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 1.11 2004/10/16 06:11:35 obrien Exp $ 32 * $DragonFly: src/lib/libc/rpc/svc_auth_unix.c,v 1.4 2005/11/13 12:27:04 swildner 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 "namespace.h" 47 #include <assert.h> 48 #include <stdio.h> 49 #include <string.h> 50 51 #include <rpc/rpc.h> 52 #include "un-namespace.h" 53 54 /* 55 * Unix longhand authenticator 56 */ 57 enum auth_stat 58 _svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg) 59 { 60 enum auth_stat stat; 61 XDR xdrs; 62 struct authunix_parms *aup; 63 int32_t *buf; 64 struct area { 65 struct authunix_parms area_aup; 66 char area_machname[MAX_MACHINE_NAME+1]; 67 int area_gids[NGRPS]; 68 } *area; 69 u_int auth_len; 70 size_t str_len, gid_len; 71 u_int i; 72 73 assert(rqst != NULL); 74 assert(msg != NULL); 75 76 area = (struct area *) rqst->rq_clntcred; 77 aup = &area->area_aup; 78 aup->aup_machname = area->area_machname; 79 aup->aup_gids = area->area_gids; 80 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 81 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 82 buf = XDR_INLINE(&xdrs, auth_len); 83 if (buf != NULL) { 84 aup->aup_time = IXDR_GET_INT32(buf); 85 str_len = (size_t)IXDR_GET_U_INT32(buf); 86 if (str_len > MAX_MACHINE_NAME) { 87 stat = AUTH_BADCRED; 88 goto done; 89 } 90 memmove(aup->aup_machname, buf, str_len); 91 aup->aup_machname[str_len] = 0; 92 str_len = RNDUP(str_len); 93 buf += str_len / sizeof (int32_t); 94 aup->aup_uid = (int)IXDR_GET_INT32(buf); 95 aup->aup_gid = (int)IXDR_GET_INT32(buf); 96 gid_len = (size_t)IXDR_GET_U_INT32(buf); 97 if (gid_len > NGRPS) { 98 stat = AUTH_BADCRED; 99 goto done; 100 } 101 aup->aup_len = gid_len; 102 for (i = 0; i < gid_len; i++) { 103 aup->aup_gids[i] = (int)IXDR_GET_INT32(buf); 104 } 105 /* 106 * five is the smallest unix credentials structure - 107 * timestamp, hostname len (0), uid, gid, and gids len (0). 108 */ 109 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 110 printf("bad auth_len gid %ld str %ld auth %u\n", 111 (long)gid_len, (long)str_len, auth_len); 112 stat = AUTH_BADCRED; 113 goto done; 114 } 115 } else if (! xdr_authunix_parms(&xdrs, aup)) { 116 xdrs.x_op = XDR_FREE; 117 xdr_authunix_parms(&xdrs, aup); 118 stat = AUTH_BADCRED; 119 goto done; 120 } 121 122 /* get the verifier */ 123 if ((u_int)msg->rm_call.cb_verf.oa_length) { 124 rqst->rq_xprt->xp_verf.oa_flavor = 125 msg->rm_call.cb_verf.oa_flavor; 126 rqst->rq_xprt->xp_verf.oa_base = 127 msg->rm_call.cb_verf.oa_base; 128 rqst->rq_xprt->xp_verf.oa_length = 129 msg->rm_call.cb_verf.oa_length; 130 } else { 131 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 132 rqst->rq_xprt->xp_verf.oa_length = 0; 133 } 134 stat = AUTH_OK; 135 done: 136 XDR_DESTROY(&xdrs); 137 return (stat); 138 } 139 140 141 /* 142 * Shorthand unix authenticator 143 * Looks up longhand in a cache. 144 */ 145 /*ARGSUSED*/ 146 enum auth_stat 147 _svcauth_short(struct svc_req *rqst, struct rpc_msg *msg) 148 { 149 return (AUTH_REJECTEDCRED); 150 } 151