/*
 * Copyright (c) 2000 - 2001, 2003 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 "gsskrb5_locl.h"

#if 0
OM_uint32
gss_krb5_copy_ccache(OM_uint32 *minor_status,
                     krb5_context context,
                     gss_cred_id_t cred,
                     krb5_ccache out)
{
    krb5_error_code kret;

    HEIMDAL_MUTEX_lock(&cred->cred_id_mutex);

    if (cred->ccache == NULL) {
        HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
        *minor_status = EINVAL;
        return GSS_S_FAILURE;
    }

    kret = krb5_cc_copy_cache(context, cred->ccache, out);
    HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
    if (kret) {
        *minor_status = kret;
        return GSS_S_FAILURE;
    }
    *minor_status = 0;
    return GSS_S_COMPLETE;
}
#endif


OM_uint32
_gsskrb5_krb5_import_cred(OM_uint32 *minor_status,
                          krb5_ccache id,
                          krb5_principal keytab_principal,
                          krb5_keytab keytab,
                          gss_cred_id_t *cred)
{
    krb5_context context;
    krb5_error_code kret;
    gsskrb5_cred handle;
    OM_uint32 ret;

    *cred = NULL;

    GSSAPI_KRB5_INIT (&context);

    handle = calloc(1, sizeof(*handle));
    if (handle == NULL) {
        _gsskrb5_clear_status ();
        *minor_status = ENOMEM;
        return (GSS_S_FAILURE);
    }
    HEIMDAL_MUTEX_init(&handle->cred_id_mutex);

    handle->usage = 0;

    if (id) {
        char *str;

        handle->usage |= GSS_C_INITIATE;

        kret = krb5_cc_get_principal(context, id,
                                     &handle->principal);
        if (kret) {
            free(handle);
            *minor_status = kret;
            return GSS_S_FAILURE;
        }

        if (keytab_principal) {
            krb5_boolean match;

            match = krb5_principal_compare(context,
                                           handle->principal,
                                           keytab_principal);
            if (match == FALSE) {
                krb5_free_principal(context, handle->principal);
                free(handle);
                _gsskrb5_clear_status ();
                *minor_status = EINVAL;
                return GSS_S_FAILURE;
            }
        }

        ret = __gsskrb5_ccache_lifetime(minor_status,
                                        context,
                                        id,
                                        handle->principal,
                                        &handle->lifetime);
        if (ret != GSS_S_COMPLETE) {
            krb5_free_principal(context, handle->principal);
            free(handle);
            return ret;
        }


        kret = krb5_cc_get_full_name(context, id, &str);
        if (kret)
            goto out;

        kret = krb5_cc_resolve(context, str, &handle->ccache);
        free(str);
        if (kret)
            goto out;
    }


    if (keytab) {
        char *str;

        handle->usage |= GSS_C_ACCEPT;

        if (keytab_principal && handle->principal == NULL) {
            kret = krb5_copy_principal(context,
                                       keytab_principal,
                                       &handle->principal);
            if (kret)
                goto out;
        }

        kret = krb5_kt_get_full_name(context, keytab, &str);
        if (kret)
            goto out;

        kret = krb5_kt_resolve(context, str, &handle->keytab);
        free(str);
        if (kret)
            goto out;
    }


    if (id || keytab) {
        ret = gss_create_empty_oid_set(minor_status, &handle->mechanisms);
        if (ret == GSS_S_COMPLETE)
            ret = gss_add_oid_set_member(minor_status, GSS_KRB5_MECHANISM,
                                         &handle->mechanisms);
        if (ret != GSS_S_COMPLETE) {
            kret = *minor_status;
            goto out;
        }
    }

    *minor_status = 0;
    *cred = (gss_cred_id_t)handle;
    return GSS_S_COMPLETE;

out:
    gss_release_oid_set(minor_status, &handle->mechanisms);
    if (handle->ccache)
        krb5_cc_close(context, handle->ccache);
    if (handle->keytab)
        krb5_kt_close(context, handle->keytab);
    if (handle->principal)
        krb5_free_principal(context, handle->principal);
    HEIMDAL_MUTEX_destroy(&handle->cred_id_mutex);
    free(handle);
    *minor_status = kret;
    return GSS_S_FAILURE;
}