1 /*- 2 * Copyright (c) 2008 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _RPCSEC_GSS_H 30 #define _RPCSEC_GSS_H 31 32 #include <kgssapi/gssapi.h> 33 34 #ifndef MAX_GSS_MECH 35 #define MAX_GSS_MECH 64 36 #endif 37 38 /* 39 * Define the types of security service required for rpc_gss_seccreate(). 40 */ 41 typedef enum { 42 rpc_gss_svc_default = 0, 43 rpc_gss_svc_none = 1, 44 rpc_gss_svc_integrity = 2, 45 rpc_gss_svc_privacy = 3 46 } rpc_gss_service_t; 47 48 /* 49 * Structure containing options for rpc_gss_seccreate(). 50 */ 51 typedef struct { 52 int req_flags; /* GSS request bits */ 53 int time_req; /* requested credential lifetime */ 54 gss_cred_id_t my_cred; /* GSS credential */ 55 gss_channel_bindings_t input_channel_bindings; 56 } rpc_gss_options_req_t; 57 58 /* 59 * Structure containing options returned by rpc_gss_seccreate(). 60 */ 61 typedef struct { 62 int major_status; 63 int minor_status; 64 u_int rpcsec_version; 65 int ret_flags; 66 int time_req; 67 gss_ctx_id_t gss_context; 68 char actual_mechanism[MAX_GSS_MECH]; 69 } rpc_gss_options_ret_t; 70 71 /* 72 * Client principal type. Used as an argument to 73 * rpc_gss_get_principal_name(). Also referenced by the 74 * rpc_gss_rawcred_t structure. 75 */ 76 typedef struct { 77 int len; 78 char name[1]; 79 } *rpc_gss_principal_t; 80 81 /* 82 * Structure for raw credentials used by rpc_gss_getcred() and 83 * rpc_gss_set_callback(). 84 */ 85 typedef struct { 86 u_int version; /* RPC version number */ 87 const char *mechanism; /* security mechanism */ 88 const char *qop; /* quality of protection */ 89 rpc_gss_principal_t client_principal; /* client name */ 90 const char *svc_principal; /* server name */ 91 rpc_gss_service_t service; /* service type */ 92 } rpc_gss_rawcred_t; 93 94 /* 95 * Unix credentials derived from raw credentials. Returned by 96 * rpc_gss_getcred(). 97 */ 98 typedef struct { 99 uid_t uid; /* user ID */ 100 gid_t gid; /* group ID */ 101 short gidlen; 102 gid_t *gidlist; /* list of groups */ 103 } rpc_gss_ucred_t; 104 105 /* 106 * Structure used to enforce a particular QOP and service. 107 */ 108 typedef struct { 109 bool_t locked; 110 rpc_gss_rawcred_t *raw_cred; 111 } rpc_gss_lock_t; 112 113 /* 114 * Callback structure used by rpc_gss_set_callback(). 115 */ 116 typedef struct { 117 u_int program; /* RPC program number */ 118 u_int version; /* RPC version number */ 119 /* user defined callback */ 120 bool_t (*callback)(struct svc_req *req, 121 gss_cred_id_t deleg, 122 gss_ctx_id_t gss_context, 123 rpc_gss_lock_t *lock, 124 void **cookie); 125 } rpc_gss_callback_t; 126 127 /* 128 * Structure used to return error information by rpc_gss_get_error() 129 */ 130 typedef struct { 131 int rpc_gss_error; 132 int system_error; /* same as errno */ 133 } rpc_gss_error_t; 134 135 /* 136 * Values for rpc_gss_error 137 */ 138 #define RPC_GSS_ER_SUCCESS 0 /* no error */ 139 #define RPC_GSS_ER_SYSTEMERROR 1 /* system error */ 140 141 __BEGIN_DECLS 142 143 #ifdef _KERNEL 