krb5/kadm5/kadm_rpc_xdr.c

/* -*- mode: c; c-file-style: "bsd"; indent-tabs-mode: t -*- */

/*
 * Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved.
 */

/*
 * Copyright 1993 OpenVision Technologies, Inc., All Rights Reserved
 */

/*
 * WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
 *
 *  Openvision retains the copyright to derivative works of
 *  this source code.  Do *NOT* create a derivative of this
 *  source code before consulting with your legal department.
 *  Do *NOT* integrate *ANY* of this source code into another
 *  product before consulting with your legal department.
 *
 *  For further information, read the top-level Openvision
 *  copyright which is contained in the top-level MIT Kerberos
 *  copyright.
 *
 * WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
 *
 */

#include <rpc/rpc.h>
#include <krb5.h>
#include <errno.h>
#include <kadm5/admin.h>
#include <kadm5/kadm_rpc.h>
#include <kadm5/admin_xdr.h>
#include <stdlib.h>
#include <string.h>

static bool_t
_xdr_kadm5_principal_ent_rec(XDR *xdrs, kadm5_principal_ent_rec *objp,
                 int v);
static bool_t
_xdr_kadm5_policy_ent_rec(XDR *xdrs, kadm5_policy_ent_rec *objp, int vers);

/*
 * Function: xdr_ui_4
 *
 * Purpose: XDR function which serves as a wrapper for xdr_u_int,
 * to prevent compiler warnings about type clashes between u_int32
 * and krb5_ui_4.
 */
bool_t xdr_ui_4(XDR *xdrs, krb5_ui_4 *objp)
{
  /* Assumes that krb5_ui_4 and u_int32 are both four bytes long.
     This should not be a harmful assumption. */
  return xdr_u_int(xdrs, (uint32_t *) objp);
}


/*
 * Function: xdr_nullstring
 *
 * Purpose: XDR function for "strings" that are either NULL-terminated
 * or NULL.
 */
bool_t xdr_nullstring(XDR *xdrs, char **objp)
{
     u_int size;

     if (xdrs->x_op == XDR_ENCODE) {
      if (*objp == NULL)
           size = 0;
      else
           size = strlen(*objp) + 1;
     }
     if (! xdr_u_int(xdrs, &size)) {
      return FALSE;
    }
     switch (xdrs->x_op) {
     case XDR_DECODE:
      if (size == 0) {
           *objp = NULL;
           return TRUE;
      } else if (*objp == NULL) {
           *objp = (char *) mem_alloc(size);
           if (*objp == NULL) {
            errno = ENOMEM;
            return FALSE;
           }
      }
      return (xdr_opaque(xdrs, *objp, size));

     case XDR_ENCODE:
      if (size != 0)
           return (xdr_opaque(xdrs, *objp, size));
      return TRUE;

     case XDR_FREE:
      if (*objp != NULL)
           mem_free(*objp, size);
      *objp = NULL;
      return TRUE;
     }

     return FALSE;
}

/*
 * Function: xdr_nulltype
 *
 * Purpose: XDR function for arbitrary pointer types that are either
 * NULL or contain data.
 */
bool_t xdr_nulltype(XDR *xdrs, void **objp, xdrproc_t proc)
{
     bool_t null;

     switch (xdrs->x_op) {
     case XDR_DECODE:
      if (!xdr_bool(xdrs, &null))
          return FALSE;
      if (null) {
           *objp = NULL;
           return TRUE;
      }
      return (*proc)(xdrs, objp);

     case XDR_ENCODE:
      if (*objp == NULL)
           null = TRUE;
      else
           null = FALSE;
      if (!xdr_bool(xdrs, &null))
           return FALSE;
      if (null == FALSE)
           return (*proc)(xdrs, objp);
      return TRUE;

     case XDR_FREE:
      if (*objp)
           return (*proc)(xdrs, objp);
      return TRUE;
     }

