/*-
 * Copyright (c) 2005 Doug Rabson
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 *      $FreeBSD: src/lib/libgssapi/gss_add_cred.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
 */

#include "mech_locl.h"

GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
gss_add_cred_with_password(OM_uint32 *minor_status,
    const gss_cred_id_t input_cred_handle,
    const gss_name_t desired_name,
    const gss_OID desired_mech,
    const gss_buffer_t password,
    gss_cred_usage_t cred_usage,
    OM_uint32 initiator_time_req,
    OM_uint32 acceptor_time_req,
    gss_cred_id_t *output_cred_handle,
    gss_OID_set *actual_mechs,
    OM_uint32 *initiator_time_rec,
    OM_uint32 *acceptor_time_rec)
{
        OM_uint32 major_status;
        gssapi_mech_interface m;
        struct _gss_cred *cred = (struct _gss_cred *) input_cred_handle;
        struct _gss_cred *new_cred;
        struct _gss_mechanism_cred *mc;
        struct _gss_mechanism_name *mn = NULL;
        OM_uint32 junk, time_req;

        *minor_status = 0;
        *output_cred_handle = GSS_C_NO_CREDENTIAL;
        if (initiator_time_rec)
            *initiator_time_rec = 0;
        if (acceptor_time_rec)
            *acceptor_time_rec = 0;
        if (actual_mechs)
            *actual_mechs = GSS_C_NO_OID_SET;

        m = __gss_get_mechanism(desired_mech);
        if (m == NULL) {
                *minor_status = 0;
                return (GSS_S_BAD_MECH);
        }

        new_cred = calloc(1, sizeof(struct _gss_cred));
        if (new_cred == NULL) {
                *minor_status = ENOMEM;
                return (GSS_S_FAILURE);
        }
        HEIM_SLIST_INIT(&new_cred->gc_mc);

        /*
         * Copy credentials from un-desired mechanisms to the new credential.
         */
        if (cred) {
                HEIM_SLIST_FOREACH(mc, &cred->gc_mc, gmc_link) {
                        struct _gss_mechanism_cred *copy_mc;

                        if (gss_oid_equal(mc->gmc_mech_oid, desired_mech)) {
                                continue;
                        }
                        copy_mc = _gss_copy_cred(mc);
                        if (copy_mc == NULL) {
                                gss_release_cred(&junk, (gss_cred_id_t *)&new_cred);
                                *minor_status = ENOMEM;
                                return (GSS_S_FAILURE);
                        }
                        HEIM_SLIST_INSERT_HEAD(&new_cred->gc_mc, copy_mc, gmc_link);
                }
        }

        /*
         * Figure out a suitable mn, if any.
         */
        if (desired_name != GSS_C_NO_NAME) {
                major_status = _gss_find_mn(minor_status,
                                            (struct _gss_name *) desired_name,
                                            desired_mech,
                                            &mn);
                if (major_status != GSS_S_COMPLETE) {
                        gss_release_cred(&junk, (gss_cred_id_t *)&new_cred);
                        return (major_status);
                }
        }

        if (cred_usage == GSS_C_BOTH)
                time_req = initiator_time_req > acceptor_time_req ? acceptor_time_req : initiator_time_req;
        else if (cred_usage == GSS_C_INITIATE)
                time_req = initiator_time_req;
        else
                time_req = acceptor_time_req;

        major_status = _gss_acquire_mech_cred(minor_status, m, mn,
                                              GSS_C_CRED_PASSWORD, password,
                                              time_req, desired_mech,
                                              cred_usage, &mc);
        if (major_status != GSS_S_COMPLETE) {
                gss_release_cred(&junk, (gss_cred_id_t *)&new_cred);
                return (major_status);
        }

        HEIM_SLIST_INSERT_HEAD(&new_cred->gc_mc, mc, gmc_link);

        if (actual_mechs || initiator_time_rec || acceptor_time_rec) {
                OM_uint32 time_rec;

                major_status = gss_inquire_cred(minor_status,
                                                (gss_cred_id_t)new_cred,
                                                NULL,
                                                &time_rec,
                                                NULL,
                                                actual_mechs);
                if (GSS_ERROR(major_status)) {
                        gss_release_cred(&junk, (gss_cred_id_t *)&new_cred);
                        return (major_status);
                }
                if (initiator_time_rec &&
                    (cred_usage == GSS_C_INITIATE || cred_usage == GSS_C_BOTH))
                        *initiator_time_rec = time_rec;
                if (acceptor_time_rec &&
                    (cred_usage == GSS_C_ACCEPT || cred_usage == GSS_C_BOTH))
                        *acceptor_time_rec = time_rec;
        }

        *output_cred_handle = (gss_cred_id_t) new_cred;
        return (GSS_S_COMPLETE);
}