diff options
Diffstat (limited to 'server/responder')
| -rw-r--r-- | server/responder/common/responder_cmd.c | 78 | ||||
| -rw-r--r-- | server/responder/common/responder_cmd.h | 71 | ||||
| -rw-r--r-- | server/responder/common/responder_common.c | 518 | ||||
| -rw-r--r-- | server/responder/common/responder_common.h | 24 | ||||
| -rw-r--r-- | server/responder/common/responder_dp.c | 123 | ||||
| -rw-r--r-- | server/responder/common/responder_dp.h | 4 | ||||
| -rw-r--r-- | server/responder/common/responder_packet.c | 220 | ||||
| -rw-r--r-- | server/responder/common/responder_packet.h | 39 | ||||
| -rw-r--r-- | server/responder/nss/nsssrv.c | 590 | ||||
| -rw-r--r-- | server/responder/nss/nsssrv.h | 118 | ||||
| -rw-r--r-- | server/responder/nss/nsssrv_cmd.c | 2238 | ||||
| -rw-r--r-- | server/responder/nss/nsssrv_dp.c | 433 | ||||
| -rw-r--r-- | server/responder/pam/pamsrv.c | 171 | ||||
| -rw-r--r-- | server/responder/pam/pamsrv.h | 33 | ||||
| -rw-r--r-- | server/responder/pam/pamsrv_cmd.c | 196 | ||||
| -rw-r--r-- | server/responder/pam/pamsrv_dp.c | 215 | ||||
| -rw-r--r-- | server/responder/pam/pamsrv_util.c | 16 |
17 files changed, 5087 insertions, 0 deletions
diff --git a/server/responder/common/responder_cmd.c b/server/responder/common/responder_cmd.c new file mode 100644 index 00000000..83d55e65 --- /dev/null +++ b/server/responder/common/responder_cmd.c @@ -0,0 +1,78 @@ +/* + SSSD + + SSS Client Responder, command parser + + Copyright (C) Simo Sorce <ssorce@redhat.com> 2008 + + 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 <errno.h> +#include "util/util.h" +#include "responder/common/responder_cmd.h" +#include "responder/common/responder_packet.h" + + +void sss_cmd_done(struct sss_cmd_ctx *nctx) +{ + /* now that the packet is in place, unlock queue + * making the event writable */ + EVENT_FD_WRITEABLE(nctx->cctx->cfde); + + /* free all request related data through the talloc hierarchy */ + talloc_free(nctx); +} + +int sss_cmd_get_version(struct cli_ctx *cctx) +{ + struct sss_cmd_ctx *nctx; + uint8_t *body; + size_t blen; + int ret; + + nctx = talloc(cctx, struct sss_cmd_ctx); + if (!nctx) { + return ENOMEM; + } + nctx->cctx = cctx; + + /* create response packet */ + ret = sss_packet_new(cctx->creq, sizeof(uint32_t), + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + return ret; + } + sss_packet_get_body(cctx->creq->out, &body, &blen); + ((uint32_t *)body)[0] = SSS_PROTOCOL_VERSION; + + sss_cmd_done(nctx); + return EOK; +} + +int sss_cmd_execute(struct cli_ctx *cctx, struct sss_cmd_table *sss_cmds) +{ + enum sss_cli_command cmd; + int i; + + cmd = sss_packet_get_cmd(cctx->creq->in); + + for (i = 0; sss_cmds[i].cmd != SSS_CLI_NULL; i++) { + if (cmd == sss_cmds[i].cmd) { + return sss_cmds[i].fn(cctx); + } + } + + return EINVAL; +} diff --git a/server/responder/common/responder_cmd.h b/server/responder/common/responder_cmd.h new file mode 100644 index 00000000..ee094ad3 --- /dev/null +++ b/server/responder/common/responder_cmd.h @@ -0,0 +1,71 @@ +/* + SSSD + + SSS Client Responder, header file + + Copyright (C) Simo Sorce <ssorce@redhat.com> 2008 + + 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 __SSSSRV_CMD_H__ +#define __SSSSRV_CMD_H__ + +#include <stdint.h> +#include <sys/un.h> +#include "talloc.h" +#include "tevent.h" +#include "ldb.h" +#include "../sss_client/sss_cli.h" + +/* needed until nsssrv.h is updated */ +#ifndef __NSSSRV_H__ +struct cli_request { + + /* original request from the wire */ + struct sss_packet *in; + + /* reply data */ + struct sss_packet *out; +}; + +struct cli_ctx { + struct event_context *ev; + struct nss_ctx *nctx; + int cfd; + struct fd_event *cfde; + struct sockaddr_un addr; + struct cli_request *creq; + struct getent_ctx *gctx; +}; +#endif + +struct sss_cmd_ctx { + struct cli_ctx *cctx; + const char *domain; + const char *name; + uid_t id; + bool check_expiration; +}; + +struct sss_cmd_table { + enum sss_cli_command cmd; + int (*fn)(struct cli_ctx *cctx); +}; + +int sss_cmd_execute(struct cli_ctx *cctx, struct sss_cmd_table *sss_cmds); +void sss_cmd_done(struct sss_cmd_ctx *nctx); +int sss_cmd_get_version(struct cli_ctx *cctx); + +#endif /* __SSSSRV_CMD_H__ */ diff --git a/server/responder/common/responder_common.c b/server/responder/common/responder_common.c new file mode 100644 index 00000000..b5db7d1e --- /dev/null +++ b/server/responder/common/responder_common.c @@ -0,0 +1,518 @@ +/* + SSSD + + Common Responder methods + + Copyright (C) Simo Sorce <ssorce@redhat.com> 2008 + + 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 "popt.h" +#include "util/util.h" +#include "responder/nss/nsssrv.h" +#include "db/sysdb.h" +#include "confdb/confdb.h" +#include "dbus/dbus.h" +#include "sbus/sssd_dbus.h" +#include "util/btreemap.h" +#include "responder/common/responder_packet.h" +#include "responder/common/responder_cmd.h" +#include "responder/common/responder_dp.h" +#include "providers/data_provider.h" +#include "monitor/monitor_sbus.h" +#include "monitor/monitor_interfaces.h" +#include "sbus/sbus_client.h" + +static void set_nonblocking(int fd) +{ + unsigned v; + v = fcntl(fd, F_GETFL, 0); + fcntl(fd, F_SETFL, v | O_NONBLOCK); +} + +static void set_close_on_exec(int fd) +{ + unsigned v; + v = fcntl(fd, F_GETFD, 0); + fcntl(fd, F_SETFD, v | FD_CLOEXEC); +} + +static int client_destructor(struct cli_ctx *ctx) +{ + if (ctx->cfd > 0) close(ctx->cfd); + return 0; +} + +static void client_send(struct event_context *ev, struct cli_ctx *cctx) +{ + int ret; + + ret = sss_packet_send(cctx->creq->out, cctx->cfd); + if (ret == EAGAIN) { + /* not all data was sent, loop again */ + return; + } + if (ret != EOK) { + DEBUG(0, ("Failed to read request, aborting client!\n")); + talloc_free(cctx); + return; + } + + /* ok all sent */ + EVENT_FD_NOT_WRITEABLE(cctx->cfde); + EVENT_FD_READABLE(cctx->cfde); + talloc_free(cctx->creq); + cctx->creq = NULL; + return; +} + +static void client_recv(struct event_context *ev, struct cli_ctx *cctx) +{ + int ret; + + if (!cctx->creq) { + cctx->creq = talloc_zero(cctx, struct cli_request); + if (!cctx->creq) { + DEBUG(0, ("Failed to alloc request, aborting client!\n")); + talloc_free(cctx); + return; + } + } + + if (!cctx->creq->in) { + ret = sss_packet_new(cctx->creq, NSS_PACKET_MAX_RECV_SIZE, + 0, &cctx->creq->in); + if (ret != EOK) { + DEBUG(0, ("Failed to alloc request, aborting client!\n")); + talloc_free(cctx); + return; + } + } + + ret = sss_packet_recv(cctx->creq->in, cctx->cfd); + switch (ret) { + case EOK: + /* do not read anymore */ + EVENT_FD_NOT_READABLE(cctx->cfde); + /* execute command */ + ret = sss_cmd_execute(cctx, cctx->nctx->sss_cmds); + if (ret != EOK) { + DEBUG(0, ("Failed to execute request, aborting client!\n")); + talloc_free(cctx); + } + /* past this point cctx can be freed at any time by callbacks + * in case of error, do not use it */ + return; + + case EAGAIN: + /* need to read still some data, loop again */ + break; + + case EINVAL: + DEBUG(6, ("Invalid data from client, closing connection!\n")); + talloc_free(cctx); + break; + + case ENODATA: + DEBUG(5, ("Client disconnected!\n")); + talloc_free(cctx); + break; + + default: + DEBUG(6, ("Failed to read request, aborting client!\n")); + talloc_free(cctx); + } + + return; +} + +static void client_fd_handler(struct event_context *ev, + struct fd_event *fde, + uint16_t flags, void *ptr) +{ + struct cli_ctx *cctx = talloc_get_type(ptr, struct cli_ctx); + + if (flags & EVENT_FD_READ) { + client_recv(ev, cctx); + return; + } + if (flags & EVENT_FD_WRITE) { + client_send(ev, cctx); + return; + } +} + +static void accept_fd_handler(struct event_context *ev, + struct fd_event *fde, + uint16_t flags, void *ptr) +{ + /* accept and attach new event handler */ + struct nss_ctx *nctx = talloc_get_type(ptr, struct nss_ctx); + struct cli_ctx *cctx; + socklen_t len; + + cctx = talloc_zero(nctx, struct cli_ctx); + if (!cctx) { + struct sockaddr_un addr; + int fd; + DEBUG(0, ("Out of memory trying to setup client context!\n")); + /* accept and close to signal the client we have a problem */ + memset(&addr, 0, sizeof(addr)); + len = sizeof(addr); + fd = accept(nctx->lfd, (struct sockaddr *)&addr, &len); + if (fd == -1) { + return; + } + close(fd); + return; + } + + len = sizeof(cctx->addr); + cctx->cfd = accept(nctx->lfd, (struct sockaddr *)&cctx->addr, &len); + if (cctx->cfd == -1) { + DEBUG(1, ("Accept failed [%s]", strerror(errno))); + talloc_free(cctx); + return; + } + + cctx->cfde = event_add_fd(ev, cctx, cctx->cfd, + EVENT_FD_READ, client_fd_handler, cctx); + if (!cctx->cfde) { + close(cctx->cfd); + talloc_free(cctx); + DEBUG(2, ("Failed to queue client handler\n")); + } + + cctx->ev = ev; + cctx->nctx = nctx; + + talloc_set_destructor(cctx, client_destructor); + + DEBUG(4, ("Client connected!\n")); + + return; +} + +static int sss_sbus_init(struct nss_ctx *nctx) +{ + int ret; + char *sbus_address; + struct service_sbus_ctx *ss_ctx; + struct sbus_method_ctx *sm_ctx; + + /* Set up SBUS connection to the monitor */ + ret = monitor_get_sbus_address(nctx, nctx->cdb, &sbus_address); + if (ret != EOK) { + DEBUG(0, ("Could not locate monitor address.\n")); + return ret; + } + + ret = monitor_init_sbus_methods(nctx, nctx->sss_sbus_methods, &sm_ctx); + if (ret != EOK) { + DEBUG(0, ("Could not initialize SBUS methods.\n")); + return ret; + } + + ret = sbus_client_init(nctx, nctx->ev, + sbus_address, sm_ctx, + NULL /* Private Data */, + NULL /* Destructor */, + &ss_ctx); + if (ret != EOK) { + DEBUG(0, ("Failed to connect to monitor services.\n")); + return ret; + } + + /* Set up NSS-specific listeners */ + /* None currently used */ + + nctx->ss_ctx = ss_ctx; + + return EOK; +} + +/* create a unix socket and listen to it */ +static int set_unix_socket(struct nss_ctx *nctx) +{ + struct sockaddr_un addr; + char *default_pipe; + int ret; + + default_pipe = talloc_asprintf(nctx, "%s/%s", PIPE_PATH, + nctx->sss_pipe_name); + if (!default_pipe) { + return ENOMEM; + } + + ret = confdb_get_string(nctx->cdb, nctx, + nctx->confdb_socket_path, "unixSocket", + default_pipe, &nctx->sock_name); + if (ret != EOK) { + talloc_free(default_pipe); + return ret; + } + talloc_free(default_pipe); + + nctx->lfd = socket(AF_UNIX, SOCK_STREAM, 0); + if (nctx->lfd == -1) { + return EIO; + } + + /* Set the umask so that permissions are set right on the socket. + * It must be readable and writable by anybody on the system. */ + umask(0111); + + set_nonblocking(nctx->lfd); + set_close_on_exec(nctx->lfd); + + memset(&addr, 0, sizeof(addr)); + addr.sun_family = AF_UNIX; + strncpy(addr.sun_path, nctx->sock_name, sizeof(addr.sun_path)); + + /* make sure we have no old sockets around */ + unlink(nctx->sock_name); + + if (bind(nctx->lfd, (struct sockaddr *)&addr, sizeof(addr)) == -1) { + DEBUG(0,("Unable to bind on socket '%s'\n", nctx->sock_name)); + goto failed; + } + if (listen(nctx->lfd, 10) != 0) { + DEBUG(0,("Unable to listen on socket '%s'\n", nctx->sock_name)); + goto failed; + } + + nctx->lfde = event_add_fd(nctx->ev, nctx, nctx->lfd, + EVENT_FD_READ, accept_fd_handler, nctx); + + /* we want default permissions on created files to be very strict, + so set our umask to 0177 */ + umask(0177); + return EOK; + +failed: + /* we want default permissions on created files to be very strict, + so set our umask to 0177 */ + umask(0177); + close(nctx->lfd); + return EIO; +} + +/* domain names are case insensitive for now + * NOTE: this function is not utf-8 safe, + * only ASCII names for now */ +static int _domain_comparator(const void *key1, const void *key2) +{ + return strcasecmp((const char *)key1, (const char *)key2); +} + +static int sss_init_domains(struct nss_ctx *nctx) +{ + char *path; + char **domains; + char *provider; + TALLOC_CTX *tmp_ctx; + struct nss_domain_info *info; + int ret, i, c; + int retval; + + tmp_ctx = talloc_new(nctx); + ret = confdb_get_domains(nctx->cdb, tmp_ctx, &domains); + if (ret != EOK) { + retval = ret; + goto done; + } + + i = 0; + c = 0; + while (domains[i] != NULL) { + DEBUG(3, ("Adding domain %s to the map\n", domains[i])); + + path = talloc_asprintf(tmp_ctx, "config/domains/%s", domains[i]); + if (!path) { + retval = ENOMEM; + goto done; + } + + /* alloc on tmp_ctx, it will be stolen by btreemap_set_value */ + info = talloc_zero(tmp_ctx, struct nss_domain_info); + if (!info) { + retval = ENOMEM; + goto done; + } + + /* Build the basedn for this domain */ + info->basedn = talloc_asprintf(info, SYSDB_DOM_BASE, domains[i]); + DEBUG(3, ("BaseDN: %s\n", info->basedn)); + + ret = confdb_get_int(nctx->cdb, tmp_ctx, path, + "enumerate", false, &(info->enumerate)); + if (ret != EOK) { + DEBUG(0, ("Failed to fetch enumerate for [%s]!\n", domains[i])); + } + + ret = confdb_get_bool(nctx->cdb, tmp_ctx, path, + "legacy", false, &(info->legacy)); + if (ret != EOK) { + DEBUG(0, ("Failed to fetch legacy for [%s]!\n", domains[i])); + } + + ret = confdb_get_string(nctx->cdb, tmp_ctx, path, "provider", + NULL, &provider); + if (ret != EOK) { + DEBUG(0, ("Failed to fetch provider for [%s]!\n", domains[i])); + } + if (provider) info->has_provider = true; + + ret = btreemap_set_value(nctx, &nctx->domain_map, + domains[i], info, + _domain_comparator); + if (ret != EOK) { + DEBUG(1, ("Failed to store domain info, aborting!\n")); + retval = ret; + goto done; + } + + i++; + c++; + } + if (c == 0) { + /* No domains configured! + * Note: this should never happen, since LOCAL should + * always be configured */ + DEBUG(0, ("No domains configured on this client!