_log_debug(pamh, ctrl, LOG_ERR, "failed to serialize membership of sid \"%s\"\n", member);
return PAM_AUTH_ERR;
}
+ }
- member = sid_response.data.sid.sid;
+ 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 (p_response) {
+ /* We want to process the response in the caller. */
+ *p_response = response;
+ return ret;
+ }
+
+ if (ret) {
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PASSWORD_EXPIRED");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PASSWORD_MUST_CHANGE");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_INVALID_WORKSTATION");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_INVALID_LOGON_HOURS");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCOUNT_EXPIRED");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCOUNT_DISABLED");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCOUNT_LOCKED_OUT");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NO_LOGON_SERVERS");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_WRONG_PASSWORD");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCESS_DENIED");
+ }
+
+ if (ret == PAM_SUCCESS) {
+
+ /* warn a user if the password is about to expire soon */
+ _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 "
+ "(Password was last set: %lld, the policy says "
+ "it should expire here %lld (now it's: %lu))\n",
+ response.data.auth.info3.pass_last_set_time,
+ response.data.auth.info3.pass_last_set_time +
+ response.data.auth.policy.expire,
+ time(NULL));
+
+ return PAM_AUTHTOK_EXPIRED;
+ }
+
+ /* inform about logon type */
+ _pam_warn_logon_type(pamh, ctrl, user, response.data.auth.info3.user_flgs);
+
+ /* inform about krb5 failures */
+ _pam_warn_krb5_failure(pamh, ctrl, user, response.data.auth.info3.user_flgs);
+
+ /* set some info3 info for other modules in the stack */
+ _pam_set_data_info3(pamh, ctrl, &response);
+
+ /* put krb5ccname into env */
+ _pam_setup_krb5_env(pamh, ctrl, response.data.auth.krb5ccname);
+
+ /* 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;
+ }
}
- strncpy(request.data.auth.require_membership_of_sid, member,
- sizeof(request.data.auth.require_membership_of_sid)-1);
-
- return pam_winbind_request_log(WINBINDD_PAM_AUTH, &request, &response, ctrl, user);
+ 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,
+ 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;
+ 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 | 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, ctrl, response, "NT_STATUS_BACKUP_CONTROLLER");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NO_LOGON_SERVERS");
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCESS_DENIED");
+
+ /* TODO: tell the min pwd length ? */
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PWD_TOO_SHORT");
+
+ /* TODO: tell the minage ? */
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PWD_TOO_RECENT");
+
+ /* TODO: tell the history length ? */
+ PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PWD_HISTORY_CONFLICT");
+
+ if (!strcasecmp(response.data.auth.nt_status_string, "NT_STATUS_PASSWORD_RESTRICTION")) {
+
+ char *pwd_restriction_string = NULL;
+
+ /* 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, ctrl, "NT_STATUS_PWD_TOO_RECENT");
+ }
+ break;
+ case REJECT_REASON_TOO_SHORT:
+ PAM_WB_REMARK_DIRECT(pamh, ctrl, "NT_STATUS_PWD_TOO_SHORT");
+ break;
+ case REJECT_REASON_IN_HISTORY:
+ PAM_WB_REMARK_DIRECT(pamh, ctrl, "NT_STATUS_PWD_HISTORY_CONFLICT");
+ break;
+ case REJECT_REASON_NOT_COMPLEX:
+ _make_remark(pamh, ctrl, 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;
+ }
+
+ pwd_restriction_string = _pam_compose_pwd_restriction_string(&response);
+ if (pwd_restriction_string) {
+ _make_remark(pamh, ctrl, PAM_ERROR_MSG, pwd_restriction_string);
+ SAFE_FREE(pwd_restriction_string);
+ }
+ }
+
+ return ret;
}
/*
* 0 = OK
* -1 = System error
*/
-static int valid_user(const char *user)
+static int valid_user(pam_handle_t *pamh, int ctrl, const char *user)
{
- 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;
+ }
+
+ 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;
+ _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;
const char *item;
char *token;
+ _pam_log(pamh, ctrl, LOG_DEBUG, "getting password (0x%08x)", ctrl);
+
/*
