pam_winbind: no longer use wbcUserPasswordPolicyInfo when authenticating
[kai/samba-autobuild/.git] / nsswitch / pam_winbind.c
index f13e365b87cab40d908fbc2694f8af1446c42ed1..4ae646442f8af15b368a4ea1857d778036cda09e 100644 (file)
 */
 
 #include "pam_winbind.h"
-#define CONST_DISCARD(type,ptr) ((type)(void *)ptr)
 
+enum pam_winbind_request_type
+{
+       PAM_WINBIND_AUTHENTICATE,
+       PAM_WINBIND_SETCRED,
+       PAM_WINBIND_ACCT_MGMT,
+       PAM_WINBIND_OPEN_SESSION,
+       PAM_WINBIND_CLOSE_SESSION,
+       PAM_WINBIND_CHAUTHTOK,
+       PAM_WINBIND_CLEANUP
+};
 
 static int wbc_error_to_pam_error(wbcErr status)
 {
@@ -140,7 +149,7 @@ static const char *_pam_error_code_str(int err)
 #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, \
+                              function " returning %d (%s)", ctx ? ctx->pamh : NULL, retval, \
                               _pam_error_code_str(retval)); \
                _pam_log_state(ctx); \
        } while (0)
@@ -164,25 +173,6 @@ static inline void textdomain_init(void)
 #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
@@ -201,17 +191,17 @@ static void _pam_log_int(const pam_handle_t *pamh,
 {
        char *format2 = NULL;
        const char *service;
+       int ret;
 
-       _pam_get_item(pamh, PAM_SERVICE, &service);
+       pam_get_item(pamh, PAM_SERVICE, (const void **) &service);
 
-       format2 = (char *)malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
-       if (format2 == NULL) {
+       ret = asprintf(&format2, "%s(%s): %s", MODULE_NAME, service, format);
+       if (ret == -1) {
                /* what else todo ? */
                vsyslog(err, format, args);
                return;
        }
 
-       sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
        vsyslog(err, format2, args);
        SAFE_FREE(format2);
 }
@@ -280,7 +270,7 @@ 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)) {
+       if (!r || !_pam_log_is_debug_enabled(r->ctrl)) {
                return;
        }
 
@@ -349,10 +339,29 @@ static void _pam_log_state_datum(struct pwb_context *ctx,
 #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
        _pam_log_state_datum(ctx, item_type, #item_type, \
                             _LOG_PASSWORD_AS_STRING)
+/*
+ * wrapper to preserve old behaviour of iniparser which ignored
+ * key values that had no value assigned like
+ *    key =
+ * for a key like above newer iniparser will return a zero-length
+ * string, previously iniparser would return NULL
+ *
+ * JRA: For compatibility, tiniparser behaves like iniparser.
+ */
+static const char *tiniparser_getstring_nonempty(struct tiniparser_dictionary *d,
+                       const char *key,
+                       const char *def)
+{
+       const char *ret = tiniparser_getstring(d, key, def);
+       if (ret && strlen(ret) == 0) {
+               ret = NULL;
+       }
+       return ret;
+}
 
 static void _pam_log_state(struct pwb_context *ctx)
 {
-       if (!_pam_log_is_debug_state_enabled(ctx->ctrl)) {
+       if (!ctx || !_pam_log_is_debug_state_enabled(ctx->ctrl)) {
                return;
        }
 
@@ -388,13 +397,14 @@ static int _pam_parse(const pam_handle_t *pamh,
                      int flags,
                      int argc,
                      const char **argv,
-                     dictionary **result_d)
+                     enum pam_winbind_request_type type,
+                     struct tiniparser_dictionary **result_d)
 {
        int ctrl = 0;
        const char *config_file = NULL;
        int i;
        const char **v;
-       dictionary *d = NULL;
+       struct tiniparser_dictionary *d = NULL;
 
        if (flags & PAM_SILENT) {
                ctrl |= WINBIND_SILENT;
@@ -412,51 +422,51 @@ static int _pam_parse(const pam_handle_t *pamh,
                config_file = PAM_WINBIND_CONFIG_FILE;
        }
 
-       d = iniparser_load(CONST_DISCARD(char *, config_file));
+       d = tiniparser_load(config_file);
        if (d == NULL) {
                goto config_from_pam;
        }
 
-       if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:debug"), false)) {
+       if (tiniparser_getboolean(d, "global:debug", false)) {
                ctrl |= WINBIND_DEBUG_ARG;
        }
 
-       if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:debug_state"), false)) {
+       if (tiniparser_getboolean(d, "global:debug_state", false)) {
                ctrl |= WINBIND_DEBUG_STATE;
        }
 
-       if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:cached_login"), false)) {
+       if (tiniparser_getboolean(d, "global:cached_login", false)) {
                ctrl |= WINBIND_CACHED_LOGIN;
        }
 