\n")); + retval = EINVAL; + goto done; + } + + ret = confdb_get_string(nctx->cdb, nctx, + "config/domains", "default", + NULL, &nctx->default_domain); + if (ret != EOK) { + retval = ret; + goto done; + } + + retval = EOK; + +done: + talloc_free(tmp_ctx); + return retval; +} + +int sss_process_init(TALLOC_CTX *mem_ctx, + struct event_context *ev, + struct confdb_ctx *cdb, + struct sbus_method sss_sbus_methods[], + struct sss_cmd_table sss_cmds[], + const char *sss_pipe_name, + const char *confdb_socket_path, + struct sbus_method dp_methods[]) +{ + struct nss_ctx *nctx; + int ret; + + nctx = talloc_zero(mem_ctx, struct nss_ctx); + if (!nctx) { + DEBUG(0, ("fatal error initializing nss_ctx\n")); + return ENOMEM; + } + nctx->ev = ev; + nctx->cdb = cdb; + nctx->sss_sbus_methods = sss_sbus_methods; + nctx->sss_cmds = sss_cmds; + nctx->sss_pipe_name = sss_pipe_name; + nctx->confdb_socket_path = confdb_socket_path; + nctx->dp_methods = dp_methods; + + ret = sss_init_domains(nctx); + if (ret != EOK) { + DEBUG(0, ("fatal error setting up domain map\n")); + return ret; + } + + ret = sss_sbus_init(nctx); + if (ret != EOK) { + DEBUG(0, ("fatal error setting up message bus\n")); + return ret; + } + + ret = sss_dp_init(nctx, nctx->dp_methods); + if (ret != EOK) { + DEBUG(0, ("fatal error setting up backend connector\n")); + return ret; + } + + ret = sysdb_init(nctx, ev, cdb, NULL, &nctx->sysdb); + if (ret != EOK) { + DEBUG(0, ("fatal error initializing nss_ctx\n")); + return ret; + } + + /* after all initializations we are ready to listen on our socket */ + ret = set_unix_socket(nctx); + if (ret != EOK) { + DEBUG(0, ("fatal error initializing socket\n")); + return ret; + } + + nctx->cache_timeout = 600; /* FIXME: read from conf */ + + DEBUG(1, ("NSS Initialization complete\n")); + + return EOK; +} + +int sss_parse_name(TALLOC_CTX *memctx, + const char *fullname, + struct btreemap *domain_map, + const char **domain, const char **name) { + char *delim; + struct btreemap *node; + int ret; + + if ((delim = strchr(fullname, NSS_DOMAIN_DELIM)) != NULL) { + + /* Check for registered domain */ + ret = btreemap_search_key(domain_map, (void *)(delim+1), &node); + if (ret != BTREEMAP_FOUND) { + /* No such domain was registered. Return EINVAL. + * TODO: alternative approach? + * Alternatively, we could simply fail down to + * below, treating the entire construct as the + * full name if the domain is unspecified. + */ + return EINVAL; + } + + *name = talloc_strndup(memctx, fullname, delim-fullname); + *domain = talloc_strdup(memctx, delim+1); + } + else { + *name = talloc_strdup(memctx, fullname); + *domain = NULL; + } + + return EOK; +} diff --git a/server/responder/common/responder_common.h b/server/responder/common/responder_common.h new file mode 100644 index 00000000..433b242e --- /dev/null +++ b/server/responder/common/responder_common.h @@ -0,0 +1,24 @@ +#include "sbus/sssd_dbus.h" +#include "responder/common/responder_cmd.h" +#include "util/btreemap.h" + +/* SSS_DOMAIN_DELIM can be specified in config.h */ +#include "config.h" +#ifndef SSS_DOMAIN_DELIM +#define SSS_DOMAIN_DELIM '@' +#endif + + +int sss_process_init(TALLOC_CTX *mem_ctx, + struct event_context *ev, + struct confdb_ctx *cdb, + struct sbus_method sss_sbus_methods[], + struct sss_cmd_table sss_cmds[], + const char *sss_pipe_name, + const char *confdb_socket_path, + struct sbus_method dp_methods[]); + +int sss_parse_name(TALLOC_CTX *memctx, + const char *fullname, + struct btreemap *domain_map, + const char **domain, const char **name); diff --git a/server/responder/common/responder_dp.c b/server/responder/common/responder_dp.c new file mode 100644 index 00000000..a024674b --- /dev/null +++ b/server/responder/common/responder_dp.c @@ -0,0 +1,123 @@ + +#include <sys/time.h> +#include <time.h> +#include "responder/nss/nsssrv.h" +#include "util/util.h" +#include "responder/common/responder_packet.h" +#include "responder/common/responder_common.h" +#include "providers/data_provider.h" +#include "sbus/sbus_client.h" +#include "providers/dp_sbus.h" + +struct sss_dp_pvt_ctx { + struct nss_ctx *nctx; + struct sbus_method *methods; + time_t last_retry; + int retries; +}; + +static int sss_dp_conn_destructor(void *data); +static void sss_dp_reconnect(struct event_context *ev, + struct timed_event *te, + struct timeval tv, void *data); + +static void sss_dp_conn_reconnect(struct sss_dp_pvt_ctx *pvt) +{ + struct nss_ctx *nctx; + struct timed_event *te; + struct timeval tv; + struct sbus_method_ctx *sm_ctx; + char *sbus_address; + time_t now; + int ret; + + now = time(NULL); + + /* reset retry if last reconnect was > 60 sec. ago */ + if (pvt->last_retry + 60 < now) pvt->retries = 0; + if (pvt->retries >= 3) { + DEBUG(4, ("Too many reconnect retries! Giving up\n")); + return; + } + + pvt->last_retry = now; + pvt->retries++; + + nctx = pvt->nctx; + + ret = dp_get_sbus_address(nctx, nctx->cdb, &sbus_address); + if (ret != EOK) { + DEBUG(0, ("Could not locate data provider address.\n")); + return; + } + + ret = dp_init_sbus_methods(nctx, pvt->methods, &sm_ctx); + if (ret != EOK) { + DEBUG(0, ("Could not initialize SBUS methods.\n")); + return; + } + + ret = sbus_client_init(nctx, nctx->ev, + sbus_address, sm_ctx, + pvt, sss_dp_conn_destructor, + &nctx->dp_ctx); + if (ret != EOK) { + DEBUG(4, ("Failed to reconnect [%d(%s)]!\n", ret, strerror(ret))); + + tv.tv_sec = now +5; + tv.tv_usec = 0; + te = event_add_timed(nctx->ev, nctx, tv, sss_dp_reconnect, pvt); + if (te == NULL) { + DEBUG(4, ("Failed to add timed event! Giving up\n")); + } else { + DEBUG(4, ("Retrying in 5 seconds\n")); + } + } +} + +static void sss_dp_reconnect(struct event_context *ev, + struct timed_event *te, + struct timeval tv, void *data) +{ + struct sss_dp_pvt_ctx *pvt; + + pvt = talloc_get_type(data, struct sss_dp_pvt_ctx); + + sss_dp_conn_reconnect(pvt); +} + +int sss_dp_conn_destructor(void *data) +{ + struct sss_dp_pvt_ctx *pvt; + struct sbus_conn_ctx *scon; + + scon = talloc_get_type(data, struct sbus_conn_ctx); + if (!scon) return 0; + + /* if this is a regular disconnect just quit */ + if (sbus_conn_disconnecting(scon)) return 0; + + pvt = talloc_get_type(sbus_conn_get_private_data(scon), + struct sss_dp_pvt_ctx); + if (pvt) return 0; + + sss_dp_conn_reconnect(pvt); + + return 0; +} + +int sss_dp_init(struct nss_ctx *nctx, struct sbus_method *dp_methods) +{ + struct sss_dp_pvt_ctx *pvt; + + pvt = talloc_zero(nctx, struct sss_dp_pvt_ctx); + if (!pvt) return ENOMEM; + + pvt->nctx = nctx; + pvt->methods = dp_methods; + + sss_dp_conn_reconnect(pvt); + + return EOK; +} + diff --git a/server/responder/common/responder_dp.h b/server/responder/common/responder_dp.h new file mode 100644 index 00000000..2eeddf5b --- /dev/null +++ b/server/responder/common/responder_dp.h @@ -0,0 +1,4 @@ +#include "responder/nss/nsssrv.h" +#include "sbus/sssd_dbus.h" + +int sss_dp_init(struct nss_ctx *nctx, struct sbus_method dp_methods[]); diff --git a/server/responder/common/responder_packet.c b/server/responder/common/responder_packet.c new file mode 100644 index 00000000..24762934 --- /dev/null +++ b/server/responder/common/responder_packet.c @@ -0,0 +1,220 @@ +/* + SSSD + + SSS Client Responder, command parser + + Copyright (C) Simo Sorce <ssorce@redhat.com> 2008 + + 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 <sys/types.h> +#include <sys/socket.h> +#include <string.h> +#include <errno.h> +#include "talloc.h" +#include "util/util.h" +#include "responder/common/responder_packet.h" + +#define SSSSRV_PACKET_MEM_SIZE 512 + +struct sss_packet { + size_t memsize; + uint8_t *buffer; + + /* header */ + uint32_t *len; + uint32_t *cmd; + uint32_t *status; + uint32_t *reserved; + + uint8_t *body; + + /* io pointer */ + size_t iop; +}; + +/* + * Allocate a new packet structure + * + * - if size is defined use it otherwise the default packet will be + * SSSSRV_PACKET_MEM_SIZE bytes. + */ +int sss_packet_new(TALLOC_CTX *mem_ctx, size_t size, + enum sss_cli_command cmd, + struct sss_packet **rpacket) +{ + struct sss_packet *packet; + + packet = talloc(mem_ctx, struct sss_packet); + if (!packet) return ENOMEM; + + if (size) { + int n = (size + SSS_NSS_HEADER_SIZE) % SSSSRV_PACKET_MEM_SIZE; + packet->memsize = (n + 1) * SSSSRV_PACKET_MEM_SIZE; + } else { + packet->memsize = SSSSRV_PACKET_MEM_SIZE; + } + + packet->buffer = talloc_size(packet, packet->memsize); + if (!packet->buffer) { + talloc_free(packet); + return ENOMEM; + } + memset(packet->buffer, 0, SSS_NSS_HEADER_SIZE); + + packet->len = &((uint32_t *)packet->buffer)[0]; + packet->cmd = &((uint32_t *)packet->buffer)[1]; + packet->status = &((uint32_t *)packet->buffer)[2]; + packet->reserved = &((uint32_t *)packet->buffer)[3]; + packet->body = (uint8_t *)&((uint32_t *)packet->buffer)[4]; + + *(packet->len) = size + SSS_NSS_HEADER_SIZE; + *(packet->cmd) = cmd; + + packet->iop = 0; + + *rpacket = packet; + + return EOK; +} + +/* grows a packet size only in SSSSRV_PACKET_MEM_SIZE chunks */ +int sss_packet_grow(struct sss_packet *packet, size_t size) +{ + size_t totlen, len; + uint8_t *newmem; + + if (size == 0) { + return EOK; + } + + totlen = packet->memsize; + len = *packet->len + size; + + /* make sure we do not overflow */ + if (totlen < len) { + int n = len % SSSSRV_PACKET_MEM_SIZE + 1; + totlen += n * SSSSRV_PACKET_MEM_SIZE; + if (totlen < len) { + return EINVAL; + } + } + + if (totlen > packet->memsize) { + newmem = talloc_realloc_size(packet, packet->buffer, totlen); + if (!newmem) { + return ENOMEM; + } + + packet->memsize = totlen; + packet->buffer = newmem; + packet->len = &((uint32_t *)packet->buffer)[0]; + packet->cmd = &((uint32_t *)packet->buffer)[1]; + packet->status = &((uint32_t *)packet->buffer)[2]; + packet->reserved = &((uint32_t *)packet->buffer)[3]; + packet->body = (uint8_t *)&((uint32_t *)packet->buffer)[4]; + } + + *(packet->len) += size; + + return 0; +} + +int sss_packet_recv(struct sss_packet *packet, int fd) +{ + size_t rb; + size_t len; + void *buf; + + buf = packet->buffer + packet->iop; + if (packet->iop > 4) len = *packet->len - packet->iop; + else len = packet->memsize - packet->iop; + + /* check for wrapping */ + if (len > packet->memsize) { + return EINVAL; + } + + errno = 0; + rb = recv(fd, buf, len, 0); + + if (rb == -1 && errno == EAGAIN) { + return EAGAIN; + } + + if (rb == 0) { + return ENODATA; + } + + if (*packet->len > packet->memsize) { + return EINVAL; + } + + packet->iop += rb; + if (packet->iop < 4) { + return EAGAIN; + } + + if (packet->iop < *packet->len) { + return EAGAIN; + } + + return EOK; +} + +int sss_packet_send(struct sss_packet *packet, int fd) +{ + size_t rb; + size_t len; + void *buf; + + buf = packet->buffer + packet->iop; + len = *packet->len - packet->iop; + + errno = 0; + rb = send(fd, buf, len, 0); + + if (rb == -1 && errno == EAGAIN) { + return EAGAIN; + } + + if (rb == 0) { + return EIO; + } + + packet->iop += rb; + + if (packet->iop < *packet->len) { + return EAGAIN; + } + + return EOK; +} + +enum sss_cli_command sss_packet_get_cmd(struct sss_packet *packet) +{ + return (enum sss_cli_command)(*packet->cmd); +} + +void sss_packet_get_body(struct sss_packet *packet, uint8_t **body, size_t *blen) +{ + *body = packet->body; + *blen = *packet->len - SSS_NSS_HEADER_SIZE; +} + +void sss_packet_set_error(struct sss_packet *packet, int error) +{ + *(packet->status) = error; +} diff --git a/server/responder/common/responder_packet.h b/server/responder/common/responder_packet.h new file mode 100644 index 00000000..1a852946 --- /dev/null +++ b/server/responder/common/responder_packet.h @@ -0,0 +1,39 @@ +/* + SSSD + + SSS Client Responder, header file + + Copyright (C) Simo Sorce <ssorce@redhat.com> 2008 + + 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 __SSSSRV_PACKET_H__ +#define __SSSSRV_PACKET_H__ + +#include "../sss_client/sss_cli.h" + +struct sss_packet; + +int sss_packet_new(TALLOC_CTX *mem_ctx, size_t size, + enum sss_cli_command cmd, + struct sss_packet **rpacket); +int sss_packet_grow(struct sss_packet *packet, size_t size); +int sss_packet_recv(struct sss_packet *packet, int fd); +int sss_packet_send(struct sss_packet *packet, int fd); +enum sss_cli_command sss_packet_get_cmd(struct sss_packet *packet); +void sss_packet_get_body(struct sss_packet *packet, uint8_t **body, size_t *blen); +void sss_packet_set_error(struct sss_packet *packet, int error); + +#endif /* __SSSSRV_PACKET_H__ */ diff --git a/server/responder/nss/nsssrv.c b/server/responder/nss/nsssrv.c new file mode 100644 index 00000000..93490c46 --- /dev/null +++ b/server/responder/nss/nsssrv.c @@ -0,0 +1,590 @@ +/* + SSSD + + NSS Responder + + Copyright (C) Simo Sorce <ssorce@redhat.com> 2008 + + 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 "popt.h" +#include "util/util.h" +#include "responder/nss/nsssrv.h" +#include "db/sysdb.h" +#include "confdb/confdb.h" +#include "dbus/dbus.h" +#include "sbus/sssd_dbus.h" +#include "util/btreemap.h" +#include "responder/common/responder_packet.h" +#include "providers/data_provider.h" +#include "monitor/monitor_sbus.h" +#include "monitor/monitor_interfaces.h" +#include "sbus/sbus_client.h" + +#define SSS_NSS_PIPE_NAME "nss" + +static int service_identity(DBusMessage *message, struct sbus_conn_ctx *sconn); +static int service_pong(DBusMessage *message, struct sbus_conn_ctx *sconn); +static int service_reload(DBusMessage *message, struct sbus_conn_ctx *sconn); +static int nss_init_domains(struct nss_ctx *nctx); +static int _domain_comparator(const void *key1, const void *key2); + +struct sbus_method nss_sbus_methods[] = { + {SERVICE_METHOD_IDENTITY, service_identity}, + {SERVICE_METHOD_PING, service_pong}, + {SERVICE_METHOD_RELOAD, service_reload}, + {NULL, NULL} +}; + +static void set_nonblocking(int fd) +{ + unsigned v; + v = fcntl(fd, F_GETFL, 0); + fcntl(fd, F_SETFL, v | O_NONBLOCK); +} + +static void set_close_on_exec(int fd) +{ + unsigned v; + v = fcntl(fd, F_GETFD, 0); + fcntl(fd, F_SETFD, v | FD_CLOEXEC); +} + +static int client_destructor(struct cli_ctx *ctx) +{ + if (ctx->cfd > 0) close(ctx->cfd); + return 0; +} + +static void client_send(struct event_context *ev, struct cli_ctx *cctx) +{ + int ret; + + ret = sss_packet_send(cctx->creq->out, cctx->cfd); + if (ret == EAGAIN) { + /* not all data was sent, loop again */ + return; + } + if (ret != EOK) { + DEBUG(0, ("Failed to read request, aborting client!\n")); + talloc_free(cctx); + return; + } + + /* ok all sent */ + EVENT_FD_NOT_WRITEABLE(cctx->cfde); + EVENT_FD_READABLE(cctx->cfde); + talloc_free(cctx->creq); + cctx->creq = NULL; + return; +} + +static void client_recv(struct event_context *ev, struct cli_ctx *cctx) +{ + int ret; + + if (!cctx->creq) { + cctx->creq = talloc_zero(cctx, struct cli_request); + if (!cctx->creq) { + DEBUG(0, ("Failed to alloc request, aborting client!\n")); + talloc_free(cctx); + return; + } + } + + if (!cctx->creq->in) { + ret = sss_packet_new(cctx->creq, NSS_PACKET_MAX_RECV_SIZE, + 0, &cctx->creq->in); + if (ret != EOK) { + DEBUG(0, ("Failed to alloc request, aborting client!\n")); + talloc_free(cctx); + return; + } + } + + ret = sss_packet_recv(cctx->creq->in, cctx->cfd); + switch (ret) { + case EOK: + /* do not read anymore */ + EVENT_FD_NOT_READABLE(cctx->cfde); + /* execute command */ + ret = nss_cmd_execute(cctx); + if (ret != EOK) { + DEBUG(0, ("Failed to execute request, aborting client!