* make sure nothing inappropriate gets returned
*/
*/
if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) || on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
- retval = pam_get_item(pamh, authtok_flag, (const void **) &item);
+ retval = _pam_get_item(pamh, authtok_flag, &item);
if (retval != PAM_SUCCESS) {
/* very strange. */
- _pam_log(LOG_ALERT,
+ _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;
+ _pam_log(pamh, ctrl, LOG_DEBUG,
+ "pam_get_item returned a password");
return PAM_SUCCESS;
} else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
/* prepare to converse */
- if (comment != NULL) {
+ if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
pmsg[0] = &msg[0];
msg[0].msg_style = PAM_TEXT_INFO;
- msg[0].msg = comment;
+ 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 = prompt1;
+ 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 = prompt2;
+ msg[i++].msg = CONST_DISCARD(char *, prompt2);
++replies;
}
/* so call the conversation expecting i responses */
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);
+ _make_remark(pamh, ctrl, PAM_ERROR_MSG, MISTYPED_PASS);
}
}
} else {
- _pam_log(LOG_NOTICE
- ,"could not recover authentication token");
+ _pam_log(pamh, ctrl, LOG_NOTICE, "could not recover authentication token");
+ retval = PAM_AUTHTOK_RECOVER_ERR;
}
}
}
if (retval != PAM_SUCCESS) {
- if (on(WINBIND_DEBUG_ARG, ctrl))
- _pam_log(LOG_DEBUG,
+ _pam_log_debug(pamh, 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, &item)) != PAM_SUCCESS) {
- _pam_log(LOG_CRIT, "error manipulating password");
+ _pam_log(pamh, ctrl, LOG_CRIT, "error manipulating password");
return retval;
}
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;
+ 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;
+
+ if ( (p = strchr( argv[i], '=' )) == NULL) {
+ _pam_log(pamh, ctrl, LOG_INFO, "no \"=\" delimiter for \"%s\" found\n", item);
+ goto out;
+ }
+ _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:
+ 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);
+}
+
+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);
+}
+
+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)
{
- 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 warn_pwd_expire;
+ int retval = PAM_AUTH_ERR;
+ dictionary *d = NULL;
+ char *username_ret = NULL;
+ char *new_authtok_required = NULL;
+ char *real_username = NULL;
+
+ /* parse arguments */
+ int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
+ if (ctrl == -1) {
+ retval = PAM_SYSTEM_ERR;
+ goto out;
+ }
+
+ _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", pamh, ctrl, 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;
+ }
+
+#if defined(AIX)
+ /* Decode the user name since AIX does not support logn user
+ names by default. The name is encoded as _#uid. */
+
+ if ( username[0] == '_' ) {
+ uid_t id = atoi( &username[1] );
+ struct passwd *pw = NULL;
+
+ if ( (id!=0) && ((pw = getpwuid( id )) != NULL) ) {
+ real_username = strdup( pw->pw_name );
+ }
+ }
+#endif
+
+ if ( !real_username ) {
+ /* Just making a copy of the username we got from PAM */
+ if ( (real_username = strdup( username )) == NULL ) {
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG,
+ "memory allocation failure when copying 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(LOG_INFO, "Verify user `%s' with password `%s'",
- username, password);
+ _pam_log_debug(pamh, ctrl, LOG_INFO, "Verify user '%s' with password '%s'",
+ real_username, password);
#else
- _pam_log(LOG_INFO, "Verify user `%s'", username);
+ _pam_log_debug(pamh, ctrl, LOG_INFO, "Verify user '%s'", real_username);
#endif
- }
- if (ctrl & WINBIND_REQUIRED_MEMBERSHIP) {
-
- for ( i=0; i<argc; i++ ) {
+ member = get_member_from_config(pamh, argc, argv, ctrl, d);
- if ((strncmp(argv[i], "require_membership_of", strlen("require_membership_of")) == 0) ||
- (strncmp(argv[i], "require-membership-of", strlen("require-membership-of")) == 0)) {
+ cctype = get_krb5_cc_type_from_config(pamh, argc, argv, ctrl, d);
- char *p;
- char *parm = strdup(argv[i]);
+ warn_pwd_expire = get_warn_pwd_expire_from_config(pamh, argc, argv,
+ ctrl, d);
- if ( (p = strchr( parm, '=' )) == NULL) {
- _pam_log(LOG_INFO, "no \"=\" delimiter for \"require_membership_of\" found\n");
