kerberos.c revision 57442
129088Smarkm/*- 229088Smarkm * Copyright (c) 1991, 1993 329088Smarkm * The Regents of the University of California. All rights reserved. 429088Smarkm * 529088Smarkm * Redistribution and use in source and binary forms, with or without 629088Smarkm * modification, are permitted provided that the following conditions 729088Smarkm * are met: 829088Smarkm * 1. Redistributions of source code must retain the above copyright 929088Smarkm * notice, this list of conditions and the following disclaimer. 1029088Smarkm * 2. Redistributions in binary form must reproduce the above copyright 1129088Smarkm * notice, this list of conditions and the following disclaimer in the 1229088Smarkm * documentation and/or other materials provided with the distribution. 1329088Smarkm * 3. All advertising materials mentioning features or use of this software 1429088Smarkm * must display the following acknowledgement: 1529088Smarkm * This product includes software developed by the University of 1629088Smarkm * California, Berkeley and its contributors. 1729088Smarkm * 4. Neither the name of the University nor the names of its contributors 1829088Smarkm * may be used to endorse or promote products derived from this software 1929088Smarkm * without specific prior written permission. 2029088Smarkm * 2129088Smarkm * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2229088Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2329088Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2429088Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2529088Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2629088Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2729088Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2829088Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2929088Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3029088Smarkm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3129088Smarkm * SUCH DAMAGE. 3257442Smarkm * 3357442Smarkm * $FreeBSD: head/contrib/telnet/libtelnet/kerberos.c 57442 2000-02-24 19:28:31Z markm $ 3429088Smarkm */ 3529088Smarkm 3629088Smarkm#ifndef lint 3729181Smarkmstatic const char sccsid[] = "@(#)kerberos.c 8.3 (Berkeley) 5/30/95"; 3829088Smarkm#endif /* not lint */ 3929088Smarkm 4029088Smarkm/* 4129088Smarkm * Copyright (C) 1990 by the Massachusetts Institute of Technology 4229088Smarkm * 4329088Smarkm * Export of this software from the United States of America is assumed 4429088Smarkm * to require a specific license from the United States Government. 4529088Smarkm * It is the responsibility of any person or organization contemplating 4629088Smarkm * export to obtain such a license before exporting. 