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-rw-r--r--nsswitch/pam_winbind.c3204
1 files changed, 3204 insertions, 0 deletions
diff --git a/nsswitch/pam_winbind.c b/nsswitch/pam_winbind.c
new file mode 100644
index 0000000000..d049bdb1e7
--- /dev/null
+++ b/nsswitch/pam_winbind.c
@@ -0,0 +1,3204 @@
+/* pam_winbind module
+
+ Copyright Andrew Tridgell <tridge@samba.org> 2000
+ Copyright Tim Potter <tpot@samba.org> 2000
+ Copyright Andrew Bartlett <abartlet@samba.org> 2002
+ Copyright Guenther Deschner <gd@samba.org> 2005-2008
+
+ largely based on pam_userdb by Cristian Gafton <gafton@redhat.com> also
+ contains large slabs of code from pam_unix by Elliot Lee
+ <sopwith@redhat.com> (see copyright below for full details)
+*/
+
+#include "pam_winbind.h"
+
+static int wbc_error_to_pam_error(wbcErr status)
+{
+ switch (status) {
+ case WBC_ERR_SUCCESS:
+ return PAM_SUCCESS;
+ case WBC_ERR_NOT_IMPLEMENTED:
+ return PAM_SERVICE_ERR;
+ case WBC_ERR_UNKNOWN_FAILURE:
+ break;
+ case WBC_ERR_NO_MEMORY:
+ return PAM_BUF_ERR;
+ case WBC_ERR_INVALID_SID:
+ case WBC_ERR_INVALID_PARAM:
+ break;
+ case WBC_ERR_WINBIND_NOT_AVAILABLE:
+ return PAM_AUTHINFO_UNAVAIL;
+ case WBC_ERR_DOMAIN_NOT_FOUND:
+ return PAM_AUTHINFO_UNAVAIL;
+ case WBC_ERR_INVALID_RESPONSE:
+ return PAM_BUF_ERR;
+ case WBC_ERR_NSS_ERROR:
+ return PAM_USER_UNKNOWN;
+ case WBC_ERR_AUTH_ERROR:
+ return PAM_AUTH_ERR;
+ case WBC_ERR_UNKNOWN_USER:
+ return PAM_USER_UNKNOWN;
+ case WBC_ERR_UNKNOWN_GROUP:
+ return PAM_USER_UNKNOWN;
+ case WBC_ERR_PWD_CHANGE_FAILED:
+ break;
+ }
+
+ /* be paranoid */
+ return PAM_AUTH_ERR;
+}
+
+static const char *_pam_error_code_str(int err)
+{
+ switch (err) {
+ case PAM_SUCCESS:
+ return "PAM_SUCCESS";
+ case PAM_OPEN_ERR:
+ return "PAM_OPEN_ERR";
+ case PAM_SYMBOL_ERR:
+ return "PAM_SYMBOL_ERR";
+ case PAM_SERVICE_ERR:
+ return "PAM_SERVICE_ERR";
+ case PAM_SYSTEM_ERR:
+ return "PAM_SYSTEM_ERR";
+ case PAM_BUF_ERR:
+ return "PAM_BUF_ERR";
+ case PAM_PERM_DENIED:
+ return "PAM_PERM_DENIED";
+ case PAM_AUTH_ERR:
+ return "PAM_AUTH_ERR";
+ case PAM_CRED_INSUFFICIENT:
+ return "PAM_CRED_INSUFFICIENT";
+ case PAM_AUTHINFO_UNAVAIL:
+ return "PAM_AUTHINFO_UNAVAIL";
+ case PAM_USER_UNKNOWN:
+ return "PAM_USER_UNKNOWN";
+ case PAM_MAXTRIES:
+ return "PAM_MAXTRIES";
+ case PAM_NEW_AUTHTOK_REQD:
+ return "PAM_NEW_AUTHTOK_REQD";
+ case PAM_ACCT_EXPIRED:
+ return "PAM_ACCT_EXPIRED";
+ case PAM_SESSION_ERR:
+ return "PAM_SESSION_ERR";
+ case PAM_CRED_UNAVAIL:
+ return "PAM_CRED_UNAVAIL";
+ case PAM_CRED_EXPIRED:
+ return "PAM_CRED_EXPIRED";
+ case PAM_CRED_ERR:
+ return "PAM_CRED_ERR";
+ case PAM_NO_MODULE_DATA:
+ return "PAM_NO_MODULE_DATA";
+ case PAM_CONV_ERR:
+ return "PAM_CONV_ERR";
+ case PAM_AUTHTOK_ERR:
+ return "PAM_AUTHTOK_ERR";
+ case PAM_AUTHTOK_RECOVER_ERR:
+ return "PAM_AUTHTOK_RECOVER_ERR";
+ case PAM_AUTHTOK_LOCK_BUSY:
+ return "PAM_AUTHTOK_LOCK_BUSY";
+ case PAM_AUTHTOK_DISABLE_AGING:
+ return "PAM_AUTHTOK_DISABLE_AGING";
+ case PAM_TRY_AGAIN:
+ return "PAM_TRY_AGAIN";
+ case PAM_IGNORE:
+ return "PAM_IGNORE";
+ case PAM_ABORT:
+ return "PAM_ABORT";
+ case PAM_AUTHTOK_EXPIRED:
+ return "PAM_AUTHTOK_EXPIRED";
+#ifdef PAM_MODULE_UNKNOWN
+ case PAM_MODULE_UNKNOWN:
+ return "PAM_MODULE_UNKNOWN";
+#endif
+#ifdef PAM_BAD_ITEM
+ case PAM_BAD_ITEM:
+ return "PAM_BAD_ITEM";
+#endif
+#ifdef PAM_CONV_AGAIN
+ case PAM_CONV_AGAIN:
+ return "PAM_CONV_AGAIN";
+#endif
+#ifdef PAM_INCOMPLETE
+ case PAM_INCOMPLETE:
+ return "PAM_INCOMPLETE";
+#endif
+ default:
+ return NULL;
+ }
+}
+
+#define _PAM_LOG_FUNCTION_ENTER(function, ctx) \
+ do { \
+ _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] ENTER: " \
+ function " (flags: 0x%04x)", ctx->pamh, ctx->flags); \
+ _pam_log_state(ctx); \
+ } while (0)
+
+#define _PAM_LOG_FUNCTION_LEAVE(function, ctx, retval) \
+ do { \
+ _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] LEAVE: " \
+ function " returning %d (%s)", ctx->pamh, retval, \
+ _pam_error_code_str(retval)); \
+ _pam_log_state(ctx); \
+ } while (0)
+
+/* data tokens */
+
+#define MAX_PASSWD_TRIES 3
+
+#ifdef HAVE_GETTEXT
+static char initialized = 0;
+
+static inline void textdomain_init(void);
+static inline void textdomain_init(void)
+{
+ if (!initialized) {
+ bindtextdomain(MODULE_NAME, dyn_LOCALEDIR);
+ initialized = 1;
+ }
+ return;
+}
+#endif
+
+
+/*
+ * 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 */
+
+#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 = (char *)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(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
+static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
+{
+ va_list args;
+
+ if (_pam_log_is_silent(r->ctrl)) {
+ return;
+ }
+
+ va_start(args, format);
+ _pam_log_int(r->pamh, err, format, args);
+ va_end(args);
+}
+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(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
+static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
+{
+ va_list args;
+
+ if (!_pam_log_is_debug_enabled(r->ctrl)) {
+ return;
+ }
+
+ va_start(args, format);
+ _pam_log_int(r->pamh, err, format, args);
+ va_end(args);
+}
+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);
+ _pam_log_int(pamh, err, format, args);
+ va_end(args);
+}
+
+static void _pam_log_state_datum(struct pwb_context *ctx,
+ int item_type,
+ const char *key,
+ int is_string)
+{
+ const void *data = NULL;
+ if (item_type != 0) {
+ pam_get_item(ctx->pamh, item_type, &data);
+ } else {
+ pam_get_data(ctx->pamh, key, &data);
+ }
+ if (data != NULL) {
+ const char *type = (item_type != 0) ? "ITEM" : "DATA";
+ if (is_string != 0) {
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
+ ctx->pamh, type, key, (const char *)data,
+ data);
+ } else {
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "[pamh: %p] STATE: %s(%s) = %p",
+ ctx->pamh, type, key, data);
+ }
+ }
+}
+
+#define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
+ _pam_log_state_datum(ctx, 0, module_data_name, 0)
+
+#define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
+ _pam_log_state_datum(ctx, 0, module_data_name, 1)
+
+#define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
+ _pam_log_state_datum(ctx, item_type, #item_type, 0)
+
+#define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
+ _pam_log_state_datum(ctx, 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(ctx, item_type) \
+ _pam_log_state_datum(ctx, item_type, #item_type, \
+ _LOG_PASSWORD_AS_STRING)
+
+static void _pam_log_state(struct pwb_context *ctx)
+{
+ if (!_pam_log_is_debug_state_enabled(ctx->ctrl)) {
+ return;
+ }
+
+ _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
+ _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
+ _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
+ _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
+ _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
+ _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
+ _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
+ _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
+ _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
+#ifdef PAM_FAIL_DELAY
+ _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_FAIL_DELAY);
+#endif
+#ifdef PAM_REPOSITORY
+ _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
+#endif
+
+ _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
+ _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
+ _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
+ _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
+ _PAM_LOG_STATE_DATA_STRING(ctx,
+ PAM_WINBIND_NEW_AUTHTOK_REQD);
+ /* Use atoi to get PAM result code */
+ _PAM_LOG_STATE_DATA_STRING(ctx,
+ PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
+ _PAM_LOG_STATE_DATA_POINTER(ctx, 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;
+ }
+
+ if (iniparser_getint(d, "global:warn_pwd_expire", 0)) {
+ ctrl |= WINBIND_WARN_PWD_EXPIRE;
+ }
+
+ if (iniparser_getboolean(d, "global:mkhomedir", false)) {
+ ctrl |= WINBIND_MKHOMEDIR;
+ }
+
+config_from_pam:
+ /* step through arguments */
+ for (i=argc,v=argv; i-- > 0; ++v) {
+
+ /* generic options */