\n")); + talloc_free(cctx); + } + /* past this point cctx can be freed at any time by callbacks + * in case of error, do not use it */ + return; + + case EAGAIN: + /* need to read still some data, loop again */ + break; + + case EINVAL: + DEBUG(6, ("Invalid data from client, closing connection!\n")); + talloc_free(cctx); + break; + + case ENODATA: + DEBUG(5, ("Client disconnected!\n")); + talloc_free(cctx); + break; + + default: + DEBUG(6, ("Failed to read request, aborting client!\n")); + talloc_free(cctx); + } + + return; +} + +static void client_fd_handler(struct event_context *ev, + struct fd_event *fde, + uint16_t flags, void *ptr) +{ + struct cli_ctx *cctx = talloc_get_type(ptr, struct cli_ctx); + + if (flags & EVENT_FD_READ) { + client_recv(ev, cctx); + return; + } + if (flags & EVENT_FD_WRITE) { + client_send(ev, cctx); + return; + } +} + +static void accept_fd_handler(struct event_context *ev, + struct fd_event *fde, + uint16_t flags, void *ptr) +{ + /* accept and attach new event handler */ + struct nss_ctx *nctx = talloc_get_type(ptr, struct nss_ctx); + struct cli_ctx *cctx; + socklen_t len; + + cctx = talloc_zero(nctx, struct cli_ctx); + if (!cctx) { + struct sockaddr_un addr; + int fd; + DEBUG(0, ("Out of memory trying to setup client context!\n")); + /* accept and close to signal the client we have a problem */ + memset(&addr, 0, sizeof(addr)); + len = sizeof(addr); + fd = accept(nctx->lfd, (struct sockaddr *)&addr, &len); + if (fd == -1) { + return; + } + close(fd); + return; + } + + len = sizeof(cctx->addr); + cctx->cfd = accept(nctx->lfd, (struct sockaddr *)&cctx->addr, &len); + if (cctx->cfd == -1) { + DEBUG(1, ("Accept failed [%s]", strerror(errno))); + talloc_free(cctx); + return; + } + + cctx->cfde = event_add_fd(ev, cctx, cctx->cfd, + EVENT_FD_READ, client_fd_handler, cctx); + if (!cctx->cfde) { + close(cctx->cfd); + talloc_free(cctx); + DEBUG(2, ("Failed to queue client handler\n")); + } + + cctx->ev = ev; + cctx->nctx = nctx; + + talloc_set_destructor(cctx, client_destructor); + + DEBUG(4, ("Client connected!\n")); + + return; +} + +static int service_identity(DBusMessage *message, struct sbus_conn_ctx *sconn) +{ + dbus_uint16_t version = NSS_SBUS_SERVICE_VERSION; + const char *name = NSS_SBUS_SERVICE_NAME; + DBusMessage *reply; + dbus_bool_t ret; + + DEBUG(4,("Sending ID reply: (%s,%d)\n", + name, version)); + + reply = dbus_message_new_method_return(message); + if (!reply) return ENOMEM; + + ret = dbus_message_append_args(reply, + DBUS_TYPE_STRING, &name, + DBUS_TYPE_UINT16, &version, + DBUS_TYPE_INVALID); + if (!ret) { + dbus_message_unref(reply); + return EIO; + } + + /* send reply back */ + sbus_conn_send_reply(sconn, reply); + dbus_message_unref(reply); + + return EOK; +} + +static int service_pong(DBusMessage *message, struct sbus_conn_ctx *sconn) +{ + DBusMessage *reply; + dbus_bool_t ret; + + reply = dbus_message_new_method_return(message); + if (!reply) return ENOMEM; + + ret = dbus_message_append_args(reply, DBUS_TYPE_INVALID); + if (!ret) { + dbus_message_unref(reply); + return EIO; + } + + /* send reply back */ + sbus_conn_send_reply(sconn, reply); + dbus_message_unref(reply); + + return EOK; +} + +static int service_reload(DBusMessage *message, struct sbus_conn_ctx *sconn) +{ + /* Monitor calls this function when we need to reload + * our configuration information. Perform whatever steps + * are needed to update the configuration objects. + */ + + /* Send an empty reply to acknowledge receipt */ + return service_pong(message, sconn); +} + +static int nss_sbus_init(struct nss_ctx *nctx) +{ + int ret; + char *sbus_address; + struct service_sbus_ctx *ss_ctx; + struct sbus_method_ctx *sm_ctx; + + /* Set up SBUS connection to the monitor */ + ret = monitor_get_sbus_address(nctx, nctx->cdb, &sbus_address); + if (ret != EOK) { + DEBUG(0, ("Could not locate monitor address.\n")); + return ret; + } + + ret = monitor_init_sbus_methods(nctx, nss_sbus_methods, &sm_ctx); + if (ret != EOK) { + DEBUG(0, ("Could not initialize SBUS methods.\n")); + return ret; + } + + ret = sbus_client_init(nctx, nctx->ev, + sbus_address, sm_ctx, + NULL /* Private Data */, + NULL /* Destructor */, + &ss_ctx); + if (ret != EOK) { + DEBUG(0, ("Failed to connect to monitor services.\n")); + return ret; + } + + /* Set up NSS-specific listeners */ + /* None currently used */ + + nctx->ss_ctx = ss_ctx; + + return EOK; +} + +/* create a unix socket and listen to it */ +static int set_unix_socket(struct nss_ctx *nctx) +{ + struct sockaddr_un addr; + char *default_pipe; + int ret; + + default_pipe = talloc_asprintf(nctx, "%s/%s", PIPE_PATH, SSS_NSS_PIPE_NAME); + if (!default_pipe) { + return ENOMEM; + } + + ret = confdb_get_string(nctx->cdb, nctx, + "config/services/nss", "unixSocket", + default_pipe, &nctx->sock_name); + if (ret != EOK) { + talloc_free(default_pipe); + return ret; + } + talloc_free(default_pipe); + + nctx->lfd = socket(AF_UNIX, SOCK_STREAM, 0); + if (nctx->lfd == -1) { + return EIO; + } + + /* Set the umask so that permissions are set right on the socket. + * It must be readable and writable by anybody on the system. */ + umask(0111); + + set_nonblocking(nctx->lfd); + set_close_on_exec(nctx->lfd); + + memset(&addr, 0, sizeof(addr)); + addr.sun_family = AF_UNIX; + strncpy(addr.sun_path, nctx->sock_name, sizeof(addr.sun_path)); + + /* make sure we have no old sockets around */ + unlink(nctx->sock_name); + + if (bind(nctx->lfd, (struct sockaddr *)&addr, sizeof(addr)) == -1) { + DEBUG(0,("Unable to bind on socket '%s'\n", nctx->sock_name)); + goto failed; + } + if (listen(nctx->lfd, 10) != 0) { + DEBUG(0,("Unable to listen on socket '%s'\n", nctx->sock_name)); + goto failed; + } + + nctx->lfde = event_add_fd(nctx->ev, nctx, nctx->lfd, + EVENT_FD_READ, accept_fd_handler, nctx); + + /* we want default permissions on created files to be very strict, + so set our umask to 0177 */ + umask(0177); + return EOK; + +failed: + /* we want default permissions on created files to be very strict, + so set our umask to 0177 */ + umask(0177); + close(nctx->lfd); + return EIO; +} + +/* domain names are case insensitive for now + * NOTE: this function is not utf-8 safe, + * only ASCII names for now */ +static int _domain_comparator(const void *key1, const void *key2) +{ + return strcasecmp((const char *)key1, (const char *)key2); +} + +static int nss_init_domains(struct nss_ctx *nctx) +{ + char *path; + char **domains; + char *provider; + TALLOC_CTX *tmp_ctx; + struct nss_domain_info *info; + int ret, i, c; + int retval; + + tmp_ctx = talloc_new(nctx); + ret = confdb_get_domains(nctx->cdb, tmp_ctx, &domains); + if (ret != EOK) { + retval = ret; + goto done; + } + + i = 0; + c = 0; + while (domains[i] != NULL) { + DEBUG(3, ("Adding domain %s to the map\n", domains[i])); + + path = talloc_asprintf(tmp_ctx, "config/domains/%s", domains[i]); + if (!path) { + retval = ENOMEM; + goto done; + } + + /* alloc on tmp_ctx, it will be stolen by btreemap_set_value */ + info = talloc_zero(tmp_ctx, struct nss_domain_info); + if (!info) { + retval = ENOMEM; + goto done; + } + + /* Build the basedn for this domain */ + info->basedn = talloc_asprintf(info, SYSDB_DOM_BASE, domains[i]); + DEBUG(3, ("BaseDN: %s\n", info->basedn)); + + ret = confdb_get_int(nctx->cdb, tmp_ctx, path, + "enumerate", false, &(info->enumerate)); + if (ret != EOK) { + DEBUG(0, ("Failed to fetch enumerate for [%s]!\n", domains[i])); + } + + ret = confdb_get_bool(nctx->cdb, tmp_ctx, path, + "legacy", false, &(info->legacy)); + if (ret != EOK) { + DEBUG(0, ("Failed to fetch legacy for [%s]!\n", domains[i])); + } + + ret = confdb_get_string(nctx->cdb, tmp_ctx, path, "provider", + NULL, &provider); + if (ret != EOK) { + DEBUG(0, ("Failed to fetch provider for [%s]!\n", domains[i])); + } + if (provider) info->has_provider = true; + + ret = btreemap_set_value(nctx, &nctx->domain_map, + domains[i], info, + _domain_comparator); + if (ret != EOK) { + DEBUG(1, ("Failed to store domain info, aborting!\n")); + retval = ret; + goto done; + } + + i++; + c++; + } + if (c == 0) { + /* No domains configured! + * Note: this should never happen, since LOCAL should + * always be configured */ + DEBUG(0, ("No domains configured on this client!\n")); + retval = EINVAL; + goto done; + } + + ret = confdb_get_string(nctx->cdb, nctx, + "config/domains", "default", + NULL, &nctx->default_domain); + if (ret != EOK) { + retval = ret; + goto done; + } + + retval = EOK; + +done: + talloc_free(tmp_ctx); + return retval; +} + +int nss_process_init(TALLOC_CTX *mem_ctx, + struct event_context *ev, + struct confdb_ctx *cdb) +{ + struct nss_ctx *nctx; + int ret; + + nctx = talloc_zero(mem_ctx, struct nss_ctx); + if (!nctx) { + DEBUG(0, ("fatal error initializing nss_ctx\n")); + return ENOMEM; + } + nctx->ev = ev; + nctx->cdb = cdb; + + ret = nss_init_domains(nctx); + if (ret != EOK) { + DEBUG(0, ("fatal error setting up domain map\n")); + return ret; + } + + ret = nss_sbus_init(nctx); + if (ret != EOK) { + DEBUG(0, ("fatal error setting up message bus\n")); + return ret; + } + + ret = nss_dp_init(nctx); + if (ret != EOK) { + DEBUG(0, ("fatal error setting up backend connector\n")); + return ret; + } + + ret = sysdb_init(nctx, ev, cdb, NULL, &nctx->sysdb); + if (ret != EOK) { + DEBUG(0, ("fatal error initializing nss_ctx\n")); + return ret; + } + + /* after all initializations we are ready to listen on our socket */ + ret = set_unix_socket(nctx); + if (ret != EOK) { + DEBUG(0, ("fatal error initializing socket\n")); + return ret; + } + + nctx->cache_timeout = 600; /* FIXME: read from conf */ + + DEBUG(1, ("NSS Initialization complete\n")); + + return EOK; +} + +int main(int argc, const char *argv[]) +{ + int opt; + poptContext pc; + struct main_context *main_ctx; + int ret; + + struct poptOption long_options[] = { + POPT_AUTOHELP + SSSD_MAIN_OPTS + { NULL } + }; + + 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; + } + } + + poptFreeContext(pc); + + /* set up things like debug , signals, daemonization, etc... */ + ret = server_setup("sssd[nss]", 0, &main_ctx); + if (ret != EOK) return 2; + + ret = nss_process_init(main_ctx, + main_ctx->event_ctx, + main_ctx->confdb_ctx); + if (ret != EOK) return 3; + + /* loop on main */ + server_loop(main_ctx); + + return 0; +} + diff --git a/server/responder/nss/nsssrv.h b/server/responder/nss/nsssrv.h new file mode 100644 index 00000000..03dc35af --- /dev/null +++ b/server/responder/nss/nsssrv.h @@ -0,0 +1,118 @@ +/* + SSSD + + NSS Responder, header file + + Copyright (C) Simo Sorce <ssorce@redhat.com> 2008 + + 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 __NSSSRV_H__ +#define __NSSSRV_H__ + +#include <stdint.h> +#include <sys/un.h> +#include "talloc.h" +#include "tevent.h" +#include "ldb.h" +#include "../sss_client/sss_cli.h" +#include "dbus/dbus.h" +#include "sbus/sssd_dbus.h" +#include "responder/common/responder_cmd.h" + +#define NSS_SBUS_SERVICE_VERSION 0x0001 +#define NSS_SBUS_SERVICE_NAME "nss" + +#define NSS_PACKET_MAX_RECV_SIZE 1024 + +/* NSS_DOMAIN_DELIM can be specified in config.h */ +#include "config.h" +#ifndef NSS_DOMAIN_DELIM +#define NSS_DOMAIN_DELIM '@' +#endif + +#define NSS_ENUM_USERS 0x01 +#define NSS_ENUM_GROUPS 0x02 +#define NSS_ENUM_ALL 0x03 + +struct sysdb_ctx; +struct getent_ctx; + +struct nss_ctx { + struct event_context *ev; + struct fd_event *lfde; + int lfd; + struct sysdb_ctx *sysdb; + struct confdb_ctx *cdb; + char *sock_name; + struct service_sbus_ctx *ss_ctx; + struct service_sbus_ctx *dp_ctx; + struct btreemap *domain_map; + char *default_domain; + + int cache_timeout; + + struct sbus_method *sss_sbus_methods; + struct sss_cmd_table *sss_cmds; + const char *sss_pipe_name; + const char *confdb_socket_path; + struct sbus_method *dp_methods; +}; + +struct cli_ctx { + struct event_context *ev; + struct nss_ctx *nctx; + int cfd; + struct fd_event *cfde; + struct sockaddr_un addr; + struct cli_request *creq; + struct getent_ctx *gctx; +}; + +struct nss_domain_info { + char *basedn; + int enumerate; + bool has_provider; + bool legacy; +}; + +struct nss_packet; + +struct cli_request { + + /* original request from the wire */ + struct sss_packet *in; + + /* reply data */ + struct sss_packet *out; +}; + +int nss_cmd_execute(struct cli_ctx *cctx); + +/* from nsssrv_dp.c */ +#define NSS_DP_USER 1 +#define NSS_DP_GROUP 2 +#define NSS_DP_INITGROUPS 3 + +typedef void (*nss_dp_callback_t)(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr); + +int nss_dp_send_acct_req(struct nss_ctx *nctx, TALLOC_CTX *memctx, + nss_dp_callback_t callback, void *callback_ctx, + int timeout, const char *domain, int type, + const char *opt_name, uint32_t opt_id); +int nss_dp_init(struct nss_ctx *nctx); + +#endif /* __NSSSRV_H__ */ diff --git a/server/responder/nss/nsssrv_cmd.c b/server/responder/nss/nsssrv_cmd.c new file mode 100644 index 00000000..338de0ea --- /dev/null +++ b/server/responder/nss/nsssrv_cmd.c @@ -0,0 +1,2238 @@ +/* + SSSD + + NSS Responder + + Copyright (C) Simo Sorce <ssorce@redhat.com> 2008 + + 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 "util/util.h" +#include "util/btreemap.h" +#include "responder/common/responder_packet.h" +#include "responder/nss/nsssrv.h" +#include "db/sysdb.h" +#include <time.h> + +struct nss_cmd_ctx { + struct cli_ctx *cctx; + const char *name; + uid_t id; + + bool immediate; + bool done; + int nr; +}; + +struct getent_ctx { + struct ldb_result *pwds; + struct ldb_result *grps; + int pwd_cur; + int grp_cur; +}; + +struct nss_dom_ctx { + struct nss_cmd_ctx *cmdctx; + const char *domain; + bool check_provider; + bool legacy; +}; + +struct nss_cmd_table { + enum sss_cli_command cmd; + int (*fn)(struct cli_ctx *cctx); +}; + +static void nss_cmd_done(struct nss_cmd_ctx *cmdctx) +{ + /* now that the packet is in place, unlock queue + * making the event writable */ + EVENT_FD_WRITEABLE(cmdctx->cctx->cfde); + + /* free all request related data through the talloc hierarchy */ + talloc_free(cmdctx); +} + +static int nss_cmd_send_error(struct nss_cmd_ctx *cmdctx, int err) +{ + struct cli_ctx *cctx = cmdctx->cctx; + int ret; + + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + return ret; + } + + sss_packet_set_error(cctx->creq->out, err); + return EOK; +} + +#define NSS_CMD_FATAL_ERROR(cctx) do { \ + DEBUG(1,("Fatal error, killing connection!")); \ + talloc_free(cctx); \ + return; \ +} while(0) + +static int nss_parse_name(struct nss_dom_ctx *dctx, const char *fullname) +{ + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct nss_ctx *nctx = cmdctx->cctx->nctx; + struct nss_domain_info *info; + struct btreemap *domain_map; + char *delim; + char *domain; + + domain_map = nctx->domain_map; + + if ((delim = strchr(fullname, NSS_DOMAIN_DELIM)) != NULL) { + domain = delim+1; + } else { + domain = nctx->default_domain; + } + + /* Check for registered domain */ + info = btreemap_get_value(domain_map, (void *)domain); + if (!info) { + /* No such domain was registered. Return EINVAL. + * TODO: alternative approach? + * Alternatively, we could simply fail down to + * below, treating the entire construct as the + * full name if the domain is unspecified. + */ + return EINVAL; + } + + dctx->check_provider = info->has_provider; + dctx->legacy = info->legacy; + + dctx->domain = talloc_strdup(dctx, domain); + if (!dctx->domain) return ENOMEM; + + if (delim) { + cmdctx->name = talloc_strndup(cmdctx, fullname, delim-fullname); + } else { + cmdctx->name = talloc_strdup(cmdctx, fullname); + } + if (!cmdctx->name) return ENOMEM; + + return EOK; +} + +static int nss_cmd_get_version(struct cli_ctx *cctx) +{ + struct nss_cmd_ctx *cmdctx; + uint8_t *body; + size_t blen; + int ret; + + cmdctx = talloc(cctx, struct nss_cmd_ctx); + if (!cmdctx) { + return ENOMEM; + } + cmdctx->cctx = cctx; + + /* create response packet */ + ret = sss_packet_new(cctx->creq, sizeof(uint32_t), + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + return ret; + } + sss_packet_get_body(cctx->creq->out, &body, &blen); + ((uint32_t *)body)[0] = SSS_PROTOCOL_VERSION; + + nss_cmd_done(cmdctx); + return EOK; +} + +/**************************************************************************** + * PASSWD db related functions + ***************************************************************************/ + +static int fill_pwent(struct sss_packet *packet, + struct ldb_message **msgs, + int count) +{ + struct ldb_message *msg; + uint8_t *body; + const char *name; + const char *fullname; + const char *homedir; + const char *shell; + uint64_t uid; + uint64_t gid; + size_t rsize, rp, blen; + size_t s1, s2, s3, s4; + int i, ret, num; + + /* first 2 fields (len and reserved), filled up later */ + ret = sss_packet_grow(packet, 2*sizeof(uint32_t)); + rp = 2*sizeof(uint32_t); + + num = 0; + for (i = 0; i < count; i++) { + msg = msgs[i]; + + name = ldb_msg_find_attr_as_string(msg, SYSDB_PW_NAME, NULL); + fullname = ldb_msg_find_attr_as_string(msg, SYSDB_PW_FULLNAME, NULL); + homedir = ldb_msg_find_attr_as_string(msg, SYSDB_PW_HOMEDIR, NULL); + shell = ldb_msg_find_attr_as_string(msg, SYSDB_PW_SHELL, NULL); + uid = ldb_msg_find_attr_as_uint64(msg, SYSDB_PW_UIDNUM, 0); + gid = ldb_msg_find_attr_as_uint64(msg, SYSDB_PW_GIDNUM, 0); + + if (!name || !fullname || !homedir || !shell || !uid || !gid) { + DEBUG(1, ("Incomplete user object for %s[%llu]! Skipping\n", + name?name:"<NULL>", (unsigned long long int)uid)); + continue; + } + + s1 = strlen(name) + 1; + s2 = strlen(fullname) + 1; + s3 = strlen(homedir) + 1; + s4 = strlen(shell) + 1; + rsize = 2*sizeof(uint64_t) +s1 + 2 + s2 + s3 +s4; + + ret = sss_packet_grow(packet, rsize); + if (ret != EOK) { + num = 0; + goto done; + } + sss_packet_get_body(packet, &body, &blen); + + ((uint64_t *)(&body[rp]))[0] = uid; + ((uint64_t *)(&body[rp]))[1] = gid; + rp += 2*sizeof(uint64_t); + memcpy(&body[rp], name, s1); + rp += s1; + memcpy(&body[rp], "x", 2); + rp += 2; + memcpy(&body[rp], fullname, s2); + rp += s2; + memcpy(&body[rp], homedir, s3); + rp += s3; + memcpy(&body[rp], shell, s4); + rp += s4; + + num++; + } + +done: + sss_packet_get_body(packet, &body, &blen); + ((uint32_t *)body)[0] = num; /* num results */ + ((uint32_t *)body)[1] = 0; /* reserved */ + + return EOK; +} + +static void nss_cmd_getpwnam_dp_callback(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr); + +static void nss_cmd_getpwnam_callback(void *ptr, int status, + struct ldb_result *res) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int timeout; + uint64_t lastUpdate; + uint8_t *body; + size_t blen; + bool call_provider = false; + int ret; + + if (status != LDB_SUCCESS) { + ret = nss_cmd_send_error(cmdctx, status); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + goto done; + } + + if (dctx->check_provider) { + switch (res->count) { + case 0: + call_provider = true; + break; + + case 1: + timeout = cmdctx->cctx->nctx->cache_timeout; + + lastUpdate = ldb_msg_find_attr_as_uint64(res->msgs[0], + SYSDB_LAST_UPDATE, 0); + if (lastUpdate + timeout < time(NULL)) { + call_provider = true; + } + break; + + default: + DEBUG(1, ("getpwnam call returned more than one result !?!\n")); + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + goto done; + } + } + + if (call_provider) { + + /* dont loop forever :-) */ + dctx->check_provider = false; + timeout = SSS_CLI_SOCKET_TIMEOUT/2; + + ret = nss_dp_send_acct_req(cctx->nctx, cmdctx, + nss_cmd_getpwnam_dp_callback, dctx, + timeout, dctx->domain, NSS_DP_USER, + cmdctx->name, 0); + if (ret != EOK) { + DEBUG(3, ("Failed to dispatch request: %d(%s)\n", + ret, strerror(ret))); + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + goto done; + } + return; + } + + switch (res->count) { + case 0: + + DEBUG(2, ("No results for getpwnam call\n")); + + ret = sss_packet_new(cctx->creq, 2*sizeof(uint32_t), + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + sss_packet_get_body(cctx->creq->out, &body, &blen); + ((uint32_t *)body)[0] = 0; /* 0 results */ + ((uint32_t *)body)[1] = 0; /* reserved */ + break; + + case 1: + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + ret = fill_pwent(cctx->creq->out, res->msgs, res->count); + sss_packet_set_error(cctx->creq->out, ret); + + break; + + default: + DEBUG(1, ("getpwnam call returned more than one result !?!\n")); + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + } + +done: + nss_cmd_done(cmdctx); +} + +static void nss_cmd_getpwnam_dp_callback(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int ret; + + if (err_maj) { + DEBUG(2, ("Unable to get information from Data Provider\n" + "Error: %u, %u, %s\n" + "Will try to return what we have in cache\n", + (unsigned int)err_maj, (unsigned int)err_min, err_msg)); + } + + ret = sysdb_getpwnam(cmdctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, cmdctx->name, + dctx->legacy, + nss_cmd_getpwnam_callback, dctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + nss_cmd_done(cmdctx); + } +} + +static int nss_cmd_getpwnam(struct cli_ctx *cctx) +{ + struct nss_cmd_ctx *cmdctx; + struct nss_dom_ctx *dctx; + uint8_t *body; + size_t blen; + int ret; + + cmdctx = talloc_zero(cctx, struct nss_cmd_ctx); + if (!cmdctx) { + return ENOMEM; + } + cmdctx->cctx = cctx; + + dctx = talloc_zero(cmdctx, struct nss_dom_ctx); + if (!dctx) return ENOMEM; + dctx->cmdctx = cmdctx; + + /* get user name to query */ + sss_packet_get_body(cctx->creq->in, &body, &blen); + /* if not terminated fail */ + if (body[blen -1] != '\0') { + talloc_free(cmdctx); + return EINVAL; + } + + ret = nss_parse_name(dctx, (const char *)body); + if (ret != EOK) { + DEBUG(1, ("Invalid name received\n")); + talloc_free(cmdctx); + return ret; + } + DEBUG(4, ("Requesting info for [%s] from [%s]\n", + cmdctx->name, dctx->domain)); + + ret = sysdb_getpwnam(cmdctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, cmdctx->name, + dctx->legacy, + nss_cmd_getpwnam_callback, dctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret == EOK) { + nss_cmd_done(cmdctx); + } + return ret; + } + + return EOK; +} + +static void nss_cmd_getpwuid_dp_callback(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr); + +static void nss_cmd_getpwuid_callback(void *ptr, int status, + struct ldb_result *res) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int timeout; + uint64_t lastUpdate; + uint8_t *body; + size_t blen; + bool call_provider = false; + int ret; + + /* one less to go */ + cmdctx->nr--; + + /* check if another callback already replied */ + if (cmdctx->done) { + /* now check if this is the last callback */ + if (cmdctx->nr == 0) { + /* ok we are really done with this request */ + goto done; + } + } + + if (status != LDB_SUCCESS) { + ret = nss_cmd_send_error(cmdctx, status); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + goto done; + } + + if (dctx->check_provider) { + switch (res->count) { + case 0: + call_provider = true; + break; + + case 1: + timeout = cmdctx->cctx->nctx->cache_timeout; + + lastUpdate = ldb_msg_find_attr_as_uint64(res->msgs[0], + SYSDB_LAST_UPDATE, 0); + if (lastUpdate + timeout < time(NULL)) { + call_provider = true; + } + break; + + default: + DEBUG(1, ("getpwuid call returned more than one result !?!\n")); + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + goto done; + } + } + + if (call_provider) { + + /* yet one more call to go */ + cmdctx->nr++; + + /* dont loop forever :-) */ + dctx->check_provider = false; + timeout = SSS_CLI_SOCKET_TIMEOUT/2; + + ret = nss_dp_send_acct_req(cctx->nctx, cmdctx, + nss_cmd_getpwuid_dp_callback, dctx, + timeout, dctx->domain, NSS_DP_USER, + NULL, cmdctx->id); + if (ret != EOK) { + DEBUG(3, ("Failed to dispatch request: %d(%s)\n", + ret, strerror(ret))); + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + goto done; + } + return; + } + + switch (res->count) { + case 0: + if (cmdctx->nr != 0) { + /* nothing to do */ + return; + } + + DEBUG(2, ("No results for getpwuid call\n")); + + ret = sss_packet_new(cctx->creq, 2*sizeof(uint32_t), + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + sss_packet_get_body(cctx->creq->out, &body, &blen); + ((uint32_t *)body)[0] = 0; /* 0 results */ + ((uint32_t *)body)[1] = 0; /* reserved */ + break; + + case 1: + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + + ret = fill_pwent(cctx->creq->out, res->msgs, res->count); + sss_packet_set_error(cctx->creq->out, ret); + + break; + + default: + DEBUG(1, ("getpwnam call returned more than one result !?!\n")); + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + } + +done: + if (cmdctx->nr != 0) { + cmdctx->done = true; /* signal that we are done */ + return; + } + nss_cmd_done(cmdctx); +} + +static void nss_cmd_getpwuid_dp_callback(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int ret; + + if (err_maj) { + DEBUG(2, ("Unable to get information from Data Provider\n" + "Error: %u, %u, %s\n" + "Will try to return what we have in cache\n", + (unsigned int)err_maj, (unsigned int)err_min, err_msg)); + } + + ret = sysdb_getpwuid(cmdctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, cmdctx->id, + dctx->legacy, + nss_cmd_getpwuid_callback, dctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + if (cmdctx->nr != 0) { + cmdctx->done = true; /* signal that we are done */ + return; + } + nss_cmd_done(cmdctx); + } +} + +static int nss_cmd_getpwuid(struct cli_ctx *cctx) +{ + struct nss_cmd_ctx *cmdctx; + struct nss_dom_ctx *dctx; + struct nss_domain_info *info; + const char **domains; + uint8_t *body; + size_t blen; + int i, num, ret; + + cmdctx = talloc_zero(cctx, struct nss_cmd_ctx); + if (!cmdctx) { + return ENOMEM; + } + cmdctx->cctx = cctx; + + /* get uid to query */ + sss_packet_get_body(cctx->creq->in, &body, &blen); + + if (blen != sizeof(uint64_t)) { + return EINVAL; + } + + cmdctx->id = (uid_t)*((uint64_t *)body); + + /* FIXME: Just ask all backends for now, until we check for ranges */ + dctx = NULL; + domains = NULL; + num = 0; + /* get domains list */ + btreemap_get_keys(cmdctx, cctx->nctx->domain_map, + (const void ***)&domains, &num); + + cmdctx->nr = num; + + for (i = 0; i < num; i++) { + info = btreemap_get_value(cctx->nctx->domain_map, domains[i]); + + dctx = talloc_zero(cmdctx, struct nss_dom_ctx); + if (!dctx) return ENOMEM; + + dctx->cmdctx = cmdctx; + dctx->domain = talloc_strdup(dctx, domains[i]); + if (!dctx->domain) return ENOMEM; + dctx->check_provider = info->has_provider; + dctx->legacy = info->legacy; + + + DEBUG(4, ("Requesting info for [%lu@%s]\n", + cmdctx->id, dctx->domain)); + + ret = sysdb_getpwuid(cmdctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, cmdctx->id, + dctx->legacy, + nss_cmd_getpwuid_callback, dctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + /* shutdown ? */ + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret == EOK) { + nss_cmd_done(cmdctx); + } + return ret; + } + } + + return EOK; +} + +/* to keep it simple at this stage we are retrieving the + * full enumeration again for each request for each process + * and we also block on setpwent() for the full time needed + * to retrieve the data. And endpwent() frees all the data. + * Next steps are: + * - use an nsssrv wide cache with data already structured + * so that it can be immediately returned (see nscd way) + * - use mutexes so that setpwent() can return immediately + * even if the data is still being fetched + * - make getpwent() wait on the mutex + */ +static void nss_cmd_getpwent_callback(void *ptr, int status, + struct ldb_result *res); + +static void nss_cmd_setpwent_callback(void *ptr, int status, + struct ldb_result *res) +{ + struct nss_cmd_ctx *cmdctx = talloc_get_type(ptr, struct nss_cmd_ctx); + struct cli_ctx *cctx = cmdctx->cctx; + struct getent_ctx *gctx = cctx->gctx; + struct ldb_result *store = gctx->pwds; + int i, j, c, ret; + + cmdctx->nr--; + + if (cmdctx->done) { + /* do not reply until all domain searches are done */ + if (cmdctx->nr != 0) return; + else goto done; + } + + if (status != LDB_SUCCESS) { + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + sss_packet_set_error(cctx->creq->out, status); + cmdctx->done = true; + return; + } + + if (store) { + c = store->count + res->count; + store->msgs = talloc_realloc(store, store->msgs, + struct ldb_message *, c); + if (!store->msgs) NSS_CMD_FATAL_ERROR(cctx); + + for (i = store->count, j = 0; i < c; i++, j++) { + store->msgs[i] = talloc_steal(store->msgs, res->msgs[j]); + if (!store->msgs[i]) NSS_CMD_FATAL_ERROR(cctx); + } + store->count = c; + talloc_free(res); + } else { + gctx->pwds = talloc_steal(gctx, res); + } + + /* do not reply until all domain searches are done */ + if (cmdctx->nr) return; + + if (cmdctx->immediate) { + /* this was a getpwent call w/o setpwent, + * return immediately one result */ + nss_cmd_getpwent_callback(ptr, status, res); + + return; + } + + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + +done: + nss_cmd_done(cmdctx); +} + +static void nss_cmd_setpw_dp_callback(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int ret; + + if (err_maj) { + DEBUG(2, ("Unable