4729088Smarkm * 4829088Smarkm * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 4929088Smarkm * distribute this software and its documentation for any purpose and 5029088Smarkm * without fee is hereby granted, provided that the above copyright 5129088Smarkm * notice appear in all copies and that both that copyright notice and 5229088Smarkm * this permission notice appear in supporting documentation, and that 5329088Smarkm * the name of M.I.T. not be used in advertising or publicity pertaining 5429088Smarkm * to distribution of the software without specific, written prior 5529088Smarkm * permission. M.I.T. makes no representations about the suitability of 5629088Smarkm * this software for any purpose. It is provided "as is" without express 5729088Smarkm * or implied warranty. 5829088Smarkm */ 5929088Smarkm 6029088Smarkm#ifdef KRB4 6129088Smarkm#include <sys/types.h> 6229088Smarkm#include <arpa/telnet.h> 6329088Smarkm#include <stdio.h> 6457442Smarkm#include <openssl/des.h> /* BSD wont include this in krb.h, so we do it here */ 6529088Smarkm#include <krb.h> 6629088Smarkm#ifdef __STDC__ 6729088Smarkm#include <stdlib.h> 6829088Smarkm#endif 6929088Smarkm#ifdef NO_STRING_H 7029088Smarkm#include <strings.h> 7129088Smarkm#else 7229088Smarkm#include <string.h> 7329088Smarkm#endif 7429088Smarkm 7529088Smarkm#include "encrypt.h" 7629088Smarkm#include "auth.h" 7729088Smarkm#include "misc.h" 7829088Smarkm 7929088Smarkmint kerberos4_cksum P((unsigned char *, int)); 8029088Smarkmint kuserok P((AUTH_DAT *, char *)); 8129088Smarkm 8229088Smarkmextern auth_debug_mode; 8329088Smarkm 8429088Smarkmstatic unsigned char str_data[1024] = { IAC, SB, TELOPT_AUTHENTICATION, 0, 8529088Smarkm AUTHTYPE_KERBEROS_V4, }; 8629088Smarkm 8729088Smarkm#define KRB_AUTH 0 /* Authentication data follows */ 8829088Smarkm#define KRB_REJECT 1 /* Rejected (reason might follow) */ 8929088Smarkm#define KRB_ACCEPT 2 /* Accepted */ 9029088Smarkm#define KRB_CHALLENGE 3 /* Challenge for mutual auth. */ 9129088Smarkm#define KRB_RESPONSE 4 /* Response for mutual auth. */ 9229088Smarkm 9329088Smarkm#define KRB_SERVICE_NAME "rcmd" 9429088Smarkm 9529088Smarkmstatic KTEXT_ST auth; 9629088Smarkmstatic char name[ANAME_SZ]; 9729088Smarkmstatic AUTH_DAT adat = { 0 }; 9829088Smarkm#ifdef ENCRYPTION 9929088Smarkmstatic Block session_key = { 0 }; 10029181Smarkmstatic des_key_schedule sched; 10129088Smarkmstatic Block challenge = { 0 }; 10229088Smarkm#endif /* ENCRYPTION */ 10329088Smarkm 10429088Smarkm static int 10529088SmarkmData(ap, type, d, c) 10629088Smarkm Authenticator *ap; 10729088Smarkm int type; 10829088Smarkm void *d; 10929088Smarkm int c; 11029088Smarkm{ 11129088Smarkm unsigned char *p = str_data + 4; 11229088Smarkm unsigned char *cd = (unsigned char *)d; 11329088Smarkm 11429088Smarkm if (c == -1) 11529088Smarkm c = strlen((char *)cd); 11629088Smarkm 11729088Smarkm if (auth_debug_mode) { 11829088Smarkm printf("%s:%d: [%d] (%d)", 11929088Smarkm str_data[3] == TELQUAL_IS ? ">>>IS" : ">>>REPLY", 12029088Smarkm str_data[3], 12129088Smarkm type, c); 12229088Smarkm printd(d, c); 12329088Smarkm printf("\r\n"); 12429088Smarkm } 12529088Smarkm *p++ = ap->type; 12629088Smarkm *p++ = ap->way; 12729088Smarkm *p++ = type; 12829088Smarkm while (c-- > 0) { 12929088Smarkm if ((*p++ = *cd++) == IAC) 13029088Smarkm *p++ = IAC; 13129088Smarkm } 13229088Smarkm *p++ = IAC; 13329088Smarkm *p++ = SE; 13429088Smarkm if (str_data[3] == TELQUAL_IS) 13529088Smarkm