1 /* @(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC; from 1.28 88/02/08 SMI */ 2 /* 3 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 4 * unrestricted use provided that this legend is included on all tape 5 * media and as a part of the software program in whole or part. Users 6 * may copy or modify Sun RPC without charge, but are not authorized 7 * to license or distribute it to anyone else except as part of a product or 8 * program developed by the user. 9 * 10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 13 * 14 * Sun RPC is provided with no support and without any obligation on the 15 * part of Sun Microsystems, Inc. to assist in its use, correction, 16 * modification or enhancement. 17 * 18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 20 * OR ANY PART THEREOF. 21 * 22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 23 * or profits or other special, indirect and consequential damages, even if 24 * Sun has been advised of the possibility of such damages. 25 * 26 * Sun Microsystems, Inc. 27 * 2550 Garcia Avenue 28 * Mountain View, California 94043 29 */ 30 #if !defined(lint) && defined(SCCSIDS) 31 static char sccsid[] = "@(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro"; 32 #endif 33 34 /* 35 * svc_auth_unix.c 36 * Handles UNIX flavor authentication parameters on the service side of rpc. 37 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. 38 * _svcauth_unix does full blown unix style uid,gid+gids auth, 39 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. 40 * Note: the shorthand has been gutted for efficiency. 41 * 42 * Copyright (C) 1984, Sun Microsystems, Inc. 43 */ 44 45 #include <stdio.h> 46 #include <rpc/rpc.h> 47 48 /* 49 * Unix longhand authenticator 50 */ 51 enum auth_stat 52 _svcauth_unix(rqst, msg) 53 register struct svc_req *rqst; 54 register struct rpc_msg *msg; 55 { 56 register enum auth_stat stat; 57 XDR xdrs; 58 register struct authunix_parms *aup; 59 register long *buf; 60 struct area { 61 struct authunix_parms area_aup; 62 char area_machname[MAX_MACHINE_NAME+1]; 63 int area_gids[NGRPS]; 64 } *area; 65 u_int auth_len; 66 int str_len, gid_len; 67 register int i; 68 69 area = (struct area *) rqst->rq_clntcred; 70 aup = &area->area_aup; 71 aup->aup_machname = area->area_machname; 72 aup->aup_gids = area->area_gids; 73 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 74 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 75 buf = XDR_INLINE(&xdrs, auth_len); 76 if (buf != NULL) { 77 aup->aup_time = IXDR_GET_LONG(buf); 78 str_len = IXDR_GET_U_LONG(buf); 79 if (str_len > MAX_MACHINE_NAME) { 80 stat = AUTH_BADCRED; 81 goto done; 82 } 83 bcopy((caddr_t)buf, aup->aup_machname, (u_int)str_len); 84 aup->aup_machname[str_len] = 0; 85 str_len = RNDUP(str_len); 86 buf += str_len / sizeof (long); 87 aup->aup_uid = IXDR_GET_LONG(buf); 88 aup->aup_gid = IXDR_GET_LONG(buf); 89 gid_len = IXDR_GET_U_LONG(buf); 90 if (gid_len > NGRPS) { 91 stat = AUTH_BADCRED; 92 goto done; 93 } 94 aup->aup_len = gid_len; 95 for (i = 0; i < gid_len; i++) { 96 aup->aup_gids[i] = IXDR_GET_LONG(buf); 97 } 98 /* 99 * five is the smallest unix credentials structure - 100 * timestamp, hostname len (0), uid, gid, and gids len (0). 101 */ 102 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 103 (void) printf("bad auth_len gid %d str %d auth %d\n", 104 gid_len, str_len, auth_len); 105 stat = AUTH_BADCRED; 106 goto done; 107 } 108 } else if (! xdr_authunix_parms(&xdrs, aup)) { 109 xdrs.x_op = XDR_FREE; 110 (void)xdr_authunix_parms(&xdrs, aup); 111 stat = AUTH_BADCRED; 112 goto done; 113 } 114 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 115 rqst->rq_xprt->xp_verf.oa_length = 0; 116 stat = AUTH_OK; 117 done: 118 XDR_DESTROY(&xdrs); 119 return (stat); 120 } 121 122 123 /* 124 * Shorthand unix authenticator 125 * Looks up longhand in a cache. 126 */ 127 /*ARGSUSED*/ 128 enum auth_stat 129 _svcauth_short(rqst, msg) 130 struct svc_req *rqst; 131 struct rpc_msg *msg; 132 { 133 return (AUTH_REJECTEDCRED); 134 } 135