1 files changed, 299 insertions, 0 deletions

diff --git a/sys/rpc/auth_unix.c b/sys/rpc/auth_unix.c
new file mode 100644
index 000000000000..57824007d2ac
--- /dev/null
+++ b/sys/rpc/auth_unix.c
@@ -0,0 +1,299 @@
+/*	$NetBSD: auth_unix.c,v 1.18 2000/07/06 03:03:30 christos Exp $	*/
+
+/*
+ * 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
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char *sccsid2 = "@(#)auth_unix.c 1.19 87/08/11 Copyr 1984 Sun Micro";
+static char *sccsid = "@(#)auth_unix.c	2.2 88/08/01 4.0 RPCSRC";
+#endif
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * auth_unix.c, Implements UNIX style authentication parameters.
+ *
+ * Copyright (C) 1984, Sun Microsystems, Inc.
+ *
+ * The system is very weak.  The client uses no encryption for it's
+ * credentials and only sends null verifiers.  The server sends backs
+ * null verifiers or optionally a verifier that suggests a new short hand
+ * for the credentials.
+ *
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/lock.h>
+#include <sys/malloc.h>
+#include <sys/mutex.h>
+#include <sys/ucred.h>
+
+#include <rpc/types.h>
+#include <rpc/xdr.h>
+#include <rpc/auth.h>
+
+#include "rpc_com.h"
+
+/* auth_unix.c */
+static void authunix_nextverf (AUTH *);
+static bool_t authunix_marshal (AUTH *, XDR *);
+static bool_t authunix_validate (AUTH *, struct opaque_auth *);
+static bool_t authunix_refresh (AUTH *, void *);
+static void authunix_destroy (AUTH *);
+static void marshal_new_auth (AUTH *);
+
+static struct auth_ops authunix_ops = {
+	.ah_nextverf =		authunix_nextverf,
+	.ah_marshal =		authunix_marshal,
+	.ah_validate =		authunix_validate,
+	.ah_refresh =		authunix_refresh,
+	.ah_destroy =		authunix_destroy
+};
+
+/*
+ * This struct is pointed to by the ah_private field of an auth_handle.
+ */
+struct audata {
+	struct opaque_auth	au_origcred;	/* original credentials */
+	struct opaque_auth	au_shcred;	/* short hand cred */
+	u_long			au_shfaults;	/* short hand cache faults */
+	char			au_marshed[MAX_AUTH_BYTES];
+	u_int			au_mpos;	/* xdr pos at end of marshed */
+};
+#define	AUTH_PRIVATE(auth)	((struct audata *)auth->ah_private)
+
+/*
+ * Create a unix style authenticator.
+ * Returns an auth handle with the given stuff in it.
+ */
+AUTH *
+authunix_create(struct ucred *cred)
+{
+	struct xucred xcr;
+	char mymem[MAX_AUTH_BYTES];
+	XDR xdrs;
+	AUTH *auth;
+	struct audata *au;
+	struct timeval now;
+	uint32_t time;
+	int len;
+
+	/*
+	 * Allocate and set up auth handle
+	 */
+	au = NULL;
+	auth = mem_alloc(sizeof(*auth));
+#ifndef _KERNEL
+	if (auth == NULL) {
+		printf("authunix_create: out of memory");
+		goto cleanup_authunix_create;
+	}
+#endif
+	au = mem_alloc(sizeof(*au));
+#ifndef _KERNEL
+	if (au == NULL) {
+		printf("authunix_create: out of memory");
+		goto cleanup_authunix_create;
+	}
+#endif
+	auth->ah_ops = &authunix_ops;
+	auth->ah_private = (caddr_t)au;
+	auth->ah_verf = au->au_shcred = _null_auth;
+	au->au_shfaults = 0;
+	au->au_origcred.oa_base = NULL;
+
+	getmicrotime(&now);
+	time = now.tv_sec;
+
+	/*
+	 * Serialize the parameters into origcred
+	 */
+	xdrmem_create(&xdrs, mymem, MAX_AUTH_BYTES, XDR_ENCODE);
+	cru2x(cred, &xcr);
+	if (! xdr_authunix_parms(&xdrs, &time, &xcr)) 
+		panic("authunix_create: failed to encode creds");
+	au->au_origcred.oa_length = len = XDR_GETPOS(&xdrs);
+	au->au_origcred.oa_flavor = AUTH_UNIX;
+#ifdef _KERNEL
+	au->au_origcred.oa_base = mem_alloc((u_int) len);
+#else
+	if ((au->au_origcred.oa_base = mem_alloc((u_int) len)) == NULL) {
+		printf("authunix_create: out of memory");
+		goto cleanup_authunix_create;
+	}
+#endif
+	memcpy(au->au_origcred.oa_base, mymem, (size_t)len);
+
+	/*
+	 * set auth handle to reflect new cred.
