1 2 /* 3 * Copyright (c) 2009, Sun Microsystems, Inc. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * - Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * - Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * - Neither the name of Sun Microsystems, Inc. nor the names of its 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 /* 30 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 31 */ 32 33 /* 34 * svc_auth.c, Server-side rpc authenticator interface. 35 * 36 */ 37 #include <wintirpc.h> 38 //#include <pthread.h> 39 #include <reentrant.h> 40 #include <sys/types.h> 41 #include <rpc/rpc.h> 42 #include <stdlib.h> 43 44 /* 45 * svcauthsw is the bdevsw of server side authentication. 46 * 47 * Server side authenticators are called from authenticate by 48 * using the client auth struct flavor field to index into svcauthsw. 49 * The server auth flavors must implement a routine that looks 50 * like: 51 * 52 * enum auth_stat 53 * flavorx_auth(rqst, msg) 54 * struct svc_req *rqst; 55 * struct rpc_msg *msg; 56 * 57 */ 58 59 /* declarations to allow servers to specify new authentication flavors */ 60 struct authsvc { 61 int flavor; 62 enum auth_stat (*handler)(struct svc_req *, struct rpc_msg *); 63 struct authsvc *next; 64 }; 65 static struct authsvc *Auths = NULL; 66 67 /* 68 * The call rpc message, msg has been obtained from the wire. The msg contains 69 * the raw form of credentials and verifiers. authenticate returns AUTH_OK 70 * if the msg is successfully authenticated. If AUTH_OK then the routine also 71 * does the following things: 72 * set rqst->rq_xprt->verf to the appropriate response verifier; 73 * sets rqst->rq_client_cred to the "cooked" form of the credentials. 74 * 75 * NB: rqst->rq_cxprt->verf must be pre-alloctaed; 76 * its length is set appropriately. 77 * 78 * The caller still owns and is responsible for msg->u.cmb.cred and 79 * msg->u.cmb.verf. The authentication system retains ownership of 80 * rqst->rq_client_cred, the cooked credentials. 81 * 82 * There is an assumption that any flavour less than AUTH_NULL is 83 * invalid. 84 */ 85 enum auth_stat 86 _authenticate(rqst, msg) 87 struct svc_req *rqst; 88 struct rpc_msg *msg; 89 { 90 int cred_flavor; 91 struct authsvc *asp; 92 enum auth_stat dummy; 93 extern mutex_t authsvc_lock; 94 95 /* VARIABLES PROTECTED BY authsvc_lock: asp, Auths */ 96 97 rqst->rq_cred = msg->rm_call.cb_cred; 98 rqst->rq_xprt->xp_verf.oa_flavor = _null_auth.oa_flavor; 99 rqst->rq_xprt->xp_verf.oa_length = 0; 100 cred_flavor = rqst->rq_cred.oa_flavor; 101 switch (cred_flavor) { 102 case AUTH_NULL: 103 dummy = _svcauth_null(rqst, msg); 104 return (dummy); 105 case AUTH_SYS: 106 dummy = _svcauth_unix(rqst, msg); 107 return (dummy); 108 case AUTH_SHORT: 109 dummy = _svcauth_short(rqst, msg); 110 return (dummy); 111 #ifdef DES_BUILTIN 112 case AUTH_DES: 113 dummy = _svcauth_des(rqst, msg); 114 return (dummy); 115 #endif 116 default: 117 break; 118 } 119 120 /* flavor doesn't match any of the builtin types, so try new ones */ 121 mutex_lock(&authsvc_lock); 122 for (asp = Auths; asp; asp = asp->next) { 123 if (asp->flavor == cred_flavor) { 124 enum auth_stat as; 125 126 as = (*asp->handler)(rqst, msg); 127 mutex_unlock(&authsvc_lock); 128 return (as); 129 } 130 } 131 mutex_unlock(&authsvc_lock); 132 133 return (AUTH_REJECTEDCRED); 134 } 135 136 /*ARGSUSED*/ 137 enum auth_stat 138 _svcauth_null(rqst, msg) 139 struct svc_req *rqst; 140 struct rpc_msg *msg; 141 { 142 return (AUTH_OK); 143 } 144 145 /* 146 * Allow the rpc service to register new authentication types that it is 147 * prepared to handle. When an authentication flavor is registered, 148 * the flavor is checked against already registered values. If not 149 * registered, then a new Auths entry is added on the list. 150 * 151 * There is no provision to delete a registration once registered. 152 * 153 * This routine returns: 154 * 0 if registration successful 155 * 1 if flavor already registered 156 * -1 if can't register (errno set) 157 */ 158 159 int 160 svc_auth_reg(cred_flavor, handler) 161 int cred_flavor; 162 enum auth_stat (*handler)(struct svc_req *, struct rpc_msg *); 163 { 164 struct authsvc *asp; 165 extern mutex_t authsvc_lock; 166 167 switch (cred_flavor) { 168 case AUTH_NULL: 169 case AUTH_SYS: 170 case AUTH_SHORT: 171 #ifdef DES_BUILTIN 172 case AUTH_DES: 173 #endif 174 /* already registered */ 175 return (1); 176 177 default: 178 mutex_lock(&authsvc_lock); 179 for (asp = Auths; asp; asp = asp->next) { 180 if (asp->flavor == cred_flavor) { 181 /* already registered */ 182 mutex_unlock(&authsvc_lock); 183 return (1); 184 } 185 } 186 187 /* this is a new one, so go ahead and register it */ 188 asp = mem_alloc(sizeof (*asp)); 189 if (asp == NULL) { 190 mutex_unlock(&authsvc_lock); 191 return (-1); 192 } 193 asp->flavor = cred_flavor; 194 asp->handler = handler; 195 asp->next = Auths; 196 Auths = asp; 197 mutex_unlock(&authsvc_lock); 198 break; 199 } 200 return (0); 201 } 202