[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
 *
 */

#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 <ctype.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 */
static char krbhost[BUFSIZ];	/* Name of server for local 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.
	 */

	if (status = get_krbhst(krbhost, krbrlm, 1)) {
	    status += krb_err_base;
	    goto punt;
	}
	hp = gethostbyname(krbhost);
	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;

	/* lowercase & truncate hostname becuase it will be used as an
	 * instance name.
	 */
        {
	    char *s;
	    for (s = krbhost; *s && *s != '.'; s++)
		if (isupper(*s))
		    *s = tolower(*s);
	    *s = 0;
	}
	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 = krb_get_cred("changepw", krbhost, 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 = krb_mk_priv(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 = krb_mk_req(&authent, "changepw", krbhost, 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 = krb_rd_priv(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	*
718bc25c	13	*/
	14
	15	#ifndef lint
	16	static char *rcsid_admin_call_c = "$Header$";
	17	#endif lint
	18
	19	#include <sys/errno.h>
	20	#include <sys/types.h>
	21	#include <sys/time.h>
	22	#include <sys/ioctl.h>
	23	#include <sys/socket.h>
	24	#include <netinet/in.h>
	25
	26	#include <netdb.h>
	27	#include <strings.h>
8670255d	28	#include <ctype.h>
718bc25c	29	#include <stdio.h>
	30
	31	#include "admin_err.h"
	32	#include "admin_server.h"
	33	#include "prot.h"
	34	#include "krb.h"
	35
	36	extern int krb_err_base; /* Offset between com_err and kerberos codes */
	37	extern int errno; /* System call error numbers */
	38
	39	extern long gethostid();
	40
	41	static u_char strapp(); / string append function */
	42
	43	static int inited = 0; /* are we initialized? */
	44	static int admin_fd = -1; /* socket to talk to admin_server. */
	45
	46	static struct sockaddr_in admin_addr; /* address of admin server. */
	47	static struct sockaddr_in my_addr; /* address bound to admin_fd. */
	48	static int my_addr_len; /* size of above address. */
	49
	50	static char krbrlm[REALM_SZ]; /* Local kerberos realm */
71a6c578	51	static char krbhost[BUFSIZ]; /* Name of server for local realm */
074685e3	52	char admin_errmsg[BUFSIZ]; /* Server error message */
718bc25c	53
	54	/*
	55	* Initialize socket, etc. to use to talk to admin_server.
	56	*/
	57
	58	int admin_call_init()
	59	{
	60	register int status = 0;
	61
	62	if (!inited) {
	63	struct hostent hp; / host to talk to */
	64	struct servent sp; / service to talk to */
3004ebdb	65
718bc25c	66	init_kadm_err_tbl();
	67	if (status = get_krbrlm(krbrlm, 1)) {
	68	status += krb_err_base;
	69	goto punt;
	70	}
	71
	72	/*
	73	* Locate server.
	74	*/
	75
71a6c578	76	if (status = get_krbhst(krbhost, krbrlm, 1)) {
	77	status += krb_err_base;
	78	goto punt;
	79	}
	80	hp = gethostbyname(krbhost);
718bc25c	81	if (!hp) {
	82	status = ADMIN_UNKNOWN_HOST;
	83	goto punt;
	84	}
	85	sp = getservbyname("atest3", "udp");
	86	if (!sp) {
	87	status = ADMIN_UNKNOWN_SERVICE;
	88	goto punt;
	89	}
	90	bzero((char *)&admin_addr, sizeof(admin_addr));
	91	admin_addr.sin_family = hp->h_addrtype;
	92	bcopy((char )hp->h_addr, (char )&admin_addr.sin_addr, hp->h_length);
	93	admin_addr.sin_port = sp->s_port;
	94
8670255d	95	/* lowercase & truncate hostname becuase it will be used as an
	96	* instance name.
	97	*/
	98	{
	99	char *s;
	100	for (s = krbhost; s && s != '.'; s++)
	101	if (isupper(*s))
	102	s = tolower(s);
	103	*s = 0;
	104	}
718bc25c	105	inited = 1;
	106	}
	107	return 0;
	108
	109	punt:
	110	(void) close(admin_fd);
	111	admin_fd = -1;
	112	return status;
	113	}
	114
	115	/*
	116	* Build and transmit request to admin_server, and wait for
	117	* response from server. Returns a standard error code.