144 /* 145 * Set up a structure of entry points for the kgssapi module and inline 146 * functions named rpc_gss_XXX_call() to use them, so that the kgssapi 147 * module doesn't need to be loaded for the NFS modules to work using 148 * AUTH_SYS. The kgssapi modules will be loaded by the gssd(8) daemon 149 * when it is started up and the entry points will then be filled in. 150 */ 151 typedef AUTH *rpc_gss_secfind_ftype(CLIENT *clnt, struct ucred *cred, 152 const char *principal, gss_OID mech_oid, 153 rpc_gss_service_t service); 154 typedef void rpc_gss_secpurge_ftype(CLIENT *clnt); 155 typedef AUTH *rpc_gss_seccreate_ftype(CLIENT *clnt, struct ucred *cred, 156 const char *clnt_principal, const char *principal, 157 const char *mechanism, rpc_gss_service_t service, 158 const char *qop, rpc_gss_options_req_t *options_req, 159 rpc_gss_options_ret_t *options_ret); 160 typedef bool_t rpc_gss_set_defaults_ftype(AUTH *auth, 161 rpc_gss_service_t service, const char *qop); 162 typedef int rpc_gss_max_data_length_ftype(AUTH *handle, 163 int max_tp_unit_len); 164 typedef void rpc_gss_get_error_ftype(rpc_gss_error_t *error); 165 typedef bool_t rpc_gss_mech_to_oid_ftype(const char *mech, gss_OID *oid_ret); 166 typedef bool_t rpc_gss_oid_to_mech_ftype(gss_OID oid, const char **mech_ret); 167 typedef bool_t rpc_gss_qop_to_num_ftype(const char *qop, const char *mech, 168 u_int *num_ret); 169 typedef const char **rpc_gss_get_mechanisms_ftype(void); 170 typedef bool_t rpc_gss_get_versions_ftype(u_int *vers_hi, u_int *vers_lo); 171 typedef bool_t rpc_gss_is_installed_ftype(const char *mech); 172 typedef bool_t rpc_gss_set_svc_name_ftype(const char *principal, 173 const char *mechanism, u_int req_time, u_int program, 174 u_int version); 175 typedef void rpc_gss_clear_svc_name_ftype(u_int program, u_int version); 176 typedef bool_t rpc_gss_getcred_ftype(struct svc_req *req, 177 rpc_gss_rawcred_t **rcred, 178 rpc_gss_ucred_t **ucred, void **cookie); 179 typedef bool_t rpc_gss_set_callback_ftype(rpc_gss_callback_t *cb); 180 typedef void rpc_gss_clear_callback_ftype(rpc_gss_callback_t *cb); 181 typedef bool_t rpc_gss_get_principal_name_ftype(rpc_gss_principal_t *principal, 182 const char *mech, const char *name, const char *node, 183 const char *domain); 184 typedef int rpc_gss_svc_max_data_length_ftype(struct svc_req *req, 185 int max_tp_unit_len); 186 typedef void rpc_gss_refresh_auth_ftype(AUTH *auth); 187 188 struct rpc_gss_entries { 189 rpc_gss_secfind_ftype *rpc_gss_secfind; 190 rpc_gss_secpurge_ftype *rpc_gss_secpurge; 191 rpc_gss_seccreate_ftype *rpc_gss_seccreate; 192 rpc_gss_set_defaults_ftype *rpc_gss_set_defaults; 193 rpc_gss_max_data_length_ftype *rpc_gss_max_data_length; 194 rpc_gss_get_error_ftype *rpc_gss_get_error; 195 rpc_gss_mech_to_oid_ftype *rpc_gss_mech_to_oid; 196 rpc_gss_oid_to_mech_ftype *rpc_gss_oid_to_mech; 197 rpc_gss_qop_to_num_ftype *rpc_gss_qop_to_num; 198 rpc_gss_get_mechanisms_ftype *rpc_gss_get_mechanisms; 199 