-       if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:krb5_auth"), false)) {
+       if (tiniparser_getboolean(d, "global:krb5_auth", false)) {
                ctrl |= WINBIND_KRB5_AUTH;
        }
 
-       if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:silent"), false)) {
+       if (tiniparser_getboolean(d, "global:silent", false)) {
                ctrl |= WINBIND_SILENT;
        }
 
-       if (iniparser_getstr(d, CONST_DISCARD(char *, "global:krb5_ccache_type")) != NULL) {
+       if (tiniparser_getstring_nonempty(d, "global:krb5_ccache_type", NULL) != NULL) {
                ctrl |= WINBIND_KRB5_CCACHE_TYPE;
        }
 
-       if ((iniparser_getstr(d, CONST_DISCARD(char *, "global:require-membership-of"))
+       if ((tiniparser_getstring_nonempty(d, "global:require-membership-of", NULL)
             != NULL) ||
-           (iniparser_getstr(d, CONST_DISCARD(char *, "global:require_membership_of"))
+           (tiniparser_getstring_nonempty(d, "global:require_membership_of", NULL)
             != NULL)) {
                ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
        }
 
-       if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:try_first_pass"), false)) {
+       if (tiniparser_getboolean(d, "global:try_first_pass", false)) {
                ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
        }
 
-       if (iniparser_getint(d, CONST_DISCARD(char *, "global:warn_pwd_expire"), 0)) {
+       if (tiniparser_getint(d, "global:warn_pwd_expire", 0)) {
                ctrl |= WINBIND_WARN_PWD_EXPIRE;
        }
 
-       if (iniparser_getboolean(d, CONST_DISCARD(char *, "global:mkhomedir"), false)) {
+       if (tiniparser_getboolean(d, "global:mkhomedir", false)) {
                ctrl |= WINBIND_MKHOMEDIR;
        }
 
@@ -479,11 +489,15 @@ config_from_pam:
                        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")))
+               else if ((type == PAM_WINBIND_AUTHENTICATE
+                         || type == PAM_WINBIND_SETCRED)
+                        && !strncasecmp(*v, "require_membership_of",
+                                        strlen("require_membership_of")))
                        ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
-               else if (!strncasecmp(*v, "require-membership-of",
-                                     strlen("require-membership-of")))
+               else if ((type == PAM_WINBIND_AUTHENTICATE
+                         || type == PAM_WINBIND_SETCRED)
+                        && !strncasecmp(*v, "require-membership-of",
+                                        strlen("require-membership-of")))
                        ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
                else if (!strcasecmp(*v, "krb5_auth"))
                        ctrl |= WINBIND_KRB5_AUTH;
@@ -494,7 +508,10 @@ config_from_pam:
                        ctrl |= WINBIND_CACHED_LOGIN;
                else if (!strcasecmp(*v, "mkhomedir"))
                        ctrl |= WINBIND_MKHOMEDIR;
-               else {
+               else if (!strncasecmp(*v, "warn_pwd_expire",
+                       strlen("warn_pwd_expire")))
+                       ctrl |= WINBIND_WARN_PWD_EXPIRE;
+               else if (type != PAM_WINBIND_CLEANUP) {
                        __pam_log(pamh, ctrl, LOG_ERR,
                                 "pam_parse: unknown option: %s", *v);
                        return -1;
@@ -506,7 +523,7 @@ config_from_pam:
                *result_d = d;
        } else {
                if (d) {
-                       iniparser_freedict(d);
+                       tiniparser_freedict(d);
                }
        }
 
@@ -520,9 +537,11 @@ static int _pam_winbind_free_context(struct pwb_context *ctx)
        }
 
        if (ctx->dict) {
-               iniparser_freedict(ctx->dict);
+               tiniparser_freedict(ctx->dict);
        }
 
+       wbcCtxFree(ctx->wbc_ctx);
+
        return 0;
 }
 
@@ -530,15 +549,17 @@ static int _pam_winbind_init_context(pam_handle_t *pamh,
                                     int flags,
                                     int argc,
                                     const char **argv,
+                                    enum pam_winbind_request_type type,
                                     struct pwb_context **ctx_p)
 {
        struct pwb_context *r = NULL;
+       int ctrl_code;
 
