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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 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 "libcli/util/asn_1.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;
if (!data || !ticket->data) {
return data_blob(NULL,0);
}
data = asn1_init(mem_ctx);
if (data == NULL) {
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;
}
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