1 /*- 2 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/ 3 * Authors: Doug Rabson <dfr@rabson.org> 4 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/kernel.h> 33 #include <sys/kobj.h> 34 #include <sys/malloc.h> 35 #include <sys/module.h> 36 #include <sys/priv.h> 37 #include <sys/syscall.h> 38 #include <sys/sysent.h> 39 #include <sys/sysproto.h> 40 41 #include <kgssapi/gssapi.h> 42 #include <kgssapi/gssapi_impl.h> 43 #include <rpc/rpc.h> 44 #include <rpc/rpc_com.h> 45 46 #include "gssd.h" 47 #include "kgss_if.h" 48 49 MALLOC_DEFINE(M_GSSAPI, "GSS-API", "GSS-API"); 50 51 /* 52 * Syscall hooks 53 */ 54 static int gssd_syscall_offset = SYS_gssd_syscall; 55 static struct sysent gssd_syscall_prev_sysent; 56 MAKE_SYSENT(gssd_syscall); 57 static bool_t gssd_syscall_registered = FALSE; 58 59 struct kgss_mech_list kgss_mechs; 60 CLIENT *kgss_gssd_handle; 61 62 static void 63 kgss_init(void *dummy) 64 { 65 int error; 66 67 LIST_INIT(&kgss_mechs); 68 error = syscall_register(&gssd_syscall_offset, &gssd_syscall_sysent, 69 &gssd_syscall_prev_sysent); 70 if (error) 71 printf("Can't register GSSD syscall\n"); 72 else 73 gssd_syscall_registered = TRUE; 74 } 75 SYSINIT(kgss_init, SI_SUB_LOCK, SI_ORDER_FIRST, kgss_init, NULL); 76 77 static void 78 kgss_uninit(void *dummy) 79 { 80 81 if (gssd_syscall_registered) 82 syscall_deregister(&gssd_syscall_offset, 83 &gssd_syscall_prev_sysent); 84 } 85 SYSUNINIT(kgss_uninit, SI_SUB_LOCK, SI_ORDER_FIRST, kgss_uninit, NULL); 86 87 int 88 gssd_syscall(struct thread *td, struct gssd_syscall_args *uap) 89 { 90 struct sockaddr_un sun; 91 struct netconfig *nconf; 92 char path[MAXPATHLEN]; 93 int error; 94 95 error = priv_check(td, PRIV_NFS_DAEMON); 96 if (error) 97 return (error); 98 99 if (kgss_gssd_handle) 100 CLNT_DESTROY(kgss_gssd_handle); 101 102 error = copyinstr(uap->path, path, sizeof(path), NULL); 103 if (error) 104 return (error); 105 106 sun.sun_family = AF_LOCAL; 107 strcpy(sun.sun_path, path); 108 sun.sun_len = SUN_LEN(&sun); 109 110 nconf = getnetconfigent("local"); 111 kgss_gssd_handle = clnt_reconnect_create(nconf, 112 (struct sockaddr *) &sun, GSSD, GSSDVERS, 113 RPC_MAXDATASIZE, RPC_MAXDATASIZE); 114 115 return (0); 116 } 117 118 int 119 kgss_oid_equal(const gss_OID oid1, const gss_OID oid2) 120 { 121 122 if (oid1 == oid2) 123 return (1); 124 if (!oid1 || !oid2) 125 return (0); 126 if (oid1->length != oid2->length) 127 return (0); 128 if (memcmp(oid1->elements, oid2->elements, oid1->length)) 129 return (0); 130 return (1); 131 } 132 133 void 134 kgss_install_mech(gss_OID mech_type, const char *name, struct kobj_class *cls) 135 { 136 struct kgss_mech *km; 137 138 km = malloc(sizeof(struct kgss_mech), M_GSSAPI, M_WAITOK); 139 km->km_mech_type = mech_type; 140 km->km_mech_name = name; 