 #ifdef HAVE_GETTEXT
        textdomain_init();
 #endif
 
-       r = TALLOC_ZERO_P(NULL, struct pwb_context);
+       r = talloc_zero(NULL, struct pwb_context);
        if (!r) {
                return PAM_BUF_ERR;
        }
@@ -549,8 +570,15 @@ static int _pam_winbind_init_context(pam_handle_t *pamh,
        r->flags = flags;
        r->argc = argc;
        r->argv = argv;
-       r->ctrl = _pam_parse(pamh, flags, argc, argv, &r->dict);
-       if (r->ctrl == -1) {
+       ctrl_code = _pam_parse(pamh, flags, argc, argv, type, &r->dict);
+       if (ctrl_code == -1) {
+               TALLOC_FREE(r);
+               return PAM_SYSTEM_ERR;
+       }
+       r->ctrl = ctrl_code;
+
+       r->wbc_ctx = wbcCtxCreate();
+       if (r->wbc_ctx == NULL) {
                TALLOC_FREE(r);
                return PAM_SYSTEM_ERR;
        }
@@ -564,7 +592,7 @@ static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
                                      void *data,
                                      int error_status)
 {
-       int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
+       int ctrl = _pam_parse(pamh, 0, 0, NULL, PAM_WINBIND_CLEANUP, NULL);
        if (_pam_log_is_debug_state_enabled(ctrl)) {
                __pam_log_debug(pamh, ctrl, LOG_DEBUG,
                               "[pamh: %p] CLEAN: cleaning up PAM data %p "
@@ -582,7 +610,7 @@ static const struct ntstatus_errors {
        {"NT_STATUS_OK",
                N_("Success")},
        {"NT_STATUS_BACKUP_CONTROLLER",
-               N_("No primary Domain Controler available")},
+               N_("No primary Domain Controller available")},
        {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
                N_("No domain controllers found")},
        {"NT_STATUS_NO_LOGON_SERVERS",
@@ -639,16 +667,16 @@ static const char *_get_ntstatus_error_string(const char *nt_status_string)
 
 static int converse(const pam_handle_t *pamh,
                    int nargs,
-                   struct pam_message **message,
+                   const struct pam_message **message,
                    struct pam_response **response)
 {
        int retval;
        struct pam_conv *conv;
 
-       retval = _pam_get_item(pamh, 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,
+                                   discard_const_p(const struct pam_message *, message),
                                    response, conv->appdata_ptr);
        }
 
@@ -662,7 +690,8 @@ static int _make_remark(struct pwb_context *ctx,
 {
        int retval = PAM_SUCCESS;
 
-       struct pam_message *pmsg[1], msg[1];
+       const struct pam_message *pmsg[1];
+       struct pam_message msg[1];
        struct pam_response *resp;
 
        if (ctx->flags & WINBIND_SILENT) {
@@ -747,6 +776,11 @@ static int pam_winbind_request_log(struct pwb_context *ctx,
                        return PAM_IGNORE;
                }
                return retval;
+       case PAM_AUTHTOK_ERR:
+               /* Authentication token manipulation error */
+               _pam_log(ctx, LOG_WARNING, "user `%s' authentication token change failed "
+                       "(pwd complexity/history/min_age not met?)", user);
+               return retval;
        case PAM_SUCCESS:
                /* Otherwise, the authentication looked good */
                if (strcmp(fn, "wbcLogonUser") == 0) {
@@ -810,15 +844,14 @@ static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
 #if defined(HAVE_PAM_RADIO_TYPE)
 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
 {
-       struct pam_message msg, *pmsg;
+       struct pam_message msg;
+       const struct pam_message *pmsg;
        struct pam_response *resp = NULL;
-       const char *prompt;
        int ret;
        bool retval = false;
-       prompt = _("Do you want to change your password now?");
        pmsg = &msg;
        msg.msg_style = PAM_RADIO_TYPE;
-       msg.msg = prompt;
+       msg.msg = _("Do you want to change your password now?");
        ret = converse(ctx->pamh, 1, &pmsg, &resp);
        if (resp == NULL) {
                if (ret == PAM_SUCCESS) {
@@ -831,7 +864,7 @@ static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
        }
        _pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
 
-       if (strcasecmp(resp->resp, "yes") == 0) {
+       if ((resp->resp != NULL) && (strcasecmp(resp->resp, "yes") == 0)) {
                retval = true;
        }
 
@@ -971,7 +1004,6 @@ static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
 
 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,
                                      bool *change_pwd)
@@ -979,7 +1011,7 @@ static void _pam_warn_password_expiry(struct pwb_context *ctx,
        time_t now = time(NULL);
        time_t next_change = 0;
 
-       if (!info || !policy) {
+       if (info == NULL) {
                return;
        }
 
@@ -1011,23 +1043,6 @@ static void _pam_warn_password_expiry(struct pwb_context *ctx,
                return;
        }
 
-       /* now check for the global password policy */
-       /* good catch from Ralf Haferkamp: an expiry of "never" is translated
-        * to -1 */
-       if ((policy->expire == (int64_t)-1) ||
-           (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,
-                                             change_pwd)) {
-               return;
-       }
-
        /* no warning sent */
 }
 
@@ -1049,15 +1064,9 @@ 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;
+       size_t len;
+       len = strlcat(dest, src, dest_buffer_size);
+       return (len < dest_buffer_size);
 }
 