+ if (!strcmp(*v,"debug"))
+ ctrl |= WINBIND_DEBUG_ARG;
+ else if (!strcasecmp(*v, "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(*v, "use_first_pass"))
+ ctrl |= WINBIND_USE_FIRST_PASS_ARG;
+ else if (!strcasecmp(*v, "try_first_pass"))
+ ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
+ else if (!strcasecmp(*v, "unknown_ok"))
+ ctrl |= WINBIND_UNKNOWN_OK_ARG;
+ else if (!strncasecmp(*v, "require_membership_of",
+ strlen("require_membership_of")))
+ ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
+ else if (!strncasecmp(*v, "require-membership-of",
+ strlen("require-membership-of")))
+ ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
+ else if (!strcasecmp(*v, "krb5_auth"))
+ ctrl |= WINBIND_KRB5_AUTH;
+ else if (!strncasecmp(*v, "krb5_ccache_type",
+ strlen("krb5_ccache_type")))
+ ctrl |= WINBIND_KRB5_CCACHE_TYPE;
+ else if (!strcasecmp(*v, "cached_login"))
+ ctrl |= WINBIND_CACHED_LOGIN;
+ else if (!strcasecmp(*v, "mkhomedir"))
+ ctrl |= WINBIND_MKHOMEDIR;
+ else {
+ __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 int _pam_winbind_free_context(struct pwb_context *ctx)
+{
+ if (!ctx) {
+ return 0;
+ }
+
+ if (ctx->dict) {
+ iniparser_freedict(ctx->dict);
+ }
+
+ return 0;
+}
+
+static int _pam_winbind_init_context(pam_handle_t *pamh,
+ int flags,
+ int argc,
+ const char **argv,
+ struct pwb_context **ctx_p)
+{
+ struct pwb_context *r = NULL;
+
+#ifdef HAVE_GETTEXT
+ textdomain_init();
+#endif
+
+ r = TALLOC_ZERO_P(NULL, struct pwb_context);
+ if (!r) {
+ return PAM_BUF_ERR;
+ }
+
+ talloc_set_destructor(r, _pam_winbind_free_context);
+
+ r->pamh = pamh;
+ r->flags = flags;
+ r->argc = argc;
+ r->argv = argv;
+ r->ctrl = _pam_parse(pamh, flags, argc, argv, &r->dict);
+ if (r->ctrl == -1) {
+ TALLOC_FREE(r);
+ return PAM_SYSTEM_ERR;
+ }
+
+ *ctx_p = r;
+
+ return PAM_SUCCESS;
+}
+
+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: %p] CLEAN: cleaning up PAM data %p "
+ "(error_status = %d)", pamh, data,
+ error_status);
+ }
+ TALLOC_FREE(data);
+}
+
+
+static const struct ntstatus_errors {
+ const char *ntstatus_string;
+ const char *error_string;
+} ntstatus_errors[] = {
+ {"NT_STATUS_OK",
+ N_("Success")},
+ {"NT_STATUS_BACKUP_CONTROLLER",
+ N_("No primary Domain Controler available")},
+ {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
+ N_("No domain controllers found")},
+ {"NT_STATUS_NO_LOGON_SERVERS",
+ N_("No logon servers")},
+ {"NT_STATUS_PWD_TOO_SHORT",
+ N_("Password too short")},
+ {"NT_STATUS_PWD_TOO_RECENT",
+ N_("The password of this user is too recent to change")},
+ {"NT_STATUS_PWD_HISTORY_CONFLICT",
+ N_("Password is already in password history")},
+ {"NT_STATUS_PASSWORD_EXPIRED",
+ N_("Your password has expired")},
+ {"NT_STATUS_PASSWORD_MUST_CHANGE",
+ N_("You need to change your password now")},
+ {"NT_STATUS_INVALID_WORKSTATION",
+ N_("You are not allowed to logon from this workstation")},
+ {"NT_STATUS_INVALID_LOGON_HOURS",
+ N_("You are not allowed to logon at this time")},
+ {"NT_STATUS_ACCOUNT_EXPIRED",
+ N_("Your account has expired. "
+ "Please contact your System administrator")}, /* SCNR */
+ {"NT_STATUS_ACCOUNT_DISABLED",
+ N_("Your account is disabled. "
+ "Please contact your System administrator")}, /* SCNR */
+ {"NT_STATUS_ACCOUNT_LOCKED_OUT",
+ N_("Your account has been locked. "
+ "Please contact your System administrator")}, /* SCNR */
+ {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
+ N_("Invalid Trust Account")},
+ {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
+ N_("Invalid Trust Account")},
+ {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
+ N_("Invalid Trust Account")},
+ {"NT_STATUS_ACCESS_DENIED",
+ N_("Access is denied")},
+ {NULL, NULL}
+};
+
+static const char *_get_ntstatus_error_string(const char *nt_status_string)
+{
+ int i;
+ for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
+ if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
+ nt_status_string)) {
+ return _(ntstatus_errors[i].error_string);
+ }
+ }
+ return NULL;
+}
+
+/* --- authentication management functions --- */
+
+/* Attempt a conversation */
+
+static int converse(const pam_handle_t *pamh,
+ int nargs,
+ struct pam_message **message,
+ struct pam_response **response)
+{
+ int retval;
+ struct pam_conv *conv;
+
+ retval = _pam_get_item(pamh, PAM_CONV, &conv);
+ if (retval == PAM_SUCCESS) {
+ retval = conv->conv(nargs,
+ (const struct pam_message **)message,
+ response, conv->appdata_ptr);
+ }
+
+ return retval; /* propagate error status */
+}
+
+
+static int _make_remark(struct pwb_context *ctx,
+ int type,
+ const char *text)
+{
+ int retval = PAM_SUCCESS;
+
+ struct pam_message *pmsg[1], msg[1];
+ struct pam_response *resp;
+
+ if (ctx->flags & WINBIND_SILENT) {
+ return PAM_SUCCESS;
+ }
+
+ pmsg[0] = &msg[0];
+ msg[0].msg = discard_const_p(char, text);
+ msg[0].msg_style = type;
+
+ resp = NULL;
+ retval = converse(ctx->pamh, 1, pmsg, &resp);
+
+ if (resp) {
+ _pam_drop_reply(resp, 1);
+ }
+ return retval;
+}
+
+static int _make_remark_v(struct pwb_context *ctx,
+ int type,
+ const char *format,
+ va_list args)
+{
+ char *var;
+ int ret;
+
+ ret = vasprintf(&var, format, args);
+ if (ret < 0) {
+ _pam_log(ctx, LOG_ERR, "memory allocation failure");
+ return ret;
+ }
+
+ ret = _make_remark(ctx, type, var);
+ SAFE_FREE(var);
+ return ret;
+}
+
+static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
+static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
+{
+ int ret;
+ va_list args;
+
+ va_start(args, format);
+ ret = _make_remark_v(ctx, type, format, args);
+ va_end(args);
+ return ret;
+}
+
+static int pam_winbind_request_log(struct pwb_context *ctx,
+ int retval,
+ const char *user,
+ const char *fn)
+{
+ switch (retval) {
+ case PAM_AUTH_ERR:
+ /* incorrect password */
+ _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
+ "(incorrect password or invalid membership)", user);
+ return retval;
+ case PAM_ACCT_EXPIRED:
+ /* account expired */
+ _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
+ user);
+ return retval;
+ case PAM_AUTHTOK_EXPIRED:
+ /* password expired */
+ _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
+ user);
+ return retval;
+ case PAM_NEW_AUTHTOK_REQD:
+ /* new password required */
+ _pam_log(ctx, LOG_WARNING, "user '%s' new password "
+ "required", user);
+ return retval;
+ case PAM_USER_UNKNOWN:
+ /* the user does not exist */
+ _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
+ user);
+ if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
+ return PAM_IGNORE;
+ }
+ return retval;
+ case PAM_SUCCESS:
+ /* Otherwise, the authentication looked good */
+ if (strcmp(fn, "wbcLogonUser") == 0) {
+ _pam_log(ctx, LOG_NOTICE,
+ "user '%s' granted access", user);
+ } else {
+ _pam_log(ctx, LOG_NOTICE,
+ "user '%s' OK", user);
+ }
+ return retval;
+ default:
+ /* we don't know anything about this return value */
+ _pam_log(ctx, LOG_ERR,
+ "internal module error (retval = %s(%d), user = '%s')",
+ _pam_error_code_str(retval), retval, user);
+ return retval;
+ }
+}
+
+static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
+ struct wbcAuthErrorInfo *e,
+ wbcErr status,
+ const char *username,
+ const char *fn)
+{
+ int ret = PAM_AUTH_ERR;
+
+ if (WBC_ERROR_IS_OK(status)) {
+ _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
+ fn);
+ ret = PAM_SUCCESS;
+ return pam_winbind_request_log(ctx, ret, username, fn);
+ }
+
+ if (e) {
+ if (e->pam_error != PAM_SUCCESS) {
+ _pam_log(ctx, LOG_ERR,
+ "request %s failed: %s, "
+ "PAM error: %s (%d), NTSTATUS: %s, "
+ "Error message was: %s",
+ fn,
+ wbcErrorString(status),
+ _pam_error_code_str(e->pam_error),
+ e->pam_error,
+ e->nt_string,
+ e->display_string);
+ ret = e->pam_error;
+ return pam_winbind_request_log(ctx, ret, username, fn);
+ }
+
+ _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
+
+ ret = PAM_SERVICE_ERR;
+ return pam_winbind_request_log(ctx, ret, username, fn);
+ }
+
+ ret = wbc_error_to_pam_error(status);
+ return pam_winbind_request_log(ctx, ret, username, fn);
+}
+
+
+/**
+ * send a password expiry message if required
+ *
+ * @param ctx PAM winbind context.
