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 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char *rcsid = "$OpenBSD: svc_auth_unix.c,v 1.8 2005/04/01 07:44:04 otto Exp $"; 32 #endif /* LIBC_SCCS and not lint */ 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 #include <string.h> 48 49 /* 50 * Unix longhand authenticator 51 */ 52 enum auth_stat 53 _svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg) 54 { 55 enum auth_stat stat; 56 XDR xdrs; 57 struct authunix_parms *aup; 58 int32_t *buf; 59 struct area { 60 struct authunix_parms area_aup; 61 char area_machname[MAX_MACHINE_NAME+1]; 62 int area_gids[NGRPS]; 63 } *area; 64 u_int auth_len; 65 u_int str_len, gid_len; 66 u_int i; 67 68 area = (struct area *) rqst->rq_clntcred; 69 aup = &area->area_aup; 70 aup->aup_machname = area->area_machname; 71 aup->aup_gids = area->area_gids; 72 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 73 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 74 buf = XDR_INLINE(&xdrs, auth_len); 75 if (buf != NULL) { 76 aup->aup_time = IXDR_GET_LONG(buf); 77 str_len = IXDR_GET_U_LONG(buf); 78 if (str_len > MAX_MACHINE_NAME) { 79 stat = AUTH_BADCRED; 80 goto done; 81 } 82 memcpy(aup->aup_machname, (caddr_t)buf, (u_int)str_len); 83 aup->aup_machname[str_len] = 0; 84 str_len = RNDUP(str_len); 85 buf += str_len / sizeof (int32_t); 86 aup->aup_uid = IXDR_GET_LONG(buf); 87 aup->aup_gid = IXDR_GET_LONG(buf); 88 gid_len = IXDR_GET_U_LONG(buf); 89 if (gid_len > NGRPS) { 90 stat = AUTH_BADCRED; 91 goto done; 92 } 93 aup->aup_len = gid_len; 94 for (i = 0; i < gid_len; i++) { 95 aup->aup_gids[i] = IXDR_GET_LONG(buf); 96 } 97 /* 98 * five is the smallest unix credentials structure - 99 * timestamp, hostname len (0), uid, gid, and gids len (0). 100 */ 101 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 102 (void) printf("bad auth_len gid %u str %u auth %u\n", 103 gid_len, str_len, auth_len); 104 stat = AUTH_BADCRED; 105 goto done; 106 } 107 } else if (! xdr_authunix_parms(&xdrs, aup)) { 108 xdrs.x_op = XDR_FREE; 109 (void)xdr_authunix_parms(&xdrs, aup); 110 stat = AUTH_BADCRED; 111 goto done; 112 } 113 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 114 rqst->rq_xprt->xp_verf.oa_length = 0; 115 stat = AUTH_OK; 116 done: 117 XDR_DESTROY(&xdrs); 118 return (stat); 119 } 120 121 122 /* 123 * Shorthand unix authenticator 124 * Looks up longhand in a cache. 125 */ 126 /*ARGSUSED*/ 127 enum auth_stat 128 _svcauth_short(struct svc_req *rqst, struct rpc_msg *msg) 129 { 130 return (AUTH_REJECTEDCRED); 131 } 132