     return FALSE;
}

bool_t
xdr_krb5_timestamp(XDR *xdrs, krb5_timestamp *objp)
{
  /* This assumes that int32 and krb5_timestamp are the same size.
     This shouldn't be a problem, since we've got a unit test which
     checks for this. */
    if (!xdr_int(xdrs, (int32_t *) objp)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_krb5_kvno(XDR *xdrs, krb5_kvno *objp)
{
    unsigned char tmp;

    tmp = '\0'; /* for purify, else xdr_u_char performs a umr */

    if (xdrs->x_op == XDR_ENCODE)
        tmp = (unsigned char) *objp;

    if (!xdr_u_char(xdrs, &tmp))
        return (FALSE);

    if (xdrs->x_op == XDR_DECODE)
        *objp = (krb5_kvno) tmp;

    return (TRUE);
}

bool_t
xdr_krb5_deltat(XDR *xdrs, krb5_deltat *objp)
{
  /* This assumes that int32 and krb5_deltat are the same size.
     This shouldn't be a problem, since we've got a unit test which
     checks for this. */
    if (!xdr_int(xdrs, (int32_t *) objp)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_krb5_flags(XDR *xdrs, krb5_flags *objp)
{
  /* This assumes that int32 and krb5_flags are the same size.
     This shouldn't be a problem, since we've got a unit test which
     checks for this. */
    if (!xdr_int(xdrs, (int32_t *) objp)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_krb5_ui_4(XDR *xdrs, krb5_ui_4 *objp)
{
    if (!xdr_u_int(xdrs, (uint32_t *) objp)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_krb5_int16(XDR *xdrs, krb5_int16 *objp)
{
    int tmp;

    tmp = (int) *objp;

    if (!xdr_int(xdrs, &tmp))
    return(FALSE);

    *objp = (krb5_int16) tmp;

    return(TRUE);
}

/*
 * Function: xdr_krb5_ui_2
 *
 * Purpose: XDR function which serves as a wrapper for xdr_u_int,
 * to prevent compiler warnings about type clashes between u_int
 * and krb5_ui_2.
 */
bool_t
xdr_krb5_ui_2(XDR *xdrs, krb5_ui_2 *objp)
{
    unsigned int tmp;

    tmp = (unsigned int) *objp;

    if (!xdr_u_int(xdrs, &tmp))
    return(FALSE);

    *objp = (krb5_ui_2) tmp;

    return(TRUE);
}


static bool_t xdr_krb5_boolean(XDR *xdrs, krb5_boolean *kbool)
{
    bool_t val;

    switch (xdrs->x_op) {
    case XDR_DECODE:
         if (!xdr_bool(xdrs, &val))
             return FALSE;

         *kbool = (val == FALSE) ? FALSE : TRUE;
         return TRUE;

    case XDR_ENCODE:
         val = *kbool ? TRUE : FALSE;
         return xdr_bool(xdrs, &val);

    case XDR_FREE:
         return TRUE;
    }

    return FALSE;
}

bool_t xdr_krb5_key_data_nocontents(XDR *xdrs, krb5_key_data *objp)
{
     /*
      * Note that this function intentionally DOES NOT tranfer key
      * length or contents!  xdr_krb5_key_data in adb_xdr.c does, but
      * that is only for use within the server-side library.
      */
     unsigned int tmp;

     if (xdrs->x_op == XDR_DECODE)
      memset(objp, 0, sizeof(krb5_key_data));

     if (!xdr_krb5_int16(xdrs, &objp->key_data_ver)) {
      return (FALSE);
     }
     if (!xdr_krb5_int16(xdrs, &objp->key_data_kvno)) {
      return (FALSE);
     }
     if (!xdr_krb5_int16(xdrs, &objp->key_data_type[0])) {
      return (FALSE);
     }
     if (objp->key_data_ver > 1) {
      if (!xdr_krb5_int16(xdrs, &objp->key_data_type[1])) {
           return (FALSE);
      }
     }
     /*
      * kadm5_get_principal on the server side allocates and returns
      * key contents when asked.  Even though this function refuses to
      * transmit that data, it still has to *free* the data at the
      * appropriate time to avoid a memory leak.
      */
     if (xdrs->x_op == XDR_FREE) {
      tmp = (unsigned int) objp->key_data_length[0];
      if (!xdr_bytes(xdrs, (char **) &objp->key_data_contents[0],
             &tmp, ~0))
           return FALSE;