+ * @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(struct pwb_context *ctx,
+ 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(ctx, "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(ctx, PAM_TEXT_INFO,
+ _("Your password expires today"));
+ return true;
+ }
+
+ if (days > 0 && days < warn_pwd_expire) {
+ _make_remark_format(ctx, 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 ctx PAM winbind context.
+ * @param response The full authentication response structure.
+ * @param already_expired boolean, is the pwd already expired?
+ *
+ * @return void.
+ */
+
+static void _pam_warn_password_expiry(struct pwb_context *ctx,
+ const struct wbcAuthUserInfo *info,
+ const struct wbcUserPasswordPolicyInfo *policy,
+ int warn_pwd_expire,
+ bool *already_expired)
+{
+ time_t now = time(NULL);
+ time_t next_change = 0;
+
+ if (!info || !policy) {
+ return;
+ }
+
+ if (already_expired) {
+ *already_expired = false;
+ }
+
+ /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
+ if (info->acct_flags & WBC_ACB_PWNOEXP) {
+ return;
+ }
+
+ /* no point in sending a warning if this is a grace logon */
+ if (PAM_WB_GRACE_LOGON(info->user_flags)) {
+ return;
+ }
+
+ /* check if the info3 must change timestamp has been set */
+ next_change = info->pass_must_change_time;
+
+ if (_pam_send_password_expiry_message(ctx, 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 (policy->expire <= 0) {
+ return;
+ }
+
+ next_change = info->pass_last_set_time + policy->expire;
+
+ if (_pam_send_password_expiry_message(ctx, next_change, now,
+ warn_pwd_expire,
+ already_expired)) {
+ return;
+ }
+
+ /* no warning sent */
+}
+
+#define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
+
+/**
+ * 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.
+ */
+
+static bool safe_append_string(char *dest,
+ const char *src,
+ int dest_buffer_size)
+{
+ 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;
+}
+
+/**
+ * Convert a names into a SID string, appending it to a buffer.
+ *
+ * @param ctx PAM winbind context.
+ * @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.
+ */
+static bool winbind_name_to_sid_string(struct pwb_context *ctx,
+ const char *user,
+ const char *name,
+ char *sid_list_buffer,
+ int sid_list_buffer_size)
+{
+ const char* sid_string;
+
+ /* lookup name? */
+ if (IS_SID_STRING(name)) {
+ sid_string = name;
+ } else {
+ wbcErr wbc_status;
+ struct wbcDomainSid sid;
+ enum wbcSidType type;
+ char *sid_str;
+
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "no sid given, looking up: %s\n", name);
+
+ wbc_status = wbcLookupName("", name, &sid, &type);
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ _pam_log(ctx, LOG_INFO,
+ "could not lookup name: %s\n", name);
+ return false;
+ }
+
+ wbc_status = wbcSidToString(&sid, &sid_str);
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ return false;
+ }
+
+ wbcFreeMemory(sid_str);
+ sid_string = sid_str;
+ }
+
+ if (!safe_append_string(sid_list_buffer, sid_string,
+ sid_list_buffer_size)) {
+ return false;
+ }
+
+ return true;
+}
+
+/**
+ * Convert a list of names into a list of sids.
+ *
+ * @param ctx PAM winbind context.
+ * @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.
+ */
+static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
+ const char *user,
+ const char *name_list,
+ char *sid_list_buffer,
+ int sid_list_buffer_size)
+{
+ 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(ctx, 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(ctx, 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 ctx PAM winbind context.
+ * @param krb5ccname env variable retrieved from winbindd.
+ *
+ * @return void.
+ */
+
+static void _pam_setup_krb5_env(struct pwb_context *ctx,
+ struct wbcLogonUserInfo *info)
+{
+ char var[PATH_MAX];
+ int ret;
+ uint32_t i;
+ const char *krb5ccname = NULL;
+
+ if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
+ return;
+ }
+
+ if (!info) {
+ return;
+ }
+
+ for (i=0; i < info->num_blobs; i++) {
+ if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
+ krb5ccname = (const char *)info->blobs[i].blob.data;
+ break;
+ }
+ }
+
+ if (!krb5ccname || (strlen(krb5ccname) == 0)) {
+ return;
+ }
+
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "request returned KRB5CCNAME: %s", krb5ccname);
+
+ if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
+ return;
+ }
+
+ ret = pam_putenv(ctx->pamh, var);
+ if (ret) {
+ _pam_log(ctx, LOG_ERR,
+ "failed to set KRB5CCNAME to %s: %s",
+ var, pam_strerror(ctx->pamh, ret));
+ }
+}
+
+/**
+ * Copy unix username if available (further processed in PAM).
+ *
+ * @param ctx PAM winbind context
+ * @param user_ret A pointer that holds a pointer to a string
+ * @param unix_username A username
+ *
+ * @return void.
+ */
+
+static void _pam_setup_unix_username(struct pwb_context *ctx,
+ char **user_ret,
+ struct wbcLogonUserInfo *info)
+{
+ const char *unix_username = NULL;
+ uint32_t i;
+
+ if (!user_ret || !info) {
+ return;
+ }
+
+ for (i=0; i < info->num_blobs; i++) {
+ if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
+ unix_username = (const char *)info->blobs[i].blob.data;
+ break;
+ }
+ }
+
+ if (!unix_username || !unix_username[0]) {
+ return;
+ }
+
+ *user_ret = strdup(unix_username);
+}
+
+/**
+ * Set string into the PAM stack.
+ *
+ * @param ctx PAM winbind context.
+ * @param data_name Key name for pam_set_data.
+ * @param value String value.
+ *
+ * @return void.
+ */
+
+static void _pam_set_data_string(struct pwb_context *ctx,
+ 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(ctx->pamh, data_name, talloc_strdup(NULL, value),
+ _pam_winbind_cleanup_func);
+ if (ret) {
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "Could not set data %s: %s\n",
+ data_name, pam_strerror(ctx->pamh, ret));
+ }
+}
+
+/**
+ * Set info3 strings into the PAM stack.
+ *
+ * @param ctx PAM winbind context.
+ * @param data_name Key name for pam_set_data.
+ * @param value String value.
+ *
+ * @return void.
+ */
+
+static void _pam_set_data_info3(struct pwb_context *ctx,
+ const struct wbcAuthUserInfo *info)
+{
+ _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
+ info->home_directory);
+ _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
+ info->logon_script);
+ _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
+ info->logon_server);
+ _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
+ info->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 ctx PAM winbind context.
+ * @param username User in PAM request.
+ * @param info3_user_flgs Info3 flags containing logon type bits.
+ *
+ * @return void.
+ */
+
+static void _pam_warn_logon_type(struct pwb_context *ctx,
+ const char *username,
+ uint32_t info3_user_flgs)
+{
+ /* inform about logon type */
+ if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
+
+ _make_remark(ctx, PAM_ERROR_MSG,
+ _("Grace login. "
+ "Please change your password as soon you're "
+ "online again"));
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "User %s logged on using grace logon\n",
+ username);
+
+ } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
+
+ _make_remark(ctx, PAM_ERROR_MSG,
+ _("Domain Controller unreachable, "
+ "using cached credentials instead. "
+ "Network resources may be unavailable"));
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "User %s logged on using cached credentials\n",
+ username);
+ }
+}
+
+/**
+ * Send PAM_ERROR_MSG for krb5 errors.
+ *
+ * @param ctx PAM winbind context.
+ * @param username User in PAM request.
