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

#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 <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) */

extern int rtime (struct sockaddr_in *, struct timeval *, struct timeval *);
extern bool_t xdr_authdes_cred (XDR *, struct authdes_cred *);
extern bool_t xdr_authdes_verf (XDR *, struct authdes_verf *);

/*
 * 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 timeval *)
     internal_function;

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 */
    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 */
{
  u_char pkey_data[1024];
  netobj pkey;

  if (!getpublickey (servername, pkey_data))
    return (NULL);

  pkey.n_bytes = (char *) pkey_data;
  pkey.n_len = strlen ((char *) pkey_data) + 1;
  return authdes_pk_create (servername, &pkey, window, syncaddr, ckey);
}

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);
  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 (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);
  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");
	  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)
    {
      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);
}

/*
 * 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 long *ixdr;

  /*
   * Figure out the "time", accounting for any time difference
   * with the server if necessary.
   */
  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)) != NULL)
    {
      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, (long *)&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_LONG (ixdr, AUTH_DES);
      IXDR_PUT_LONG (ixdr, len);
    }
  else
    {
      ATTEMPT (xdr_putlong (xdrs, (long *)&auth->ah_verf.oa_flavor));
      ATTEMPT (xdr_putlong (xdrs, (long *)&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 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)
{
  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 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);

