[thirdparty/glibc.git] / sunrpc / auth_des.c

/*
 * 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 <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>

#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;
}
Commit	Line	Data
800d775e	1	/*
a7ab6ec8	2	* Copyright (c) 2010, Oracle America, Inc.
cb636bb2	3	*
a7ab6ec8 UD	4	* Redistribution and use in source and binary forms, with or without
	5	* modification, are permitted provided that the following conditions are
	6	* met:
cb636bb2	7	*
a7ab6ec8 UD	8	* * Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* * Redistributions in binary form must reproduce the above
	11	* copyright notice, this list of conditions and the following
	12	* disclaimer in the documentation and/or other materials
	13	* provided with the distribution.
	14	* * Neither the name of the "Oracle America, Inc." nor the names of its
	15	* contributors may be used to endorse or promote products derived
	16	* from this software without specific prior written permission.
800d775e	17	*
a7ab6ec8 UD	18	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	19	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	20	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	21	* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	22	* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
	23	* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	24	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
	25	* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	26	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	27	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	28	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
800d775e UD	30	*/
	31	/*
	32	* auth_des.c, client-side implementation of DES authentication
	33	*/
	34
	35	#include <string.h>
	36	#include <rpc/des_crypt.h>
	37	#include <rpc/types.h>
	38	#include <rpc/auth.h>
	39	#include <rpc/auth_des.h>
	40	#include <rpc/xdr.h>
	41	#include <netinet/in.h> /* XXX: just to get htonl() and ntohl() */
	42	#include <sys/socket.h>
	43
	44	#define MILLION 1000000L
	45	#define RTIME_TIMEOUT 5 /* seconds to wait for sync */
	46
	47	#define AUTH_PRIVATE(auth) (struct ad_private *) auth->ah_private
	48	#define ALLOC(object_type) (object_type *) mem_alloc(sizeof(object_type))
	49	#define FREE(ptr, size) mem_free((char *)(ptr), (int) size)
	50	#define ATTEMPT(xdr_op) if (!(xdr_op)) return (FALSE)
	51
	52	#define debug(msg) /* printf("%s\n", msg) */
	53
800d775e UD	54
	55	/*
	56	* DES authenticator operations vector
	57	*/
800d775e UD	58	static void authdes_nextverf (AUTH *);
	59	static bool_t authdes_marshal (AUTH , XDR );
	60	static bool_t authdes_validate (AUTH , struct opaque_auth );
	61	static bool_t authdes_refresh (AUTH *);
	62	static void authdes_destroy (AUTH *);
f8afba91	63	static bool_t synchronize (struct sockaddr , struct rpc_timeval )
dfd2257a	64	internal_function;
800d775e	65
31d7b14c	66	static const struct auth_ops authdes_ops = {
800d775e UD	67	authdes_nextverf,
	68	authdes_marshal,
	69	authdes_validate,
	70	authdes_refresh,
	71	authdes_destroy
	72	};
	73
	74
	75	/*
	76	* This struct is pointed to by the ah_private field of an "AUTH *"
	77	*/
ee586e0e UD	78	struct ad_private {
ee586e0e UD	79	char ad_fullname; / client's full name */
7b57bfe5 UD	80	u_int ad_fullnamelen; /* length of name, rounded up */
7b57bfe5 UD	81	char ad_servername; / server's full name */
ee586e0e UD	82	u_int ad_servernamelen; /* length of name, rounded up */
