1 files changed, 554 insertions, 0 deletions

diff --git a/lib/libc/rpc/auth_des.c b/lib/libc/rpc/auth_des.c
new file mode 100644
index 0000000..51cfb1f
--- /dev/null
+++ b/lib/libc/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[] = "$FreeBSD$";
+#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