  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 UD	1	#if defined(LIBC_SCCS) && !defined(lint)
	2	static char sccsid[] = "@(#)auth_des.c 2.2 88/07/29 4.0 RPCSRC; from 1.9 88/02/08 SMI";
	3	#endif
	4	/*
	5	* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
	6	* unrestricted use provided that this legend is included on all tape
	7	* media and as a part of the software program in whole or part. Users
	8	* may copy or modify Sun RPC without charge, but are not authorized
	9	* to license or distribute it to anyone else except as part of a product or
	10	* program developed by the user.
	11	*
	12	* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
	13	* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
	14	* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
	15	*
	16	* Sun RPC is provided with no support and without any obligation on the
	17	* part of Sun Microsystems, Inc. to assist in its use, correction,
	18	* modification or enhancement.
	19	*
	20	* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
	21	* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
	22	* OR ANY PART THEREOF.
	23	*
	24	* In no event will Sun Microsystems, Inc. be liable for any lost revenue
	25	* or profits or other special, indirect and consequential damages, even if
	26	* Sun has been advised of the possibility of such damages.
	27	*
	28	* Sun Microsystems, Inc.
	29	* 2550 Garcia Avenue
	30	* Mountain View, California 94043
	31	*/
	32	/*
	33	* Copyright (c) 1988 by Sun Microsystems, Inc.
	34	*/
	35	/*
	36	* auth_des.c, client-side implementation of DES authentication
	37	*/
	38
	39	#include <string.h>
	40	#include <rpc/des_crypt.h>
	41	#include <rpc/types.h>
	42	#include <rpc/auth.h>
	43	#include <rpc/auth_des.h>
	44	#include <rpc/xdr.h>
	45	#include <netinet/in.h> /* XXX: just to get htonl() and ntohl() */
	46	#include <sys/socket.h>
	47
	48	#define MILLION 1000000L
	49	#define RTIME_TIMEOUT 5 /* seconds to wait for sync */
	50
	51	#define AUTH_PRIVATE(auth) (struct ad_private *) auth->ah_private
	52	#define ALLOC(object_type) (object_type *) mem_alloc(sizeof(object_type))
	53	#define FREE(ptr, size) mem_free((char *)(ptr), (int) size)
	54	#define ATTEMPT(xdr_op) if (!(xdr_op)) return (FALSE)
	55
	56	#define debug(msg) /* printf("%s\n", msg) */
	57
	58	extern int rtime (struct sockaddr_in , struct timeval , struct timeval *);
	59	extern bool_t xdr_authdes_cred (XDR , struct authdes_cred );
	60	extern bool_t xdr_authdes_verf (XDR , struct authdes_verf );
	61
	62	/*
	63	* DES authenticator operations vector
	64	*/
800d775e UD	65	static void authdes_nextverf (AUTH *);
	66	static bool_t authdes_marshal (AUTH , XDR );
	67	static bool_t authdes_validate (AUTH , struct opaque_auth );
	68	static bool_t authdes_refresh (AUTH *);
	69	static void authdes_destroy (AUTH *);
dfd2257a UD	70	static bool_t synchronize (struct sockaddr , struct timeval )
dfd2257a UD	71	internal_function;
800d775e UD	72
	73	static struct auth_ops authdes_ops =
	74	{
	75	authdes_nextverf,
	76	authdes_marshal,
	77	authdes_validate,
	78	authdes_refresh,
	79	authdes_destroy
	80	};
	81
	82
	83	/*
	84	* This struct is pointed to by the ah_private field of an "AUTH *"
	85	*/
	86	struct ad_private
	87	{
	88	char ad_fullname; / client's full name */
	89	u_int ad_fullnamelen; /* length of name, rounded up */
	90	char ad_servername; / server's full name */
	91	u_int ad_servernamelen; /* length of name, rounded up */