+ * @param info3_user_flgs Info3 flags containing logon type bits.
+ *
+ * @return void.
+ */
+
+static void _pam_warn_krb5_failure(struct pwb_context *ctx,
+ const char *username,
+ uint32_t info3_user_flgs)
+{
+ if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
+ _make_remark(ctx, 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(ctx, LOG_DEBUG,
+ "User %s: Clock skew when getting Krb5 TGT\n",
+ username);
+ }
+}
+
+static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
+ const struct wbcAuthErrorInfo *e,
+ const char *nt_status_string,
+ int *pam_error)
+{
+ const char *ntstatus = NULL;
+ const char *error_string = NULL;
+
+ if (!e || !pam_error) {
+ return false;
+ }
+
+ ntstatus = e->nt_string;
+ if (!ntstatus) {
+ return false;
+ }
+
+ if (strcasecmp(ntstatus, nt_status_string) == 0) {
+
+ error_string = _get_ntstatus_error_string(nt_status_string);
+ if (error_string) {
+ _make_remark(ctx, PAM_ERROR_MSG, error_string);
+ *pam_error = e->pam_error;
+ return true;
+ }
+
+ if (e->display_string) {
+ _make_remark(ctx, PAM_ERROR_MSG, e->display_string);
+ *pam_error = e->pam_error;
+ return true;
+ }
+
+ _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
+ *pam_error = e->pam_error;
+
+ return true;
+ }
+
+ return false;
+};
+
+/**
+ * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
+ *
+ * @param i The wbcUserPasswordPolicyInfo struct.
+ *
+ * @return string (caller needs to talloc_free).
+ */
+
+static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
+ struct wbcUserPasswordPolicyInfo *i)
+{
+ char *str = NULL;
+
+ if (!i) {
+ goto failed;
+ }
+
+ str = talloc_asprintf(ctx, _("Your password "));
+ if (!str) {
+ goto failed;
+ }
+
+ if (i->min_length_password > 0) {
+ str = talloc_asprintf_append(str,
+ _("must be at least %d characters; "),
+ i->min_length_password);
+ if (!str) {
+ goto failed;
+ }
+ }
+
+ if (i->password_history > 0) {
+ str = talloc_asprintf_append(str,
+ _("cannot repeat any of your previous %d "
+ "passwords; "),
+ i->password_history);
+ if (!str) {
+ goto failed;
+ }
+ }
+
+ if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
+ str = talloc_asprintf_append(str,
+ _("must contain capitals, numerals "
+ "or punctuation; "
+ "and cannot contain your account "
+ "or full name; "));
+ if (!str) {
+ goto failed;
+ }
+ }
+
+ str = talloc_asprintf_append(str,
+ _("Please type a different password. "
+ "Type a password which meets these requirements in "
+ "both text boxes."));
+ if (!str) {
+ goto failed;
+ }
+
+ return str;
+
+ failed:
+ TALLOC_FREE(str);
+ return NULL;
+}
+
+static int _pam_create_homedir(struct pwb_context *ctx,
+ const char *dirname,
+ mode_t mode)
+{
+ struct stat sbuf;
+
+ if (stat(dirname, &sbuf) == 0) {
+ return PAM_SUCCESS;
+ }
+
+ if (mkdir(dirname, mode) != 0) {
+
+ _make_remark_format(ctx, PAM_TEXT_INFO,
+ _("Creating directory: %s failed: %s"),
+ dirname, strerror(errno));
+ _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
+ dirname, strerror(errno));
+ return PAM_PERM_DENIED;
+ }
+
+ return PAM_SUCCESS;
+}
+
+static int _pam_chown_homedir(struct pwb_context *ctx,
+ const char *dirname,
+ uid_t uid,
+ gid_t gid)
+{
+ if (chown(dirname, uid, gid) != 0) {
+ _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
+ dirname, strerror(errno));
+ return PAM_PERM_DENIED;
+ }
+
+ return PAM_SUCCESS;
+}
+
+static int _pam_mkhomedir(struct pwb_context *ctx)
+{
+ struct passwd *pwd = NULL;
+ char *token = NULL;
+ char *create_dir = NULL;
+ char *user_dir = NULL;
+ int ret;
+ const char *username;
+ mode_t mode = 0700;
+ char *safe_ptr = NULL;
+ char *p = NULL;
+
+ /* Get the username */
+ ret = pam_get_user(ctx->pamh, &username, NULL);
+ if ((ret != PAM_SUCCESS) || (!username)) {
+ _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
+ return PAM_SERVICE_ERR;
+ }
+
+ pwd = getpwnam(username);
+ if (pwd == NULL) {
+ _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
+ return PAM_USER_UNKNOWN;
+ }
+ _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
+
+ ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
+ if (ret == PAM_SUCCESS) {
+ ret = _pam_chown_homedir(ctx, pwd->pw_dir,
+ pwd->pw_uid,
+ pwd->pw_gid);
+ }
+
+ if (ret == PAM_SUCCESS) {
+ return ret;
+ }
+
+ /* maybe we need to create parent dirs */
+ create_dir = talloc_strdup(ctx, "/");
+ if (!create_dir) {
+ return PAM_BUF_ERR;
+ }
+
+ /* find final directory */
+ user_dir = strrchr(pwd->pw_dir, '/');
+ if (!user_dir) {
+ return PAM_BUF_ERR;
+ }
+ user_dir++;
+
+ _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
+
+ p = pwd->pw_dir;
+
+ while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
+
+ mode = 0755;
+
+ p = NULL;
+
+ _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
+
+ create_dir = talloc_asprintf_append(create_dir, "%s/", token);
+ if (!create_dir) {
+ return PAM_BUF_ERR;
+ }
+ _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
+
+ if (strcmp(token, user_dir) == 0) {
+ _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
+ mode = 0700;
+ }
+
+ ret = _pam_create_homedir(ctx, create_dir, mode);
+ if (ret) {
+ return ret;
+ }
+ }
+
+ return _pam_chown_homedir(ctx, create_dir,
+ pwd->pw_uid,
+ pwd->pw_gid);
+}
+
+/* talk to winbindd */
+static int winbind_auth_request(struct pwb_context *ctx,
+ const char *user,
+ const char *pass,
+ const char *member,
+ const char *cctype,
+ const int warn_pwd_expire,
+ struct wbcAuthErrorInfo **p_error,
+ struct wbcLogonUserInfo **p_info,
+ struct wbcUserPasswordPolicyInfo **p_policy,
+ time_t *pwd_last_set,
+ char **user_ret)
+{
+ wbcErr wbc_status;
+
+ struct wbcLogonUserParams logon;
+ char membership_of[1024];
+ uid_t user_uid = -1;
+ uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
+ WBFLAG_PAM_GET_PWD_POLICY;
+
+ struct wbcLogonUserInfo *info = NULL;
+ struct wbcAuthUserInfo *user_info = NULL;
+ struct wbcAuthErrorInfo *error = NULL;
+ struct wbcUserPasswordPolicyInfo *policy = NULL;
+
+ int ret = PAM_AUTH_ERR;
+ int i;
+ const char *codes[] = {
+ "NT_STATUS_PASSWORD_EXPIRED",
+ "NT_STATUS_PASSWORD_MUST_CHANGE",
+ "NT_STATUS_INVALID_WORKSTATION",
+ "NT_STATUS_INVALID_LOGON_HOURS",
+ "NT_STATUS_ACCOUNT_EXPIRED",
+ "NT_STATUS_ACCOUNT_DISABLED",
+ "NT_STATUS_ACCOUNT_LOCKED_OUT",
+ "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
+ "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
+ "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
+ "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
+ "NT_STATUS_NO_LOGON_SERVERS",
+ "NT_STATUS_WRONG_PASSWORD",
+ "NT_STATUS_ACCESS_DENIED"
+ };
+
+ if (pwd_last_set) {
+ *pwd_last_set = 0;
+ }
+
+ /* Krb5 auth always has to go against the KDC of the user's realm */
+
+ if (ctx->ctrl & WINBIND_KRB5_AUTH) {
+ flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
+ }
+
+ if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
+ struct passwd *pwd = NULL;
+
+ pwd = getpwnam(user);
+ if (pwd == NULL) {
+ return PAM_USER_UNKNOWN;
+ }
+ user_uid = pwd->pw_uid;
+ }
+
+ if (ctx->ctrl & WINBIND_KRB5_AUTH) {
+
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "enabling krb5 login flag\n");
+
+ flags |= WBFLAG_PAM_KRB5 |
+ WBFLAG_PAM_FALLBACK_AFTER_KRB5;
+ }
+
+ if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "enabling cached login flag\n");
+ flags |= WBFLAG_PAM_CACHED_LOGIN;
+ }
+
+ if (user_ret) {
+ *user_ret = NULL;
+ flags |= WBFLAG_PAM_UNIX_NAME;
+ }
+
+ if (cctype != NULL) {
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "enabling request for a %s krb5 ccache\n",
+ cctype);
+ }
+
+ if (member != NULL) {
+
+ ZERO_STRUCT(membership_of);
+
+ if (!winbind_name_list_to_sid_string_list(ctx, user, member,
+ membership_of,
