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authorJakub Hrozek <jhrozek@redhat.com>2011-12-16 13:30:48 +0100
committerStephen Gallagher <sgallagh@redhat.com>2011-12-16 14:46:18 -0500
commit20e310e32a47e861ce0c11bcd1dcf89dc78d8aba (patch)
tree247eb312ce11d684941a5ad04fa2ddb29220c878 /src
parent2827b0d03f7b6bafa504d22a5d7ca39cbda048b3 (diff)
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SUDO Integration - responder - get sudo rules logic
Diffstat (limited to 'src')
-rw-r--r--src/responder/sudo/sudosrv_get_sudorules.c446
1 files changed, 444 insertions, 2 deletions
diff --git a/src/responder/sudo/sudosrv_get_sudorules.c b/src/responder/sudo/sudosrv_get_sudorules.c
index aa466c8b..5d54f95a 100644
--- a/src/responder/sudo/sudosrv_get_sudorules.c
+++ b/src/responder/sudo/sudosrv_get_sudorules.c
@@ -27,11 +27,453 @@
#include "db/sysdb_sudo.h"
#include "responder/sudo/sudosrv_private.h"
+static errno_t sudosrv_get_user(struct sudo_dom_ctx *dctx);
+static errno_t sudosrv_get_rules(struct sudo_dom_ctx *dctx);
+
errno_t sudosrv_get_sudorules(struct sudo_dom_ctx *dctx)
{
- dctx->res = NULL;
- dctx->res_count = 0;
+ errno_t ret;
+
+ dctx->check_provider = true;
+ ret = sudosrv_get_user(dctx);
+ if (ret == EAGAIN) {
+ DEBUG(SSSDBG_TRACE_INTERNAL,
+ ("Looking up the user info from Data Provider\n"));
+ return EAGAIN;
+ } else if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ ("Error looking up user information [%d]: %s\n", ret, strerror(ret)));
+ return ret;
+ }
+
+ /* OK, got the user from cache. Try to get the rules. */
+ ret = sudosrv_get_rules(dctx);
+ if (ret == EAGAIN) {
+ DEBUG(SSSDBG_TRACE_INTERNAL,
+ ("Looking up the sudo rules from Data Provider\n"));
+ return EAGAIN;
+ } else if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ ("Error looking up sudo rules [%d]: %s\n", ret, strerror(ret)));
+ return ret;
+ }
+
+ return EOK;
+}
+
+static void sudosrv_dp_send_acct_req_done(struct tevent_req *req);
+static void sudosrv_check_user_dp_callback(uint16_t err_maj, uint32_t err_min,
+ const char *err_msg, void *ptr);
+
+static errno_t sudosrv_get_user(struct sudo_dom_ctx *dctx)
+{
+ struct sss_domain_info *dom = dctx->domain;
+ struct sudo_cmd_ctx *cmd_ctx = dctx->cmd_ctx;
+ struct cli_ctx *cli_ctx = dctx->cmd_ctx->cli_ctx;
+ struct sysdb_ctx *sysdb;
+ time_t cache_expire = 0;
+ struct tevent_req *dpreq;
+ struct dp_callback_ctx *cb_ctx;
+ errno_t ret;
+
+ while (dom) {
+ /* if it is a domainless search, skip domains that require fully
+ * qualified names instead */
+ while (dom && cmd_ctx->check_next && dom->fqnames) {
+ dom = dom->next;
+ }
+
+ if (!dom) break;
+
+ /* make sure to update the dctx if we changed domain */
+ dctx->domain = dom;
+
+ DEBUG(SSSDBG_FUNC_DATA, ("Requesting info about [%s@%s]\n",
+ cmd_ctx->username, dom->name));
+
+ ret = sysdb_get_ctx_from_list(cli_ctx->rctx->db_list,
+ dctx->domain, &sysdb);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("sysdb context not found for this domain!\n"));
+ return EIO;
+ }
+
+ ret = sysdb_getpwnam(dctx, sysdb, cmd_ctx->username, &dctx->user);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ ("Failed to make request to our cache!\n"));
+ return EIO;