      tmp = (unsigned int) objp->key_data_length[1];
      if (!xdr_bytes(xdrs, (char **) &objp->key_data_contents[1],
             &tmp, ~0))
           return FALSE;
     }

     return (TRUE);
}


bool_t
xdr_krb5_key_salt_tuple(XDR *xdrs, krb5_key_salt_tuple *objp)
{
    if (!xdr_krb5_enctype(xdrs, &objp->ks_enctype))
    return FALSE;
    if (!xdr_krb5_salttype(xdrs, &objp->ks_salttype))
    return FALSE;
    return TRUE;
}

bool_t xdr_krb5_tl_data(XDR *xdrs, krb5_tl_data **tl_data_head)
{
     krb5_tl_data *tl, *tl2;
     bool_t more;
     unsigned int len;

     switch (xdrs->x_op) {
     case XDR_FREE:
      tl = tl2 = *tl_data_head;
      while (tl) {
           tl2 = tl->tl_data_next;
           free(tl->tl_data_contents);
           free(tl);
           tl = tl2;
      }
      break;

     case XDR_ENCODE:
      tl = *tl_data_head;
      while (1) {
           more = (tl != NULL);
           if (!xdr_bool(xdrs, &more))
            return FALSE;
           if (tl == NULL)
            break;
           if (!xdr_krb5_int16(xdrs, &tl->tl_data_type))
            return FALSE;
           len = tl->tl_data_length;
           if (!xdr_bytes(xdrs, (char **) &tl->tl_data_contents, &len, ~0))
            return FALSE;
           tl = tl->tl_data_next;
      }
      break;

     case XDR_DECODE:
      tl = NULL;
      while (1) {
           if (!xdr_bool(xdrs, &more))
            return FALSE;
           if (more == FALSE)
            break;
           tl2 = (krb5_tl_data *) malloc(sizeof(krb5_tl_data));
           if (tl2 == NULL)
            return FALSE;
           memset(tl2, 0, sizeof(krb5_tl_data));
           if (!xdr_krb5_int16(xdrs, &tl2->tl_data_type))
            return FALSE;
           if (!xdr_bytes(xdrs, (char **)&tl2->tl_data_contents, &len, ~0))
            return FALSE;
           tl2->tl_data_length = len;

           tl2->tl_data_next = tl;
           tl = tl2;
      }

      *tl_data_head = tl;
      break;
     }

     return TRUE;
}

bool_t
xdr_kadm5_ret_t(XDR *xdrs, kadm5_ret_t *objp)
{
    uint32_t tmp;

    if (xdrs->x_op == XDR_ENCODE)
        tmp = (uint32_t) *objp;

    if (!xdr_u_int(xdrs, &tmp))
        return (FALSE);

    if (xdrs->x_op == XDR_DECODE)
        *objp = (kadm5_ret_t) tmp;

    return (TRUE);
}

bool_t xdr_kadm5_principal_ent_rec(XDR *xdrs,
                   kadm5_principal_ent_rec *objp)
{
     return _xdr_kadm5_principal_ent_rec(xdrs, objp, KADM5_API_VERSION_3);
}

static bool_t
_xdr_kadm5_principal_ent_rec(XDR *xdrs, kadm5_principal_ent_rec *objp,
                 int v)
{
    unsigned int n;

