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115 lines
2.7 KiB
C
115 lines
2.7 KiB
C
/*
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Unix SMB/CIFS implementation.
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simple GSSAPI wrappers
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Copyright (C) Andrew Tridgell 2001
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Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002
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Copyright (C) Luke Howard 2003
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#include "libcli/util/asn_1.h"
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#include "auth/gensec/gensec.h"
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/*
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generate a krb5 GSS-API wrapper packet given a ticket
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*/
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DATA_BLOB gensec_gssapi_gen_krb5_wrap(TALLOC_CTX *mem_ctx, const DATA_BLOB *ticket, const uint8_t tok_id[2])
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{
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struct asn1_data data;
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DATA_BLOB ret = data_blob(NULL,0);
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if (!ticket->data) {
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return ret;
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}
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ZERO_STRUCT(data);
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asn1_push_tag(&data, ASN1_APPLICATION(0));
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asn1_write_OID(&data, GENSEC_OID_KERBEROS5);
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asn1_write(&data, tok_id, 2);
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asn1_write(&data, ticket->data, ticket->length);
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asn1_pop_tag(&data);
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if (data.has_error) {
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DEBUG(1,("Failed to build krb5 wrapper at offset %d\n", (int)data.ofs));
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asn1_free(&data);
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}
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ret = data_blob_talloc(mem_ctx, data.data, data.length);
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asn1_free(&data);
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return ret;
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}
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/*
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parse a krb5 GSS-API wrapper packet giving a ticket
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*/
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BOOL gensec_gssapi_parse_krb5_wrap(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob, DATA_BLOB *ticket, uint8_t tok_id[2])
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{
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BOOL ret;
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struct asn1_data data;
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int data_remaining;
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asn1_load(&data, *blob);
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asn1_start_tag(&data, ASN1_APPLICATION(0));
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asn1_check_OID(&data, GENSEC_OID_KERBEROS5);
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data_remaining = asn1_tag_remaining(&data);
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if (data_remaining < 3) {
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data.has_error = True;
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} else {
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asn1_read(&data, tok_id, 2);
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data_remaining -= 2;
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*ticket = data_blob_talloc(mem_ctx, NULL, data_remaining);
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asn1_read(&data, ticket->data, ticket->length);
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}
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asn1_end_tag(&data);
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ret = !data.has_error;
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asn1_free(&data);
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return ret;
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}
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/*
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check a GSS-API wrapper packet givin an expected OID
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*/
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BOOL gensec_gssapi_check_oid(const DATA_BLOB *blob, const char *oid)
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{
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BOOL ret;
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struct asn1_data data;
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asn1_load(&data, *blob);
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asn1_start_tag(&data, ASN1_APPLICATION(0));
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asn1_check_OID(&data, GENSEC_OID_KERBEROS5);
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ret = !data.has_error;
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asn1_free(&data);
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return ret;
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}
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