 /**
@@ -1077,12 +1086,11 @@ static bool winbind_name_to_sid_string(struct pwb_context *ctx,
                                       char *sid_list_buffer,
                                       int sid_list_buffer_size)
 {
-       const char* sid_string = NULL;
-       char *sid_str = NULL;
+       char sid_string[WBC_SID_STRING_BUFLEN];
 
        /* lookup name? */
        if (IS_SID_STRING(name)) {
-               sid_string = name;
+               strlcpy(sid_string, name, sizeof(sid_string));
        } else {
                wbcErr wbc_status;
                struct wbcDomainSid sid;
@@ -1091,28 +1099,24 @@ static bool winbind_name_to_sid_string(struct pwb_context *ctx,
                _pam_log_debug(ctx, LOG_DEBUG,
                               "no sid given, looking up: %s\n", name);
 
-               wbc_status = wbcLookupName("", name, &sid, &type);
+               wbc_status = wbcCtxLookupName(ctx->wbc_ctx,
+                                             "",
+                                             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;
-               }
-
-               sid_string = sid_str;
+               wbcSidToStringBuf(&sid, sid_string, sizeof(sid_string));
        }
 
        if (!safe_append_string(sid_list_buffer, sid_string,
                                sid_list_buffer_size)) {
-               wbcFreeMemory(sid_str);
                return false;
        }
-
-       wbcFreeMemory(sid_str);
        return true;
 }
 
@@ -1193,6 +1197,12 @@ static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
                _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
                                "to sid, please contact your administrator to see "
                                "if group %s is valid."), search_location, search_location);
+
+               /* If no valid groups were converted we should fail outright */
+               if (name_list != NULL && strlen(sid_list_buffer) == 0) {
+                       result = false;
+                       goto out;
+               }
                /*
                 * The lookup of the last name failed..
                 * It results in require_member_of_sid ends with ','
@@ -1223,7 +1233,7 @@ out:
 static void _pam_setup_krb5_env(struct pwb_context *ctx,
                                struct wbcLogonUserInfo *info)
 {
-       char var[PATH_MAX];
+       char *var = NULL;
        int ret;
        uint32_t i;
        const char *krb5ccname = NULL;
@@ -1250,16 +1260,17 @@ static void _pam_setup_krb5_env(struct pwb_context *ctx,
        _pam_log_debug(ctx, LOG_DEBUG,
                       "request returned KRB5CCNAME: %s", krb5ccname);
 
-       if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
+       if (asprintf(&var, "KRB5CCNAME=%s", krb5ccname) == -1) {
                return;
        }
 
        ret = pam_putenv(ctx->pamh, var);
-       if (ret) {
+       if (ret != PAM_SUCCESS) {
                _pam_log(ctx, LOG_ERR,
                         "failed to set KRB5CCNAME to %s: %s",
                         var, pam_strerror(ctx->pamh, ret));
        }
+       free(var);
 }
 
 /**
@@ -1320,7 +1331,7 @@ static void _pam_set_data_string(struct pwb_context *ctx,
 
        ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
                           _pam_winbind_cleanup_func);
-       if (ret) {
+       if (ret != PAM_SUCCESS) {
                _pam_log_debug(ctx, LOG_DEBUG,
                               "Could not set data %s: %s\n",
                               data_name, pam_strerror(ctx->pamh, ret));
@@ -1432,12 +1443,12 @@ static void _pam_warn_krb5_failure(struct pwb_context *ctx,
 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
                                       const struct wbcAuthErrorInfo *e,
                                       const char *nt_status_string,
-                                      int *pam_error)
+                                      int *pam_err)
 {
        const char *ntstatus = NULL;
        const char *error_string = NULL;
 
-       if (!e || !pam_error) {
+       if (!e || !pam_err) {
                return false;
        }
 
@@ -1451,18 +1462,18 @@ static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
                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;
+                       *pam_err = e->pam_error;
                        return true;
                }
 
                if (e->display_string) {
                        _make_remark(ctx, PAM_ERROR_MSG, _(e->display_string));
-                       *pam_error = e->pam_error;
+                       *pam_err = e->pam_error;
                        return true;
                }
 
                _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
-               *pam_error = e->pam_error;
+               *pam_err = e->pam_error;
 
                return true;
        }
@@ -1648,7 +1659,7 @@ static int _pam_mkhomedir(struct pwb_context *ctx)
                }
 
                ret = _pam_create_homedir(ctx, create_dir, mode);
-               if (ret) {
+               if (ret != PAM_SUCCESS) {
                        return ret;
                }
        }
@@ -1667,23 +1678,17 @@ static int winbind_auth_request(struct pwb_context *ctx,
                                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;
-
+       uint32_t flags = WBFLAG_PAM_INFO3_TEXT;
        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[] = {
@@ -1773,7 +1778,7 @@ static int winbind_auth_request(struct pwb_context *ctx,
                                             &logon.blobs,
                                             "krb5_cc_type",
                                             0,
-                                            (uint8_t *)cctype,
+                                            discard_const_p(uint8_t, cctype),
                                             strlen(cctype)+1);
                if (!WBC_ERROR_IS_OK(wbc_status)) {
                        goto done;
@@ -1812,7 +1817,11 @@ static int winbind_auth_request(struct pwb_context *ctx,
                }
        }
 
