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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [librpc/] [src/] [rpc/] [auth_des.c] - Rev 593
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/* * Sun RPC is a product of Sun Microsystems, Inc. and is provided for * unrestricted use provided that this legend is included on all tape * media and as a part of the software program in whole or part. Users * may copy or modify Sun RPC without charge, but are not authorized * to license or distribute it to anyone else except as part of a product or * program developed by the user. * * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun RPC is provided with no support and without any obligation on the * part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 */ /* * Copyright (c) 1988 by Sun Microsystems, Inc. */ /* * auth_des.c, client-side implementation of DES authentication */ #include <string.h> #include <stdlib.h> #include <unistd.h> #include <sys/cdefs.h> #include <rpc/des_crypt.h> #include <rpc/types.h> #include <rpc/xdr.h> #include <rpc/auth.h> #include <rpc/auth_des.h> #include <netinet/in.h> /* XXX: just to get htonl() and ntohl() */ #include <sys/socket.h> #undef NIS #include <rpcsvc/nis.h> #if defined(LIBC_SCCS) && !defined(lint) /* from: static char sccsid[] = "@(#)auth_des.c 2.2 88/07/29 4.0 RPCSRC; from 1.9 88/02/08 SMI"; */ static const char rcsid[] = "$FreeBSD: src/lib/libc/rpc/auth_des.c,v 1.3 1999/08/28 00:00:32 peter Exp $"; #endif extern bool_t __rpc_get_time_offset __P(( struct timeval *, nis_server *, char *, char **, struct sockaddr_in * )); extern int rtime __P(( struct sockaddr_in *, struct timeval *, struct timeval *)); extern bool_t xdr_authdes_cred __P(( XDR *, struct authdes_cred * )); extern bool_t xdr_authdes_verf __P(( XDR *, struct authdes_verf * )); #define MILLION 1000000L #define RTIME_TIMEOUT 5 /* seconds to wait for sync */ #define AUTH_PRIVATE(auth) (struct ad_private *) auth->ah_private #define ALLOC(object_type) (object_type *) mem_alloc(sizeof(object_type)) #define FREE(ptr, size) mem_free((char *)(ptr), (int) size) #define ATTEMPT(xdr_op) if (!(xdr_op)) return (FALSE) #define debug(msg) /*printf("%s\n", msg) */ /* * DES authenticator operations vector */ static void authdes_nextverf(); static bool_t authdes_marshal(); static bool_t authdes_validate(); static bool_t authdes_refresh(); static void authdes_destroy(); static struct auth_ops authdes_ops = { authdes_nextverf, authdes_marshal, authdes_validate, authdes_refresh, authdes_destroy }; #ifdef foo static bool_t synchronize __P(( struct sockaddr *, struct timeval *)); #endif /* * This struct is pointed to by the ah_private field of an "AUTH *" */ struct ad_private { char *ad_fullname; /* client's full name */ u_int ad_fullnamelen; /* length of name, rounded up */ char *ad_servername; /* server's full name */ u_int ad_servernamelen; /* length of name, rounded up */ u_int ad_window; /* client specified window */ bool_t ad_dosync; /* synchronize? */ struct sockaddr ad_syncaddr; /* remote host to synch with */ char *ad_timehost; /* remote host to synch with */ struct timeval ad_timediff; /* server's time - client's time */ u_long ad_nickname; /* server's nickname for client */ struct authdes_cred ad_cred; /* storage for credential */ struct authdes_verf ad_verf; /* storage for verifier */ struct timeval ad_timestamp; /* timestamp sent */ des_block ad_xkey; /* encrypted conversation key */ u_char ad_pkey[1024]; /* Server's actual public key */ char *ad_netid; /* Timehost netid */ char *ad_uaddr; /* Timehost uaddr */ nis_server *ad_nis_srvr; /* NIS+ server struct */ }; /* * Create the client des authentication object */ AUTH * authdes_create(servername, window, syncaddr, ckey) char *servername; /* network name of server */ u_int window; /* time to live */ struct sockaddr *syncaddr; /* optional addr of host to sync with */ des_block *ckey; /* optional conversation key to use*/ { AUTH *auth; struct ad_private *ad; char namebuf[MAXNETNAMELEN+1]; u_char pkey_data[1024]; if (!getpublickey(servername, pkey_data)) return(NULL); /* * Allocate everything now */ auth = ALLOC(AUTH); ad = ALLOC(struct ad_private); (void) getnetname(namebuf); ad->ad_fullnamelen = RNDUP(strlen(namebuf)); ad->ad_fullname = (char *)mem_alloc(ad->ad_fullnamelen + 1); ad->ad_servernamelen = strlen(servername); ad->ad_servername = (char *)mem_alloc(ad->ad_servernamelen + 1); if (auth == NULL || ad == NULL || ad->ad_fullname == NULL || ad->ad_servername == NULL) { debug("authdes_create: out of memory"); goto failed; } /* * Set up private data */ bcopy(namebuf, ad->ad_fullname, ad->ad_fullnamelen + 1); bcopy(servername, ad->ad_servername, ad->ad_servernamelen + 1); bcopy(pkey_data, ad->ad_pkey, strlen(pkey_data) + 1); if (syncaddr != NULL) { ad->ad_syncaddr = *syncaddr; ad->ad_dosync = TRUE; } else { ad->ad_dosync = FALSE; } ad->ad_window = window; if (ckey == NULL) { if (key_gendes(&auth->ah_key) < 0) { debug("authdes_create: unable to gen conversation key"); return (NULL); } } else { auth->ah_key = *ckey; } /* * Set up auth handle */ auth->ah_cred.oa_flavor = AUTH_DES; auth->ah_verf.oa_flavor = AUTH_DES; auth->ah_ops = &authdes_ops; auth->ah_private = (caddr_t)ad; if (!authdes_refresh(auth)) { goto failed; } return (auth); failed: if (auth != NULL) FREE(auth, sizeof(AUTH)); if (ad != NULL) FREE(ad, sizeof(struct ad_private)); if (ad->ad_fullname != NULL) FREE(ad->ad_fullname, ad->ad_fullnamelen + 1); if (ad->ad_servername != NULL) FREE(ad->ad_servername, ad->ad_servernamelen + 1); return (NULL); } /* * Slightly modified version of authdes_create which takes the public key * of the server principal as an argument. This spares us a call to * getpublickey() which in the nameserver context can cause a deadlock. */ AUTH * authdes_pk_create(servername, pkey, window, timehost, ckey, srvr) char *servername; /* network name of server */ netobj *pkey; /* public key of server */ u_int window; /* time to live */ char *timehost; /* optional hostname to sync with */ des_block *ckey; /* optional conversation key to use */ nis_server *srvr; /* optional NIS+ server struct */ { AUTH *auth; struct ad_private *ad; char namebuf[MAXNETNAMELEN+1]; /* * Allocate everything now */ auth = ALLOC(AUTH); if (auth == NULL) { debug("authdes_pk_create: out of memory"); return (NULL); } ad = ALLOC(struct ad_private); if (ad == NULL) { debug("authdes_pk_create: out of memory"); goto failed; } ad->ad_fullname = ad->ad_servername = NULL; /* Sanity reasons */ ad->ad_timehost = NULL; ad->ad_netid = NULL; ad->ad_uaddr = NULL; ad->ad_nis_srvr = NULL; ad->ad_timediff.tv_sec = 0; ad->ad_timediff.tv_usec = 0; memcpy(ad->ad_pkey, pkey->n_bytes, pkey->n_len); if (!getnetname(namebuf)) goto failed; ad->ad_fullnamelen = RNDUP((u_int) strlen(namebuf)); ad->ad_fullname = (char *)mem_alloc(ad->ad_fullnamelen + 1); ad->ad_servernamelen = strlen(servername); ad->ad_servername = (char *)mem_alloc(ad->ad_servernamelen + 1); if (ad->ad_fullname == NULL || ad->ad_servername == NULL) { debug("authdes_pk_create: out of memory"); goto failed; } if (timehost != NULL) { ad->ad_timehost = (char *)mem_alloc(strlen(timehost) + 1); if (ad->ad_timehost == NULL) { debug("authdes_pk_create: out of memory"); goto failed; } memcpy(ad->ad_timehost, timehost, strlen(timehost) + 1); ad->ad_dosync = TRUE; } else if (srvr != NULL) { ad->ad_nis_srvr = srvr; /* transient */ ad->ad_dosync = TRUE; } else { ad->ad_dosync = FALSE; } memcpy(ad->ad_fullname, namebuf, ad->ad_fullnamelen + 1); memcpy(ad->ad_servername, servername, ad->ad_servernamelen + 1); ad->ad_window = window; if (ckey == NULL) { if (key_gendes(&auth->ah_key) < 0) { debug("authdes_pk_create: unable to gen conversation key"); goto failed; } } else { auth->ah_key = *ckey; } /* * Set up auth handle */ auth->ah_cred.oa_flavor = AUTH_DES; auth->ah_verf.oa_flavor = AUTH_DES; auth->ah_ops = &authdes_ops; auth->ah_private = (caddr_t)ad; if (!authdes_refresh(auth)) { goto failed; } ad->ad_nis_srvr = NULL; /* not needed any longer */ return (auth); failed: if (auth) FREE(auth, sizeof (AUTH)); if (ad) { if (ad->ad_fullname) FREE(ad->ad_fullname, ad->ad_fullnamelen + 1); if (ad->ad_servername) FREE(ad->ad_servername, ad->ad_servernamelen + 1); if (ad->ad_timehost) FREE(ad->ad_timehost, strlen(ad->ad_timehost) + 1); if (ad->ad_netid) free(ad->ad_netid); if (ad->ad_uaddr) free(ad->ad_uaddr); FREE(ad, sizeof (struct ad_private)); } return (NULL); } /* * Implement the five authentication operations */ /* * 1. Next Verifier */ /*ARGSUSED*/ static void authdes_nextverf(auth) AUTH *auth; { /* what the heck am I supposed to do??? */ } /* * 2. Marshal */ static bool_t authdes_marshal(auth, xdrs) AUTH *auth; XDR *xdrs; { struct ad_private *ad = AUTH_PRIVATE(auth); struct authdes_cred *cred = &ad->ad_cred; struct authdes_verf *verf = &ad->ad_verf; des_block cryptbuf[2]; des_block ivec; int status; long len; int32_t *ixdr; /* * Figure out the "time", accounting for any time difference * with the server if necessary. */ (void) gettimeofday(&ad->ad_timestamp, (struct timezone *)NULL); ad->ad_timestamp.tv_sec += ad->ad_timediff.tv_sec; ad->ad_timestamp.tv_usec += ad->ad_timediff.tv_usec; if (ad->ad_timestamp.tv_usec >= MILLION) { ad->ad_timestamp.tv_usec -= MILLION; ad->ad_timestamp.tv_sec += 1; } /* * XDR the timestamp and possibly some other things, then * encrypt them. */ ixdr = (int32_t *)cryptbuf; IXDR_PUT_LONG(ixdr, ad->ad_timestamp.tv_sec); IXDR_PUT_LONG(ixdr, ad->ad_timestamp.tv_usec); if (ad->ad_cred.adc_namekind == ADN_FULLNAME) { IXDR_PUT_U_LONG(ixdr, ad->ad_window); IXDR_PUT_U_LONG(ixdr, ad->ad_window - 1); ivec.key.high = ivec.key.low = 0; status = cbc_crypt((char *)&auth->ah_key, (char *)cryptbuf, 2*sizeof(des_block), DES_ENCRYPT | DES_HW, (char *)&ivec); } else { status = ecb_crypt((char *)&auth->ah_key, (char *)cryptbuf, sizeof(des_block), DES_ENCRYPT | DES_HW); } if (DES_FAILED(status)) { debug("authdes_marshal: DES encryption failure"); return (FALSE); } ad->ad_verf.adv_xtimestamp = cryptbuf[0]; if (ad->ad_cred.adc_namekind == ADN_FULLNAME) { ad->ad_cred.adc_fullname.window = cryptbuf[1].key.high; ad->ad_verf.adv_winverf = cryptbuf[1].key.low; } else { ad->ad_cred.adc_nickname = ad->ad_nickname; ad->ad_verf.adv_winverf = 0; } /* * Serialize the credential and verifier into opaque * authentication data. */ if (ad->ad_cred.adc_namekind == ADN_FULLNAME) { len = ((1 + 1 + 2 + 1)*BYTES_PER_XDR_UNIT + ad->ad_fullnamelen); } else { len = (1 + 1)*BYTES_PER_XDR_UNIT; } if ((ixdr = xdr_inline(xdrs, 2*BYTES_PER_XDR_UNIT))) { IXDR_PUT_LONG(ixdr, AUTH_DES); IXDR_PUT_LONG(ixdr, len); } else { ATTEMPT(xdr_putlong(xdrs, (long *)&auth->ah_cred.oa_flavor)); ATTEMPT(xdr_putlong(xdrs, &len)); } ATTEMPT(xdr_authdes_cred(xdrs, cred)); len = (2 + 1)*BYTES_PER_XDR_UNIT; if ((ixdr = xdr_inline(xdrs, 2*BYTES_PER_XDR_UNIT))) { IXDR_PUT_LONG(ixdr, AUTH_DES); IXDR_PUT_LONG(ixdr, len); } else { ATTEMPT(xdr_putlong(xdrs, (long *)&auth->ah_verf.oa_flavor)); ATTEMPT(xdr_putlong(xdrs, &len)); } ATTEMPT(xdr_authdes_verf(xdrs, verf)); return (TRUE); } /* * 3. Validate */ static bool_t authdes_validate(auth, rverf) AUTH *auth; struct opaque_auth *rverf; { struct ad_private *ad = AUTH_PRIVATE(auth); struct authdes_verf verf; int status; register u_long *ixdr; if (rverf->oa_length != (2 + 1) * BYTES_PER_XDR_UNIT) { return (FALSE); } ixdr = (u_long *)rverf->oa_base; verf.adv_xtimestamp.key.high = (u_long)*ixdr++; verf.adv_xtimestamp.key.low = (u_long)*ixdr++; verf.adv_int_u = (u_long)*ixdr++; /* nickname not XDR'd ! */ /* * Decrypt the timestamp */ status = ecb_crypt((char *)&auth->ah_key, (char *)&verf.adv_xtimestamp, sizeof(des_block), DES_DECRYPT | DES_HW); if (DES_FAILED(status)) { debug("authdes_validate: DES decryption failure"); return (FALSE); } /* * xdr the decrypted timestamp */ ixdr = (u_long *)verf.adv_xtimestamp.c; verf.adv_timestamp.tv_sec = IXDR_GET_LONG(ixdr) + 1; verf.adv_timestamp.tv_usec = IXDR_GET_LONG(ixdr); /* * validate */ if (bcmp((char *)&ad->ad_timestamp, (char *)&verf.adv_timestamp, sizeof(struct timeval)) != 0) { debug("authdes_validate: verifier mismatch\n"); return (FALSE); } /* * We have a nickname now, let's use it */ ad->ad_nickname = verf.adv_nickname; ad->ad_cred.adc_namekind = ADN_NICKNAME; return (TRUE); } /* * 4. Refresh */ static bool_t authdes_refresh(auth) AUTH *auth; { struct ad_private *ad = AUTH_PRIVATE(auth); struct authdes_cred *cred = &ad->ad_cred; netobj pkey; if (ad->ad_dosync && #ifdef old !synchronize(&ad->ad_syncaddr, &ad->ad_timediff)) { #else !__rpc_get_time_offset(&ad->ad_timediff,ad->ad_nis_srvr, ad->ad_timehost, &(ad->ad_uaddr), (struct sockaddr_in *)&(ad->ad_syncaddr))) { #endif /* * Hope the clocks are synced! */ ad->ad_timediff.tv_sec = ad->ad_timediff.tv_usec = 0; ad->ad_dosync = 0; debug("authdes_refresh: unable to synchronize with server"); } ad->ad_xkey = auth->ah_key; pkey.n_bytes = (char *)(ad->ad_pkey); pkey.n_len = strlen((char *)ad->ad_pkey) + 1; if (key_encryptsession_pk(ad->ad_servername, &pkey, &ad->ad_xkey) < 0) { debug("authdes_create: unable to encrypt conversation key"); return (FALSE); } cred->adc_fullname.key = ad->ad_xkey; cred->adc_namekind = ADN_FULLNAME; cred->adc_fullname.name = ad->ad_fullname; return (TRUE); } /* * 5. Destroy */ static void authdes_destroy(auth) AUTH *auth; { struct ad_private *ad = AUTH_PRIVATE(auth); FREE(ad->ad_fullname, ad->ad_fullnamelen + 1); FREE(ad->ad_servername, ad->ad_servernamelen + 1); FREE(ad, sizeof(struct ad_private)); FREE(auth, sizeof(AUTH)); } #ifdef old /* * Synchronize with the server at the given address, that is, * adjust timep to reflect the delta between our clocks */ static bool_t synchronize(syncaddr, timep) struct sockaddr *syncaddr; struct timeval *timep; { struct timeval mytime; struct timeval timeout; timeout.tv_sec = RTIME_TIMEOUT; timeout.tv_usec = 0; if (rtime((struct sockaddr_in *)syncaddr, timep, NULL /*&timeout*/) < 0) { return (FALSE); } (void) gettimeofday(&mytime, (struct timezone *)NULL); timep->tv_sec -= mytime.tv_sec; if (mytime.tv_usec > timep->tv_usec) { timep->tv_sec -= 1; timep->tv_usec += MILLION; } timep->tv_usec -= mytime.tv_usec; return (TRUE); } #endif
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