include/rpc/auth.h

   1 /*
   2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   3  * unrestricted use provided that this legend is included on all tape
   4  * media and as a part of the software program in whole or part.  Users
   5  * may copy or modify Sun RPC without charge, but are not authorized
   6  * to license or distribute it to anyone else except as part of a product or
   7  * program developed by the user.
   8  *
   9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10  * WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12  *
  13  * Sun RPC is provided with no support and without any obligation on the
  14  * part of Sun Microsystems, Inc. to assist in its use, correction,
  15  * modification or enhancement.
  16  *
  17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19  * OR ANY PART THEREOF.
  20  *
  21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22  * or profits or other special, indirect and consequential damages, even if
  23  * Sun has been advised of the possibility of such damages.
  24  *
  25  * Sun Microsystems, Inc.
  26  * 2550 Garcia Avenue
  27  * Mountain View, California  94043
  28  *
  29  *      from: @(#)auth.h 1.17 88/02/08 SMI
  30  *      from: @(#)auth.h        2.3 88/08/07 4.0 RPCSRC
  31  *      from: @(#)auth.h        1.43    98/02/02 SMI
  32  * $NetBSD: auth.h,v 1.15 2000/06/02 22:57:55 fvdl Exp $
  33  * $FreeBSD: src/include/rpc/auth.h,v 1.21 2006/02/28 16:02:26 deischen Exp $
  34  * $DragonFly: src/include/rpc/auth.h,v 1.4 2004/02/26 13:58:26 joerg Exp $
  35  */
  36
  37 /*
  38  * auth.h, Authentication interface.
  39  *
  40  * Copyright (C) 1984, Sun Microsystems, Inc.
  41  *
  42  * The data structures are completely opaque to the client.  The client
  43  * is required to pass an AUTH * to routines that create rpc
  44  * "sessions".
  45  */
  46
  47 #ifndef _RPC_AUTH_H
  48 #define _RPC_AUTH_H
  49 #include <rpc/xdr.h>
  50 #include <rpc/clnt_stat.h>
  51 #include <sys/cdefs.h>
  52 #include <sys/socket.h>
  53
  54 #define MAX_AUTH_BYTES  400
  55 #define MAXNETNAMELEN   255     /* maximum length of network user's name */
  56
  57 /*
  58  *  Client side authentication/security data
  59  */
  60
  61 typedef struct sec_data {
  62         u_int   secmod;         /* security mode number e.g. in nfssec.conf */
  63         u_int   rpcflavor;      /* rpc flavors:AUTH_UNIX,AUTH_DES,RPCSEC_GSS */
  64         int     flags;          /* AUTH_F_xxx flags */
  65         caddr_t data;           /* opaque data per flavor */
  66 } sec_data_t;
  67
  68 #ifdef _SYSCALL32_IMPL
  69 struct sec_data32 {
  70         uint32_t secmod;        /* security mode number e.g. in nfssec.conf */
  71         uint32_t rpcflavor;     /* rpc flavors:AUTH_UNIX,AUTH_DES,RPCSEC_GSS */
  72         int32_t flags;          /* AUTH_F_xxx flags */
  73         caddr32_t data;         /* opaque data per flavor */
  74 };
  75 #endif /* _SYSCALL32_IMPL */
  76
  77 /*
  78  * AUTH_DES flavor specific data from sec_data opaque data field.
  79  * AUTH_KERB has the same structure.
  80  */
  81 typedef struct des_clnt_data {
  82         struct netbuf   syncaddr;       /* time sync addr */
  83         struct knetconfig *knconf;      /* knetconfig info that associated */
  84                                         /* with the syncaddr. */
  85         char            *netname;       /* server's netname */
  86         int             netnamelen;     /* server's netname len */
  87 } dh_k4_clntdata_t;
  88
  89 #ifdef _SYSCALL32_IMPL
  90 struct des_clnt_data32 {
  91         struct netbuf32 syncaddr;       /* time sync addr */
  92         caddr32_t knconf;               /* knetconfig info that associated */
  93                                         /* with the syncaddr. */
  94         caddr32_t netname;              /* server's netname */
  95         int32_t netnamelen;             /* server's netname len */
  96 };
  97 #endif /* _SYSCALL32_IMPL */
  98
  99 #ifdef KERBEROS
 100 /*
 101  * flavor specific data to hold the data for AUTH_DES/AUTH_KERB(v4)
 102  * in sec_data->data opaque field.