- break;
- }
+ /* Now use the username to look up password */
+ retval = winbind_auth_request(pamh, ctrl, username, password, member,
+ cctype, warn_pwd_expire, NULL, NULL,
+ &username_ret);
- member = strdup(p+1);
- }
- }
- }
+ if (retval == PAM_NEW_AUTHTOK_REQD ||
+ retval == PAM_AUTHTOK_EXPIRED) {
- /* Now use the username to look up password */
- retval = winbind_auth_request(username, password, member, ctrl);
- if (retval == PAM_NEW_AUTHTOK_REQD ||
- retval == PAM_AUTHTOK_EXPIRED) {
-
- char *buf;
-
- if (!asprintf(&buf, "%d", retval)) {
- return PAM_BUF_ERR;
+ char *new_authtok_required_during_auth = NULL;
+
+ if (!asprintf(&new_authtok_required, "%d", retval)) {
+ retval = PAM_BUF_ERR;
+ goto out;
+ }
+
+ pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, new_authtok_required, _pam_winbind_cleanup_func);
+
+ retval = PAM_SUCCESS;
+
+ if (!asprintf(&new_authtok_required_during_auth, "%d", True)) {
+ retval = PAM_BUF_ERR;
+ goto out;
+ }
+
+ pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
+ new_authtok_required_during_auth, _pam_winbind_cleanup_func);
+
+ goto out;
}
- pam_set_data( pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, (void *)buf, _pam_winbind_cleanup_func);
+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);
+ }
- return PAM_SUCCESS;
- }
-
- return retval;
+ if ( real_username ) {
+ free( real_username );
+ }
+
+ if (d) {
+ iniparser_freedict(d);
+ }
+
+ if (!new_authtok_required) {
+ pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
+ }
+
+ if (retval != PAM_SUCCESS) {
+ _pam_free_data_info3(pamh);
+ }
+
+ _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", pamh, ctrl, retval);
+
+ return retval;
}
PAM_EXTERN
int pam_sm_setcred(pam_handle_t *pamh, int flags,
int argc, const char **argv)
{
- return PAM_SUCCESS;
+ int ret = PAM_SYSTEM_ERR;
+ dictionary *d = NULL;
+
+ /* parse arguments */
+ int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
+ if (ctrl == -1) {
+ ret = PAM_SYSTEM_ERR;
+ goto out;
+ }
+
+ _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", pamh, ctrl, flags);
+
+ switch (flags & ~PAM_SILENT) {
+
+ case PAM_DELETE_CRED:
+ ret = pam_sm_close_session(pamh, flags, argc, argv);
+ break;
+ case PAM_REFRESH_CRED:
+ _pam_log_debug(pamh, ctrl, LOG_WARNING, "PAM_REFRESH_CRED not implemented");
+ ret = PAM_SUCCESS;
+ break;
+ case PAM_REINITIALIZE_CRED:
+ _pam_log_debug(pamh, ctrl, LOG_WARNING, "PAM_REINITIALIZE_CRED not implemented");
+ ret = PAM_SUCCESS;
+ break;
+ case PAM_ESTABLISH_CRED:
+ _pam_log_debug(pamh, ctrl, LOG_WARNING, "PAM_ESTABLISH_CRED not implemented");
+ ret = PAM_SUCCESS;
+ break;
+ default:
+ ret = PAM_SYSTEM_ERR;
+ break;
+ }
+
+ out:
+ if (d) {
+ iniparser_freedict(d);
+ }
+
+ _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", pamh, ctrl, ret);
+
+ return ret;
}
/*
int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
int argc, const char **argv)
{
- const char *username;
- void *tmp = NULL;
+ const char *username;
+ int ret = PAM_USER_UNKNOWN;
+ void *tmp = NULL;
+ dictionary *d = NULL;
+
+ /* parse arguments */
+ int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
+ if (ctrl == -1) {
+ return PAM_SYSTEM_ERR;
+ }
- int retval = PAM_USER_UNKNOWN;
+ _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", pamh, ctrl, flags);
- /* 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;
- }
+ /* Get the username */
+ ret = pam_get_user(pamh, &username, NULL);
+ if ((ret != PAM_SUCCESS) || (!username)) {
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG,"can not get the username");
+ ret = PAM_SERVICE_ERR;
+ goto out;
+ }
- /* Verify the username */
- retval = valid_user(username);
- switch (retval) {
+ /* Verify the username */
+ ret = valid_user(pamh, ctrl, username);
+ switch (ret) {
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 */
+ ret = PAM_SERVICE_ERR;
+ goto out;
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(pamh, ctrl, LOG_NOTICE, "user '%s' not found", username);
+ if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
+ ret = PAM_IGNORE;
+ goto out;
+ }
+ ret = PAM_USER_UNKNOWN;
+ goto out;
case 0:
- 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;
+ pam_get_data( pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, (const void **)&tmp);
