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-rw-r--r--src/providers/proxy/proxy.c2502
-rw-r--r--src/providers/proxy/proxy.h30
-rw-r--r--src/providers/proxy/proxy_child.c507
3 files changed, 3039 insertions, 0 deletions
diff --git a/src/providers/proxy/proxy.c b/src/providers/proxy/proxy.c
new file mode 100644
index 000000000..9a8dc4a26
--- /dev/null
+++ b/src/providers/proxy/proxy.c
@@ -0,0 +1,2502 @@
+/*
+ SSSD
+
+ Proxy Module
+
+ Copyright (C) Simo Sorce <ssorce@redhat.com> 2008-2009
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <nss.h>
+#include <errno.h>
+#include <pwd.h>
+#include <grp.h>
+#include <dlfcn.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include <security/pam_appl.h>
+#include <security/pam_modules.h>
+
+#include "util/util.h"
+#include "providers/dp_backend.h"
+#include "db/sysdb.h"
+#include "proxy.h"
+#include <dhash.h>
+
+struct proxy_nss_ops {
+ enum nss_status (*getpwnam_r)(const char *name, struct passwd *result,
+ char *buffer, size_t buflen, int *errnop);
+ enum nss_status (*getpwuid_r)(uid_t uid, struct passwd *result,
+ char *buffer, size_t buflen, int *errnop);
+ enum nss_status (*setpwent)(void);
+ enum nss_status (*getpwent_r)(struct passwd *result,
+ char *buffer, size_t buflen, int *errnop);
+ enum nss_status (*endpwent)(void);
+
+ enum nss_status (*getgrnam_r)(const char *name, struct group *result,
+ char *buffer, size_t buflen, int *errnop);
+ enum nss_status (*getgrgid_r)(gid_t gid, struct group *result,
+ char *buffer, size_t buflen, int *errnop);
+ enum nss_status (*setgrent)(void);
+ enum nss_status (*getgrent_r)(struct group *result,
+ char *buffer, size_t buflen, int *errnop);
+ enum nss_status (*endgrent)(void);
+ enum nss_status (*initgroups_dyn)(const char *user, gid_t group,
+ long int *start, long int *size,
+ gid_t **groups, long int limit,
+ int *errnop);
+};
+
+struct proxy_ctx {
+ struct be_ctx *be;
+ int entry_cache_timeout;
+ struct proxy_nss_ops ops;
+};
+
+struct proxy_auth_ctx {
+ struct be_ctx *be;
+ char *pam_target;
+
+ uint32_t max_children;
+ uint32_t running;
+ uint32_t next_id;
+ hash_table_t *request_table;
+ struct sbus_connection *sbus_srv;
+ int timeout_ms;
+};
+
+static int client_registration(DBusMessage *message,
+ struct sbus_connection *conn);
+
+static struct sbus_method proxy_methods[] = {
+ { DP_METHOD_REGISTER, client_registration },
+ { NULL, NULL }
+};
+
+struct sbus_interface proxy_interface = {
+ DP_INTERFACE,
+ DP_PATH,
+ SBUS_DEFAULT_VTABLE,
+ proxy_methods,
+ NULL
+};
+
+struct authtok_conv {
+ uint32_t authtok_size;
+ uint8_t *authtok;
+};
+
+struct proxy_client_ctx {
+ struct be_req *be_req;
+ struct proxy_auth_ctx *auth_ctx;
+};
+
+static void proxy_reply(struct be_req *req, int dp_err,
+ int error, const char *errstr);
+
+static struct tevent_req *proxy_child_send(TALLOC_CTX *mem_ctx,
+ struct proxy_auth_ctx *ctx,
+ struct be_req *be_req);
+static void proxy_child_done(struct tevent_req *child_req);
+static void proxy_pam_handler(struct be_req *req) {
+ struct pam_data *pd;
+ struct proxy_auth_ctx *ctx;
+ struct tevent_req *child_req = NULL;
+ struct proxy_client_ctx *client_ctx;
+
+ pd = talloc_get_type(req->req_data, struct pam_data);
+
+ switch (pd->cmd) {
+ case SSS_PAM_AUTHENTICATE:
+ ctx = talloc_get_type(req->be_ctx->bet_info[BET_AUTH].pvt_bet_data,
+ struct proxy_auth_ctx);
+ break;
+ case SSS_PAM_CHAUTHTOK:
+ case SSS_PAM_CHAUTHTOK_PRELIM:
+ ctx = talloc_get_type(req->be_ctx->bet_info[BET_CHPASS].pvt_bet_data,
+ struct proxy_auth_ctx);
+ break;
+ case SSS_PAM_ACCT_MGMT:
+ ctx = talloc_get_type(req->be_ctx->bet_info[BET_ACCESS].pvt_bet_data,
+ struct proxy_auth_ctx);
+ break;
+ case SSS_PAM_SETCRED:
+ case SSS_PAM_OPEN_SESSION:
+ case SSS_PAM_CLOSE_SESSION:
+ pd->pam_status = PAM_SUCCESS;
+ proxy_reply(req, DP_ERR_OK, EOK, NULL);
+ return;
+ default:
+ DEBUG(1, ("Unsupported PAM task.\n"));
+ pd->pam_status = PAM_MODULE_UNKNOWN;
+ proxy_reply(req, DP_ERR_OK, EINVAL, "Unsupported PAM task");
+ return;
+ }
+
+ client_ctx = talloc(req, struct proxy_client_ctx);
+ if (client_ctx == NULL) {
+ proxy_reply(req, DP_ERR_FATAL, ENOMEM, NULL);
+ return;
+ }
+ client_ctx->auth_ctx = ctx;
+ client_ctx->be_req = req;
+
+ /* Queue the request and spawn a child if there
+ * is an available slot.
+ */
+ child_req = proxy_child_send(req, ctx, req);
+ if (child_req == NULL) {
+ /* Could not queue request
+ * Return an error
+ */
+ proxy_reply(req, DP_ERR_FATAL, EINVAL, "Could not queue request\n");
+ return;
+ }
+ tevent_req_set_callback(child_req, proxy_child_done, client_ctx);
+ return;
+}
+
+struct pc_init_ctx;
+struct proxy_child_ctx {
+ struct proxy_auth_ctx *auth_ctx;
+ struct be_req *be_req;
+ struct pam_data *pd;
+
+ uint32_t id;
+ pid_t pid;
+ bool running;
+
+ struct sbus_connection *conn;
+ struct tevent_timer *timer;
+
+ struct tevent_req *init_req;
+};
+
+static int proxy_child_destructor(TALLOC_CTX *ctx)
+{
+ struct proxy_child_ctx *child_ctx =
+ talloc_get_type(ctx, struct proxy_child_ctx);
+ hash_key_t key;
+
+ DEBUG(8, ("Removing proxy child id [%d]\n", child_ctx->id));
+ key.type = HASH_KEY_ULONG;
+ key.ul = child_ctx->id;
+ hash_delete(child_ctx->auth_ctx->request_table, &key);
+ return 0;
+}
+
+static struct tevent_req *proxy_child_init_send(TALLOC_CTX *mem_ctx,
+ struct proxy_child_ctx *child_ctx,
+ struct proxy_auth_ctx *auth_ctx);
+static void proxy_child_init_done(struct tevent_req *subreq);
+static struct tevent_req *proxy_child_send(TALLOC_CTX *mem_ctx,
+ struct proxy_auth_ctx *auth_ctx,
+ struct be_req *be_req)
+{
+ struct tevent_req *req;
+ struct tevent_req *subreq;
+ struct proxy_child_ctx *state;
+ int hret;
+ hash_key_t key;
+ hash_value_t value;
+ uint32_t first;
+
+ req = tevent_req_create(mem_ctx, &state, struct proxy_child_ctx);
+ if (req == NULL) {
+ DEBUG(1, ("Could not send PAM request to child\n"));
+ return NULL;
+ }
+
+ state->be_req = be_req;
+ state->auth_ctx = auth_ctx;
+ state->pd = talloc_get_type(be_req->req_data, struct pam_data);
+
+ /* Find an available key */
+ key.type = HASH_KEY_ULONG;
+ key.ul = auth_ctx->next_id;
+
+ first = auth_ctx->next_id;
+ while (auth_ctx->next_id == 0 ||
+ hash_has_key(auth_ctx->request_table, &key)) {
+ /* Handle overflow, zero is a reserved value
+ * Also handle the unlikely case where the next ID
+ * is still awaiting being run
+ */
+ auth_ctx->next_id++;
+ key.ul = auth_ctx->next_id;
+
+ if (auth_ctx->next_id == first) {
+ /* We've looped through all possible integers! */
+ DEBUG(0, ("Serious error: queue is too long!\n"));
+ talloc_zfree(req);
+ return NULL;
+ }
+ }
+
+ state->id = auth_ctx->next_id;
+ auth_ctx->next_id++;
+
+ value.type = HASH_VALUE_PTR;
+ value.ptr = req;
+ DEBUG(8, ("Queueing request [%d]\n", key.ul));
+ hret = hash_enter(auth_ctx->request_table,
+ &key, &value);
+ if (hret != HASH_SUCCESS) {
+ DEBUG(1, ("Could not add request to the queue\n"));
+ talloc_zfree(req);
+ return NULL;
+ }
+
+ talloc_set_destructor((TALLOC_CTX *) state,
+ proxy_child_destructor);
+
+ if (auth_ctx->running < auth_ctx->max_children) {
+ /* There's an available slot; start a child
+ * to handle the request
+ */
+
+ auth_ctx->running++;
+ subreq = proxy_child_init_send(auth_ctx, state, auth_ctx);
+ if (!subreq) {
+ DEBUG(1, ("Could not fork child process\n"));
+ auth_ctx->running--;
+ talloc_zfree(req);
+ return NULL;
+ }
+ tevent_req_set_callback(subreq, proxy_child_init_done, req);
+
+ state->running = true;
+ }
+ else {
+ /* If there was no available slot, it will be queued
+ * until a slot is available
+ */
+ DEBUG(8, ("All available child slots are full, queuing request\n"));
+ }
+ return req;
+}
+
+struct pc_init_ctx {
+ char *command;
+ pid_t pid;
+ struct tevent_timer *timeout;
+ struct tevent_signal *sige;
+ struct proxy_child_ctx *child_ctx;
+ struct sbus_connection *conn;
+};
+
+static int pc_init_destructor (TALLOC_CTX *ctx)
+{
+ struct pc_init_ctx *init_ctx =
+ talloc_get_type(ctx, struct pc_init_ctx);
+
+ /* If the init request has died, forcibly kill the child */
+ kill(init_ctx->pid, SIGKILL);
+ return 0;
+}
+
+static void pc_init_sig_handler(struct tevent_context *ev,
+ struct tevent_signal *sige, int signum,
+ int count, void *__siginfo, void *pvt);
+static void pc_init_timeout(struct tevent_context *ev,
+ struct tevent_timer *te,
+ struct timeval t, void *ptr);
+static struct tevent_req *proxy_child_init_send(TALLOC_CTX *mem_ctx,
+ struct proxy_child_ctx *child_ctx,
+ struct proxy_auth_ctx *auth_ctx)
+{
+ struct tevent_req *req;
+ struct pc_init_ctx *state;
+ char **proxy_child_args;
+ struct timeval tv;
+ errno_t ret;
+ pid_t pid;
+
+ req = tevent_req_create(mem_ctx, &state, struct pc_init_ctx);
+ if (req == NULL) {
+ DEBUG(1, ("Could not create tevent_req\n"));
+ return NULL;
+ }
+
+ state->child_ctx = child_ctx;
+
+ state->command = talloc_asprintf(req,
+ "%s/proxy_child -d %d%s%s --domain %s --id %d",
+ SSSD_LIBEXEC_PATH, debug_level,
+ (debug_timestamps ? "" : " --debug-timestamps=0"),
+ (debug_to_file ? " --debug-to-files" : ""),
+ auth_ctx->be->domain->name,
+ child_ctx->id);
+ if (state->command == NULL) {
+ DEBUG(1, ("talloc_asprintf failed.\n"));
+ return NULL;
+ }
+
+ DEBUG(7, ("Starting proxy child with args [%s]\n", state->command));
+
+ pid = fork();
+ if (pid < 0) {
+ ret = errno;
+ DEBUG(1, ("fork failed [%d][%s].\n", ret, strerror(ret)));
+ talloc_zfree(req);
+ return NULL;
+ }
+
+ if (pid == 0) { /* child */
+ proxy_child_args = parse_args(state->command);
+ execvp(proxy_child_args[0], proxy_child_args);
+
+ ret = errno;
+ DEBUG(0, ("Could not start proxy child [%s]: [%d][%s].\n",
+ state->command, ret, strerror(ret)));
+
+ _exit(1);
+ }
+
+ else { /* parent */
+ state->pid = pid;
+ /* Make sure to kill the child process if we abort */
+ talloc_set_destructor((TALLOC_CTX *)state, pc_init_destructor);
+
+ state->sige = tevent_add_signal(auth_ctx->be->ev, req,
+ SIGCHLD, SA_SIGINFO,
+ pc_init_sig_handler, req);
+ if (state->sige == NULL) {
+ DEBUG(1, ("tevent_add_signal failed.\n"));
+ talloc_zfree(req);
+ return NULL;
+ }
+
+ /* Save the init request to the child context.
