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-rw-r--r--auth/kerberos/gssapi_parse.c119
-rw-r--r--auth/kerberos/wscript_build4
2 files changed, 121 insertions, 2 deletions
diff --git a/auth/kerberos/gssapi_parse.c b/auth/kerberos/gssapi_parse.c
new file mode 100644
index 0000000000..6e9eddced6
--- /dev/null
+++ b/auth/kerberos/gssapi_parse.c
@@ -0,0 +1,119 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ simple GSSAPI wrappers
+
+ Copyright (C) Andrew Tridgell 2001
+ Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002
+ Copyright (C) Luke Howard 2003
+
+ 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 "includes.h"
+#include "../lib/util/asn1.h"
+#include "auth/gensec/gensec.h"
+#include "system/kerberos.h"
+#include "auth/kerberos/kerberos.h"
+
+/*
+ generate a krb5 GSS-API wrapper packet given a ticket
+*/
+DATA_BLOB gensec_gssapi_gen_krb5_wrap(TALLOC_CTX *mem_ctx, const DATA_BLOB *ticket, const uint8_t tok_id[2])
+{
+ struct asn1_data *data;
+ DATA_BLOB ret;
+
+ data = asn1_init(mem_ctx);
+ if (!data || !ticket->data) {
+ return data_blob(NULL,0);
+ }
+
+ asn1_push_tag(data, ASN1_APPLICATION(0));
+ asn1_write_OID(data, GENSEC_OID_KERBEROS5);
+
+ asn1_write(data, tok_id, 2);
+ asn1_write(data, ticket->data, ticket->length);
+ asn1_pop_tag(data);
+
+ if (data->has_error) {
+ DEBUG(1,("Failed to build krb5 wrapper at offset %d\n", (int)data->ofs));
+ asn1_free(data);
+ return data_blob(NULL,0);
+ }
+
+ ret = data_blob_talloc(mem_ctx, data->data, data->length);
+ asn1_free(data);
+
+ return ret;
+}
+
+/*
+ parse a krb5 GSS-API wrapper packet giving a ticket
+*/
+bool gensec_gssapi_parse_krb5_wrap(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob, DATA_BLOB *ticket, uint8_t tok_id[2])
+{
+ bool ret;
+ struct asn1_data *data = asn1_init(mem_ctx);
+ int data_remaining;
+
+ if (!data) {
+ return false;
+ }
+
+ asn1_load(data, *blob);
+ asn1_start_tag(data, ASN1_APPLICATION(0));
+ asn1_check_OID(data, GENSEC_OID_KERBEROS5);
+
+ data_remaining = asn1_tag_remaining(data);
+
+ if (data_remaining < 3) {
+ data->has_error = true;
+ } else {
+ asn1_read(data, tok_id, 2);
+ data_remaining -= 2;
+ *ticket = data_blob_talloc(mem_ctx, NULL, data_remaining);
+ asn1_read(data, ticket->data, ticket->length);
+ }
+
+ asn1_end_tag(data);
+
+ ret = !data->has_error;
+
+ asn1_free(data);
+
+ return ret;
+}
+
+
+/*
+ check a GSS-API wrapper packet givin an expected OID
+*/
+bool gensec_gssapi_check_oid(const DATA_BLOB *blob, const char *oid)
+{
+ bool ret;
+ struct asn1_data *data = asn1_init(NULL);
+
+ if (!data) return false;
+
+ asn1_load(data, *blob);
+ asn1_start_tag(data, ASN1_APPLICATION(0));
+ asn1_check_OID(data, oid);
+
+ ret = !data->has_error;
+
+ asn1_free(data);
+
+ return ret;
+}
diff --git a/auth/kerberos/wscript_build b/auth/kerberos/wscript_build
index 2421b1654f..fe38b76c0c 100644
--- a/auth/kerberos/wscript_build
+++ b/auth/kerberos/wscript_build
@@ -1,3 +1,3 @@
bld.SAMBA_SUBSYSTEM('KRB5_PAC',
- source='gssapi_pac.c kerberos_pac.c',
- deps='gssapi_krb5 krb5 ndr-krb5pac com_err')
+ source='gssapi_pac.c kerberos_pac.c gssapi_parse.c',
+ deps='gssapi_krb5 krb5 ndr-krb5pac com_err asn1util')