+ if (tmp != NULL) {
+ ret = atoi((const char *)tmp);
+ switch (ret) {
+ 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 */
+ ret = PAM_NEW_AUTHTOK_REQD;
+ goto out;
+ default:
+ _pam_log(pamh, ctrl, LOG_WARNING, "pam_sm_acct_mgmt success");
+ _pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' granted access", username);
+ ret = PAM_SUCCESS;
+ goto out;
+ }
}
- }
- /* Otherwise, the authentication looked good */
- _pam_log(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);
+ ret = PAM_SUCCESS;
+ goto out;
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(pamh, ctrl, LOG_ERR, "internal module error (ret = %d, user = '%s')",
+ ret, username);
+ ret = PAM_SERVICE_ERR;
+ goto out;
+ }
+
+ /* should not be reached */
+ ret = PAM_IGNORE;
+
+ out:
+
+ if (d) {
+ iniparser_freedict(d);
+ }
+
+ _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", pamh, ctrl, ret);
+
+ return ret;
}
+
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;
+ int ret = PAM_SYSTEM_ERR;
+ dictionary *d = NULL;
+
+ /* parse arguments */
+ int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
+ if (ctrl == -1) {
+ ret = PAM_SYSTEM_ERR;
+ goto out;
+ }
+
+ _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", pamh, ctrl, flags);
+
+ ret = PAM_SUCCESS;
+
+ out:
+ if (d) {
+ iniparser_freedict(d);
+ }
+
+ _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", pamh, ctrl, ret);
+
+ return ret;
}
+
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;
+ dictionary *d = NULL;
+ 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_FUNCTION_ENTER("pam_sm_close_session", pamh, ctrl, 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_log(pamh, ctrl, LOG_ERR, "could not identify user");
+ goto out;
+ }
+
+ if (user == NULL) {
+ _pam_log(pamh, ctrl, LOG_ERR, "username was NULL!");
+ retval = PAM_USER_UNKNOWN;
+ goto out;
+ }
+
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG, "username [%s] obtained", user);
+
+ 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);
+ }
+
+ _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", pamh, ctrl, retval);
+
+ return retval;
}
+/**
+ * evaluate whether we need to re-authenticate with kerberos after a password change
+ *
+ * @param pamh PAM handle
+ * @param ctrl PAM winbind options.
+ * @param user The username
+ *
+ * @return boolean Returns True if required, False if not.
+ */
+
+static BOOL _pam_require_krb5_auth_after_chauthtok(pam_handle_t *pamh, int ctrl, const char *user)
+{
+
+ /* Make sure that we only do this if
+ * a) the chauthtok got initiated during a logon attempt (authenticate->acct_mgmt->chauthtok)
+ * b) any later password change via the "passwd" command if done by the user itself
+ */
+
+ char *new_authtok_reqd_during_auth = NULL;
+ struct passwd *pwd = NULL;
+
+ if (!(ctrl & WINBIND_KRB5_AUTH)) {
+ return False;
+ }
+
+ _pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH, &new_authtok_reqd_during_auth);
+ pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH, NULL, NULL);
+
+ if (new_authtok_reqd_during_auth) {
+ return True;
+ }
+
+ pwd = getpwnam(user);
+ if (!pwd) {
+ return False;
+ }
+
+ if (getuid() == pwd->pw_uid) {
+ return True;
+ }
+
+ return False;
+}
-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);
+ int ret;
+ 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;
int retry = 0;
+ dictionary *d = NULL;
+ char *username_ret = NULL;
+ struct winbindd_response response;
+
+ ZERO_STRUCT(response);
+
+ ctrl = _pam_parse(pamh, flags, argc, argv, &d);
+ if (ctrl == -1) {
+ ret = PAM_SYSTEM_ERR;
+ goto out;
+ }
+
+ _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", pamh, ctrl, 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(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",
- user);
- } else {
- if (on(WINBIND_DEBUG_ARG, ctrl))
- _pam_log(LOG_DEBUG,
- "password - could not identify user");
- return retval;
+ ret = pam_get_user(pamh, &user, "Username: ");
+ if (ret) {
+ _pam_log(pamh, ctrl, LOG_ERR,
+ "password - could not identify user");
+ goto out;
}
+ if (user == NULL) {
+ _pam_log(pamh, ctrl, LOG_ERR, "username was NULL!");
+ ret = PAM_USER_UNKNOWN;
+ goto out;
+ }
+
+ _pam_log_debug(pamh, ctrl, LOG_DEBUG, "username [%s] obtained", user);