    if (!xdr_krb5_principal(xdrs, &objp->principal)) {
        return (FALSE);
    }
    if (!xdr_krb5_timestamp(xdrs, &objp->princ_expire_time)) {
        return (FALSE);
    }
    if (!xdr_krb5_timestamp(xdrs, &objp->last_pwd_change)) {
        return (FALSE);
    }
    if (!xdr_krb5_timestamp(xdrs, &objp->pw_expiration)) {
        return (FALSE);
    }
    if (!xdr_krb5_deltat(xdrs, &objp->max_life)) {
        return (FALSE);
    }
    if (!xdr_nulltype(xdrs, (void **) &objp->mod_name,
              xdr_krb5_principal)) {
        return (FALSE);
    }
    if (!xdr_krb5_timestamp(xdrs, &objp->mod_date)) {
        return (FALSE);
    }
    if (!xdr_krb5_flags(xdrs, &objp->attributes)) {
        return (FALSE);
    }
    if (!xdr_krb5_kvno(xdrs, &objp->kvno)) {
        return (FALSE);
    }
    if (!xdr_krb5_kvno(xdrs, &objp->mkvno)) {
        return (FALSE);
    }
    if (!xdr_nullstring(xdrs, &objp->policy)) {
        return (FALSE);
    }
    if (!xdr_long(xdrs, &objp->aux_attributes)) {
        return (FALSE);
    }
    if (!xdr_krb5_deltat(xdrs, &objp->max_renewable_life)) {
        return (FALSE);
    }
    if (!xdr_krb5_timestamp(xdrs, &objp->last_success)) {
        return (FALSE);
    }
    if (!xdr_krb5_timestamp(xdrs, &objp->last_failed)) {
        return (FALSE);
    }
    if (!xdr_krb5_kvno(xdrs, &objp->fail_auth_count)) {
        return (FALSE);
    }
    if (!xdr_krb5_int16(xdrs, &objp->n_key_data)) {
        return (FALSE);
    }
    if (!xdr_krb5_int16(xdrs, &objp->n_tl_data)) {
        return (FALSE);
    }
    if (!xdr_nulltype(xdrs, (void **) &objp->tl_data,
              xdr_krb5_tl_data)) {
        return FALSE;
    }
    n = objp->n_key_data;
    if (!xdr_array(xdrs, (caddr_t *) &objp->key_data,
               &n, ~0, sizeof(krb5_key_data),
               xdr_krb5_key_data_nocontents)) {
        return (FALSE);
    }

    return (TRUE);
}

static bool_t
_xdr_kadm5_policy_ent_rec(XDR *xdrs, kadm5_policy_ent_rec *objp, int vers)
{
    if (!xdr_nullstring(xdrs, &objp->policy)) {
        return (FALSE);
    }
    /* these all used to be u_int32, but it's stupid for sized types
       to be exposed at the api, and they're the same as longs on the
       wire. */
    if (!xdr_long(xdrs, &objp->pw_min_life)) {
        return (FALSE);
    }
    if (!xdr_long(xdrs, &objp->pw_max_life)) {
        return (FALSE);
    }
    if (!xdr_long(xdrs, &objp->pw_min_length)) {
        return (FALSE);
    }
    if (!xdr_long(xdrs, &objp->pw_min_classes)) {
        return (FALSE);
    }
    if (!xdr_long(xdrs, &objp->pw_history_num)) {
        return (FALSE);
    }
    if (!xdr_long(xdrs, &objp->policy_refcnt)) {
        return (FALSE);
    }
    if (vers == KADM5_API_VERSION_3) {
        if (!xdr_krb5_kvno(xdrs, &objp->pw_max_fail))
            return (FALSE);
        if (!xdr_krb5_deltat(xdrs, &objp->pw_failcnt_interval))
            return (FALSE);
        if (!xdr_krb5_deltat(xdrs, &objp->pw_lockout_duration))
            return (FALSE);
    } else if (xdrs->x_op == XDR_DECODE) {
        objp->pw_max_fail = 0;
        objp->pw_failcnt_interval = 0;
        objp->pw_lockout_duration = 0;
    }
    return (TRUE);
}

bool_t
xdr_kadm5_policy_ent_rec(XDR *xdrs, kadm5_policy_ent_rec *objp)
{
    return _xdr_kadm5_policy_ent_rec(xdrs, objp, KADM5_API_VERSION_3);
}