-       wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
+       wbc_status = wbcCtxLogonUser(ctx->wbc_ctx,
+                                    &logon,
+                                    &info,
+                                    &error,
+                                    NULL);
        ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
                                          user, "wbcLogonUser");
        wbcFreeMemory(logon.blobs);
@@ -1830,10 +1839,6 @@ static int winbind_auth_request(struct pwb_context *ctx,
                *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;
@@ -1848,13 +1853,13 @@ static int winbind_auth_request(struct pwb_context *ctx,
                }
        }
 
-       if ((ret == PAM_SUCCESS) && user_info && policy && info) {
+       if ((ret == PAM_SUCCESS) && user_info && info) {
 
                bool already_expired = false;
                bool change_pwd = false;
 
                /* warn a user if the password is about to expire soon */
-               _pam_warn_password_expiry(ctx, user_info, policy,
+               _pam_warn_password_expiry(ctx, user_info,
                                          warn_pwd_expire,
                                          &already_expired,
                                          &change_pwd);
@@ -1862,15 +1867,15 @@ static int winbind_auth_request(struct pwb_context *ctx,
                if (already_expired == true) {
 
                        SMB_TIME_T last_set = user_info->pass_last_set_time;
+                       SMB_TIME_T must_set = user_info->pass_must_change_time;
 
                        _pam_log_debug(ctx, LOG_DEBUG,
                                       "Password has expired "
                                       "(Password was last set: %lld, "
-                                      "the policy says it should expire here "
+                                      "it must be changed here "
                                       "%lld (now it's: %ld))\n",
                                       (long long int)last_set,
-                                      (long long int)last_set +
-                                      policy->expire,
+                                      (long long int)must_set,
                                       (long)time(NULL));
 
                        return PAM_AUTHTOK_EXPIRED;
@@ -1899,9 +1904,7 @@ static int winbind_auth_request(struct pwb_context *ctx,
        }
 
  done:
-       if (logon.blobs) {
-               wbcFreeMemory(logon.blobs);
-       }
+       wbcFreeMemory(logon.blobs);
        if (info && info->blobs && !p_info) {
                wbcFreeMemory(info->blobs);
        }
@@ -1911,9 +1914,6 @@ static int winbind_auth_request(struct pwb_context *ctx,
        if (info && !p_info) {
                wbcFreeMemory(info);
        }
-       if (policy && !p_policy) {
-               wbcFreeMemory(policy);
-       }
 
        return ret;
 }
@@ -1956,12 +1956,16 @@ static int winbind_chauthtok_request(struct pwb_context *ctx,
        }
 
        params.account_name             = user;
-       params.level                    = WBC_AUTH_USER_LEVEL_PLAIN;
+       params.level                    = WBC_CHANGE_PASSWORD_LEVEL_PLAIN;
        params.old_password.plaintext   = oldpass;
        params.new_password.plaintext   = newpass;
        params.flags                    = flags;
 
-       wbc_status = wbcChangeUserPasswordEx(&params, &error, &reject_reason, &policy);
+       wbc_status = wbcCtxChangeUserPasswordEx(ctx->wbc_ctx,
+                                               &params,
+                                               &error,
+                                               &reject_reason,
+                                               &policy);
        ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
                                          user, "wbcChangeUserPasswordEx");
 
@@ -1995,7 +1999,7 @@ static int winbind_chauthtok_request(struct pwb_context *ctx,
                }
 
                /* FIXME: avoid to send multiple PAM messages after another */
-               switch (reject_reason) {
+               switch ((int)reject_reason) {
                        case -1:
                                break;
                        case WBC_PWD_CHANGE_NO_ERROR:
@@ -2065,7 +2069,7 @@ static int valid_user(struct pwb_context *ctx,
                return 1;
        }
 
