Add gss support from citi @ umich

[nfs-utils.git] / support / rpc / svc_auth_unix.c

diff --git a/support/rpc/svc_auth_unix.c b/support/rpc/svc_auth_unix.c
new file mode 100644 (file)
index 0000000..4ff6b26
--- /dev/null
+++ b/support/rpc/svc_auth_unix.c
@@ -0,0 +1,140 @@
+/*
+ * 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 *rcsid = "$OpenBSD: svc_auth_unix.c,v 1.6 1998/11/22 07:38:25 deraadt Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * svc_auth_unix.c
+ * Handles UNIX flavor authentication parameters on the service side of rpc.
+ * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT.
+ * _svcauth_unix does full blown unix style uid,gid+gids auth,
+ * _svcauth_short uses a shorthand auth to index into a cache of longhand auths.
+ * Note: the shorthand has been gutted for efficiency.
+ *
+ * Copyright (C) 1984, Sun Microsystems, Inc.
+ */
+
+#include <stdio.h>
+#include <rpc/rpc.h>
+#include <string.h>
+
+extern SVCAUTH svc_auth_none;
+
+/*
+ * Unix longhand authenticator
+ */
+enum auth_stat
+_svcauth_unix(rqst, msg)
+       register struct svc_req *rqst;
+       register struct rpc_msg *msg;
+{
+       register enum auth_stat stat;
+       XDR xdrs;
+       register struct authunix_parms *aup;
+       register int32_t *buf;
+       struct area {
+               struct authunix_parms area_aup;
+               char area_machname[MAX_MACHINE_NAME+1];
+               int area_gids[NGRPS];
+       } *area;
+       u_int auth_len;
+       u_int str_len, gid_len;
+       register u_int i;
+
+       rqst->rq_xprt->xp_auth = &svc_auth_none;
+
+       area = (struct area *) rqst->rq_clntcred;
+       aup = &area->area_aup;
+       aup->aup_machname = area->area_machname;
+       aup->aup_gids = area->area_gids;
+       auth_len = (u_int)msg->rm_call.cb_cred.oa_length;
+       xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE);
+       buf = XDR_INLINE(&xdrs, auth_len);
+       if (buf != NULL) {
+               aup->aup_time = IXDR_GET_LONG(buf);
+               str_len = IXDR_GET_U_LONG(buf);
+               if (str_len > MAX_MACHINE_NAME) {
+                       stat = AUTH_BADCRED;
+                       goto done;
+               }
+               memcpy(aup->aup_machname, (caddr_t)buf, (u_int)str_len);
+               aup->aup_machname[str_len] = 0;
+               str_len = RNDUP(str_len);
+               buf += str_len / sizeof (int32_t);
+               aup->aup_uid = IXDR_GET_LONG(buf);
+               aup->aup_gid = IXDR_GET_LONG(buf);
+               gid_len = IXDR_GET_U_LONG(buf);
+               if (gid_len > NGRPS) {
+                       stat = AUTH_BADCRED;
+                       goto done;
+               }
+               aup->aup_len = gid_len;
+               for (i = 0; i < gid_len; i++) {
+                       aup->aup_gids[i] = IXDR_GET_LONG(buf);
+               }
+               /*
+                * five is the smallest unix credentials structure -
+                * timestamp, hostname len (0), uid, gid, and gids len (0).
+                */
+               if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) {
+                       (void) printf("bad auth_len gid %u str %u auth %u\n",
+                           gid_len, str_len, auth_len);
+                       stat = AUTH_BADCRED;
+                       goto done;
+               }
+       } else if (! xdr_authunix_parms(&xdrs, aup)) {
+               xdrs.x_op = XDR_FREE;
+               (void)xdr_authunix_parms(&xdrs, aup);
+               stat = AUTH_BADCRED;
+               goto done;
+       }
+       rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL;
+       rqst->rq_xprt->xp_verf.oa_length = 0;
+       stat = AUTH_OK;
+done:
+       XDR_DESTROY(&xdrs);
+       return (stat);
+}
+
+
+/*
+ * Shorthand unix authenticator
+ * Looks up longhand in a cache.
+ */
+enum auth_stat
+_svcauth_short(rqst, msg)
+       struct svc_req *rqst;
+       struct rpc_msg *msg;
+{
+       rqst->rq_xprt->xp_auth = &svc_auth_none;
+
+       return (AUTH_REJECTEDCRED);
+}