bool_t
xdr_cprinc_arg(XDR *xdrs, cprinc_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!_xdr_kadm5_principal_ent_rec(xdrs, &objp->rec,
                      objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_long(xdrs, &objp->mask)) {
        return (FALSE);
    }
    if (!xdr_nullstring(xdrs, &objp->passwd)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_cprinc3_arg(XDR *xdrs, cprinc3_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!_xdr_kadm5_principal_ent_rec(xdrs, &objp->rec,
                      objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_long(xdrs, &objp->mask)) {
        return (FALSE);
    }
    if (!xdr_array(xdrs, (caddr_t *)&objp->ks_tuple,
               (unsigned int *)&objp->n_ks_tuple, ~0,
               sizeof(krb5_key_salt_tuple),
               xdr_krb5_key_salt_tuple)) {
        return (FALSE);
    }
    if (!xdr_nullstring(xdrs, &objp->passwd)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_generic_ret(XDR *xdrs, generic_ret *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_kadm5_ret_t(xdrs, &objp->code)) {
        return (FALSE);
    }

    return(TRUE);
}

bool_t
xdr_dprinc_arg(XDR *xdrs, dprinc_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_krb5_principal(xdrs, &objp->princ)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_mprinc_arg(XDR *xdrs, mprinc_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!_xdr_kadm5_principal_ent_rec(xdrs, &objp->rec,
                      objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_long(xdrs, &objp->mask)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_rprinc_arg(XDR *xdrs, rprinc_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_krb5_principal(xdrs, &objp->src)) {
        return (FALSE);
    }
    if (!xdr_krb5_principal(xdrs, &objp->dest)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_gprincs_arg(XDR *xdrs, gprincs_arg *objp)
{
     if (!xdr_ui_4(xdrs, &objp->api_version)) {
      return (FALSE);
     }
     if (!xdr_nullstring(xdrs, &objp->exp)) {
      return (FALSE);
     }
     return (TRUE);
}

bool_t
xdr_gprincs_ret(XDR *xdrs, gprincs_ret *objp)
{
     if (!xdr_ui_4(xdrs, &objp->api_version)) {
      return (FALSE);
     }
     if (!xdr_kadm5_ret_t(xdrs, &objp->code)) {
      return (FALSE);
     }
     if (objp->code == KADM5_OK) {
      if (!xdr_int(xdrs, &objp->count)) {
           return (FALSE);
      }
      if (!xdr_array(xdrs, (caddr_t *) &objp->princs,
             (unsigned int *) &objp->count, ~0,
             sizeof(char *), xdr_nullstring)) {
           return (FALSE);
      }
     }

     return (TRUE);
}

bool_t
xdr_chpass_arg(XDR *xdrs, chpass_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_krb5_principal(xdrs, &objp->princ)) {
        return (FALSE);
    }
    if (!xdr_nullstring(xdrs, &objp->pass)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_chpass3_arg(XDR *xdrs, chpass3_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_krb5_principal(xdrs, &objp->princ)) {
        return (FALSE);
    }
    if (!xdr_krb5_boolean(xdrs, &objp->keepold)) {
        return (FALSE);
    }
    if (!xdr_array(xdrs, (caddr_t *)&objp->ks_tuple,
               (unsigned int*)&objp->n_ks_tuple, ~0,
               sizeof(krb5_key_salt_tuple),
               xdr_krb5_key_salt_tuple)) {
        return (FALSE);
    }
    if (!xdr_nullstring(xdrs, &objp->pass)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_setv4key_arg(XDR *xdrs, setv4key_arg *objp)
{
    unsigned int n_keys = 1;