+
+ /* check if this is really a user in winbindd, not only in NSS */
+ ret = valid_user(pamh, ctrl, user);
+ switch (ret) {
+ case 1:
+ ret = PAM_USER_UNKNOWN;
+ goto out;
+ case -1:
+ ret = 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(LOG_CRIT,
- "password - out of memory");
- return PAM_BUF_ERR;
+ _pam_log(pamh, ctrl, LOG_CRIT, "password - out of memory");
+ ret = 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);
- free(Announce);
-
- if (retval != PAM_SUCCESS) {
- _pam_log(LOG_NOTICE
- ,"password - (old) token not obtained");
- return retval;
+ ret = _winbind_read_password(pamh, lctrl,
+ Announce,
+ "(current) NT password: ",
+ NULL,
+ (const char **) &pass_old);
+ if (ret != 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(user, pass_old, member, ctrl);
-
- if (retval != PAM_ACCT_EXPIRED
- && retval != PAM_AUTHTOK_EXPIRED
- && retval != PAM_NEW_AUTHTOK_REQD
- && retval != PAM_SUCCESS) {
+ ret = winbind_auth_request(pamh, ctrl, user, pass_old,
+ NULL, NULL, 0, &response,
+ &pwdlastset_prelim, NULL);
+
+ if (ret != PAM_ACCT_EXPIRED &&
+ ret != PAM_AUTHTOK_EXPIRED &&
+ ret != PAM_NEW_AUTHTOK_REQD &&
+ ret != PAM_SUCCESS) {
pass_old = NULL;
- return retval;
+ goto out;
}
- retval = pam_set_item(pamh, PAM_OLDAUTHTOK, (const void *) pass_old);
+ pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET, (void *)pwdlastset_prelim, NULL);
+
+ ret = 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");
+ if (ret != 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
- ,(const void **) &pass_old);
+ ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
- if (retval != PAM_SUCCESS) {
- _pam_log(LOG_NOTICE, "user not authenticated");
- return retval;
+ if (ret != PAM_SUCCESS) {
+ _pam_log(pamh, ctrl, LOG_NOTICE, "user not authenticated");
+ goto out;
}
- lctrl = ctrl;
+ lctrl = ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
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)) {
+ ret = PAM_AUTHTOK_ERR;
+ while ((ret != 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);
+ ret = _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");
- }
+ if (ret != PAM_SUCCESS) {
+ _pam_log_debug(pamh, ctrl, LOG_ALERT
+ ,"password - new password not obtained");
pass_old = NULL;/* tidy up */
- return retval;
+ goto out;
}
/*
* 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);
+
+ ret = winbind_chauthtok_request(pamh, ctrl, user, pass_old, pass_new, pwdlastset_update);
+ if (ret) {
+ _pam_overwrite(pass_new);
+ _pam_overwrite(pass_old);
+ pass_old = pass_new = NULL;
+ goto out;
+ }
+
+ if (_pam_require_krb5_auth_after_chauthtok(pamh, ctrl, user)) {
- retval = winbind_chauthtok_request(user, pass_old, pass_new, ctrl);
- _pam_overwrite(pass_new);
- _pam_overwrite(pass_old);
- pass_old = pass_new = NULL;
+ 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, 0, &response,
+ NULL, &username_ret);
+ _pam_overwrite(pass_new);
+ _pam_overwrite(pass_old);
+ pass_old = pass_new = NULL;
+
+ if (ret == PAM_SUCCESS) {
+
+ /* warn a user if the password is about to expire soon */
+ _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);
+
+ /* put krb5ccname into env */
+ _pam_setup_krb5_env(pamh, ctrl, response.data.auth.krb5ccname);
+
+ 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);
+ }
+ }
+
+ goto out;
+ }
} else {
- retval = PAM_SERVICE_ERR;
+ ret = PAM_SERVICE_ERR;
+ }
+
+out:
+ if (d) {
+ iniparser_freedict(d);
}
+
+ /* Deal with offline errors. */
+ PAM_WB_REMARK_CHECK_RESPONSE(pamh, ctrl, response, "NT_STATUS_NO_LOGON_SERVERS");
+ PAM_WB_REMARK_CHECK_RESPONSE(pamh, ctrl, response, "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
+ PAM_WB_REMARK_CHECK_RESPONSE(pamh, ctrl, response, "NT_STATUS_ACCESS_DENIED");
+
+ _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", pamh, ctrl, ret);
- return retval;
+ return ret;
}
#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
+ 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) Jan Rêkorajski 1999.
+ * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2007
+ * Copyright (c) Jan Rêkorajski 1999.
* Copyright (c) Andrew G. Morgan 1996-8.
* Copyright (c) Alex O. Yuriev, 1996.
* Copyright (c) Cristian Gafton 1996.
git.samba.org / sfrench / samba-autobuild / .git / blobdiff