[moira.git] / reg_svr / admin_call.c

/*
 *	$Source$
 *	$Author$
 *	$Header$
 *
 *	Copyright (C) 1987 by the Massachusetts Institute of Technology
 *
 *	Utility functions for communication with the Kerberos admin_server
 *
 * 	Original version written by Jeffery I. Schiller, January 1987
 *	Completely gutted and rewritten by Bill Sommerfeld, August 1987
 *
 *	$Log$
 *	Revision 1.4  1987-09-09 14:59:06  wesommer
 *	Allocate a new socket each time rather than keeping one around, 
 *	due to protocol problems.
 *
 * Revision 1.3  87/09/04  22:30:34  wesommer
 * Un-crock the KDC host (oops -- this one got distributed!!).
 * 
 * Revision 1.2  87/08/22  17:13:59  wesommer
 * Make admin_errmsg external rather than static.
 * Crock up KDC host.
 * 
 * Revision 1.1  87/08/07  13:50:37  wesommer
 * Initial revision
 * 
 */

#ifndef lint
static char *rcsid_admin_call_c = "$Header$";
#endif lint

#include <sys/errno.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>

#include <netdb.h>
#include <strings.h>
#include <stdio.h>

#include "admin_err.h"
#include "admin_server.h"
#include "prot.h"
#include "krb.h"

extern int krb_err_base;	/* Offset between com_err and kerberos codes */
extern int errno;		/* System call error numbers */

extern long gethostid();

static u_char *strapp();		/* string append function */

static int inited = 0;		/* are we initialized? */
static int admin_fd = -1;	/* socket to talk to admin_server. */

static struct sockaddr_in admin_addr; /* address of admin server. */
static struct sockaddr_in my_addr;    /* address bound to admin_fd. */
static int my_addr_len;		/* size of above address. */

static char krbrlm[REALM_SZ];	/* Local kerberos realm */
char admin_errmsg[BUFSIZ]; /* Server error message */

/*
 * Initialize socket, etc. to use to talk to admin_server.
 */

int admin_call_init()
{
    register int status = 0;
    
    if (!inited) {
	struct hostent *hp;	/* host to talk to */
	struct servent *sp;	/* service to talk to */

	init_kadm_err_tbl();
	if (status = get_krbrlm(krbrlm, 1)) {
	    status += krb_err_base;
	    goto punt;
	}

	/*
	 * Locate server.
	 */

	hp = gethostbyname(KERB_HOST);
	if (!hp) {
	    status = ADMIN_UNKNOWN_HOST;
	    goto punt;
	}
	sp = getservbyname("atest3", "udp");
	if (!sp) {
	    status = ADMIN_UNKNOWN_SERVICE;
	    goto punt;
	}
	bzero((char *)&admin_addr, sizeof(admin_addr));
	admin_addr.sin_family = hp->h_addrtype;
	bcopy((char *)hp->h_addr, (char *)&admin_addr.sin_addr, hp->h_length);
	admin_addr.sin_port = sp->s_port;

	inited = 1;
    }
    return 0;
    
punt:
    (void) close(admin_fd);
    admin_fd = -1;
    return status;
}

/*
 * Build and transmit request to admin_server, and wait for
 * response from server.  Returns a standard error code.
 */

int
admin_call(opcode, pname, old_passwd, new_passwd, crypt_passwd)
    int opcode;
    char *pname;
    char *old_passwd;
    char *new_passwd;
    char *crypt_passwd;
{
    int status;
    register u_char *bp;	/* Pointer into buffer. */
    u_char *ep;			/* End of buffer pointer. */
    
    u_char pvt_buf[BUFSIZ];	/* private message plaintext */
    int pvt_len;		/* length of valid data in pvt_buf */

    u_char sealed_buf[BUFSIZ];	/* sealed version of private message */
    int sealed_len;		/* length of valid data in sealed_buf */
    
    u_long checksum;		/* quad_cksum of sealed request. */
    
    C_Block sess_key;		/* Session key. */
    Key_schedule sess_sched;	/* Key schedule for above. */
    
