1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 * 29 * @(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro 30 * @(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC 31 * $FreeBSD: src/lib/libc/rpc/svc_auth_unix.c,v 1.8 1999/08/28 00:00:49 peter Exp $ 32 * $DragonFly: src/lib/libc/rpc/svc_auth_unix.c,v 1.3 2004/10/25 19:38:02 drhodus Exp $ 33 */ 34 35 /* 36 * svc_auth_unix.c 37 * Handles UNIX flavor authentication parameters on the service side of rpc. 38 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. 39 * _svcauth_unix does full blown unix style uid,gid+gids auth, 40 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. 41 * Note: the shorthand has been gutted for efficiency. 42 * 43 * Copyright (C) 1984, Sun Microsystems, Inc. 44 */ 45 46 #include <stdio.h> 47 #include <string.h> 48 #include <rpc/rpc.h> 49 50 /* 51 * Unix longhand authenticator 52 */ 53 enum auth_stat 54 _svcauth_unix(rqst, msg) 55 struct svc_req *rqst; 56 struct rpc_msg *msg; 57 { 58 enum auth_stat stat; 59 XDR xdrs; 60 struct authunix_parms *aup; 61 int32_t *buf; 62 struct area { 63 struct authunix_parms area_aup; 64 char area_machname[MAX_MACHINE_NAME+1]; 65 int area_gids[NGRPS]; 66 } *area; 67 u_int auth_len; 68 int str_len, gid_len; 69 int i; 70 71 area = (struct area *) rqst->rq_clntcred; 72 aup = &area->area_aup; 73 aup->aup_machname = area->area_machname; 74 aup->aup_gids = area->area_gids; 75 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 76 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 77 buf = XDR_INLINE(&xdrs, auth_len); 78 if (buf != NULL) { 79 aup->aup_time = IXDR_GET_LONG(buf); 80 str_len = IXDR_GET_U_LONG(buf); 81 if (str_len > MAX_MACHINE_NAME) { 82 stat = AUTH_BADCRED; 83 goto done; 84 } 85 memcpy(aup->aup_machname, (caddr_t)buf, (u_int)str_len); 86 aup->aup_machname[str_len] = 0; 87 str_len = RNDUP(str_len); 88 buf += str_len / sizeof (int32_t); 89 aup->aup_uid = IXDR_GET_LONG(buf); 90 aup->aup_gid = IXDR_GET_LONG(buf); 91 gid_len = IXDR_GET_U_LONG(buf); 92 if (gid_len > NGRPS) { 93 stat = AUTH_BADCRED; 94 goto done; 95 } 96 aup->aup_len = gid_len; 97 for (i = 0; i < gid_len; i++) { 98 aup->aup_gids[i] = IXDR_GET_LONG(buf); 99 } 100 /* 101 * five is the smallest unix credentials structure - 102 * timestamp, hostname len (0), uid, gid, and gids len (0). 103 */ 104 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 105 (void) printf("bad auth_len gid %d str %d auth %d\n", 106 gid_len, str_len, auth_len); 107 stat = AUTH_BADCRED; 108 goto done; 109 } 110 } else if (! xdr_authunix_parms(&xdrs, aup)) { 111 xdrs.x_op = XDR_FREE; 112 (void)xdr_authunix_parms(&xdrs, aup); 113 stat = AUTH_BADCRED; 114 goto done; 115 } 116 117 /* get the verifier */ 118 if ((u_int)msg->rm_call.cb_verf.oa_length) { 119 rqst->rq_xprt->xp_verf.oa_flavor = 120 msg->rm_call.cb_verf.oa_flavor; 121 rqst->rq_xprt->xp_verf.oa_base = 122 msg->rm_call.cb_verf.oa_base; 123 rqst->rq_xprt->xp_verf.oa_length = 124 msg->rm_call.cb_verf.oa_length; 125 } else { 126 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 127 rqst->rq_xprt->xp_verf.oa_length = 0; 128 } 129 stat = AUTH_OK; 130 done: 131 XDR_DESTROY(&xdrs); 132 return (stat); 133 } 134 135 136 /* 137 * Shorthand unix authenticator 138 * Looks up longhand in a cache. 139 */ 140 /*ARGSUSED*/ 141 enum auth_stat 142 _svcauth_short(rqst, msg) 143 struct svc_req *rqst; 144 struct rpc_msg *msg; 145 { 146 return (AUTH_REJECTEDCRED); 147 } 148