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-rw-r--r--src/providers/ldap/ldap_common.c58
1 files changed, 55 insertions, 3 deletions
diff --git a/src/providers/ldap/ldap_common.c b/src/providers/ldap/ldap_common.c
index 13ba9de69..1735e8c70 100644
--- a/src/providers/ldap/ldap_common.c
+++ b/src/providers/ldap/ldap_common.c
@@ -725,6 +725,40 @@ done:
return ret;
}
+static const char *
+sdap_gssapi_get_default_realm(TALLOC_CTX *mem_ctx)
+{
+ char *krb5_realm = NULL;
+ const char *realm;
+ krb5_error_code krberr;
+ krb5_context context = NULL;
+
+ krberr = krb5_init_context(&context);
+ if (krberr) {
+ DEBUG(2, ("Failed to init kerberos context\n"));
+ goto done;
+ }
+
+ krberr = krb5_get_default_realm(context, &krb5_realm);
+ if (krberr) {
+ DEBUG(2, ("Failed to get default realm name: %s\n",
+ sss_krb5_get_error_message(context, krberr)));
+ goto done;
+ }
+
+ realm = talloc_strdup(mem_ctx, krb5_realm);
+ krb5_free_default_realm(context, krb5_realm);
+ if (!realm) {
+ DEBUG(0, ("Out of memory\n"));
+ goto done;
+ }
+
+ DEBUG(7, ("Will use default realm %s\n", realm));
+done:
+ if (context) krb5_free_context(context);
+ return realm;
+}
+
int sdap_gssapi_init(TALLOC_CTX *mem_ctx,
struct dp_option *opts,
struct be_ctx *bectx,
@@ -734,16 +768,33 @@ int sdap_gssapi_init(TALLOC_CTX *mem_ctx,
int ret;
const char *krb5_servers;
const char *krb5_realm;
+ const char *krb5_opt_realm;
struct krb5_service *service = NULL;
+ TALLOC_CTX *tmp_ctx;
+
+ tmp_ctx = talloc_new(NULL);
+ if (tmp_ctx == NULL) return ENOMEM;
krb5_servers = dp_opt_get_string(opts, SDAP_KRB5_KDC);
if (krb5_servers == NULL) {
DEBUG(1, ("Missing krb5_server option, using service discovery!\n"));
}
- krb5_realm = dp_opt_get_string(opts, SDAP_KRB5_REALM);
- if (krb5_realm == NULL) {
- DEBUG(0, ("Missing krb5_realm option, will use libkrb default\n"));
+ krb5_opt_realm = dp_opt_get_string(opts, SDAP_KRB5_REALM);
+ if (krb5_opt_realm == NULL) {
+ DEBUG(2, ("Missing krb5_realm option, will use libkrb default\n"));
+ krb5_realm = sdap_gssapi_get_default_realm(tmp_ctx);
+ if (krb5_realm == NULL) {
+ DEBUG(0, ("Cannot determine the Kerberos realm, aborting\n"));
+ ret = EIO;
+ goto done;
+ }
+ } else {
+ krb5_realm = talloc_strdup(tmp_ctx, krb5_opt_realm);
+ if (krb5_realm == NULL) {
+ ret = ENOMEM;
+ goto done;
+ }
}
ret = krb5_service_init(mem_ctx, bectx, SSS_KRB5KDC_FO_SRV, krb5_servers,
@@ -776,6 +827,7 @@ int sdap_gssapi_init(TALLOC_CTX *mem_ctx,
ret = EOK;
*krb5_service = service;
done:
+ talloc_free(tmp_ctx);
if (ret != EOK) talloc_free(service);
return ret;
}