    CREDENTIALS cred;		/* Kerberos credentials. */
    KTEXT_ST authent;		/* Authenticator */
    KTEXT_ST reply;		/* Reply from admin_server */
    MSG_DAT msg_data;		/* Decrypted message */
    int attempts;		/* Number of retransmits so far */

    struct sockaddr rec_addr;	/* Address we got reply from */
    int rec_addr_len;		/* Length of that address */
    int on = 1;			/* ioctl argument */
	
    
    if (!inited) {
	status = admin_call_init();
	if (status) goto bad;
    }

    /*
     * assemble packet:
     *
     * sealed message consists of:
     * version number (one byte).
     * request code (one byte).
     * principal name (null terminated).
     * new password (in the clear, null terminated).
     * old password or instance (null terminated)
     * crypt(new password, seed) (null terminated).
     * an extra null.
     * a '\001' character.
     * This is all sealed inside a private_message, with an
     * authenticator tacked on in front.
     */

    bp = pvt_buf;
    ep = pvt_buf + sizeof(pvt_buf);
    
    *bp++ = PW_SRV_VERSION;
    *bp++ = opcode;
    if ((bp = strapp(bp, (u_char *)pname, ep)) &&
	(bp = strapp(bp, (u_char *)new_passwd, ep)) &&
	(bp = strapp(bp, (u_char *)old_passwd, ep)) &&
	(bp = strapp(bp, (u_char *)crypt_passwd, ep))) {
	*bp++ = '\0';
	*bp++ = '\1';
	pvt_len = bp - pvt_buf;
    } else {
	status = ADMIN_TOO_LONG;
	goto bad;
    }
    
    /*
     * find our session key.
     */

    if (status = get_credentials("changepw", "kerberos", krbrlm, &cred)) {
	status += krb_err_base;
	goto bad;
    }

    bcopy((char *)cred.session, (char *)sess_key, sizeof(sess_key));
    bzero((char *)cred.session, sizeof(sess_key)); /* lest we remember */

    if(key_sched(sess_key, sess_sched)) {
	status = ADMIN_BAD_KEY;
	goto bad;
    }

    /*
     * Set up socket.
     */

    admin_fd = socket(admin_addr.sin_family, SOCK_DGRAM, 0);
    if (admin_fd < 0) {
	status = errno;
	goto bad;
    }

    bzero((char *)&my_addr, sizeof(my_addr));
    
    my_addr.sin_family = admin_addr.sin_family;
    my_addr.sin_addr.s_addr = gethostid();

    if (bind(admin_fd, &my_addr, sizeof(my_addr)) < 0) {
	status = errno;
	goto bad;
    }

    my_addr_len = sizeof(my_addr);

    if (getsockname(admin_fd, (struct sockaddr *)&my_addr,
		    &my_addr_len) < 0) {
	status = errno;
	goto bad;
    }

    if (ioctl(admin_fd, FIONBIO, (char *)&on) < 0) {
	status = errno;
	goto bad;
    }
	
    /*
     * Encrypt the message using the session key.
     * Since this contains passwords, it must be kept from prying eyes.
     */

    sealed_len = mk_private_msg(pvt_buf, sealed_buf, pvt_len,
				    sess_sched, sess_key, &my_addr,
				    &admin_addr);
    if (sealed_len < 0) {
	status = ADMIN_CANT_ENCRYPT;
	goto bad;
    }

    /*
     * Checksum the cypher text, to guard against tampering in flight.
     */

    checksum = quad_cksum(sealed_buf, NULL, sealed_len, 0, sess_key);
    
    /*
     * Make an authenticator, so the server can learn the session key
     * and know who we are.
     */

    if (status = mk_ap_req(&authent, "changepw", "kerberos", krbrlm,
			   checksum)) {
	status += krb_err_base;
	goto bad;
    }