+ }
+
+ if (dctx->user->count > 1) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("getpwnam call returned more than one result !?!\n"));
+ return EIO;
+ }
+
+ if (dctx->user->count == 0 && !dctx->check_provider) {
+ /* if a multidomain search, try with next */
+ if (cmd_ctx->check_next) {
+ dctx->check_provider = true;
+ dom = dom->next;
+ if (dom) continue;
+ }
+
+ DEBUG(SSSDBG_MINOR_FAILURE, ("No results for getpwnam call\n"));
+ return ENOENT;
+ }
+
+ /* One result found, check cache expiry */
+ if (dctx->user->count == 1) {
+ cache_expire = ldb_msg_find_attr_as_uint64(dctx->user->msgs[0],
+ SYSDB_CACHE_EXPIRE, 0);
+ }
+
+ /* If cache miss and we haven't checked DP yet OR the entry is
+ * outdated, go to DP */
+ if ((dctx->user->count == 0 && dctx->check_provider) ||
+ cache_expire < time(NULL)) {
+ dpreq = sss_dp_get_account_send(cli_ctx, cli_ctx->rctx,
+ dom, false, SSS_DP_INITGROUPS,
+ cmd_ctx->username, 0);
+ if (!dpreq) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("Out of memory sending data provider request\n"));
+ return ENOMEM;
+ }
+
+ cb_ctx = talloc_zero(cli_ctx, struct dp_callback_ctx);
+ if(!cb_ctx) {
+ talloc_zfree(dpreq);
+ return ENOMEM;
+ }
+
+ cb_ctx->callback = sudosrv_check_user_dp_callback;
+ cb_ctx->ptr = dctx;
+ cb_ctx->cctx = cli_ctx;
+ cb_ctx->mem_ctx = cli_ctx;
+
+ tevent_req_set_callback(dpreq, sudosrv_dp_send_acct_req_done, cb_ctx);
+
+ /* tell caller we are in an async call */
+ return EAGAIN;
+ }
+
+ DEBUG(SSSDBG_TRACE_FUNC, ("Returning info for user [%s@%s]\n",
+ cmd_ctx->username, dctx->domain->name));
+ return EOK;
+ }
+
+ return ENOENT;
+}
+
+static void sudosrv_dp_send_acct_req_done(struct tevent_req *req)
+{
+ struct dp_callback_ctx *cb_ctx =
+ tevent_req_callback_data(req, struct dp_callback_ctx);
+
+ errno_t ret;
+ dbus_uint16_t err_maj;
+ dbus_uint32_t err_min;
+ char *err_msg;
+
+ ret = sss_dp_get_account_recv(cb_ctx->mem_ctx, req,
+ &err_maj, &err_min,
+ &err_msg);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("Fatal error, killing connection!\n"));
+ talloc_free(cb_ctx->cctx);
+ return;
+ }
+
+ cb_ctx->callback(err_maj, err_min, err_msg, cb_ctx->ptr);
+}
+
+static void sudosrv_check_user_dp_callback(uint16_t err_maj, uint32_t err_min,
+ const char *err_msg, void *ptr)
+{
+ errno_t ret;
+ struct sudo_dom_ctx *dctx = talloc_get_type(ptr, struct sudo_dom_ctx);
+
+ if (err_maj) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("Unable to get information from Data Provider\n"
+ "Error: %u, %u, %s\n",
+ (unsigned int)err_maj, (unsigned int)err_min, err_msg));
+ }
+
+ DEBUG(SSSDBG_TRACE_INTERNAL, ("Data Provider returned, check the cache again\n"));
+ dctx->check_provider = false;
+ ret = sudosrv_get_user(dctx);
+ /* FIXME - set entry into cache so that we don't perform initgroups too often */
+ if (ret == EAGAIN) {
+ goto done;
+ } else if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ ("Could not look up the user [%d]: %s\n",
+ ret, strerror(ret)));
+ sudosrv_cmd_done(dctx, EIO);
+ return;
+ }
+
+ DEBUG(SSSDBG_TRACE_INTERNAL, ("Looking up sudo rules..\n"));
+ ret = sudosrv_get_rules(dctx);
+ if (ret == EAGAIN) {
+ goto done;
