r1457: Add the GSSAPI layer to our gensec_krb5 code.

Andrew Bartlett
(This used to be commit 893a9a3865d7046d8b1cb0418aaf48b88beefa05)

1 files changed, 88 insertions, 0 deletions

diff --git a/source4/libcli/auth/gssapi_parse.c b/source4/libcli/auth/gssapi_parse.c
new file mode 100644
index 0000000000..4a80e1d799
--- /dev/null
+++ b/source4/libcli/auth/gssapi_parse.c
@@ -0,0 +1,88 @@
+/* 
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.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 tok_id[2])
+{
+	ASN1_DATA data;
+	DATA_BLOB ret;
+
+	ZERO_STRUCT(data);
+
+	asn1_push_tag(&data, ASN1_APPLICATION(0));
+	asn1_write_OID(&data, 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);
+	}
+
+	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 tok_id[2])
+{
+	BOOL ret;
+	ASN1_DATA data;
+	int data_remaining;
+
+	asn1_load(&data, *blob);
+	asn1_start_tag(&data, ASN1_APPLICATION(0));
+	asn1_check_OID(&data, 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;
+}
+
+