    /*
     * Add the sealed message to the end of the authenticator.
     */

    if ((authent.length + sealed_len) > MAX_KTXT_LEN) {
	status = ADMIN_TOO_LONG;
	goto bad;
    }

    bcopy(sealed_buf, authent.dat + authent.length, sealed_len);
    authent.length += sealed_len;

    /*
     * send it off, and wait for a reply.
     */

    attempts = 0;
    
    while (attempts++ < RETRY_LIMIT) {
	int active;		/* number of active fds (from select). */
	fd_set set;		/* interesting fd's. */
	struct timeval timeout;	/* timeout on select. */
	
	if (sendto(admin_fd, (char *)authent.dat, authent.length,
		   0, &admin_addr, sizeof(admin_addr)) != authent.length) {
	    status = errno;
	    goto bad;
	}

	FD_ZERO(&set);
	FD_SET(admin_fd, &set);

	timeout.tv_sec = USER_TIMEOUT;
	timeout.tv_usec = 0;
	    
	active = select(admin_fd+1, &set, (fd_set *)0, (fd_set *)0, &timeout);
	if (active < 0) {
	    status = errno;
	    goto bad;
	} else if (active == 0) continue;
	else {
	    reply.length = recvfrom(admin_fd, (char *)reply.dat,
				    sizeof(reply.dat), 0,
				    &rec_addr, &rec_addr_len);
	    if (reply.length < 0) continue;
#ifdef notdef
	    if (!bcmp(&rec_addr, &admin_addr, sizeof(admin_addr)))
		/* the spoofers are out in force.. */
		continue;
#endif notdef
	    break;		/* got one.. */
	}
    }

    if (attempts > RETRY_LIMIT) {
	status = ETIMEDOUT;
	goto bad;
    }

    if (pkt_version((&reply)) != KRB_PROT_VERSION) {
	status = ADMIN_BAD_VERSION;
	goto bad;
    }

    if ((pkt_msg_type((&reply)) & ~1) != AUTH_MSG_PRIVATE) {
	bp = reply.dat;
	if (*bp++ != KRB_PROT_VERSION) {
	    status = ADMIN_BAD_VERSION;
	    goto bad;
	}
	if (*bp++ != AUTH_MSG_ERR_REPLY) {
	    status = ADMIN_UNKNOWN_CODE;
	    goto bad;
	}
	bp += strlen((char *)bp) + 1;	/* Skip name */
	bp += strlen((char *)bp) + 1;	/* Skip instance */
	bp += strlen((char *)bp) + 1;	/* Skip realm */

	/* null-terminate error string */
	reply.dat[reply.length] = '\0'; 

	if (*bp++ == 126) {
	    status = ADMIN_SERVER_ERROR;
	    strcpy(admin_errmsg, bp);
	    goto bad;
	} else {
	    status = ADMIN_UNKNOWN_CODE;
	    goto bad;
	}
    }
    status = rd_private_msg(reply.dat, reply.length,
			    sess_sched, sess_key,
			    &admin_addr, &my_addr,
			    &msg_data);
    if (status) {
	status += krb_err_base;
	goto bad;
    }
    bp = msg_data.app_data;

    if (*bp++ != PW_SRV_VERSION) {
	status = ADMIN_BAD_VERSION;
	goto bad;
    }
    if (*bp++ != INSTALL_REPLY) {
	status = ADMIN_UNKNOWN_CODE;
	goto bad;
    }

    status = 0;
    /* fall through into cleanup */

bad:
    /*
     * Paranoia: shred all the incriminating evidence.
     * We'll let the caller shred the arguments.
     */
    bzero((char *)sess_key, sizeof(sess_key));
    bzero((char *)sess_sched, sizeof(sess_sched));
    bzero(pvt_buf, sizeof(pvt_buf));
        
    if (admin_fd >= 0) {
	(void) close(admin_fd);
	admin_fd = -1;
    }

    return status;
}

/*
 * Copies characters from source to dest, returning a pointer to the
 * point in dest after the last character copied from source.
 * If this would be greater than end, no characters are copied, and NULL
 * is returned instead.
 */

static u_char *strapp(dest, source, end)
    register u_char *dest, *source, *end;
{
    register int length = strlen(source) + 1;
    if (dest+length > end) return NULL;
    else {
	bcopy(source, dest, length);
	return dest + length;
    }
}