printsub('>', &str_data[2], p - (&str_data[2])); 13629088Smarkm return(net_write(str_data, p - str_data)); 13729088Smarkm} 13829088Smarkm 13929088Smarkm int 14029088Smarkmkerberos4_init(ap, server) 14129088Smarkm Authenticator *ap; 14229088Smarkm int server; 14329088Smarkm{ 14429088Smarkm FILE *fp; 14529088Smarkm 14629088Smarkm if (server) { 14729088Smarkm str_data[3] = TELQUAL_REPLY; 14829088Smarkm if ((fp = fopen(KEYFILE, "r")) == NULL) 14929088Smarkm return(0); 15029088Smarkm fclose(fp); 15129088Smarkm } else { 15229088Smarkm str_data[3] = TELQUAL_IS; 15329088Smarkm } 15429088Smarkm return(1); 15529088Smarkm} 15629088Smarkm 15729088Smarkmchar dst_realm_buf[REALM_SZ], *dest_realm = NULL; 15829088Smarkmint dst_realm_sz = REALM_SZ; 15929088Smarkm 16029088Smarkm int 16129088Smarkmkerberos4_send(ap) 16229088Smarkm Authenticator *ap; 16329088Smarkm{ 16429088Smarkm KTEXT_ST auth; 16529088Smarkm char instance[INST_SZ]; 16629088Smarkm char *realm; 16729088Smarkm char *krb_realmofhost(); 16829088Smarkm char *krb_get_phost(); 16929088Smarkm CREDENTIALS cred; 17029088Smarkm int r; 17129088Smarkm 17229088Smarkm printf("[ Trying KERBEROS4 ... ]\n"); 17329088Smarkm if (!UserNameRequested) { 17429088Smarkm if (auth_debug_mode) { 17529088Smarkm printf("Kerberos V4: no user name supplied\r\n"); 17629088Smarkm } 17729088Smarkm return(0); 17829088Smarkm } 17929088Smarkm 18029088Smarkm memset(instance, 0, sizeof(instance)); 18129088Smarkm 18229181Smarkm if ((realm = krb_get_phost(RemoteHostName))) 18329088Smarkm strncpy(instance, realm, sizeof(instance)); 18429088Smarkm 18529088Smarkm instance[sizeof(instance)-1] = '\0'; 18629088Smarkm 18729088Smarkm realm = dest_realm ? dest_realm : krb_realmofhost(RemoteHostName); 18829088Smarkm 18929088Smarkm if (!realm) { 19029088Smarkm printf("Kerberos V4: no realm for %s\r\n", RemoteHostName); 19129088Smarkm return(0); 19229088Smarkm } 19329181Smarkm if ((r = krb_mk_req(&auth, KRB_SERVICE_NAME, instance, realm, 0L))) { 19429088Smarkm printf("mk_req failed: %s\r\n", krb_err_txt[r]); 19529088Smarkm return(0); 19629088Smarkm } 19729181Smarkm if ((r = krb_get_cred(KRB_SERVICE_NAME, instance, realm, &cred))) { 19829088Smarkm printf("get_cred failed: %s\r\n", krb_err_txt[r]); 19929088Smarkm return(0); 20029088Smarkm } 20129088Smarkm if (!auth_sendname(UserNameRequested, strlen(UserNameRequested))) { 20229088Smarkm if (auth_debug_mode) 20329088Smarkm printf("Not enough room for user name\r\n"); 20429088Smarkm return(0); 20529088Smarkm } 20629088Smarkm if (auth_debug_mode) 20729088Smarkm printf("Sent %d bytes of authentication data\r\n", auth.length); 20829088Smarkm if (!Data(ap, KRB_AUTH, (void *)auth.dat, auth.length)) { 20929088Smarkm if (auth_debug_mode) 21029088Smarkm printf("Not enough room for authentication data\r\n"); 21129088Smarkm return(0); 21229088Smarkm } 21329088Smarkm#ifdef ENCRYPTION 21429088Smarkm /* 21529088Smarkm * If we are doing mutual authentication, get set up to send 21629088Smarkm * the challenge, and verify it when the response comes back. 21729088Smarkm */ 21829088Smarkm