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/*
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"
#include "asn_1.h"
#include "system/kerberos.h"
#include "auth/gensec/gensec.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_blob(NULL,0);
if (!ticket->data) {
return ret;
}
ZERO_STRUCT(data);
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);
}
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;
int data_remaining;
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_load(&data, *blob);
asn1_start_tag(&data, ASN1_APPLICATION(0));
asn1_check_OID(&data, GENSEC_OID_KERBEROS5);
ret = !data.has_error;
asn1_free(&data);
return ret;
}
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