The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/rpc/auth.h

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    1 /*      $NetBSD: auth.h,v 1.15 2000/06/02 22:57:55 fvdl Exp $   */
    2 
    3 /*
    4  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
    5  * unrestricted use provided that this legend is included on all tape
    6  * media and as a part of the software program in whole or part.  Users
    7  * may copy or modify Sun RPC without charge, but are not authorized
    8  * to license or distribute it to anyone else except as part of a product or
    9  * program developed by the user.
   10  *
   11  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
   12  * WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   13  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
   14  *
   15  * Sun RPC is provided with no support and without any obligation on the
   16  * part of Sun Microsystems, Inc. to assist in its use, correction,
   17  * modification or enhancement.
   18  *
   19  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
   20  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
   21  * OR ANY PART THEREOF.
   22  *
   23  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
   24  * or profits or other special, indirect and consequential damages, even if
   25  * Sun has been advised of the possibility of such damages.
   26  *
   27  * Sun Microsystems, Inc.
   28  * 2550 Garcia Avenue
   29  * Mountain View, California  94043
   30  *
   31  *      from: @(#)auth.h 1.17 88/02/08 SMI
   32  *      from: @(#)auth.h        2.3 88/08/07 4.0 RPCSRC
   33  *      from: @(#)auth.h        1.43    98/02/02 SMI
   34  * $FreeBSD: releng/8.3/sys/rpc/auth.h 199583 2009-11-20 15:27:52Z jhb $
   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          * RPCSEC_GSS errors
  149          */
  150         RPCSEC_GSS_CREDPROBLEM = 13,
  151         RPCSEC_GSS_CTXPROBLEM = 14,
  152         RPCSEC_GSS_NODISPATCH = 0x8000000
  153 };
  154 
  155 union des_block {
  156         struct {
  157                 uint32_t high;
  158                 uint32_t low;
  159         } key;
  160         char c[8];
  161 };
  162 typedef union des_block des_block;
  163 __BEGIN_DECLS
  164 extern bool_t xdr_des_block(XDR *, des_block *);
  165 __END_DECLS
  166 
  167 /*
  168  * Authentication info.  Opaque to client.
  169  */
  170 struct opaque_auth {
  171         enum_t  oa_flavor;              /* flavor of auth */
  172         caddr_t oa_base;                /* address of more auth stuff */
  173         u_int   oa_length;              /* not to exceed MAX_AUTH_BYTES */
  174 };
  175 
  176 
  177 /*
  178  * Auth handle, interface to client side authenticators.
  179  */
  180 struct rpc_err;
  181 typedef struct __auth {
  182         struct  opaque_auth     ah_cred;
  183         struct  opaque_auth     ah_verf;
  184         union   des_block       ah_key;
  185         struct auth_ops {
  186                 void    (*ah_nextverf) (struct __auth *);
  187                 /* nextverf & serialize */
  188                 int     (*ah_marshal) (struct __auth *, uint32_t, XDR *,
  189                     struct mbuf *);
  190                 /* validate verifier */
  191                 int     (*ah_validate) (struct __auth *, uint32_t,
  192                     struct opaque_auth *, struct mbuf **);
  193                 /* refresh credentials */
  194                 int     (*ah_refresh) (struct __auth *, void *);
  195                 /* destroy this structure */
  196                 void    (*ah_destroy) (struct __auth *);
  197         } *ah_ops;
  198         void *ah_private;
  199 } AUTH;
  200 
  201 
  202 /*
  203  * Authentication ops.
  204  * The ops and the auth handle provide the interface to the authenticators.
  205  *
  206  * AUTH *auth;
  207  * XDR  *xdrs;
  208  * struct opaque_auth verf;
  209  */
  210 #define AUTH_NEXTVERF(auth)             \
  211                 ((*((auth)->ah_ops->ah_nextverf))(auth))
  212 
  213 #define AUTH_MARSHALL(auth, xid, xdrs, args)    \
  214                 ((*((auth)->ah_ops->ah_marshal))(auth, xid, xdrs, args))
  215 
  216 #define AUTH_VALIDATE(auth, xid, verfp, resultsp) \
  217                 ((*((auth)->ah_ops->ah_validate))((auth), xid, verfp, resultsp))
  218 
  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 
  225 __BEGIN_DECLS
  226 extern struct opaque_auth _null_auth;
  227 __END_DECLS
  228 
  229 /*
  230  * These are the various implementations of client side authenticators.
