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author | bde <bde@FreeBSD.org> | 1997-07-03 03:28:27 +0000 |
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committer | bde <bde@FreeBSD.org> | 1997-07-03 03:28:27 +0000 |
commit | c800b77e17a9db61b5cfedb8ada17ba33ba97d40 (patch) | |
tree | 90ddf44d2360a352ad20e3859f2a1e7fb8011ca1 /lib/librpc/secure_rpc/rpc/auth_des.c | |
parent | 73643318c3a441ade17ebffbe29ea00889ccbad3 (diff) | |
parent | e2f0a0f35c8c3ecbae359c67f0d5b3aac5ce43dc (diff) | |
download | FreeBSD-src-c800b77e17a9db61b5cfedb8ada17ba33ba97d40.zip FreeBSD-src-c800b77e17a9db61b5cfedb8ada17ba33ba97d40.tar.gz |
This commit was generated by cvs2svn to compensate for changes in r27180,
which included commits to RCS files with non-trunk default branches.
Diffstat (limited to 'lib/librpc/secure_rpc/rpc/auth_des.c')
-rw-r--r-- | lib/librpc/secure_rpc/rpc/auth_des.c | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/lib/librpc/secure_rpc/rpc/auth_des.c b/lib/librpc/secure_rpc/rpc/auth_des.c new file mode 100644 index 0000000..a757c49 --- /dev/null +++ b/lib/librpc/secure_rpc/rpc/auth_des.c @@ -0,0 +1,411 @@ +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)auth_des.c 2.2 88/07/29 4.0 RPCSRC; from 1.9 88/02/08 SMI"; +#endif +/* + * 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 <des_crypt.h> +#include <rpc/types.h> +#include <rpc/auth.h> +#include <rpc/auth_des.h> +#include <rpc/xdr.h> +#include <netinet/in.h> /* XXX: just to get htonl() and ntohl() */ +#include <sys/socket.h> + +#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 +}; + + +/* + * 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 */ + 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 */ +}; + + +/* + * 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]; + + /* + * Allocate everything now + */ + auth = ALLOC(AUTH); + ad = ALLOC(struct ad_private); + (void) getnetname(namebuf); + + ad->ad_fullnamelen = RNDUP(strlen(namebuf)); + ad->ad_fullname = mem_alloc(ad->ad_fullnamelen + 1); + + ad->ad_servernamelen = strlen(servername); + ad->ad_servername = 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); + 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); +} + +/* + * 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; + int len; + register long *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 = (long *)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, &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, &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; + + if (ad->ad_dosync && + !synchronize(&ad->ad_syncaddr, &ad->ad_timediff)) { + /* + * Hope the clocks are synced! + */ + ad->ad_timediff.tv_sec = ad->ad_timediff.tv_usec = 0; + debug("authdes_refresh: unable to synchronize with server"); + } + ad->ad_xkey = auth->ah_key; + if (key_encryptsession(ad->ad_servername, &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)); +} + + + +/* + * 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, &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); +} |