1 /* $NetBSD: svc_auth.c,v 1.19 2024/01/23 17:24:38 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2010, Oracle America, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above 13 * copyright notice, this list of conditions and the following 14 * disclaimer in the documentation and/or other materials 15 * provided with the distribution. 16 * * Neither the name of the "Oracle America, Inc." nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 /* 34 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 35 */ 36 37 /* #ident "@(#)svc_auth.c 1.16 94/04/24 SMI" */ 38 39 #include <sys/cdefs.h> 40 #if defined(LIBC_SCCS) && !defined(lint) 41 #if 0 42 static char sccsid[] = "@(#)svc_auth.c 1.26 89/02/07 Copyr 1984 Sun Micro"; 43 #else 44 __RCSID("$NetBSD: svc_auth.c,v 1.19 2024/01/23 17:24:38 christos Exp $"); 45 #endif 46 #endif 47 48 /* 49 * svc_auth.c, Server-side rpc authenticator interface. 50 * 51 */ 52 53 #include "namespace.h" 54 #include "reentrant.h" 55 #include <sys/types.h> 56 #include <rpc/rpc.h> 57 #include <assert.h> 58 #include <stdlib.h> 59 60 #include "rpc_internal.h" 61 62 #ifdef __weak_alias 63 __weak_alias(svc_auth_reg,_svc_auth_reg) 64 #endif 65 66 /* 67 * svcauthsw is the bdevsw of server side authentication. 68 * 69 * Server side authenticators are called from authenticate by 70 * using the client auth struct flavor field to index into svcauthsw. 71 * The server auth flavors must implement a routine that looks 72 * like: 73 * 74 * enum auth_stat 75 * flavorx_auth(rqst, msg) 76 * struct svc_req *rqst; 77 * struct rpc_msg *msg; 78 * 79 */ 80 81 /* declarations to allow servers to specify new authentication flavors */ 82 struct authsvc { 83 int flavor; 84 enum auth_stat (*handler)(struct svc_req *, struct rpc_msg *); 85 struct authsvc *next; 86 }; 87 static struct authsvc *Auths = NULL; 88 89 /* 90 * The call rpc message, msg has been obtained from the wire. The msg contains 91 * the raw form of credentials and verifiers. authenticate returns AUTH_OK 92 * if the msg is successfully authenticated. If AUTH_OK then the routine also 93 * does the following things: 94 * set rqst->rq_xprt->verf to the appropriate response verifier; 95 * sets rqst->rq_client_cred to the "cooked" form of the credentials. 96 * 97 * NB: rqst->rq_cxprt->verf must be pre-allocated; 98 * its length is set appropriately. 99 * 100 * The caller still owns and is responsible for msg->u.cmb.cred and 101 * msg->u.cmb.verf. The authentication system retains ownership of 102 * rqst->rq_client_cred, the cooked credentials. 103 * 104 * There is an assumption that any flavour less than AUTH_NULL is 105 * invalid. 106 */ 107 enum auth_stat 108 _authenticate(struct svc_req *rqst, struct rpc_msg *msg) 109 { 110 int cred_flavor; 111 struct authsvc *asp; 112 enum auth_stat dummy; 113 114 _DIAGASSERT(rqst != NULL); 115 _DIAGASSERT(msg != NULL); 116 117 /* VARIABLES PROTECTED BY authsvc_lock: asp, Auths */ 118 119 rqst->rq_cred = msg->rm_call.cb_cred; 120 rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor; 121 rqst->rq_xprt->xp_verf.oa_length = 0; 122 cred_flavor = rqst->rq_cred.oa_flavor; 123 switch (cred_flavor) { 124 case AUTH_NULL: 125 dummy = _svcauth_null(rqst, msg); 126 return (dummy); 127 case AUTH_SYS: 128 dummy = _svcauth_unix(rqst, msg); 129 return (dummy); 130 case AUTH_SHORT: 131 dummy = _svcauth_short(rqst, msg); 132 return (dummy); 133 #if 0 134 case AUTH_DES: 135 dummy = __svcauth_des(rqst, msg); 136 return (dummy); 137 #endif 138 default: 139 break; 140 } 141 142 /* flavor doesn't match any of the builtin types, so try new ones */ 143 mutex_lock(&authsvc_lock); 144 for (asp = Auths; asp; asp = asp->next) { 145 if (asp->flavor == cred_flavor) { 146 enum auth_stat as; 147 148 as = (*asp->handler)(rqst, msg); 149 mutex_unlock(&authsvc_lock); 150 return (as); 151 } 152 } 153 mutex_unlock(&authsvc_lock); 154 155 return (AUTH_REJECTEDCRED); 156 } 157 158 /*ARGSUSED*/ 159 enum auth_stat 160 _svcauth_null(struct svc_req *rqst, struct rpc_msg *msg) 161 { 162 return (AUTH_OK); 163 } 164 165 /* 166 * Allow the rpc service to register new authentication types that it is 167 * prepared to handle. When an authentication flavor is registered, 168 * the flavor is checked against already registered values. If not 169 * registered, then a new Auths entry is added on the list. 170 * 171 * There is no provision to delete a registration once registered. 172 * 173 * This routine returns: 174 * 0 if registration successful 175 * 1 if flavor already registered 176 * -1 if can't register (errno set) 177 */ 178 179 int 180 svc_auth_reg( 181 int cred_flavor, 182 enum auth_stat (*handler)(struct svc_req *, struct rpc_msg *)) 183 { 184 struct authsvc *asp; 185 186 switch (cred_flavor) { 187 case AUTH_NULL: 188 case AUTH_SYS: 189 case AUTH_SHORT: 190 #if 0 191 case AUTH_DES: 192 #endif 193 /* already registered */ 194 return (1); 195 196 default: 197 mutex_lock(&authsvc_lock); 198 for (asp = Auths; asp; asp = asp->next) { 199 if (asp->flavor == cred_flavor) { 200 /* already registered */ 201 mutex_unlock(&authsvc_lock); 202 return (1); 203 } 204 } 205 206 /* this is a new one, so go ahead and register it */ 207 asp = mem_alloc(sizeof (*asp)); 208 if (asp == NULL) { 209 mutex_unlock(&authsvc_lock); 210 return (-1); 211 } 212 asp->flavor = cred_flavor; 213 asp->handler = handler; 214 asp->next = Auths; 215 Auths = asp; 216 mutex_unlock(&authsvc_lock); 217 break; 218 } 219 return (0); 220 } 221
Indexes created Sun Sep 21 16:09:51 GMT 2025