/* #pragma ident	"@(#)g_unseal.c	1.13	98/01/22 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 gss_unwrap

 */

#include "mglueP.h"

OM_uint32 KRB5_CALLCONV

gss_unwrap (minor_status,

            context_handle,

            input_message_buffer,

            output_message_buffer,

            conf_state,

            qop_state)

OM_uint32 *		minor_status;

gss_ctx_id_t		context_handle;

gss_buffer_t		input_message_buffer;

gss_buffer_t		output_message_buffer;

int *			conf_state;

gss_qop_t *		qop_state;

{

/* EXPORT DELETE START */

    OM_uint32		status;

    gss_union_ctx_id_t	ctx;

    gss_mechanism	mech;

    if (minor_status != NULL)

	*minor_status = 0;

    if (output_message_buffer != GSS_C_NO_BUFFER) {

	output_message_buffer->length = 0;

	output_message_buffer->value = NULL;

    }

    if (minor_status == NULL)

	return (GSS_S_CALL_INACCESSIBLE_WRITE);

    if (context_handle == GSS_C_NO_CONTEXT)

	return (GSS_S_CALL_INACCESSIBLE_READ | GSS_S_NO_CONTEXT);

    if (input_message_buffer == GSS_C_NO_BUFFER ||

	GSS_EMPTY_BUFFER(input_message_buffer))

	return (GSS_S_CALL_INACCESSIBLE_READ);

    if (output_message_buffer == GSS_C_NO_BUFFER)

	return (GSS_S_CALL_INACCESSIBLE_WRITE);

    /*

     * 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_unwrap) {

	    status = mech->gss_unwrap(minor_status,

				      ctx->internal_ctx_id,

				      input_message_buffer,

				      output_message_buffer,

				      conf_state,

				      qop_state);

	    if (status != GSS_S_COMPLETE)

		map_error(minor_status, mech);

	} else if (mech->gss_unwrap_aead || mech->gss_unwrap_iov) {

	    status = gssint_unwrap_aead(mech,

					minor_status,

					ctx,

					input_message_buffer,

					GSS_C_NO_BUFFER,

					output_message_buffer,

					conf_state,

					(gss_qop_t *)qop_state);

	} else

	    status = GSS_S_UNAVAILABLE;

	return(status);

    }

/* EXPORT DELETE END */

    return (GSS_S_BAD_MECH);

}

OM_uint32 KRB5_CALLCONV

gss_unseal (minor_status,

            context_handle,

            input_message_buffer,

            output_message_buffer,

            conf_state,

            qop_state)

OM_uint32 *		minor_status;

gss_ctx_id_t		context_handle;

gss_buffer_t		input_message_buffer;

gss_buffer_t		output_message_buffer;

int *			conf_state;

int *			qop_state;

{

    return (gss_unwrap(minor_status, context_handle,

		       input_message_buffer,

		       output_message_buffer, conf_state, (gss_qop_t *) qop_state));

}