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Diffstat (limited to 'server/kopt.c.auth')
| -rw-r--r-- | server/kopt.c.auth | 631 |
1 files changed, 0 insertions, 631 deletions
diff --git a/server/kopt.c.auth b/server/kopt.c.auth deleted file mode 100644 index 99fe48e..0000000 --- a/server/kopt.c.auth +++ /dev/null @@ -1,631 +0,0 @@ -/* - * $Source$ - * $Author$ - * - * Copyright 1985, 1986, 1987, 1988, 1990, 1991 by the Massachusetts - * Institute of Technology. - * - * For copying and distribution information, please see the file - * <mit-copyright.h>. - */ - -/* - * This includes code taken from: - * Kerberos: rd_req.c,v 4.16 89/03/22 14:52:06 jtkohl Exp - * Kerberos: prot.h,v 4.13 89/01/24 14:27:22 jtkohl Exp - * Kerberos: krb_conf.h,v 4.0 89/01/23 09:59:27 jtkohl Exp - */ - -#ifndef lint -#ifndef SABER -static char *rcsid_rd_req_c = - "$Id$"; -#endif /* lint */ -#endif /* SABER */ - -#ifdef KERBEROS -#ifndef NOENCRYPTION - -#include <zephyr/mit-copyright.h> -#include <zephyr/zephyr.h> -#include <stdio.h> -#include <krb.h> -#include "zserver.h" - -/* Byte ordering */ -static int krbONE = 1; -#define HOST_BYTE_ORDER (* (char *) &krbONE) - -#define KRB_PROT_VERSION 4 - -/* Message types , always leave lsb for byte order */ - -#define AUTH_MSG_KDC_REQUEST 1<<1 -#define AUTH_MSG_KDC_REPLY 2<<1 -#define AUTH_MSG_APPL_REQUEST 3<<1 -#define AUTH_MSG_APPL_REQUEST_MUTUAL 4<<1 -#define AUTH_MSG_ERR_REPLY 5<<1 -#define AUTH_MSG_PRIVATE 6<<1 -#define AUTH_MSG_SAFE 7<<1 -#define AUTH_MSG_APPL_ERR 8<<1 -#define AUTH_MSG_DIE 63<<1 - -/* values for kerb error codes */ - -#define KERB_ERR_OK 0 -#define KERB_ERR_NAME_EXP 1 -#define KERB_ERR_SERVICE_EXP 2 -#define KERB_ERR_AUTH_EXP 3 -#define KERB_ERR_PKT_VER 4 -#define KERB_ERR_NAME_MAST_KEY_VER 5 -#define KERB_ERR_SERV_MAST_KEY_VER 6 -#define KERB_ERR_BYTE_ORDER 7 -#define KERB_ERR_PRINCIPAL_UNKNOWN 8 -#define KERB_ERR_PRINCIPAL_NOT_UNIQUE 9 -#define KERB_ERR_NULL_KEY 10 - -#include <sys/time.h> -#include <string.h> - -extern int krb_ap_req_debug; - -extern struct timeval t_local; - -/* - * Keep the following information around for subsequent calls - * to this routine by the same server using the same key. - */ - -static Sched serv_ksched; /* Key sched to decrypt ticket */ -static des_cblock serv_key; /* Initialization vector */ - -static int st_kvno; /* version number for this key */ -static char st_rlm[REALM_SZ]; /* server's realm */ -static char st_nam[ANAME_SZ]; /* service name */ -static char st_inst[INST_SZ]; /* server's instance */ - -/* - * Cache of key schedules - */ -#define HASH_SIZE_1 255 /* not a power of 2 */ -#define HASH_SIZE_2 3 -static unsigned long last_use; -typedef struct { - unsigned long last_time_used; - des_cblock key; - Sched schedule; -} KeySchedRec; -static KeySchedRec scheds[HASH_SIZE_1][HASH_SIZE_2]; - -#ifdef __STDC__ -Sched* check_key_sched_cache (des_cblock key) -#else -Sched* check_key_sched_cache (key) - des_cblock key; -#endif -{ - unsigned int hash_value = key[0] + key[1] * 256; - KeySchedRec *rec = scheds[hash_value % HASH_SIZE_1]; - int i; - - for (i = HASH_SIZE_2 - 1; i >= 0; i--) - if (rec[i].last_time_used - && key[0] == rec[i].key[0] - && !memcmp (key, rec[i].key, sizeof (des_cblock))) { - rec[i].last_time_used = last_use++; - return &rec[i].schedule; - } - return 0; -} - -#ifdef __STDC__ -void add_to_key_sched_cache (des_cblock key, Sched* sched) -#else -void add_to_key_sched_cache (key, sched) - des_cblock key; - Sched* sched; -#endif -{ - unsigned int hash_value = key[0] + key[1] * 256; - KeySchedRec *rec = scheds[hash_value % HASH_SIZE_1]; - int i, oldest = HASH_SIZE_2 - 1; - - for (i = HASH_SIZE_2 - 1; i >= 0; i--) { - if (rec[i].last_time_used == 0) { - oldest = i; - break; - } - if (rec[i].last_time_used < rec[oldest].last_time_used) - oldest = i; - } - (void) memcpy (rec[oldest].key, key, sizeof (des_cblock)); - rec[oldest].schedule = *sched; - rec[oldest].last_time_used = last_use++; -} - -/* - * This file contains two functions. krb_set_key() takes a DES - * key or password string and returns a DES key (either the original - * key, or the password converted into a DES key) and a key schedule - * for it. - * - * krb_rd_req() reads an authentication request and returns information - * about the identity of the requestor, or an indication that the - * identity information was not authentic. - */ - -/* - * krb_set_key() takes as its first argument either a DES key or a - * password string. The "cvt" argument indicates how the first - * argument "key" is to be interpreted: if "cvt" is null, "key" is - * taken to be a DES key; if "cvt" is non-null, "key" is taken to - * be a password string, and is converted into a DES key using - * string_to_key(). In either case, the resulting key is returned - * in the external variable "serv_key". A key schedule is - * generated for "serv_key" and returned in the external variable - * "serv_ksched". - * - * This routine returns the return value of des_key_sched. - * - * krb_set_key() needs to be in the same .o file as krb_rd_req() so that - * the key set by krb_set_key() is available in private storage for - * krb_rd_req(). - */ - -int -krb_set_key(key,cvt) - char *key; - int cvt; -{ -#ifdef NOENCRYPTION - (void) memset(serv_key, 0, sizeof(serv_key)); - return KSUCCESS; -#else /* Encrypt */ - Sched *s; - int ret; - - if (cvt) - string_to_key(key,serv_key); - else - (void) memcpy((char *)serv_key,key,8); - - s = check_key_sched_cache (serv_key); - if (s) { - serv_ksched = *s; - return 0; - } - ret = des_key_sched (serv_key, serv_ksched.s); - add_to_key_sched_cache (serv_key, &serv_ksched); - return ret; -#endif /* NOENCRYPTION */ -} - - -/* - * krb_rd_req() takes an AUTH_MSG_APPL_REQUEST or - * AUTH_MSG_APPL_REQUEST_MUTUAL message created by krb_mk_req(), - * checks its integrity and returns a judgement as to the requestor's - * identity. - * - * The "authent" argument is a pointer to the received message. - * The "service" and "instance" arguments name the receiving server, - * and are used to get the service's ticket to decrypt the ticket - * in the message, and to compare against the server name inside the - * ticket. "from_addr" is the network address of the host from which - * the message was received; this is checked against the network - * address in the ticket. If "from_addr" is zero, the check