+ * This is technically a layering violation,
+ * but it's the only sane way to be able to
+ * identify which client is which when it
+ * connects to the backend in
+ * client_registration()
+ */
+ child_ctx->init_req = req;
+
+ /* Wait six seconds for the child to connect
+ * This is because the connection handler will add
+ * its own five-second timeout, and we don't want to
+ * be faster here.
+ */
+ tv = tevent_timeval_current_ofs(6, 0);
+ state->timeout = tevent_add_timer(auth_ctx->be->ev, req,
+ tv, pc_init_timeout, req);
+
+ /* processing will continue once the connection is received
+ * in proxy_client_init()
+ */
+ return req;
+ }
+}
+
+static void pc_init_sig_handler(struct tevent_context *ev,
+ struct tevent_signal *sige, int signum,
+ int count, void *__siginfo, void *pvt)
+{
+ int ret;
+ int child_status;
+ struct tevent_req *req;
+ struct pc_init_ctx *init_ctx;
+
+ if (count <= 0) {
+ DEBUG(0, ("SIGCHLD handler called with invalid child count\n"));
+ return;
+ }
+
+ req = talloc_get_type(pvt, struct tevent_req);
+ init_ctx = tevent_req_data(req, struct pc_init_ctx);
+
+ DEBUG(7, ("Waiting for child [%d].\n", init_ctx->pid));
+
+ errno = 0;
+ ret = waitpid(init_ctx->pid, &child_status, WNOHANG);
+
+ if (ret == -1) {
+ ret = errno;
+ DEBUG(1, ("waitpid failed [%d][%s].\n", ret, strerror(ret)));
+ } else if (ret == 0) {
+ DEBUG(1, ("waitpid did not find a child with changed status.\n"));
+ } else {
+ if (WIFEXITED(child_status)) {
+ DEBUG(4, ("child [%d] exited with status [%d].\n", ret,
+ WEXITSTATUS(child_status)));
+ tevent_req_error(req, EIO);
+ } else if (WIFSIGNALED(child_status)) {
+ DEBUG(4, ("child [%d] was terminate by signal [%d].\n", ret,
+ WTERMSIG(child_status)));
+ tevent_req_error(req, EIO);
+ } else {
+ if (WIFSTOPPED(child_status)) {
+ DEBUG(1, ("child [%d] was stopped by signal [%d].\n", ret,
+ WSTOPSIG(child_status)));
+ }
+ if (WIFCONTINUED(child_status)) {
+ DEBUG(1, ("child [%d] was resumed by delivery of SIGCONT.\n",
+ ret));
+ }
+ DEBUG(1, ("Child is still running, no new child is started.\n"));
+ return;
+ }
+ }
+}
+
+static void pc_init_timeout(struct tevent_context *ev,
+ struct tevent_timer *te,
+ struct timeval t, void *ptr)
+{
+ struct tevent_req *req;
+ struct pc_init_ctx *state;
+
+ DEBUG(2, ("Client timed out before Identification!\n"));
+
+ req = talloc_get_type(ptr, struct tevent_req);
+ state = tevent_req_data(req, struct pc_init_ctx);
+
+ tevent_req_error(req, ETIMEDOUT);
+}
+
+static errno_t proxy_child_init_recv(struct tevent_req *req,
+ pid_t *pid,
+ struct sbus_connection **conn)
+{
+ struct pc_init_ctx *state;
+
+ TEVENT_REQ_RETURN_ON_ERROR(req);
+
+ state = tevent_req_data(req, struct pc_init_ctx);
+
+ /* Unset the destructor since we initialized successfully.
+ * We don't want to kill the child now that it's properly
+ * set up.
+ */
+ talloc_set_destructor((TALLOC_CTX *)state, NULL);
+
+ *pid = state->pid;
+ *conn = state->conn;
+
+ return EOK;
+}
+
+struct proxy_child_sig_ctx {
+ struct proxy_auth_ctx *auth_ctx;
+ pid_t pid;
+};
+static void proxy_child_sig_handler(struct tevent_context *ev,
+ struct tevent_signal *sige, int signum,
+ int count, void *__siginfo, void *pvt);
+static struct tevent_req *proxy_pam_conv_send(TALLOC_CTX *mem_ctx,
+ struct proxy_auth_ctx *auth_ctx,
+ struct sbus_connection *conn,
+ struct pam_data *pd,
+ pid_t pid);
+static void proxy_pam_conv_done(struct tevent_req *subreq);
+static void proxy_child_init_done(struct tevent_req *subreq) {
+ int ret;
+ struct tevent_signal *sige;
+ struct tevent_req *req =
+ tevent_req_callback_data(subreq, struct tevent_req);
+ struct proxy_child_ctx *child_ctx =
+ tevent_req_data(req, struct proxy_child_ctx);
+ struct proxy_child_sig_ctx *sig_ctx;
+
+ ret = proxy_child_init_recv(subreq, &child_ctx->pid, &child_ctx->conn);
+ talloc_zfree(subreq);
+ if (ret != EOK) {
+ DEBUG(6, ("Proxy child init failed [%d]\n", ret));
+ tevent_req_error(req, ret);
+ return;
+ }
+
+ /* An initialized child is available, awaiting the PAM command */
+ subreq = proxy_pam_conv_send(req, child_ctx->auth_ctx,
+ child_ctx->conn, child_ctx->pd,
+ child_ctx->pid);
+ if (!subreq) {
+ DEBUG(1,("Could not start PAM conversation\n"));
+ tevent_req_error(req, EIO);
+ return;
+ }
+ tevent_req_set_callback(subreq, proxy_pam_conv_done, req);
+
+ /* Add a signal handler for the child under the auth_ctx,
+ * that way if the child exits after completion of the
+ * request, it will still be handled.
+ */
+ sig_ctx = talloc_zero(child_ctx->auth_ctx, struct proxy_child_sig_ctx);
+ if(sig_ctx == NULL) {
+ DEBUG(1, ("tevent_add_signal failed.\n"));
+ tevent_req_error(req, ENOMEM);
+ return;
+ }
+ sig_ctx->auth_ctx = child_ctx->auth_ctx;
+ sig_ctx->pid = child_ctx->pid;
+
+ sige = tevent_add_signal(child_ctx->auth_ctx->be->ev,
+ child_ctx->auth_ctx,
+ SIGCHLD, SA_SIGINFO,
+ proxy_child_sig_handler,
+ sig_ctx);
+ if (sige == NULL) {
+ DEBUG(1, ("tevent_add_signal failed.\n"));
+ tevent_req_error(req, ENOMEM);
+ return;
+ }
+
+ /* Steal the signal context onto the signal event
+ * so that when the signal is freed, the context
+ * will go with it.
+ */
+ talloc_steal(sige, sig_ctx);
+}
+
+static void remove_sige(struct tevent_context *ev,
+ struct tevent_immediate *imm,
+ void *pvt);
+static void run_proxy_child_queue(struct tevent_context *ev,
+ struct tevent_immediate *imm,
+ void *pvt);
+static void proxy_child_sig_handler(struct tevent_context *ev,
+ struct tevent_signal *sige, int signum,
+ int count, void *__siginfo, void *pvt)
+{
+ int ret;
+ int child_status;
+ struct proxy_child_sig_ctx *sig_ctx;
+ struct tevent_immediate *imm;
+ struct tevent_immediate *imm2;
+
+ if (count <= 0) {
+ DEBUG(0, ("SIGCHLD handler called with invalid child count\n"));
+ return;
+ }
+
+ sig_ctx = talloc_get_type(pvt, struct proxy_child_sig_ctx);
+ DEBUG(7, ("Waiting for child [%d].\n", sig_ctx->pid));
+
+ errno = 0;
+ ret = waitpid(sig_ctx->pid, &child_status, WNOHANG);
+
+ if (ret == -1) {
+ ret = errno;
+ DEBUG(1, ("waitpid failed [%d][%s].\n", ret, strerror(ret)));
+ } else if (ret == 0) {
+ DEBUG(1, ("waitpid did not found a child with changed status.\n"));
+ } else {
+ if (WIFEXITED(child_status)) {
+ DEBUG(4, ("child [%d] exited with status [%d].\n", ret,
+ WEXITSTATUS(child_status)));
+ } else if (WIFSIGNALED(child_status)) {
+ DEBUG(4, ("child [%d] was terminated by signal [%d].\n", ret,
+ WTERMSIG(child_status)));
+ } else {
+ if (WIFSTOPPED(child_status)) {
+ DEBUG(1, ("child [%d] was stopped by signal [%d].\n", ret,
+ WSTOPSIG(child_status)));
+ }
+ if (WIFCONTINUED(child_status)) {
+ DEBUG(1, ("child [%d] was resumed by delivery of SIGCONT.\n",
+ ret));
+ }
+ DEBUG(1, ("Child is still running, no new child is started.\n"));
+ return;
+ }
+
+ imm = tevent_create_immediate(ev);
+ if (imm == NULL) {
+ DEBUG(1, ("tevent_create_immediate failed.\n"));
+ return;
+ }
+
+ tevent_schedule_immediate(imm, ev, run_proxy_child_queue,
+ sig_ctx->auth_ctx);
+
+ /* schedule another immediate timer to delete the sigchld handler */
+ imm2 = tevent_create_immediate(ev);
+ if (imm == NULL) {
+ DEBUG(1, ("tevent_create_immediate failed.\n"));
+ return;
+ }
+
+ tevent_schedule_immediate(imm2, ev, remove_sige, sige);
+ }
+
+ return;
+}
+
+static void remove_sige(struct tevent_context *ev,
+ struct tevent_immediate *imm,
+ void *pvt)
+{
+ talloc_free(pvt);
+}
+
+struct proxy_conv_ctx {
+ struct proxy_auth_ctx *auth_ctx;
+ struct sbus_connection *conn;
+ struct pam_data *pd;
+ pid_t pid;
+};
+static void proxy_pam_conv_reply(DBusPendingCall *pending, void *ptr);
+static struct tevent_req *proxy_pam_conv_send(TALLOC_CTX *mem_ctx,
+ struct proxy_auth_ctx *auth_ctx,
+ struct sbus_connection *conn,
+ struct pam_data *pd,
+ pid_t pid)
+{
+ errno_t ret;
+ bool dp_ret;
+ DBusMessage *msg;
+ struct tevent_req *req;
+ struct proxy_conv_ctx *state;
+
+ req = tevent_req_create(mem_ctx, &state, struct proxy_conv_ctx);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ state->auth_ctx = auth_ctx;
+ state->conn = conn;
+ state->pd = pd;
+ state->pid = pid;
+
+ msg = dbus_message_new_method_call(NULL,
+ DP_PATH,
+ DP_INTERFACE,
+ DP_METHOD_PAMHANDLER);
+ if (msg == NULL) {
+ DEBUG(1, ("dbus_message_new_method_call failed.\n"));
+ talloc_zfree(req);
+ return NULL;
+ }
+
+ DEBUG(4, ("Sending request with the following data:\n"));
+ DEBUG_PAM_DATA(4, pd);
+
+ dp_ret = dp_pack_pam_request(msg, pd);
+ if (!dp_ret) {
+ DEBUG(1, ("Failed to build message\n"));
+ dbus_message_unref(msg);
+ talloc_zfree(req);
+ return NULL;
+ }
+
+ ret = sbus_conn_send(state->conn, msg, state->auth_ctx->timeout_ms,
+ proxy_pam_conv_reply, req, NULL);
+ if (ret != EOK) {
+ dbus_message_unref(msg);
+ talloc_zfree(req);
+ return NULL;
+ }
+
+ dbus_message_unref(msg);
+ return req;
+}
+
+static void proxy_pam_conv_reply(DBusPendingCall *pending, void *ptr)
+{
+ struct tevent_req *req;
+ struct proxy_conv_ctx *state;
+ DBusError dbus_error;
+ DBusMessage *reply;
+ int type;
+ int ret;
+
+ DEBUG(8, ("Handling pam conversation reply\n"));
+
+ req = talloc_get_type(ptr, struct tevent_req);