    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_krb5_principal(xdrs, &objp->princ)) {
        return (FALSE);
    }
    if (!xdr_array(xdrs, (caddr_t *) &objp->keyblock,
               &n_keys, ~0,
               sizeof(krb5_keyblock), xdr_krb5_keyblock)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_setkey_arg(XDR *xdrs, setkey_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_krb5_principal(xdrs, &objp->princ)) {
        return (FALSE);
    }
    if (!xdr_array(xdrs, (caddr_t *) &objp->keyblocks,
               (unsigned int *) &objp->n_keys, ~0,
               sizeof(krb5_keyblock), xdr_krb5_keyblock)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_setkey3_arg(XDR *xdrs, setkey3_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_krb5_principal(xdrs, &objp->princ)) {
        return (FALSE);
    }
    if (!xdr_krb5_boolean(xdrs, &objp->keepold)) {
        return (FALSE);
    }
    if (!xdr_array(xdrs, (caddr_t *) &objp->ks_tuple,
               (unsigned int *) &objp->n_ks_tuple, ~0,
               sizeof(krb5_key_salt_tuple), xdr_krb5_key_salt_tuple)) {
        return (FALSE);
    }
    if (!xdr_array(xdrs, (caddr_t *) &objp->keyblocks,
               (unsigned int *) &objp->n_keys, ~0,
               sizeof(krb5_keyblock), xdr_krb5_keyblock)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_chrand_arg(XDR *xdrs, chrand_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_krb5_principal(xdrs, &objp->princ)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_chrand3_arg(XDR *xdrs, chrand3_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_krb5_principal(xdrs, &objp->princ)) {
        return (FALSE);
    }
    if (!xdr_krb5_boolean(xdrs, &objp->keepold)) {
        return (FALSE);
    }
    if (!xdr_array(xdrs, (caddr_t *)&objp->ks_tuple,
               (unsigned int*)&objp->n_ks_tuple, ~0,
               sizeof(krb5_key_salt_tuple),
               xdr_krb5_key_salt_tuple)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_chrand_ret(XDR *xdrs, chrand_ret *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_kadm5_ret_t(xdrs, &objp->code)) {
        return (FALSE);
    }
    if (objp->code == KADM5_OK) {
                /* Solaris Kerberos */
        if (!xdr_array(xdrs, (char **)&objp->keys, (unsigned int *)&objp->n_keys, ~0,
                   sizeof(krb5_keyblock), xdr_krb5_keyblock))
            return FALSE;
    }

    return (TRUE);
}

bool_t
xdr_gprinc_arg(XDR *xdrs, gprinc_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_krb5_principal(xdrs, &objp->princ)) {
        return (FALSE);
    }
    if (!xdr_long(xdrs, &objp->mask)) {
         return FALSE;
    }

    return (TRUE);
}

bool_t
xdr_gprinc_ret(XDR *xdrs, gprinc_ret *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_kadm5_ret_t(xdrs, &objp->code)) {
        return (FALSE);
    }
    if(objp->code == KADM5_OK)  {
        if (!_xdr_kadm5_principal_ent_rec(xdrs, &objp->rec,
                          objp->api_version)) {
            return (FALSE);
        }
    }

    return (TRUE);
}

bool_t
xdr_cpol_arg(XDR *xdrs, cpol_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!_xdr_kadm5_policy_ent_rec(xdrs, &objp->rec,
                       objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_long(xdrs, &objp->mask)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_dpol_arg(XDR *xdrs, dpol_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_nullstring(xdrs, &objp->name)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_mpol_arg(XDR *xdrs, mpol_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!_xdr_kadm5_policy_ent_rec(xdrs, &objp->rec,
                       objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_long(xdrs, &objp->mask)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_gpol_arg(XDR *xdrs, gpol_arg *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_nullstring(xdrs, &objp->name)) {
        return (FALSE);
    }
    return (TRUE);
}

bool_t
xdr_gpol_ret(XDR *xdrs, gpol_ret *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
    if (!xdr_kadm5_ret_t(xdrs, &objp->code)) {
        return (FALSE);
    }
    if(objp->code == KADM5_OK) {
        if (!_xdr_kadm5_policy_ent_rec(xdrs, &objp->rec,
                       objp->api_version))
        return (FALSE);
    }