 103  */
 104 typedef struct krb4_svc_data {
 105         int             window;         /* window option value */
 106 } krb4_svcdata_t;
 107
 108 typedef struct krb4_svc_data    des_svcdata_t;
 109 #endif /* KERBEROS */
 110
 111 /*
 112  * authentication/security specific flags
 113  */
 114 #define AUTH_F_RPCTIMESYNC      0x001   /* use RPC to do time sync */
 115 #define AUTH_F_TRYNONE          0x002   /* allow fall back to AUTH_NONE */
 116
 117
 118 /*
 119  * Status returned from authentication check
 120  */
 121 enum auth_stat {
 122         AUTH_OK=0,
 123         /*
 124          * failed at remote end
 125          */
 126         AUTH_BADCRED=1,                 /* bogus credentials (seal broken) */
 127         AUTH_REJECTEDCRED=2,            /* client should begin new session */
 128         AUTH_BADVERF=3,                 /* bogus verifier (seal broken) */
 129         AUTH_REJECTEDVERF=4,            /* verifier expired or was replayed */
 130         AUTH_TOOWEAK=5,                 /* rejected due to security reasons */
 131         /*
 132          * failed locally
 133         */
 134         AUTH_INVALIDRESP=6,             /* bogus response verifier */
 135         AUTH_FAILED=7                   /* some unknown reason */
 136 #ifdef KERBEROS
 137         /*
 138          * kerberos errors
 139          */
 140         ,
 141         AUTH_KERB_GENERIC = 8,          /* kerberos generic error */
 142         AUTH_TIMEEXPIRE = 9,            /* time of credential expired */
 143         AUTH_TKT_FILE = 10,             /* something wrong with ticket file */
 144         AUTH_DECODE = 11,               /* can't decode authenticator */
 145         AUTH_NET_ADDR = 12              /* wrong net address in ticket */
 146 #endif /* KERBEROS */
 147 };
 148
 149 union des_block {
 150         struct {
 151                 uint32_t high;
 152                 uint32_t low;
 153         } key;
 154         char c[8];
 155 };
 156 typedef union des_block des_block;
 157 __BEGIN_DECLS
 158 bool_t  xdr_des_block(XDR *, des_block *);
 159 __END_DECLS
 160
 161 /*
 162  * Authentication info.  Opaque to client.
 163  */
 164 struct opaque_auth {
 165         enum_t  oa_flavor;              /* flavor of auth */
 166         caddr_t oa_base;                /* address of more auth stuff */
 167         u_int   oa_length;              /* not to exceed MAX_AUTH_BYTES */
 168 };
 169
 170
 171 /*
 172  * Auth handle, interface to client side authenticators.
 173  */
 174 typedef struct __auth {
 175         struct  opaque_auth     ah_cred;
 176         struct  opaque_auth     ah_verf;
 177         union   des_block       ah_key;
 178         struct auth_ops {
 179                 void    (*ah_nextverf) (struct __auth *);
 180                 /* nextverf & serialize */
 181                 int     (*ah_marshal) (struct __auth *, XDR *);
 182                 /* validate verifier */
 183                 int     (*ah_validate) (struct __auth *,
 184                                 struct opaque_auth *);
 185                 /* refresh credentials */
 186                 int     (*ah_refresh) (struct __auth *, void *);
 187                 /* destroy this structure */
 188                 void    (*ah_destroy) (struct __auth *);
 189         } *ah_ops;
 190         void *ah_private;
 191 } AUTH;
 192
 193
 194 /*
 195  * Authentication ops.
 196  * The ops and the auth handle provide the interface to the authenticators.
 197  *
 198  * AUTH *auth;
 199  * XDR  *xdrs;
 200  * struct opaque_auth verf;
 201  */
 202 #define AUTH_NEXTVERF(auth)             \
 203                 ((*((auth)->ah_ops->ah_nextverf))(auth))
 204 #define auth_nextverf(auth)             \
 205                 ((*((auth)->ah_ops->ah_nextverf))(auth))
 206
 207 #define AUTH_MARSHALL(auth, xdrs)       \
 208                 ((*((auth)->ah_ops->ah_marshal))(auth, xdrs))
 209 #define auth_marshall(auth, xdrs)       \
 210                 ((*((auth)->ah_ops->ah_marshal))(auth, xdrs))
 211
 212 #define AUTH_VALIDATE(auth, verfp)      \
 213                 ((*((auth)->ah_ops->ah_validate))((auth), verfp))
 214 #define auth_validate(auth, verfp)      \
 215                 ((*((auth)->ah_ops->ah_validate))((auth), verfp))
 216
 217 #define AUTH_REFRESH(auth, msg)         \
 218                 ((*((auth)->ah_ops->ah_refresh))(auth, msg))
 219 #define auth_refresh(auth, msg)         \
 220                 ((*((auth)->ah_ops->ah_refresh))(auth, msg))
 221
 222 #define AUTH_DESTROY(auth)              \
 223                 ((*((auth)->ah_ops->ah_destroy))(auth))
 224 #define auth_destroy(auth)              \
 225                 ((*((auth)->ah_ops->ah_destroy))(auth))
 226
 227
 228 __BEGIN_DECLS
 229 extern struct opaque_auth _null_auth;
 230 __END_DECLS
 231
 232 /*
 233  * These are the various implementations of client side authenticators.