rpc_gss_get_versions_ftype *rpc_gss_get_versions; 200 rpc_gss_is_installed_ftype *rpc_gss_is_installed; 201 rpc_gss_set_svc_name_ftype *rpc_gss_set_svc_name; 202 rpc_gss_clear_svc_name_ftype *rpc_gss_clear_svc_name; 203 rpc_gss_getcred_ftype *rpc_gss_getcred; 204 rpc_gss_set_callback_ftype *rpc_gss_set_callback; 205 rpc_gss_clear_callback_ftype *rpc_gss_clear_callback; 206 rpc_gss_get_principal_name_ftype *rpc_gss_get_principal_name; 207 rpc_gss_svc_max_data_length_ftype *rpc_gss_svc_max_data_length; 208 rpc_gss_refresh_auth_ftype *rpc_gss_refresh_auth; 209 }; 210 extern struct rpc_gss_entries rpc_gss_entries; 211 212 /* Functions to access the entry points. */ 213 static __inline AUTH * 214 rpc_gss_secfind_call(CLIENT *clnt, struct ucred *cred, const char *principal, 215 gss_OID mech_oid, rpc_gss_service_t service) 216 { 217 AUTH *ret = NULL; 218 219 if (rpc_gss_entries.rpc_gss_secfind != NULL) 220 ret = (*rpc_gss_entries.rpc_gss_secfind)(clnt, cred, principal, 221 mech_oid, service); 222 return (ret); 223 } 224 225 static __inline void 226 rpc_gss_secpurge_call(CLIENT *clnt) 227 { 228 229 if (rpc_gss_entries.rpc_gss_secpurge != NULL) 230 (*rpc_gss_entries.rpc_gss_secpurge)(clnt); 231 } 232 233 static __inline AUTH * 234 rpc_gss_seccreate_call(CLIENT *clnt, struct ucred *cred, 235 const char *clnt_principal, const char *principal, const char *mechanism, 236 rpc_gss_service_t service, const char *qop, 237 rpc_gss_options_req_t *options_req, rpc_gss_options_ret_t *options_ret) 238 { 239 AUTH *ret = NULL; 240 241 if (rpc_gss_entries.rpc_gss_seccreate != NULL) 242 ret = (*rpc_gss_entries.rpc_gss_seccreate)(clnt, cred, 243 clnt_principal, principal, mechanism, service, qop, 244 options_req, options_ret); 245 return (ret); 246 } 247 248 static __inline bool_t 249 rpc_gss_set_defaults_call(AUTH *auth, rpc_gss_service_t service, 250 const char *qop) 251 { 252 bool_t ret = 1; 253 254 if (rpc_gss_entries.rpc_gss_set_defaults != NULL) 255 ret = (*rpc_gss_entries.rpc_gss_set_defaults)(auth, service, 256 qop); 257 return (ret); 258 } 259 260 static __inline int 261 rpc_gss_max_data_length_call(AUTH *handle, int max_tp_unit_len) 262 { 263 int ret = 0; 264 265 if (rpc_gss_entries.rpc_gss_max_data_length != NULL) 266 ret = (*rpc_gss_entries.rpc_gss_max_data_length)(handle, 267 max_tp_unit_len); 268 return (ret); 269 } 270 271 static __inline void 272 rpc_gss_get_error_call(rpc_gss_error_t *error) 273 { 274 275 if (rpc_gss_entries.rpc_gss_get_error != NULL) 276 (*rpc_gss_entries.rpc_gss_get_error)(error); 277 } 278 279 static __inline bool_t 280 rpc_gss_mech_to_oid_call(const char *mech, gss_OID *oid_ret) 281 { 282 bool_t ret = 1; 283 284 if (rpc_gss_entries.rpc_gss_mech_to_oid != NULL) 285 ret = (*rpc_gss_entries.rpc_gss_mech_to_oid)(mech, oid_ret); 286 return (ret); 287 } 288 289 static __inline bool_t 290 rpc_gss_oid_to_mech_call(gss_OID oid, const char **mech_ret) 291 { 292 bool_t ret = 1; 293 294 if (rpc_gss_entries.rpc_gss_oid_to_mech != NULL) 295 