	83	uint32_t ad_window; /* client specified window */
	84	bool_t ad_dosync; /* synchronize? */
	85	struct sockaddr ad_syncaddr; /* remote host to synch with */
f8afba91 UD	86	struct rpc_timeval ad_timediff; /* server's time - client's time */
f8afba91 UD	87	uint32_t ad_nickname; /* server's nickname for client */
ee586e0e UD	88	struct authdes_cred ad_cred; /* storage for credential */
ee586e0e UD	89	struct authdes_verf ad_verf; /* storage for verifier */
f8afba91	90	struct rpc_timeval ad_timestamp; /* timestamp sent */
ee586e0e	91	des_block ad_xkey; /* encrypted conversation key */
7b57bfe5	92	u_char ad_pkey[1024]; /* Servers actual public key */
ee586e0e	93	};
800d775e UD	94
	95
	96	/*
	97	* Create the client des authentication object
	98	*/
	99	AUTH *
9a0a462c	100	authdes_create (const char *servername, u_int window,
26a60f90	101	struct sockaddr syncaddr, des_block ckey)
800d775e UD	102	/* servername - network name of server */
	103	/* window - time to live */
	104	/* syncaddr - optional addr of host to sync with */
	105	/* ckey - optional conversation key to use */
	106	{
9cfe5381	107	char pkey_data[1024];
800d775e UD	108	netobj pkey;
	109
	110	if (!getpublickey (servername, pkey_data))
f8afba91	111	return NULL;
800d775e	112
9cfe5381 RM	113	pkey.n_bytes = pkey_data;
9cfe5381 RM	114	pkey.n_len = strlen (pkey_data) + 1;
7b57bfe5	115	return authdes_pk_create (servername, &pkey, window, syncaddr, ckey);
800d775e	116	}
7b57bfe5 UD	117	#ifdef EXPORT_RPC_SYMBOLS
	118	libc_hidden_def (authdes_create)
	119	#else
021db4be	120	libc_hidden_nolink_sunrpc (authdes_create, GLIBC_2_1)
7b57bfe5	121	#endif
800d775e UD	122
800d775e UD	123	AUTH *
26a60f90 UD	124	authdes_pk_create (const char servername, netobj pkey, u_int window,
26a60f90 UD	125	struct sockaddr syncaddr, des_block ckey)
800d775e UD	126	{
	127	AUTH *auth;
	128	struct ad_private *ad;
	129	char namebuf[MAXNETNAMELEN + 1];
	130
	131	/*
	132	* Allocate everything now
	133	*/
	134	auth = ALLOC (AUTH);
	135	ad = ALLOC (struct ad_private);
f8afba91 UD	136
	137	if (auth == NULL \|\| ad == NULL)
	138	{
	139	debug ("authdes_create: out of memory");
	140	goto failed;
	141	}
	142
dfd2257a	143	memset (ad, 0, sizeof (struct ad_private));
800d775e UD	144	memcpy (ad->ad_pkey, pkey->n_bytes, pkey->n_len);
	145	if (!getnetname (namebuf))
	146	goto failed;
	147	ad->ad_fullnamelen = RNDUP (strlen (namebuf));
	148	ad->ad_fullname = mem_alloc (ad->ad_fullnamelen + 1);
	149
	150	ad->ad_servernamelen = strlen (servername);
	151	ad->ad_servername = mem_alloc (ad->ad_servernamelen + 1);
	152
f8afba91	153	if (ad->ad_fullname == NULL \|\| ad->ad_servername == NULL)
800d775e UD	154	{
	155	debug ("authdes_create: out of memory");
	156	goto failed;
	157	}
	158
	159	/*
	160	* Set up private data
	161	*/
f8afba91 UD	162	memcpy (ad->ad_fullname, namebuf, ad->ad_fullnamelen + 1);
f8afba91 UD	163	memcpy (ad->ad_servername, servername, ad->ad_servernamelen + 1);
9a0a462c	164	ad->ad_timediff.tv_sec = ad->ad_timediff.tv_usec = 0;
800d775e UD	165	if (syncaddr != NULL)
	166	{
	167	ad->ad_syncaddr = *syncaddr;
	168	ad->ad_dosync = TRUE;
	169	}
	170	else
	171	ad->ad_dosync = FALSE;
	172
	173	ad->ad_window = window;
	174	if (ckey == NULL)
	175	{
	176	if (key_gendes (&auth->ah_key) < 0)
	177	{
	178	debug ("authdes_create: unable to gen conversation key");
1eab3551	179	goto failed;
800d775e UD	180	}
	181	}
	182	else
	183	auth->ah_key = *ckey;
	184
	185	/*
	186	* Set up auth handle
	187	*/
	188	auth->ah_cred.oa_flavor = AUTH_DES;