+ } else if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ ("Error getting sudo rules [%d]: %s\n",
+ ret, strerror(ret)));
+ sudosrv_cmd_done(dctx, EIO);
+ return;
+ }
+
+done:
+ sudosrv_cmd_done(dctx, ret);
+}
+
+static errno_t sudosrv_get_sudorules_from_cache(struct sudo_dom_ctx *dctx);
+static void sudosrv_get_sudorules_dp_callback(struct tevent_req *req);
+
+static errno_t sudosrv_get_rules(struct sudo_dom_ctx *dctx)
+{
+ struct tevent_req *dpreq;
+ struct sudo_cmd_ctx *cmd_ctx = dctx->cmd_ctx;
+
+ /* FIXME - cache logic will be here. For now, just refresh
+ * the cache unconditionally */
+ dpreq = sudosrv_dp_refresh_send(cmd_ctx->cli_ctx->rctx,
+ dctx->domain, cmd_ctx->username);
+ if (dpreq == NULL) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("Fatal: Sysdb CTX not found for this domain!\n"));
+ return EIO;
+ }
+ tevent_req_set_callback(dpreq, sudosrv_get_sudorules_dp_callback, dctx);
+ return EAGAIN;
+}
+
+static void sudosrv_get_sudorules_dp_callback(struct tevent_req *req)
+{
+ struct sudo_dom_ctx *dctx;
+ errno_t ret;
+ dbus_uint16_t err_maj;
+ dbus_uint32_t err_min;
+
+ dctx = tevent_req_callback_data(req, struct sudo_dom_ctx);
+
+ ret = sudosrv_dp_refresh_recv(req, &err_maj, &err_min);
+ talloc_zfree(req);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ ("Data provider returned an error [%d]: %s "
+ "DBus error min: %d maj %d\n",
+ ret, strerror(ret), err_maj, err_min));
+ sudosrv_cmd_done(dctx, EIO);
+ return;
+ }
+
+ DEBUG(SSSDBG_TRACE_INTERNAL, ("About to get sudo rules from cache\n"));
+ ret = sudosrv_get_sudorules_from_cache(dctx);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ ("Failed to make a request to our cache [%d]: %s\n",
+ ret, strerror(ret)));
+ sudosrv_cmd_done(dctx, EIO);
+ return;
+ }
+
+ sudosrv_cmd_done(dctx, ret);
+}
+
+static errno_t sudosrv_get_sudorules_query_cache(TALLOC_CTX *mem_ctx,
+ struct sysdb_ctx *sysdb,
+ const char *username,
+ uid_t uid,
+ char **groupnames,
+ struct sysdb_attrs ***_rules,
+ size_t *_count);
+
+static errno_t sudosrv_get_sudorules_from_cache(struct sudo_dom_ctx *dctx)
+{
+ TALLOC_CTX *tmp_ctx;
+ errno_t ret;
+ struct sysdb_ctx *sysdb;
+ struct cli_ctx *cli_ctx = dctx->cmd_ctx->cli_ctx;
+ uid_t uid;
+ char **groupnames;
+
+ tmp_ctx = talloc_new(NULL);
+ if (tmp_ctx == NULL) return ENOMEM;
+
+ ret = sysdb_get_ctx_from_list(cli_ctx->rctx->db_list,
+ dctx->domain, &sysdb);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("sysdb context not found for this domain!\n"));
+ ret = EIO;
+ goto done;
+ }
+
+ ret = sysdb_get_sudo_user_info(tmp_ctx, dctx->cmd_ctx->username,
+ sysdb, &uid, &groupnames);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("Unable to retrieve user info [%d]: %s\n", strerror(ret)));
+ goto done;
+ }
+
+ ret = sudosrv_get_sudorules_query_cache(dctx, sysdb,
+ dctx->cmd_ctx->username,
+ uid, groupnames,
+ &dctx->res, &dctx->res_count);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("Unable to retrieve sudo rules [%d]: %s\n", strerror(ret)));
+ goto done;
+ }
+
+ DEBUG(SSSDBG_TRACE_FUNC, ("Returning rules for [%s@%s]\n",
+ dctx->cmd_ctx->username, dctx->domain->name));
+
+ ret = EOK;
+done:
+ talloc_free(tmp_ctx);
+ return ret;
+}
+
+static errno_t