141 km->km_class = cls; 142 LIST_INSERT_HEAD(&kgss_mechs, km, km_link); 143 } 144 145 void 146 kgss_uninstall_mech(gss_OID mech_type) 147 { 148 struct kgss_mech *km; 149 150 LIST_FOREACH(km, &kgss_mechs, km_link) { 151 if (kgss_oid_equal(km->km_mech_type, mech_type)) { 152 LIST_REMOVE(km, km_link); 153 free(km, M_GSSAPI); 154 return; 155 } 156 } 157 } 158 159 gss_OID 160 kgss_find_mech_by_name(const char *name) 161 { 162 struct kgss_mech *km; 163 164 LIST_FOREACH(km, &kgss_mechs, km_link) { 165 if (!strcmp(km->km_mech_name, name)) { 166 return (km->km_mech_type); 167 } 168 } 169 return (GSS_C_NO_OID); 170 } 171 172 const char * 173 kgss_find_mech_by_oid(const gss_OID oid) 174 { 175 struct kgss_mech *km; 176 177 LIST_FOREACH(km, &kgss_mechs, km_link) { 178 if (kgss_oid_equal(km->km_mech_type, oid)) { 179 return (km->km_mech_name); 180 } 181 } 182 return (NULL); 183 } 184 185 gss_ctx_id_t 186 kgss_create_context(gss_OID mech_type) 187 { 188 struct kgss_mech *km; 189 gss_ctx_id_t ctx; 190 191 LIST_FOREACH(km, &kgss_mechs, km_link) { 192 if (kgss_oid_equal(km->km_mech_type, mech_type)) 193 break; 194 } 195 if (!km) 196 return (NULL); 197 198 ctx = (gss_ctx_id_t) kobj_create(km->km_class, M_GSSAPI, M_WAITOK); 199 KGSS_INIT(ctx); 200 201 return (ctx); 202 } 203 204 void 205 kgss_delete_context(gss_ctx_id_t ctx, gss_buffer_t output_token) 206 { 207 208 KGSS_DELETE(ctx, output_token); 209 kobj_delete((kobj_t) ctx, M_GSSAPI); 210 } 211 212 OM_uint32 213 kgss_transfer_context(gss_ctx_id_t ctx) 214 { 215 struct export_sec_context_res res; 216 struct export_sec_context_args args; 217 enum clnt_stat stat; 218 OM_uint32 maj_stat; 219 220 if (!kgss_gssd_handle) 221 return (GSS_S_FAILURE); 222 223 args.ctx = ctx->handle; 224 bzero(&res, sizeof(res)); 225 stat = gssd_export_sec_context_1(&args, &res, kgss_gssd_handle); 226 if (stat != RPC_SUCCESS) { 227 return (GSS_S_FAILURE); 228 } 229 230 maj_stat = KGSS_IMPORT(ctx, res.format, &res.interprocess_token); 231 ctx->handle = 0; 232 233 xdr_free((xdrproc_t) xdr_export_sec_context_res, &res); 234 235 return (maj_stat); 236 } 237 238 void 239 kgss_copy_buffer(const gss_buffer_t from, gss_buffer_t to) 240 { 241 to->length = from->length; 242 if (from->length) { 243 to->value = malloc(from->length, M_GSSAPI, M_WAITOK); 244 bcopy(from->value, to->value, from->length); 245 } else { 246 to->value = NULL; 247 } 248 } 249 250 /* 251 * Kernel module glue 252 */ 253 static int 254 kgssapi_modevent(module_t mod, int type, void *data) 255 { 256 257 return (0); 258 } 259 static moduledata_t kgssapi_mod = { 260 "kgssapi", 261 kgssapi_modevent, 262 NULL, 263 }; 264 DECLARE_MODULE(kgssapi, kgssapi_mod, SI_SUB_VFS, SI_ORDER_ANY); 265 MODULE_DEPEND(kgssapi, krpc, 1, 1, 1); 266 MODULE_VERSION(kgssapi, 1); 267