/* #pragma ident        "@(#)g_verify.c 1.13    98/04/23 SMI" */

/*
 * Copyright 1996 by Sun Microsystems, 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 Sun Microsystems not be used
 * in advertising or publicity pertaining to distribution of the software
 * without specific, written prior permission. Sun Microsystems makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 * SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL SUN MICROSYSTEMS 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.
 */

/*
 *  glue routine for gss_verify_mic
 */

#include "mglueP.h"

OM_uint32 KRB5_CALLCONV
gss_verify_mic(OM_uint32 * minor_status, gss_ctx_id_t context_handle,
               gss_buffer_t message_buffer, gss_buffer_t token_buffer,
               gss_qop_t *qop_state)
{
    OM_uint32           status;
    gss_union_ctx_id_t  ctx;
    gss_mechanism       mech;


    if (minor_status == NULL)
        return (GSS_S_CALL_INACCESSIBLE_WRITE);
    *minor_status = 0;

    if (context_handle == GSS_C_NO_CONTEXT)
        return (GSS_S_CALL_INACCESSIBLE_READ | GSS_S_NO_CONTEXT);

    if ((message_buffer == GSS_C_NO_BUFFER) ||
        GSS_EMPTY_BUFFER(token_buffer))

        return (GSS_S_CALL_INACCESSIBLE_READ);

    /*
     * select the approprate underlying mechanism routine and
     * call it.
     */

    ctx = (gss_union_ctx_id_t) context_handle;
    if (ctx->internal_ctx_id == GSS_C_NO_CONTEXT)
        return (GSS_S_NO_CONTEXT);
    mech = gssint_get_mechanism (ctx->mech_type);

    if (mech) {
        if (mech->gss_verify_mic) {
            status = mech->gss_verify_mic(
                                          minor_status,
                                          ctx->internal_ctx_id,
                                          message_buffer,
                                          token_buffer,
                                          qop_state);
            if (status != GSS_S_COMPLETE)
                map_error(minor_status, mech);
        } else
            status = GSS_S_UNAVAILABLE;

        return(status);
    }

    return (GSS_S_BAD_MECH);
}

OM_uint32 KRB5_CALLCONV
gss_verify(OM_uint32 *minor_status, gss_ctx_id_t context_handle,
           gss_buffer_t message_buffer, gss_buffer_t token_buffer,
           int *qop_state)
{
        return (gss_verify_mic(minor_status, context_handle,
                               message_buffer, token_buffer,
                               (gss_qop_t *) qop_state));
}