if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) { 21929088Smarkm register int i; 22029088Smarkm 22129181Smarkm des_key_sched(&cred.session, sched); 22229181Smarkm des_init_random_number_generator(&cred.session); 22329181Smarkm des_new_random_key(&session_key); 22429181Smarkm des_ecb_encrypt(&session_key, &session_key, sched, 0); 22529181Smarkm des_ecb_encrypt(&session_key, &challenge, sched, 0); 22629088Smarkm /* 22729088Smarkm * Increment the challenge by 1, and encrypt it for 22829088Smarkm * later comparison. 22929088Smarkm */ 23029088Smarkm for (i = 7; i >= 0; --i) { 23129088Smarkm register int x; 23229088Smarkm x = (unsigned int)challenge[i] + 1; 23329088Smarkm challenge[i] = x; /* ignore overflow */ 23429088Smarkm if (x < 256) /* if no overflow, all done */ 23529088Smarkm break; 23629088Smarkm } 23729181Smarkm des_ecb_encrypt(&challenge, &challenge, sched, 1); 23829088Smarkm } 23929088Smarkm#endif /* ENCRYPTION */ 24029088Smarkm 24129088Smarkm if (auth_debug_mode) { 24229088Smarkm printf("CK: %d:", kerberos4_cksum(auth.dat, auth.length)); 24329088Smarkm printd(auth.dat, auth.length); 24429088Smarkm printf("\r\n"); 24529088Smarkm printf("Sent Kerberos V4 credentials to server\r\n"); 24629088Smarkm } 24729088Smarkm return(1); 24829088Smarkm} 24929088Smarkm 25029088Smarkm void 25129088Smarkmkerberos4_is(ap, data, cnt) 25229088Smarkm Authenticator *ap; 25329088Smarkm unsigned char *data; 25429088Smarkm int cnt; 25529088Smarkm{ 25629088Smarkm#ifdef ENCRYPTION 25729088Smarkm Session_Key skey; 25829088Smarkm Block datablock; 25929088Smarkm#endif /* ENCRYPTION */ 26029088Smarkm char realm[REALM_SZ]; 26129088Smarkm char instance[INST_SZ]; 26229088Smarkm int r; 26329088Smarkm 26429088Smarkm if (cnt-- < 1) 26529088Smarkm return; 26629088Smarkm switch (*data++) { 26729088Smarkm case KRB_AUTH: 26829088Smarkm if (krb_get_lrealm(realm, 1) != KSUCCESS) { 26929088Smarkm Data(ap, KRB_REJECT, (void *)"No local V4 Realm.", -1); 27029088Smarkm auth_finished(ap, AUTH_REJECT); 27129088Smarkm if (auth_debug_mode) 27229088Smarkm printf("No local realm\r\n"); 27329088Smarkm return; 27429088Smarkm } 27529088Smarkm memmove((void *)auth.dat, (void *)data, auth.length = cnt); 27629088Smarkm if (auth_debug_mode) { 27729088Smarkm printf("Got %d bytes of authentication data\r\n", cnt); 27829088Smarkm printf("CK: %d:", kerberos4_cksum(auth.dat, auth.length)); 27929088Smarkm printd(auth.dat, auth.length); 28029088Smarkm printf("\r\n"); 28129088Smarkm } 28229088Smarkm instance[0] = '*'; instance[1] = 0; 28329181Smarkm if ((r = krb_rd_req(&auth, KRB_SERVICE_NAME, 28429181Smarkm instance, 0, &adat, ""))) { 28529088Smarkm if (auth_debug_mode) 28629088Smarkm printf("Kerberos failed him as %s\r\n", name); 28729088Smarkm Data(ap, KRB_REJECT, (void *)krb_err_txt[r], -1); 28829088Smarkm auth_finished(ap, AUTH_REJECT); 28929088Smarkm return; 29029088Smarkm } 29129088Smarkm#ifdef ENCRYPTION 29229088Smarkm memmove((void *)session_key, (void *)adat.session, sizeof(Block)); 29329088Smarkm#endif /* ENCRYPTION */ 29429088Smarkm krb_kntoln(&adat, name); 