	189	auth->ah_verf.oa_flavor = AUTH_DES;
31d7b14c	190	auth->ah_ops = (struct auth_ops *) &authdes_ops;
800d775e UD	191	auth->ah_private = (caddr_t) ad;
	192
	193	if (!authdes_refresh (auth))
	194	goto failed;
	195
f8afba91	196	return auth;
800d775e UD	197
	198	failed:
	199	if (auth != NULL)
	200	FREE (auth, sizeof (AUTH));
	201	if (ad != NULL)
9a0a462c	202	{
9a0a462c UD	203	if (ad->ad_fullname != NULL)
	204	FREE (ad->ad_fullname, ad->ad_fullnamelen + 1);
	205	if (ad->ad_servername != NULL)
	206	FREE (ad->ad_servername, ad->ad_servernamelen + 1);
dfd2257a	207	FREE (ad, sizeof (struct ad_private));
9a0a462c	208	}
f8afba91	209	return NULL;
800d775e	210	}
7b57bfe5 UD	211	#ifdef EXPORT_RPC_SYMBOLS
	212	libc_hidden_def (authdes_pk_create)
	213	#else
021db4be	214	libc_hidden_nolink_sunrpc (authdes_pk_create, GLIBC_2_1)
7b57bfe5	215	#endif
800d775e UD	216
	217	/*
	218	* Implement the five authentication operations
	219	*/
	220
	221
	222	/*
	223	* 1. Next Verifier
	224	*/
	225	/ARGSUSED /
	226	static void
f8afba91	227	authdes_nextverf (AUTH *auth)
800d775e UD	228	{
	229	/* what the heck am I supposed to do??? */
	230	}
	231
	232
	233
	234	/*
	235	* 2. Marshal
	236	*/
	237	static bool_t
f8afba91	238	authdes_marshal (AUTH auth, XDR xdrs)
800d775e UD	239	{
	240	struct ad_private *ad = AUTH_PRIVATE (auth);
	241	struct authdes_cred *cred = &ad->ad_cred;
	242	struct authdes_verf *verf = &ad->ad_verf;
	243	des_block cryptbuf[2];
	244	des_block ivec;
	245	int status;
9cfe5381	246	int len;
f8afba91 UD	247	register int32_t *ixdr;
f8afba91 UD	248	struct timeval tval;
800d775e UD	249
	250	/*
	251	* Figure out the "time", accounting for any time difference
	252	* with the server if necessary.
	253	*/
f8afba91 UD	254	__gettimeofday (&tval, (struct timezone *) NULL);
	255	ad->ad_timestamp.tv_sec = tval.tv_sec + ad->ad_timediff.tv_sec;
	256	ad->ad_timestamp.tv_usec = tval.tv_usec + ad->ad_timediff.tv_usec;
800d775e UD	257	if (ad->ad_timestamp.tv_usec >= MILLION)
	258	{
	259	ad->ad_timestamp.tv_usec -= MILLION;
	260	ad->ad_timestamp.tv_sec += 1;
	261	}
	262
	263	/*
	264	* XDR the timestamp and possibly some other things, then
	265	* encrypt them.
ee586e0e	266	* XXX We have a real Year 2038 problem here.
800d775e	267	*/
f8afba91 UD	268	ixdr = (int32_t *) cryptbuf;
	269	IXDR_PUT_INT32 (ixdr, ad->ad_timestamp.tv_sec);
	270	IXDR_PUT_INT32 (ixdr, ad->ad_timestamp.tv_usec);
800d775e UD	271	if (ad->ad_cred.adc_namekind == ADN_FULLNAME)
800d775e UD	272	{
ee586e0e UD	273	IXDR_PUT_U_INT32 (ixdr, ad->ad_window);
ee586e0e UD	274	IXDR_PUT_U_INT32 (ixdr, ad->ad_window - 1);
800d775e UD	275	ivec.key.high = ivec.key.low = 0;
	276	status = cbc_crypt ((char ) &auth->ah_key, (char ) cryptbuf,
	277	2 * sizeof (des_block), DES_ENCRYPT \| DES_HW, (char *) &ivec);
	278	}
	279	else
f8afba91 UD	280	status = ecb_crypt ((char ) &auth->ah_key, (char ) cryptbuf,
	281	sizeof (des_block), DES_ENCRYPT \| DES_HW);
	282
800d775e UD	283	if (DES_FAILED (status))
	284	{
	285	debug ("authdes_marshal: DES encryption failure");
f8afba91	286	return FALSE;
800d775e UD	287	}
	288	ad->ad_verf.adv_xtimestamp = cryptbuf[0];
	289	if (ad->ad_cred.adc_namekind == ADN_FULLNAME)
	290	{
	291	ad->ad_cred.adc_fullname.window = cryptbuf[1].key.high;
	292	ad->ad_verf.adv_winverf = cryptbuf[1].key.low;
	293	}
	294	else
	295	{
	296	ad->ad_cred.adc_nickname = ad->ad_nickname;
	297	ad->ad_verf.adv_winverf = 0;
	298	}
	299
	300	/*
	301	* Serialize the credential and verifier into opaque
	302	* authentication data.
