source: heimdal/trunk/lib/gssapi/krb5/inquire_cred.c

/*
 * Copyright (c) 1997, 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"

OM_uint32 GSSAPI_CALLCONV _gsskrb5_inquire_cred
(OM_uint32 * minor_status,
 const gss_cred_id_t cred_handle,
 gss_name_t * output_name,
 OM_uint32 * lifetime,
 gss_cred_usage_t * cred_usage,
 gss_OID_set * mechanisms
    )
{
    krb5_context context;
    gss_cred_id_t aqcred_init = GSS_C_NO_CREDENTIAL;
    gss_cred_id_t aqcred_accept = GSS_C_NO_CREDENTIAL;
    gsskrb5_cred acred = NULL, icred = NULL;
    OM_uint32 ret;

    *minor_status = 0;

    if (output_name)
        *output_name = NULL;
    if (mechanisms)
        *mechanisms = GSS_C_NO_OID_SET;

    GSSAPI_KRB5_INIT (&context);

    if (cred_handle == GSS_C_NO_CREDENTIAL) {
        ret = _gsskrb5_acquire_cred(minor_status,
                                    GSS_C_NO_NAME,
                                    GSS_C_INDEFINITE,
                                    GSS_C_NO_OID_SET,
                                    GSS_C_ACCEPT,
                                    &aqcred_accept,
                                    NULL,
                                    NULL);
        if (ret == GSS_S_COMPLETE)
            acred = (gsskrb5_cred)aqcred_accept;

        ret = _gsskrb5_acquire_cred(minor_status,
                                    GSS_C_NO_NAME,
                                    GSS_C_INDEFINITE,
                                    GSS_C_NO_OID_SET,
                                    GSS_C_INITIATE,
                                    &aqcred_init,
                                    NULL,
                                    NULL);
        if (ret == GSS_S_COMPLETE)
            icred = (gsskrb5_cred)aqcred_init;

        if (icred == NULL && acred == NULL) {
            *minor_status = 0;
            return GSS_S_NO_CRED;
        }
    } else
        acred = (gsskrb5_cred)cred_handle;

    if (acred)
        HEIMDAL_MUTEX_lock(&acred->cred_id_mutex);
    if (icred)
        HEIMDAL_MUTEX_lock(&icred->cred_id_mutex);

    if (output_name != NULL) {
        if (icred && icred->principal != NULL) {
            gss_name_t name;

            if (acred && acred->principal)
                name = (gss_name_t)acred->principal;
            else
                name = (gss_name_t)icred->principal;

            ret = _gsskrb5_duplicate_name(minor_status, name, output_name);
            if (ret)
                goto out;
        } else if (acred && acred->usage == GSS_C_ACCEPT) {
            krb5_principal princ;
            *minor_status = krb5_sname_to_principal(context, NULL,
                                                    NULL, KRB5_NT_SRV_HST,
                                                    &princ);
            if (*minor_status) {
                ret = GSS_S_FAILURE;
                goto out;
            }
            *output_name = (gss_name_t)princ;
        } else {
            krb5_principal princ;
            *minor_status = krb5_get_default_principal(context,
                                                       &princ);
            if (*minor_status) {
                ret = GSS_S_FAILURE;
                goto out;
            }
            *output_name = (gss_name_t)princ;
        }
    }
    if (lifetime != NULL) {
        OM_uint32 alife = GSS_C_INDEFINITE, ilife = GSS_C_INDEFINITE;

        if (acred) alife = acred->lifetime;
        if (icred) ilife = icred->lifetime;

        ret = _gsskrb5_lifetime_left(minor_status,
                                     context,
                                     min(alife,ilife),
                                     lifetime);
        if (ret)
            goto out;
    }
    if (cred_usage != NULL) {
        if (acred && icred)
            *cred_usage = GSS_C_BOTH;
        else if (acred)
            *cred_usage = GSS_C_ACCEPT;
        else if (icred)
            *cred_usage = GSS_C_INITIATE;
        else
            abort();
    }

    if (mechanisms != NULL) {
        ret = gss_create_empty_oid_set(minor_status, mechanisms);
        if (ret)
            goto out;
        if (acred)
            ret = gss_add_oid_set_member(minor_status,
                                         &acred->mechanisms->elements[0],
                                         mechanisms);
        if (ret == GSS_S_COMPLETE && icred)
            ret = gss_add_oid_set_member(minor_status,
                                         &icred->mechanisms->elements[0],
                                         mechanisms);
        if (ret)
            goto out;
    }
    ret = GSS_S_COMPLETE;
out:
    if (acred)
        HEIMDAL_MUTEX_unlock(&acred->cred_id_mutex);
    if (icred)
        HEIMDAL_MUTEX_unlock(&icred->cred_id_mutex);

    if (aqcred_init != GSS_C_NO_CREDENTIAL)
        ret = _gsskrb5_release_cred(minor_status, &aqcred_init);
    if (aqcred_accept != GSS_C_NO_CREDENTIAL)
        ret = _gsskrb5_release_cred(minor_status, &aqcred_accept);

    return ret;
}