to get information from Data Provider\n" + "Error: %u, %u, %s\n" + "Will try to return what we have in cache\n", + (unsigned int)err_maj, (unsigned int)err_min, err_msg)); + } + + ret = sysdb_enumpwent(cmdctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, dctx->legacy, + nss_cmd_setpwent_callback, cmdctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + nss_cmd_done(cmdctx); + } +} + +static int nss_cmd_setpwent_ext(struct cli_ctx *cctx, bool immediate) +{ + struct nss_domain_info *info; + struct nss_cmd_ctx *cmdctx; + struct nss_dom_ctx *dctx; + struct getent_ctx *gctx; + const char **domains; + int timeout; + int i, ret, num; + + DEBUG(4, ("Requesting info for all users\n")); + + cmdctx = talloc_zero(cctx, struct nss_cmd_ctx); + if (!cmdctx) { + return ENOMEM; + } + cmdctx->cctx = cctx; + + if (cctx->gctx == NULL) { + gctx = talloc_zero(cctx, struct getent_ctx); + if (!gctx) { + talloc_free(cmdctx); + return ENOMEM; + } + cctx->gctx = gctx; + } + if (cctx->gctx->pwds) { + talloc_free(cctx->gctx->pwds); + cctx->gctx->pwds = NULL; + cctx->gctx->pwd_cur = 0; + } + + cmdctx->immediate = immediate; + + domains = NULL; + num = 0; + /* get domains list */ + btreemap_get_keys(cmdctx, cctx->nctx->domain_map, + (const void ***)&domains, &num); + + /* check if enumeration is enabled in any domain */ + for (i = 0; i < num; i++) { + info = btreemap_get_value(cctx->nctx->domain_map, domains[i]); + + if ((info->enumerate & NSS_ENUM_USERS) == 0) { + continue; + } + + /* TODO: enabled, check if we have a recent cached enumeration */ + + /* ok no cache, go and ask the backend to enumerate */ + dctx = talloc_zero(cmdctx, struct nss_dom_ctx); + if (!dctx) return ENOMEM; + + dctx->cmdctx = cmdctx; + dctx->domain = talloc_strdup(dctx, domains[i]); + if (!dctx->domain) return ENOMEM; + dctx->check_provider = info->has_provider; + dctx->legacy = info->legacy; + + if (dctx->check_provider) { + timeout = SSS_CLI_SOCKET_TIMEOUT/(i+2); + ret = nss_dp_send_acct_req(cctx->nctx, cmdctx, + nss_cmd_setpw_dp_callback, dctx, + timeout, domains[i], NSS_DP_USER, + NULL, 0); + } else { + ret = sysdb_enumpwent(dctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, dctx->legacy, + nss_cmd_setpwent_callback, cmdctx); + } + if (ret != EOK) { + /* FIXME: shutdown ? */ + DEBUG(1, ("Failed to send enumeration request for domain [%s]!\n", + domains[i])); + continue; + } + + /* number of replies to wait for before setpwent is done */ + cmdctx->nr++; + } + + if (cmdctx->nr == 0) { + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + return ret; + } + + sss_packet_set_error(cctx->creq->out, ret); + nss_cmd_done(cmdctx); + return EOK; + } + + return ret; +} + +static int nss_cmd_setpwent(struct cli_ctx *cctx) +{ + return nss_cmd_setpwent_ext(cctx, false); +} + + +static int nss_cmd_retpwent(struct cli_ctx *cctx, int num) +{ + struct getent_ctx *gctx = cctx->gctx; + int n, ret; + + n = gctx->pwds->count - gctx->pwd_cur; + if (n > num) n = num; + + ret = fill_pwent(cctx->creq->out, + &(gctx->pwds->msgs[gctx->pwd_cur]), n); + gctx->pwd_cur += n; + + return ret; +} + +/* used only if a process calls getpwent() without first calling setpwent() + */ +static void nss_cmd_getpwent_callback(void *ptr, int status, + struct ldb_result *res) +{ + struct nss_cmd_ctx *cmdctx = talloc_get_type(ptr, struct nss_cmd_ctx); + struct cli_ctx *cctx = cmdctx->cctx; + struct getent_ctx *gctx = cctx->gctx; + uint8_t *body; + size_t blen; + uint32_t num; + int ret; + + /* get max num of entries to return in one call */ + sss_packet_get_body(cctx->creq->in, &body, &blen); + if (blen != sizeof(uint32_t)) { + NSS_CMD_FATAL_ERROR(cctx); + } + num = *((uint32_t *)body); + + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + + if (status != LDB_SUCCESS) { + sss_packet_set_error(cctx->creq->out, status); + goto done; + } + + gctx->pwds = talloc_steal(gctx, res); + + ret = nss_cmd_retpwent(cctx, num); + sss_packet_set_error(cctx->creq->out, ret); + +done: + nss_cmd_done(cmdctx); +} + +static int nss_cmd_getpwent(struct cli_ctx *cctx) +{ + struct nss_cmd_ctx *cmdctx; + struct getent_ctx *gctx; + uint8_t *body; + size_t blen; + uint32_t num; + int ret; + + DEBUG(4, ("Requesting info for all accounts\n")); + + /* get max num of entries to return in one call */ + sss_packet_get_body(cctx->creq->in, &body, &blen); + if (blen != sizeof(uint32_t)) { + return EINVAL; + } + num = *((uint32_t *)body); + + /* see if we need to trigger an implicit setpwent() */ + if (cctx->gctx == NULL || cctx->gctx->pwds == NULL) { + if (cctx->gctx == NULL) { + gctx = talloc_zero(cctx, struct getent_ctx); + if (!gctx) { + return ENOMEM; + } + cctx->gctx = gctx; + } + if (cctx->gctx->pwds == NULL) { + ret = nss_cmd_setpwent_ext(cctx, true); + return ret; + } + } + + cmdctx = talloc(cctx, struct nss_cmd_ctx); + if (!cmdctx) { + return ENOMEM; + } + cmdctx->cctx = cctx; + + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + return ret; + } + + ret = nss_cmd_retpwent(cctx, num); + sss_packet_set_error(cctx->creq->out, ret); + nss_cmd_done(cmdctx); + return EOK; +} + +static int nss_cmd_endpwent(struct cli_ctx *cctx) +{ + struct nss_cmd_ctx *cmdctx; + int ret; + + DEBUG(4, ("Terminating request info for all accounts\n")); + + cmdctx = talloc(cctx, struct nss_cmd_ctx); + if (!cmdctx) { + return ENOMEM; + } + cmdctx->cctx = cctx; + + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + + if (cctx->gctx == NULL) goto done; + if (cctx->gctx->pwds == NULL) goto done; + + /* free results and reset */ + talloc_free(cctx->gctx->pwds); + cctx->gctx->pwds = NULL; + cctx->gctx->pwd_cur = 0; + +done: + nss_cmd_done(cmdctx); + return EOK; +} + +/**************************************************************************** + * GROUP db related functions + ***************************************************************************/ + +static int fill_grent(struct sss_packet *packet, + struct ldb_message **msgs, + int count) +{ + struct ldb_message_element *el; + struct ldb_message *msg; + uint8_t *body; + const char *name; + uint64_t gid; + size_t rsize, rp, blen, mnump; + int i, j, ret, num, memnum; + bool get_group = true; + bool memnum_set = false; + + /* first 2 fields (len and reserved), filled up later */ + ret = sss_packet_grow(packet, 2*sizeof(uint32_t)); + rp = 2*sizeof(uint32_t); + + num = 0; + mnump = 0; + for (i = 0; i < count; i++) { + msg = msgs[i]; + + if (get_group) { + /* find group name/gid */ + name = ldb_msg_find_attr_as_string(msg, SYSDB_GR_NAME, NULL); + gid = ldb_msg_find_attr_as_uint64(msg, SYSDB_GR_GIDNUM, 0); + if (!name || !gid) { + DEBUG(1, ("Incomplete group object for %s[%llu]! Aborting\n", + name?name:"<NULL>", (unsigned long long int)gid)); + num = 0; + goto done; + } + + /* fill in gid and name and set pointer for number of members */ + rsize = sizeof(uint64_t) + sizeof(uint32_t) + strlen(name)+1 +2; + ret = sss_packet_grow(packet, rsize); + sss_packet_get_body(packet, &body, &blen); + rp = blen - rsize; + ((uint64_t *)(&body[rp]))[0] = gid; + rp += sizeof(uint64_t); + ((uint32_t *)(&body[rp]))[0] = 0; /* init members num to 0 */ + mnump = rp; /* keep around members num pointer to set later */ + rp += sizeof(uint32_t); + memcpy(&body[rp], name, strlen(name)+1); + body[blen-2] = 'x'; /* group passwd field */ + body[blen-1] = '\0'; + + memnum_set = false; + memnum = 0; + num++; + + /* legacy style group, members are in SYSDB_LEGACY_MEMBER */ + el = ldb_msg_find_element(msg, SYSDB_LEGACY_MEMBER); + if (el) { + /* legacy */ + memnum = el->num_values; + + for (j = 0; j < memnum; j++) { + rsize = el->values[j].length + 1; + ret = sss_packet_grow(packet, rsize); + if (ret != EOK) { + num = 0; + goto done; + } + + sss_packet_get_body(packet, &body, &blen); + rp = blen - rsize; + memcpy(&body[rp], el->values[j].data, el->values[j].length); + body[blen-1] = '\0'; + } + + sss_packet_get_body(packet, &body, &blen); + ((uint32_t *)(&body[mnump]))[0] = memnum; /* num members */ + memnum_set = true; + + } else { + get_group = false; + } + + continue; + } + + name = ldb_msg_find_attr_as_string(msg, SYSDB_PW_NAME, NULL); + + if (!name) { + /* last member of previous group found, or error. + * set next element to be a group, and eventually + * fail there if here start bogus entries */ + get_group = true; + i--; + sss_packet_get_body(packet, &body, &blen); + ((uint32_t *)(&body[mnump]))[0] = memnum; /* num members */ + memnum_set = true; + continue; + } + + rsize = strlen(name) + 1; + + ret = sss_packet_grow(packet, rsize); + if (ret != EOK) { + num = 0; + goto done; + } + sss_packet_get_body(packet, &body, &blen); + rp = blen - rsize; + memcpy(&body[rp], name, rsize); + + memnum++; + } + + if (!memnum_set) { + /* fill in the last group member count */ + if (mnump != 0) { + sss_packet_get_body(packet, &body, &blen); + ((uint32_t *)(&body[mnump]))[0] = memnum; /* num members */ + } + } + +done: + sss_packet_get_body(packet, &body, &blen); + ((uint32_t *)body)[0] = num; /* num results */ + ((uint32_t *)body)[1] = 0; /* reserved */ + + return EOK; +} + +static void nss_cmd_getgrnam_dp_callback(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr); + +static void nss_cmd_getgrnam_callback(void *ptr, int status, + struct ldb_result *res) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int timeout; + uint64_t lastUpdate; + uint8_t *body; + size_t blen; + bool call_provider = false; + int ret; + + if (status != LDB_SUCCESS) { + ret = nss_cmd_send_error(cmdctx, status); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + nss_cmd_done(cmdctx); + return; + } + + if (dctx->check_provider) { + switch (res->count) { + case 0: + call_provider = true; + break; + + default: + timeout = cmdctx->cctx->nctx->cache_timeout; + + lastUpdate = ldb_msg_find_attr_as_uint64(res->msgs[0], + SYSDB_LAST_UPDATE, 0); + if (lastUpdate + timeout < time(NULL)) { + call_provider = true; + } + } + } + + if (call_provider) { + + /* dont loop forever :-) */ + dctx->check_provider = false; + timeout = SSS_CLI_SOCKET_TIMEOUT/2; + + ret = nss_dp_send_acct_req(cctx->nctx, cmdctx, + nss_cmd_getgrnam_dp_callback, dctx, + timeout, dctx->domain, NSS_DP_GROUP, + cmdctx->name, 0); + if (ret != EOK) { + DEBUG(3, ("Failed to dispatch request: %d(%s)\n", + ret, strerror(ret))); + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + goto done; + } + + return; + } + + switch (res->count) { + case 0: + + DEBUG(2, ("No results for getgrnam call\n")); + + ret = sss_packet_new(cctx->creq, 2*sizeof(uint32_t), + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + sss_packet_get_body(cctx->creq->out, &body, &blen); + ((uint32_t *)body)[0] = 0; /* 0 results */ + ((uint32_t *)body)[1] = 0; /* reserved */ + break; + + default: + + DEBUG(6, ("Returning info for group [%s]\n", cmdctx->name)); + + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + + ret = fill_grent(cctx->creq->out, res->msgs, res->count); + sss_packet_set_error(cctx->creq->out, ret); + } + +done: + nss_cmd_done(cmdctx); +} + +static void nss_cmd_getgrnam_dp_callback(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int ret; + + if (err_maj) { + DEBUG(2, ("Unable to get information from Data Provider\n" + "Error: %u, %u, %s\n" + "Will try to return what we have in cache\n", + (unsigned int)err_maj, (unsigned int)err_min, err_msg)); + } + + ret = sysdb_getgrnam(cmdctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, cmdctx->name, + dctx->legacy, + nss_cmd_getgrnam_callback, dctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + nss_cmd_done(cmdctx); + } +} + +static int nss_cmd_getgrnam(struct cli_ctx *cctx) +{ + struct nss_cmd_ctx *cmdctx; + struct nss_dom_ctx *dctx; + uint8_t *body; + size_t blen; + int ret; + + cmdctx = talloc_zero(cctx, struct nss_cmd_ctx); + if (!cmdctx) { + return ENOMEM; + } + cmdctx->cctx = cctx; + + dctx = talloc_zero(cmdctx, struct nss_dom_ctx); + if (!dctx) return ENOMEM; + dctx->cmdctx = cmdctx; + + /* get user name to query */ + sss_packet_get_body(cctx->creq->in, &body, &blen); + /* if not terminated fail */ + if (body[blen -1] != '\0') { + talloc_free(cmdctx); + return EINVAL; + } + + ret = nss_parse_name(dctx, (const char *)body); + if (ret != EOK) { + DEBUG(1, ("Invalid name received\n")); + talloc_free(cmdctx); + return ret; + } + DEBUG(4, ("Requesting info for [%s] from [%s]\n", + cmdctx->name, dctx->domain)); + + ret = sysdb_getgrnam(cmdctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, cmdctx->name, + dctx->legacy, + nss_cmd_getgrnam_callback, dctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret == EOK) { + nss_cmd_done(cmdctx); + } + return ret; + } + + return EOK; +} + +static void nss_cmd_getgrgid_dp_callback(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr); + +static void nss_cmd_getgrgid_callback(void *ptr, int status, + struct ldb_result *res) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int timeout; + uint64_t lastUpdate; + uint8_t *body; + size_t blen; + bool call_provider = false; + int ret; + + /* one less to go */ + cmdctx->nr--; + + /* check if another callback already replied */ + if (cmdctx->done) { + /* now check if this is the last callback */ + if (cmdctx->nr == 0) { + /* ok we are really done with this request */ + goto done; + } + } + + if (status != LDB_SUCCESS) { + ret = nss_cmd_send_error(cmdctx, status); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + goto done; + } + + if (dctx->check_provider) { + switch (res->count) { + case 0: + call_provider = true; + break; + + default: + timeout = cmdctx->cctx->nctx->cache_timeout; + + lastUpdate = ldb_msg_find_attr_as_uint64(res->msgs[0], + SYSDB_LAST_UPDATE, 0); + if (lastUpdate + timeout < time(NULL)) { + call_provider = true; + } + } + } + + if (call_provider) { + + /* yet one more call to go */ + cmdctx->nr++; + + /* dont loop forever :-) */ + dctx->check_provider = false; + timeout = SSS_CLI_SOCKET_TIMEOUT/2; + + ret = nss_dp_send_acct_req(cctx->nctx, cmdctx, + nss_cmd_getgrgid_dp_callback, dctx, + timeout, dctx->domain, NSS_DP_GROUP, + NULL, cmdctx->id); + if (ret != EOK) { + DEBUG(3, ("Failed to dispatch request: %d(%s)\n", + ret, strerror(ret))); + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + goto done; + } + return; + } + + switch (res->count) { + case 0: + if (cmdctx->nr != 0) { + /* nothing to do */ + return; + } + + DEBUG(2, ("No results for getgrgid call\n")); + + ret = sss_packet_new(cctx->creq, 2*sizeof(uint32_t), + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + sss_packet_get_body(cctx->creq->out, &body, &blen); + ((uint32_t *)body)[0] = 0; /* 0 results */ + ((uint32_t *)body)[1] = 0; /* reserved */ + break; + + default: + + DEBUG(6, ("Returning info for group [%u]\n", (unsigned)cmdctx->id)); + + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + + ret = fill_grent(cctx->creq->out, res->msgs, res->count); + sss_packet_set_error(cctx->creq->out, ret); + } + +done: + if (cmdctx->nr != 0) { + cmdctx->done = true; /* signal that we are done */ + return; + } + nss_cmd_done(cmdctx); +} + +static void nss_cmd_getgrgid_dp_callback(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int ret; + + if (err_maj) { + DEBUG(2, ("Unable to get information from Data Provider\n" + "Error: %u, %u, %s\n" + "Will try to return what we have in cache\n", + (unsigned int)err_maj, (unsigned int)err_min, err_msg)); + } + + ret = sysdb_getgrgid(cmdctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, cmdctx->id, + dctx->legacy, + nss_cmd_getgrgid_callback, dctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + nss_cmd_done(cmdctx); + } +} + +static int nss_cmd_getgrgid(struct cli_ctx *cctx) +{ + struct nss_cmd_ctx *cmdctx; + struct nss_dom_ctx *dctx; + struct nss_domain_info *info; + const char **domains; + uint8_t *body; + size_t blen; + int i, num, ret; + + cmdctx = talloc_zero(cctx, struct nss_cmd_ctx); + if (!cmdctx) { + return ENOMEM; + } + cmdctx->cctx = cctx; + + /* get uid to query */ + sss_packet_get_body(cctx->creq->in, &body, &blen); + + if (blen != sizeof(uint64_t)) { + return EINVAL; + } + + cmdctx->id = (gid_t)*((uint64_t *)body); + + /* FIXME: Just ask all backends for now, until we check for ranges */ + dctx = NULL; + domains = NULL; + num = 0; + /* get domains list */ + btreemap_get_keys(cmdctx, cctx->nctx->domain_map, + (const void ***)&domains, &num); + + cmdctx->nr = num; + + for (i = 0; i < num; i++) { + info = btreemap_get_value(cctx->nctx->domain_map, domains[i]); + + dctx = talloc_zero(cmdctx, struct nss_dom_ctx); + if (!dctx) return ENOMEM; + + dctx->cmdctx = cmdctx; + dctx->domain = talloc_strdup(dctx, domains[i]); + if (!dctx->domain) return ENOMEM; + dctx->check_provider = info->has_provider; + dctx->legacy = info->legacy; + + DEBUG(4, ("Requesting info for [%lu@%s]\n", + cmdctx->id, dctx->domain)); + + ret = sysdb_getgrgid(cmdctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, cmdctx->id, + dctx->legacy, + nss_cmd_getgrgid_callback, dctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + /* shutdown ? */ + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret == EOK) { + nss_cmd_done(cmdctx); + } + return ret; + } + } + + return EOK; +} + +/* to keep it simple at this stage we are retrieving the + * full enumeration again for each request for each process + * and we also block on setgrent() for the full time needed + * to retrieve the data. And endgrent() frees all the data. + * Next steps are: + * - use and nsssrv wide cache with data already structured + * so that it can be immediately returned (see nscd way) + * - use mutexes so that setgrent() can return immediately + * even if the data is still being fetched + * - make getgrent() wait on the mutex + */ +static void nss_cmd_getgrent_callback(void *ptr, int status, + struct ldb_result *res); + +static void nss_cmd_setgrent_callback(void *ptr, int status, + struct ldb_result *res) +{ + struct nss_cmd_ctx *cmdctx = talloc_get_type(ptr, struct nss_cmd_ctx); + struct cli_ctx *cctx = cmdctx->cctx; + struct getent_ctx *gctx = cctx->gctx; + struct ldb_result *store = gctx->grps; + int i, j, c, ret; + + cmdctx->nr--; + + if (cmdctx->done) { + /* do not reply until all domain searches are done */ + if (cmdctx->nr != 0) return; + else goto done; + } + + if (status != LDB_SUCCESS) { + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + sss_packet_set_error(cctx->creq->out, status); + cmdctx->done = true; + return; + } + + if (store) { + c = store->count + res->count; + store->msgs = talloc_realloc(store, store->msgs, + struct ldb_message *, c); + if (!store->msgs) NSS_CMD_FATAL_ERROR(cctx); + + for (i = store->count, j = 0; i < c; i++, j++) { + store->msgs[i] = talloc_steal(store->msgs, res->msgs[j]); + if (!store->msgs[i]) NSS_CMD_FATAL_ERROR(cctx); + } + store->count = c; + talloc_free(res); + } else { + gctx->grps = talloc_steal(gctx, res); + } + + /* do not reply until all domain searches are done */ + if (cmdctx->nr) return; + + if (cmdctx->immediate) { + /* this was a getgrent call w/o setgrent, + * return immediately one result */ + nss_cmd_getgrent_callback(ptr, status, res); + return; + } + + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + +done: + nss_cmd_done(cmdctx); +} + +static void nss_cmd_setgr_dp_callback(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int ret; + + if (err_maj) { + DEBUG(2, ("Unable to get information from Data Provider\n" + "Error: %u, %u, %s\n" + "Will try to return what we have in cache\n", + (unsigned int)err_maj, (unsigned int)err_min, err_msg)); + } + + ret = sysdb_enumgrent(dctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, dctx->legacy, + nss_cmd_setgrent_callback, cmdctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + nss_cmd_done(cmdctx); + } +} + +static int nss_cmd_setgrent_ext(struct cli_ctx *cctx, bool immediate) +{ + struct nss_domain_info *info; + struct nss_cmd_ctx *cmdctx; + struct nss_dom_ctx *dctx; + struct getent_ctx *gctx; + const char **domains; + int timeout; + int i, ret, num; + + DEBUG(4, ("Requesting info for all groups\n")); + + cmdctx = talloc_zero(cctx, struct nss_cmd_ctx); + if (!cmdctx) { + return ENOMEM; + } + cmdctx->cctx = cctx; + + if (cctx->gctx == NULL) { + gctx = talloc_zero(cctx, struct getent_ctx); + if (!gctx) { + talloc_free(cmdctx); + return ENOMEM; + } + cctx->gctx = gctx; + } + if (cctx->gctx->grps) { + talloc_free(cctx->gctx->grps); + cctx->gctx->grps = NULL; + cctx->gctx->grp_cur = 0; + } + + cmdctx->immediate = immediate; + + domains = NULL; + num = 0; + /* get domains list */ + btreemap_get_keys(cmdctx, cctx->nctx->domain_map, + (const void ***)&domains, &num); + + /* check if enumeration is enabled in any domain */ + for (i = 0; i < num; i++) { + info = btreemap_get_value(cctx->nctx->domain_map, domains[i]); + + if ((info->enumerate & NSS_ENUM_GROUPS) == 0) { + continue; + } + + /* TODO: enabled, check if we have a recent cached enumeration */ + + /* ok no cache, go and ask the backend to enumerate */ + dctx = talloc_zero(cmdctx, struct nss_dom_ctx); + if (!dctx) return ENOMEM; + + dctx->cmdctx = cmdctx; + dctx->domain = talloc_strdup(dctx, domains[i]); + if (!dctx->domain) return ENOMEM; + dctx->check_provider = info->has_provider; + dctx->legacy = info->legacy; + + if (dctx->check_provider) { + timeout = SSS_CLI_SOCKET_TIMEOUT/(i+2); + ret = nss_dp_send_acct_req(cctx->nctx, cmdctx, + nss_cmd_setgr_dp_callback, dctx, + timeout, domains[i], NSS_DP_GROUP, + NULL, 0); + } else { + ret = sysdb_enumgrent(dctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, dctx->legacy, + nss_cmd_setgrent_callback, cmdctx); + } + if (ret != EOK) { + /* FIXME: shutdown ? */ + DEBUG(1, ("Failed to send enumeration request for domain [%s]!\n", + domains[i])); + continue; + } + + cmdctx->nr++; + } + + if (cmdctx->nr == 0) { + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + return ret; + } + + sss_packet_set_error(cctx->creq->out, ret); + nss_cmd_done(cmdctx); + return EOK; + } + + return ret; +} + +static int nss_cmd_setgrent(struct cli_ctx *cctx) +{ + return nss_cmd_setgrent_ext(cctx, false); +} + +static int nss_cmd_retgrent(struct cli_ctx *cctx, int num) +{ + struct getent_ctx *gctx = cctx->gctx; + int n, ret; + + n = gctx->grps->count - gctx->grp_cur; + if (n > num) n = num; + + ret = fill_grent(cctx->creq->out, + &(gctx->grps->msgs[gctx->grp_cur]), n); + gctx->grp_cur += n; + + return ret; +} + +/* used only if a process calls getpwent() without first calling setpwent() + * in this case we basically trigger an implicit setpwent() */ +static void nss_cmd_getgrent_callback(void *ptr, int status, + struct ldb_result *res) +{ + struct nss_cmd_ctx *cmdctx = talloc_get_type(ptr, struct nss_cmd_ctx); + struct cli_ctx *cctx = cmdctx->cctx; + struct getent_ctx *gctx = cctx->gctx; + uint8_t *body; + size_t blen; + uint32_t num; + int ret; + + /* get max num of entries to return in one call */ + sss_packet_get_body(cctx->creq->in, &body, &blen); + if (blen != sizeof(uint32_t)) { + ret = nss_cmd_send_error(cmdctx, EIO); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + nss_cmd_done(cmdctx); + } + num = *((uint32_t *)body); + + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + + if (status != LDB_SUCCESS) { + sss_packet_set_error(cctx->creq->out, status); + goto done; + } + + gctx->grps = talloc_steal(gctx, res); + + ret = nss_cmd_retgrent(cctx, num); + sss_packet_set_error(cctx->creq->out, ret); + +done: + nss_cmd_done(cmdctx); +} + +static int nss_cmd_getgrent(struct cli_ctx *cctx) +{ + struct nss_cmd_ctx *cmdctx; + struct getent_ctx *gctx; + uint8_t *body; + size_t blen; + uint32_t num; + int ret; + + DEBUG(4, ("Requesting info for all groups\n")); + + /* get max num of entries to return in one call */ + sss_packet_get_body(cctx->creq->in, &body, &blen); + if (blen != sizeof(uint32_t)) { + return EINVAL; + } + num = *((uint32_t *)body); + + /* see if we need to trigger an implicit setpwent() */ + if (cctx->gctx == NULL || cctx->gctx->grps == NULL) { + if (cctx->gctx == NULL) { + gctx = talloc_zero(cctx, struct getent_ctx); + if (!gctx) { + return ENOMEM; + } + cctx->gctx = gctx; + } + if (cctx->gctx->grps == NULL) { + ret = nss_cmd_setgrent_ext(cctx, true); + return ret; + } + } + + cmdctx = talloc(cctx, struct nss_cmd_ctx); + if (!cmdctx) { + return ENOMEM; + } + cmdctx->cctx = cctx; + + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + return ret; + } + + ret = nss_cmd_retgrent(cctx, num); + sss_packet_set_error(cctx->creq->out, ret); + nss_cmd_done(cmdctx); + return EOK; +} + +static int nss_cmd_endgrent(struct cli_ctx *cctx) +{ + struct nss_cmd_ctx *cmdctx; + int ret; + + DEBUG(4, ("Terminating request info for all groups\n")); + + cmdctx = talloc(cctx, struct nss_cmd_ctx); + if (!cmdctx) { + return ENOMEM; + } + cmdctx->cctx = cctx; + + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + + if (cctx->gctx == NULL) goto done; + if (cctx->gctx->grps == NULL) goto done; + + /* free results and reset */ + talloc_free(cctx->gctx->grps); + cctx->gctx->grps = NULL; + cctx->gctx->grp_cur = 0; + +done: + nss_cmd_done(cmdctx); + return EOK; +} + +static void nss_cmd_initgr_callback(void *ptr, int status, + struct ldb_result *res) +{ + struct nss_cmd_ctx *cmdctx = talloc_get_type(ptr, struct nss_cmd_ctx); + struct cli_ctx *cctx = cmdctx->cctx; + uint8_t *body; + size_t blen; + uint64_t gid; + uint32_t num; + int ret, i; + + /* create response packet */ + ret = sss_packet_new(cctx->creq, 0, + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + + if (status != LDB_SUCCESS) { + sss_packet_set_error(cctx->creq->out, status); + goto done; + } + + num = res->count; + /* the first 64 bit uint is really 2 32 units used to hold the number of + * results */ + ret = sss_packet_grow(cctx->creq->out, (1 + num) * sizeof(uint64_t)); + if (ret != EOK) { + sss_packet_set_error(cctx->creq->out, ret); + goto done; + } + sss_packet_get_body(cctx->creq->out, &body, &blen); + + for (i = 0; i < num; i++) { + gid = ldb_msg_find_attr_as_uint64(res->msgs[i], SYSDB_GR_GIDNUM, 0); + if (!gid) { + DEBUG(1, ("Incomplete group object for initgroups! Aborting\n")); + sss_packet_set_error(cctx->creq->out, EIO); + num = 0; + goto done; + } + ((uint64_t *)body)[i+1] = gid; + } + + ((uint32_t *)body)[0] = num; /* num results */ + ((uint32_t *)body)[1] = 0; /* reserved */ + +done: + nss_cmd_done(cmdctx); +} + +static void nss_cmd_getinitgr_callback(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int ret; + + if (err_maj) { + DEBUG(2, ("Unable to get information from Data Provider\n" + "Error: %u, %u, %s\n" + "Will try to return what we have in cache\n", + (unsigned int)err_maj, (unsigned int)err_min, err_msg)); + } + + ret = sysdb_initgroups(cmdctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, cmdctx->name, + dctx->legacy, + nss_cmd_initgr_callback, cmdctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + nss_cmd_done(cmdctx); + } +} + +static void nss_cmd_getinit_callback(void *ptr, int status, + struct ldb_result *res); + +static void nss_cmd_getinitnam_callback(uint16_t err_maj, uint32_t err_min, + const char *err_msg, void *ptr) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int ret; + + if (err_maj) { + DEBUG(2, ("Unable to get information from Data Provider\n" + "Error: %u, %u, %s\n" + "Will try to return what we have in cache\n", + (unsigned int)err_maj, (unsigned int)err_min, err_msg)); + } + + ret = sysdb_getpwnam(cmdctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, cmdctx->name, + dctx->legacy, + nss_cmd_getinit_callback, dctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + nss_cmd_done(cmdctx); + } +} + +static void nss_cmd_getinit_callback(void *ptr, int status, + struct ldb_result *res) +{ + struct nss_dom_ctx *dctx = talloc_get_type(ptr, struct nss_dom_ctx); + struct nss_cmd_ctx *cmdctx = dctx->cmdctx; + struct cli_ctx *cctx = cmdctx->cctx; + int timeout; + uint64_t lastUpdate; + uint8_t *body; + size_t blen; + bool call_provider = false; + int ret; + + if (status != LDB_SUCCESS) { + ret = nss_cmd_send_error(cmdctx, status); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + goto done; + } + + if (dctx->check_provider) { + switch (res->count) { + case 0: + call_provider = true; + break; + + default: + timeout = cmdctx->cctx->nctx->cache_timeout; + + lastUpdate = ldb_msg_find_attr_as_uint64(res->msgs[0], + SYSDB_LAST_UPDATE, 0); + if (lastUpdate + timeout < time(NULL)) { + call_provider = true; + } + } + } + + if (call_provider) { + + /* dont loop forever :-) */ + dctx->check_provider = false; + timeout = SSS_CLI_SOCKET_TIMEOUT/2; + + ret = nss_dp_send_acct_req(cctx->nctx, cmdctx, + nss_cmd_getinitnam_callback, dctx, + timeout, dctx->domain, NSS_DP_USER, + cmdctx->name, 0); + if (ret != EOK) { + DEBUG(3, ("Failed to dispatch request: %d(%s)\n", + ret, strerror(ret))); + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + goto done; + } + + return; + } + + switch (res->count) { + case 0: + + DEBUG(2, ("No results for initgroups call\n")); + + ret = sss_packet_new(cctx->creq, 2*sizeof(uint32_t), + sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + sss_packet_get_body(cctx->creq->out, &body, &blen); + ((uint32_t *)body)[0] = 0; /* 0 results */ + ((uint32_t *)body)[1] = 0; /* reserved */ + break; + + case 1: + + timeout = SSS_CLI_SOCKET_TIMEOUT/2; + ret = nss_dp_send_acct_req(cctx->nctx, cmdctx, + nss_cmd_getinitgr_callback, dctx, + timeout, dctx->domain, NSS_DP_INITGROUPS, + cmdctx->name, 0); + if (ret != EOK) { + DEBUG(3, ("Failed to dispatch request: %d(%s)\n", + ret, strerror(ret))); + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + goto done; + } + + return; + + default: + DEBUG(1, ("getpwnam call returned more than one result !?!