auth_unix.c File Reference

#include <wintirpc.h>
#include <reentrant.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
#include <rpc/auth.h>
#include <rpc/auth_unix.h>

Include dependency graph for auth_unix.c:

Go to the source code of this file.

Classes
struct	audata

Macros
#define	AUTH_PRIVATE(auth)   ((struct audata *)auth->ah_private)

Functions
static void	authunix_nextverf (AUTH *)
static bool_t	authunix_marshal (AUTH *, XDR *, u_int *seq)
static bool_t	authunix_validate (AUTH *, struct opaque_auth *, u_int)
static bool_t	authunix_refresh (AUTH *, void *)
static void	authunix_destroy (AUTH *)
static void	marshal_new_auth (AUTH *)
static struct auth_ops *	authunix_ops (void)
AUTH *	authunix_create (char *machname, uid_t uid, gid_t gid, int len, gid_t *aup_gids)
AUTH *	authunix_create_default ()
static bool_t	authunix_wrap (AUTH *auth, XDR *xdrs, xdrproc_t func, caddr_t args, u_int seq)

Macro Definition Documentation

AUTH_PRIVATE

#define AUTH_PRIVATE

(

auth

)

((struct audata *)auth->ah_private)

Definition at line 100 of file auth_unix.c.

Function Documentation

authunix_create()

AUTH* authunix_create	(	char *	machname,
		uid_t	uid,
		gid_t	gid,
		int	len,
		gid_t *	aup_gids
	)

Definition at line 107 of file auth_unix.c.

{
    struct authunix_parms aup;
    char mymem[MAX_AUTH_BYTES];
    struct timeval now;
    XDR xdrs;
    AUTH *auth;
    struct audata *au;

    /*
     * Allocate and set up auth handle
     */
    au = NULL;
    auth = mem_alloc(sizeof(*auth));
#ifndef _KERNEL
    if (auth == NULL) {
        // XXX warnx("authunix_create: out of memory");
        goto cleanup_authunix_create;
    }
#endif
    au = mem_alloc(sizeof(*au));
#ifndef _KERNEL
    if (au == NULL) {
        // XXX warnx("authunix_create: out of memory");
        goto cleanup_authunix_create;
    }
#endif
    auth->ah_ops = authunix_ops();
    auth->ah_private = (caddr_t)au;
    auth->ah_verf = au->au_shcred = _null_auth;
    au->au_shfaults = 0;
    au->au_origcred.oa_base = NULL;

    /*
     * fill in param struct from the given params
     */
    (void)gettimeofday(&now, NULL);
    aup.aup_time = now.tv_sec;
    aup.aup_machname = machname;
    aup.aup_uid = uid;
    aup.aup_gid = gid;
    aup.aup_len = (u_int)len;
    aup.aup_gids = aup_gids;

    /*
     * Serialize the parameters into origcred
     */
    xdrmem_create(&xdrs, mymem, MAX_AUTH_BYTES, XDR_ENCODE);
    if (! xdr_authunix_parms(&xdrs, &aup)) 
        abort();
    au->au_origcred.oa_length = len = XDR_GETPOS(&xdrs);
    au->au_origcred.oa_flavor = AUTH_UNIX;
#ifdef _KERNEL
    au->au_origcred.oa_base = mem_alloc((u_int) len);
#else
    if ((au->au_origcred.oa_base = mem_alloc((u_int) len)) == NULL) {
        // XXX warnx("authunix_create: out of memory");
        goto cleanup_authunix_create;
    }
#endif
    memmove(au->au_origcred.oa_base, mymem, (size_t)len);

    /*
     * set auth handle to reflect new cred.
     */
    auth->ah_cred = au->au_origcred;
    marshal_new_auth(auth);
    return (auth);
#ifndef _KERNEL
 cleanup_authunix_create:
    if (auth)
        mem_free(auth, sizeof(*auth));
    if (au) {
        if (au->au_origcred.oa_base)
            mem_free(au->au_origcred.oa_base, (u_int)len);
        mem_free(au, sizeof(*au));
    }
    return (NULL);
#endif
}

Referenced by authunix_create_default().

authunix_create_default()

AUTH* authunix_create_default

(

void

)

Definition at line 198 of file auth_unix.c.

{
    int len;
    char machname[MAXHOSTNAMELEN + 1];
    uid_t uid;
    gid_t gid;
    gid_t gids[NGRPS];

    if (gethostname(machname, sizeof machname) == -1)
        abort();
    machname[sizeof(machname) - 1] = 0;
#if 0
    uid = geteuid();
    gid = getegid();
    if ((len = getgroups(NGRPS, gids)) < 0)
        abort();
#else
    // XXX Need to figure out what to do here!
    uid = 666;
    gid = 777;
    gids[0] = 0;
    len = 0;
#endif
    /* XXX: interface problem; those should all have been unsigned */
    return (authunix_create(machname, uid, gid, len, gids));
}

Referenced by rpc_broadcast_exp().

authunix_destroy()

static void authunix_destroy ( AUTH *  auth )

static

Definition at line 332 of file auth_unix.c.

{
    struct audata *au;

    assert(auth != NULL);

    au = AUTH_PRIVATE(auth);
    mem_free(au->au_origcred.oa_base, au->au_origcred.oa_length);

    if (au->au_shcred.oa_base != NULL)
        mem_free(au->au_shcred.oa_base, au->au_shcred.oa_length);

    mem_free(auth->ah_private, sizeof(struct audata));

    if (auth->ah_verf.oa_base != NULL)
        mem_free(auth->ah_verf.oa_base, auth->ah_verf.oa_length);

    mem_free(auth, sizeof(*auth));
}

Referenced by authunix_ops().

authunix_marshal()

static bool_t authunix_marshal ( AUTH *  auth, XDR *  xdrs, u_int *  seq  )

static

Definition at line 238 of file auth_unix.c.