	303	*/
	304	if (ad->ad_cred.adc_namekind == ADN_FULLNAME)
f8afba91	305	len = ((1 + 1 + 2 + 1) * BYTES_PER_XDR_UNIT + ad->ad_fullnamelen);
800d775e	306	else
f8afba91	307	len = (1 + 1) * BYTES_PER_XDR_UNIT;
800d775e UD	308
	309	if ((ixdr = xdr_inline (xdrs, 2 * BYTES_PER_XDR_UNIT)) != NULL)
	310	{
ee586e0e UD	311	IXDR_PUT_INT32 (ixdr, AUTH_DES);
ee586e0e UD	312	IXDR_PUT_U_INT32 (ixdr, len);
800d775e UD	313	}
	314	else
	315	{
ee586e0e UD	316	ATTEMPT (xdr_putint32 (xdrs, &auth->ah_cred.oa_flavor));
ee586e0e UD	317	ATTEMPT (xdr_putint32 (xdrs, &len));
800d775e	318	}
7b57bfe5	319	ATTEMPT (xdr_authdes_cred (xdrs, cred));
800d775e UD	320
	321	len = (2 + 1) * BYTES_PER_XDR_UNIT;
	322	if ((ixdr = xdr_inline (xdrs, 2 * BYTES_PER_XDR_UNIT)) != NULL)
	323	{
ee586e0e UD	324	IXDR_PUT_INT32 (ixdr, AUTH_DES);
ee586e0e UD	325	IXDR_PUT_U_INT32 (ixdr, len);
800d775e UD	326	}
	327	else
	328	{
ee586e0e UD	329	ATTEMPT (xdr_putint32 (xdrs, &auth->ah_verf.oa_flavor));
ee586e0e UD	330	ATTEMPT (xdr_putint32 (xdrs, &len));
800d775e	331	}
7b57bfe5	332	ATTEMPT (xdr_authdes_verf (xdrs, verf));
f8afba91	333
ee586e0e	334	return TRUE;
800d775e UD	335	}
	336
	337
	338	/*
	339	* 3. Validate
	340	*/
	341	static bool_t
ee586e0e	342	authdes_validate (AUTH auth, struct opaque_auth rverf)
800d775e UD	343	{
	344	struct ad_private *ad = AUTH_PRIVATE (auth);
	345	struct authdes_verf verf;
	346	int status;
f8afba91	347	register uint32_t *ixdr;
800d775e UD	348
800d775e UD	349	if (rverf->oa_length != (2 + 1) * BYTES_PER_XDR_UNIT)
f8afba91	350	return FALSE;
800d775e	351
f8afba91 UD	352	ixdr = (uint32_t *) rverf->oa_base;
	353	verf.adv_xtimestamp.key.high = *ixdr++;
	354	verf.adv_xtimestamp.key.low = *ixdr++;
	355	verf.adv_int_u = ixdr++; / nickname not XDR'd ! */
800d775e UD	356
	357	/*
	358	* Decrypt the timestamp
	359	*/
	360	status = ecb_crypt ((char ) &auth->ah_key, (char ) &verf.adv_xtimestamp,
	361	sizeof (des_block), DES_DECRYPT \| DES_HW);
	362
	363	if (DES_FAILED (status))
	364	{
	365	debug ("authdes_validate: DES decryption failure");
ee586e0e	366	return FALSE;
800d775e UD	367	}
	368
	369	/*
	370	* xdr the decrypted timestamp
	371	*/
f8afba91 UD	372	ixdr = (uint32_t *) verf.adv_xtimestamp.c;
	373	verf.adv_timestamp.tv_sec = IXDR_GET_U_INT32 (ixdr) + 1;
	374	verf.adv_timestamp.tv_usec = IXDR_GET_U_INT32 (ixdr);
800d775e UD	375
	376	/*
	377	* validate
	378	*/
50304ef0	379	if (memcmp ((char ) &ad->ad_timestamp, (char ) &verf.adv_timestamp,
f8afba91	380	sizeof (struct rpc_timeval)) != 0)
800d775e UD	381	{