	118	*/
	119
	120	int
	121	admin_call(opcode, pname, old_passwd, new_passwd, crypt_passwd)
	122	int opcode;
	123	char *pname;
	124	char *old_passwd;
	125	char *new_passwd;
	126	char *crypt_passwd;
	127	{
	128	int status;
	129	register u_char bp; / Pointer into buffer. */
	130	u_char ep; / End of buffer pointer. */
	131
	132	u_char pvt_buf[BUFSIZ]; /* private message plaintext */
	133	int pvt_len; /* length of valid data in pvt_buf */
	134
	135	u_char sealed_buf[BUFSIZ]; /* sealed version of private message */
	136	int sealed_len; /* length of valid data in sealed_buf */
	137
	138	u_long checksum; /* quad_cksum of sealed request. */
	139
	140	C_Block sess_key; /* Session key. */
	141	Key_schedule sess_sched; /* Key schedule for above. */
	142
	143	CREDENTIALS cred; /* Kerberos credentials. */
	144	KTEXT_ST authent; /* Authenticator */
	145	KTEXT_ST reply; /* Reply from admin_server */
	146	MSG_DAT msg_data; /* Decrypted message */
	147	int attempts; /* Number of retransmits so far */
	148
	149	struct sockaddr rec_addr; /* Address we got reply from */
	150	int rec_addr_len; /* Length of that address */
3004ebdb	151	int on = 1; /* ioctl argument */
3004ebdb	152
718bc25c	153
	154	if (!inited) {
	155	status = admin_call_init();
	156	if (status) goto bad;
	157	}
	158
	159	/*
	160	* assemble packet:
	161	*
	162	* sealed message consists of:
	163	* version number (one byte).
	164	* request code (one byte).
	165	* principal name (null terminated).
	166	* new password (in the clear, null terminated).
	167	* old password or instance (null terminated)
	168	* crypt(new password, seed) (null terminated).
	169	* an extra null.
	170	* a '\001' character.
	171	* This is all sealed inside a private_message, with an
	172	* authenticator tacked on in front.
	173	*/
	174
	175	bp = pvt_buf;
	176	ep = pvt_buf + sizeof(pvt_buf);
	177
	178	*bp++ = PW_SRV_VERSION;
	179	*bp++ = opcode;
	180	if ((bp = strapp(bp, (u_char *)pname, ep)) &&
	181	(bp = strapp(bp, (u_char *)new_passwd, ep)) &&
	182	(bp = strapp(bp, (u_char *)old_passwd, ep)) &&
	183	(bp = strapp(bp, (u_char *)crypt_passwd, ep))) {
	184	*bp++ = '\0';
	185	*bp++ = '\1';
	186	pvt_len = bp - pvt_buf;
	187	} else {
	188	status = ADMIN_TOO_LONG;
	189	goto bad;
	190	}
	191
	192	/*
	193	* find our session key.
	194	*/
	195
8670255d	196	if (status = krb_get_cred("changepw", krbhost, krbrlm, &cred)) {
718bc25c	197	status += krb_err_base;
	198	goto bad;
	199	}
	200
	201	bcopy((char )cred.session, (char )sess_key, sizeof(sess_key));
	202	bzero((char )cred.session, sizeof(sess_key)); / lest we remember */
	203
	204	if(key_sched(sess_key, sess_sched)) {
	205	status = ADMIN_BAD_KEY;
	206	goto bad;
	207	}
	208
3004ebdb	209	/*
	210	* Set up socket.
	211	*/
	212
	213	admin_fd = socket(admin_addr.sin_family, SOCK_DGRAM, 0);
	214	if (admin_fd < 0) {
	215	status = errno;
	216	goto bad;
	217	}
	218
	219	bzero((char *)&my_addr, sizeof(my_addr));
	220
	221	my_addr.sin_family = admin_addr.sin_family;
	222	my_addr.sin_addr.s_addr = gethostid();
	223
	224	if (bind(admin_fd, &my_addr, sizeof(my_addr)) < 0) {
	225	status = errno;
	226	goto bad;
	227	}
	228
	229	my_addr_len = sizeof(my_addr);
	230
	231	if (getsockname(admin_fd, (struct sockaddr *)&my_addr,
	232	&my_addr_len) < 0) {
	233	status = errno;
	234	goto bad;
	235	}
	236
	237	if (ioctl(admin_fd, FIONBIO, (char *)&on) < 0) {
	238	status = errno;
	239	goto bad;
	240	}
	241
718bc25c	242	/*
	243	* Encrypt the message using the session key.
	244	* Since this contains passwords, it must be kept from prying eyes.
	245	*/
	246
e5fdb505	247	sealed_len = krb_mk_priv(pvt_buf, sealed_buf, pvt_len,
718bc25c	248	sess_sched, sess_key, &my_addr,
	249	&admin_addr);
	250	if (sealed_len < 0) {
	251	status = ADMIN_CANT_ENCRYPT;
	252	goto bad;
	253	}
	254
	255	/*
	256	* Checksum the cypher text, to guard against tampering in flight.
	257	*/
	258
	259	checksum = quad_cksum(sealed_buf, NULL, sealed_len, 0, sess_key);
	260
	261	/*
	262	* Make an authenticator, so the server can learn the session key
	263	* and know who we are.
	264	*/
	265
8670255d	266	if (status = krb_mk_req(&authent, "changepw", krbhost, krbrlm,
718bc25c	267	checksum)) {
	268	status += krb_err_base;
	269	goto bad;
	270	}
	271
	272	/*
	273	* Add the sealed message to the end of the authenticator.