+ sizeof(membership_of))) {
+ _pam_log_debug(ctx, LOG_ERR,
+ "failed to serialize membership of sid "
+ "\"%s\"\n", member);
+ return PAM_AUTH_ERR;
+ }
+ }
+
+ ZERO_STRUCT(logon);
+
+ logon.username = user;
+ logon.password = pass;
+
+ if (cctype) {
+ wbc_status = wbcAddNamedBlob(&logon.num_blobs,
+ &logon.blobs,
+ "krb5_cc_type",
+ 0,
+ (uint8_t *)cctype,
+ strlen(cctype)+1);
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ goto done;
+ }
+ }
+
+ wbc_status = wbcAddNamedBlob(&logon.num_blobs,
+ &logon.blobs,
+ "flags",
+ 0,
+ (uint8_t *)&flags,
+ sizeof(flags));
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ goto done;
+ }
+
+ wbc_status = wbcAddNamedBlob(&logon.num_blobs,
+ &logon.blobs,
+ "user_uid",
+ 0,
+ (uint8_t *)&user_uid,
+ sizeof(user_uid));
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ goto done;
+ }
+
+ if (member) {
+ wbc_status = wbcAddNamedBlob(&logon.num_blobs,
+ &logon.blobs,
+ "membership_of",
+ 0,
+ (uint8_t *)membership_of,
+ sizeof(membership_of));
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ goto done;
+ }
+ }
+
+ wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
+ ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
+ user, "wbcLogonUser");
+ wbcFreeMemory(logon.blobs);
+ logon.blobs = NULL;
+
+ if (info && info->info) {
+ user_info = info->info;
+ }
+
+ if (pwd_last_set && user_info) {
+ *pwd_last_set = user_info->pass_last_set_time;
+ }
+
+ if (p_info && info) {
+ *p_info = info;
+ }
+
+ if (p_policy && policy) {
+ *p_policy = policy;
+ }
+
+ if (p_error && error) {
+ /* We want to process the error in the caller. */
+ *p_error = error;
+ return ret;
+ }
+
+ for (i=0; i<ARRAY_SIZE(codes); i++) {
+ int _ret = ret;
+ if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
+ ret = _ret;
+ goto done;
+ }
+ }
+
+ if ((ret == PAM_SUCCESS) && user_info && policy && info) {
+
+ bool already_expired = false;
+
+ /* warn a user if the password is about to expire soon */
+ _pam_warn_password_expiry(ctx, user_info, policy,
+ warn_pwd_expire,
+ &already_expired);
+
+ if (already_expired == true) {
+
+ SMB_TIME_T last_set = user_info->pass_last_set_time;
+
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "Password has expired "
+ "(Password was last set: %lld, "
+ "the policy says it should expire here "
+ "%lld (now it's: %lu))\n",
+ (long long int)last_set,
+ (long long int)last_set +
+ policy->expire,
+ time(NULL));
+
+ return PAM_AUTHTOK_EXPIRED;
+ }
+
+ /* inform about logon type */
+ _pam_warn_logon_type(ctx, user, user_info->user_flags);
+
+ /* inform about krb5 failures */
+ _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
+
+ /* set some info3 info for other modules in the stack */
+ _pam_set_data_info3(ctx, user_info);
+
+ /* put krb5ccname into env */
+ _pam_setup_krb5_env(ctx, info);
+
+ /* If winbindd returned a username, return the pointer to it
+ * here. */
+ _pam_setup_unix_username(ctx, user_ret, info);
+ }
+
+ done:
+ if (logon.blobs) {
+ wbcFreeMemory(logon.blobs);
+ }
+ if (info && info->blobs) {
+ wbcFreeMemory(info->blobs);
+ }
+ if (error && !p_error) {
+ wbcFreeMemory(error);
+ }
+ if (info && !p_info) {
+ wbcFreeMemory(info);
+ }
+ if (policy && !p_policy) {
+ wbcFreeMemory(policy);
+ }
+
+ return ret;
+}
+
+/* talk to winbindd */
+static int winbind_chauthtok_request(struct pwb_context *ctx,
+ const char *user,
+ const char *oldpass,
+ const char *newpass,
+ time_t pwd_last_set)
+{
+ wbcErr wbc_status;
+ struct wbcChangePasswordParams params;
+ struct wbcAuthErrorInfo *error = NULL;
+ struct wbcUserPasswordPolicyInfo *policy = NULL;
+ enum wbcPasswordChangeRejectReason reject_reason = -1;
+ uint32_t flags = 0;
+
+ int i;
+ const char *codes[] = {
+ "NT_STATUS_BACKUP_CONTROLLER",
+ "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
+ "NT_STATUS_NO_LOGON_SERVERS",
+ "NT_STATUS_ACCESS_DENIED",
+ "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
+ "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
+ "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
+ };
+ int ret = PAM_AUTH_ERR;
+
+ ZERO_STRUCT(params);
+
+ if (ctx->ctrl & WINBIND_KRB5_AUTH) {
+ flags |= WBFLAG_PAM_KRB5 |
+ WBFLAG_PAM_CONTACT_TRUSTDOM;
+ }
+
+ if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
+ flags |= WBFLAG_PAM_CACHED_LOGIN;
+ }
+
+ params.account_name = user;
+ params.level = WBC_AUTH_USER_LEVEL_PLAIN;
+ params.old_password.plaintext = oldpass;
+ params.new_password.plaintext = newpass;
+ params.flags = flags;
+
+ wbc_status = wbcChangeUserPasswordEx(&params, &error, &reject_reason, &policy);
+ ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
+ user, "wbcChangeUserPasswordEx");
+
+ if (WBC_ERROR_IS_OK(wbc_status)) {
+ _pam_log(ctx, LOG_NOTICE,
+ "user '%s' password changed", user);
+ return PAM_SUCCESS;
+ }
+
+ if (!error) {
+ wbcFreeMemory(policy);
+ return ret;
+ }
+
+ for (i=0; i<ARRAY_SIZE(codes); i++) {
+ int _ret = ret;
+ if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
+ ret = _ret;
+ goto done;
+ }
+ }
+
+ if (!strcasecmp(error->nt_string,
+ "NT_STATUS_PASSWORD_RESTRICTION")) {
+
+ char *pwd_restriction_string = NULL;
+ SMB_TIME_T min_pwd_age = 0;
+
+ if (policy) {
+ min_pwd_age = policy->min_passwordage;
+ }
+
+ /* FIXME: avoid to send multiple PAM messages after another */
+ switch (reject_reason) {
+ case -1:
+ break;
+ case WBC_PWD_CHANGE_REJECT_OTHER:
+ if ((min_pwd_age > 0) &&
+ (pwd_last_set + min_pwd_age > time(NULL))) {
+ PAM_WB_REMARK_DIRECT(ctx,
+ "NT_STATUS_PWD_TOO_RECENT");
+ }
+ break;
+ case WBC_PWD_CHANGE_REJECT_TOO_SHORT:
+ PAM_WB_REMARK_DIRECT(ctx,
+ "NT_STATUS_PWD_TOO_SHORT");
+ break;
+ case WBC_PWD_CHANGE_REJECT_IN_HISTORY:
+ PAM_WB_REMARK_DIRECT(ctx,
+ "NT_STATUS_PWD_HISTORY_CONFLICT");
+ break;
+ case WBC_PWD_CHANGE_REJECT_COMPLEXITY:
+ _make_remark(ctx, PAM_ERROR_MSG,
+ _("Password does not meet "
+ "complexity requirements"));
+ break;
+ default:
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "unknown password change "
+ "reject reason: %d",
+ reject_reason);
+ break;
+ }
+
+ pwd_restriction_string =
+ _pam_compose_pwd_restriction_string(ctx, policy);
+ if (pwd_restriction_string) {
+ _make_remark(ctx, PAM_ERROR_MSG,
+ pwd_restriction_string);
+ TALLOC_FREE(pwd_restriction_string);
+ }
+ }
+ done:
+ wbcFreeMemory(error);
+ wbcFreeMemory(policy);
+
+ return ret;
+}
+
+/*
+ * Checks if a user has an account
+ *
+ * return values:
+ * 1 = User not found
+ * 0 = OK
+ * -1 = System error
+ */
+static int valid_user(struct pwb_context *ctx,
+ const char *user)
+{
+ /* check not only if the user is available over NSS calls, also make
+ * sure it's really a winbind user, this is important when stacking PAM
+ * modules in the 'account' or 'password' facility. */
+
+ wbcErr wbc_status;
+ struct passwd *pwd = NULL;
+ struct passwd *wb_pwd = NULL;
+
+ pwd = getpwnam(user);
+ if (pwd == NULL) {
+ return 1;
+ }
+
+ wbc_status = wbcGetpwnam(user, &wb_pwd);
+ wbcFreeMemory(wb_pwd);
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
+ wbcErrorString(wbc_status));
+ }
+
+ switch (wbc_status) {
+ case WBC_ERR_UNKNOWN_USER:
+ return 1;
+ case WBC_ERR_SUCCESS:
+ return 0;
+ default:
+ break;
+ }
+ return -1;
+}
+
+static char *_pam_delete(register char *xx)
+{
+ _pam_overwrite(xx);
+ _pam_drop(xx);
+ return NULL;
+}
+
+/*
+ * obtain a password from the user
+ */
+
+static int _winbind_read_password(struct pwb_context *ctx,
+ 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(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
+
+ /*
+ * make sure nothing inappropriate gets returned
+ */
+
+ *pass = token = NULL;
+
+ /*
+ * which authentication token are we getting?