800d775e UD	382	debug ("authdes_validate: verifier mismatch\n");
ee586e0e	383	return FALSE;
800d775e UD	384	}
	385
	386	/*
	387	* We have a nickname now, let's use it
	388	*/
	389	ad->ad_nickname = verf.adv_nickname;
	390	ad->ad_cred.adc_namekind = ADN_NICKNAME;
ee586e0e	391	return TRUE;
800d775e UD	392	}
	393
	394	/*
	395	* 4. Refresh
	396	*/
	397	static bool_t
ee586e0e	398	authdes_refresh (AUTH *auth)
800d775e UD	399	{
	400	netobj pkey;
	401	struct ad_private *ad = AUTH_PRIVATE (auth);
	402	struct authdes_cred *cred = &ad->ad_cred;
	403
f8afba91	404	if (ad->ad_dosync && !synchronize (&ad->ad_syncaddr, &ad->ad_timediff))
800d775e UD	405	{
	406	/*
	407	* Hope the clocks are synced!
	408	*/
	409	ad->ad_timediff.tv_sec = ad->ad_timediff.tv_usec = 0;
	410	debug ("authdes_refresh: unable to synchronize with server");
	411	}
	412	ad->ad_xkey = auth->ah_key;
	413	pkey.n_bytes = (char *) (ad->ad_pkey);
	414	pkey.n_len = strlen ((char *) ad->ad_pkey) + 1;
	415	if (key_encryptsession_pk (ad->ad_servername, &pkey, &ad->ad_xkey) < 0)
	416	{
	417	debug ("authdes_create: unable to encrypt conversation key");
ee586e0e	418	return FALSE;
800d775e UD	419	}
	420	cred->adc_fullname.key = ad->ad_xkey;
	421	cred->adc_namekind = ADN_FULLNAME;
	422	cred->adc_fullname.name = ad->ad_fullname;
ee586e0e	423	return TRUE;
800d775e UD	424	}
	425
	426	/*
	427	* 5. Destroy
	428	*/
	429	static void
ee586e0e	430	authdes_destroy (AUTH *auth)
800d775e UD	431	{
	432	struct ad_private *ad = AUTH_PRIVATE (auth);
	433
	434	FREE (ad->ad_fullname, ad->ad_fullnamelen + 1);
	435	FREE (ad->ad_servername, ad->ad_servernamelen + 1);
	436	FREE (ad, sizeof (struct ad_private));
	437	FREE (auth, sizeof (AUTH));
	438	}
	439
	440	/*
	441	* Synchronize with the server at the given address, that is,
	442	* adjust timep to reflect the delta between our clocks
	443	*/
	444	static bool_t
dfd2257a	445	internal_function
f8afba91	446	synchronize (struct sockaddr syncaddr, struct rpc_timeval timep)
800d775e UD	447	{
800d775e UD	448	struct timeval mytime;
f8afba91	449	struct rpc_timeval timeout;
800d775e UD	450
	451	timeout.tv_sec = RTIME_TIMEOUT;
	452	timeout.tv_usec = 0;
	453	if (rtime ((struct sockaddr_in *) syncaddr, timep, &timeout) < 0)
ee586e0e	454	return FALSE;
800d775e	455
50304ef0	456	__gettimeofday (&mytime, (struct timezone *) NULL);
800d775e UD	457	timep->tv_sec -= mytime.tv_sec;
	458	if (mytime.tv_usec > timep->tv_usec)
	459	{
	460	timep->tv_sec -= 1;
	461	timep->tv_usec += MILLION;
	462	}
	463	timep->tv_usec -= mytime.tv_usec;
ee586e0e	464	return TRUE;
800d775e	465	}