	274	*/
	275
	276	if ((authent.length + sealed_len) > MAX_KTXT_LEN) {
	277	status = ADMIN_TOO_LONG;
	278	goto bad;
	279	}
	280
	281	bcopy(sealed_buf, authent.dat + authent.length, sealed_len);
	282	authent.length += sealed_len;
	283
	284	/*
	285	* send it off, and wait for a reply.
	286	*/
	287
	288	attempts = 0;
	289
	290	while (attempts++ < RETRY_LIMIT) {
	291	int active; /* number of active fds (from select). */
	292	fd_set set; /* interesting fd's. */
	293	struct timeval timeout; /* timeout on select. */
	294
	295	if (sendto(admin_fd, (char *)authent.dat, authent.length,
	296	0, &admin_addr, sizeof(admin_addr)) != authent.length) {
	297	status = errno;
	298	goto bad;
	299	}
	300
	301	FD_ZERO(&set);
	302	FD_SET(admin_fd, &set);
	303
	304	timeout.tv_sec = USER_TIMEOUT;
	305	timeout.tv_usec = 0;
	306
	307	active = select(admin_fd+1, &set, (fd_set )0, (fd_set )0, &timeout);
	308	if (active < 0) {
	309	status = errno;
	310	goto bad;
	311	} else if (active == 0) continue;
	312	else {
	313	reply.length = recvfrom(admin_fd, (char *)reply.dat,
	314	sizeof(reply.dat), 0,
	315	&rec_addr, &rec_addr_len);
	316	if (reply.length < 0) continue;
	317	#ifdef notdef
	318	if (!bcmp(&rec_addr, &admin_addr, sizeof(admin_addr)))
	319	/* the spoofers are out in force.. */
	320	continue;
	321	#endif notdef
	322	break; /* got one.. */
	323	}
	324	}
	325
	326	if (attempts > RETRY_LIMIT) {
	327	status = ETIMEDOUT;
	328	goto bad;
	329	}
	330
331	if (pkt_version((&reply)) != KRB_PROT_VERSION) {
332	status = ADMIN_BAD_VERSION;
333	goto bad;
334	}
335
336	if ((pkt_msg_type((&reply)) & ~1) != AUTH_MSG_PRIVATE) {
337	bp = reply.dat;
338	if (*bp++ != KRB_PROT_VERSION) {
339	status = ADMIN_BAD_VERSION;
340	goto bad;
341	}
342	if (*bp++ != AUTH_MSG_ERR_REPLY) {
343	status = ADMIN_UNKNOWN_CODE;
344	goto bad;
345	}
346	bp += strlen((char )bp) + 1; / Skip name */
347	bp += strlen((char )bp) + 1; / Skip instance */
348	bp += strlen((char )bp) + 1; / Skip realm */
349
350	/* null-terminate error string */
351	reply.dat[reply.length] = '\0';
352
353	if (*bp++ == 126) {
354	status = ADMIN_SERVER_ERROR;
355	strcpy(admin_errmsg, bp);
356	goto bad;
357	} else {
358	status = ADMIN_UNKNOWN_CODE;
359	goto bad;
360	}
361	}
e5fdb505	362	status = krb_rd_priv(reply.dat, reply.length,
718bc25c	363	sess_sched, sess_key,
	364	&admin_addr, &my_addr,
	365	&msg_data);
	366	if (status) {
	367	status += krb_err_base;
	368	goto bad;
	369	}
	370	bp = msg_data.app_data;
	371
	372	if (*bp++ != PW_SRV_VERSION) {
	373	status = ADMIN_BAD_VERSION;
	374	goto bad;
	375	}
	376	if (*bp++ != INSTALL_REPLY) {
	377	status = ADMIN_UNKNOWN_CODE;
	378	goto bad;
	379	}
	380
	381	status = 0;
	382	/* fall through into cleanup */
	383
	384	bad:
	385	/*
	386	* Paranoia: shred all the incriminating evidence.
	387	* We'll let the caller shred the arguments.
	388	*/
	389	bzero((char *)sess_key, sizeof(sess_key));
	390	bzero((char *)sess_sched, sizeof(sess_sched));
	391	bzero(pvt_buf, sizeof(pvt_buf));
3004ebdb	392
	393	if (admin_fd >= 0) {
	394	(void) close(admin_fd);
	395	admin_fd = -1;
	396	}
	397
718bc25c	398	return status;
	399	}
	400
	401	/*
	402	* Copies characters from source to dest, returning a pointer to the
	403	* point in dest after the last character copied from source.
	404	* If this would be greater than end, no characters are copied, and NULL
	405	* is returned instead.
	406	*/
	407
	408	static u_char *strapp(dest, source, end)
	409	register u_char dest, source, *end;
	410	{
	411	register int length = strlen(source) + 1;
	412	if (dest+length > end) return NULL;
	413	else {
	414	bcopy(source, dest, length);
	415	return dest + length;
	416	}
	417	}
	418
	419	/*
	420	* Local Variables:
	421	* mode: c
	422	* c-indent-level: 4
	423	* c-continued-statement-offset: 4
	424	* c-brace-offset: -4
	425	* c-argdecl-indent: 4
	426	* c-label-offset: -4
	427	* End:
	428	*/