/*
 * Local Variables:
 * mode: c
 * c-indent-level: 4
 * c-continued-statement-offset: 4
 * c-brace-offset: -4
 * c-argdecl-indent: 4
 * c-label-offset: -4
 * End:
 */
Commit	Line	Data
718bc25c	1	/*
	2	* $Source$
	3	* $Author$
	4	* $Header$
	5	*
	6	* Copyright (C) 1987 by the Massachusetts Institute of Technology
	7	*
	8	* Utility functions for communication with the Kerberos admin_server
	9	*
	10	* Original version written by Jeffery I. Schiller, January 1987
	11	* Completely gutted and rewritten by Bill Sommerfeld, August 1987
	12	*
	13	* $Log$
3004ebdb	14	* Revision 1.4 1987-09-09 14:59:06 wesommer
	15	* Allocate a new socket each time rather than keeping one around,
	16	* due to protocol problems.
718bc25c	17	*
3004ebdb	18	* Revision 1.3 87/09/04 22:30:34 wesommer
	19	* Un-crock the KDC host (oops -- this one got distributed!!).
	20	*
56d50401	21	* Revision 1.2 87/08/22 17:13:59 wesommer
	22	* Make admin_errmsg external rather than static.
	23	* Crock up KDC host.
	24	*
074685e3	25	* Revision 1.1 87/08/07 13:50:37 wesommer
	26	* Initial revision
	27	*
718bc25c	28	*/
	29
	30	#ifndef lint
	31	static char *rcsid_admin_call_c = "$Header$";
	32	#endif lint
	33
	34	#include <sys/errno.h>
	35	#include <sys/types.h>
	36	#include <sys/time.h>
	37	#include <sys/ioctl.h>
	38	#include <sys/socket.h>
	39	#include <netinet/in.h>
	40
	41	#include <netdb.h>
	42	#include <strings.h>
	43	#include <stdio.h>
	44
	45	#include "admin_err.h"
	46	#include "admin_server.h"
	47	#include "prot.h"
	48	#include "krb.h"
	49
	50	extern int krb_err_base; /* Offset between com_err and kerberos codes */
	51	extern int errno; /* System call error numbers */
	52
	53	extern long gethostid();
	54
	55	static u_char strapp(); / string append function */
	56
	57	static int inited = 0; /* are we initialized? */
	58	static int admin_fd = -1; /* socket to talk to admin_server. */
	59
	60	static struct sockaddr_in admin_addr; /* address of admin server. */
	61	static struct sockaddr_in my_addr; /* address bound to admin_fd. */
	62	static int my_addr_len; /* size of above address. */
	63
	64	static char krbrlm[REALM_SZ]; /* Local kerberos realm */
074685e3	65	char admin_errmsg[BUFSIZ]; /* Server error message */
718bc25c	66
	67	/*
	68	* Initialize socket, etc. to use to talk to admin_server.
	69	*/
	70
	71	int admin_call_init()
	72	{
	73	register int status = 0;
	74
	75	if (!inited) {
	76	struct hostent hp; / host to talk to */
	77	struct servent sp; / service to talk to */
3004ebdb	78
718bc25c	79	init_kadm_err_tbl();
	80	if (status = get_krbrlm(krbrlm, 1)) {
	81	status += krb_err_base;
	82	goto punt;
	83	}
	84
	85	/*
	86	* Locate server.
	87	*/
	88
	89	hp = gethostbyname(KERB_HOST);
	90	if (!hp) {
	91	status = ADMIN_UNKNOWN_HOST;
	92	goto punt;
	93	}
	94	sp = getservbyname("atest3", "udp");
	95	if (!sp) {
	96	status = ADMIN_UNKNOWN_SERVICE;