+ state = tevent_req_data(req, struct proxy_conv_ctx);
+
+ dbus_error_init(&dbus_error);
+
+ reply = dbus_pending_call_steal_reply(pending);
+ dbus_pending_call_unref(pending);
+ if (reply == NULL) {
+ DEBUG(0, ("Severe error. A reply callback was called but no reply was"
+ "received and no timeout occurred\n"));
+ state->pd->pam_status = PAM_SYSTEM_ERR;
+ tevent_req_error(req, EIO);
+ }
+
+ type = dbus_message_get_type(reply);
+ switch (type) {
+ case DBUS_MESSAGE_TYPE_METHOD_RETURN:
+ ret = dp_unpack_pam_response(reply, state->pd, &dbus_error);
+ if (!ret) {
+ DEBUG(0, ("Failed to parse reply.\n"));
+ state->pd->pam_status = PAM_SYSTEM_ERR;
+ dbus_message_unref(reply);
+ tevent_req_error(req, EIO);
+ return;
+ }
+ DEBUG(4, ("received: [%d][%s]\n",
+ state->pd->pam_status,
+ state->pd->domain));
+ break;
+ case DBUS_MESSAGE_TYPE_ERROR:
+ DEBUG(0, ("Reply error [%s].\n",
+ dbus_message_get_error_name(reply)));
+ state->pd->pam_status = PAM_SYSTEM_ERR;
+ break;
+ default:
+ DEBUG(0, ("Default... what now?.\n"));
+ state->pd->pam_status = PAM_SYSTEM_ERR;
+ }
+ dbus_message_unref(reply);
+
+ /* Kill the child */
+ kill(state->pid, SIGKILL);
+
+ /* Conversation is finished */
+ tevent_req_done(req);
+}
+
+static errno_t proxy_pam_conv_recv(struct tevent_req *req)
+{
+ TEVENT_REQ_RETURN_ON_ERROR(req);
+
+ return EOK;
+}
+
+static void proxy_pam_conv_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req;
+ int ret;
+
+ req = tevent_req_callback_data(subreq, struct tevent_req);
+
+ ret = proxy_pam_conv_recv(subreq);
+ talloc_zfree(subreq);
+ if (ret != EOK) {
+ DEBUG(6, ("Proxy PAM conversation failed [%d]\n", ret));
+ tevent_req_error(req, ret);
+ return;
+ }
+
+ tevent_req_done(req);
+}
+
+static int proxy_child_recv(struct tevent_req *req,
+ TALLOC_CTX *mem_ctx,
+ struct pam_data **pd)
+{
+ struct proxy_child_ctx *ctx;
+
+ TEVENT_REQ_RETURN_ON_ERROR(req);
+
+ ctx = tevent_req_data(req, struct proxy_child_ctx);
+ *pd = talloc_steal(mem_ctx, ctx->pd);
+
+ return EOK;
+}
+
+static void proxy_child_done(struct tevent_req *req)
+{
+ struct proxy_client_ctx *client_ctx =
+ tevent_req_callback_data(req, struct proxy_client_ctx);
+ struct pam_data *pd;
+ char *password;
+ int ret;
+ struct tevent_immediate *imm;
+
+ ret = proxy_child_recv(req, client_ctx, &pd);
+ talloc_zfree(req);
+ if (ret != EOK) {
+ /* Pam child failed */
+ client_ctx->auth_ctx->running--;
+ proxy_reply(client_ctx->be_req, DP_ERR_FATAL, ret,
+ "PAM child failed");
+
+ /* Start the next auth in the queue, if any */
+ imm = tevent_create_immediate(client_ctx->be_req->be_ctx->ev);
+ if (imm == NULL) {
+ DEBUG(1, ("tevent_create_immediate failed.\n"));
+ return;
+ }
+
+ tevent_schedule_immediate(imm,
+ client_ctx->be_req->be_ctx->ev,
+ run_proxy_child_queue,
+ client_ctx->auth_ctx);
+ return;
+ }
+
+ /* Check if we need to save the cached credentials */
+ if ((pd->cmd == SSS_PAM_AUTHENTICATE || pd->cmd == SSS_PAM_CHAUTHTOK) &&
+ pd->pam_status == PAM_SUCCESS &&
+ client_ctx->be_req->be_ctx->domain->cache_credentials) {
+ password = talloc_strndup(client_ctx->be_req,
+ (char *) pd->authtok,
+ pd->authtok_size);
+ if (!password) {
+ /* password caching failures are not fatal errors */
+ DEBUG(2, ("Failed to cache password\n"));
+ goto done;
+ }
+ talloc_set_destructor((TALLOC_CTX *)password, password_destructor);
+
+ ret = sysdb_cache_password(client_ctx,
+ client_ctx->be_req->be_ctx->sysdb,
+ client_ctx->be_req->be_ctx->domain,
+ pd->user, password);
+
+ /* password caching failures are not fatal errors */
+ /* so we just log it any return */
+ if (ret != EOK) {
+ DEBUG(2, ("Failed to cache password (%d)[%s]!?\n",
+ ret, strerror(ret)));
+ }
+ }
+
+done:
+ proxy_reply(client_ctx->be_req, DP_ERR_OK, EOK, NULL);
+}
+
+static void run_proxy_child_queue(struct tevent_context *ev,
+ struct tevent_immediate *imm,
+ void *pvt)
+{
+ struct proxy_auth_ctx *auth_ctx;
+ struct hash_iter_context_t *iter;
+ struct hash_entry_t *entry;
+ struct tevent_req *req;
+ struct tevent_req *subreq;
+ struct proxy_child_ctx *state;
+
+ auth_ctx = talloc_get_type(pvt, struct proxy_auth_ctx);
+
+ /* Launch next queued request */
+ iter = new_hash_iter_context(auth_ctx->request_table);
+ while ((entry = iter->next(iter)) != NULL) {
+ req = talloc_get_type(entry->value.ptr, struct tevent_req);
+ state = tevent_req_data(req, struct proxy_child_ctx);
+ if (!state->running) {
+ break;
+ }
+ }
+
+ if (!entry) {
+ /* Nothing pending on the queue */
+ return;
+ }
+
+ if (auth_ctx->running < auth_ctx->max_children) {
+ /* There's an available slot; start a child
+ * to handle the request
+ */
+ auth_ctx->running++;
+ subreq = proxy_child_init_send(auth_ctx, state, auth_ctx);
+ if (!subreq) {
+ DEBUG(1, ("Could not fork child process\n"));
+ auth_ctx->running--;
+ talloc_zfree(req);
+ return;
+ }
+ tevent_req_set_callback(subreq, proxy_child_init_done, req);
+
+ state->running = true;
+ }
+}
+
+static void proxy_reply(struct be_req *req, int dp_err,
+ int error, const char *errstr)
+{
+ if (!req->be_ctx->offstat.offline) {
+ /* This action took place online.
+ * Fire any online callbacks if necessary.
+ * Note: we're checking the offline value directly,
+ * because if the activity took a long time to
+ * complete, calling be_is_offline() might report false
+ * incorrectly.
+ */
+ be_run_online_cb(req->be_ctx);
+ }
+ return req->fn(req, dp_err, error, errstr);
+}
+
+/* =Common-proxy-tevent_req-utils=========================================*/
+
+#define DEFAULT_BUFSIZE 4096
+#define MAX_BUF_SIZE 1024*1024 /* max 1MiB */
+
+/* =Getpwnam-wrapper======================================================*/
+
+static int delete_user(TALLOC_CTX *mem_ctx, struct sysdb_ctx *sysdb,
+ struct sss_domain_info *domain, const char *name);
+
+static int get_pw_name(TALLOC_CTX *mem_ctx,
+ struct proxy_ctx *ctx,
+ struct sysdb_ctx *sysdb,
+ struct sss_domain_info *dom,
+ const char *name)
+{
+ TALLOC_CTX *tmpctx;
+ struct passwd *pwd;
+ enum nss_status status;
+ char *buffer;
+ size_t buflen;
+ int ret;
+
+ DEBUG(7, ("Searching user by name (%s)\n", name));
+
+ tmpctx = talloc_new(mem_ctx);
+ if (!tmpctx) {
+ return ENOMEM;
+ }
+
+ pwd = talloc_zero(tmpctx, struct passwd);
+ if (!pwd) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ buflen = DEFAULT_BUFSIZE;
+ buffer = talloc_size(tmpctx, buflen);
+ if (!buffer) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ /* FIXME: should we move this call outside the transaction to keep the
+ * transaction as short as possible ? */
+ status = ctx->ops.getpwnam_r(name, pwd, buffer, buflen, &ret);
+
+ switch (status) {
+ case NSS_STATUS_NOTFOUND:
+
+ DEBUG(7, ("User %s not found.\n", name));
+ ret = delete_user(tmpctx, sysdb, dom, name);
+ if (ret) {
+ goto done;
+ }
+ break;
+
+ case NSS_STATUS_SUCCESS:
+
+ DEBUG(7, ("User %s found: (%s, %d, %d)\n",
+ name, pwd->pw_name, pwd->pw_uid, pwd->pw_gid));
+
+ /* uid=0 or gid=0 are invalid values */
+ /* also check that the id is in the valid range for this domain */
+ if (OUT_OF_ID_RANGE(pwd->pw_uid, dom->id_min, dom->id_max) ||
+ OUT_OF_ID_RANGE(pwd->pw_gid, dom->id_min, dom->id_max)) {
+
+ DEBUG(2, ("User [%s] filtered out! (id out of range)\n", name));
+ ret = delete_user(tmpctx, sysdb, dom, name);
+ if (ret) {
+ goto done;
+ }
+ break;
+ }
+
+ ret = sysdb_store_user(tmpctx, sysdb, dom,
+ pwd->pw_name,
+ pwd->pw_passwd,
+ pwd->pw_uid,
+ pwd->pw_gid,
+ pwd->pw_gecos,
+ pwd->pw_dir,
+ pwd->pw_shell,
+ NULL, ctx->entry_cache_timeout);
+ if (ret) {
+ goto done;
+ }
+ break;
+
+ case NSS_STATUS_UNAVAIL:
+ /* "remote" backend unavailable. Enter offline mode */
+ ret = ENXIO;
+ goto done;
+
+ default:
+ ret = EIO;
+ goto done;
+ }
+
+done:
+ talloc_zfree(tmpctx);
+ if (ret) {
+ DEBUG(2, ("proxy -> getpwnam_r failed for '%s' <%d>\n",
+ name, status));
+ }
+ return ret;
+}
+
+static int delete_user(TALLOC_CTX *mem_ctx, struct sysdb_ctx *sysdb,
+ struct sss_domain_info *domain, const char *name)
+{
+ struct ldb_dn *dn;
+
+ DEBUG(7, ("User %s does not exist (or is invalid) on remote server,"
+ " deleting!\n", name));
+
+ dn = sysdb_user_dn(sysdb, mem_ctx, domain->name, name);
+ if (!dn) {
+ return ENOMEM;
+ }
+
+ return sysdb_delete_entry(sysdb, dn, true);
+}
+
+/* =Getpwuid-wrapper======================================================*/
+
+static int get_pw_uid(TALLOC_CTX *mem_ctx,
+ struct proxy_ctx *ctx,
+ struct sysdb_ctx *sysdb,
+ struct sss_domain_info *dom,
+ uid_t uid)
+{
+ TALLOC_CTX *tmpctx;
+ struct passwd *pwd;
+ enum nss_status status;
+ char *buffer;
+ size_t buflen;
+ bool del_user = false;
+ int ret;
+
+ DEBUG(7, ("Searching user by uid (%d)\n", uid));
+
+ tmpctx = talloc_new(mem_ctx);
+ if (!tmpctx) {
+ return ENOMEM;
+ }
+
+ pwd = talloc_zero(tmpctx, struct passwd);
+ if (!pwd) {
+ ret = ENOMEM;
+ DEBUG(1, ("proxy -> getpwuid_r failed for '%d': [%d] %s\n",
+ uid, ret, strerror(ret)));
+ return ret;
+ }
+
+ buflen = DEFAULT_BUFSIZE;
+ buffer = talloc_size(tmpctx, buflen);
+ if (!buffer) {
+ ret = ENOMEM;
+ DEBUG(1, ("proxy -> getpwuid_r failed for '%d': [%d] %s\n",
+ uid, ret, strerror(ret)));