 234  */
 235
 236 /*
 237  * System style authentication
 238  * AUTH *authunix_create(machname, uid, gid, len, aup_gids)
 239  *      char *machname;
 240  *      int uid;
 241  *      int gid;
 242  *      int len;
 243  *      int *aup_gids;
 244  */
 245 __BEGIN_DECLS
 246 AUTH    *authunix_create(char *, int, int, int, int *);
 247 AUTH    *authunix_create_default(void);
 248 AUTH    *authnone_create(void);
 249 __END_DECLS
 250 /*
 251  * DES style authentication
 252  * AUTH *authsecdes_create(servername, window, timehost, ckey)
 253  *      char *servername;               - network name of server
 254  *      u_int window;                   - time to live
 255  *      const char *timehost;           - optional hostname to sync with
 256  *      des_block *ckey;                - optional conversation key to use
 257  */
 258 __BEGIN_DECLS
 259 AUTH    *authdes_create(char *, u_int, struct sockaddr *, des_block *);
 260 AUTH    *authdes_seccreate(const char *, const u_int, const char *,
 261                            const des_block *);
 262 __END_DECLS
 263
 264 __BEGIN_DECLS
 265 bool_t  xdr_opaque_auth(XDR *, struct opaque_auth *);
 266 __END_DECLS
 267
 268 #define authsys_create(c,i1,i2,i3,ip) authunix_create((c),(i1),(i2),(i3),(ip))
 269 #define authsys_create_default() authunix_create_default()
 270
 271 /*
 272  * Netname manipulation routines.
 273  */
 274 __BEGIN_DECLS
 275 int     getnetname(char *);
 276 int     host2netname(char *, const char *, const char *);
 277 int     user2netname(char *, const uid_t, const char *);
 278 int     netname2user(char *, uid_t *, gid_t *, int *, gid_t *);
 279 int     netname2host(char *, char *, const int);
 280 void    passwd2des(char *, char *);
 281 __END_DECLS
 282
 283 /*
 284  *
 285  * These routines interface to the keyserv daemon
 286  *
 287  */
 288 __BEGIN_DECLS
 289 int     key_decryptsession(const char *, des_block *);
 290 int     key_encryptsession(const char *, des_block *);
 291 int     key_gendes(des_block *);
 292 int     key_setsecret(const char *);
 293 int     key_secretkey_is_set(void);
 294 __END_DECLS
 295
 296 /*
 297  * Publickey routines.
 298  */
 299 __BEGIN_DECLS
 300 int     getpublickey(const char *, char *);
 301 int     getpublicandprivatekey(const char *, char *);
 302 int     getsecretkey(char *, char *, char *);
 303 __END_DECLS
 304
 305 #ifdef KERBEROS
 306 /*
 307  * Kerberos style authentication
 308  * AUTH *authkerb_seccreate(service, srv_inst, realm, window, timehost, status)
 309  *      const char *service;                    - service name
 310  *      const char *srv_inst;                   - server instance
 311  *      const char *realm;                      - server realm
 312  *      const u_int window;                     - time to live
 313  *      const char *timehost;                   - optional hostname to sync with
 314  *      int *status;                            - kerberos status returned
 315  */
 316 __BEGIN_DECLS
 317 AUTH    *authkerb_seccreate(const char *, const char *, const char *,
 318                             const u_int, const char *, int *);
 319 __END_DECLS
 320
 321 /*
 322  * Map a kerberos credential into a unix cred.
 323  *
 324  *      authkerb_getucred(rqst, uid, gid, grouplen, groups)
 325  *      const struct svc_req *rqst;             - request pointer
 326  *      uid_t *uid;
 327  *      gid_t *gid;
 328  *      short *grouplen;
 329  *      int *groups;
 330  *
 331  */
 332 __BEGIN_DECLS
 333 int     authkerb_getucred(/* struct svc_req *, uid_t *, gid_t *,
 334                           short *, int * */);
 335 __END_DECLS
 336 #endif /* KERBEROS */
 337
 338 __BEGIN_DECLS
 339 struct svc_req;
 340 struct rpc_msg;
 341 enum auth_stat _svcauth_null (struct svc_req *, struct rpc_msg *);
 342 enum auth_stat _svcauth_short (struct svc_req *, struct rpc_msg *);
 343 enum auth_stat _svcauth_unix (struct svc_req *, struct rpc_msg *);
 344 __END_DECLS
 345
 346 #define AUTH_NONE       0               /* no authentication */
 347 #define AUTH_NULL       0               /* backward compatibility */
 348 #define AUTH_SYS        1               /* unix style (uid, gids) */
 349 #define AUTH_UNIX       AUTH_SYS
 350 #define AUTH_SHORT      2               /* short hand unix style */
 351 #define AUTH_DH         3               /* for Diffie-Hellman mechanism */
 352 #define AUTH_DES        AUTH_DH         /* for backward compatibility */
 353 #define AUTH_KERB       4               /* kerberos style */
 354
 355 #endif /* !_RPC_AUTH_H */