\n")); + ret = nss_cmd_send_error(cmdctx, ret); + if (ret != EOK) { + NSS_CMD_FATAL_ERROR(cctx); + } + } + +done: + nss_cmd_done(cmdctx); +} + +/* for now, if we are online, try to always query the backend */ +static int nss_cmd_initgroups(struct cli_ctx *cctx) +{ + struct nss_cmd_ctx *cmdctx; + struct nss_dom_ctx *dctx; + uint8_t *body; + size_t blen; + int ret; + + cmdctx = talloc_zero(cctx, struct nss_cmd_ctx); + if (!cmdctx) { + return ENOMEM; + } + cmdctx->cctx = cctx; + + dctx = talloc_zero(cmdctx, struct nss_dom_ctx); + if (!dctx) return ENOMEM; + dctx->cmdctx = cmdctx; + + /* get user name to query */ + sss_packet_get_body(cctx->creq->in, &body, &blen); + cmdctx->name = (const char *)body; + /* if not terminated fail */ + if (cmdctx->name[blen -1] != '\0') { + return EINVAL; + } + + ret = nss_parse_name(dctx, (const char *)body); + if (ret != EOK) { + DEBUG(1, ("Invalid name received\n")); + talloc_free(cmdctx); + return ret; + } + DEBUG(4, ("Requesting info for [%s] from [%s]\n", + cmdctx->name, dctx->domain)); + + ret = sysdb_getpwnam(cmdctx, cctx->ev, cctx->nctx->sysdb, + dctx->domain, cmdctx->name, + dctx->legacy, + nss_cmd_getinit_callback, dctx); + if (ret != EOK) { + DEBUG(1, ("Failed to make request to our cache!\n")); + + ret = nss_cmd_send_error(cmdctx, ret); + if (ret == EOK) { + nss_cmd_done(cmdctx); + } + return ret; + } + + return EOK; +} + +struct nss_cmd_table sss_cmds[] = {}; +struct nss_cmd_table nss_cmds[] = { + {SSS_GET_VERSION, nss_cmd_get_version}, + {SSS_NSS_GETPWNAM, nss_cmd_getpwnam}, + {SSS_NSS_GETPWUID, nss_cmd_getpwuid}, + {SSS_NSS_SETPWENT, nss_cmd_setpwent}, + {SSS_NSS_GETPWENT, nss_cmd_getpwent}, + {SSS_NSS_ENDPWENT, nss_cmd_endpwent}, + {SSS_NSS_GETGRNAM, nss_cmd_getgrnam}, + {SSS_NSS_GETGRGID, nss_cmd_getgrgid}, + {SSS_NSS_SETGRENT, nss_cmd_setgrent}, + {SSS_NSS_GETGRENT, nss_cmd_getgrent}, + {SSS_NSS_ENDGRENT, nss_cmd_endgrent}, + {SSS_NSS_INITGR, nss_cmd_initgroups}, + {SSS_CLI_NULL, NULL} +}; + +int nss_cmd_execute(struct cli_ctx *cctx) +{ + enum sss_cli_command cmd; + int i; + + cmd = sss_packet_get_cmd(cctx->creq->in); + + for (i = 0; nss_cmds[i].cmd != SSS_CLI_NULL; i++) { + if (cmd == nss_cmds[i].cmd) { + return nss_cmds[i].fn(cctx); + } + } + + return EINVAL; +} + diff --git a/server/responder/nss/nsssrv_dp.c b/server/responder/nss/nsssrv_dp.c new file mode 100644 index 00000000..46e21801 --- /dev/null +++ b/server/responder/nss/nsssrv_dp.c @@ -0,0 +1,433 @@ +/* + SSSD + + NSS Responder - Data Provider Interfaces + + Copyright (C) Simo Sorce <ssorce@redhat.com> 2008 + + 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 <sys/time.h> +#include <time.h> +#include "util/util.h" +#include "responder/common/responder_packet.h" +#include "responder/nss/nsssrv.h" +#include "providers/data_provider.h" +#include "sbus/sbus_client.h" +#include "providers/dp_sbus.h" + +struct nss_dp_req { + nss_dp_callback_t callback; + void *callback_ctx; + struct timed_event *te; + DBusPendingCall *pending_reply; +}; + +static int nss_dp_req_destructor(void *ptr) +{ + struct nss_dp_req *req = talloc_get_type(ptr, struct nss_dp_req); + + if (req->pending_reply) { + dbus_pending_call_cancel(req->pending_reply); + } + + return 0; +} + +static void nss_dp_send_acct_timeout(struct event_context *ev, + struct timed_event *te, + struct timeval t, void *data) +{ + struct nss_dp_req *ndp_req; + dbus_uint16_t err_maj = DP_ERR_TIMEOUT; + dbus_uint32_t err_min = EIO; + const char *err_msg = "Request timed out"; + + ndp_req = talloc_get_type(data, struct nss_dp_req); + + ndp_req->callback(err_maj, err_min, err_msg, ndp_req->callback_ctx); + + talloc_free(ndp_req); +} + +static int nss_dp_get_reply(DBusPendingCall *pending, + dbus_uint16_t *err_maj, + dbus_uint32_t *err_min, + const char **err_msg); + +static void nss_dp_send_acct_callback(DBusPendingCall *pending, void *ptr) +{ + struct nss_dp_req *ndp_req; + dbus_uint16_t err_maj; + dbus_uint32_t err_min; + const char *err_msg; + int ret; + + ndp_req = talloc_get_type(ptr, struct nss_dp_req); + + /* free timeout event and remove request destructor */ + talloc_free(ndp_req->te); + talloc_set_destructor(ndp_req, NULL); + + ret = nss_dp_get_reply(pending, &err_maj, &err_min, &err_msg); + if (ret != EOK) { + err_maj = DP_ERR_FATAL; + err_min = ret; + err_msg = "Failed to get reply from Data Provider"; + } + + ndp_req->callback(err_maj, err_min, err_msg, ndp_req->callback_ctx); + + talloc_free(ndp_req); +} + +int nss_dp_send_acct_req(struct nss_ctx *nctx, TALLOC_CTX *memctx, + nss_dp_callback_t callback, void *callback_ctx, + int timeout, const char *domain, int type, + const char *opt_name, uint32_t opt_id) +{ + struct nss_dp_req *ndp_req; + DBusMessage *msg; + DBusPendingCall *pending_reply; + DBusConnection *conn; + dbus_bool_t ret; + uint32_t be_type; + const char *attrs = "core"; + char *filter; + struct timeval tv; + + /* either, or, not both */ + if (opt_name && opt_id) { + return EINVAL; + } + + if (!domain) { + return EINVAL; + } + + switch (type) { + case NSS_DP_USER: + be_type = BE_REQ_USER; + break; + case NSS_DP_GROUP: + be_type = BE_REQ_GROUP; + break; + case NSS_DP_INITGROUPS: + be_type = BE_REQ_INITGROUPS; + break; + default: + return EINVAL; + } + + if (opt_name) { + filter = talloc_asprintf(memctx, "name=%s", opt_name); + } else if (opt_id) { + filter = talloc_asprintf(memctx, "idnumber=%u", opt_id); + } else { + filter = talloc_strdup(memctx, "name=*"); + } + if (!filter) { + talloc_free(nctx); + return ENOMEM; + } + + conn = sbus_get_connection(nctx->dp_ctx->scon_ctx); + + /* create the message */ + msg = dbus_message_new_method_call(NULL, + DP_CLI_PATH, + DP_CLI_INTERFACE, + DP_SRV_METHOD_GETACCTINFO); + if (msg == NULL) { + DEBUG(0,("Out of memory?!\n")); + return ENOMEM; + } + + DEBUG(4, ("Sending request for [%s][%u][%s][%s]\n", + domain, be_type, attrs, filter)); + + ret = dbus_message_append_args(msg, + DBUS_TYPE_STRING, &domain, + DBUS_TYPE_UINT32, &be_type, + DBUS_TYPE_STRING, &attrs, + DBUS_TYPE_STRING, &filter, + DBUS_TYPE_INVALID); + if (!ret) { + DEBUG(1,("Failed to build message\n")); + return EIO; + } + + ret = dbus_connection_send_with_reply(conn, msg, &pending_reply, + 600000 /* TODO: set timeout */); + if (!ret) { + /* + * Critical Failure + * We can't communicate on this connection + * We'll drop it using the default destructor. + */ + DEBUG(0, ("D-BUS send failed.\n")); + dbus_message_unref(msg); + return EIO; + } + + ndp_req = talloc_zero(memctx, struct nss_dp_req); + if (!ndp_req) { + dbus_message_unref(msg); + return ENOMEM; + } + ndp_req->callback = callback; + ndp_req->callback_ctx = callback_ctx; + + /* set up destructor */ + ndp_req->pending_reply = pending_reply; + talloc_set_destructor((TALLOC_CTX *)ndp_req, nss_dp_req_destructor); + + /* setup the timeout handler */ + gettimeofday(&tv, NULL); + tv.tv_sec += timeout/1000; + tv.tv_usec += (timeout%1000) * 1000; + ndp_req->te = event_add_timed(nctx->ev, memctx, tv, + nss_dp_send_acct_timeout, ndp_req); + + /* Set up the reply handler */ + dbus_pending_call_set_notify(pending_reply, + nss_dp_send_acct_callback, + ndp_req, NULL); + dbus_message_unref(msg); + + return EOK; +} + +static int nss_dp_get_reply(DBusPendingCall *pending, + dbus_uint16_t *err_maj, + dbus_uint32_t *err_min, + const char **err_msg) +{ + DBusMessage *reply; + DBusError dbus_error; + dbus_bool_t ret; + int type; + int err = EOK; + + dbus_error_init(&dbus_error); + + reply = dbus_pending_call_steal_reply(pending); + if (!reply) { + /* reply should never be null. This function shouldn't be called + * until reply is valid or timeout has occurred. If reply is NULL + * here, something is seriously wrong and we should bail out. + */ + DEBUG(0, ("Severe error. A reply callback was called but no reply was received and no timeout occurred\n")); + + /* FIXME: Destroy this connection ? */ + err = EIO; + goto done; + } + + type = dbus_message_get_type(reply); + switch (type) { + case DBUS_MESSAGE_TYPE_METHOD_RETURN: + ret = dbus_message_get_args(reply, &dbus_error, + DBUS_TYPE_UINT16, err_maj, + DBUS_TYPE_UINT32, err_min, + DBUS_TYPE_STRING, err_msg, + DBUS_TYPE_INVALID); + if (!ret) { + DEBUG(1,("Filed to parse message\n")); + /* FIXME: Destroy this connection ? */ + if (dbus_error_is_set(&dbus_error)) dbus_error_free(&dbus_error); + err = EIO; + goto done; + } + + DEBUG(4, ("Got reply (%u, %u, %s) from Data Provider\n", + (unsigned int)*err_maj, (unsigned int)*err_min, *err_msg)); + + break; + + case DBUS_MESSAGE_TYPE_ERROR: + DEBUG(0,("The Data Provider returned an error [%s]\n", + dbus_message_get_error_name(reply))); + /* Falling through to default intentionally*/ + default: + /* + * Timeout or other error occurred or something + * unexpected happened. + * It doesn't matter which, because either way we + * know that this connection isn't trustworthy. + * We'll destroy it now. + */ + + /* FIXME: Destroy this connection ? */ + err = EIO; + } + +done: + dbus_pending_call_unref(pending); + dbus_message_unref(reply); + + return err; +} + +static int nss_dp_identity(DBusMessage *message, struct sbus_conn_ctx *sconn) +{ + dbus_uint16_t version = DATA_PROVIDER_VERSION; + dbus_uint16_t clitype = DP_CLI_FRONTEND; + const char *cliname = "NSS"; + const char *nullname = ""; + DBusMessage *reply; + dbus_bool_t ret; + + DEBUG(4,("Sending ID reply: (%d,%d,%s)\n", + clitype, version, cliname)); + + reply = dbus_message_new_method_return(message); + if (!reply) return ENOMEM; + + ret = dbus_message_append_args(reply, + DBUS_TYPE_UINT16, &clitype, + DBUS_TYPE_UINT16, &version, + DBUS_TYPE_STRING, &cliname, + DBUS_TYPE_STRING, &nullname, + DBUS_TYPE_INVALID); + if (!ret) { + dbus_message_unref(reply); + return EIO; + } + + /* send reply back */ + sbus_conn_send_reply(sconn, reply); + dbus_message_unref(reply); + + return EOK; +} + +struct sbus_method nss_dp_methods[] = { + { DP_CLI_METHOD_IDENTITY, nss_dp_identity }, + { NULL, NULL } +}; + +struct nss_dp_pvt_ctx { + struct nss_ctx *nctx; + struct sbus_method *methods; + time_t last_retry; + int retries; +}; + +static int nss_dp_conn_destructor(void *data); +static void nss_dp_reconnect(struct event_context *ev, + struct timed_event *te, + struct timeval tv, void *data); + +static void nss_dp_conn_reconnect(struct nss_dp_pvt_ctx *pvt) +{ + struct nss_ctx *nctx; + struct timed_event *te; + struct timeval tv; + struct sbus_method_ctx *sm_ctx; + char *sbus_address; + time_t now; + int ret; + + now = time(NULL); + + /* reset retry if last reconnect was > 60 sec. ago */ + if (pvt->last_retry + 60 < now) pvt->retries = 0; + if (pvt->retries >= 3) { + DEBUG(4, ("Too many reconnect retries! Giving up\n")); + return; + } + + pvt->last_retry = now; + pvt->retries++; + + nctx = pvt->nctx; + + ret = dp_get_sbus_address(nctx, nctx->cdb, &sbus_address); + if (ret != EOK) { + DEBUG(0, ("Could not locate data provider address.\n")); + return; + } + + ret = dp_init_sbus_methods(nctx, pvt->methods, &sm_ctx); + if (ret != EOK) { + DEBUG(0, ("Could not initialize SBUS methods.\n")); + return; + } + + ret = sbus_client_init(nctx, nctx->ev, + sbus_address, sm_ctx, + pvt, nss_dp_conn_destructor, + &nctx->dp_ctx); + if (ret != EOK) { + DEBUG(4, ("Failed to reconnect [%d(%s)]!\n", ret, strerror(ret))); + + tv.tv_sec = now +5; + tv.tv_usec = 0; + te = event_add_timed(nctx->ev, nctx, tv, nss_dp_reconnect, pvt); + if (te == NULL) { + DEBUG(4, ("Failed to add timed event! Giving up\n")); + } else { + DEBUG(4, ("Retrying in 5 seconds\n")); + } + } +} + +static void nss_dp_reconnect(struct event_context *ev, + struct timed_event *te, + struct timeval tv, void *data) +{ + struct nss_dp_pvt_ctx *pvt; + + pvt = talloc_get_type(data, struct nss_dp_pvt_ctx); + + nss_dp_conn_reconnect(pvt); +} + +int nss_dp_conn_destructor(void *data) +{ + struct nss_dp_pvt_ctx *pvt; + struct sbus_conn_ctx *scon; + + scon = talloc_get_type(data, struct sbus_conn_ctx); + if (!scon) return 0; + + /* if this is a regular disconnect just quit */ + if (sbus_conn_disconnecting(scon)) return 0; + + pvt = talloc_get_type(sbus_conn_get_private_data(scon), + struct nss_dp_pvt_ctx); + if (pvt) return 0; + + nss_dp_conn_reconnect(pvt); + + return 0; +} + +int nss_dp_init(struct nss_ctx *nctx) +{ + struct nss_dp_pvt_ctx *pvt; + + pvt = talloc_zero(nctx, struct nss_dp_pvt_ctx); + if (!pvt) return ENOMEM; + + pvt->nctx = nctx; + pvt->methods = nss_dp_methods; + + nss_dp_conn_reconnect(pvt); + + return EOK; +} + diff --git a/server/responder/pam/pamsrv.c b/server/responder/pam/pamsrv.c new file mode 100644 index 00000000..b6593bcf --- /dev/null +++ b/server/responder/pam/pamsrv.c @@ -0,0 +1,171 @@ +/* + SSSD + + PAM Responder + + Copyright (C) Simo Sorce <ssorce@redhat.com> 2008 + + 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 "popt.h" +#include "util/util.h" +#include "db/sysdb.h" +#include "confdb/confdb.h" +#include "dbus/dbus.h" +#include "sbus/sssd_dbus.h" +#include "util/btreemap.h" +#include "responder/common/responder_packet.h" +#include "responder/common/responder_cmd.h" +#include "responder/common/responder_common.h" +#include "providers/data_provider.h" +#include "monitor/monitor_sbus.h" +#include "monitor/monitor_interfaces.h" +#include "sbus/sbus_client.h" +#include "responder/pam/pamsrv.h" + +#define SSS_PAM_PIPE_NAME "pam" +#define PAM_SBUS_SERVICE_VERSION 0x0001 +#define PAM_SBUS_SERVICE_NAME "pam" +#define CONFDB_SOCKET_PATH "config/services/pam" + +static int service_identity(DBusMessage *message, struct sbus_conn_ctx *sconn); +static int service_pong(DBusMessage *message, struct sbus_conn_ctx *sconn); +static int service_reload(DBusMessage *message, struct sbus_conn_ctx *sconn); + +struct sbus_method sss_sbus_methods[] = { + {SERVICE_METHOD_IDENTITY, service_identity}, + {SERVICE_METHOD_PING, service_pong}, + {SERVICE_METHOD_RELOAD, service_reload}, + {NULL, NULL} +}; + +static