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 *sccsid = "from: @(#)svc_auth_unix.c 1.28 88/02/08 Copyr 1984 Sun Micro";*/ 32 /*static char *sccsid = "from: @(#)svc_auth_unix.c 2.3 88/08/01 4.0 RPCSRC";*/ 33 static char *rcsid = "$FreeBSD$"; 34 #endif 35 36 /* 37 * svc_auth_unix.c 38 * Handles UNIX flavor authentication parameters on the service side of rpc. 39 * There are two svc auth implementations here: AUTH_UNIX and AUTH_SHORT. 40 * _svcauth_unix does full blown unix style uid,gid+gids auth, 41 * _svcauth_short uses a shorthand auth to index into a cache of longhand auths. 42 * Note: the shorthand has been gutted for efficiency. 43 * 44 * Copyright (C) 1984, Sun Microsystems, Inc. 45 */ 46 47 #include <stdio.h> 48 #include <string.h> 49 #include <rpc/rpc.h> 50 51 /* 52 * Unix longhand authenticator 53 */ 54 enum auth_stat 55 _svcauth_unix(rqst, msg) 56 register struct svc_req *rqst; 57 register struct rpc_msg *msg; 58 { 59 register enum auth_stat stat; 60 XDR xdrs; 61 register struct authunix_parms *aup; 62 register int32_t *buf; 63 struct area { 64 struct authunix_parms area_aup; 65 char area_machname[MAX_MACHINE_NAME+1]; 66 int area_gids[NGRPS]; 67 } *area; 68 u_int auth_len; 69 int str_len, gid_len; 70 register int i; 71 72 area = (struct area *) rqst->rq_clntcred; 73 aup = &area->area_aup; 74 aup->aup_machname = area->area_machname; 75 aup->aup_gids = area->area_gids; 76 auth_len = (u_int)msg->rm_call.cb_cred.oa_length; 77 xdrmem_create(&xdrs, msg->rm_call.cb_cred.oa_base, auth_len,XDR_DECODE); 78 buf = XDR_INLINE(&xdrs, auth_len); 79 if (buf != NULL) { 80 aup->aup_time = IXDR_GET_LONG(buf); 81 str_len = IXDR_GET_U_LONG(buf); 82 if (str_len > MAX_MACHINE_NAME) { 83 stat = AUTH_BADCRED; 84 goto done; 85 } 86 memcpy(aup->aup_machname, (caddr_t)buf, (u_int)str_len); 87 aup->aup_machname[str_len] = 0; 88 str_len = RNDUP(str_len); 89 buf += str_len / sizeof (int32_t); 90 aup->aup_uid = IXDR_GET_LONG(buf); 91 aup->aup_gid = IXDR_GET_LONG(buf); 92 gid_len = IXDR_GET_U_LONG(buf); 93 if (gid_len > NGRPS) { 94 stat = AUTH_BADCRED; 95 goto done; 96 } 97 aup->aup_len = gid_len; 98 for (i = 0; i < gid_len; i++) { 99 aup->aup_gids[i] = IXDR_GET_LONG(buf); 100 } 101 /* 102 * five is the smallest unix credentials structure - 103 * timestamp, hostname len (0), uid, gid, and gids len (0). 104 */ 105 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) { 106 (void) printf("bad auth_len gid %d str %d auth %d\n", 107 gid_len, str_len, auth_len); 108 stat = AUTH_BADCRED; 109 goto done; 110 } 111 } else if (! xdr_authunix_parms(&xdrs, aup)) { 112 xdrs.x_op = XDR_FREE; 113 (void)xdr_authunix_parms(&xdrs, aup); 114 stat = AUTH_BADCRED; 115 goto done; 116 } 117 118 /* get the verifier */ 119 if ((u_int)msg->rm_call.cb_verf.oa_length) { 120 rqst->rq_xprt->xp_verf.oa_flavor = 121 msg->rm_call.cb_verf.oa_flavor; 122 rqst->rq_xprt->xp_verf.oa_base = 123 msg->rm_call.cb_verf.oa_base; 124 rqst->rq_xprt->xp_verf.oa_length = 125 msg->rm_call.cb_verf.oa_length; 126 } else { 127 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 128 rqst->rq_xprt->xp_verf.oa_length = 0; 129 } 130 stat = AUTH_OK; 131 done: 132 XDR_DESTROY(&xdrs); 133 return (stat); 134 } 135 136 137 /* 138 * Shorthand unix authenticator 139 * Looks up longhand in a cache. 140 */ 141 /*ARGSUSED*/ 142 enum auth_stat 143 _svcauth_short(rqst, msg) 144 struct svc_req *rqst; 145 struct rpc_msg *msg; 146 { 147 return (AUTH_REJECTEDCRED); 148 } 149