Always start PAC responder if IPA ID provider is configured

Since the PAC responder is used during the authentication of users from
trusted realms it is started automatically if the IPA ID provider is
configured for a domain to simplify the configuration.

Fixes https://fedorahosted.org/sssd/ticket/1613

1 files changed, 72 insertions, 0 deletions

diff --git a/src/monitor/monitor.c b/src/monitor/monitor.c
index 956efb13..caa15713 100644
--- a/src/monitor/monitor.c
+++ b/src/monitor/monitor.c
@@ -804,6 +804,71 @@ static int check_local_domain_unique(struct sss_domain_info *domains)
     return EOK;
 }
 
+static errno_t add_implicit_services(struct confdb_ctx *cdb, TALLOC_CTX *mem_ctx,
+                                     char ***_services)
+{
+    int ret;
+    char **domain_names;
+    TALLOC_CTX *tmp_ctx;
+    size_t c;
+    char *conf_path;
+    char *id_provider;
+    bool add_pac = false;
+
+    tmp_ctx = talloc_new(NULL);
+    if (tmp_ctx == NULL) {
+        DEBUG(SSSDBG_OP_FAILURE, ("talloc_new failed.\n"));
+        return ENOMEM;
+    }
+
+    ret = confdb_get_string_as_list(cdb, tmp_ctx,
+                                    CONFDB_MONITOR_CONF_ENTRY,
+                                    CONFDB_MONITOR_ACTIVE_DOMAINS,
+                                    &domain_names);
+    if (ret == ENOENT) {
+        DEBUG(SSSDBG_OP_FAILURE, ("No domains configured!\n"));
+        goto done;
+    }
+
+    for (c = 0; domain_names[c] != NULL; c++) {
+        conf_path = talloc_asprintf(tmp_ctx, CONFDB_DOMAIN_PATH_TMPL,
+                                    domain_names[c]);
+        if (conf_path == NULL) {
+            DEBUG(SSSDBG_OP_FAILURE, ("talloc_asprintf failed.\n"));
+            ret = ENOMEM;
+            goto done;
+        }
+
+        ret = confdb_get_string(cdb, tmp_ctx, conf_path,
+                                CONFDB_DOMAIN_ID_PROVIDER, NULL, &id_provider);
+        if (ret == EOK) {
+            if (strcasecmp(id_provider, "IPA") == 0) {
+                add_pac = true;
+            }
+        } else {
+            DEBUG(SSSDBG_OP_FAILURE, ("Failed to get id_provider for " \
+                                      "domain [%s], trying next domain.\n",
+                                      domain_names[c]));
+        }
+    }
+
+    if (BUILD_WITH_PAC_RESPONDER && add_pac &&
+        !string_in_list("pac", *_services, false)) {
+        ret = add_string_to_list(mem_ctx, "pac", _services);
+        if (ret != EOK) {
+            DEBUG(SSSDBG_OP_FAILURE, ("add_string_to_list failed.\n"));
+            goto done;
+        }
+    }
+
+    ret = EOK;
+
+done:
+    talloc_free(tmp_ctx);
+
+    return ret;
+}
+
 static char *check_services(char **services)
 {
     const char *known_services[] = { "nss", "pam", "sudo", "autofs", "ssh",
@@ -857,6 +922,13 @@ int get_monitor_config(struct mt_ctx *ctx)
         return EINVAL;
     }
 
+    ret = add_implicit_services(ctx->cdb, ctx->service_ctx, &ctx->services);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_OP_FAILURE, ("Failed to add implicit configured " \
+                                  "services. Some functionality might " \
+                                  "be missing"));
+    }
+
     badsrv = check_services(ctx->services);
     if (badsrv != NULL) {
         DEBUG(0, ("Invalid service %s\n", badsrv));