	97	goto punt;
	98	}
	99	bzero((char *)&admin_addr, sizeof(admin_addr));
	100	admin_addr.sin_family = hp->h_addrtype;
	101	bcopy((char )hp->h_addr, (char )&admin_addr.sin_addr, hp->h_length);
	102	admin_addr.sin_port = sp->s_port;
	103
718bc25c	104	inited = 1;
	105	}
	106	return 0;
	107
	108	punt:
	109	(void) close(admin_fd);
	110	admin_fd = -1;
	111	return status;
	112	}
	113
	114	/*
	115	* Build and transmit request to admin_server, and wait for
	116	* response from server. Returns a standard error code.
	117	*/
	118
	119	int
	120	admin_call(opcode, pname, old_passwd, new_passwd, crypt_passwd)
	121	int opcode;
	122	char *pname;
	123	char *old_passwd;
	124	char *new_passwd;
	125	char *crypt_passwd;
	126	{
	127	int status;
	128	register u_char bp; / Pointer into buffer. */
	129	u_char ep; / End of buffer pointer. */
	130
	131	u_char pvt_buf[BUFSIZ]; /* private message plaintext */
	132	int pvt_len; /* length of valid data in pvt_buf */
	133
	134	u_char sealed_buf[BUFSIZ]; /* sealed version of private message */
	135	int sealed_len; /* length of valid data in sealed_buf */
	136
	137	u_long checksum; /* quad_cksum of sealed request. */
	138
	139	C_Block sess_key; /* Session key. */
	140	Key_schedule sess_sched; /* Key schedule for above. */
	141
	142	CREDENTIALS cred; /* Kerberos credentials. */
	143	KTEXT_ST authent; /* Authenticator */
	144	KTEXT_ST reply; /* Reply from admin_server */
	145	MSG_DAT msg_data; /* Decrypted message */
	146	int attempts; /* Number of retransmits so far */
	147
	148	struct sockaddr rec_addr; /* Address we got reply from */
	149	int rec_addr_len; /* Length of that address */
3004ebdb	150	int on = 1; /* ioctl argument */
3004ebdb	151
718bc25c	152
	153	if (!inited) {
	154	status = admin_call_init();
	155	if (status) goto bad;
	156	}
	157
	158	/*
	159	* assemble packet:
	160	*
	161	* sealed message consists of:
	162	* version number (one byte).
	163	* request code (one byte).
	164	* principal name (null terminated).
	165	* new password (in the clear, null terminated).
	166	* old password or instance (null terminated)
	167	* crypt(new password, seed) (null terminated).
	168	* an extra null.
	169	* a '\001' character.
	170	* This is all sealed inside a private_message, with an
	171	* authenticator tacked on in front.
	172	*/
	173
	174	bp = pvt_buf;
	175	ep = pvt_buf + sizeof(pvt_buf);
	176
	177	*bp++ = PW_SRV_VERSION;
	178	*bp++ = opcode;
	179	if ((bp = strapp(bp, (u_char *)pname, ep)) &&
	180	(bp = strapp(bp, (u_char *)new_passwd, ep)) &&
	181	(bp = strapp(bp, (u_char *)old_passwd, ep)) &&
	182	(bp = strapp(bp, (u_char *)crypt_passwd, ep))) {
	183	*bp++ = '\0';
	184	*bp++ = '\1';
	185	pvt_len = bp - pvt_buf;
	186	} else {
	187	status = ADMIN_TOO_LONG;
	188	goto bad;
	189	}
	190
	191	/*
	192	* find our session key.
	193	*/
	194
	195	if (status = get_credentials("changepw", "kerberos", krbrlm, &cred)) {
