include/rpc/auth.h

   1 /*      $NetBSD: auth.h,v 1.15 2000/06/02 22:57:55 fvdl Exp $   */
   2
   3 /*-
   4  * Copyright (c) 2009, Sun Microsystems, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are met:
   9  * - Redistributions of source code must retain the above copyright notice,
  10  *   this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright notice,
  12  *   this list of conditions and the following disclaimer in the documentation
  13  *   and/or other materials provided with the distribution.
  14  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  15  *   contributors may be used to endorse or promote products derived
  16  *   from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  *      from: @(#)auth.h 1.17 88/02/08 SMI
  31  *      from: @(#)auth.h        2.3 88/08/07 4.0 RPCSRC
  32  *      from: @(#)auth.h        1.43    98/02/02 SMI
  33  * $NetBSD: auth.h,v 1.15 2000/06/02 22:57:55 fvdl Exp $
  34  * $FreeBSD: src/include/rpc/auth.h,v 1.21 2006/02/28 16:02:26 deischen Exp $
  35  * $DragonFly: src/include/rpc/auth.h,v 1.4 2004/02/26 13:58:26 joerg Exp $
  36  */
  37
  38 /*
  39  * auth.h, Authentication interface.
  40  *
  41  * Copyright (C) 1984, Sun Microsystems, Inc.
  42  *
  43  * The data structures are completely opaque to the client.  The client
  44  * is required to pass an AUTH * to routines that create rpc
  45  * "sessions".
  46  */
  47
  48 #ifndef _RPC_AUTH_H
  49 #define _RPC_AUTH_H
  50 #include <rpc/xdr.h>
  51 #include <rpc/clnt_stat.h>
  52 #include <sys/cdefs.h>
  53 #include <sys/socket.h>
  54
  55 #define MAX_AUTH_BYTES  400
  56 #define MAXNETNAMELEN   255     /* maximum length of network user's name */
  57
  58 /*
  59  *  Client side authentication/security data
  60  */
  61
  62 typedef struct sec_data {
  63         u_int   secmod;         /* security mode number e.g. in nfssec.conf */
  64         u_int   rpcflavor;      /* rpc flavors:AUTH_UNIX,AUTH_DES,RPCSEC_GSS */
  65         int     flags;          /* AUTH_F_xxx flags */
  66         caddr_t data;           /* opaque data per flavor */
  67 } sec_data_t;
  68
  69 #ifdef _SYSCALL32_IMPL
  70 struct sec_data32 {
  71         uint32_t secmod;        /* security mode number e.g. in nfssec.conf */
  72         uint32_t rpcflavor;     /* rpc flavors:AUTH_UNIX,AUTH_DES,RPCSEC_GSS */
  73         int32_t flags;          /* AUTH_F_xxx flags */
  74         caddr32_t data;         /* opaque data per flavor */
  75 };
  76 #endif /* _SYSCALL32_IMPL */
  77
  78 /*
  79  * AUTH_DES flavor specific data from sec_data opaque data field.
  80  * AUTH_KERB has the same structure.
  81  */
  82 typedef struct des_clnt_data {
  83         struct netbuf   syncaddr;       /* time sync addr */
  84         struct knetconfig *knconf;      /* knetconfig info that associated */
  85                                         /* with the syncaddr. */
  86         char            *netname;       /* server's netname */
  87         int             netnamelen;     /* server's netname len */
  88 } dh_k4_clntdata_t;
  89
  90 #ifdef _SYSCALL32_IMPL
  91 struct des_clnt_data32 {
  92         struct netbuf32 syncaddr;       /* time sync addr */
  93         caddr32_t knconf;               /* knetconfig info that associated */
  94                                         /* with the syncaddr. */
  95         caddr32_t netname;              /* server's netname */
  96         int32_t netnamelen;             /* server's netname len */
  97 };
  98 #endif /* _SYSCALL32_IMPL */
  99
 100 #ifdef KERBEROS
 101 /*
 102  * flavor specific data to hold the data for AUTH_DES/AUTH_KERB(v4)
 103  * in sec_data->data opaque field.