	92	u_int ad_window; /* client specified window */
	93	bool_t ad_dosync; /* synchronize? */
	94	struct sockaddr ad_syncaddr; /* remote host to synch with */
	95	struct timeval ad_timediff; /* server's time - client's time */
	96	u_long ad_nickname; /* server's nickname for client */
	97	struct authdes_cred ad_cred; /* storage for credential */
	98	struct authdes_verf ad_verf; /* storage for verifier */
	99	struct timeval ad_timestamp; /* timestamp sent */
	100	des_block ad_xkey; /* encrypted conversation key */
	101	u_char ad_pkey[1024]; /* Servers actual public key */
	102	};
	103
	104
	105	/*
	106	* Create the client des authentication object
	107	*/
	108	AUTH *
9a0a462c	109	authdes_create (const char *servername, u_int window,
26a60f90	110	struct sockaddr syncaddr, des_block ckey)
800d775e UD	111	/* servername - network name of server */
	112	/* window - time to live */
	113	/* syncaddr - optional addr of host to sync with */
	114	/* ckey - optional conversation key to use */
	115	{
	116	u_char pkey_data[1024];
	117	netobj pkey;
	118
	119	if (!getpublickey (servername, pkey_data))
	120	return (NULL);
	121
	122	pkey.n_bytes = (char *) pkey_data;
	123	pkey.n_len = strlen ((char *) pkey_data) + 1;
	124	return authdes_pk_create (servername, &pkey, window, syncaddr, ckey);
	125	}
	126
	127	AUTH *
26a60f90 UD	128	authdes_pk_create (const char servername, netobj pkey, u_int window,
26a60f90 UD	129	struct sockaddr syncaddr, des_block ckey)
800d775e UD	130	{
	131	AUTH *auth;
	132	struct ad_private *ad;
	133	char namebuf[MAXNETNAMELEN + 1];
	134
	135	/*
	136	* Allocate everything now
	137	*/
	138	auth = ALLOC (AUTH);
	139	ad = ALLOC (struct ad_private);
dfd2257a	140	memset (ad, 0, sizeof (struct ad_private));
800d775e UD	141	memcpy (ad->ad_pkey, pkey->n_bytes, pkey->n_len);
	142	if (!getnetname (namebuf))
	143	goto failed;
	144	ad->ad_fullnamelen = RNDUP (strlen (namebuf));
	145	ad->ad_fullname = mem_alloc (ad->ad_fullnamelen + 1);
	146
	147	ad->ad_servernamelen = strlen (servername);
	148	ad->ad_servername = mem_alloc (ad->ad_servernamelen + 1);
	149
	150	if (auth == NULL \|\| ad == NULL \|\| ad->ad_fullname == NULL \|\|
	151	ad->ad_servername == NULL)
	152	{
	153	debug ("authdes_create: out of memory");
	154	goto failed;
	155	}
	156
	157	/*
	158	* Set up private data
	159	*/
	160	bcopy (namebuf, ad->ad_fullname, ad->ad_fullnamelen + 1);
	161	bcopy (servername, ad->ad_servername, ad->ad_servernamelen + 1);
9a0a462c	162	ad->ad_timediff.tv_sec = ad->ad_timediff.tv_usec = 0;
800d775e UD	163	if (syncaddr != NULL)
	164	{
	165	ad->ad_syncaddr = *syncaddr;
	166	ad->ad_dosync = TRUE;
	167	}
	168	else
	169	ad->ad_dosync = FALSE;
	170
	171	ad->ad_window = window;
	172	if (ckey == NULL)
	173	{
	174	if (key_gendes (&auth->ah_key) < 0)
	175	{
	176	debug ("authdes_create: unable to gen conversation key");
	177	return (NULL);
	178	}
	179	}
	180	else
	181	auth->ah_key = *ckey;
	182
	183	/*
	184	* Set up auth handle
	185	*/
	186	auth->ah_cred.oa_flavor = AUTH_DES;
	187	auth->ah_verf.oa_flavor = AUTH_DES;
	188	auth->ah_ops = &authdes_ops;
	189	auth->ah_private = (caddr_t) ad;
	190
	191	if (!authdes_refresh (auth))
	192	goto failed;
	193
	194	return (auth);
	195
	196	failed:
	197	if (auth != NULL)
	198	FREE (auth, sizeof (AUTH));
	199	if (ad != NULL)
9a0a462c	200	{
9a0a462c UD	201	if (ad->ad_fullname != NULL)
	202	FREE (ad->ad_fullname, ad->ad_fullnamelen + 1);
	203	if (ad->ad_servername != NULL)