is not - * performed. "ad" is an AUTH_DAT structure which is - * filled in with information about the sender's identity according - * to the authenticator and ticket sent in the message. Finally, - * "fn" contains the name of the file containing the server's key. - * (If "fn" is NULL, the server's key is assumed to have been set - * by krb_set_key(). If "fn" is the null string ("") the default - * file KEYFILE, defined in "krb.h", is used.) - * - * krb_rd_req() returns RD_AP_OK if the authentication information - * was genuine, or one of the following error codes (defined in - * "krb.h"): - * - * RD_AP_VERSION - wrong protocol version number - * RD_AP_MSG_TYPE - wrong message type - * RD_AP_UNDEC - couldn't decipher the message - * RD_AP_INCON - inconsistencies found - * RD_AP_BADD - wrong network address - * RD_AP_TIME - client time (in authenticator) - * too far off server time - * RD_AP_NYV - Kerberos time (in ticket) too - * far off server time - * RD_AP_EXP - ticket expired - * - * For the message format, see krb_mk_req(). - * - * Mutual authentication is not implemented. - */ - -krb_rd_req(authent,service,instance,from_addr,ad,fn) - register KTEXT authent; /* The received message */ - char *service; /* Service name */ - char *instance; /* Service instance */ - long from_addr; /* Net address of originating host */ - AUTH_DAT *ad; /* Structure to be filled in */ - char *fn; /* Filename to get keys from */ -{ - KTEXT_ST ticket; /* Temp storage for ticket */ - KTEXT tkt = &ticket; - KTEXT_ST req_id_st; /* Temp storage for authenticator */ - register KTEXT req_id = &req_id_st; - - char realm[REALM_SZ]; /* Realm of issuing kerberos */ - Sched seskey_sched, *sched; /* Key sched for session key */ - unsigned char skey[KKEY_SZ]; /* Session key from ticket */ - char sname[SNAME_SZ]; /* Service name from ticket */ - char iname[INST_SZ]; /* Instance name from ticket */ - char r_aname[ANAME_SZ]; /* Client name from authenticator */ - char r_inst[INST_SZ]; /* Client instance from authenticator */ - char r_realm[REALM_SZ]; /* Client realm from authenticator */ - unsigned int r_time_ms; /* Fine time from authenticator */ - unsigned long r_time_sec; /* Coarse time from authenticator */ - register char *ptr; /* For stepping through */ - unsigned long delta_t; /* Time in authenticator - local time */ - long tkt_age; /* Age of ticket */ - int swap_bytes; /* Need to swap bytes? */ - int mutual; /* Mutual authentication requested? */ - unsigned char s_kvno; /* Version number of the server's key - * Kerberos used to encrypt ticket */ - int status; - - if (authent->length <= 0) - return(RD_AP_MODIFIED); - - ptr = (char *) authent->dat; - - /* get msg version, type and byte order, and server key version */ - - /* check version */ - if (KRB_PROT_VERSION != (unsigned int) *ptr++) - return(RD_AP_VERSION); - - /* byte order */ - swap_bytes = 0; - if ((*ptr & 1) != HOST_BYTE_ORDER) - swap_bytes++; - - /* check msg type */ - mutual = 0; - switch (*ptr++ & ~1) { - case AUTH_MSG_APPL_REQUEST: - break; - case AUTH_MSG_APPL_REQUEST_MUTUAL: - mutual++; - break; - default: - return(RD_AP_MSG_TYPE); - } - -#ifdef lint - /* XXX mutual is set but