 104  */
 105 typedef struct krb4_svc_data {
 106         int             window;         /* window option value */
 107 } krb4_svcdata_t;
 108
 109 typedef struct krb4_svc_data    des_svcdata_t;
 110 #endif /* KERBEROS */
 111
 112 /*
 113  * authentication/security specific flags
 114  */
 115 #define AUTH_F_RPCTIMESYNC      0x001   /* use RPC to do time sync */
 116 #define AUTH_F_TRYNONE          0x002   /* allow fall back to AUTH_NONE */
 117
 118
 119 /*
 120  * Status returned from authentication check
 121  */
 122 enum auth_stat {
 123         AUTH_OK=0,
 124         /*
 125          * failed at remote end
 126          */
 127         AUTH_BADCRED=1,                 /* bogus credentials (seal broken) */
 128         AUTH_REJECTEDCRED=2,            /* client should begin new session */
 129         AUTH_BADVERF=3,                 /* bogus verifier (seal broken) */
 130         AUTH_REJECTEDVERF=4,            /* verifier expired or was replayed */
 131         AUTH_TOOWEAK=5,                 /* rejected due to security reasons */
 132         /*
 133          * failed locally
 134         */
 135         AUTH_INVALIDRESP=6,             /* bogus response verifier */
 136         AUTH_FAILED=7                   /* some unknown reason */
 137 #ifdef KERBEROS
 138         /*
 139          * kerberos errors
 140          */
 141         ,
 142         AUTH_KERB_GENERIC = 8,          /* kerberos generic error */
 143         AUTH_TIMEEXPIRE = 9,            /* time of credential expired */
 144         AUTH_TKT_FILE = 10,             /* something wrong with ticket file */
 145         AUTH_DECODE = 11,               /* can't decode authenticator */
 146         AUTH_NET_ADDR = 12              /* wrong net address in ticket */
 147 #endif /* KERBEROS */
 148 };
 149
 150 union des_block {
 151         struct {
 152                 uint32_t high;
 153                 uint32_t low;
 154         } key;
 155         char c[8];
 156 };
 157 typedef union des_block des_block;
 158 __BEGIN_DECLS
 159 bool_t  xdr_des_block(XDR *, des_block *);
 160 __END_DECLS
 161
 162 /*
 163  * Authentication info.  Opaque to client.
 164  */
 165 struct opaque_auth {
 166         enum_t  oa_flavor;              /* flavor of auth */
 167         caddr_t oa_base;                /* address of more auth stuff */
 168         u_int   oa_length;              /* not to exceed MAX_AUTH_BYTES */
 169 };
 170
 171
 172 /*
 173  * Auth handle, interface to client side authenticators.
 174  */
 175 typedef struct __auth {
 176         struct  opaque_auth     ah_cred;
 177         struct  opaque_auth     ah_verf;
 178         union   des_block       ah_key;
 179         struct auth_ops {
 180                 void    (*ah_nextverf) (struct __auth *);
 181                 /* nextverf & serialize */
 182                 int     (*ah_marshal) (struct __auth *, XDR *);
 183                 /* validate verifier */
 184                 int     (*ah_validate) (struct __auth *,
 185                                 struct opaque_auth *);
 186                 /* refresh credentials */
 187                 int     (*ah_refresh) (struct __auth *, void *);
 188                 /* destroy this structure */
 189                 void    (*ah_destroy) (struct __auth *);
 190         } *ah_ops;
 191         void *ah_private;
 192 } AUTH;
 193
 194
 195 /*
 196  * Authentication ops.
 197  * The ops and the auth handle provide the interface to the authenticators.
 198  *
 199  * AUTH *auth;
 200  * XDR  *xdrs;
 201  * struct opaque_auth verf;
 202  */
 203 #define AUTH_NEXTVERF(auth)             \
 204                 ((*((auth)->ah_ops->ah_nextverf))(auth))
 205 #define auth_nextverf(auth)             \
 206                 ((*((auth)->ah_ops->ah_nextverf))(auth))
 207
 208 #define AUTH_MARSHALL(auth, xdrs)       \
 209                 ((*((auth)->ah_ops->ah_marshal))(auth, xdrs))
 210 #define auth_marshall(auth, xdrs)       \
 211                 ((*((auth)->ah_ops->ah_marshal))(auth, xdrs))
 212
 213 #define AUTH_VALIDATE(auth, verfp)      \
 214                 ((*((auth)->ah_ops->ah_validate))((auth), verfp))
 215 #define auth_validate(auth, verfp)      \
 216                 ((*((auth)->ah_ops->ah_validate))((auth), verfp))
 217
 218 #define AUTH_REFRESH(auth, msg)         \
 219                 ((*((auth)->ah_ops->ah_refresh))(auth, msg))
 220 #define auth_refresh(auth, msg)         \
 221                 ((*((auth)->ah_ops->ah_refresh))(auth, msg))
 222
 223 #define AUTH_DESTROY(auth)              \
 224                 ((*((auth)->ah_ops->ah_destroy))(auth))
 225 #define auth_destroy(auth)              \
 226                 ((*((auth)->ah_ops->ah_destroy))(auth))
 227
 228
 229 __BEGIN_DECLS
 230 extern struct opaque_auth _null_auth;
 231 __END_DECLS
 232
 233 /*
 234  * These are the various implementations of client side authenticators.
