1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1989 Sun Microsystems, Inc. All rights reserved. 24 * Copyright 2017 Joyent Inc 25 * Use is subject to license terms. 26 */ 27 28 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 29 /* All Rights Reserved */ 30 31 /* 32 * Portions of this source code were derived from Berkeley 4.3 BSD 33 * under license from the Regents of the University of California. 34 */ 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 45 #include <sys/param.h> 46 #include <sys/types.h> 47 #include <sys/time.h> 48 #include <sys/systm.h> 49 #include <sys/stream.h> 50 #include <sys/stropts.h> 51 #include <sys/strsubr.h> 52 #include <sys/tiuser.h> 53 #include <sys/tihdr.h> 54 #include <sys/t_kuser.h> 55 #include <sys/cmn_err.h> 56 #include <sys/debug.h> 57 58 #include <rpc/types.h> 59 #include <rpc/xdr.h> 60 #include <rpc/auth.h> 61 #include <rpc/clnt.h> 62 #include <rpc/rpc_msg.h> 63 #include <rpc/svc.h> 64 #include <rpc/auth_unix.h> 65 #include <rpc/svc_auth.h> 66 67 68 /* 69 * Unix longhand authenticator 70 */ 71 enum auth_stat 72 _svcauth_unix(struct svc_req *rqst, struct rpc_msg *msg) 73 { 74 struct authunix_parms *aup; 75 int32_t *buf; 76 struct area { 77 struct authunix_parms area_aup; 78 char area_machname[MAX_MACHINE_NAME+1]; 79 gid_t area_gids[NGRPS]; 80 } *area; 81 uint_t auth_len; 82 uint_t str_len, gid_len; 83 int i; 84 85 CTASSERT(sizeof (struct area) <= RQCRED_SIZE); 86 /* LINTED pointer alignment */ 87 area = (struct area *)rqst->rq_clntcred; 88 aup = &area->area_aup; 89 aup->aup_machname = area->area_machname; 90 aup->aup_gids = area->area_gids; 91 auth_len = msg->rm_call.cb_cred.oa_length; 92 if (auth_len == 0) 93 return (AUTH_BADCRED); 94 95 /* LINTED pointer cast */ 96 buf = (int32_t *)msg->rm_call.cb_cred.oa_base; 97 98 aup->aup_time = IXDR_GET_INT32(buf); 99 str_len = IXDR_GET_U_INT32(buf); 100 if (str_len > MAX_MACHINE_NAME) 101 return (AUTH_BADCRED); 102 bcopy((caddr_t)buf, aup->aup_machname, str_len); 103 aup->aup_machname[str_len] = 0; 104 str_len = RNDUP(str_len); 105 buf += str_len / sizeof (int32_t); 106 aup->aup_uid = IXDR_GET_INT32(buf); 107 aup->aup_gid = IXDR_GET_INT32(buf); 108 gid_len = IXDR_GET_U_INT32(buf); 109 if (gid_len > NGRPS) 110 return (AUTH_BADCRED); 111 aup->aup_len = gid_len; 112 for (i = 0; i < gid_len; i++) { 113 aup->aup_gids[i] = IXDR_GET_INT32(buf); 114 } 115 /* 116 * five is the smallest unix credentials structure - 117 * timestamp, hostname len (0), uid, gid, and gids len (0). 118 */ 119 if ((5 + gid_len) * BYTES_PER_XDR_UNIT + str_len > auth_len) 120 return (AUTH_BADCRED); 121 122 rqst->rq_xprt->xp_verf.oa_flavor = AUTH_NULL; 123 rqst->rq_xprt->xp_verf.oa_length = 0; 124 125 return (AUTH_OK); 126 } 127 128 129 /* 130 * Shorthand unix authenticator 131 * Looks up longhand in a cache. 132 */ 133 /* ARGSUSED */ 134 enum auth_stat 135 _svcauth_short(struct svc_req *rqst, struct rpc_msg *msg) 136 { 137 return (AUTH_REJECTEDCRED); 138 } 139