  231  */
  232 
  233 /*
  234  * System style authentication
  235  * AUTH *authunix_create(machname, uid, gid, len, aup_gids)
  236  *      char *machname;
  237  *      int uid;
  238  *      int gid;
  239  *      int len;
  240  *      int *aup_gids;
  241  */
  242 __BEGIN_DECLS
  243 #ifdef _KERNEL
  244 struct ucred;
  245 extern AUTH *authunix_create(struct ucred *);
  246 #else
  247 extern AUTH *authunix_create(char *, int, int, int,
  248     int *);
  249 extern AUTH *authunix_create_default(void);     /* takes no parameters */
  250 #endif
  251 extern AUTH *authnone_create(void);             /* takes no parameters */
  252 __END_DECLS
  253 /*
  254  * DES style authentication
  255  * AUTH *authsecdes_create(servername, window, timehost, ckey)
  256  *      char *servername;               - network name of server
  257  *      u_int window;                   - time to live
  258  *      const char *timehost;                   - optional hostname to sync with
  259  *      des_block *ckey;                - optional conversation key to use
  260  */
  261 __BEGIN_DECLS
  262 extern AUTH *authdes_create (char *, u_int, struct sockaddr *, des_block *);
  263 extern AUTH *authdes_seccreate (const char *, const u_int, const  char *,
  264     const  des_block *);
  265 __END_DECLS
  266 
  267 __BEGIN_DECLS
  268 extern bool_t xdr_opaque_auth           (XDR *, struct opaque_auth *);
  269 __END_DECLS
  270 
  271 #define authsys_create(c,i1,i2,i3,ip) authunix_create((c),(i1),(i2),(i3),(ip))
  272 #define authsys_create_default() authunix_create_default()
  273 
  274 /*
  275  * Netname manipulation routines.
  276  */
  277 __BEGIN_DECLS
  278 extern int getnetname(char *);
  279 extern int host2netname(char *, const char *, const char *);
  280 extern int user2netname(char *, const uid_t, const char *);
  281 extern int netname2user(char *, uid_t *, gid_t *, int *, gid_t *);
  282 extern int netname2host(char *, char *, const int);
  283 extern void passwd2des ( char *, char * );
  284 __END_DECLS
  285 
  286 /*
  287  *
  288  * These routines interface to the keyserv daemon
  289  *
  290  */
  291 __BEGIN_DECLS
  292 extern int key_decryptsession(const char *, des_block *);
  293 extern int key_encryptsession(const char *, des_block *);
  294 extern int key_gendes(des_block *);
  295 extern int key_setsecret(const char *);
  296 extern int key_secretkey_is_set(void);
  297 __END_DECLS
  298 
  299 /*
  300  * Publickey routines.
  301  */
  302 __BEGIN_DECLS
  303 extern int getpublickey (const char *, char *);
  304 extern int getpublicandprivatekey (const char *, char *);
  305 extern int getsecretkey (char *, char *, char *);
  306 __END_DECLS
  307 
  308 #ifdef KERBEROS
  309 /*
  310  * Kerberos style authentication
  311  * AUTH *authkerb_seccreate(service, srv_inst, realm, window, timehost, status)
  312  *      const char *service;                    - service name
  313  *      const char *srv_inst;                   - server instance
  314  *      const char *realm;                      - server realm
  315  *      const u_int window;                     - time to live
  316  *      const char *timehost;                   - optional hostname to sync with
  317  *      int *status;                            - kerberos status returned
  318  */
  319 __BEGIN_DECLS
  320 extern AUTH     *authkerb_seccreate(const char *, const char *, const  char *,
  321                     const u_int, const char *, int *);
  322 __END_DECLS
  323 
  324 /*
  325  * Map a kerberos credential into a unix cred.
  326  *
  327  *      authkerb_getucred(rqst, uid, gid, grouplen, groups)
  328  *      const struct svc_req *rqst;             - request pointer
  329  *      uid_t *uid;
  330  *      gid_t *gid;
  331  *      short *grouplen;
  332  *      int *groups;
  333  *
  334  */
  335 __BEGIN_DECLS
  336 extern int      authkerb_getucred(/* struct svc_req *, uid_t *, gid_t *,
  337                     short *, int * */);
  338 __END_DECLS
  339 #endif /* KERBEROS */
  340 
  341 __BEGIN_DECLS
  342 struct svc_req;
  343 struct rpc_msg;
  344 enum auth_stat _svcauth_null (struct svc_req *, struct rpc_msg *);
  345 enum auth_stat _svcauth_short (struct svc_req *, struct rpc_msg *);
  346 enum auth_stat _svcauth_unix (struct svc_req *, struct rpc_msg *);
  347 __END_DECLS
  348 
  349 #define AUTH_NONE       0               /* no authentication */
  350 #define AUTH_NULL       0               /* backward compatibility */
  351 #define AUTH_SYS        1               /* unix style (uid, gids) */
  352 #define AUTH_UNIX       AUTH_SYS
  353 #define AUTH_SHORT      2               /* short hand unix style */
  354 #define AUTH_DH         3               /* for Diffie-Hellman mechanism */
  355 #define AUTH_DES        AUTH_DH         /* for backward compatibility */
  356 #define AUTH_KERB       4               /* kerberos style */
  357 #define RPCSEC_GSS      6               /* RPCSEC_GSS */
  358 
  359 /*
  360  * Pseudo auth flavors for RPCSEC_GSS.
  361  */
  362 #define RPCSEC_GSS_KRB5         390003
  363 #define RPCSEC_GSS_KRB5I        390004
  364 #define RPCSEC_GSS_KRB5P        390005
  365 
  366 #endif /* !_RPC_AUTH_H */

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