-       wbc_status = wbcGetpwnam(user, &wb_pwd);
+       wbc_status = wbcCtxGetpwnam(ctx->wbc_ctx, user, &wb_pwd);
        wbcFreeMemory(wb_pwd);
        if (!WBC_ERROR_IS_OK(wbc_status)) {
                _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
@@ -2074,6 +2078,9 @@ static int valid_user(struct pwb_context *ctx,
 
        switch (wbc_status) {
                case WBC_ERR_UNKNOWN_USER:
+               /* match other insane libwbclient return codes */
+               case WBC_ERR_WINBIND_NOT_AVAILABLE:
+               case WBC_ERR_DOMAIN_NOT_FOUND:
                        return 1;
                case WBC_ERR_SUCCESS:
                        return 0;
@@ -2130,7 +2137,9 @@ static int _winbind_read_password(struct pwb_context *ctx,
 
        if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
            on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
-               retval = _pam_get_item(ctx->pamh, authtok_flag, &item);
+               retval = pam_get_item(ctx->pamh,
+                                     authtok_flag,
+                                     (const void **) &item);
                if (retval != PAM_SUCCESS) {
                        /* very strange. */
                        _pam_log(ctx, LOG_ALERT,
@@ -2156,7 +2165,8 @@ static int _winbind_read_password(struct pwb_context *ctx,
         */
 
        {
-               struct pam_message msg[3], *pmsg[3];
+               struct pam_message msg[3];
+               const struct pam_message *pmsg[3];
                struct pam_response *resp;
                int i, replies;
 
@@ -2238,7 +2248,7 @@ static int _winbind_read_password(struct pwb_context *ctx,
        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) {
+           (retval = pam_get_item(ctx->pamh, authtok_flag, (const void **) &item)) != PAM_SUCCESS) {
 
                _pam_log(ctx, LOG_CRIT, "error manipulating password");
                return retval;
@@ -2288,7 +2298,7 @@ static const char *get_conf_item_string(struct pwb_context *ctx,
                        goto out;
                }
 
-               parm_opt = iniparser_getstr(ctx->dict, key);
+               parm_opt = tiniparser_getstring_nonempty(ctx->dict, key, NULL);
                TALLOC_FREE(key);
 
                _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
@@ -2336,7 +2346,7 @@ static int get_config_item_int(struct pwb_context *ctx,
                        goto out;
                }
 
-               parm_opt = iniparser_getint(ctx->dict, key, -1);
+               parm_opt = tiniparser_getint(ctx->dict, key, -1);
                TALLOC_FREE(key);
 
                _pam_log_debug(ctx, LOG_INFO,
@@ -2358,7 +2368,7 @@ 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) {
+       if (ret != NULL) {
                return ret;
        }
        return get_conf_item_string(ctx, "require-membership-of",
@@ -2371,7 +2381,7 @@ static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
        ret = get_config_item_int(ctx, "warn_pwd_expire",
                                  WINBIND_WARN_PWD_EXPIRE);
        /* no or broken setting */
-       if (ret <= 0) {
+       if (ret < 0) {
                return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
        }
        return ret;
@@ -2390,7 +2400,7 @@ static char winbind_get_separator(struct pwb_context *ctx)
        wbcErr wbc_status;
        static struct wbcInterfaceDetails *details = NULL;
 
-       wbc_status = wbcInterfaceDetails(&details);
+       wbc_status = wbcCtxInterfaceDetails(ctx->wbc_ctx, &details);
        if (!WBC_ERROR_IS_OK(wbc_status)) {
                _pam_log(ctx, LOG_ERR,
                         "Could not retrieve winbind interface details: %s",
@@ -2410,7 +2420,7 @@ static char winbind_get_separator(struct pwb_context *ctx)
  * Convert a upn to a name.
  *
  * @param ctx PAM winbind context.
- * @param upn  USer UPN to be trabslated.
+ * @param upn  User UPN to be translated.
  *
  * @return converted name. NULL pointer on failure. Caller needs to free.
  */
@@ -2422,9 +2432,10 @@ static char* winbind_upn_to_username(struct pwb_context *ctx,
        wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
        struct wbcDomainSid sid;
        enum wbcSidType type;
-       char *domain;
+       char *domain = NULL;
        char *name;
        char *p;
+       char *result;
 
        /* This cannot work when the winbind separator = @ */
 
@@ -2437,30 +2448,38 @@ static char* winbind_upn_to_username(struct pwb_context *ctx,
        if (!name) {
                return NULL;
        }
-       if ((p = strchr(name, '@')) != NULL) {
-               *p = 0;
-               domain = p + 1;
+
+       p = strchr(name, '@');
+       if (p == NULL) {
+               TALLOC_FREE(name);
+               return NULL;
        }
+       *p = '\0';
+       domain = p + 1;
 
        /* Convert the UPN to a SID */
 
-       wbc_status = wbcLookupName(domain, name, &sid, &type);
+       wbc_status = wbcCtxLookupName(ctx->wbc_ctx, domain, name, &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);
+       wbc_status = wbcCtxLookupSid(ctx->wbc_ctx, &sid, &domain, &name, &type);
        if (!WBC_ERROR_IS_OK(wbc_status)) {
                return NULL;
        }
 
-       return talloc_asprintf(ctx, "%s\\%s", domain, name);
+       result = talloc_asprintf(ctx, "%s%c%s", domain, sep, name);
+       wbcFreeMemory(domain);
+       wbcFreeMemory(name);
+       return result;
 }
 