29529088Smarkm 29629088Smarkm if (UserNameRequested && !kuserok(&adat, UserNameRequested)) 29729088Smarkm Data(ap, KRB_ACCEPT, (void *)0, 0); 29829088Smarkm else 29929088Smarkm Data(ap, KRB_REJECT, 30029088Smarkm (void *)"user is not authorized", -1); 30129088Smarkm auth_finished(ap, AUTH_USER); 30229088Smarkm break; 30329088Smarkm 30429088Smarkm case KRB_CHALLENGE: 30529088Smarkm#ifndef ENCRYPTION 30629088Smarkm Data(ap, KRB_RESPONSE, (void *)0, 0); 30729088Smarkm#else /* ENCRYPTION */ 30829088Smarkm if (!VALIDKEY(session_key)) { 30929088Smarkm /* 31029088Smarkm * We don't have a valid session key, so just 31129088Smarkm * send back a response with an empty session 31229088Smarkm * key. 31329088Smarkm */ 31429088Smarkm Data(ap, KRB_RESPONSE, (void *)0, 0); 31529088Smarkm break; 31629088Smarkm } 31729088Smarkm 31829088Smarkm /* 31929088Smarkm * Initialize the random number generator since it's 32029088Smarkm * used later on by the encryption routine. 32129088Smarkm */ 32229181Smarkm des_init_random_number_generator(&session_key); 32329181Smarkm des_key_sched(&session_key, sched); 32429088Smarkm memmove((void *)datablock, (void *)data, sizeof(Block)); 32529088Smarkm /* 32629088Smarkm * Take the received encrypted challenge, and encrypt 32729088Smarkm * it again to get a unique session_key for the 32829088Smarkm * ENCRYPT option. 32929088Smarkm */ 33029181Smarkm des_ecb_encrypt(&datablock, &session_key, sched, 1); 33129088Smarkm skey.type = SK_DES; 33229088Smarkm skey.length = 8; 33329088Smarkm skey.data = session_key; 33429088Smarkm encrypt_session_key(&skey, 1); 33529088Smarkm /* 33629088Smarkm * Now decrypt the received encrypted challenge, 33729088Smarkm * increment by one, re-encrypt it and send it back. 33829088Smarkm */ 33929181Smarkm des_ecb_encrypt(&datablock, &challenge, sched, 0); 34029088Smarkm for (r = 7; r >= 0; r--) { 34129088Smarkm register int t; 34229088Smarkm t = (unsigned int)challenge[r] + 1; 34329088Smarkm challenge[r] = t; /* ignore overflow */ 34429088Smarkm if (t < 256) /* if no overflow, all done */ 34529088Smarkm break; 34629088Smarkm } 34729181Smarkm des_ecb_encrypt(&challenge, &challenge, sched, 1); 34829088Smarkm Data(ap, KRB_RESPONSE, (void *)challenge, sizeof(challenge)); 34929088Smarkm#endif /* ENCRYPTION */ 35029088Smarkm break; 35129088Smarkm 35229088Smarkm default: 35329088Smarkm if (auth_debug_mode) 35429088Smarkm printf("Unknown Kerberos option %d\r\n", data[-1]); 35529088Smarkm Data(ap, KRB_REJECT, 0, 0); 35629088Smarkm break; 35729088Smarkm } 35829088Smarkm} 35929088Smarkm 36029088Smarkm void 36129088Smarkmkerberos4_reply(ap, data, cnt) 36229088Smarkm Authenticator *ap; 36329088Smarkm unsigned char *data; 36429088Smarkm int cnt; 36529088Smarkm{ 36629088Smarkm#ifdef ENCRYPTION 36729088Smarkm Session_Key skey; 36829088Smarkm#endif /* ENCRYPTION */ 36929088Smarkm 37029088Smarkm if (cnt-- < 1) 37129088Smarkm return; 37229088Smarkm switch (*data++) { 37329088Smarkm case KRB_REJECT: 37429088Smarkm if (cnt > 0) { 37529088Smarkm printf("[ Kerberos V4 refuses authentication because %.