{
    struct audata *au;

    assert(auth != NULL);
    assert(xdrs != NULL);

    au = AUTH_PRIVATE(auth);
    return (XDR_PUTBYTES(xdrs, au->au_marshed, au->au_mpos));
}

Referenced by authunix_ops().

authunix_nextverf()

static void authunix_nextverf ( AUTH *  auth )

static

Definition at line 231 of file auth_unix.c.

{
    /* no action necessary */
}

Referenced by authunix_ops().

authunix_ops()

static struct auth_ops * authunix_ops ( void  )

static

Definition at line 396 of file auth_unix.c.

{
    static struct auth_ops ops;
    extern mutex_t ops_lock;

    /* VARIABLES PROTECTED BY ops_lock: ops */

    mutex_lock(&ops_lock);
    if (ops.ah_nextverf == NULL) {
        ops.ah_nextverf = authunix_nextverf;
        ops.ah_marshal = authunix_marshal;
        ops.ah_validate = authunix_validate;
        ops.ah_refresh = authunix_refresh;
        ops.ah_destroy = authunix_destroy;
        ops.ah_wrap = authunix_wrap;
#ifndef __REACTOS__
        ops.ah_unwrap = authunix_wrap;
#else
        ops.ah_unwrap = authunix_unwrap;
#endif
    }
    mutex_unlock(&ops_lock);
    return (&ops);
}

Referenced by authunix_create().

authunix_refresh()

static bool_t authunix_refresh ( AUTH *  auth, void *  dummy  )

static

Definition at line 288 of file auth_unix.c.

{
    struct audata *au = AUTH_PRIVATE(auth);
    struct authunix_parms aup;
    struct timeval now;
    XDR xdrs;
    int stat;

    assert(auth != NULL);

    if (auth->ah_cred.oa_base == au->au_origcred.oa_base) {
        /* there is no hope.  Punt */
        return (FALSE);
    }
    au->au_shfaults ++;

    /* first deserialize the creds back into a struct authunix_parms */
    aup.aup_machname = NULL;
    aup.aup_gids = NULL;
    xdrmem_create(&xdrs, au->au_origcred.oa_base,
        au->au_origcred.oa_length, XDR_DECODE);
    stat = xdr_authunix_parms(&xdrs, &aup);
    if (! stat)
        goto done;

    /* update the time and serialize in place */
    (void)gettimeofday(&now, NULL);
    aup.aup_time = now.tv_sec;
    xdrs.x_op = XDR_ENCODE;
    XDR_SETPOS(&xdrs, 0);
    stat = xdr_authunix_parms(&xdrs, &aup);
    if (! stat)
        goto done;
    auth->ah_cred = au->au_origcred;
    marshal_new_auth(auth);
done:
    /* free the struct authunix_parms created by deserializing */
    xdrs.x_op = XDR_FREE;
    (void)xdr_authunix_parms(&xdrs, &aup);
    XDR_DESTROY(&xdrs);
    return (stat);
}

Referenced by authunix_ops().

authunix_validate()

static bool_t authunix_validate ( AUTH *  auth, struct opaque_auth *  verf, u_int  seq  )

static

Definition at line 253 of file auth_unix.c.

{
    struct audata *au;
    XDR xdrs;

    assert(auth != NULL);
    assert(verf != NULL);

    if (verf->oa_flavor == AUTH_SHORT) {
        au = AUTH_PRIVATE(auth);
        xdrmem_create(&xdrs, verf->oa_base, verf->oa_length,
            XDR_DECODE);

        if (au->au_shcred.oa_base != NULL) {
            mem_free(au->au_shcred.oa_base,
                au->au_shcred.oa_length);
            au->au_shcred.oa_base = NULL;
        }
        if (xdr_opaque_auth(&xdrs, &au->au_shcred)) {
            auth->ah_cred = au->au_shcred;
        } else {
            xdrs.x_op = XDR_FREE;
            (void)xdr_opaque_auth(&xdrs, &au->au_shcred);
            au->au_shcred.oa_base = NULL;
            auth->ah_cred = au->au_origcred;
        }
        marshal_new_auth(auth);
    }
    return (TRUE);
}

Referenced by authunix_ops().

authunix_wrap()

static bool_t authunix_wrap ( AUTH *  auth, XDR *  xdrs, xdrproc_t  func, caddr_t  args, u_int  seq  )

static

Definition at line 380 of file auth_unix.c.

{
    return ((*func)(xdrs, args));
}

Referenced by authunix_ops().

marshal_new_auth()

static void marshal_new_auth ( AUTH *  auth )

static

Definition at line 358 of file auth_unix.c.

{
    XDR xdr_stream;
    XDR *xdrs = &xdr_stream;
    struct audata *au;

    assert(auth != NULL);

    au = AUTH_PRIVATE(auth);
    xdrmem_create(xdrs, au->au_marshed, MAX_AUTH_BYTES, XDR_ENCODE);
    if ((! xdr_opaque_auth(xdrs, &(auth->ah_cred))) ||
        (! xdr_opaque_auth(xdrs, &(auth->ah_verf))))
        assert(0); // XXX
        // XXX warnx("auth_none.c - Fatal marshalling problem");
    else
        au->au_mpos = XDR_GETPOS(xdrs);
    XDR_DESTROY(xdrs);
}

Referenced by authunix_create(), authunix_refresh(), and authunix_validate().