not used; why??? */ - /* this is a crock to get lint to shut up */ - if (mutual) - mutual = 0; -#endif /* lint */ - s_kvno = *ptr++; /* get server key version */ - (void) strcpy(realm,ptr); /* And the realm of the issuing KDC */ - ptr += strlen(ptr) + 1; /* skip the realm "hint" */ - - /* - * If "fn" is NULL, key info should already be set; don't - * bother with ticket file. Otherwise, check to see if we - * already have key info for the given server and key version - * (saved in the static st_* variables). If not, go get it - * from the ticket file. If "fn" is the null string, use the - * default ticket file. - */ - if (fn && (strcmp(st_nam,service) || strcmp(st_inst,instance) || - strcmp(st_rlm,realm) || (st_kvno != s_kvno))) { - if (*fn == 0) fn = KEYFILE; - st_kvno = s_kvno; -#ifndef NOENCRYPTION - if (read_service_key(service,instance,realm,(int) s_kvno, - fn,(char *)skey)) - return(RD_AP_UNDEC); - if ((status = krb_set_key((char *)skey,0)) != 0) - return(status); -#endif /* !NOENCRYPTION */ - (void) strcpy(st_rlm,realm); - (void) strcpy(st_nam,service); - (void) strcpy(st_inst,instance); - } - - /* Get ticket from authenticator */ - tkt->length = (int) *ptr++; - if ((tkt->length + (ptr+1 - (char *) authent->dat)) > authent->length) - return(RD_AP_MODIFIED); - (void) memcpy((char *)(tkt->dat),ptr+1,tkt->length); - - if (krb_ap_req_debug) - log("ticket->length: %d",tkt->length); - -#ifndef NOENCRYPTION - /* Decrypt and take apart ticket */ -#endif - - if (decomp_ticket(tkt,&ad->k_flags,ad->pname,ad->pinst,ad->prealm, - &(ad->address),ad->session, &(ad->life), - &(ad->time_sec),sname,iname,serv_key,serv_ksched.s)) - return(RD_AP_UNDEC); - - if (krb_ap_req_debug) { - log("Ticket Contents."); - log(" Aname: %s.%s",ad->pname, - ((int)*(ad->prealm) ? ad->prealm : "Athena")); - log(" Service: %s%s%s",sname,((int)*iname ? "." : ""),iname); - } - - /* Extract the authenticator */ - req_id->length = (int) *(ptr++); - if ((req_id->length + (ptr + tkt->length - (char *) authent->dat)) > - authent->length) - return(RD_AP_MODIFIED); - (void) memcpy((char *)(req_id->dat),ptr + tkt->length, req_id->length); - -#ifndef NOENCRYPTION - /* And decrypt it with the session key from the ticket */ - if (krb_ap_req_debug) log("About to decrypt authenticator"); - sched = check_key_sched_cache (ad->session); - if (!sched) { - sched = &seskey_sched; - key_sched (ad->session, seskey_sched.s); - add_to_key_sched_cache (ad->session, &seskey_sched); - } - /* can't do much to optimize this... */ - pcbc_encrypt((C_Block *)req_id->dat,(C_Block *)req_id->dat, - (long) req_id->length, sched->s, ad->session,DES_DECRYPT); - if (krb_ap_req_debug) log("Done."); -#endif /* NOENCRYPTION */ - -#define check_ptr() if ((ptr - (char *) req_id->dat) > req_id->length) return(RD_AP_MODIFIED); - - ptr = (char *) req_id->dat; - (void) strcpy(r_aname,ptr); /* Authentication name */ - ptr += strlen(r_aname)+1; - check_ptr(); - (void) strcpy(r_inst,ptr); /* Authentication instance */ - ptr += strlen(r_inst)+1; - check_ptr(); - (void) strcpy(r_realm,ptr); /* Authentication name */ - ptr += strlen(r_realm)+1; - check_ptr(); - (void) memcpy((char *)&ad->checksum,ptr,4); /* Checksum */ - ptr += 4; - check_ptr(); - if (swap_bytes) swap_u_long(ad->checksum); - r_time_ms = *(ptr++); /* Time (fine) */ -#ifdef lint - /* XXX r_time_ms is set but not used. why??? */ - /* this is a crock to get lint to shut up */ - if (r_time_ms) - r_time_ms = 0; -#endif /* lint */ - check_ptr(); - /* assume sizeof(r_time_sec) == 4 ?? */ - (void) memcpy((char *)&r_time_sec,ptr,4); /* Time (coarse) */ - if (swap_bytes) swap_u_long(r_time_sec); - - /* Check for authenticity of the request */ - if (krb_ap_req_debug) - log("Pname: %s %s",ad->pname,r_aname); - if (strcmp(ad->pname,r_aname) != 0) - return(RD_AP_INCON); - if (strcmp(ad->pinst,r_inst) != 0) - return(RD_AP_INCON); - if (krb_ap_req_debug) - log("Realm: %s %s",ad->prealm,r_realm); - if ((strcmp(ad->prealm,r_realm) != 0)) - return(RD_AP_INCON); - - if (krb_ap_req_debug) - log("Address: %d %d",ad->address,from_addr); - if (from_addr && (ad->address != from_addr)) - return(RD_AP_BADD); - - delta_t = abs((int)(t_local.tv_sec - r_time_sec)); - if (delta_t > CLOCK_SKEW) { - (void) gettimeofday(&t_local, (struct timezone *)0); - delta_t = abs((int)(t_local.tv_sec - r_time_sec)); - if (delta_t > CLOCK_SKEW) { - if (krb_ap_req_debug) - log("Time out of range: %d - %d = %d", - t_local.tv_sec,r_time_sec,delta_t); - return(RD_AP_TIME); - } - } - - /* Now check for expiration of ticket */ - - tkt_age = t_local.tv_sec - ad->time_sec; - if (krb_ap_req_debug) - log("Time: %d Issue Date: %d Diff: %d Life %x", - t_local.tv_sec,ad->time_sec,tkt_age,ad->life); - - if (t_local.tv_sec < ad->time_sec) { - if ((ad->time_sec - t_local.tv_sec) > CLOCK_SKEW) - return(RD_AP_NYV); - } - else if ((t_local.tv_sec - ad->time_sec) > 5 * 60 * ad->life) - return(RD_AP_EXP); - - /* All seems OK */ - ad->reply.length = 0; - - return(RD_AP_OK); -} -#endif /* NOENCRYPTION */ - -int krb_find_ticket(authent, ticket) - KTEXT authent, ticket; -{ - register char *ptr; /* For stepping through */ - - /* Check for bogus length. */ - if (authent->length <= 0) - return(RD_AP_MODIFIED); - - ptr = (char *) authent->dat; - - /* check version */ - if (KRB_PROT_VERSION != (unsigned int) *ptr++) - return(RD_AP_VERSION); - - /* Make sure msg type is ok. */ - switch (*ptr++ & ~1) { - case AUTH_MSG_APPL_REQUEST: - case AUTH_MSG_APPL_REQUEST_MUTUAL: - break; - default: - return(RD_AP_MSG_TYPE); - } - - *ptr++; /* skip server key version */ - ptr += strlen(ptr) + 1; /* skip the realm "hint" */ - - /* Get ticket from authenticator */ - ticket->length = (int) *ptr++; - if ((ticket->length + (ptr+1 - (char *) authent->dat)) > authent->length) - return(RD_AP_MODIFIED); - (void) memcpy((char *)(ticket->dat),ptr+1,ticket->length); - - return RD_AP_OK; -} - -static char local_realm_buffer[REALM_SZ+1]; - -krb_get_lrealm(r,n) - char *r; - int n; -{ - FILE *cnffile, *fopen(); - - if (n > 1) - return(KFAILURE); /* Temporary restriction */ - - if (local_realm_buffer[0]) { - strcpy (r, local_realm_buffer); - return KSUCCESS; - } - - if ((cnffile = fopen(KRB_CONF, "r")) == NULL) { - if (n == 1) { - (void) strcpy(r, KRB_REALM); - return(KSUCCESS); - } - else - return(KFAILURE); - } - - if (fscanf(cnffile,"%s",r) != 