/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 * Copyright 1993 by OpenVision Technologies, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appears in all copies and
 * that both that copyright notice and this permission notice appear in
 * supporting documentation, and that the name of OpenVision not be used
 * in advertising or publicity pertaining to distribution of the software
 * without specific, written prior permission. OpenVision makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 * OPENVISION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL OPENVISION BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
 * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#include "gssapiP_krb5.h"

/*
 * $Id$
 */

OM_uint32 KRB5_CALLCONV
krb5_gss_process_context_token(OM_uint32 *minor_status,
                               gss_ctx_id_t context_handle,
                               gss_buffer_t token_buffer)
{
    krb5_gss_ctx_id_rec *ctx;
    OM_uint32 majerr;
    struct k5input in;
    gss_buffer_desc empty = { 0 };

    ctx = (krb5_gss_ctx_id_t) context_handle;

    if (ctx->terminated || !ctx->established) {
        *minor_status = KG_CTX_INCOMPLETE;
        return(GSS_S_NO_CONTEXT);
    }

    /* We only support context deletion tokens for now, and RFC 4121 does not
     * define a context deletion token. */
    if (ctx->proto) {
        *minor_status = 0;
        return(GSS_S_DEFECTIVE_TOKEN);
    }

    k5_input_init(&in, token_buffer->value, token_buffer->length);
    (void)g_verify_token_header(&in, ctx->mech_used);

    majerr = kg_verify_mic_v1(ctx->k5_context, minor_status, ctx,
                              KG_TOK_DEL_CTX, &in, &empty);
    if (GSS_ERROR(majerr)) {
        save_error_info(*minor_status, ctx->k5_context);
        return(majerr);
    }

    /* Mark the context as terminated, but do not delete it (as that would
     * leave the caller with a dangling context handle). */
    ctx->terminated = 1;
    return(GSS_S_COMPLETE);
}