+ */
+
+ if (on(WINBIND__OLD_PASSWORD, ctrl)) {
+ authtok_flag = PAM_OLDAUTHTOK;
+ } else {
+ authtok_flag = PAM_AUTHTOK;
+ }
+
+ /*
+ * should we obtain the password from a PAM item ?
+ */
+
+ if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
+ on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
+ retval = _pam_get_item(ctx->pamh, authtok_flag, &item);
+ if (retval != PAM_SUCCESS) {
+ /* very strange. */
+ _pam_log(ctx, 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(ctx, 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 */
+ } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
+ && off(WINBIND__OLD_PASSWORD, ctrl)) {
+ return PAM_AUTHTOK_RECOVER_ERR;
+ }
+ }
+ /*
+ * getting here implies we will have to get the password from the
+ * user directly.
+ */
+
+ {
+ struct pam_message msg[3], *pmsg[3];
+ struct pam_response *resp;
+ int i, replies;
+
+ /* prepare to converse */
+
+ if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
+ pmsg[0] = &msg[0];
+ msg[0].msg_style = PAM_TEXT_INFO;
+ msg[0].msg = discard_const_p(char, comment);
+ i = 1;
+ } else {
+ i = 0;
+ }
+
+ pmsg[i] = &msg[i];
+ msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
+ msg[i++].msg = discard_const_p(char, prompt1);
+ replies = 1;
+
+ if (prompt2 != NULL) {
+ pmsg[i] = &msg[i];
+ msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
+ msg[i++].msg = discard_const_p(char, prompt2);
+ ++replies;
+ }
+ /* so call the conversation expecting i responses */
+ resp = NULL;
+ retval = converse(ctx->pamh, i, pmsg, &resp);
+ if (resp == NULL) {
+ if (retval == PAM_SUCCESS) {
+ retval = PAM_AUTHTOK_RECOVER_ERR;
+ }
+ goto done;
+ }
+ if (retval != PAM_SUCCESS) {
+ _pam_drop_reply(resp, i);
+ goto done;
+ }
+
+ /* interpret the response */
+
+ token = x_strdup(resp[i - replies].resp);
+ if (!token) {
+ _pam_log(ctx, LOG_NOTICE,
+ "could not recover "
+ "authentication token");
+ retval = PAM_AUTHTOK_RECOVER_ERR;
+ goto done;
+ }
+
+ 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(ctx, PAM_ERROR_MSG,
+ MISTYPED_PASS);
+ }
+ }
+
+ /*
+ * tidy up the conversation (resp_retcode) is ignored
+ * -- what is it for anyway? AGM
+ */
+ _pam_drop_reply(resp, i);
+ }
+
+ done:
+ if (retval != PAM_SUCCESS) {
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "unable to obtain a password");
+ return retval;
+ }
+ /* 'token' is the entered password */
+
+ /* we store this password as an item */
+
+ retval = pam_set_item(ctx->pamh, authtok_flag, token);
+ _pam_delete(token); /* clean it up */
+ if (retval != PAM_SUCCESS ||
+ (retval = _pam_get_item(ctx->pamh, authtok_flag, &item)) != PAM_SUCCESS) {
+
+ _pam_log(ctx, LOG_CRIT, "error manipulating password");
+ return retval;
+
+ }
+
+ *pass = item;
+ item = NULL; /* break link to password */
+
+ return PAM_SUCCESS;
+}
+
+static const char *get_conf_item_string(struct pwb_context *ctx,
+ const char *item,
+ int config_flag)
+{
+ int i = 0;
+ const char *parm_opt = NULL;
+
+ if (!(ctx->ctrl & config_flag)) {
+ goto out;
+ }
+
+ /* let the pam opt take precedence over the pam_winbind.conf option */
+ for (i=0; i<ctx->argc; i++) {
+
+ if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
+ char *p;
+
+ if ((p = strchr(ctx->argv[i], '=')) == NULL) {
+ _pam_log(ctx, LOG_INFO,
+ "no \"=\" delimiter for \"%s\" found\n",
+ item);
+ goto out;
+ }
+ _pam_log_debug(ctx, LOG_INFO,
+ "PAM config: %s '%s'\n", item, p+1);
+ return p + 1;
+ }
+ }
+
+ if (ctx->dict) {
+ char *key = NULL;
+
+ key = talloc_asprintf(ctx, "global:%s", item);
+ if (!key) {
+ goto out;
+ }
+
+ parm_opt = iniparser_getstr(ctx->dict, key);
+ TALLOC_FREE(key);
+
+ _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
+ item, parm_opt);
+ }
+out:
+ return parm_opt;
+}
+
+static int get_config_item_int(struct pwb_context *ctx,
+ const char *item,
+ int config_flag)
+{
+ int i, parm_opt = -1;
+
+ if (!(ctx->ctrl & config_flag)) {
+ goto out;
+ }
+
+ /* let the pam opt take precedence over the pam_winbind.conf option */
+ for (i = 0; i < ctx->argc; i++) {
+
+ if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
+ char *p;
+
+ if ((p = strchr(ctx->argv[i], '=')) == NULL) {
+ _pam_log(ctx, LOG_INFO,
+ "no \"=\" delimiter for \"%s\" found\n",
+ item);
+ goto out;
+ }
+ parm_opt = atoi(p + 1);
+ _pam_log_debug(ctx, LOG_INFO,
+ "PAM config: %s '%d'\n",
+ item, parm_opt);
+ return parm_opt;
+ }
+ }
+
+ if (ctx->dict) {
+ char *key = NULL;
+
+ key = talloc_asprintf(ctx, "global:%s", item);
+ if (!key) {
+ goto out;
+ }
+
+ parm_opt = iniparser_getint(ctx->dict, key, -1);
+ TALLOC_FREE(key);
+
+ _pam_log_debug(ctx, LOG_INFO,
+ "CONFIG file: %s '%d'\n",
+ item, parm_opt);
+ }
+out:
+ return parm_opt;
+}
+
+static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
+{
+ return get_conf_item_string(ctx, "krb5_ccache_type",
+ WINBIND_KRB5_CCACHE_TYPE);
+}
+
+static const char *get_member_from_config(struct pwb_context *ctx)
+{
+ const char *ret = NULL;
+ ret = get_conf_item_string(ctx, "require_membership_of",
+ WINBIND_REQUIRED_MEMBERSHIP);
+ if (ret) {
+ return ret;
+ }
+ return get_conf_item_string(ctx, "require-membership-of",
+ WINBIND_REQUIRED_MEMBERSHIP);
+}
+
+static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
+{
+ int ret;
+ ret = get_config_item_int(ctx, "warn_pwd_expire",
+ WINBIND_WARN_PWD_EXPIRE);
+ /* no or broken setting */
+ if (ret <= 0) {
+ return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
+ }
+ return ret;
+}
+
+/**
+ * Retrieve the winbind separator.
+ *
+ * @param ctx PAM winbind context.
+ *
+ * @return string separator character. NULL on failure.
+ */
+
+static char winbind_get_separator(struct pwb_context *ctx)
+{
+ wbcErr wbc_status;
+ static struct wbcInterfaceDetails *details = NULL;
+
+ wbc_status = wbcInterfaceDetails(&details);
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ _pam_log(ctx, LOG_ERR,
+ "Could not retrieve winbind interface details: %s",
+ wbcErrorString(wbc_status));
+ return '\0';
+ }
+
+ if (!details) {
+ return '\0';
+ }
+
+ return details->winbind_separator;
+}
+
+
+/**
+ * Convert a upn to a name.
+ *
+ * @param ctx PAM winbind context.
+ * @param upn USer UPN to be trabslated.
+ *
+ * @return converted name. NULL pointer on failure. Caller needs to free.