+sort_sudo_rules(struct sysdb_attrs **rules, size_t count);
+
+static errno_t sudosrv_get_sudorules_query_cache(TALLOC_CTX *mem_ctx,
+ struct sysdb_ctx *sysdb,
+ const char *username,
+ uid_t uid,
+ char **groupnames,
+ struct sysdb_attrs ***_rules,
+ size_t *_count)
+{
+ TALLOC_CTX *tmp_ctx;
+ char *filter;
+ errno_t ret;
+ size_t count;
+ struct sysdb_attrs **rules;
+ struct ldb_message **msgs;
+ const char *attrs[] = { SYSDB_OBJECTCLASS
+ SYSDB_SUDO_CACHE_AT_OC,
+ SYSDB_SUDO_CACHE_AT_CN,
+ SYSDB_SUDO_CACHE_AT_USER,
+ SYSDB_SUDO_CACHE_AT_HOST,
+ SYSDB_SUDO_CACHE_AT_COMMAND,
+ SYSDB_SUDO_CACHE_AT_OPTION,
+ SYSDB_SUDO_CACHE_AT_RUNASUSER,
+ SYSDB_SUDO_CACHE_AT_RUNASGROUP,
+ SYSDB_SUDO_CACHE_AT_NOTBEFORE,
+ SYSDB_SUDO_CACHE_AT_NOTAFTER,
+ SYSDB_SUDO_CACHE_AT_ORDER,
+ NULL };
+
+ tmp_ctx = talloc_new(NULL);
+ if (tmp_ctx == NULL) return ENOMEM;
+ ret = sysdb_get_sudo_filter(tmp_ctx, username, uid, groupnames,
+ (SYSDB_SUDO_FILTER_NGRS | SYSDB_SUDO_FILTER_INCLUDE_ALL |
+ SYSDB_SUDO_FILTER_INCLUDE_DFL), &filter);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("Could not construct the search filter [%d]: %s\n",
+ ret, strerror(ret)));
+ goto done;
+ }
+
+ DEBUG(SSSDBG_FUNC_DATA, ("Searching sysdb with [%s]\n", filter));
+
+ ret = sysdb_search_custom(tmp_ctx, sysdb, filter,
+ SUDORULE_SUBDIR, attrs,
+ &count, &msgs);
+ if (ret != EOK && ret != ENOENT) {
+ DEBUG(SSSDBG_CRIT_FAILURE, ("Error looking up SUDO rules"));
+ goto done;
+ } if (ret == ENOENT) {
+ *_rules = NULL;
+ *_count = 0;
+ ret = EOK;
+ goto done;
+ }
+
+ ret = sysdb_msg2attrs(tmp_ctx, count, msgs, &rules);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ ("Could not convert ldb message to sysdb_attrs\n"));
+ goto done;
+ }
+
+ ret = sort_sudo_rules(rules, count);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ ("Could not sort rules by sudoOrder\n"));
+ goto done;
+ }
+
+ *_rules = talloc_steal(mem_ctx, rules);
+ *_count = count;
+
+ ret = EOK;
+done:
+ talloc_free(tmp_ctx);
+ return ret;
+}
+
+static int
+sudo_order_cmp_fn(const void *a, const void *b)
+{
+ struct sysdb_attrs *r1, *r2;
+ uint32_t o1, o2;
+ int ret;
+
+ r1 = * (struct sysdb_attrs * const *) a;
+ r2 = * (struct sysdb_attrs * const *) b;
+ if (!r1 || !r2) {
+ DEBUG(SSSDBG_CRIT_FAILURE, ("BUG: Wrong data?\n"));
+ return 0;
+ }
+
+ ret = sysdb_attrs_get_uint32_t(r1, SYSDB_SUDO_CACHE_AT_ORDER, &o1);
+ if (ret == ENOENT) {
+ /* man sudoers-ldap: If the sudoOrder attribute is not present,
+ * a value of 0 is assumed */
+ o1 = 0;
+ } else if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE, ("Cannot get sudoOrder value\n"));
+ return 0;
+ }
+
+ ret = sysdb_attrs_get_uint32_t(r2, SYSDB_SUDO_CACHE_AT_ORDER, &o2);
+ if (ret == ENOENT) {
+ /* man sudoers-ldap: If the sudoOrder attribute is not present,
+ * a value of 0 is assumed */
+ o2 = 0;
+ } else if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE, ("Cannot get sudoOrder value\n"));
+ return 0;
+ }
+
+ if (o1 > o2) {
+ return 1;
+ } else if (o1 < o2) {
+ return -1;
+ }
+
+ return 0;
+}
+
+static errno_t
+sort_sudo_rules(struct sysdb_attrs **rules, size_t count)
+{
+ qsort(rules, count, sizeof(struct sysdb_attrs *),
+ sudo_order_cmp_fn);
return EOK;
}