/*
 * 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);
    flags->require_pwchange =  !!(attr & KRB5_KDB_REQUIRES_PWCHANGE);
    /* HW_AUTH */
    flags->server =		!(attr & KRB5_KDB_DISALLOW_SVR);
    flags->change_pw = 	       !!(attr & KRB5_KDB_PWCHANGE_SERVICE);
    flags->client =	        !(attr & KRB5_KDB_DISALLOW_CLIENT);
    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);
    flags->materialize =       !!(attr & KRB5_KDB_MATERIALIZE);
    flags->virtual_keys =      !!(attr & KRB5_KDB_VIRTUAL_KEYS);
    flags->virtual =           !!(attr & KRB5_KDB_VIRTUAL);
    flags->no_auth_data_reqd = !!(attr & KRB5_KDB_NO_AUTH_DATA_REQUIRED);
    flags->auth_data_reqd =    !!(attr & KRB5_KDB_AUTH_DATA_REQUIRED);

    if (flags->no_auth_data_reqd && flags->auth_data_reqd)
        flags->auth_data_reqd = 0;
}

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

static kadm5_ret_t
perform_tl_data(krb5_context context,
		HDB *db,
		hdb_entry *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, pw);

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

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

	s = tl_data->tl_data_contents;

        (void) _krb5_get_int(s, &t, tl_data->tl_data_length);
        ret = hdb_entry_set_pw_change_time(context, ent, t);

    } else if (tl_data->tl_data_type == KRB5_TL_KEY_ROTATION) {
        HDB_Ext_KeyRotation *prev_kr = 0;
	HDB_extension *prev_ext;
	HDB_extension ext;

        ext.mandatory = 0;
        ext.data.element = choice_HDB_extension_data_key_rotation;
        prev_ext = hdb_find_extension(ent, ext.data.element);
        if (prev_ext)
            prev_kr = &prev_ext->data.u.key_rotation;
        ret = decode_HDB_Ext_KeyRotation(tl_data->tl_data_contents,
                                         tl_data->tl_data_length,
                                         &ext.data.u.key_rotation, NULL);
        if (ret == 0)
            ret = hdb_validate_key_rotations(context, prev_kr,
                                             &ext.data.u.key_rotation);
        if (ret == 0)
            ret = hdb_replace_extension(context, ent, &ext);
	free_HDB_extension(&ext);
    } 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;

        if (ext.data.element == choice_HDB_extension_data_key_rotation) {
            HDB_extension *prev_ext = hdb_find_extension(ent,
                                                         ext.data.element);
            HDB_Ext_KeyRotation *prev_kr = 0;

            if (prev_ext)
                prev_kr = &prev_ext->data.u.key_rotation;
            ret = hdb_validate_key_rotations(context, prev_kr,
                                             &ext.data.u.key_rotation);
        }
	if (ret)
	    ret = KADM5_BAD_TL_TYPE; /* XXX Need new error code */
        if (ret == 0)
            ret = hdb_replace_extension(context, ent, &ext);
	free_HDB_extension(&ext);
    } else if (tl_data->tl_data_type == KRB5_TL_ETYPES) {
        if (!ent->etypes &&
            (ent->etypes = calloc(1,
                                        sizeof(ent->etypes[0]))) == NULL)
            ret = krb5_enomem(context);
        if (ent->etypes)
            free_HDB_EncTypeList(ent->etypes);
        if (ret == 0)
            ret = decode_HDB_EncTypeList(tl_data->tl_data_contents,
                                         tl_data->tl_data_length,
                                         ent->etypes, NULL);
	if (ret)
	    return KADM5_BAD_TL_TYPE;
    } else if (tl_data->tl_data_type == KRB5_TL_ALIASES) {
        return 0;
    } else {
	return KADM5_BAD_TL_TYPE;
    }
    return ret;
}

static void
default_flags(hdb_entry *ent)
{
    ent->flags.client      = 1;
    ent->flags.server      = 1;
    ent->flags.forwardable = 1;
    ent->flags.proxiable   = 1;
    ent->flags.renewable   = 1;
    ent->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 *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->valid_end, princ->princ_expire_time);
	else
	    set_null(ent->valid_end);
    }
    if(mask & KADM5_PW_EXPIRATION
       && princ_mask & KADM5_PW_EXPIRATION) {
	if (princ->pw_expiration)
	    set_value(ent->pw_end, princ->pw_expiration);
	else
	    set_null(ent->pw_end);
    }
    if(mask & KADM5_ATTRIBUTES) {
	if (princ_mask & KADM5_ATTRIBUTES) {
	    attr_to_flags(princ->attributes, &ent->flags);
	} else if(def_mask & KADM5_ATTRIBUTES) {
	    attr_to_flags(def->attributes, &ent->flags);
	    ent->flags.invalid = 0;
	} else {
	    default_flags(ent);
	}
    }

    if(mask & KADM5_MAX_LIFE) {
	if(princ_mask & KADM5_MAX_LIFE) {
	    if(princ->max_life)
	      set_value(ent->max_life, princ->max_life);
	    else
	      set_null(ent->max_life);
	} else if(def_mask & KADM5_MAX_LIFE) {
	    if(def->max_life)
	      set_value(ent->max_life, def->max_life);
	    else
	      set_null(ent->max_life);
	}
    }
    if(mask & KADM5_KVNO
       && (princ_mask & KADM5_KVNO)) {
	krb5_error_code ret;

	ret = hdb_change_kvno(context->context, princ->kvno, ent);
	if (ret && ret != HDB_ERR_KVNO_NOT_FOUND)
	    return ret;
	ent->kvno = princ->kvno; /* force it */
    }
    if(mask & KADM5_MAX_RLIFE) {
	if(princ_mask & KADM5_MAX_RLIFE) {
	  if(princ->max_renewable_life)
	    set_value(ent->max_renew, princ->max_renewable_life);
	  else
	    set_null(ent->max_renew);
	} else if(def_mask & KADM5_MAX_RLIFE) {
	  if(def->max_renewable_life)
	    set_value(ent->max_renew, def->max_renewable_life);
	  else
	    set_null(ent->max_renew);
	}
    }
    if(mask & KADM5_KEY_DATA
       && princ_mask & KADM5_KEY_DATA) {
	_kadm5_set_keys2(context, ent,
			 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;
}