+	 */
+	auth->ah_cred = au->au_origcred;
+	marshal_new_auth(auth);
+	return (auth);
+#ifndef _KERNEL
+ cleanup_authunix_create:
+	if (auth)
+		mem_free(auth, sizeof(*auth));
+	if (au) {
+		if (au->au_origcred.oa_base)
+			mem_free(au->au_origcred.oa_base, (u_int)len);
+		mem_free(au, sizeof(*au));
+	}
+	return (NULL);
+#endif
+}
+
+/*
+ * authunix operations
+ */
+
+/* ARGSUSED */
+static void
+authunix_nextverf(AUTH *auth)
+{
+	/* no action necessary */
+}
+
+static bool_t
+authunix_marshal(AUTH *auth, XDR *xdrs)
+{
+	struct audata *au;
+
+	au = AUTH_PRIVATE(auth);
+	return (XDR_PUTBYTES(xdrs, au->au_marshed, au->au_mpos));
+}
+
+static bool_t
+authunix_validate(AUTH *auth, struct opaque_auth *verf)
+{
+	struct audata *au;
+	XDR xdrs;
+
+	if (verf->oa_flavor == AUTH_SHORT) {
+		au = AUTH_PRIVATE(auth);
+		xdrmem_create(&xdrs, verf->oa_base, verf->oa_length,
+		    XDR_DECODE);
+
+		if (au->au_shcred.oa_base != NULL) {
+			mem_free(au->au_shcred.oa_base,
+			    au->au_shcred.oa_length);
+			au->au_shcred.oa_base = NULL;
+		}
+		if (xdr_opaque_auth(&xdrs, &au->au_shcred)) {
+			auth->ah_cred = au->au_shcred;
+		} else {
+			xdrs.x_op = XDR_FREE;
+			(void)xdr_opaque_auth(&xdrs, &au->au_shcred);
+			au->au_shcred.oa_base = NULL;
+			auth->ah_cred = au->au_origcred;
+		}
+		marshal_new_auth(auth);
+	}
+	return (TRUE);
+}
+
+static bool_t
+authunix_refresh(AUTH *auth, void *dummy)
+{
+	struct audata *au = AUTH_PRIVATE(auth);
+	struct xucred xcr;
+	uint32_t time;
+	struct timeval now;
+	XDR xdrs;
+	int stat;
+
+	if (auth->ah_cred.oa_base == au->au_origcred.oa_base) {
+		/* there is no hope.  Punt */
+		return (FALSE);
+	}
+	au->au_shfaults ++;
+
+	/* first deserialize the creds back into a struct ucred */
+	xdrmem_create(&xdrs, au->au_origcred.oa_base,
+	    au->au_origcred.oa_length, XDR_DECODE);
+	stat = xdr_authunix_parms(&xdrs, &time, &xcr);
+	if (! stat)
+		goto done;
+
+	/* update the time and serialize in place */
+	getmicrotime(&now);
+	time = now.tv_sec;
+	xdrs.x_op = XDR_ENCODE;
+	XDR_SETPOS(&xdrs, 0);
+
+	stat = xdr_authunix_parms(&xdrs, &time, &xcr);
+	if (! stat)
+		goto done;
+	auth->ah_cred = au->au_origcred;
+	marshal_new_auth(auth);
+done:
+	XDR_DESTROY(&xdrs);
+	return (stat);
+}
+
+static void
+authunix_destroy(AUTH *auth)
+{
+	struct audata *au;
+
+	au = AUTH_PRIVATE(auth);
+	mem_free(au->au_origcred.oa_base, au->au_origcred.oa_length);
+
+	if (au->au_shcred.oa_base != NULL)
+		mem_free(au->au_shcred.oa_base, au->au_shcred.oa_length);
+
+	mem_free(auth->ah_private, sizeof(struct audata));
+
+	if (auth->ah_verf.oa_base != NULL)
+		mem_free(auth->ah_verf.oa_base, auth->ah_verf.oa_length);
+
+	mem_free(auth, sizeof(*auth));
+}
+
+/*
+ * Marshals (pre-serializes) an auth struct.
+ * sets private data, au_marshed and au_mpos
+ */
+static void
+marshal_new_auth(AUTH *auth)
+{
+	XDR	xdr_stream;
+	XDR	*xdrs = &xdr_stream;
+	struct audata *au;
+
+	au = AUTH_PRIVATE(auth);
+	xdrmem_create(xdrs, au->au_marshed, MAX_AUTH_BYTES, XDR_ENCODE);
+	if ((! xdr_opaque_auth(xdrs, &(auth->ah_cred))) ||
+	    (! xdr_opaque_auth(xdrs, &(auth->ah_verf))))
+		printf("auth_none.c - Fatal marshalling problem");
+	else
+		au->au_mpos = XDR_GETPOS(xdrs);
+	XDR_DESTROY(xdrs);
+}