diff options
Diffstat (limited to 'REORG.TODO/sunrpc/auth_des.c')
| -rw-r--r-- | REORG.TODO/sunrpc/auth_des.c | 467 |
1 files changed, 467 insertions, 0 deletions
diff --git a/REORG.TODO/sunrpc/auth_des.c b/REORG.TODO/sunrpc/auth_des.c new file mode 100644 index 0000000000..42d6b552f4 --- /dev/null +++ b/REORG.TODO/sunrpc/auth_des.c @@ -0,0 +1,467 @@ +/* + * Copyright (c) 2010, Oracle America, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * * Neither the name of the "Oracle America, Inc." nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +/* + * auth_des.c, client-side implementation of DES authentication + */ + +#include <string.h> +#include <stdint.h> +#include <rpc/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> +#include <shlib-compat.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 (AUTH *); +static bool_t authdes_marshal (AUTH *, XDR *); +static bool_t authdes_validate (AUTH *, struct opaque_auth *); +static bool_t authdes_refresh (AUTH *); +static void authdes_destroy (AUTH *); +static bool_t synchronize (struct sockaddr *, struct rpc_timeval *) + internal_function; + +static const 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 */ + uint32_t ad_window; /* client specified window */ + bool_t ad_dosync; /* synchronize? */ + struct sockaddr ad_syncaddr; /* remote host to synch with */ + struct rpc_timeval ad_timediff; /* server's time - client's time */ + uint32_t ad_nickname; /* server's nickname for client */ + struct authdes_cred ad_cred; /* storage for credential */ + struct authdes_verf ad_verf; /* storage for verifier */ + struct rpc_timeval ad_timestamp; /* timestamp sent */ + des_block ad_xkey; /* encrypted conversation key */ + u_char ad_pkey[1024]; /* Servers actual public key */ +}; + + +/* + * Create the client des authentication object + */ +AUTH * +authdes_create (const char *servername, u_int window, + struct sockaddr *syncaddr, des_block *ckey) + /* servername - network name of server */ + /* window - time to live */ + /* syncaddr - optional addr of host to sync with */ + /* ckey - optional conversation key to use */ +{ + char pkey_data[1024]; + netobj pkey; + + if (!getpublickey (servername, pkey_data)) + return NULL; + + pkey.n_bytes = pkey_data; + pkey.n_len = strlen (pkey_data) + 1; + return authdes_pk_create (servername, &pkey, window, syncaddr, ckey); +} +#ifdef EXPORT_RPC_SYMBOLS +libc_hidden_def (authdes_create) +#else +libc_hidden_nolink_sunrpc (authdes_create, GLIBC_2_1) +#endif + +AUTH * +authdes_pk_create (const char *servername, netobj *pkey, u_int window, + struct sockaddr *syncaddr, des_block *ckey) +{ + AUTH *auth; + struct ad_private *ad; + char namebuf[MAXNETNAMELEN + 1]; + + /* + * Allocate everything now + */ + auth = ALLOC (AUTH); + ad = ALLOC (struct ad_private); + + if (auth == NULL || ad == NULL) + { + debug ("authdes_create: out of memory"); + goto failed; + } + + memset (ad, 0, sizeof (struct ad_private)); + memcpy (ad->ad_pkey, pkey->n_bytes, pkey->n_len); + if (!getnetname (namebuf)) + goto failed; + 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 (ad->ad_fullname == NULL || ad->ad_servername == NULL) + { + debug ("authdes_create: out of memory"); + goto failed; + } + + /* + * Set up private data + */ + memcpy (ad->ad_fullname, namebuf, ad->ad_fullnamelen + 1); + memcpy (ad->ad_servername, servername, ad->ad_servernamelen + 1); + ad->ad_timediff.tv_sec = ad->ad_timediff.tv_usec = 0; + 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"); + 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 = (struct auth_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) + { + 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); + FREE (ad, sizeof (struct ad_private)); + } + return NULL; +} +#ifdef EXPORT_RPC_SYMBOLS +libc_hidden_def (authdes_pk_create) +#else +libc_hidden_nolink_sunrpc (authdes_pk_create, GLIBC_2_1) +#endif + +/* + * Implement the five authentication operations + */ + + +/* + * 1. Next Verifier + */ +/*ARGSUSED */ +static void +authdes_nextverf (AUTH *auth) +{ + /* what the heck am I supposed to do??? */ +} + + + +/* + * 2. Marshal + */ +static bool_t +authdes_marshal (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 int32_t *ixdr; + struct timeval tval; + + /* + * Figure out the "time", accounting for any time difference + * with the server if necessary. + */ + __gettimeofday (&tval, (struct timezone *) NULL); + ad->ad_timestamp.tv_sec = tval.tv_sec + ad->ad_timediff.tv_sec; + ad->ad_timestamp.tv_usec = tval.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. + * XXX We have a real Year 2038 problem here. + */ + ixdr = (int32_t *) cryptbuf; + IXDR_PUT_INT32 (ixdr, ad->ad_timestamp.tv_sec); + IXDR_PUT_INT32 (ixdr, ad->ad_timestamp.tv_usec); + if (ad->ad_cred.adc_namekind == ADN_FULLNAME) + { + IXDR_PUT_U_INT32 (ixdr, ad->ad_window); + IXDR_PUT_U_INT32 (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)) != NULL) + { + IXDR_PUT_INT32 (ixdr, AUTH_DES); + IXDR_PUT_U_INT32 (ixdr, len); + } + else + { + ATTEMPT (xdr_putint32 (xdrs, &auth->ah_cred.oa_flavor)); + ATTEMPT (xdr_putint32 (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)) != NULL) + { + IXDR_PUT_INT32 (ixdr, AUTH_DES); + IXDR_PUT_U_INT32 (ixdr, len); + } + else + { + ATTEMPT (xdr_putint32 (xdrs, &auth->ah_verf.oa_flavor)); + ATTEMPT (xdr_putint32 (xdrs, &len)); + } + ATTEMPT (xdr_authdes_verf (xdrs, verf)); + + return TRUE; +} + + +/* + * 3. Validate + */ +static bool_t +authdes_validate (AUTH *auth, struct opaque_auth *rverf) +{ + struct ad_private *ad = AUTH_PRIVATE (auth); + struct authdes_verf verf; + int status; + register uint32_t *ixdr; + + if (rverf->oa_length != (2 + 1) * BYTES_PER_XDR_UNIT) + return FALSE; + + ixdr = (uint32_t *) rverf->oa_base; + verf.adv_xtimestamp.key.high = *ixdr++; + verf.adv_xtimestamp.key.low = *ixdr++; + verf.adv_int_u = *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 = (uint32_t *) verf.adv_xtimestamp.c; + verf.adv_timestamp.tv_sec = IXDR_GET_U_INT32 (ixdr) + 1; + verf.adv_timestamp.tv_usec = IXDR_GET_U_INT32 (ixdr); + + /* + * validate + */ + if (memcmp ((char *) &ad->ad_timestamp, (char *) &verf.adv_timestamp, + sizeof (struct rpc_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) +{ + netobj pkey; + 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; + 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) +{ + 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 +internal_function +synchronize (struct sockaddr *syncaddr, struct rpc_timeval *timep) +{ + struct timeval mytime; + struct rpc_timeval timeout; + + timeout.tv_sec = RTIME_TIMEOUT; + timeout.tv_usec = 0; + if (rtime ((struct sockaddr_in *) syncaddr, timep, &timeout) < 0) + return FALSE; + + __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; +} |