	196	status += krb_err_base;
	197	goto bad;
	198	}
	199
	200	bcopy((char )cred.session, (char )sess_key, sizeof(sess_key));
	201	bzero((char )cred.session, sizeof(sess_key)); / lest we remember */
	202
	203	if(key_sched(sess_key, sess_sched)) {
	204	status = ADMIN_BAD_KEY;
	205	goto bad;
	206	}
	207
3004ebdb	208	/*
	209	* Set up socket.
	210	*/
	211
	212	admin_fd = socket(admin_addr.sin_family, SOCK_DGRAM, 0);
	213	if (admin_fd < 0) {
	214	status = errno;
	215	goto bad;
	216	}
	217
	218	bzero((char *)&my_addr, sizeof(my_addr));
	219
	220	my_addr.sin_family = admin_addr.sin_family;
	221	my_addr.sin_addr.s_addr = gethostid();
	222
	223	if (bind(admin_fd, &my_addr, sizeof(my_addr)) < 0) {
	224	status = errno;
	225	goto bad;
	226	}
	227
	228	my_addr_len = sizeof(my_addr);
	229
	230	if (getsockname(admin_fd, (struct sockaddr *)&my_addr,
	231	&my_addr_len) < 0) {
	232	status = errno;
	233	goto bad;
	234	}
	235
	236	if (ioctl(admin_fd, FIONBIO, (char *)&on) < 0) {
	237	status = errno;
	238	goto bad;
	239	}
	240
718bc25c	241	/*
	242	* Encrypt the message using the session key.
	243	* Since this contains passwords, it must be kept from prying eyes.
	244	*/
	245
	246	sealed_len = mk_private_msg(pvt_buf, sealed_buf, pvt_len,
	247	sess_sched, sess_key, &my_addr,
	248	&admin_addr);
	249	if (sealed_len < 0) {
	250	status = ADMIN_CANT_ENCRYPT;
	251	goto bad;
	252	}
	253
	254	/*
	255	* Checksum the cypher text, to guard against tampering in flight.
	256	*/
	257
	258	checksum = quad_cksum(sealed_buf, NULL, sealed_len, 0, sess_key);
	259
	260	/*
	261	* Make an authenticator, so the server can learn the session key
	262	* and know who we are.
	263	*/
	264
	265	if (status = mk_ap_req(&authent, "changepw", "kerberos", krbrlm,
	266	checksum)) {
	267	status += krb_err_base;
	268	goto bad;
	269	}
	270
	271	/*
	272	* Add the sealed message to the end of the authenticator.
	273	*/
	274
	275	if ((authent.length + sealed_len) > MAX_KTXT_LEN) {
	276	status = ADMIN_TOO_LONG;
	277	goto bad;
	278	}
	279
	280	bcopy(sealed_buf, authent.dat + authent.length, sealed_len);
	281	authent.length += sealed_len;
	282
	283	/*
	284	* send it off, and wait for a reply.
	285	*/
	286
	287	attempts = 0;
	288
	289	while (attempts++ < RETRY_LIMIT) {
	290	int active; /* number of active fds (from select). */
	291	fd_set set; /* interesting fd's. */
	292	struct timeval timeout; /* timeout on select. */
	293
	294	if (sendto(admin_fd, (char *)authent.dat, authent.length,
	295	0, &admin_addr, sizeof(admin_addr)) != authent.length) {
	296	status = errno;
	297	goto bad;
	298	}
	299
	300	FD_ZERO(&set);
	301	FD_SET(admin_fd, &set);
	302
	303	timeout.tv_sec = USER_TIMEOUT;
	304	timeout.tv_usec = 0;
305
306	active = select(admin_fd+1, &set, (fd_set )0, (fd_set )0, &timeout);
307	if (active < 0) {
308	status = errno;
309	goto bad;
