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Diffstat (limited to 'lib/libc/rpc/auth_unix.c')
-rw-r--r--lib/libc/rpc/auth_unix.c322
1 files changed, 322 insertions, 0 deletions
diff --git a/lib/libc/rpc/auth_unix.c b/lib/libc/rpc/auth_unix.c
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+++ b/lib/libc/rpc/auth_unix.c
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+/*
+ * 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 *sccsid = "from: @(#)auth_unix.c 1.19 87/08/11 Copyr 1984 Sun Micro";*/
+/*static char *sccsid = "from: @(#)auth_unix.c 2.2 88/08/01 4.0 RPCSRC";*/
+static char *rcsid = "$Id: auth_unix.c,v 1.1 1993/10/27 05:40:11 paul Exp $";
+#endif
+
+/*
+ * 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 <stdio.h>
+#include <stdlib.h>
+
+#include <rpc/types.h>
+#include <rpc/xdr.h>
+#include <rpc/auth.h>
+#include <rpc/auth_unix.h>
+
+/*
+ * Unix authenticator operations vector
+ */
+static void authunix_nextverf();
+static bool_t authunix_marshal();
+static bool_t authunix_validate();
+static bool_t authunix_refresh();
+static void authunix_destroy();
+
+static struct auth_ops auth_unix_ops = {
+ authunix_nextverf,
+ authunix_marshal,
+ authunix_validate,
+ authunix_refresh,
+ 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)
+
+static bool_t marshal_new_auth();
+
+
+/*
+ * Create a unix style authenticator.
+ * Returns an auth handle with the given stuff in it.
+ */
+AUTH *
+authunix_create(machname, uid, gid, len, aup_gids)
+ char *machname;
+ int uid;
+ int gid;
+ register int len;
+ int *aup_gids;
+{
+ struct authunix_parms aup;
+ char mymem[MAX_AUTH_BYTES];
+ struct timeval now;
+ XDR xdrs;
+ register AUTH *auth;
+ register struct audata *au;
+
+ /*
+ * Allocate and set up auth handle
+ */
+ auth = (AUTH *)mem_alloc(sizeof(*auth));
+#ifndef KERNEL
+ if (auth == NULL) {
+ (void)fprintf(stderr, "authunix_create: out of memory\n");
+ return (NULL);
+ }
+#endif
+ au = (struct audata *)mem_alloc(sizeof(*au));
+#ifndef KERNEL
+ if (au == NULL) {
+ (void)fprintf(stderr, "authunix_create: out of memory\n");
+ return (NULL);
+ }
+#endif
+ auth->ah_ops = &auth_unix_ops;
+ auth->ah_private = (caddr_t)au;
+ auth->ah_verf = au->au_shcred = _null_auth;
+ au->au_shfaults = 0;
+
+ /*
+ * fill in param struct from the given params
+ */
+ (void)gettimeofday(&now, (struct timezone *)0);
+ aup.aup_time = now.tv_sec;
+ aup.aup_machname = machname;
+ aup.aup_uid = uid;
+ aup.aup_gid = gid;
+ aup.aup_len = (u_int)len;
+ aup.aup_gids = aup_gids;
+
+ /*
+ * Serialize the parameters into origcred
+ */
+ xdrmem_create(&xdrs, mymem, MAX_AUTH_BYTES, XDR_ENCODE);
+ if (! xdr_authunix_parms(&xdrs, &aup))
+ abort();
+ 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) {
+ (void)fprintf(stderr, "authunix_create: out of memory\n");
+ return (NULL);
+ }
+#endif
+ bcopy(mymem, au->au_origcred.oa_base, (u_int)len);
+
+ /*
+ * set auth handle to reflect new cred.
+ */
+ auth->ah_cred = au->au_origcred;
+ marshal_new_auth(auth);
+ return (auth);
+}
+
+/*
+ * Returns an auth handle with parameters determined by doing lots of
+ * syscalls.
+ */
+AUTH *
+authunix_create_default()
+{
+ register int len;
+ char machname[MAX_MACHINE_NAME + 1];
+ register int uid;
+ register int gid;
+ int gids[NGRPS];
+
+ if (gethostname(machname, MAX_MACHINE_NAME) == -1)
+ abort();
+ machname[MAX_MACHINE_NAME] = 0;
+ uid = geteuid();
+ gid = getegid();
+ if ((len = getgroups(NGRPS, gids)) < 0)
+ abort();
+ return (authunix_create(machname, uid, gid, len, gids));
+}
+
+/*
+ * authunix operations
+ */
+
+static void
+authunix_nextverf(auth)
+ AUTH *auth;
+{
+ /* no action necessary */
+}
+
+static bool_t
+authunix_marshal(auth, xdrs)
+ AUTH *auth;
+ XDR *xdrs;
+{
+ register struct audata *au = AUTH_PRIVATE(auth);
+
+ return (XDR_PUTBYTES(xdrs, au->au_marshed, au->au_mpos));
+}
+
+static bool_t
+authunix_validate(auth, verf)
+ register AUTH *auth;
+ struct opaque_auth verf;
+{
+ register 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)
+ register AUTH *auth;
+{
+ register struct audata *au = AUTH_PRIVATE(auth);
+ struct authunix_parms aup;
+ struct timeval now;
+ XDR xdrs;
+ register 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 authunix_parms */
+ aup.aup_machname = NULL;
+ aup.aup_gids = (int *)NULL;
+ xdrmem_create(&xdrs, au->au_origcred.oa_base,
+ au->au_origcred.oa_length, XDR_DECODE);
+ stat = xdr_authunix_parms(&xdrs, &aup);
+ if (! stat)
+ goto done;
+
+ /* update the time and serialize in place */
+ (void)gettimeofday(&now, (struct timezone *)0);
+ aup.aup_time = now.tv_sec;
+ xdrs.x_op = XDR_ENCODE;
+ XDR_SETPOS(&xdrs, 0);
+ stat = xdr_authunix_parms(&xdrs, &aup);
+ if (! stat)
+ goto done;
+ auth->ah_cred = au->au_origcred;
+ marshal_new_auth(auth);
+done:
+ /* free the struct authunix_parms created by deserializing */
+ xdrs.x_op = XDR_FREE;
+ (void)xdr_authunix_parms(&xdrs, &aup);
+ XDR_DESTROY(&xdrs);
+ return (stat);
+}
+
+static void
+authunix_destroy(auth)
+ register AUTH *auth;
+{
+ register struct audata *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((caddr_t)auth, sizeof(*auth));
+}
+
+/*
+ * Marshals (pre-serializes) an auth struct.
+ * sets private data, au_marshed and au_mpos
+ */
+static bool_t
+marshal_new_auth(auth)
+ register AUTH *auth;
+{
+ XDR xdr_stream;
+ register XDR *xdrs = &xdr_stream;
+ register struct audata *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)))) {
+ perror("auth_none.c - Fatal marshalling problem");
+ } else {
+ au->au_mpos = XDR_GETPOS(xdrs);
+ }
+ XDR_DESTROY(xdrs);
+}
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