1) { - (void) fclose(cnffile); - return(KFAILURE); - } - (void) fclose(cnffile); - return(KSUCCESS); -} - -#endif /* KERBEROS */ - -#ifdef ibm032 - -#if defined (__GNUC__) || defined (__HIGHC__) -#ifdef __HIGHC__ -#define asm _ASM -#endif - -/* - * Copyright (C) 1990 by the Massachusetts Institute of Technology - * - * Permission to use, copy, modify, and distribute this software and its - * documentation for any purpose and without fee is hereby granted. - */ - -void asm_wrapper_kopt_c () { - /* - * Multiply routine. The C library routine tries to optimize around - * the multiply-step instruction, which was slower in earlier versions - * of the processor; this is no longer useful. Derived from assembly - * code written by John Carr. - */ - - /* data section */ - asm(".data\n.align 2"); - asm(".globl _ulmul$$ \n _ulmul$$:"); - asm(".globl _lmul$$ \n _lmul$$: .long lmul$$"); - /* text section */ - asm(".text \n .align 1"); - asm(".globl lmul$$ \n lmul$$:"); - asm(".globl ulmul$$ \n ulmul$$:"); - asm(".globl _.lmul$$ \n _.lmul$$:"); - asm(".globl _.ulmul$$ \n _.ulmul$$:"); - asm(" s r0,r0 \n mts r10,r2"); /* set up multiply, and go: */ - asm(" m r0,r3 \n m r0,r3 \n m r0,r3 \n m r0,r3"); /* execute 4 steps */ - asm(" m r0,r3 \n m r0,r3 \n m r0,r3 \n m r0,r3"); /* execute 4 steps */ - asm(" m r0,r3 \n m r0,r3 \n m r0,r3 \n m r0,r3"); /* execute 4 steps */ - asm(" m r0,r3 \n m r0,r3 \n m r0,r3 \n m r0,r3"); /* execute 4 steps */ - asm(" brx r15 \n mfs r10,r2"); /* return result */ - asm(" .long 0xdf02df00"); /* for debugging */ - -#ifdef USE_LIBC_STRLEN - } -#else - /* Note- do not use this version of strlen when compiling with -g; -g */ - /* causes extra no-ops to be inserted between instructions, which cause */ - /* the delayed branch instructions to fail. */ - - /* - * Fast strlen, with optional trapping of null pointers. Also from - * John Carr. - */ - /* data */ - asm(".data\n.align 2"); - asm(".globl _strlen \n _strlen: .long _.strlen"); - /* text */ - asm(".text\n.align 1"); - asm(".globl _.strlen \n _.strlen:"); -#if 1 - asm(" ti 2,r2,0"); /* trap if r2 is NULL */ -#endif - asm(" ls r4,0(r2)"); - asm(" mr r0,r2"); - asm(" nilz r3,r2,3"); - asm(" beqx 0f"); - asm(" nilo r2,r2,0xfffc"); /* clear low bits */ - asm(" sis r3,2"); /* test appropriate bytes of 1st word */ - asm(" jeq 2f"); /* s & 3 == 2 */ - asm(" jm 1f"); /* s & 3 == 1 */ - asm(" j 3f"); /* s & 3 == 3 */ - asm("0: srpi16 r4,8"); /* byte 0 */ - asm(" jeq 4f"); - asm("1: niuz r5,r4,0xff"); /* byte 1 */ - asm(" jeq 5f"); - asm("2: nilz r5,r4,0xff00"); /* byte 2 */ - asm(" jeq 6f"); - asm("3: sli16 r4,8"); /* byte 3 */ - asm(" jeq 7f"); - asm(" ls r4,4(r2)"); /* get next word and continue */ - asm(" bx 0b"); - asm(" inc r2,4"); - asm("4: brx r15"); /* byte 0 is zero */ - asm(" s r2,r0"); - asm("5: s r2,r0"); /* byte 1 is zero */ - asm(" brx r15"); - asm(" inc r2,1"); - asm("6: s r2,r0"); /* byte 2 is zero */ - asm(" brx r15"); - asm(" inc r2,2"); - asm("7: s r2,r0"); /* byte 3 is zero */ - asm(" brx r15"); - asm(" inc r2,3"); - asm(" .long 0xdf02df00"); /* trace table */ -} -#endif /* USE_LIBC_STRLEN */ -#endif /* __GNUC__ || __HIGHC__ */ -#endif /* ibm032 */ - |