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/* This file is part of the Project Athena Zephyr Notification System.
* It contains source for the ZCheckAuthentication function.
*
* Created by: Robert French
*
* $Source$
* $Author$
*
* Copyright (c) 1987 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
/* $Header$ */
#include <zephyr/mit-copyright.h>
#include <zephyr/zephyr_internal.h>
int ZCheckAuthentication(notice,buffer,from)
ZNotice_t *notice;
ZPacket_t buffer;
struct sockaddr_in *from;
{
int result;
char srcprincipal[ANAME_SZ+INST_SZ+REALM_SZ+4];
KTEXT_ST authent;
AUTH_DAT dat;
ZChecksum_t our_checksum;
CREDENTIALS cred;
if (!notice->z_auth)
return (0);
if (__Zephyr_server) {
if (ZReadAscii(notice->z_ascii_authent,
strlen(notice->z_ascii_authent)+1,
(char *)authent.dat,
notice->z_authent_len) == ZERR_BADFIELD) {
return (0);
}
authent.length = notice->z_authent_len;
result = rd_ap_req(&authent,SERVER_SERVICE,
SERVER_INSTANCE,from->sin_addr.s_addr,
&dat,SERVER_SRVTAB);
bcopy((char *)dat.session,(char *)__Zephyr_session,
sizeof(C_Block));
(void) sprintf(srcprincipal,"%s%s%s@%s",dat.pname,
dat.pinst[0]?".":"",dat.pinst,dat.prealm);
if (strcmp(srcprincipal,notice->z_sender))
return (0);
return (result == RD_AP_OK);
}
if (result = get_credentials(SERVER_SERVICE,SERVER_INSTANCE,
__Zephyr_realm,&cred))
return (result+krb_err_base);
our_checksum = (ZChecksum_t)quad_cksum(buffer,NULL,
notice->z_recipient+
strlen(notice->z_recipient)+1-
buffer,0,cred.session);
return (our_checksum == notice->z_checksum);
}
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