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/*
* Copyright 1993 by OpenVision Technologies, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appears in all copies and
* that both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of OpenVision not be used
* in advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. OpenVision makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "gssapiP_krb5.h"
#include <memory.h>
krb5_error_code
kg_checksum_channel_bindings(cb, cksum, bigend)
gss_channel_bindings_t cb;
krb5_checksum *cksum;
int bigend;
{
int len;
char *buf, *ptr;
krb5_error_code code;
if (!kg_context && (code=kg_get_context()))
return code;
/* generate a buffer full of zeros if no cb specified */
if (cb == GSS_C_NO_CHANNEL_BINDINGS) {
/* allocate the cksum contents buffer */
if ((cksum->contents = (krb5_octet *)
xmalloc(krb5_checksum_size(context, CKSUMTYPE_RSA_MD5))) == NULL)
return(ENOMEM);
cksum->checksum_type = CKSUMTYPE_RSA_MD5;
memset(cksum->contents, '\0',
(cksum->length = krb5_checksum_size(kg_context, CKSUMTYPE_RSA_MD5)));
return(0);
}
/* create the buffer to checksum into */
len = (sizeof(krb5_int32)*5+
cb->initiator_address.length+
cb->acceptor_address.length+
cb->application_data.length);
if ((buf = (char *) xmalloc(len)) == NULL)
return(ENOMEM);
/* allocate the cksum contents buffer */
cksum->length = krb5_checksum_size(context, CKSUMTYPE_RSA_MD5);
if ((cksum->contents = (krb5_octet *) xmalloc(cksum->length)) == NULL) {
free(buf);
return(ENOMEM);
}
/* helper macros. This code currently depends on a long being 32
bits, and htonl dtrt. */
ptr = buf;
TWRITE_INT(ptr, cb->initiator_addrtype, bigend);
TWRITE_BUF(ptr, cb->initiator_address, bigend);
TWRITE_INT(ptr, cb->acceptor_addrtype, bigend);
TWRITE_BUF(ptr, cb->acceptor_address, bigend);
TWRITE_BUF(ptr, cb->application_data, bigend);
/* checksum the data */
if (code = krb5_calculate_checksum(kg_context, CKSUMTYPE_RSA_MD5,
buf, len, NULL, 0, cksum)) {
xfree(cksum->contents);
xfree(buf);
return(code);
}
/* success */
xfree(buf);
return(0);
}
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