+ return ret;
+ }
+
+ status = ctx->ops.getpwuid_r(uid, pwd, buffer, buflen, &ret);
+
+ switch (status) {
+ case NSS_STATUS_NOTFOUND:
+
+ DEBUG(7, ("User %d not found.\n", uid));
+ del_user = true;
+ break;
+
+ case NSS_STATUS_SUCCESS:
+
+ DEBUG(7, ("User %d found (%s, %d, %d)\n",
+ uid, pwd->pw_name, pwd->pw_uid, pwd->pw_gid));
+
+ /* uid=0 or gid=0 are invalid values */
+ /* also check that the id is in the valid range for this domain */
+ if (OUT_OF_ID_RANGE(pwd->pw_uid, dom->id_min, dom->id_max) ||
+ OUT_OF_ID_RANGE(pwd->pw_gid, dom->id_min, dom->id_max)) {
+
+ DEBUG(2, ("User [%s] filtered out! (id out of range)\n",
+ pwd->pw_name));
+ del_user = true;
+ break;
+ }
+
+ ret = sysdb_store_user(tmpctx, sysdb, dom,
+ pwd->pw_name,
+ pwd->pw_passwd,
+ pwd->pw_uid,
+ pwd->pw_gid,
+ pwd->pw_gecos,
+ pwd->pw_dir,
+ pwd->pw_shell,
+ NULL, ctx->entry_cache_timeout);
+ if (ret) {
+ goto done;
+ }
+ break;
+
+ case NSS_STATUS_UNAVAIL:
+ /* "remote" backend unavailable. Enter offline mode */
+ ret = ENXIO;
+ goto done;
+
+ default:
+ ret = EIO;
+ goto done;
+ }
+
+ if (del_user) {
+ DEBUG(7, ("User %d does not exist (or is invalid) on remote server,"
+ " deleting!\n", uid));
+
+ ret = sysdb_delete_user(tmpctx, sysdb, dom, NULL, uid);
+ if (ret) {
+ goto done;
+ }
+ }
+
+done:
+ talloc_zfree(tmpctx);
+ if (ret) {
+ DEBUG(2, ("proxy -> getpwuid_r failed for '%d' <%d>\n", uid, status));
+ }
+ return ret;
+}
+
+/* =Getpwent-wrapper======================================================*/
+
+static int enum_users(TALLOC_CTX *mem_ctx,
+ struct proxy_ctx *ctx,
+ struct sysdb_ctx *sysdb,
+ struct sss_domain_info *dom)
+{
+ TALLOC_CTX *tmpctx;
+ bool in_transaction = false;
+ struct passwd *pwd;
+ enum nss_status status;
+ size_t buflen;
+ char *buffer;
+ char *newbuf;
+ int ret;
+
+ DEBUG(7, ("Enumerating users\n"));
+
+ tmpctx = talloc_new(mem_ctx);
+ if (!tmpctx) {
+ return ENOMEM;
+ }
+
+ pwd = talloc_zero(tmpctx, struct passwd);
+ if (!pwd) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ buflen = DEFAULT_BUFSIZE;
+ buffer = talloc_size(tmpctx, buflen);
+ if (!buffer) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ ret = sysdb_transaction_start(sysdb);
+ if (ret) {
+ goto done;
+ }
+ in_transaction = true;
+
+ status = ctx->ops.setpwent();
+ if (status != NSS_STATUS_SUCCESS) {
+ ret = EIO;
+ goto done;
+ }
+
+again:
+ /* always zero out the pwd structure */
+ memset(pwd, 0, sizeof(struct passwd));
+
+ /* get entry */
+ status = ctx->ops.getpwent_r(pwd, buffer, buflen, &ret);
+
+ switch (status) {
+ case NSS_STATUS_TRYAGAIN:
+ /* buffer too small ? */
+ if (buflen < MAX_BUF_SIZE) {
+ buflen *= 2;
+ }
+ if (buflen > MAX_BUF_SIZE) {
+ buflen = MAX_BUF_SIZE;
+ }
+ newbuf = talloc_realloc_size(tmpctx, buffer, buflen);
+ if (!newbuf) {
+ ret = ENOMEM;
+ goto done;
+ }
+ buffer = newbuf;
+ goto again;
+
+ case NSS_STATUS_NOTFOUND:
+
+ /* we are done here */
+ DEBUG(7, ("Enumeration completed.\n"));
+
+ ret = sysdb_transaction_commit(sysdb);
+ in_transaction = false;
+ break;
+
+ case NSS_STATUS_SUCCESS:
+
+ DEBUG(7, ("User found (%s, %d, %d)\n",
+ pwd->pw_name, pwd->pw_uid, pwd->pw_gid));
+
+ /* uid=0 or gid=0 are invalid values */
+ /* also check that the id is in the valid range for this domain */
+ if (OUT_OF_ID_RANGE(pwd->pw_uid, dom->id_min, dom->id_max) ||
+ OUT_OF_ID_RANGE(pwd->pw_gid, dom->id_min, dom->id_max)) {
+
+ DEBUG(2, ("User [%s] filtered out! (id out of range)\n",
+ pwd->pw_name));
+
+ goto again; /* skip */
+ }
+
+ ret = sysdb_store_user(tmpctx, sysdb, dom,
+ pwd->pw_name,
+ pwd->pw_passwd,
+ pwd->pw_uid,
+ pwd->pw_gid,
+ pwd->pw_gecos,
+ pwd->pw_dir,
+ pwd->pw_shell,
+ NULL, ctx->entry_cache_timeout);
+ if (ret) {
+ /* Do not fail completely on errors.
+ * Just report the failure to save and go on */
+ DEBUG(2, ("Failed to store user %s. Ignoring.\n",
+ pwd->pw_name));
+ }
+ goto again; /* next */
+
+ case NSS_STATUS_UNAVAIL:
+ /* "remote" backend unavailable. Enter offline mode */
+ ret = ENXIO;
+ break;
+
+ default:
+ DEBUG(2, ("proxy -> getpwent_r failed (%d)[%s]\n",
+ ret, strerror(ret)));
+ break;
+ }
+
+done:
+ talloc_zfree(tmpctx);
+ if (in_transaction) {
+ sysdb_transaction_cancel(sysdb);
+ }
+ ctx->ops.endpwent();
+ return ret;
+}
+
+/* =Getgrnam-wrapper======================================================*/
+
+#define DEBUG_GR_MEM(level, grp) \
+ do { \
+ if (debug_level >= level) { \
+ if (!grp->gr_mem || !grp->gr_mem[0]) { \
+ DEBUG(level, ("Group %s has no members!\n", \
+ grp->gr_name)); \
+ } else { \
+ int i = 0; \
+ while (grp->gr_mem[i]) { \
+ /* count */ \
+ i++; \
+ } \
+ DEBUG(level, ("Group %s has %d members!\n", \
+ grp->gr_name, i)); \
+ } \
+ } \
+ } while(0)
+
+static int get_gr_name(TALLOC_CTX *mem_ctx,
+ struct proxy_ctx *ctx,
+ struct sysdb_ctx *sysdb,
+ struct sss_domain_info *dom,
+ const char *name)
+{
+ TALLOC_CTX *tmpctx;
+ struct group *grp;
+ enum nss_status status;
+ char *buffer;
+ char *newbuf;
+ size_t buflen;
+ bool delete_group = false;
+ struct sysdb_attrs *members;
+ int ret;
+
+ DEBUG(7, ("Searching group by name (%s)\n", name));
+
+ tmpctx = talloc_new(mem_ctx);
+ if (!tmpctx) {
+ return ENOMEM;
+ }
+
+ grp = talloc(tmpctx, struct group);
+ if (!grp) {
+ ret = ENOMEM;
+ DEBUG(1, ("proxy -> getgrnam_r failed for '%s': [%d] %s\n",
+ name, ret, strerror(ret)));
+ return ret;
+ }
+
+ buflen = DEFAULT_BUFSIZE;
+ buffer = talloc_size(tmpctx, buflen);
+ if (!buffer) {
+ ret = ENOMEM;
+ DEBUG(1, ("proxy -> getgrnam_r failed for '%s': [%d] %s\n",
+ name, ret, strerror(ret)));
+ return ret;
+ }
+
+ /* FIXME: should we move this call outside the transaction to keep the
+ * transaction as short as possible ? */
+again:
+ /* always zero out the grp structure */
+ memset(grp, 0, sizeof(struct group));
+
+ status = ctx->ops.getgrnam_r(name, grp, buffer, buflen, &ret);
+
+ switch (status) {
+ case NSS_STATUS_TRYAGAIN:
+ /* buffer too small ? */
+ if (buflen < MAX_BUF_SIZE) {
+ buflen *= 2;
+ }
+ if (buflen > MAX_BUF_SIZE) {
+ buflen = MAX_BUF_SIZE;
+ }
+ newbuf = talloc_realloc_size(tmpctx, buffer, buflen);
+ if (!newbuf) {
+ ret = ENOMEM;
+ goto done;
+ }
+ buffer = newbuf;
+ goto again;
+
+ case NSS_STATUS_NOTFOUND:
+
+ DEBUG(7, ("Group %s not found.\n", name));
+ delete_group = true;
+ break;
+
+ case NSS_STATUS_SUCCESS:
+
+ DEBUG(7, ("Group %s found: (%s, %d)\n",
+ name, grp->gr_name, grp->gr_gid));
+
+ /* gid=0 is an invalid value */
+ /* also check that the id is in the valid range for this domain */
+ if (OUT_OF_ID_RANGE(grp->gr_gid, dom->id_min, dom->id_max)) {
+
+ DEBUG(2, ("Group [%s] filtered out! (id out of range)\n",
+ name));
+ delete_group = true;
+ break;
+ }
+
+ DEBUG_GR_MEM(7, grp);
+
+ if (grp->gr_mem && grp->gr_mem[0]) {
+ members = sysdb_new_attrs(tmpctx);
+ if (!members) {
+ ret = ENOMEM;
+ goto done;
+ }
+ ret = sysdb_attrs_users_from_str_list(members, SYSDB_MEMBER,
+ dom->name,
+ (const char **)grp->gr_mem);
+ if (ret) {
+ goto done;
+ }
+ } else {
+ members = NULL;
+ }
+
+ ret = sysdb_store_group(tmpctx, sysdb, dom,
+ grp->gr_name,
+ grp->gr_gid,
+ members,
+ ctx->entry_cache_timeout);
+ if (ret) {
+ goto done;
+ }
+ break;
+
+ case NSS_STATUS_UNAVAIL:
+ /* "remote" backend unavailable. Enter offline mode */
+ ret = ENXIO;
+ goto done;
+
+ default:
+ goto done;
+ }
+
+ if (delete_group) {
+ struct ldb_dn *dn;
+
+ DEBUG(7, ("Group %s does not exist (or is invalid) on remote server,"
+ " deleting!\n", name));
+
+ dn = sysdb_group_dn(sysdb, tmpctx, dom->name, name);
+ if (!dn) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ ret = sysdb_delete_entry(sysdb, dn, true);
+ if (ret) {
+ goto done;
+ }
+ }
+
+done:
+ talloc_zfree(tmpctx);
+ if (ret) {
+ DEBUG(2, ("proxy -> getgrnam_r failed for '%s' <%d>\n",
+ name, status));
+ }
+ return ret;
+}
+
+/* =Getgrgid-wrapper======================================================*/
+
+static int get_gr_gid(TALLOC_CTX *mem_ctx,
+ struct proxy_ctx *ctx,
+ struct sysdb_ctx *sysdb,
+ struct sss_domain_info *dom,
+ gid_t gid)
+{
+ TALLOC_CTX *tmpctx;
+ struct group *grp;
+ enum nss_status status;
+ char *buffer;
+ char *newbuf;
+ size_t buflen;
+ bool delete_group = false;
+ struct sysdb_attrs *members;
+ int ret;
+
+ DEBUG(7, ("Searching group by gid (%d)\n", gid));
+
+ tmpctx = talloc_new(mem_ctx);
+ if (!tmpctx) {
+ return ENOMEM;
+ }
+
+ grp = talloc(tmpctx, struct group);
+ if (!grp) {
+ ret = ENOMEM;
+ DEBUG(1, ("proxy -> getgrgid_r failed for '%d': [%d] %s\n",
+ gid, ret, strerror(ret)));
+ return ret;
+ }
+
+ buflen = DEFAULT_BUFSIZE;
+ buffer = talloc_size(tmpctx, buflen);
+ if (!buffer) {
+ ret = ENOMEM;
+ DEBUG(1, ("proxy -> getgrgid_r failed for '%d': [%d] %s\n",
+ gid, ret, strerror(ret)));
+ return ret;
+ }
+
+again:
+ /* always zero out the group structure */
+ memset(grp, 0, sizeof(struct group));
+
+ status = ctx->ops.getgrgid_r(gid, grp, buffer, buflen, &ret);
+
+ switch (status) {
+ case NSS_STATUS_TRYAGAIN:
+ /* buffer too small ? */
+ if (buflen < MAX_BUF_SIZE) {
+ buflen *= 2;
+ }
+ if (buflen > MAX_BUF_SIZE) {
+ buflen = MAX_BUF_SIZE;
+ }