*s ]\r\n", 37629088Smarkm cnt, data); 37729088Smarkm } else 37829088Smarkm printf("[ Kerberos V4 refuses authentication ]\r\n"); 37929088Smarkm auth_send_retry(); 38029088Smarkm return; 38129088Smarkm case KRB_ACCEPT: 38229088Smarkm printf("[ Kerberos V4 accepts you ]\n"); 38329088Smarkm if ((ap->way & AUTH_HOW_MASK) == AUTH_HOW_MUTUAL) { 38429088Smarkm /* 38529088Smarkm * Send over the encrypted challenge. 38629088Smarkm */ 38729088Smarkm#ifndef ENCRYPTION 38829088Smarkm Data(ap, KRB_CHALLENGE, (void *)0, 0); 38929088Smarkm#else /* ENCRYPTION */ 39029088Smarkm Data(ap, KRB_CHALLENGE, (void *)session_key, 39129088Smarkm sizeof(session_key)); 39229181Smarkm des_ecb_encrypt(&session_key, &session_key, sched, 1); 39329088Smarkm skey.type = SK_DES; 39429088Smarkm skey.length = 8; 39529088Smarkm skey.data = session_key; 39629088Smarkm encrypt_session_key(&skey, 0); 39729088Smarkm#endif /* ENCRYPTION */ 39829088Smarkm return; 39929088Smarkm } 40029088Smarkm auth_finished(ap, AUTH_USER); 40129088Smarkm return; 40229088Smarkm case KRB_RESPONSE: 40329088Smarkm#ifdef ENCRYPTION 40429088Smarkm /* 40529088Smarkm * Verify that the response to the challenge is correct. 40629088Smarkm */ 40729088Smarkm if ((cnt != sizeof(Block)) || 40829088Smarkm (0 != memcmp((void *)data, (void *)challenge, 40929088Smarkm sizeof(challenge)))) 41029088Smarkm { 41129088Smarkm#endif /* ENCRYPTION */ 41229088Smarkm printf("[ Kerberos V4 challenge failed!!! ]\r\n"); 41329088Smarkm auth_send_retry(); 41429088Smarkm return; 41529088Smarkm#ifdef ENCRYPTION 41629088Smarkm } 41729088Smarkm printf("[ Kerberos V4 challenge successful ]\r\n"); 41829088Smarkm auth_finished(ap, AUTH_USER); 41929088Smarkm#endif /* ENCRYPTION */ 42029088Smarkm break; 42129088Smarkm default: 42229088Smarkm if (auth_debug_mode) 42329088Smarkm printf("Unknown Kerberos option %d\r\n", data[-1]); 42429088Smarkm return; 42529088Smarkm } 42629088Smarkm} 42729088Smarkm 42829088Smarkm int 42929088Smarkmkerberos4_status(ap, name, level) 43029088Smarkm Authenticator *ap; 43129088Smarkm char *name; 43229088Smarkm int level; 43329088Smarkm{ 43429088Smarkm if (level < AUTH_USER) 43529088Smarkm return(level); 43629088Smarkm 43729088Smarkm if (UserNameRequested && !kuserok(&adat, UserNameRequested)) { 43829088Smarkm strcpy(name, UserNameRequested); 43929088Smarkm return(AUTH_VALID); 44029088Smarkm } else 44129088Smarkm return(AUTH_USER); 44229088Smarkm} 44329088Smarkm 44429088Smarkm#define BUMP(buf, len) while (*(buf)) {++(buf), --(len);} 44529088Smarkm#define ADDC(buf, len, c) if ((len) > 0) {*(buf)++ = (c); --(len);} 44629088Smarkm 44729088Smarkm void 44829088Smarkmkerberos4_printsub(data, cnt, buf, buflen) 44929088Smarkm unsigned char *data, *buf; 45029088Smarkm int cnt, buflen; 45129088Smarkm{ 45229088Smarkm char lbuf[32]; 45329088Smarkm register int i; 45429088Smarkm 45529088Smarkm buf[buflen-1] = '\0'; /* make sure its NULL terminated */ 45629088Smarkm buflen -= 1; 45729088Smarkm 45829088Smarkm switch(data[3]) { 45929088Smarkm case KRB_REJECT: /* Rejected (reason might follow) */ 