int service_identity(DBusMessage *message, struct sbus_conn_ctx *sconn) +{ + dbus_uint16_t version = PAM_SBUS_SERVICE_VERSION; + const char *name = PAM_SBUS_SERVICE_NAME; + DBusMessage *reply; + dbus_bool_t ret; + + DEBUG(4,("Sending ID reply: (%s,%d)\n", name, version)); + + reply = dbus_message_new_method_return(message); + if (!reply) return ENOMEM; + + ret = dbus_message_append_args(reply, + DBUS_TYPE_STRING, &name, + DBUS_TYPE_UINT16, &version, + DBUS_TYPE_INVALID); + if (!ret) { + dbus_message_unref(reply); + return EIO; + } + + /* send reply back */ + sbus_conn_send_reply(sconn, reply); + dbus_message_unref(reply); + + return EOK; +} + +static int service_pong(DBusMessage *message, struct sbus_conn_ctx *sconn) +{ + DBusMessage *reply; + dbus_bool_t ret; + + reply = dbus_message_new_method_return(message); + if (!reply) return ENOMEM; + + ret = dbus_message_append_args(reply, DBUS_TYPE_INVALID); + if (!ret) { + return EIO; + } + + /* send reply back */ + sbus_conn_send_reply(sconn, reply); + dbus_message_unref(reply); + + return EOK; +} + +static int service_reload(DBusMessage *message, struct sbus_conn_ctx *sconn) { + /* Monitor calls this function when we need to reload + * our configuration information. Perform whatever steps + * are needed to update the configuration objects. + */ + + /* Send an empty reply to acknowledge receipt */ + return service_pong(message, sconn); +} + +int main(int argc, const char *argv[]) +{ + int opt; + poptContext pc; + struct main_context *main_ctx; + int ret; + struct sbus_method *pam_dp_methods; + struct sss_cmd_table *sss_cmds; + + struct poptOption long_options[] = { + POPT_AUTOHELP + SSSD_MAIN_OPTS + { NULL } + }; + + 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; + } + } + + poptFreeContext(pc); + + /* set up things like debug , signals, daemonization, etc... */ + ret = server_setup("sssd[pam]", 0, &main_ctx); + if (ret != EOK) return 2; + + pam_dp_methods = register_pam_dp_methods(); + sss_cmds = register_sss_cmds(); + ret = sss_process_init(main_ctx, + main_ctx->event_ctx, + main_ctx->confdb_ctx, + sss_sbus_methods, + sss_cmds, + SSS_PAM_PIPE_NAME, + CONFDB_SOCKET_PATH, + pam_dp_methods); + if (ret != EOK) return 3; + + /* loop on main */ + server_loop(main_ctx); + + return 0; +} + diff --git a/server/responder/pam/pamsrv.h b/server/responder/pam/pamsrv.h new file mode 100644 index 00000000..bb0082ac --- /dev/null +++ b/server/responder/pam/pamsrv.h @@ -0,0 +1,33 @@ +#include "sbus/sssd_dbus.h" +#include "responder/common/responder_cmd.h" + +#define PAM_DP_TIMEOUT 5000 + +#define DEBUG_PAM_DATA(level, pd) do { \ + if (level <= debug_level) pam_print_data(level, pd); \ +} while(0); + +struct pam_data { + int cmd; + uint32_t authtok_type; + uint32_t authtok_size; + uint32_t newauthtok_type; + uint32_t newauthtok_size; + char *domain; + char *user; + char *service; + char *tty; + char *ruser; + char *rhost; + uint8_t *authtok; + uint8_t *newauthtok; +}; + +void pam_print_data(int l, struct pam_data *pd); + +typedef void (*pam_dp_callback_t)(struct cli_ctx *cctx, int pam_status, char *domain); + +struct sbus_method *register_pam_dp_methods(void); +struct sss_cmd_table *register_sss_cmds(void); +int pam_dp_send_req(struct cli_ctx *cctx, pam_dp_callback_t callback, + int timeout, struct pam_data *pd); diff --git a/server/responder/pam/pamsrv_cmd.c b/server/responder/pam/pamsrv_cmd.c new file mode 100644 index 00000000..4fdded30 --- /dev/null +++ b/server/responder/pam/pamsrv_cmd.c @@ -0,0 +1,196 @@ +#include <errno.h> +#include <talloc.h> + +#include "util/util.h" +#include "responder/common/responder_common.h" +#include "responder/common/responder_cmd.h" +#include "responder/common/responder_packet.h" +#include "responder/pam/pamsrv.h" + +static int pam_parse_in_data(uint8_t *body, size_t blen, struct pam_data *pd) { + int start; + int end; + int last=blen-1; + char *delim; + + start = end = 0; + while ( end < last && body[end++]!='\0'); + pd->user = (char *) &body[start]; + + delim = strchr(pd->user, SSS_DOMAIN_DELIM); + if (delim != NULL ) { + *delim = '\0'; + pd->domain = delim+1; + } else { + pd->domain = NULL; + } + + start = end; + while ( end < last && body[end++]!='\0'); + pd->service = (char *) &body[start]; + + start = end; + while ( end < last && body[end++]!='\0'); + pd->tty = (char *) &body[start]; + + start = end; + while ( end < last && body[end++]!='\0'); + pd->ruser = (char *) &body[start]; + + start = end; + while ( end < last && body[end++]!='\0'); + pd->rhost = (char *) &body[start]; + + start = end; + pd->authtok_type = (int) body[start]; + start += sizeof(uint32_t); + pd->authtok_size = (int) body[start]; + start += sizeof(uint32_t); + end = start+pd->authtok_size; + if ( pd->authtok_size == 0 ) { + pd->authtok = NULL; + } else { + if ( end <= blen ) { + pd->authtok = (uint8_t *) &body[start]; + } else { + DEBUG(1, ("Invalid authtok size: %d\n", pd->authtok_size)); + return EINVAL; + } + } + + start = end; + pd->newauthtok_type = (int) body[start]; + start += sizeof(uint32_t); + pd->newauthtok_size = (int) body[start]; + start += sizeof(uint32_t); + end = start+pd->newauthtok_size; + if ( pd->newauthtok_size == 0 ) { + pd->newauthtok = NULL; + } else { + if ( end <= blen ) { + pd->newauthtok = (uint8_t *) &body[start]; + } else { + DEBUG(1, ("Invalid newauthtok size: %d\n", pd->newauthtok_size)); + return EINVAL; + } + } + + DEBUG_PAM_DATA(4, pd); + + return EOK; +} + +static void pam_reply(struct cli_ctx *cctx, int pam_status, char *domain) { + struct sss_cmd_ctx *nctx; + int32_t ret_status = pam_status; + uint8_t *body; + size_t blen; + int ret; + int err = EOK; + + DEBUG(4, ("pam_reply get called.\n")); + nctx = talloc_zero(cctx, struct sss_cmd_ctx); + if (!nctx) { + err = ENOMEM; + goto done; + } + nctx->cctx = cctx; + nctx->check_expiration = true; + + ret = sss_packet_new(cctx->creq, 0, sss_packet_get_cmd(cctx->creq->in), + &cctx->creq->out); + if (ret != EOK) { + err = ret; + goto done; + } + + ret = sss_packet_grow(cctx->creq->out, sizeof(int) + strlen(domain)+1 ); + if (ret != EOK) { + err = ret; + goto done; + } + + sss_packet_get_body(cctx->creq->out, &body, &blen); + DEBUG(4, ("blen: %d\n", blen)); + memcpy(body, &ret_status, sizeof(int32_t)); + memcpy(body+sizeof(int32_t), domain, strlen(domain)+1); + +done: + sss_cmd_done(nctx); +} + +static int pam_forwarder(struct cli_ctx *cctx, int pam_cmd) +{ + uint8_t *body; + size_t blen; + int ret; + struct pam_data *pd; + + pd = talloc(cctx, struct pam_data); + if (pd == NULL) return ENOMEM; + + sss_packet_get_body(cctx->creq->in, &body, &blen); + if (blen >= sizeof(uint32_t) && + ((uint32_t *)(&body[blen - sizeof(uint32_t)]))[0] != END_OF_PAM_REQUEST) { + DEBUG(1, ("Received data not terminated.\n")); + talloc_free(pd); + return EINVAL; + } + + pd->cmd = pam_cmd; + ret=pam_parse_in_data(body, blen, pd); + if( ret != 0 ) { + talloc_free(pd); + return EINVAL; + } + + ret=pam_dp_send_req(cctx, pam_reply, PAM_DP_TIMEOUT, pd); + DEBUG(4, ("pam_dp_send_req returned %d\n", ret)); + + return ret; +} + +static int pam_cmd_authenticate(struct cli_ctx *cctx) { + DEBUG(4, ("entering pam_cmd_authenticate\n")); + return pam_forwarder(cctx, SSS_PAM_AUTHENTICATE); +} + +static int pam_cmd_setcred(struct cli_ctx *cctx) { + DEBUG(4, ("entering pam_cmd_setcred\n")); + return pam_forwarder(cctx, SSS_PAM_SETCRED); +} + +static int pam_cmd_acct_mgmt(struct cli_ctx *cctx) { + DEBUG(4, ("entering pam_cmd_acct_mgmt\n")); + return pam_forwarder(cctx, SSS_PAM_ACCT_MGMT); +} + +static int pam_cmd_open_session(struct cli_ctx *cctx) { + DEBUG(4, ("entering pam_cmd_open_session\n")); + return pam_forwarder(cctx, SSS_PAM_OPEN_SESSION); +} + +static int pam_cmd_close_session(struct cli_ctx *cctx) { + DEBUG(4, ("entering pam_cmd_close_session\n")); + return pam_forwarder(cctx, SSS_PAM_CLOSE_SESSION); +} + +static int pam_cmd_chauthtok(struct cli_ctx *cctx) { + DEBUG(4, ("entering pam_cmd_chauthtok\n")); + return pam_forwarder(cctx, SSS_PAM_CHAUTHTOK); +} + +struct sss_cmd_table *register_sss_cmds(void) { + static struct sss_cmd_table sss_cmds[] = { + {SSS_GET_VERSION, sss_cmd_get_version}, + {SSS_PAM_AUTHENTICATE, pam_cmd_authenticate}, + {SSS_PAM_SETCRED, pam_cmd_setcred}, + {SSS_PAM_ACCT_MGMT, pam_cmd_acct_mgmt}, + {SSS_PAM_OPEN_SESSION, pam_cmd_open_session}, + {SSS_PAM_CLOSE_SESSION, pam_cmd_close_session}, + {SSS_PAM_CHAUTHTOK, pam_cmd_chauthtok}, + {SSS_CLI_NULL, NULL} + }; + + return sss_cmds; +} diff --git a/server/responder/pam/pamsrv_dp.c b/server/responder/pam/pamsrv_dp.c new file mode 100644 index 00000000..8a10c6bd --- /dev/null +++ b/server/responder/pam/pamsrv_dp.c @@ -0,0 +1,215 @@ +/* + SSSD + + NSS Responder - Data Provider Interfaces + + Copyright (C) Simo Sorce <ssorce@redhat.com> 2008 + + 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 <sys/time.h> +#include <time.h> + +#include <talloc.h> +#include <security/pam_modules.h> + +#include "util/util.h" +#include "responder/common/responder_packet.h" +#include "responder/nss/nsssrv.h" +#include "providers/data_provider.h" +#include "sbus/sbus_client.h" +#include "providers/dp_sbus.h" +#include "responder/pam/pamsrv.h" + +struct pam_reply_ctx { + struct cli_ctx *cctx; + pam_dp_callback_t callback; +}; + +static void pam_process_dp_reply(DBusPendingCall *pending, void *ptr) { + DBusError dbus_error; + DBusMessage* msg; + int ret; + int type; + dbus_uint32_t pam_status; + char *domain; + struct pam_reply_ctx *rctx; + + rctx = talloc_get_type(ptr, struct pam_reply_ctx); + + dbus_error_init(&dbus_error); + + dbus_pending_call_block(pending); + msg = dbus_pending_call_steal_reply(pending); + if (msg == NULL) { + DEBUG(0, ("Severe error. A reply callback was called but no reply was received and no timeout occurred\n")); + pam_status = PAM_SYSTEM_ERR; + goto done; + } + + + type = dbus_message_get_type(msg); + switch (type) { + case DBUS_MESSAGE_TYPE_METHOD_RETURN: + ret = dbus_message_get_args(msg, &dbus_error, + DBUS_TYPE_UINT32, &pam_status, + DBUS_TYPE_STRING, &domain, + DBUS_TYPE_INVALID); + if (!ret) { + DEBUG(0, ("Failed to parse reply.\n")); + pam_status = PAM_SYSTEM_ERR; + domain = ""; + goto done; + } + DEBUG(4, ("received: [%d][%s]\n", pam_status, domain)); + break; + case DBUS_MESSAGE_TYPE_ERROR: + DEBUG(0, ("Reply error.\n")); + pam_status = PAM_SYSTEM_ERR; + break; + default: + DEBUG(0, ("Default... what now?.\n")); + pam_status = PAM_SYSTEM_ERR; + } + + +done: + dbus_pending_call_unref(pending); + dbus_message_unref(msg); + rctx->callback(rctx->cctx, pam_status, domain); +} + +int pam_dp_send_req(struct cli_ctx *cctx, + pam_dp_callback_t callback, + int timeout, struct pam_data *pd) { + DBusMessage *msg; + DBusPendingCall *pending_reply; + DBusConnection *conn; + DBusError dbus_error; + dbus_bool_t ret; + struct pam_reply_ctx *rctx; + + rctx = talloc(cctx, struct pam_reply_ctx); + if (rctx == NULL) { + DEBUG(0,("Out of memory?!\n")); + return ENOMEM; + } + rctx->cctx=cctx; + rctx->callback=callback; + + if (pd->domain==NULL || + pd->user==NULL || + pd->service==NULL || + pd->tty==NULL || + pd->ruser==NULL || + pd->rhost==NULL ) { + return EINVAL; + } + + conn = sbus_get_connection(cctx->nctx->dp_ctx->scon_ctx); + dbus_error_init(&dbus_error); + + msg = dbus_message_new_method_call(NULL, + DP_CLI_PATH, + DP_CLI_INTERFACE, + DP_SRV_METHOD_PAMHANDLER); + if (msg == NULL) { + DEBUG(0,("Out of memory?!\n")); + return ENOMEM; + } + + + DEBUG(4, ("Sending request with the following data:\n")); + DEBUG_PAM_DATA(4, pd); + + ret = dbus_message_append_args(msg, + DBUS_TYPE_INT32, &(pd->cmd), + DBUS_TYPE_STRING, &(pd->domain), + DBUS_TYPE_STRING, &(pd->user), + DBUS_TYPE_STRING, &(pd->service), + DBUS_TYPE_STRING, &(pd->tty), + DBUS_TYPE_STRING, &(pd->ruser), + DBUS_TYPE_STRING, &(pd->rhost), + DBUS_TYPE_INT32, &(pd->authtok_type), + DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, + &(pd->authtok), pd->authtok_size, + DBUS_TYPE_INT32, &(pd->newauthtok_type), + DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, + &(pd->newauthtok), pd->newauthtok_size, + DBUS_TYPE_INVALID); + if (!ret) { + DEBUG(1,("Failed to build message\n")); + return EIO; + } + + ret = dbus_connection_send_with_reply(conn, msg, &pending_reply, timeout); + if (!ret) { + /* + * Critical Failure + * We can't communicate on this connection + * We'll drop it using the default destructor. + */ + DEBUG(0, ("D-BUS send failed.\n")); + dbus_message_unref(msg); + return EIO; + } + + dbus_pending_call_set_notify(pending_reply, pam_process_dp_reply, rctx, + NULL); + dbus_message_unref(msg); + + return EOK; +} + +static int pam_dp_identity(DBusMessage *message, struct sbus_conn_ctx *sconn) +{ + dbus_uint16_t version = DATA_PROVIDER_VERSION; + dbus_uint16_t clitype = DP_CLI_FRONTEND; + const char *cliname = "PAM"; + const char *nullname = ""; + DBusMessage *reply; + dbus_bool_t ret; + + DEBUG(4,("Sending ID reply: (%d,%d,%s)\n", clitype, version, cliname)); + + reply = dbus_message_new_method_return(message); + if (!reply) return ENOMEM; + + ret = dbus_message_append_args(reply, + DBUS_TYPE_UINT16, &clitype, + DBUS_TYPE_UINT16, &version, + DBUS_TYPE_STRING, &cliname, + DBUS_TYPE_STRING, &nullname, + DBUS_TYPE_INVALID); + if (!ret) { + dbus_message_unref(reply); + return EIO; + } + + /* send reply back */ + sbus_conn_send_reply(sconn, reply); + dbus_message_unref(reply); + + return EOK; +} + +struct sbus_method *register_pam_dp_methods(void) { + static struct sbus_method pam_dp_methods[] = { + { DP_CLI_METHOD_IDENTITY, pam_dp_identity }, + { NULL, NULL } + }; + + return pam_dp_methods; +} diff --git a/server/responder/pam/pamsrv_util.c b/server/responder/pam/pamsrv_util.c new file mode 100644 index 00000000..5dab9b67 --- /dev/null +++ b/server/responder/pam/pamsrv_util.c @@ -0,0 +1,16 @@ +#include "util/util.h" +#include "responder/pam/pamsrv.h" + +void pam_print_data(int l, struct pam_data *pd) { + DEBUG(l, ("command: %d\n", pd->cmd)); + DEBUG(l, ("domain: %s\n", pd->domain)); + DEBUG(l, ("user: %s\n", pd->user)); + DEBUG(l, ("service: %s\n", pd->service)); + DEBUG(l, ("tty: %s\n", pd->tty)); + DEBUG(l, ("ruser: %s\n", pd->ruser)); + DEBUG(l, ("rhost: %s\n", pd->rhost)); + DEBUG(l, ("authtok type: %d\n", pd->authtok_type)); + DEBUG(l, ("authtok size: %d\n", pd->authtok_size)); + DEBUG(l, ("newauthtok type: %d\n", pd->newauthtok_type)); + DEBUG(l, ("newauthtok size: %d\n", pd->newauthtok_size)); +} |