+ newbuf = talloc_realloc_size(tmpctx, buffer, buflen);
+ if (!newbuf) {
+ ret = ENOMEM;
+ goto done;
+ }
+ buffer = newbuf;
+ goto again;
+
+ case NSS_STATUS_NOTFOUND:
+
+ DEBUG(7, ("Group %d not found.\n", gid));
+ delete_group = true;
+ break;
+
+ case NSS_STATUS_SUCCESS:
+
+ DEBUG(7, ("Group %d found (%s, %d)\n",
+ gid, grp->gr_name, grp->gr_gid));
+
+ /* gid=0 is an invalid value */
+ /* also check that the id is in the valid range for this domain */
+ if (OUT_OF_ID_RANGE(grp->gr_gid, dom->id_min, dom->id_max)) {
+
+ DEBUG(2, ("Group [%s] filtered out! (id out of range)\n",
+ grp->gr_name));
+ delete_group = true;
+ break;
+ }
+
+ DEBUG_GR_MEM(7, grp);
+
+ if (grp->gr_mem && grp->gr_mem[0]) {
+ members = sysdb_new_attrs(tmpctx);
+ if (!members) {
+ ret = ENOMEM;
+ goto done;
+ }
+ ret = sysdb_attrs_users_from_str_list(members, SYSDB_MEMBER,
+ dom->name,
+ (const char **)grp->gr_mem);
+ if (ret) {
+ goto done;
+ }
+ } else {
+ members = NULL;
+ }
+
+ ret = sysdb_store_group(tmpctx, sysdb, dom,
+ grp->gr_name,
+ grp->gr_gid,
+ members,
+ ctx->entry_cache_timeout);
+ if (ret) {
+ goto done;
+ }
+ break;
+
+ case NSS_STATUS_UNAVAIL:
+ /* "remote" backend unavailable. Enter offline mode */
+ ret = ENXIO;
+ goto done;
+
+ default:
+ ret = EIO;
+ goto done;
+ }
+
+ if (delete_group) {
+
+ DEBUG(7, ("Group %d does not exist (or is invalid) on remote server,"
+ " deleting!\n", gid));
+
+ ret = sysdb_delete_group(tmpctx, sysdb, dom, NULL, gid);
+ if (ret) {
+ goto done;
+ }
+ }
+
+done:
+ talloc_zfree(tmpctx);
+ if (ret) {
+ DEBUG(2, ("proxy -> getgrgid_r failed for '%d' <%d>\n",
+ gid, status));
+ }
+ return ret;
+}
+
+/* =Getgrent-wrapper======================================================*/
+
+static int enum_groups(TALLOC_CTX *mem_ctx,
+ struct proxy_ctx *ctx,
+ struct sysdb_ctx *sysdb,
+ struct sss_domain_info *dom)
+{
+ TALLOC_CTX *tmpctx;
+ bool in_transaction = false;
+ struct group *grp;
+ enum nss_status status;
+ size_t buflen;
+ char *buffer;
+ struct sysdb_attrs *members;
+ char *newbuf;
+ int ret;
+
+ DEBUG(7, ("Enumerating groups\n"));
+
+ tmpctx = talloc_new(mem_ctx);
+ if (!tmpctx) {
+ return ENOMEM;
+ }
+
+ grp = talloc(tmpctx, struct group);
+ if (!grp) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ buflen = DEFAULT_BUFSIZE;
+ buffer = talloc_size(tmpctx, buflen);
+ if (!buffer) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ ret = sysdb_transaction_start(sysdb);
+ if (ret) {
+ goto done;
+ }
+ in_transaction = true;
+
+ status = ctx->ops.setgrent();
+ if (status != NSS_STATUS_SUCCESS) {
+ ret = EIO;
+ goto done;
+ }
+
+again:
+ /* always zero out the grp structure */
+ memset(grp, 0, sizeof(struct group));
+
+ /* get entry */
+ status = ctx->ops.getgrent_r(grp, buffer, buflen, &ret);
+
+ switch (status) {
+ case NSS_STATUS_TRYAGAIN:
+ /* buffer too small ? */
+ if (buflen < MAX_BUF_SIZE) {
+ buflen *= 2;
+ }
+ if (buflen > MAX_BUF_SIZE) {
+ buflen = MAX_BUF_SIZE;
+ }
+ newbuf = talloc_realloc_size(tmpctx, buffer, buflen);
+ if (!newbuf) {
+ ret = ENOMEM;
+ goto done;
+ }
+ buffer = newbuf;
+ goto again;
+
+ case NSS_STATUS_NOTFOUND:
+
+ /* we are done here */
+ DEBUG(7, ("Enumeration completed.\n"));
+
+ ret = sysdb_transaction_commit(sysdb);
+ in_transaction = false;
+ break;
+
+ case NSS_STATUS_SUCCESS:
+
+ DEBUG(7, ("Group found (%s, %d)\n",
+ grp->gr_name, grp->gr_gid));
+
+ /* gid=0 is an invalid value */
+ /* also check that the id is in the valid range for this domain */
+ if (OUT_OF_ID_RANGE(grp->gr_gid, dom->id_min, dom->id_max)) {
+
+ DEBUG(2, ("Group [%s] filtered out! (id out of range)\n",
+ grp->gr_name));
+
+ goto again; /* skip */
+ }
+
+ DEBUG_GR_MEM(7, grp);
+
+ if (grp->gr_mem && grp->gr_mem[0]) {
+ members = sysdb_new_attrs(tmpctx);
+ if (!members) {
+ ret = ENOMEM;
+ goto done;
+ }
+ ret = sysdb_attrs_users_from_str_list(members, SYSDB_MEMBER,
+ dom->name,
+ (const char **)grp->gr_mem);
+ if (ret) {
+ goto done;
+ }
+ } else {
+ members = NULL;
+ }
+
+ ret = sysdb_store_group(tmpctx, sysdb, dom,
+ grp->gr_name,
+ grp->gr_gid,
+ members,
+ ctx->entry_cache_timeout);
+ if (ret) {
+ /* Do not fail completely on errors.
+ * Just report the failure to save and go on */
+ DEBUG(2, ("Failed to store group. Ignoring.\n"));
+ }
+ goto again; /* next */
+
+ case NSS_STATUS_UNAVAIL:
+ /* "remote" backend unavailable. Enter offline mode */
+ ret = ENXIO;
+ break;
+
+ default:
+ DEBUG(2, ("proxy -> getgrent_r failed (%d)[%s]\n",
+ ret, strerror(ret)));
+ break;
+ }
+
+done:
+ talloc_zfree(tmpctx);
+ if (in_transaction) {
+ sysdb_transaction_cancel(sysdb);
+ }
+ ctx->ops.endgrent();
+ return ret;
+}
+
+
+/* =Initgroups-wrapper====================================================*/
+
+static int get_initgr_groups_process(TALLOC_CTX *memctx,
+ struct proxy_ctx *ctx,
+ struct sysdb_ctx *sysdb,
+ struct sss_domain_info *dom,
+ struct passwd *pwd);
+
+static int get_initgr(TALLOC_CTX *mem_ctx,
+ struct proxy_ctx *ctx,
+ struct sysdb_ctx *sysdb,
+ struct sss_domain_info *dom,
+ const char *name)
+{
+ TALLOC_CTX *tmpctx;
+ bool in_transaction = false;
+ struct passwd *pwd;
+ enum nss_status status;
+ char *buffer;
+ size_t buflen;
+ int ret;
+
+ tmpctx = talloc_new(mem_ctx);
+ if (!tmpctx) {
+ return ENOMEM;
+ }
+
+ pwd = talloc_zero(tmpctx, struct passwd);
+ if (!pwd) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ buflen = DEFAULT_BUFSIZE;
+ buffer = talloc_size(tmpctx, buflen);
+ if (!buffer) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ ret = sysdb_transaction_start(sysdb);
+ if (ret) {
+ goto done;
+ }
+ in_transaction = true;
+
+ /* FIXME: should we move this call outside the transaction to keep the
+ * transaction as short as possible ? */
+ status = ctx->ops.getpwnam_r(name, pwd, buffer, buflen, &ret);
+
+ switch (status) {
+ case NSS_STATUS_NOTFOUND:
+
+ DEBUG(7, ("User %s not found.\n", name));
+ ret = delete_user(tmpctx, sysdb, dom, name);
+ if (ret) {
+ goto done;
+ }
+ break;
+
+ case NSS_STATUS_SUCCESS:
+
+ /* uid=0 or gid=0 are invalid values */
+ /* also check that the id is in the valid range for this domain */
+ if (OUT_OF_ID_RANGE(pwd->pw_uid, dom->id_min, dom->id_max) ||
+ OUT_OF_ID_RANGE(pwd->pw_gid, dom->id_min, dom->id_max)) {
+
+ DEBUG(2, ("User [%s] filtered out! (id out of range)\n",
+ name));
+ ret = delete_user(tmpctx, sysdb, dom, name);
+ break;
+ }
+
+ ret = sysdb_store_user(tmpctx, sysdb, dom,
+ pwd->pw_name,
+ pwd->pw_passwd,
+ pwd->pw_uid,
+ pwd->pw_gid,
+ pwd->pw_gecos,
+ pwd->pw_dir,
+ pwd->pw_shell,
+ NULL, ctx->entry_cache_timeout);
+ if (ret) {
+ goto done;
+ }
+
+ ret = get_initgr_groups_process(tmpctx, ctx, sysdb, dom, pwd);
+ if (ret == EOK) {
+ ret = sysdb_transaction_commit(sysdb);
+ in_transaction = true;
+ }
+ break;
+
+ case NSS_STATUS_UNAVAIL:
+ /* "remote" backend unavailable. Enter offline mode */
+ ret = ENXIO;
+ break;
+
+ default:
+ DEBUG(2, ("proxy -> getpwnam_r failed for '%s' <%d>\n",
+ name, status));
+ ret = EIO;
+ break;
+ }
+
+done:
+ talloc_zfree(tmpctx);
+ if (in_transaction) {
+ sysdb_transaction_cancel(sysdb);
+ }
+ return ret;
+}
+
+static int get_initgr_groups_process(TALLOC_CTX *memctx,
+ struct proxy_ctx *ctx,
+ struct sysdb_ctx *sysdb,
+ struct sss_domain_info *dom,
+ struct passwd *pwd)
+{
+ enum nss_status status;
+ long int limit;
+ long int size;
+ long int num;
+ long int num_gids;
+ gid_t *gids;
+ int ret;
+ int i;
+
+ num_gids = 0;
+ limit = 4096;
+ num = 4096;
+ size = num*sizeof(gid_t);
+ gids = talloc_size(memctx, size);
+ if (!gids) {
+ return ENOMEM;
+ }
+
+again:
+ /* FIXME: should we move this call outside the transaction to keep the
+ * transaction as short as possible ? */
+ status = ctx->ops.initgroups_dyn(pwd->pw_name, pwd->pw_gid, &num_gids,
+ &num, &gids, limit, &ret);
+ switch (status) {
+ case NSS_STATUS_TRYAGAIN:
+ /* buffer too small ? */
+ if (size < MAX_BUF_SIZE) {
+ num *= 2;
+ size = num*sizeof(gid_t);
+ }
+ if (size > MAX_BUF_SIZE) {
+ size = MAX_BUF_SIZE;
+ num = size/sizeof(gid_t);
+ }
+ limit = num;
+ gids = talloc_realloc_size(memctx, gids, size);
+ if (!gids) {
+ return ENOMEM;
+ }
+ goto again; /* retry with more memory */
+
+ case NSS_STATUS_SUCCESS:
+ DEBUG(4, ("User [%s] appears to be member of %lu groups\n",
+ pwd->pw_name, num_gids));
+
+ for (i = 0; i < num_gids; i++) {
+ ret = get_gr_gid(memctx, ctx, sysdb, dom, gids[i]);
+ if (ret) {
+ return ret;
+ }
+ }
+ break;
+
+ default:
+ DEBUG(2, ("proxy -> initgroups_dyn failed (%d)[%s]\n",
+ ret, strerror(ret)));
+ ret = EIO;
+ break;
+ }
+
+ return ret;
+}
+
+/* =Proxy_Id-Functions====================================================*/
+
+static void proxy_get_account_info(struct be_req *breq)
+{
+ struct be_acct_req *ar;
+ struct proxy_ctx *ctx;
+ struct tevent_context *ev;
+ struct sysdb_ctx *sysdb;
+ struct sss_domain_info *domain;
+ uid_t uid;
+ gid_t gid;
+ int ret;
+
+ ar = talloc_get_type(breq->req_data, struct be_acct_req);
+ ctx = talloc_get_type(breq->be_ctx->bet_info[BET_ID].pvt_bet_data, struct proxy_ctx);
+ ev = breq->be_ctx->ev;
+ sysdb = breq->be_ctx->sysdb;
+ domain = breq->be_ctx->domain;
+