 235  */
 236
 237 /*
 238  * System style authentication
 239  * AUTH *authunix_create(machname, uid, gid, len, aup_gids)
 240  *      char *machname;
 241  *      int uid;
 242  *      int gid;
 243  *      int len;
 244  *      int *aup_gids;
 245  */
 246 __BEGIN_DECLS
 247 AUTH    *authunix_create(char *, int, int, int, int *);
 248 AUTH    *authunix_create_default(void);
 249 AUTH    *authnone_create(void);
 250 __END_DECLS
 251 /*
 252  * DES style authentication
 253  * AUTH *authsecdes_create(servername, window, timehost, ckey)
 254  *      char *servername;               - network name of server
 255  *      u_int window;                   - time to live
 256  *      const char *timehost;           - optional hostname to sync with
 257  *      des_block *ckey;                - optional conversation key to use
 258  */
 259 __BEGIN_DECLS
 260 AUTH    *authdes_create(char *, u_int, struct sockaddr *, des_block *);
 261 AUTH    *authdes_seccreate(const char *, const u_int, const char *,
 262                            const des_block *);
 263 __END_DECLS
 264
 265 __BEGIN_DECLS
 266 bool_t  xdr_opaque_auth(XDR *, struct opaque_auth *);
 267 __END_DECLS
 268
 269 #define authsys_create(c,i1,i2,i3,ip) authunix_create((c),(i1),(i2),(i3),(ip))
 270 #define authsys_create_default() authunix_create_default()
 271
 272 /*
 273  * Netname manipulation routines.
 274  */
 275 __BEGIN_DECLS
 276 int     getnetname(char *);
 277 int     host2netname(char *, const char *, const char *);
 278 int     user2netname(char *, const uid_t, const char *);
 279 int     netname2user(char *, uid_t *, gid_t *, int *, gid_t *);
 280 int     netname2host(char *, char *, const int);
 281 void    passwd2des(char *, char *);
 282 __END_DECLS
 283
 284 /*
 285  *
 286  * These routines interface to the keyserv daemon
 287  *
 288  */
 289 __BEGIN_DECLS
 290 int     key_decryptsession(const char *, des_block *);
 291 int     key_encryptsession(const char *, des_block *);
 292 int     key_gendes(des_block *);
 293 int     key_setsecret(const char *);
 294 int     key_secretkey_is_set(void);
 295 __END_DECLS
 296
 297 /*
 298  * Publickey routines.
 299  */
 300 __BEGIN_DECLS
 301 int     getpublickey(const char *, char *);
 302 int     getpublicandprivatekey(const char *, char *);
 303 int     getsecretkey(char *, char *, char *);
 304 __END_DECLS
 305
 306 #ifdef KERBEROS
 307 /*
 308  * Kerberos style authentication
 309  * AUTH *authkerb_seccreate(service, srv_inst, realm, window, timehost, status)
 310  *      const char *service;                    - service name
 311  *      const char *srv_inst;                   - server instance
 312  *      const char *realm;                      - server realm
 313  *      const u_int window;                     - time to live
 314  *      const char *timehost;                   - optional hostname to sync with
 315  *      int *status;                            - kerberos status returned
 316  */
 317 __BEGIN_DECLS
 318 AUTH    *authkerb_seccreate(const char *, const char *, const char *,
 319                             const u_int, const char *, int *);
 320 __END_DECLS
 321
 322 /*
 323  * Map a kerberos credential into a unix cred.
 324  *
 325  *      authkerb_getucred(rqst, uid, gid, grouplen, groups)
 326  *      const struct svc_req *rqst;             - request pointer
 327  *      uid_t *uid;
 328  *      gid_t *gid;
 329  *      short *grouplen;
 330  *      int *groups;
 331  *
 332  */
 333 __BEGIN_DECLS
 334 int     authkerb_getucred(/* struct svc_req *, uid_t *, gid_t *,
 335                           short *, int * */);
 336 __END_DECLS
 337 #endif /* KERBEROS */
 338
 339 __BEGIN_DECLS
 340 struct svc_req;
 341 struct rpc_msg;
 342 enum auth_stat _svcauth_null (struct svc_req *, struct rpc_msg *);
 343 enum auth_stat _svcauth_short (struct svc_req *, struct rpc_msg *);
 344 enum auth_stat _svcauth_unix (struct svc_req *, struct rpc_msg *);
 345 __END_DECLS
 346
 347 #define AUTH_NONE       0               /* no authentication */
 348 #define AUTH_NULL       0               /* backward compatibility */
 349 #define AUTH_SYS        1               /* unix style (uid, gids) */
 350 #define AUTH_UNIX       AUTH_SYS
 351 #define AUTH_SHORT      2               /* short hand unix style */
 352 #define AUTH_DH         3               /* for Diffie-Hellman mechanism */
 353 #define AUTH_DES        AUTH_DH         /* for backward compatibility */
 354 #define AUTH_KERB       4               /* kerberos style */
 355
 356 #endif /* !_RPC_AUTH_H */