    return (TRUE);
}

bool_t
xdr_gpols_arg(XDR *xdrs, gpols_arg *objp)
{
     if (!xdr_ui_4(xdrs, &objp->api_version)) {
      return (FALSE);
     }
     if (!xdr_nullstring(xdrs, &objp->exp)) {
      return (FALSE);
     }
     return (TRUE);
}

bool_t
xdr_gpols_ret(XDR *xdrs, gpols_ret *objp)
{
     if (!xdr_ui_4(xdrs, &objp->api_version)) {
      return (FALSE);
     }
     if (!xdr_kadm5_ret_t(xdrs, &objp->code)) {
      return (FALSE);
     }
     if (objp->code == KADM5_OK) {
      if (!xdr_int(xdrs, &objp->count)) {
           return (FALSE);
      }
      if (!xdr_array(xdrs, (caddr_t *) &objp->pols,
             (unsigned int *) &objp->count, ~0,
             sizeof(char *), xdr_nullstring)) {
           return (FALSE);
      }
     }

     return (TRUE);
}

bool_t xdr_getprivs_ret(XDR *xdrs, getprivs_ret *objp)
{
    if (!xdr_ui_4(xdrs, &objp->api_version)) {
        return (FALSE);
    }
     if (! xdr_kadm5_ret_t(xdrs, &objp->code) ||
     ! xdr_long(xdrs, &objp->privs))
      return FALSE;

     return TRUE;
}

bool_t
xdr_krb5_principal(XDR *xdrs, krb5_principal *objp)
{
    int     ret;
    char        *p = NULL;
    krb5_principal  pr = NULL;
    static krb5_context context = NULL;

    /* using a static context here is ugly, but should work
       ok, and the other solutions are even uglier */

    if (!context &&
    kadm5_init_krb5_context(&context))
       return(FALSE);

    switch(xdrs->x_op) {
    case XDR_ENCODE:
    if (*objp) {
         if((ret = krb5_unparse_name(context, *objp, &p)) != 0)
          return FALSE;
    }
    if(!xdr_nullstring(xdrs, &p))
        return FALSE;
    if (p) free(p);
    break;
    case XDR_DECODE:
    if(!xdr_nullstring(xdrs, &p))
        return FALSE;
    if (p) {
         ret = krb5_parse_name(context, p, &pr);
         if(ret != 0)
          return FALSE;
         *objp = pr;
         free(p);
    } else
         *objp = NULL;
    break;
    case XDR_FREE:
    if(*objp != NULL)
        krb5_free_principal(context, *objp);
    break;
    }
    return TRUE;
}

bool_t
xdr_krb5_octet(XDR *xdrs, krb5_octet *objp)
{
   if (!xdr_u_char(xdrs, objp))
    return (FALSE);
   return (TRUE);
}

bool_t
xdr_krb5_enctype(XDR *xdrs, krb5_enctype *objp)
{
   /*
    * This used to be xdr_krb5_keytype, but keytypes and enctypes have
    * been merged into only enctypes.  However, randkey_principal
    * already ensures that only a key of ENCTYPE_DES_CBC_CRC will be
    * returned to v1 clients, and ENCTYPE_DES_CBC_CRC has the same
    * value as KEYTYPE_DES used too, which is what all v1 clients
    * expect.  Therefore, IMHO, just encoding whatever enctype we get
    * is safe.
    */

   if (!xdr_u_int(xdrs, (unsigned int *) objp))
    return (FALSE);
   return (TRUE);
}

bool_t
xdr_krb5_salttype(XDR *xdrs, krb5_int32 *objp)
{
    if (!xdr_int(xdrs, (int32_t *) objp))
    return FALSE;
    return TRUE;
}

bool_t
xdr_krb5_keyblock(XDR *xdrs, krb5_keyblock *objp)
{
   /* XXX This only works because free_keyblock assumes ->contents
      is allocated by malloc() */

   if(!xdr_krb5_enctype(xdrs, &objp->enctype))
      return FALSE;
   if(!xdr_bytes(xdrs, (char **) &objp->contents, (unsigned int *)
         &objp->length, ~0))
      return FALSE;
   return TRUE;
}