+ if (be_is_offline(breq->be_ctx)) {
+ return proxy_reply(breq, DP_ERR_OFFLINE, EAGAIN, "Offline");
+ }
+
+ /* for now we support only core attrs */
+ if (ar->attr_type != BE_ATTR_CORE) {
+ return proxy_reply(breq, DP_ERR_FATAL, EINVAL, "Invalid attr type");
+ }
+
+ switch (ar->entry_type & 0xFFF) {
+ case BE_REQ_USER: /* user */
+ switch (ar->filter_type) {
+ case BE_FILTER_NAME:
+ if (strchr(ar->filter_value, '*')) {
+ ret = enum_users(breq, ctx, sysdb, domain);
+ } else {
+ ret = get_pw_name(breq, ctx, sysdb, domain, ar->filter_value);
+ }
+ break;
+
+ case BE_FILTER_IDNUM:
+ if (strchr(ar->filter_value, '*')) {
+ return proxy_reply(breq, DP_ERR_FATAL,
+ EINVAL, "Invalid attr type");
+ } else {
+ char *endptr;
+ errno = 0;
+ uid = (uid_t)strtol(ar->filter_value, &endptr, 0);
+ if (errno || *endptr || (ar->filter_value == endptr)) {
+ return proxy_reply(breq, DP_ERR_FATAL,
+ EINVAL, "Invalid attr type");
+ }
+ ret = get_pw_uid(breq, ctx, sysdb, domain, uid);
+ }
+ break;
+ default:
+ return proxy_reply(breq, DP_ERR_FATAL,
+ EINVAL, "Invalid filter type");
+ }
+ break;
+
+ case BE_REQ_GROUP: /* group */
+ switch (ar->filter_type) {
+ case BE_FILTER_NAME:
+ if (strchr(ar->filter_value, '*')) {
+ ret = enum_groups(breq, ctx, sysdb, domain);
+ } else {
+ ret = get_gr_name(breq, ctx, sysdb, domain, ar->filter_value);
+ }
+ break;
+ case BE_FILTER_IDNUM:
+ if (strchr(ar->filter_value, '*')) {
+ return proxy_reply(breq, DP_ERR_FATAL,
+ EINVAL, "Invalid attr type");
+ } else {
+ char *endptr;
+ errno = 0;
+ gid = (gid_t)strtol(ar->filter_value, &endptr, 0);
+ if (errno || *endptr || (ar->filter_value == endptr)) {
+ return proxy_reply(breq, DP_ERR_FATAL,
+ EINVAL, "Invalid attr type");
+ }
+ ret = get_gr_gid(breq, ctx, sysdb, domain, gid);
+ }
+ break;
+ default:
+ return proxy_reply(breq, DP_ERR_FATAL,
+ EINVAL, "Invalid filter type");
+ }
+ break;
+
+ case BE_REQ_INITGROUPS: /* init groups for user */
+ if (ar->filter_type != BE_FILTER_NAME) {
+ return proxy_reply(breq, DP_ERR_FATAL,
+ EINVAL, "Invalid filter type");
+ }
+ if (strchr(ar->filter_value, '*')) {
+ return proxy_reply(breq, DP_ERR_FATAL,
+ EINVAL, "Invalid filter value");
+ }
+ if (ctx->ops.initgroups_dyn == NULL) {
+ return proxy_reply(breq, DP_ERR_FATAL,
+ ENODEV, "Initgroups call not supported");
+ }
+ ret = get_initgr(breq, ctx, sysdb, domain, ar->filter_value);
+ break;
+
+ default: /*fail*/
+ return proxy_reply(breq, DP_ERR_FATAL,
+ EINVAL, "Invalid request type");
+ }
+
+ if (ret) {
+ if (ret == ENXIO) {
+ DEBUG(2, ("proxy returned UNAVAIL error, going offline!\n"));
+ be_mark_offline(breq->be_ctx);
+ }
+ proxy_reply(breq, DP_ERR_FATAL, ret, NULL);
+ return;
+ }
+ proxy_reply(breq, DP_ERR_OK, EOK, NULL);
+}
+
+static void proxy_shutdown(struct be_req *req)
+{
+ /* TODO: Clean up any internal data */
+ req->fn(req, DP_ERR_OK, EOK, NULL);
+}
+
+static void proxy_auth_shutdown(struct be_req *req)
+{
+ talloc_free(req->be_ctx->bet_info[BET_AUTH].pvt_bet_data);
+ req->fn(req, DP_ERR_OK, EOK, NULL);
+}
+
+struct bet_ops proxy_id_ops = {
+ .handler = proxy_get_account_info,
+ .finalize = proxy_shutdown
+};
+
+struct bet_ops proxy_auth_ops = {
+ .handler = proxy_pam_handler,
+ .finalize = proxy_auth_shutdown
+};
+
+struct bet_ops proxy_access_ops = {
+ .handler = proxy_pam_handler,
+ .finalize = proxy_auth_shutdown
+};
+
+struct bet_ops proxy_chpass_ops = {
+ .handler = proxy_pam_handler,
+ .finalize = proxy_auth_shutdown
+};
+
+static void *proxy_dlsym(void *handle, const char *functemp, char *libname)
+{
+ char *funcname;
+ void *funcptr;
+
+ funcname = talloc_asprintf(NULL, functemp, libname);
+ if (funcname == NULL) return NULL;
+
+ funcptr = dlsym(handle, funcname);
+ talloc_free(funcname);
+
+ return funcptr;
+}
+
+int sssm_proxy_id_init(struct be_ctx *bectx,
+ struct bet_ops **ops, void **pvt_data)
+{
+ struct proxy_ctx *ctx;
+ char *libname;
+ char *libpath;
+ void *handle;
+ int ret;
+
+ ctx = talloc_zero(bectx, struct proxy_ctx);
+ if (!ctx) {
+ return ENOMEM;
+ }
+ ctx->be = bectx;
+
+ ret = confdb_get_int(bectx->cdb, ctx, bectx->conf_path,
+ CONFDB_DOMAIN_ENTRY_CACHE_TIMEOUT, 600,
+ &ctx->entry_cache_timeout);
+ if (ret != EOK) goto done;
+
+ ret = confdb_get_string(bectx->cdb, ctx, bectx->conf_path,
+ CONFDB_PROXY_LIBNAME, NULL, &libname);
+ if (ret != EOK) goto done;
+ if (libname == NULL) {
+ ret = ENOENT;
+ goto done;
+ }
+
+ libpath = talloc_asprintf(ctx, "libnss_%s.so.2", libname);
+ if (!libpath) {
+ ret = ENOMEM;
+ goto done;
+ }
+
+ handle = dlopen(libpath, RTLD_NOW);
+ if (!handle) {
+ DEBUG(0, ("Unable to load %s module with path, error: %s\n",
+ libpath, dlerror()));
+ ret = ELIBACC;
+ goto done;
+ }
+
+ ctx->ops.getpwnam_r = proxy_dlsym(handle, "_nss_%s_getpwnam_r", libname);
+ if (!ctx->ops.getpwnam_r) {
+ DEBUG(0, ("Failed to load NSS fns, error: %s\n", dlerror()));
+ ret = ELIBBAD;
+ goto done;
+ }
+
+ ctx->ops.getpwuid_r = proxy_dlsym(handle, "_nss_%s_getpwuid_r", libname);
+ if (!ctx->ops.getpwuid_r) {
+ DEBUG(0, ("Failed to load NSS fns, error: %s\n", dlerror()));
+ ret = ELIBBAD;
+ goto done;
+ }
+
+ ctx->ops.setpwent = proxy_dlsym(handle, "_nss_%s_setpwent", libname);
+ if (!ctx->ops.setpwent) {
+ DEBUG(0, ("Failed to load NSS fns, error: %s\n", dlerror()));
+ ret = ELIBBAD;
+ goto done;
+ }
+
+ ctx->ops.getpwent_r = proxy_dlsym(handle, "_nss_%s_getpwent_r", libname);
+ if (!ctx->ops.getpwent_r) {
+ DEBUG(0, ("Failed to load NSS fns, error: %s\n", dlerror()));
+ ret = ELIBBAD;
+ goto done;
+ }
+
+ ctx->ops.endpwent = proxy_dlsym(handle, "_nss_%s_endpwent", libname);
+ if (!ctx->ops.endpwent) {
+ DEBUG(0, ("Failed to load NSS fns, error: %s\n", dlerror()));
+ ret = ELIBBAD;
+ goto done;
+ }
+
+ ctx->ops.getgrnam_r = proxy_dlsym(handle, "_nss_%s_getgrnam_r", libname);
+ if (!ctx->ops.getgrnam_r) {
+ DEBUG(0, ("Failed to load NSS fns, error: %s\n", dlerror()));
+ ret = ELIBBAD;
+ goto done;
+ }
+
+ ctx->ops.getgrgid_r = proxy_dlsym(handle, "_nss_%s_getgrgid_r", libname);
+ if (!ctx->ops.getgrgid_r) {
+ DEBUG(0, ("Failed to load NSS fns, error: %s\n", dlerror()));
+ ret = ELIBBAD;
+ goto done;
+ }
+
+ ctx->ops.setgrent = proxy_dlsym(handle, "_nss_%s_setgrent", libname);
+ if (!ctx->ops.setgrent) {
+ DEBUG(0, ("Failed to load NSS fns, error: %s\n", dlerror()));
+ ret = ELIBBAD;
+ goto done;
+ }
+
+ ctx->ops.getgrent_r = proxy_dlsym(handle, "_nss_%s_getgrent_r", libname);
+ if (!ctx->ops.getgrent_r) {
+ DEBUG(0, ("Failed to load NSS fns, error: %s\n", dlerror()));
+ ret = ELIBBAD;
+ goto done;
+ }
+
+ ctx->ops.endgrent = proxy_dlsym(handle, "_nss_%s_endgrent", libname);
+ if (!ctx->ops.endgrent) {
+ DEBUG(0, ("Failed to load NSS fns, error: %s\n", dlerror()));
+ ret = ELIBBAD;
+ goto done;
+ }
+
+ ctx->ops.initgroups_dyn = proxy_dlsym(handle, "_nss_%s_initgroups_dyn",
+ libname);
+ if (!ctx->ops.initgroups_dyn) {
+ DEBUG(1, ("The '%s' library does not provides the "
+ "_nss_XXX_initgroups_dyn function!\n"
+ "initgroups will be slow as it will require "
+ "full groups enumeration!\n", libname));
+ }
+
+ *ops = &proxy_id_ops;
+ *pvt_data = ctx;
+ ret = EOK;
+
+done:
+ if (ret != EOK) {
+ talloc_free(ctx);
+ }
+ return ret;
+}
+
+struct proxy_client {
+ struct proxy_auth_ctx *proxy_auth_ctx;
+ struct sbus_connection *conn;
+ struct tevent_timer *timeout;
+ bool initialized;
+};
+
+static void init_timeout(struct tevent_context *ev,
+ struct tevent_timer *te,
+ struct timeval t, void *ptr);
+static int proxy_client_init(struct sbus_connection *conn, void *data)
+{
+ struct proxy_auth_ctx *proxy_auth_ctx;
+ struct proxy_client *proxy_cli;
+ struct timeval tv;
+
+ proxy_auth_ctx = talloc_get_type(data, struct proxy_auth_ctx);
+
+ /* hang off this memory to the connection so that when the connection
+ * is freed we can potentially call a destructor */
+
+ proxy_cli = talloc_zero(conn, struct proxy_client);
+ if (!proxy_cli) {
+ DEBUG(0,("Out of memory?!\n"));
+ talloc_zfree(conn);
+ return ENOMEM;
+ }
+ proxy_cli->proxy_auth_ctx = proxy_auth_ctx;
+ proxy_cli->conn = conn;
+ proxy_cli->initialized = false;
+
+ /* 5 seconds should be plenty */
+ tv = tevent_timeval_current_ofs(5, 0);
+
+ proxy_cli->timeout = tevent_add_timer(proxy_auth_ctx->be->ev, proxy_cli,
+ tv, init_timeout, proxy_cli);
+ if (!proxy_cli->timeout) {
+ DEBUG(0,("Out of memory?!\n"));
+ talloc_zfree(conn);
+ return ENOMEM;
+ }
+ DEBUG(4, ("Set-up proxy client ID timeout [%p]\n", proxy_cli->timeout));
+
+ /* Attach the client context to the connection context, so that it is
+ * always available when we need to manage the connection. */
+ sbus_conn_set_private_data(conn, proxy_cli);
+
+ return EOK;
+}
+
+static void init_timeout(struct tevent_context *ev,
+ struct tevent_timer *te,
+ struct timeval t, void *ptr)
+{
+ struct proxy_client *proxy_cli;
+
+ DEBUG(2, ("Client timed out before Identification [%p]!\n", te));
+
+ proxy_cli = talloc_get_type(ptr, struct proxy_client);
+
+ sbus_disconnect(proxy_cli->conn);
+ talloc_zfree(proxy_cli);
+
+ /* If we time out here, we will also time out to
+ * pc_init_timeout(), so we'll finish the request
+ * there.