	204	FREE (ad->ad_servername, ad->ad_servernamelen + 1);
dfd2257a	205	FREE (ad, sizeof (struct ad_private));
9a0a462c	206	}
800d775e UD	207	return (NULL);
	208	}
	209
	210	/*
	211	* Implement the five authentication operations
	212	*/
	213
	214
	215	/*
	216	* 1. Next Verifier
	217	*/
	218	/ARGSUSED /
	219	static void
	220	authdes_nextverf (AUTH * auth)
	221	{
	222	/* what the heck am I supposed to do??? */
	223	}
	224
	225
	226
	227	/*
	228	* 2. Marshal
	229	*/
	230	static bool_t
	231	authdes_marshal (AUTH * auth, XDR * xdrs)
	232	{
	233	struct ad_private *ad = AUTH_PRIVATE (auth);
	234	struct authdes_cred *cred = &ad->ad_cred;
	235	struct authdes_verf *verf = &ad->ad_verf;
	236	des_block cryptbuf[2];
	237	des_block ivec;
	238	int status;
	239	int len;
	240	register long *ixdr;
	241
	242	/*
	243	* Figure out the "time", accounting for any time difference
	244	* with the server if necessary.
	245	*/
	246	gettimeofday (&ad->ad_timestamp, (struct timezone *) NULL);
	247	ad->ad_timestamp.tv_sec += ad->ad_timediff.tv_sec;
	248	ad->ad_timestamp.tv_usec += ad->ad_timediff.tv_usec;
	249	if (ad->ad_timestamp.tv_usec >= MILLION)
	250	{
	251	ad->ad_timestamp.tv_usec -= MILLION;
	252	ad->ad_timestamp.tv_sec += 1;
	253	}
	254
	255	/*
	256	* XDR the timestamp and possibly some other things, then
	257	* encrypt them.
	258	*/
	259	ixdr = (long *) cryptbuf;
	260	IXDR_PUT_LONG (ixdr, ad->ad_timestamp.tv_sec);
	261	IXDR_PUT_LONG (ixdr, ad->ad_timestamp.tv_usec);
	262	if (ad->ad_cred.adc_namekind == ADN_FULLNAME)
	263	{
	264	IXDR_PUT_U_LONG (ixdr, ad->ad_window);
	265	IXDR_PUT_U_LONG (ixdr, ad->ad_window - 1);
	266	ivec.key.high = ivec.key.low = 0;
	267	status = cbc_crypt ((char ) &auth->ah_key, (char ) cryptbuf,
	268	2 * sizeof (des_block), DES_ENCRYPT \| DES_HW, (char *) &ivec);
	269	}
	270	else
271	{
272	status = ecb_crypt ((char ) &auth->ah_key, (char ) cryptbuf,
273	sizeof (des_block), DES_ENCRYPT \| DES_HW);
274	}
275	if (DES_FAILED (status))
276	{
277	debug ("authdes_marshal: DES encryption failure");
278	return (FALSE);
279	}
280	ad->ad_verf.adv_xtimestamp = cryptbuf[0];
281	if (ad->ad_cred.adc_namekind == ADN_FULLNAME)
282	{
283	ad->ad_cred.adc_fullname.window = cryptbuf[1].key.high;
284	ad->ad_verf.adv_winverf = cryptbuf[1].key.low;
285	}
286	else
287	{
288	ad->ad_cred.adc_nickname = ad->ad_nickname;
289	ad->ad_verf.adv_winverf = 0;
290	}
291
292	/*
293	* Serialize the credential and verifier into opaque
294	* authentication data.
295	*/
296	if (ad->ad_cred.adc_namekind == ADN_FULLNAME)
297	{
298	len = ((1 + 1 + 2 + 1) * BYTES_PER_XDR_UNIT + ad->ad_fullnamelen);
299	}
300	else
301	{
302	len = (1 + 1) * BYTES_PER_XDR_UNIT;
303	}
304
305	if ((ixdr = xdr_inline (xdrs, 2 * BYTES_PER_XDR_UNIT)) != NULL)
306	{
307	IXDR_PUT_LONG (ixdr, AUTH_DES);
308	IXDR_PUT_LONG (ixdr, len);
309	}
310	else
311	{
312	ATTEMPT (xdr_putlong (xdrs, (long *)&auth->ah_cred.oa_flavor));
313	ATTEMPT (xdr_putlong (xdrs, (long *)&len));
314	}
315	ATTEMPT (xdr_authdes_cred (xdrs, cred));
316
317	len = (2 + 1) * BYTES_PER_XDR_UNIT;
318	if ((ixdr = xdr_inline (xdrs, 2 * BYTES_PER_XDR_UNIT)) != NULL)
319	{
320	IXDR_PUT_LONG (ixdr, AUTH_DES);
321	IXDR_PUT_LONG (ixdr, len);
322	}
323	else
324	{
325	ATTEMPT (xdr_putlong (xdrs, (long *)&auth->ah_verf.oa_flavor));
326	ATTEMPT (xdr_putlong (xdrs, (long *)&len));
327	}
328	ATTEMPT (xdr_authdes_verf (xdrs, verf));
329	return (TRUE);
330	}
331
332
333	/*
334	* 3. Validate
335	*/
