/*
 * Copyright (c) 1997 - 2000 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 *
 * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "kadm5_locl.h"

RCSID("$Id$");

#define set_value(X, V) do { if((X) == NULL) (X) = malloc(sizeof(*(X))); *(X) = V; } while(0)
#define set_null(X)     do { if((X) != NULL) free((X)); (X) = NULL; } while (0)

static void
attr_to_flags(unsigned attr, HDBFlags *flags)
{
    flags->postdate =           !(attr & KRB5_KDB_DISALLOW_POSTDATED);
    flags->forwardable =        !(attr & KRB5_KDB_DISALLOW_FORWARDABLE);
    flags->initial =           !!(attr & KRB5_KDB_DISALLOW_TGT_BASED);
    flags->renewable =          !(attr & KRB5_KDB_DISALLOW_RENEWABLE);
    flags->proxiable =          !(attr & KRB5_KDB_DISALLOW_PROXIABLE);
    /* DUP_SKEY */
    flags->invalid =           !!(attr & KRB5_KDB_DISALLOW_ALL_TIX);
    flags->require_preauth =   !!(attr & KRB5_KDB_REQUIRES_PRE_AUTH);
    /* HW_AUTH */
    flags->server =             !(attr & KRB5_KDB_DISALLOW_SVR);
    flags->change_pw =         !!(attr & KRB5_KDB_PWCHANGE_SERVICE);
    flags->client =             1; /* XXX */
    flags->ok_as_delegate =    !!(attr & KRB5_KDB_OK_AS_DELEGATE);
    flags->trusted_for_delegation = !!(attr & KRB5_KDB_TRUSTED_FOR_DELEGATION);
    flags->allow_kerberos4 =   !!(attr & KRB5_KDB_ALLOW_KERBEROS4);
    flags->allow_digest =      !!(attr & KRB5_KDB_ALLOW_DIGEST);
}

/*
 * Modify the `ent' according to `tl_data'.
 */

static kadm5_ret_t
perform_tl_data(krb5_context context,
                HDB *db,
                hdb_entry_ex *ent,
                const krb5_tl_data *tl_data)
{
    kadm5_ret_t ret = 0;

    if (tl_data->tl_data_type == KRB5_TL_PASSWORD) {
        heim_utf8_string pw = tl_data->tl_data_contents;

        if (pw[tl_data->tl_data_length] != '\0')
            return KADM5_BAD_TL_TYPE;

        ret = hdb_entry_set_password(context, db, &ent->entry, pw);

    } else if (tl_data->tl_data_type == KRB5_TL_LAST_PWD_CHANGE) {
        unsigned char *s;
        time_t t;

        if (tl_data->tl_data_length != 4)
            return KADM5_BAD_TL_TYPE;

        s = tl_data->tl_data_contents;

        t = s[0] | (s[1] << 8) | (s[2] << 16) | (s[3] << 24);

        ret = hdb_entry_set_pw_change_time(context, &ent->entry, t);

    } else if (tl_data->tl_data_type == KRB5_TL_EXTENSION) {
        HDB_extension ext;

        ret = decode_HDB_extension(tl_data->tl_data_contents,
                                   tl_data->tl_data_length,
                                   &ext,
                                   NULL);
        if (ret)
            return KADM5_BAD_TL_TYPE;

        ret = hdb_replace_extension(context, &ent->entry, &ext);
        free_HDB_extension(&ext);
    } else {
        return KADM5_BAD_TL_TYPE;
    }
    return ret;
}

static void
default_flags(hdb_entry_ex *ent, int server)
{
    ent->entry.flags.client      = 1;
    ent->entry.flags.server      = !!server;
    ent->entry.flags.forwardable = 1;
    ent->entry.flags.proxiable   = 1;
    ent->entry.flags.renewable   = 1;
    ent->entry.flags.postdate    = 1;
}


/*
 * Create the hdb entry `ent' based on data from `princ' with
 * `princ_mask' specifying what fields to be gotten from there and
 * `mask' specifying what fields we want filled in.
 */

kadm5_ret_t
_kadm5_setup_entry(kadm5_server_context *context,
                   hdb_entry_ex *ent,
                   uint32_t mask,
                   kadm5_principal_ent_t princ,
                   uint32_t princ_mask,
                   kadm5_principal_ent_t def,
                   uint32_t def_mask)
{
    if(mask & KADM5_PRINC_EXPIRE_TIME
       && princ_mask & KADM5_PRINC_EXPIRE_TIME) {
        if (princ->princ_expire_time)
            set_value(ent->entry.valid_end, princ->princ_expire_time);
        else
            set_null(ent->entry.valid_end);
    }
    if(mask & KADM5_PW_EXPIRATION
       && princ_mask & KADM5_PW_EXPIRATION) {
        if (princ->pw_expiration)
            set_value(ent->entry.pw_end, princ->pw_expiration);
        else
            set_null(ent->entry.pw_end);
    }
    if(mask & KADM5_ATTRIBUTES) {
        if (princ_mask & KADM5_ATTRIBUTES) {
            attr_to_flags(princ->attributes, &ent->entry.flags);
        } else if(def_mask & KADM5_ATTRIBUTES) {
            attr_to_flags(def->attributes, &ent->entry.flags);
            ent->entry.flags.invalid = 0;
        } else {
            default_flags(ent, 1);
        }
    }

    if(mask & KADM5_MAX_LIFE) {
        if(princ_mask & KADM5_MAX_LIFE) {
            if(princ->max_life)
              set_value(ent->entry.max_life, princ->max_life);
            else
              set_null(ent->entry.max_life);
        } else if(def_mask & KADM5_MAX_LIFE) {
            if(def->max_life)
              set_value(ent->entry.max_life, def->max_life);
            else
              set_null(ent->entry.max_life);
        }
    }
    if(mask & KADM5_KVNO
       && princ_mask & KADM5_KVNO)
        ent->entry.kvno = princ->kvno;
    if(mask & KADM5_MAX_RLIFE) {
        if(princ_mask & KADM5_MAX_RLIFE) {
          if(princ->max_renewable_life)
            set_value(ent->entry.max_renew, princ->max_renewable_life);
          else
            set_null(ent->entry.max_renew);
        } else if(def_mask & KADM5_MAX_RLIFE) {
          if(def->max_renewable_life)
            set_value(ent->entry.max_renew, def->max_renewable_life);
          else
            set_null(ent->entry.max_renew);
        }
    }
    if(mask & KADM5_KEY_DATA
       && princ_mask & KADM5_KEY_DATA) {
        _kadm5_set_keys2(context, &ent->entry,
                         princ->n_key_data, princ->key_data);
    }
    if(mask & KADM5_TL_DATA) {
        krb5_tl_data *tl;

        for (tl = princ->tl_data; tl != NULL; tl = tl->tl_data_next) {
            kadm5_ret_t ret;
            ret = perform_tl_data(context->context, context->db, ent, tl);
            if (ret)
                return ret;
        }
    }
    if(mask & KADM5_FAIL_AUTH_COUNT) {
        /* XXX */
    }
    return 0;
}