+ */
+
+static char* winbind_upn_to_username(struct pwb_context *ctx,
+ const char *upn)
+{
+ char sep;
+ wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
+ struct wbcDomainSid sid;
+ enum wbcSidType type;
+ char *domain;
+ char *name;
+
+ /* This cannot work when the winbind separator = @ */
+
+ sep = winbind_get_separator(ctx);
+ if (!sep || sep == '@') {
+ return NULL;
+ }
+
+ /* Convert the UPN to a SID */
+
+ wbc_status = wbcLookupName("", upn, &sid, &type);
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ return NULL;
+ }
+
+ /* Convert the the SID back to the sAMAccountName */
+
+ wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ return NULL;
+ }
+
+ return talloc_asprintf(ctx, "%s\\%s", domain, name);
+}
+
+static int _pam_delete_cred(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ int retval = PAM_SUCCESS;
+ struct pwb_context *ctx = NULL;
+ struct wbcLogoffUserParams logoff;
+ struct wbcAuthErrorInfo *error = NULL;
+ const char *user;
+ wbcErr wbc_status = WBC_ERR_SUCCESS;
+
+ retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
+ if (retval) {
+ goto out;
+ }
+
+ _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
+
+ if (ctx->ctrl & WINBIND_KRB5_AUTH) {
+
+ /* destroy the ccache here */
+
+ uint32_t wbc_flags = 0;
+ const char *ccname = NULL;
+ struct passwd *pwd = NULL;
+
+ retval = pam_get_user(pamh, &user, _("Username: "));
+ if (retval) {
+ _pam_log(ctx, LOG_ERR,
+ "could not identify user");
+ goto out;
+ }
+
+ if (user == NULL) {
+ _pam_log(ctx, LOG_ERR,
+ "username was NULL!");
+ retval = PAM_USER_UNKNOWN;
+ goto out;
+ }
+
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "username [%s] obtained", user);
+
+ ccname = pam_getenv(pamh, "KRB5CCNAME");
+ if (ccname == NULL) {
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "user has no KRB5CCNAME environment");
+ }
+
+ pwd = getpwnam(user);
+ if (pwd == NULL) {
+ retval = PAM_USER_UNKNOWN;
+ goto out;
+ }
+
+ wbc_flags = WBFLAG_PAM_KRB5 |
+ WBFLAG_PAM_CONTACT_TRUSTDOM;
+
+ ZERO_STRUCT(logoff);
+
+ logoff.username = user;
+
+ if (ccname) {
+ wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
+ &logoff.blobs,
+ "ccfilename",
+ 0,
+ (uint8_t *)ccname,
+ strlen(ccname)+1);
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ goto out;
+ }
+ }
+
+ wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
+ &logoff.blobs,
+ "flags",
+ 0,
+ (uint8_t *)&wbc_flags,
+ sizeof(wbc_flags));
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ goto out;
+ }
+
+ wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
+ &logoff.blobs,
+ "user_uid",
+ 0,
+ (uint8_t *)&pwd->pw_uid,
+ sizeof(pwd->pw_uid));
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ goto out;
+ }
+
+ wbc_status = wbcLogoffUserEx(&logoff, &error);
+ retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
+ user, "wbcLogoffUser");
+ wbcFreeMemory(error);
+ wbcFreeMemory(logoff.blobs);
+
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ _pam_log(ctx, LOG_INFO,
+ "failed to logoff user %s: %s\n",
+ user, wbcErrorString(wbc_status));
+ }
+ }
+
+out:
+ if (logoff.blobs) {
+ wbcFreeMemory(logoff.blobs);
+ }
+
+ if (!WBC_ERROR_IS_OK(wbc_status)) {
+ retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
+ user, "wbcLogoffUser");
+ }
+
+ /*
+ * Delete the krb5 ccname variable from the PAM environment
+ * if it was set by winbind.
+ */
+ if (ctx->ctrl & WINBIND_KRB5_AUTH) {
+ pam_putenv(pamh, "KRB5CCNAME");
+ }
+
+ _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
+
+ TALLOC_FREE(ctx);
+
+ return retval;
+}
+
+PAM_EXTERN
+int pam_sm_authenticate(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ const char *username;
+ const char *password;
+ const char *member = NULL;
+ const char *cctype = NULL;
+ int warn_pwd_expire;
+ int retval = PAM_AUTH_ERR;
+ char *username_ret = NULL;
+ char *new_authtok_required = NULL;
+ char *real_username = NULL;
+ struct pwb_context *ctx = NULL;
+
+ retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
+ if (retval) {
+ goto out;
+ }
+
+ _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
+
+ /* Get the username */
+ retval = pam_get_user(pamh, &username, NULL);
+ if ((retval != PAM_SUCCESS) || (!username)) {
+ _pam_log_debug(ctx, 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(ctx, LOG_DEBUG,
+ "memory allocation failure when copying "
+ "username");
+ retval = PAM_SERVICE_ERR;
+ goto out;
+ }
+ }
+
+ /* Maybe this was a UPN */
+
+ if (strchr(real_username, '@') != NULL) {
+ char *samaccountname = NULL;
+
+ samaccountname = winbind_upn_to_username(ctx,
+ real_username);
+ if (samaccountname) {
+ free(real_username);
+ real_username = strdup(samaccountname);
+ }
+ }
+
+ retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
+ _("Password: "), NULL,
+ &password);
+
+ if (retval != PAM_SUCCESS) {
+ _pam_log(ctx, LOG_ERR,
+ "Could not retrieve user's password");
+ retval = PAM_AUTHTOK_ERR;
+ goto out;
+ }
+
+ /* Let's not give too much away in the log file */
+
+#ifdef DEBUG_PASSWORD
+ _pam_log_debug(ctx, LOG_INFO,
+ "Verify user '%s' with password '%s'",
+ real_username, password);
+#else
+ _pam_log_debug(ctx, LOG_INFO,
+ "Verify user '%s'", real_username);
+#endif
+
+ member = get_member_from_config(ctx);
+ cctype = get_krb5_cc_type_from_config(ctx);
+ warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
+
+ /* Now use the username to look up password */
+ retval = winbind_auth_request(ctx, real_username, password,
+ member, cctype, warn_pwd_expire,
+ NULL, NULL, NULL,
+ NULL, &username_ret);
+
+ if (retval == PAM_NEW_AUTHTOK_REQD ||
+ retval == PAM_AUTHTOK_EXPIRED) {
+
+ char *new_authtok_required_during_auth = NULL;
+
+ new_authtok_required = talloc_asprintf(NULL, "%d", retval);
+ if (!new_authtok_required) {
+ 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;
+
+ new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
+ if (!new_authtok_required_during_auth) {
+ 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;
+ }
+
+out:
+ if (username_ret) {
+ pam_set_item (pamh, PAM_USER, username_ret);
+ _pam_log_debug(ctx, LOG_INFO,
+ "Returned user was '%s'", username_ret);
+ free(username_ret);
+ }
+
+ if (real_username) {
+ free(real_username);
+ }
+
+ 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", ctx, retval);
+
+ TALLOC_FREE(ctx);
+
+ return retval;
+}
+
+PAM_EXTERN
+int pam_sm_setcred(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ int ret = PAM_SYSTEM_ERR;
+ struct pwb_context *ctx = NULL;
+
+ ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
+ if (ret) {
+ goto out;
+ }
+
+ _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
+
+ switch (flags & ~PAM_SILENT) {
+
+ case PAM_DELETE_CRED:
+ ret = _pam_delete_cred(pamh, flags, argc, argv);
+ break;
+ case PAM_REFRESH_CRED:
+ _pam_log_debug(ctx, LOG_WARNING,
+ "PAM_REFRESH_CRED not implemented");
+ ret = PAM_SUCCESS;
+ break;
+ case PAM_REINITIALIZE_CRED:
+ _pam_log_debug(ctx, LOG_WARNING,
+ "PAM_REINITIALIZE_CRED not implemented");
+ ret = PAM_SUCCESS;
+ break;
+ case PAM_ESTABLISH_CRED:
+ _pam_log_debug(ctx, LOG_WARNING,
+ "PAM_ESTABLISH_CRED not implemented");
+ ret = PAM_SUCCESS;
+ break;
+ default:
+ ret = PAM_SYSTEM_ERR;
+ break;
+ }
+
+ out:
+
+ _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
+
+ TALLOC_FREE(ctx);
+
+ return ret;
+}
+
+/*
+ * Account management. We want to verify that the account exists
+ * before returning PAM_SUCCESS
+ */
+PAM_EXTERN
+int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ const char *username;
+ int ret = PAM_USER_UNKNOWN;
+ void *tmp = NULL;
+ struct pwb_context *ctx = NULL;
+
+ ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
+ if (ret) {
+ goto out;
+ }
+
+ _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
+
+
+ /* Get the username */
+ ret = pam_get_user(pamh, &username, NULL);
+ if ((ret != PAM_SUCCESS) || (!username)) {
+ _pam_log_debug(ctx, LOG_DEBUG,
+ "can not get the username");
+ ret = PAM_SERVICE_ERR;
+ goto out;
+ }
+
+ /* Verify the username */
+ ret = valid_user(ctx, username);
+ switch (ret) {
+ case -1:
+ /* some sort of system error. The log was already printed */
+ ret = PAM_SERVICE_ERR;
+ goto out;
+ case 1:
+ /* the user does not exist */
+ _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
+ username);
+ if (ctx->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) {
+ 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(ctx, LOG_WARNING,
+ "pam_sm_acct_mgmt success but %s is set",
+ PAM_WINBIND_NEW_AUTHTOK_REQD);
+ _pam_log(ctx, 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(ctx, LOG_WARNING,
+ "pam_sm_acct_mgmt success");
+ _pam_log(ctx, LOG_NOTICE,
+ "user '%s' granted access", username);
+ ret = PAM_SUCCESS;
+ goto out;
+ }
+ }
+
+ /* Otherwise, the authentication looked good */
+ _pam_log(ctx, LOG_NOTICE,
+ "user '%s' granted access", username);
+ ret = PAM_SUCCESS;
+ goto out;
+ default:
+ /* we don't know anything about this return value */
+ _pam_log(ctx, 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:
+
+ _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
+
+ TALLOC_FREE(ctx);
+
+ return ret;
+}
+
+PAM_EXTERN
+int pam_sm_open_session(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ int ret = PAM_SUCCESS;
+ struct pwb_context *ctx = NULL;
+
+ ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
+ if (ret) {
+ goto out;
+ }
+
+ _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
+
+ if (ctx->ctrl & WINBIND_MKHOMEDIR) {
+ /* check and create homedir */
+ ret = _pam_mkhomedir(ctx);
+ }
+ out:
+ _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
+
+ TALLOC_FREE(ctx);
+
+ return ret;
+}
+
+PAM_EXTERN
+int pam_sm_close_session(pam_handle_t *pamh, int flags,
+ int argc, const char **argv)
+{
+ int ret = PAM_SUCCESS;
+ struct pwb_context *ctx = NULL;
+
+ ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
+ if (ret) {
+ goto out;
+ }
+
+ _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
+
+out:
+ _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
+
+ TALLOC_FREE(ctx);
+
+ return ret;
+}
+
+/**
+ * evaluate whether we need to re-authenticate with kerberos after a
+ * password change
+ *
+ * @param ctx PAM winbind context.