ret = (*rpc_gss_entries.rpc_gss_oid_to_mech)(oid, mech_ret); 296 return (ret); 297 } 298 299 static __inline bool_t 300 rpc_gss_qop_to_num_call(const char *qop, const char *mech, u_int *num_ret) 301 { 302 bool_t ret = 1; 303 304 if (rpc_gss_entries.rpc_gss_qop_to_num != NULL) 305 ret = (*rpc_gss_entries.rpc_gss_qop_to_num)(qop, mech, num_ret); 306 return (ret); 307 } 308 309 static __inline const char ** 310 rpc_gss_get_mechanisms_call(void) 311 { 312 const char **ret = NULL; 313 314 if (rpc_gss_entries.rpc_gss_get_mechanisms != NULL) 315 ret = (*rpc_gss_entries.rpc_gss_get_mechanisms)(); 316 return (ret); 317 } 318 319 static __inline bool_t 320 rpc_gss_get_versions_call(u_int *vers_hi, u_int *vers_lo) 321 { 322 bool_t ret = 1; 323 324 if (rpc_gss_entries.rpc_gss_get_versions != NULL) 325 ret = (*rpc_gss_entries.rpc_gss_get_versions)(vers_hi, vers_lo); 326 return (ret); 327 } 328 329 static __inline bool_t 330 rpc_gss_is_installed_call(const char *mech) 331 { 332 bool_t ret = 1; 333 334 if (rpc_gss_entries.rpc_gss_is_installed != NULL) 335 ret = (*rpc_gss_entries.rpc_gss_is_installed)(mech); 336 return (ret); 337 } 338 339 static __inline bool_t 340 rpc_gss_set_svc_name_call(const char *principal, const char *mechanism, 341 u_int req_time, u_int program, u_int version) 342 { 343 bool_t ret = 1; 344 345 if (rpc_gss_entries.rpc_gss_set_svc_name != NULL) 346 ret = (*rpc_gss_entries.rpc_gss_set_svc_name)(principal, 347 mechanism, req_time, program, version); 348 return (ret); 349 } 350 351 static __inline void 352 rpc_gss_clear_svc_name_call(u_int program, u_int version) 353 { 354 355 if (rpc_gss_entries.rpc_gss_clear_svc_name != NULL) 356 (*rpc_gss_entries.rpc_gss_clear_svc_name)(program, version); 357 } 358 359 static __inline bool_t 360 rpc_gss_getcred_call(struct svc_req *req, rpc_gss_rawcred_t **rcred, 361 rpc_gss_ucred_t **ucred, void **cookie) 362 { 363 bool_t ret = 1; 364 365 if (rpc_gss_entries.rpc_gss_getcred != NULL) 366 ret = (*rpc_gss_entries.rpc_gss_getcred)(req, rcred, ucred, 367 cookie); 368 return (ret); 369 } 370 371 static __inline bool_t 372 rpc_gss_set_callback_call(rpc_gss_callback_t *cb) 373 { 374 bool_t ret = 1; 375 376 if (rpc_gss_entries.rpc_gss_set_callback != NULL) 377 ret = (*rpc_gss_entries.rpc_gss_set_callback)(cb); 378 return (ret); 379 } 380 381 static __inline void 382 rpc_gss_clear_callback_call(rpc_gss_callback_t *cb) 383 { 384 385 if (rpc_gss_entries.rpc_gss_clear_callback != NULL) 386 (*rpc_gss_entries.rpc_gss_clear_callback)(cb); 387 } 388 389 static __inline bool_t 390 rpc_gss_get_principal_name_call(rpc_gss_principal_t *principal, 391 const char *mech, const char *name, const char *node, const char *domain) 392 { 393 bool_t ret = 1; 394 395 if (rpc_gss_entries.rpc_gss_get_principal_name != NULL) 396 ret = (*rpc_gss_entries.rpc_gss_get_principal_name)(principal, 397 mech, name, node, domain); 398 return (ret); 399 } 400 401 static __inline int 402 rpc_gss_svc_max_data_length_call(struct svc_req *req, int max_tp_unit_len) 403 { 404 int ret = 0; 405 406 if (rpc_gss_entries.rpc_gss_svc_max_data_length != NULL) 407 ret = (*rpc_gss_entries.rpc_gss_svc_max_data_length)(req, 408 max_tp_unit_len); 409 return (ret); 410 } 411 412 static __inline void 413 rpc_gss_refresh_auth_call(AUTH *auth) 414 { 415 416 if (rpc_gss_entries.rpc_gss_refresh_auth != NULL) 417 (*rpc_gss_entries.rpc_gss_refresh_auth)(auth); 418 } 419 420 AUTH *rpc_gss_secfind(CLIENT *clnt, struct ucred *cred, 421 const char *principal, gss_OID mech_oid, rpc_gss_service_t service); 422 void rpc_gss_secpurge(CLIENT *clnt); 423 void rpc_gss_refresh_auth(AUTH *auth); 424 AUTH *rpc_gss_seccreate(CLIENT *clnt, struct ucred *cred, 425 const char *clnt_principal, const char *principal, 426 const char *mechanism, rpc_gss_service_t service, 427 const char *qop, rpc_gss_options_req_t *options_req, 428 rpc_gss_options_ret_t *options_ret); 429 #else /* !_KERNEL */ 430 AUTH *rpc_gss_seccreate(CLIENT *clnt, struct ucred *cred, 431 const char *principal, const char *mechanism, rpc_gss_service_t service, 432 const char *qop, rpc_gss_options_req_t *options_req, 433 rpc_gss_options_ret_t *options_ret); 434 #endif /* _KERNEL */ 435 bool_t rpc_gss_set_defaults(AUTH *auth, rpc_gss_service_t service, 436 const char *qop); 437 int rpc_gss_max_data_length(AUTH *handle, int max_tp_unit_len); 438 void rpc_gss_get_error(rpc_gss_error_t *error); 439 440 bool_t rpc_gss_mech_to_oid(const char *mech, gss_OID *oid_ret); 441 bool_t rpc_gss_oid_to_mech(gss_OID oid, const char **mech_ret); 442 bool_t rpc_gss_qop_to_num(const char *qop, const char *mech, u_int *num_ret); 443 const char **rpc_gss_get_mechanisms(void); 444 const char **rpc_gss_get_mech_info(const char *mech, rpc_gss_service_t *service); 445 bool_t rpc_gss_get_versions(u_int *vers_hi, u_int *vers_lo); 446 bool_t rpc_gss_is_installed(const char *mech); 447 448 bool_t rpc_gss_set_svc_name(const char *principal, const char *mechanism, 449 u_int req_time, u_int program, u_int version); 450 void rpc_gss_clear_svc_name(u_int program, u_int version); 451 bool_t rpc_gss_getcred(struct svc_req *req, rpc_gss_rawcred_t **rcred, 452 rpc_gss_ucred_t **ucred, void **cookie); 453 bool_t rpc_gss_set_callback(rpc_gss_callback_t *cb); 454 void rpc_gss_clear_callback(rpc_gss_callback_t *cb); 455 bool_t rpc_gss_get_principal_name(rpc_gss_principal_t *principal, 456 const char *mech, const char *name, const char *node, const char *domain); 457 int rpc_gss_svc_max_data_length(struct svc_req *req, int max_tp_unit_len); 458 459 /* 460 * Internal interface from the RPC implementation. 461 */ 462 #ifndef _KERNEL 463 bool_t __rpc_gss_wrap(AUTH *auth, void *header, size_t headerlen, 464 XDR* xdrs, xdrproc_t xdr_args, void *args_ptr); 465 bool_t __rpc_gss_unwrap(AUTH *auth, XDR* xdrs, xdrproc_t xdr_args, 466 void *args_ptr); 467 #endif 468 bool_t __rpc_gss_set_error(int rpc_gss_error, int system_error); 469 470 __END_DECLS 471 472 #endif /* !_RPCSEC_GSS_H */ 473