/*
 * Copyright (c) 1997-2004 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * 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 "ktutil_locl.h"

RCSID("$Id$");

static void*
open_kadmin_connection(char *principal,
                       const char *realm,
                       char *admin_server,
                       int server_port)
{
    static kadm5_config_params conf;
    krb5_error_code ret;
    void *kadm_handle;
    memset(&conf, 0, sizeof(conf));

    if(realm) {
        conf.realm = strdup(realm);
        if (conf.realm == NULL) {
            krb5_set_error_message(context, 0, "malloc: out of memory");
            return NULL;
        }
        conf.mask |= KADM5_CONFIG_REALM;
    }

    if (admin_server) {
        conf.admin_server = admin_server;
        conf.mask |= KADM5_CONFIG_ADMIN_SERVER;
    }

    if (server_port) {
        conf.kadmind_port = htons(server_port);
        conf.mask |= KADM5_CONFIG_KADMIND_PORT;
    }

    /* should get realm from each principal, instead of doing
       everything with the same (local) realm */

    ret = kadm5_init_with_password_ctx(context,
                                       principal,
                                       NULL,
                                       KADM5_ADMIN_SERVICE,
                                       &conf, 0, 0,
                                       &kadm_handle);
    free(conf.realm);
    if(ret) {
        krb5_warn(context, ret, "kadm5_init_with_password");
        return NULL;
    }
    return kadm_handle;
}

int
kt_get(struct get_options *opt, int argc, char **argv)
{
    krb5_error_code ret = 0;
    krb5_keytab keytab;
    void *kadm_handle = NULL;
    krb5_enctype *etypes = NULL;
    size_t netypes = 0;
    size_t i;
    int a, j;
    unsigned int failed = 0;

    if((keytab = ktutil_open_keytab()) == NULL)
        return 1;

    if(opt->realm_string)
        krb5_set_default_realm(context, opt->realm_string);

    if (opt->enctypes_strings.num_strings != 0) {

        etypes = malloc (opt->enctypes_strings.num_strings * sizeof(*etypes));
        if (etypes == NULL) {
            krb5_warnx(context, "malloc failed");
            goto out;
        }
        netypes = opt->enctypes_strings.num_strings;
        for(i = 0; i < netypes; i++) {
            ret = krb5_string_to_enctype(context,
                                         opt->enctypes_strings.strings[i],
                                         &etypes[i]);
            if(ret) {
                krb5_warnx(context, "unrecognized enctype: %s",
                           opt->enctypes_strings.strings[i]);
                goto out;
            }
        }
    }


    for(a = 0; a < argc; a++){
        krb5_principal princ_ent;
        kadm5_principal_ent_rec princ;
        int mask = 0;
        krb5_keyblock *keys;
        int n_keys;
        int created = 0;
        krb5_keytab_entry entry;

        ret = krb5_parse_name(context, argv[a], &princ_ent);
        if (ret) {
            krb5_warn(context, ret, "can't parse principal %s", argv[a]);
            failed++;
            continue;
        }
        memset(&princ, 0, sizeof(princ));
        princ.principal = princ_ent;
        mask |= KADM5_PRINCIPAL;
        princ.attributes |= KRB5_KDB_DISALLOW_ALL_TIX;
        mask |= KADM5_ATTRIBUTES;
        princ.princ_expire_time = 0;
        mask |= KADM5_PRINC_EXPIRE_TIME;

        if(kadm_handle == NULL) {
            const char *r;
            if(opt->realm_string != NULL)
                r = opt->realm_string;
            else
                r = krb5_principal_get_realm(context, princ_ent);
            kadm_handle = open_kadmin_connection(opt->principal_string,
                                                 r,
                                                 opt->admin_server_string,
                                                 opt->server_port_integer);
            if(kadm_handle == NULL)
                break;
        }

        ret = kadm5_create_principal(kadm_handle, &princ, mask, "x");
        if(ret == 0)
            created = 1;
        else if(ret != KADM5_DUP) {
            krb5_warn(context, ret, "kadm5_create_principal(%s)", argv[a]);
            krb5_free_principal(context, princ_ent);
            failed++;
            continue;
        }
        ret = kadm5_randkey_principal(kadm_handle, princ_ent, &keys, &n_keys);
        if (ret) {
            krb5_warn(context, ret, "kadm5_randkey_principal(%s)", argv[a]);
            krb5_free_principal(context, princ_ent);
            failed++;
            continue;
        }

        ret = kadm5_get_principal(kadm_handle, princ_ent, &princ,
                              KADM5_PRINCIPAL | KADM5_KVNO | KADM5_ATTRIBUTES);
        if (ret) {
            krb5_warn(context, ret, "kadm5_get_principal(%s)", argv[a]);
            for (j = 0; j < n_keys; j++)
                krb5_free_keyblock_contents(context, &keys[j]);
            krb5_free_principal(context, princ_ent);
            failed++;
            continue;
        }
        if(!created && (princ.attributes & KRB5_KDB_DISALLOW_ALL_TIX))
            krb5_warnx(context, "%s: disallow-all-tix flag set - clearing", argv[a]);
        princ.attributes &= (~KRB5_KDB_DISALLOW_ALL_TIX);
        mask = KADM5_ATTRIBUTES;
        if(created) {
            princ.kvno = 1;
            mask |= KADM5_KVNO;
        }
        ret = kadm5_modify_principal(kadm_handle, &princ, mask);
        if (ret) {
            krb5_warn(context, ret, "kadm5_modify_principal(%s)", argv[a]);
            for (j = 0; j < n_keys; j++)
                krb5_free_keyblock_contents(context, &keys[j]);
            krb5_free_principal(context, princ_ent);
            failed++;
            continue;
        }
        for(j = 0; j < n_keys; j++) {
            int do_add = TRUE;

            if (netypes) {
                size_t k;

                do_add = FALSE;
                for (k = 0; k < netypes; ++k)
                    if (keys[j].keytype == etypes[k]) {
                        do_add = TRUE;
                        break;
                    }
            }
            if (do_add) {
                entry.principal = princ_ent;
                entry.vno = princ.kvno;
                entry.keyblock = keys[j];
                entry.timestamp = time (NULL);
                ret = krb5_kt_add_entry(context, keytab, &entry);
                if (ret)
                    krb5_warn(context, ret, "krb5_kt_add_entry");
            }
            krb5_free_keyblock_contents(context, &keys[j]);
        }

        kadm5_free_principal_ent(kadm_handle, &princ);
        krb5_free_principal(context, princ_ent);
    }
 out:
    free(etypes);
    if (kadm_handle)
        kadm5_destroy(kadm_handle);
    krb5_kt_close(context, keytab);
    return ret != 0 || failed > 0;
}