+ * @param user The username
+ *
+ * @return boolean Returns true if required, false if not.
+ */
+
+static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
+ 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
+ * NB. If we login from gdm or xdm and the password expires,
+ * we change the password, but there is no memory cache.
+ * Thus, even for passthrough login, we should do the
+ * authentication again to update memory cache.
+ * --- BoYang
+ * */
+
+ char *new_authtok_reqd_during_auth = NULL;
+ struct passwd *pwd = NULL;
+
+ _pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
+ &new_authtok_reqd_during_auth);
+ pam_set_data(ctx->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)
+{
+ unsigned int lctrl;
+ int ret;
+ bool cached_login = false;
+
+ /* <DO NOT free() THESE> */
+ const char *user;
+ char *pass_old, *pass_new;
+ /* </DO NOT free() THESE> */
+
+ char *Announce;
+
+ int retry = 0;
+ char *username_ret = NULL;
+ struct wbcAuthErrorInfo *error = NULL;
+ struct pwb_context *ctx = NULL;
+
+ ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
+ if (ret) {
+ goto out;
+ }
+
+ _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
+
+ cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
+
+ /* clearing offline bit for auth */
+ ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
+
+ /*
+ * First get the name of a user
+ */
+ ret = pam_get_user(pamh, &user, _("Username: "));
+ if (ret) {
+ _pam_log(ctx, LOG_ERR,
+ "password - could not identify user");
+ goto out;
+ }
+
+ if (user == NULL) {
+ _pam_log(ctx, LOG_ERR, "username was NULL!");
+ ret = PAM_USER_UNKNOWN;
+ goto out;
+ }
+
+ _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
+
+ /* check if this is really a user in winbindd, not only in NSS */
+ ret = valid_user(ctx, 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 = talloc_asprintf(ctx, "%s %s", greeting, user);
+ if (!Announce) {
+ _pam_log(ctx, LOG_CRIT,
+ "password - out of memory");
+ ret = PAM_BUF_ERR;
+ goto out;
+ }
+#undef greeting
+
+ lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
+ ret = _winbind_read_password(ctx, lctrl,
+ Announce,
+ _("(current) NT password: "),
+ NULL,
+ (const char **) &pass_old);
+ TALLOC_FREE(Announce);
+ if (ret != PAM_SUCCESS) {
+ _pam_log(ctx, LOG_NOTICE,
+ "password - (old) token not obtained");
+ goto out;
+ }
+
+ /* verify that this is the password for this user */
+
+ ret = winbind_auth_request(ctx, user, pass_old,
+ NULL, NULL, 0,
+ &error, NULL, NULL,
+ &pwdlastset_prelim, NULL);
+
+ if (ret != PAM_ACCT_EXPIRED &&
+ ret != PAM_AUTHTOK_EXPIRED &&
+ ret != PAM_NEW_AUTHTOK_REQD &&
+ ret != PAM_SUCCESS) {
+ pass_old = NULL;
+ goto out;
+ }
+
+ 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 (ret != PAM_SUCCESS) {
+ _pam_log(ctx, 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.
+ */
+
+ ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
+
+ if (ret != PAM_SUCCESS) {
+ _pam_log(ctx, LOG_NOTICE,
+ "user not authenticated");
+ goto out;
+ }
+
+ lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
+
+ if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
+ lctrl |= WINBIND_USE_FIRST_PASS_ARG;
+ }
+ retry = 0;
+ 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
+ */
+
+ ret = _winbind_read_password(ctx, lctrl,
+ NULL,
+ _("Enter new NT password: "),
+ _("Retype new NT password: "),
+ (const char **)&pass_new);
+
+ if (ret != PAM_SUCCESS) {
+ _pam_log_debug(ctx, LOG_ALERT,
+ "password - "
+ "new password not obtained");
+ pass_old = NULL;/* tidy up */
+ goto out;
+ }
+
+ /*
+ * At this point we know who the user is and what they
+ * propose as their new password. Verify that the new
+ * password is acceptable.
+ */
+
+ if (pass_new[0] == '\0') {/* "\0" password = NULL */
+ pass_new = NULL;
+ }
+ }
+
+ /*
+ * By reaching here we have approved the passwords and must now
+ * rebuild the password database file.
+ */
+ _pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
+ &pwdlastset_update);
+
+ /*
+ * if cached creds were enabled, make sure to set the
+ * WINBIND_CACHED_LOGIN bit here in order to have winbindd
+ * update the cached creds storage - gd
+ */
+ if (cached_login) {
+ ctx->ctrl |= WINBIND_CACHED_LOGIN;
+ }
+
+ ret = winbind_chauthtok_request(ctx, 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(ctx, user)) {
+
+ const char *member = NULL;
+ const char *cctype = NULL;
+ int warn_pwd_expire;
+ struct wbcLogonUserInfo *info = NULL;
+ struct wbcUserPasswordPolicyInfo *policy = NULL;
+
+ member = get_member_from_config(ctx);
+ cctype = get_krb5_cc_type_from_config(ctx);
+ warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
+
+ /* Keep WINBIND_CACHED_LOGIN bit for
+ * authentication after changing the password.
+ * This will update the cached credentials in case
+ * that winbindd_dual_pam_chauthtok() fails
+ * to update them.
+ * --- BoYang
+ * */
+
+ ret = winbind_auth_request(ctx, user, pass_new,
+ member, cctype, 0,
+ &error, &info, &policy,
+ NULL, &username_ret);
+ _pam_overwrite(pass_new);
+ _pam_overwrite(pass_old);
+ pass_old = pass_new = NULL;
+
+ if (ret == PAM_SUCCESS) {
+
+ struct wbcAuthUserInfo *user_info = NULL;
+
+ if (info && info->info) {
+ user_info = info->info;
+ }
+
+ /* warn a user if the password is about to
+ * expire soon */
+ _pam_warn_password_expiry(ctx, user_info, policy,
+ warn_pwd_expire,
+ NULL);
+
+ /* set some info3 info for other modules in the
+ * stack */
+ _pam_set_data_info3(ctx, user_info);
+
+ /* put krb5ccname into env */
+ _pam_setup_krb5_env(ctx, info);
+
+ if (username_ret) {
+ pam_set_item(pamh, PAM_USER,
+ username_ret);
+ _pam_log_debug(ctx, LOG_INFO,
+ "Returned user was '%s'",
+ username_ret);
+ free(username_ret);
+ }
+
+ wbcFreeMemory(info);
+ wbcFreeMemory(policy);
+ }
+
+ goto out;
+ }
+ } else {
+ ret = PAM_SERVICE_ERR;
+ }
+
+out:
+ {
+ /* Deal with offline errors. */
+ int i;
+ const char *codes[] = {
+ "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
+ "NT_STATUS_NO_LOGON_SERVERS",
+ "NT_STATUS_ACCESS_DENIED"
+ };
+
+ for (i=0; i<ARRAY_SIZE(codes); i++) {
+ int _ret;
+ if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
+ break;
+ }
+ }
+ }
+
+ wbcFreeMemory(error);
+
+ _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
+
+ TALLOC_FREE(ctx);
+
+ 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
+};
+
+#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> 2005-2008
+ * Copyright (c) Jan Rêkorajski 1999.
+ * Copyright (c) Andrew G. Morgan 1996-8.
+ * Copyright (c) Alex O. Yuriev, 1996.
+ * Copyright (c) Cristian Gafton 1996.
+ * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, and the entire permission notice in its entirety,
+ * including the disclaimer of warranties.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * ALTERNATIVELY, this product may be distributed under the terms of
+ * the GNU Public License, in which case the provisions of the GPL are
+ * required INSTEAD OF the above restrictions. (This clause is
+ * necessary due to a potential bad interaction between the GPL and
+ * the restrictions contained in a BSD-style copyright.)
+ *
+ * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
generated by cgit (git 2.34.1) at 2024-12-26 04:38:27 +0000