336	static bool_t
337	authdes_validate (AUTH * auth, struct opaque_auth *rverf)
338	{
339	struct ad_private *ad = AUTH_PRIVATE (auth);
340	struct authdes_verf verf;
341	int status;
342	register u_long *ixdr;
343
344	if (rverf->oa_length != (2 + 1) * BYTES_PER_XDR_UNIT)
345	return (FALSE);
346
347	ixdr = (u_long *) rverf->oa_base;
348	verf.adv_xtimestamp.key.high = (u_long) * ixdr++;
349	verf.adv_xtimestamp.key.low = (u_long) * ixdr++;
350	verf.adv_int_u = (u_long) * ixdr++; /* nickname not XDR'd ! */
351
352	/*
353	* Decrypt the timestamp
354	*/
355	status = ecb_crypt ((char ) &auth->ah_key, (char ) &verf.adv_xtimestamp,
356	sizeof (des_block), DES_DECRYPT \| DES_HW);
357
358	if (DES_FAILED (status))
359	{
360	debug ("authdes_validate: DES decryption failure");
361	return (FALSE);
362	}
363
364	/*
365	* xdr the decrypted timestamp
366	*/
367	ixdr = (u_long *) verf.adv_xtimestamp.c;
368	verf.adv_timestamp.tv_sec = IXDR_GET_LONG (ixdr) + 1;
369	verf.adv_timestamp.tv_usec = IXDR_GET_LONG (ixdr);
370
371	/*
372	* validate
373	*/
374	if (bcmp ((char ) &ad->ad_timestamp, (char ) &verf.adv_timestamp,
375	sizeof (struct timeval)) != 0)
376	{
377	debug ("authdes_validate: verifier mismatch\n");
378	return (FALSE);
379	}
380
381	/*
382	* We have a nickname now, let's use it
383	*/
384	ad->ad_nickname = verf.adv_nickname;
385	ad->ad_cred.adc_namekind = ADN_NICKNAME;
386	return (TRUE);
387	}
388
389	/*
390	* 4. Refresh
391	*/
392	static bool_t
393	authdes_refresh (AUTH * auth)
394	{
395	netobj pkey;
396	struct ad_private *ad = AUTH_PRIVATE (auth);
397	struct authdes_cred *cred = &ad->ad_cred;
398
399	if (ad->ad_dosync &&
400	!synchronize (&ad->ad_syncaddr, &ad->ad_timediff))
401	{
402	/*
403	* Hope the clocks are synced!
404	*/
405	ad->ad_timediff.tv_sec = ad->ad_timediff.tv_usec = 0;
406	debug ("authdes_refresh: unable to synchronize with server");
407	}
408	ad->ad_xkey = auth->ah_key;
409	pkey.n_bytes = (char *) (ad->ad_pkey);
410	pkey.n_len = strlen ((char *) ad->ad_pkey) + 1;
411	if (key_encryptsession_pk (ad->ad_servername, &pkey, &ad->ad_xkey) < 0)
412	{
413	debug ("authdes_create: unable to encrypt conversation key");
414	return (FALSE);
415	}
416	cred->adc_fullname.key = ad->ad_xkey;
417	cred->adc_namekind = ADN_FULLNAME;
418	cred->adc_fullname.name = ad->ad_fullname;
419	return (TRUE);
420	}
421
422	/*
423	* 5. Destroy
424	*/
425	static void
426	authdes_destroy (AUTH * auth)
427	{
428	struct ad_private *ad = AUTH_PRIVATE (auth);
429
430	FREE (ad->ad_fullname, ad->ad_fullnamelen + 1);
431	FREE (ad->ad_servername, ad->ad_servernamelen + 1);
432	FREE (ad, sizeof (struct ad_private));
433	FREE (auth, sizeof (AUTH));
434	}
435
436	/*
437	* Synchronize with the server at the given address, that is,
438	* adjust timep to reflect the delta between our clocks
439	*/
440	static bool_t
dfd2257a	441	internal_function
800d775e UD	442	synchronize (struct sockaddr syncaddr, struct timeval timep)
	443	{
	444	struct timeval mytime;
	445	struct timeval timeout;
	446
	447	timeout.tv_sec = RTIME_TIMEOUT;
	448	timeout.tv_usec = 0;
	449	if (rtime ((struct sockaddr_in *) syncaddr, timep, &timeout) < 0)
	450	return (FALSE);
	451
	452	gettimeofday (&mytime, (struct timezone *) NULL);
	453	timep->tv_sec -= mytime.tv_sec;
	454	if (mytime.tv_usec > timep->tv_usec)
	455	{
	456	timep->tv_sec -= 1;
	457	timep->tv_usec += MILLION;
	458	}
	459	timep->tv_usec -= mytime.tv_usec;
	460	return (TRUE);
	461	}