152 lines
4.3 KiB
C
152 lines
4.3 KiB
C
/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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/*
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* svc_auth_unix.c
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* Handles UNIX flavor authentication parameters on the service side of rpc.
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* There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT.
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* _svcauth_unix does full blown unix style uid,gid+gids auth,
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* _svcauth_short uses a shorthand auth to index into a cache of longhand auths.
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* Note: the shorthand has been gutted for efficiency.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <rpc/rpc.h>
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#include <rpc/svc.h>
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/*
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* Unix longhand authenticator
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*/
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enum auth_stat
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_svcauth_unix (struct svc_req *rqst, struct rpc_msg *msg)
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{
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enum auth_stat stat;
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XDR xdrs;
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struct authunix_parms *aup;
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int32_t *buf;
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struct area
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{
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struct authunix_parms area_aup;
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char area_machname[MAX_MACHINE_NAME + 1];
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gid_t area_gids[NGRPS];
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}
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*area;
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u_int auth_len;
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u_int str_len, gid_len;
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u_int i;
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area = (struct area *) rqst->rq_clntcred;
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aup = &area->area_aup;
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aup->aup_machname = area->area_machname;
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aup->aup_gids = area->area_gids;
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auth_len = (u_int) msg->rm_call.cb_cred.oa_length;
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xdrmem_create (&xdrs, msg->rm_call.cb_cred.oa_base, auth_len, XDR_DECODE);
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buf = XDR_INLINE (&xdrs, auth_len);
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if (buf != NULL)
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{
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aup->aup_time = IXDR_GET_LONG (buf);
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str_len = IXDR_GET_U_INT32 (buf);
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if (str_len > MAX_MACHINE_NAME)
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{
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stat = AUTH_BADCRED;
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goto done;
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}
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memcpy (aup->aup_machname, (caddr_t) buf, (u_int) str_len);
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aup->aup_machname[str_len] = 0;
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str_len = RNDUP (str_len);
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buf = (int32_t *) ((char *) buf + str_len);
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aup->aup_uid = IXDR_GET_LONG (buf);
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aup->aup_gid = IXDR_GET_LONG (buf);
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gid_len = IXDR_GET_U_INT32 (buf);
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if (gid_len > NGRPS)
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{
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stat = AUTH_BADCRED;
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goto done;
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}
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aup->aup_len = gid_len;
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for (i = 0; i < gid_len; i++)
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{
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aup->aup_gids[i] = IXDR_GET_LONG (buf);
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}
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/*
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* five is the smallest unix credentials structure -
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* timestamp, hostname len (0), uid, gid, and gids len (0).
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*/
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if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len)
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{
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(void) printf ("bad auth_len gid %d str %d auth %d\n",
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gid_len, str_len, auth_len);
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stat = AUTH_BADCRED;
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goto done;
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}
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}
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else if (!xdr_authunix_parms (&xdrs, aup))
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{
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xdrs.x_op = XDR_FREE;
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(void) xdr_authunix_parms (&xdrs, aup);
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stat = AUTH_BADCRED;
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goto done;
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}
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/* get the verifier */
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if ((u_int)msg->rm_call.cb_verf.oa_length)
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{
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rqst->rq_xprt->xp_verf.oa_flavor =
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msg->rm_call.cb_verf.oa_flavor;
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rqst->rq_xprt->xp_verf.oa_base =
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msg->rm_call.cb_verf.oa_base;
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rqst->rq_xprt->xp_verf.oa_length =
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msg->rm_call.cb_verf.oa_length;
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}
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else
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{
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rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL;
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rqst->rq_xprt->xp_verf.oa_length = 0;
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}
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stat = AUTH_OK;
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done:
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XDR_DESTROY (&xdrs);
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return stat;
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}
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/*
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* Shorthand unix authenticator
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* Looks up longhand in a cache.
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*/
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/*ARGSUSED */
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enum auth_stat
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_svcauth_short (struct svc_req *rqst, struct rpc_msg *msg)
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{
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return AUTH_REJECTEDCRED;
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}
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