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Diffstat (limited to '')
| -rw-r--r-- | cpukit/librpc/src/rpc/auth_des.c | 554 |
1 files changed, 554 insertions, 0 deletions
diff --git a/cpukit/librpc/src/rpc/auth_des.c b/cpukit/librpc/src/rpc/auth_des.c index e69de29bb2..87d55b67e7 100644 --- a/cpukit/librpc/src/rpc/auth_des.c +++ b/cpukit/librpc/src/rpc/auth_des.c @@ -0,0 +1,554 @@ +/* + * 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 |