46029088Smarkm strncpy((char *)buf, " REJECT ", buflen); 46129088Smarkm goto common; 46229088Smarkm 46329088Smarkm case KRB_ACCEPT: /* Accepted (name might follow) */ 46429088Smarkm strncpy((char *)buf, " ACCEPT ", buflen); 46529088Smarkm common: 46629088Smarkm BUMP(buf, buflen); 46729088Smarkm if (cnt <= 4) 46829088Smarkm break; 46929088Smarkm ADDC(buf, buflen, '"'); 47029088Smarkm for (i = 4; i < cnt; i++) 47129088Smarkm ADDC(buf, buflen, data[i]); 47229088Smarkm ADDC(buf, buflen, '"'); 47329088Smarkm ADDC(buf, buflen, '\0'); 47429088Smarkm break; 47529088Smarkm 47629088Smarkm case KRB_AUTH: /* Authentication data follows */ 47729088Smarkm strncpy((char *)buf, " AUTH", buflen); 47829088Smarkm goto common2; 47929088Smarkm 48029088Smarkm case KRB_CHALLENGE: 48129088Smarkm strncpy((char *)buf, " CHALLENGE", buflen); 48229088Smarkm goto common2; 48329088Smarkm 48429088Smarkm case KRB_RESPONSE: 48529088Smarkm strncpy((char *)buf, " RESPONSE", buflen); 48629088Smarkm goto common2; 48729088Smarkm 48829088Smarkm default: 48929088Smarkm sprintf(lbuf, " %d (unknown)", data[3]); 49029088Smarkm strncpy((char *)buf, lbuf, buflen); 49129088Smarkm common2: 49229088Smarkm BUMP(buf, buflen); 49329088Smarkm for (i = 4; i < cnt; i++) { 49429088Smarkm sprintf(lbuf, " %d", data[i]); 49529088Smarkm strncpy((char *)buf, lbuf, buflen); 49629088Smarkm BUMP(buf, buflen); 49729088Smarkm } 49829088Smarkm break; 49929088Smarkm } 50029088Smarkm} 50129088Smarkm 50229088Smarkm int 50329088Smarkmkerberos4_cksum(d, n) 50429088Smarkm unsigned char *d; 50529088Smarkm int n; 50629088Smarkm{ 50729088Smarkm int ck = 0; 50829088Smarkm 50929088Smarkm /* 51029088Smarkm * A comment is probably needed here for those not 51129088Smarkm * well versed in the "C" language. Yes, this is 51229088Smarkm * supposed to be a "switch" with the body of the 51329088Smarkm * "switch" being a "while" statement. The whole 51429088Smarkm * purpose of the switch is to allow us to jump into 51529088Smarkm * the middle of the while() loop, and then not have 51629088Smarkm * to do any more switch()s. 51729088Smarkm * 51829088Smarkm * Some compilers will spit out a warning message 51929088Smarkm * about the loop not being entered at the top. 52029088Smarkm */ 52129088Smarkm switch (n&03) 52229088Smarkm while (n > 0) { 52329088Smarkm case 0: 52429088Smarkm ck ^= (int)*d++ << 24; 52529088Smarkm --n; 52629088Smarkm case 3: 52729088Smarkm ck ^= (int)*d++ << 16; 52829088Smarkm --n; 52929088Smarkm case 2: 53029088Smarkm ck ^= (int)*d++ << 8; 53129088Smarkm --n; 53229088Smarkm case 1: 53329088Smarkm ck ^= (int)*d++; 53429088Smarkm --n; 53529088Smarkm } 53629088Smarkm return(ck); 53729088Smarkm} 53829088Smarkm#endif 53929088Smarkm 54029088Smarkm#ifdef notdef 54129088Smarkm 54229088Smarkmprkey(msg, key) 54329088Smarkm char *msg; 54429088Smarkm unsigned char *key; 54529088Smarkm{ 54629088Smarkm register int i; 54729088Smarkm printf("%s:", msg); 54829088Smarkm for (i = 0; i < 8; i++) 54929088Smarkm printf(" %3d", key[i]); 55029088Smarkm printf("\r\n"); 55129088Smarkm} 55229088Smarkm#endif 553