310	} else if (active == 0) continue;
311	else {
312	reply.length = recvfrom(admin_fd, (char *)reply.dat,
313	sizeof(reply.dat), 0,
314	&rec_addr, &rec_addr_len);
315	if (reply.length < 0) continue;
316	#ifdef notdef
317	if (!bcmp(&rec_addr, &admin_addr, sizeof(admin_addr)))
318	/* the spoofers are out in force.. */
319	continue;
320	#endif notdef
321	break; /* got one.. */
322	}
323	}
324
325	if (attempts > RETRY_LIMIT) {
326	status = ETIMEDOUT;
327	goto bad;
328	}
329
330	if (pkt_version((&reply)) != KRB_PROT_VERSION) {
331	status = ADMIN_BAD_VERSION;
332	goto bad;
333	}
334
335	if ((pkt_msg_type((&reply)) & ~1) != AUTH_MSG_PRIVATE) {
336	bp = reply.dat;
337	if (*bp++ != KRB_PROT_VERSION) {
338	status = ADMIN_BAD_VERSION;
339	goto bad;
340	}
341	if (*bp++ != AUTH_MSG_ERR_REPLY) {
342	status = ADMIN_UNKNOWN_CODE;
343	goto bad;
344	}
345	bp += strlen((char )bp) + 1; / Skip name */
346	bp += strlen((char )bp) + 1; / Skip instance */
347	bp += strlen((char )bp) + 1; / Skip realm */
348
349	/* null-terminate error string */
350	reply.dat[reply.length] = '\0';
351
352	if (*bp++ == 126) {
353	status = ADMIN_SERVER_ERROR;
354	strcpy(admin_errmsg, bp);
355	goto bad;
356	} else {
357	status = ADMIN_UNKNOWN_CODE;
358	goto bad;
359	}
360	}
361	status = rd_private_msg(reply.dat, reply.length,
362	sess_sched, sess_key,
363	&admin_addr, &my_addr,
364	&msg_data);
365	if (status) {
366	status += krb_err_base;
367	goto bad;
368	}
369	bp = msg_data.app_data;
370
371	if (*bp++ != PW_SRV_VERSION) {
372	status = ADMIN_BAD_VERSION;
373	goto bad;
374	}
375	if (*bp++ != INSTALL_REPLY) {
376	status = ADMIN_UNKNOWN_CODE;
377	goto bad;
378	}
379
380	status = 0;
381	/* fall through into cleanup */
382
383	bad:
384	/*
385	* Paranoia: shred all the incriminating evidence.
386	* We'll let the caller shred the arguments.
387	*/
388	bzero((char *)sess_key, sizeof(sess_key));
389	bzero((char *)sess_sched, sizeof(sess_sched));
390	bzero(pvt_buf, sizeof(pvt_buf));
3004ebdb	391
	392	if (admin_fd >= 0) {
	393	(void) close(admin_fd);
	394	admin_fd = -1;
	395	}
	396
718bc25c	397	return status;
	398	}
	399
	400	/*
	401	* Copies characters from source to dest, returning a pointer to the
	402	* point in dest after the last character copied from source.
	403	* If this would be greater than end, no characters are copied, and NULL
	404	* is returned instead.
	405	*/
	406
	407	static u_char *strapp(dest, source, end)
	408	register u_char dest, source, *end;
	409	{
	410	register int length = strlen(source) + 1;
	411	if (dest+length > end) return NULL;
	412	else {
	413	bcopy(source, dest, length);
	414	return dest + length;
	415	}
	416	}
	417
	418	/*
	419	* Local Variables:
	420	* mode: c
	421	* c-indent-level: 4
	422	* c-continued-statement-offset: 4
	423	* c-brace-offset: -4
	424	* c-argdecl-indent: 4
	425	* c-label-offset: -4
	426	* End:
	427	*/