 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
-                        int argc, const char **argv)
+                           int argc, enum pam_winbind_request_type type,
+                           const char **argv)
 {
        int retval = PAM_SUCCESS;
        struct pwb_context *ctx = NULL;
@@ -2471,9 +2490,9 @@ static int _pam_delete_cred(pam_handle_t *pamh, int flags,
 
        ZERO_STRUCT(logoff);
 
-       retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
-       if (retval) {
-               goto out;
+       retval = _pam_winbind_init_context(pamh, flags, argc, argv, type, &ctx);
+       if (retval != PAM_SUCCESS) {
+               return retval;
        }
 
        _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
@@ -2487,7 +2506,7 @@ static int _pam_delete_cred(pam_handle_t *pamh, int flags,
                struct passwd *pwd = NULL;
 
                retval = pam_get_user(pamh, &user, _("Username: "));
-               if (retval) {
+               if (retval != PAM_SUCCESS) {
                        _pam_log(ctx, LOG_ERR,
                                 "could not identify user");
                        goto out;
@@ -2525,7 +2544,7 @@ static int _pam_delete_cred(pam_handle_t *pamh, int flags,
                                                     &logoff.blobs,
                                                     "ccfilename",
                                                     0,
-                                                    (uint8_t *)ccname,
+                                                    discard_const_p(uint8_t, ccname),
                                                     strlen(ccname)+1);
                        if (!WBC_ERROR_IS_OK(wbc_status)) {
                                goto out;
@@ -2552,7 +2571,7 @@ static int _pam_delete_cred(pam_handle_t *pamh, int flags,
                        goto out;
                }
 
-               wbc_status = wbcLogoffUserEx(&logoff, &error);
+               wbc_status = wbcCtxLogoffUserEx(ctx->wbc_ctx, &logoff, &error);
                retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
                                                     user, "wbcLogoffUser");
                wbcFreeMemory(error);
@@ -2606,9 +2625,10 @@ int pam_sm_authenticate(pam_handle_t *pamh, int flags,
        char *real_username = NULL;
        struct pwb_context *ctx = NULL;
 
-       retval = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
-       if (retval) {
-               goto out;
+       retval = _pam_winbind_init_context(pamh, flags, argc, argv,
+                                          PAM_WINBIND_AUTHENTICATE, &ctx);
+       if (retval != PAM_SUCCESS) {
+               return retval;
        }
 
        _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
@@ -2690,8 +2710,7 @@ int pam_sm_authenticate(pam_handle_t *pamh, int flags,
        /* 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);
+                                     NULL, NULL, NULL, &username_ret);
 
        if (retval == PAM_NEW_AUTHTOK_REQD ||
            retval == PAM_AUTHTOK_EXPIRED) {
@@ -2757,9 +2776,10 @@ int pam_sm_setcred(pam_handle_t *pamh, int flags,
        int ret = PAM_SYSTEM_ERR;
        struct pwb_context *ctx = NULL;
 
-       ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
-       if (ret) {
-               goto out;
+       ret = _pam_winbind_init_context(pamh, flags, argc, argv,
+                                       PAM_WINBIND_SETCRED, &ctx);
+       if (ret != PAM_SUCCESS) {
+               return ret;
        }
 
        _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
@@ -2767,7 +2787,8 @@ int pam_sm_setcred(pam_handle_t *pamh, int flags,
        switch (flags & ~PAM_SILENT) {
 
                case PAM_DELETE_CRED:
-                       ret = _pam_delete_cred(pamh, flags, argc, argv);
+                       ret = _pam_delete_cred(pamh, flags, argc,
+                                              PAM_WINBIND_SETCRED, argv);
                        break;
                case PAM_REFRESH_CRED:
                        _pam_log_debug(ctx, LOG_WARNING,
@@ -2789,8 +2810,6 @@ int pam_sm_setcred(pam_handle_t *pamh, int flags,
                        break;
        }
 
- out:
-
        _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
 
        TALLOC_FREE(ctx);
@@ -2808,12 +2827,13 @@ int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
 {
        const char *username;
        int ret = PAM_USER_UNKNOWN;
-       void *tmp = NULL;
+       const char *tmp = NULL;
        struct pwb_context *ctx = NULL;
 
-       ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
-       if (ret) {
-               goto out;
+       ret = _pam_winbind_init_context(pamh, flags, argc, argv,
+                                       PAM_WINBIND_ACCT_MGMT, &ctx);
+       if (ret != PAM_SUCCESS) {
+               return ret;
        }
 