+ */
+}
+
+static int client_registration(DBusMessage *message,
+ struct sbus_connection *conn)
+{
+ dbus_uint16_t version = DATA_PROVIDER_VERSION;
+ struct proxy_client *proxy_cli;
+ DBusMessage *reply;
+ DBusError dbus_error;
+ dbus_uint16_t cli_ver;
+ uint32_t cli_id;
+ dbus_bool_t dbret;
+ void *data;
+ int hret;
+ hash_key_t key;
+ hash_value_t value;
+ struct tevent_req *req;
+ struct proxy_child_ctx *child_ctx;
+ struct pc_init_ctx *init_ctx;
+
+ data = sbus_conn_get_private_data(conn);
+ proxy_cli = talloc_get_type(data, struct proxy_client);
+ if (!proxy_cli) {
+ DEBUG(0, ("Connection holds no valid init data\n"));
+ return EINVAL;
+ }
+
+ /* First thing, cancel the timeout */
+ DEBUG(4, ("Cancel proxy client ID timeout [%p]\n", proxy_cli->timeout));
+ talloc_zfree(proxy_cli->timeout);
+
+ dbus_error_init(&dbus_error);
+
+ dbret = dbus_message_get_args(message, &dbus_error,
+ DBUS_TYPE_UINT16, &cli_ver,
+ DBUS_TYPE_UINT32, &cli_id,
+ DBUS_TYPE_INVALID);
+ if (!dbret) {
+ DEBUG(1, ("Failed to parse message, killing connection\n"));
+ if (dbus_error_is_set(&dbus_error)) dbus_error_free(&dbus_error);
+ sbus_disconnect(conn);
+ /* FIXME: should we just talloc_zfree(conn) ? */
+ return EIO;
+ }
+
+ DEBUG(4, ("Proxy client [%ld] connected\n", cli_id));
+
+ /* Check the hash table */
+ key.type = HASH_KEY_ULONG;
+ key.ul = cli_id;
+ if (!hash_has_key(proxy_cli->proxy_auth_ctx->request_table, &key)) {
+ DEBUG(1, ("Unknown child ID. Killing the connection\n"));
+ sbus_disconnect(proxy_cli->conn);
+ return EIO;
+ }
+
+ /* reply that all is ok */
+ reply = dbus_message_new_method_return(message);
+ if (!reply) {
+ DEBUG(0, ("Dbus Out of memory!\n"));
+ return ENOMEM;
+ }
+
+ dbret = dbus_message_append_args(reply,
+ DBUS_TYPE_UINT16, &version,
+ DBUS_TYPE_INVALID);
+ if (!dbret) {
+ DEBUG(0, ("Failed to build dbus reply\n"));
+ dbus_message_unref(reply);
+ sbus_disconnect(conn);
+ return EIO;
+ }
+
+ /* send reply back */
+ sbus_conn_send_reply(conn, reply);
+ dbus_message_unref(reply);
+
+ hret = hash_lookup(proxy_cli->proxy_auth_ctx->request_table, &key, &value);
+ if (hret != HASH_SUCCESS) {
+ DEBUG(1, ("Hash error [%d][%s]\n", hret, hash_error_string(hret)));
+ sbus_disconnect(conn);
+ }
+
+ /* Signal that the child is up and ready to receive the request */
+ req = talloc_get_type(value.ptr, struct tevent_req);
+ child_ctx = tevent_req_data(req, struct proxy_child_ctx);
+
+ if (!child_ctx->running) {
+ /* This should hopefully be impossible, but protect
+ * against it anyway. If we're not marked running, then
+ * the init_req will be NULL below and things will
+ * break.
+ */
+ DEBUG(1, ("Client connection from a request "
+ "that's not marked as running\n"));
+ return EIO;
+ }
+
+ init_ctx = tevent_req_data(child_ctx->init_req, struct pc_init_ctx);
+ init_ctx->conn = conn;
+ tevent_req_done(child_ctx->init_req);
+ child_ctx->init_req = NULL;
+
+ return EOK;
+}
+
+int sssm_proxy_auth_init(struct be_ctx *bectx,
+ struct bet_ops **ops, void **pvt_data)
+{
+ struct proxy_auth_ctx *ctx;
+ int ret;
+ int hret;
+ char *sbus_address;
+
+ /* If we're already set up, just return that */
+ if(bectx->bet_info[BET_AUTH].mod_name &&
+ strcmp("proxy", bectx->bet_info[BET_AUTH].mod_name) == 0) {
+ DEBUG(8, ("Re-using proxy_auth_ctx for this provider\n"));
+ *ops = bectx->bet_info[BET_AUTH].bet_ops;
+ *pvt_data = bectx->bet_info[BET_AUTH].pvt_bet_data;
+ return EOK;
+ }
+
+ ctx = talloc_zero(bectx, struct proxy_auth_ctx);
+ if (!ctx) {
+ return ENOMEM;
+ }
+ ctx->be = bectx;
+ ctx->timeout_ms = SSS_CLI_SOCKET_TIMEOUT/4;
+ ctx->next_id = 1;
+
+ ret = confdb_get_string(bectx->cdb, ctx, bectx->conf_path,
+ CONFDB_PROXY_PAM_TARGET, NULL,
+ &ctx->pam_target);
+ if (ret != EOK) goto done;
+ if (!ctx->pam_target) {
+ DEBUG(1, ("Missing option proxy_pam_target.\n"));
+ ret = EINVAL;
+ goto done;
+ }
+
+ sbus_address = talloc_asprintf(ctx, "unix:path=%s/%s_%s", PIPE_PATH,
+ PROXY_CHILD_PIPE, bectx->domain->name);
+ if (sbus_address == NULL) {
+ DEBUG(1, ("talloc_asprintf failed.\n"));
+ ret = ENOMEM;
+ goto done;
+ }
+
+ ret = sbus_new_server(ctx, bectx->ev, sbus_address, &proxy_interface,
+ &ctx->sbus_srv, proxy_client_init, ctx);
+ if (ret != EOK) {
+ DEBUG(0, ("Could not set up sbus server.\n"));
+ goto done;
+ }
+
+ /* Set up request hash table */
+ /* FIXME: get max_children from configuration file */
+ ctx->max_children = 10;
+
+ hret = hash_create(ctx->max_children * 2, &ctx->request_table,
+ NULL, NULL);
+ if (hret != HASH_SUCCESS) {
+ DEBUG(0, ("Could not initialize request table\n"));
+ ret = EIO;
+ goto done;
+ }
+
+ *ops = &proxy_auth_ops;
+ *pvt_data = ctx;
+
+done:
+ if (ret != EOK) {
+ talloc_free(ctx);
+ }
+ return ret;
+}
+
+int sssm_proxy_access_init(struct be_ctx *bectx,
+ struct bet_ops **ops, void **pvt_data)
+{
+ int ret;
+ ret = sssm_proxy_auth_init(bectx, ops, pvt_data);
+ *ops = &proxy_access_ops;
+ return ret;
+}
+
+int sssm_proxy_chpass_init(struct be_ctx *bectx,
+ struct bet_ops **ops, void **pvt_data)
+{
+ int ret;
+ ret = sssm_proxy_auth_init(bectx, ops, pvt_data);
+ *ops = &proxy_chpass_ops;
+ return ret;
+}
diff --git a/src/providers/proxy/proxy.h b/src/providers/proxy/proxy.h
new file mode 100644
index 000000000..d95e50efe
--- /dev/null
+++ b/src/providers/proxy/proxy.h
@@ -0,0 +1,30 @@
+/*
+ SSSD
+
+ Proxy provider, private header file
+
+ Authors:
+ Sumit Bose <sbose@redhat.com>
+
+ Copyright (C) 2010 Red Hat
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __PROXY_H__
+#define __PROXY_H__
+
+#define PROXY_CHILD_PIPE "private/proxy_child"
+
+#endif /* __PROXY_H__ */
diff --git a/src/providers/proxy/proxy_child.c b/src/providers/proxy/proxy_child.c
new file mode 100644
index 000000000..c8f1eeb50
--- /dev/null
+++ b/src/providers/proxy/proxy_child.c
@@ -0,0 +1,507 @@
+/*
+ SSSD
+
+ Pam Proxy Child
+
+ Authors:
+
+ Sumit Bose <sbose@redhat.com>
+
+ Copyright (C) 2010 Red Hat
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <string.h>
+#include <sys/time.h>
+#include <errno.h>
+#include <dlfcn.h>
+
+#include <security/pam_appl.h>
+#include <security/pam_modules.h>
+
+#include "popt.h"
+#include "util/util.h"
+#include "confdb/confdb.h"
+#include "dbus/dbus.h"
+#include "sbus/sssd_dbus.h"
+#include "providers/proxy/proxy.h"
+
+#include "providers/dp_backend.h"
+
+static int pc_pam_handler(DBusMessage *message, struct sbus_connection *conn);
+
+struct sbus_method pc_methods[] = {
+ { DP_METHOD_PAMHANDLER, pc_pam_handler },
+ { NULL, NULL }
+};
+
+struct sbus_interface pc_interface = {
+ DP_INTERFACE,
+ DP_PATH,
+ SBUS_DEFAULT_VTABLE,
+ pc_methods,
+ NULL
+};
+
+struct pc_ctx {
+ struct tevent_context *ev;
+ struct confdb_ctx *cdb;
+ struct sss_domain_info *domain;
+ const char *identity;
+ const char *conf_path;
+ struct sbus_connection *mon_conn;
+ struct sbus_connection *conn;
+ const char *pam_target;
+ uint32_t id;
+};
+
+struct authtok_conv {
+ uint32_t authtok_size;
+ uint8_t *authtok;
+};
+
+static int proxy_internal_conv(int num_msg, const struct pam_message **msgm,
+ struct pam_response **response,
+ void *appdata_ptr) {
+ int i;
+ struct pam_response *reply;
+ struct authtok_conv *auth_data;
+
+ auth_data = talloc_get_type(appdata_ptr, struct authtok_conv);
+
+ if (num_msg <= 0) return PAM_CONV_ERR;
+
+ reply = (struct pam_response *) calloc(num_msg,
+ sizeof(struct pam_response));
+ if (reply == NULL) return PAM_CONV_ERR;
+
+ for (i=0; i < num_msg; i++) {
+ switch( msgm[i]->msg_style ) {
+ case PAM_PROMPT_ECHO_OFF:
+ DEBUG(4, ("Conversation message: [%s]\n", msgm[i]->msg));
+ reply[i].resp_retcode = 0;
+ reply[i].resp = calloc(auth_data->authtok_size + 1,
+ sizeof(char));
+ if (reply[i].resp == NULL) goto failed;
+ memcpy(reply[i].resp, auth_data->authtok,
+ auth_data->authtok_size);
+
+ break;
+ default:
+ DEBUG(1, ("Conversation style %d not supported.\n",
+ msgm[i]->msg_style));
+ goto failed;
+ }
+ }
+
+ *response = reply;
+ reply = NULL;
+
+ return PAM_SUCCESS;
+
+failed:
+ free(reply);
+ return PAM_CONV_ERR;
+}
+
+static errno_t call_pam_stack(const char *pam_target, struct pam_data *pd)
+{
+ int ret;
+ int pam_status;
+ pam_handle_t *pamh=NULL;
+ struct authtok_conv *auth_data;
+ struct pam_conv conv;
+
+ conv.conv=proxy_internal_conv;
+ auth_data = talloc_zero(pd, struct authtok_conv);
+ conv.appdata_ptr=auth_data;
+
+ ret = pam_start(pam_target, pd->user, &conv, &pamh);
+ if (ret == PAM_SUCCESS) {
+ DEBUG(7, ("Pam transaction started with service name [%s].\n",
+ pam_target));
+ ret = pam_set_item(pamh, PAM_TTY, pd->tty);
+ if (ret != PAM_SUCCESS) {
