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/* This file is part of the Project Athena Zephyr Notification System.
* It contains source for the ZParseNotice 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>
Code_t ZParseNotice(buffer,len,notice,auth,from)
ZPacket_t buffer;
int len;
ZNotice_t *notice;
int *auth;
struct sockaddr_in *from;
{
char *ptr,*end,*cksum,srcprincipal[ANAME_SZ+INST_SZ+REALM_SZ+4];
int result;
unsigned int temp[3];
AUTH_DAT dat;
KTEXT_ST authent;
ZChecksum_t our_checksum;
CREDENTIALS cred;
ptr = buffer;
end = buffer+len;
if (ZReadAscii(ptr,end-ptr,(char *)temp,sizeof(int)) == ZERR_BADFIELD)
return (ZERR_BADPKT);
ptr += strlen(ptr)+1;
if (*temp != ZVERSION)
return (ZERR_VERS);
if (ZReadAscii(ptr,end-ptr,(char *)temp,sizeof(int)) == ZERR_BADFIELD)
return (ZERR_BADPKT);
notice->z_kind = (ZNotice_Kind_t)*temp;
ptr += strlen(ptr)+1;
if (ZReadAscii(ptr,end-ptr,(char *)temp,sizeof(ZUnique_Id_t)) ==
ZERR_BADFIELD)
return (ZERR_BADPKT);
bcopy((char *)temp,(char *)¬ice->z_uid,sizeof(ZUnique_Id_t));
ptr += strlen(ptr)+1;
if (ZReadAscii(ptr,end-ptr,(char *)temp,sizeof(u_short)) ==
ZERR_BADFIELD)
return (ZERR_BADPKT);
notice->z_port = (u_short)*temp;
ptr += strlen(ptr)+1;
if (ZReadAscii(ptr,end-ptr,(char *)temp,sizeof(int)) == ZERR_BADFIELD)
return (ZERR_BADPKT);
notice->z_auth = *temp;
ptr += strlen(ptr)+1;
if (ZReadAscii(ptr,end-ptr,(char *)temp,sizeof(int)) == ZERR_BADFIELD)
return (ZERR_BADPKT);
notice->z_authent_len = *temp;
ptr += strlen(ptr)+1;
notice->z_ascii_authent = ptr;
ptr += strlen(ptr)+1;
notice->z_class = ptr;
ptr += strlen(ptr)+1;
notice->z_class_inst = ptr;
ptr += strlen(ptr)+1;
notice->z_opcode = ptr;
ptr += strlen(ptr)+1;
notice->z_sender = ptr;
ptr += strlen(ptr)+1;
notice->z_recipient = ptr;
ptr += strlen(ptr)+1;
cksum = ptr;
if (ZReadAscii(ptr,end-ptr,(char *)¬ice->z_checksum,
sizeof(ZChecksum_t))
== ZERR_BADFIELD)
return (ZERR_BADPKT);
ptr += strlen(ptr)+1;
notice->z_message = (caddr_t) ptr;
notice->z_message_len = len-(ptr-buffer);
if (!auth)
return (ZERR_NONE);
if (!notice->z_auth) {
*auth = 0;
return (ZERR_NONE);
}
if (__Zephyr_server) {
if (ZReadAscii(notice->z_ascii_authent,
strlen(notice->z_ascii_authent)+1,
(char *)authent.dat,
notice->z_authent_len) == ZERR_BADFIELD) {
*auth = 0;
return (ZERR_NONE);
}
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));
*auth = (result == RD_AP_OK);
(void) sprintf(srcprincipal,"%s%s%s@%s",dat.pname,
dat.pinst[0]?".":"",dat.pinst,dat.prealm);
if (strcmp(srcprincipal,notice->z_sender))
*auth = 0;
return (ZERR_NONE);
}
if (result = get_credentials(SERVER_SERVICE,SERVER_INSTANCE,
__Zephyr_realm,&cred))
return (result+krb_err_base);
our_checksum = (ZChecksum_t)quad_cksum(buffer,NULL,cksum-buffer,0,
cred.session);
*auth = (our_checksum == notice->z_checksum);
return (ZERR_NONE);
}
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