        _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
@@ -2849,7 +2869,7 @@ int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
                pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
                             (const void **)&tmp);
                if (tmp != NULL) {
-                       ret = atoi((const char *)tmp);
+                       ret = atoi(tmp);
                        switch (ret) {
                        case PAM_AUTHTOK_EXPIRED:
                                /* fall through, since new token is required in this case */
@@ -2906,9 +2926,10 @@ int pam_sm_open_session(pam_handle_t *pamh, int flags,
        int ret = PAM_SUCCESS;
        struct pwb_context *ctx = NULL;
 
-       ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
-       if (ret) {
-               goto out;
+       ret = _pam_winbind_init_context(pamh, flags, argc, argv,
+                                       PAM_WINBIND_OPEN_SESSION, &ctx);
+       if (ret != PAM_SUCCESS) {
+               return ret;
        }
 
        _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
@@ -2917,7 +2938,7 @@ int pam_sm_open_session(pam_handle_t *pamh, int flags,
                /* check and create homedir */
                ret = _pam_mkhomedir(ctx);
        }
- out:
+
        _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
 
        TALLOC_FREE(ctx);
@@ -2932,14 +2953,14 @@ int pam_sm_close_session(pam_handle_t *pamh, int flags,
        int ret = PAM_SUCCESS;
        struct pwb_context *ctx = NULL;
 
-       ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
-       if (ret) {
-               goto out;
+       ret = _pam_winbind_init_context(pamh, flags, argc, argv,
+                                       PAM_WINBIND_CLOSE_SESSION, &ctx);
+       if (ret != PAM_SUCCESS) {
+               return ret;
        }
 
        _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
 
-out:
        _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
 
        TALLOC_FREE(ctx);
@@ -2975,8 +2996,8 @@ static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
        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_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
+                     (const void **) &new_authtok_reqd_during_auth);
        pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
                     NULL, NULL);
 
@@ -3007,7 +3028,8 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
 
        /* <DO NOT free() THESE> */
        const char *user;
-       char *pass_old, *pass_new;
+       const char *pass_old;
+       const char *pass_new;
        /* </DO NOT free() THESE> */
 
        char *Announce;
@@ -3017,9 +3039,10 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
        struct wbcAuthErrorInfo *error = NULL;
        struct pwb_context *ctx = NULL;
 
-       ret = _pam_winbind_init_context(pamh, flags, argc, argv, &ctx);
-       if (ret) {
-               goto out;
+       ret = _pam_winbind_init_context(pamh, flags, argc, argv,
+                                       PAM_WINBIND_CHAUTHTOK, &ctx);
+       if (ret != PAM_SUCCESS) {
+               return ret;
        }
 
        _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
@@ -3033,7 +3056,7 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
         * First get the name of a user
         */
        ret = pam_get_user(pamh, &user, _("Username: "));
-       if (ret) {
+       if (ret != PAM_SUCCESS) {
                _pam_log(ctx, LOG_ERR,
                         "password - could not identify user");
                goto out;
@@ -3097,7 +3120,7 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
 
                ret = winbind_auth_request(ctx, user, pass_old,
                                           NULL, NULL, 0,
-                                          &error, NULL, NULL,
+                                          &error, NULL,
                                           &pwdlastset_prelim, NULL);
 
                if (ret != PAM_ACCT_EXPIRED &&
@@ -3130,7 +3153,7 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
                 * get the old token back.
                 */
 
-               ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
+               ret = pam_get_item(pamh, PAM_OLDAUTHTOK, (const void **) &pass_old);
 
                if (ret != PAM_SUCCESS) {
                        _pam_log(ctx, LOG_NOTICE,
@@ -3180,8 +3203,8 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
                 * 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);
+               pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
+                            (const void **) &pwdlastset_update);
 
                /*
                 * if cached creds were enabled, make sure to set the
@@ -3194,7 +3217,7 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
 
                ret = winbind_chauthtok_request(ctx, user, pass_old,
                                                pass_new, pwdlastset_update);
-               if (ret) {
+               if (ret != PAM_SUCCESS) {
                        pass_old = pass_new = NULL;
                        goto out;
                }
@@ -3205,7 +3228,6 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
                        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);
@@ -3221,7 +3243,7 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
 
                        ret = winbind_auth_request(ctx, user, pass_new,
                                                   member, cctype, 0,
-                                                  &error, &info, &policy,
+                                                  &error, &info,
                                                   NULL, &username_ret);
                        pass_old = pass_new = NULL;
 
@@ -3235,7 +3257,7 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
 
                                /* warn a user if the password is about to
                                 * expire soon */
-                               _pam_warn_password_expiry(ctx, user_info, policy,
+                               _pam_warn_password_expiry(ctx, user_info,
                                                          warn_pwd_expire,
                                                          NULL, NULL);
 
@@ -3261,7 +3283,6 @@ int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
                                wbcFreeMemory(info->blobs);
                        }
                        wbcFreeMemory(info);
-                       wbcFreeMemory(policy);
 
                        goto out;
                }