+ DEBUG(1, ("Setting PAM_TTY failed: %s.\n",
+ pam_strerror(pamh, ret)));
+ }
+ ret = pam_set_item(pamh, PAM_RUSER, pd->ruser);
+ if (ret != PAM_SUCCESS) {
+ DEBUG(1, ("Setting PAM_RUSER failed: %s.\n",
+ pam_strerror(pamh, ret)));
+ }
+ ret = pam_set_item(pamh, PAM_RHOST, pd->rhost);
+ if (ret != PAM_SUCCESS) {
+ DEBUG(1, ("Setting PAM_RHOST failed: %s.\n",
+ pam_strerror(pamh, ret)));
+ }
+ switch (pd->cmd) {
+ case SSS_PAM_AUTHENTICATE:
+ auth_data->authtok_size = pd->authtok_size;
+ auth_data->authtok = pd->authtok;
+ pam_status = pam_authenticate(pamh, 0);
+ break;
+ case SSS_PAM_SETCRED:
+ pam_status=pam_setcred(pamh, 0);
+ break;
+ case SSS_PAM_ACCT_MGMT:
+ pam_status=pam_acct_mgmt(pamh, 0);
+ break;
+ case SSS_PAM_OPEN_SESSION:
+ pam_status=pam_open_session(pamh, 0);
+ break;
+ case SSS_PAM_CLOSE_SESSION:
+ pam_status=pam_close_session(pamh, 0);
+ break;
+ case SSS_PAM_CHAUTHTOK:
+ if (pd->priv != 1) {
+ auth_data->authtok_size = pd->authtok_size;
+ auth_data->authtok = pd->authtok;
+ pam_status = pam_authenticate(pamh, 0);
+ if (pam_status != PAM_SUCCESS) break;
+ }
+ auth_data->authtok_size = pd->newauthtok_size;
+ auth_data->authtok = pd->newauthtok;
+ pam_status = pam_chauthtok(pamh, 0);
+ break;
+ case SSS_PAM_CHAUTHTOK_PRELIM:
+ if (pd->priv != 1) {
+ auth_data->authtok_size = pd->authtok_size;
+ auth_data->authtok = pd->authtok;
+ pam_status = pam_authenticate(pamh, 0);
+ } else {
+ pam_status = PAM_SUCCESS;
+ }
+ break;
+ default:
+ DEBUG(1, ("unknown PAM call\n"));
+ pam_status=PAM_ABORT;
+ }
+
+ DEBUG(4, ("Pam result: [%d][%s]\n", pam_status,
+ pam_strerror(pamh, pam_status)));
+
+ ret = pam_end(pamh, pam_status);
+ if (ret != PAM_SUCCESS) {
+ pamh=NULL;
+ DEBUG(1, ("Cannot terminate pam transaction.\n"));
+ }
+
+ } else {
+ DEBUG(1, ("Failed to initialize pam transaction.\n"));
+ pam_status = PAM_SYSTEM_ERR;
+ }
+
+ pd->pam_status = pam_status;
+
+ return EOK;
+}
+
+static int pc_pam_handler(DBusMessage *message, struct sbus_connection *conn)
+{
+ DBusError dbus_error;
+ DBusMessage *reply;
+ struct pc_ctx *pc_ctx;
+ errno_t ret;
+ void *user_data;
+ struct pam_data *pd = NULL;
+
+ user_data = sbus_conn_get_private_data(conn);
+ if (!user_data) {
+ ret = EINVAL;
+ goto done;
+ }
+ pc_ctx = talloc_get_type(user_data, struct pc_ctx);
+ if (!pc_ctx) {
+ ret = EINVAL;
+ goto done;
+ }
+
+ reply = dbus_message_new_method_return(message);
+ if (!reply) {
+ DEBUG(1, ("dbus_message_new_method_return failed, "
+ "cannot send reply.\n"));
+ ret = ENOMEM;
+ goto done;
+ }
+
+ dbus_error_init(&dbus_error);
+
+ ret = dp_unpack_pam_request(message, pc_ctx, &pd, &dbus_error);
+ if (!ret) {
+ DEBUG(1,("Failed, to parse message!\n"));
+ ret = EIO;
+ goto done;
+ }
+
+ pd->pam_status = PAM_SYSTEM_ERR;
+ pd->domain = talloc_strdup(pd, pc_ctx->domain->name);
+ if (pd->domain == NULL) {
+ talloc_free(pd);
+ ret = ENOMEM;
+ goto done;
+ }
+
+ DEBUG(4, ("Got request with the following data\n"));
+ DEBUG_PAM_DATA(4, pd);
+
+ ret = call_pam_stack(pc_ctx->pam_target, pd);
+ if (ret != EOK) {
+ DEBUG(1, ("call_pam_stack failed.\n"));
+ }
+
+ DEBUG(4, ("Sending result [%d][%s]\n",
+ pd->pam_status, pd->domain));
+
+ ret = dp_pack_pam_response(reply, pd);
+ if (!ret) {
+ DEBUG(1, ("Failed to generate dbus reply\n"));
+ talloc_free(pd);
+ dbus_message_unref(reply);
+ ret = EIO;
+ goto done;
+ }
+
+ sbus_conn_send_reply(conn, reply);
+ dbus_message_unref(reply);
+ talloc_free(pd);
+
+ /* We'll return the message and let the
+ * parent process kill us.
+ */
+ return EOK;
+
+done:
+ exit(ret);
+}
+
+int proxy_child_send_id(struct sbus_connection *conn,
+ uint16_t version,
+ uint32_t id);
+static int proxy_cli_init(struct pc_ctx *ctx)
+{
+ char *sbus_address;
+ int ret;
+
+ sbus_address = talloc_asprintf(ctx, "unix:path=%s/%s_%s",
+ PIPE_PATH, PROXY_CHILD_PIPE,
+ ctx->domain->name);
+ if (sbus_address == NULL) {
+ DEBUG(1, ("talloc_asprintf failed.\n"));
+ return ENOMEM;
+ }
+
+ ret = sbus_client_init(ctx, ctx->ev, sbus_address,
+ &pc_interface, &ctx->conn,
+ NULL, ctx);
+ if (ret != EOK) {
+ DEBUG(1, ("sbus_client_init failed.\n"));
+ return ret;
+ }
+
+ ret = proxy_child_send_id(ctx->conn, DATA_PROVIDER_VERSION, ctx->id);
+ if (ret != EOK) {
+ DEBUG(0, ("dp_common_send_id failed.\n"));
+ return ret;
+ }
+
+ return EOK;
+}
+
+int proxy_child_send_id(struct sbus_connection *conn,
+ uint16_t version,
+ uint32_t id)
+{
+ DBusMessage *msg;
+ dbus_bool_t ret;
+ int retval;
+
+ /* create the message */
+ msg = dbus_message_new_method_call(NULL,
+ DP_PATH,
+ DP_INTERFACE,
+ DP_METHOD_REGISTER);
+ if (msg == NULL) {
+ DEBUG(0, ("Out of memory?!\n"));
+ return ENOMEM;
+ }
+
+ DEBUG(4, ("Sending ID to Proxy Backend: (%d,%ld)\n",
+ version, id));
+
+ ret = dbus_message_append_args(msg,
+ DBUS_TYPE_UINT16, &version,
+ DBUS_TYPE_UINT32, &id,
+ DBUS_TYPE_INVALID);
+ if (!ret) {
+ DEBUG(1, ("Failed to build message\n"));
+ return EIO;
+ }
+
+ retval = sbus_conn_send(conn, msg, 30000, dp_id_callback, NULL, NULL);
+
+ dbus_message_unref(msg);
+ return retval;
+}
+
+int proxy_child_process_init(TALLOC_CTX *mem_ctx, const char *domain,
+ struct tevent_context *ev, struct confdb_ctx *cdb,
+ const char *pam_target, uint32_t id)
+{
+ struct pc_ctx *ctx;
+ int ret;
+
+ ctx = talloc_zero(mem_ctx, struct pc_ctx);
+ if (!ctx) {
+ DEBUG(0, ("fatal error initializing pc_ctx\n"));
+ return ENOMEM;
+ }
+ ctx->ev = ev;
+ ctx->cdb = cdb;
+ ctx->pam_target = talloc_steal(ctx, pam_target);
+ ctx->id = id;
+ ctx->conf_path = talloc_asprintf(ctx, CONFDB_DOMAIN_PATH_TMPL, domain);
+ if (!ctx->conf_path) {
+ DEBUG(0, ("Out of memory!?\n"));
+ return ENOMEM;
+ }
+
+ ret = confdb_get_domain(cdb, domain, &ctx->domain);
+ if (ret != EOK) {
+ DEBUG(0, ("fatal error retrieving domain configuration\n"));
+ return ret;
+ }
+
+ ret = proxy_cli_init(ctx);
+ if (ret != EOK) {
+ DEBUG(0, ("fatal error setting up server bus\n"));
+ return ret;
+ }
+
+ return EOK;
+}
+
+int main(int argc, const char *argv[])
+{
+ int opt;
+ poptContext pc;
+ char *domain = NULL;
+ char *srv_name = NULL;
+ char *conf_entry = NULL;
+ struct main_context *main_ctx;
+ int ret;
+ long id;
+ char *pam_target = NULL;
+
+ struct poptOption long_options[] = {
+ POPT_AUTOHELP
+ SSSD_MAIN_OPTS
+ {"domain", 0, POPT_ARG_STRING, &domain, 0,
+ _("Domain of the information provider (mandatory)"), NULL },
+ {"id", 0, POPT_ARG_LONG, &id, 0,
+ _("Child identifier (mandatory)"), NULL },
+ POPT_TABLEEND
+ };
+
+ pc = poptGetContext(argv[0], argc, argv, long_options, 0);
+ while((opt = poptGetNextOpt(pc)) != -1) {
+ switch(opt) {
+ default:
+ fprintf(stderr, "\nInvalid option %s: %s\n\n",
+ poptBadOption(pc, 0), poptStrerror(opt));
+ poptPrintUsage(pc, stderr, 0);
+ return 1;
+ }
+ }
+
+ if (domain == NULL) {
+ fprintf(stderr, "\nMissing option, "
+ "--domain is a mandatory option.\n\n");
+ poptPrintUsage(pc, stderr, 0);
+ return 1;
+ }
+
+ if (id == 0) {
+ fprintf(stderr, "\nMissing option, "
+ "--id is a mandatory option.\n\n");
+ poptPrintUsage(pc, stderr, 0);
+ return 1;
+ }
+
+ poptFreeContext(pc);
+
+
+ /* set up things like debug , signals, daemonization, etc... */
+ debug_log_file = talloc_asprintf(NULL, "proxy_child_%s", domain);
+ if (!debug_log_file) return 2;
+
+ srv_name = talloc_asprintf(NULL, "sssd[proxy_child[%s]]", domain);
+ if (!srv_name) return 2;
+
+ conf_entry = talloc_asprintf(NULL, CONFDB_DOMAIN_PATH_TMPL, domain);
+ if (!conf_entry) return 2;
+
+ ret = server_setup(srv_name, 0, conf_entry, &main_ctx);
+ if (ret != EOK) {
+ DEBUG(0, ("Could not set up mainloop [%d]\n", ret));
+ return 2;
+ }
+
+ ret = unsetenv("_SSS_LOOPS");
+ if (ret != EOK) {
+ DEBUG(1, ("Failed to unset _SSS_LOOPS, "
+ "pam modules might not work as expected.\n"));
+ }
+
+ ret = confdb_get_string(main_ctx->confdb_ctx, main_ctx, conf_entry,
+ CONFDB_PROXY_PAM_TARGET, NULL, &pam_target);
+ if (ret != EOK) {
+ DEBUG(0, ("Error reading from confdb (%d) [%s]\n",
+ ret, strerror(ret)));
+ return 4;
+ }
+ if (pam_target == NULL) {
+ DEBUG(1, ("Missing option proxy_pam_target.\n"));
+ return 4;
+ }
+
+ ret = die_if_parent_died();
+ if (ret != EOK) {
+ /* This is not fatal, don't return */
+ DEBUG(2, ("Could not set up to exit when parent process does\n"));
+ }
+
+ ret = proxy_child_process_init(main_ctx, domain, main_ctx->event_ctx,
+ main_ctx->confdb_ctx, pam_target,
+ (uint32_t)id);
+ if (ret != EOK) {
+ DEBUG(0, ("Could not initialize proxy child [%d].\n", ret));
+ return 3;
+ }
+
+ DEBUG(1, ("Proxy child for domain [%s] started!\n", domain));
+
+ /* loop on main */
+ server_loop(main_ctx);
+
+ return 0;
+}