lib/libgss/g_seal.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
 */

/*
 *  glue routine for gss_seal
 */

#include <mechglueP.h>
#include "gssapiP_generic.h"


static OM_uint32
val_seal_args(
    OM_uint32 *minor_status,
    gss_ctx_id_t context_handle,
    gss_buffer_t input_message_buffer,
    gss_buffer_t output_message_buffer)
{

    /* Initialize outputs. */

    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;
    }

    /* Validate arguments. */

    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)
        return (GSS_S_CALL_INACCESSIBLE_READ);

    if (output_message_buffer == GSS_C_NO_BUFFER)
        return (GSS_S_CALL_INACCESSIBLE_WRITE);

    return (GSS_S_COMPLETE);
}

/*ARGSUSED*/
OM_uint32
gss_seal(minor_status,
        context_handle,
        conf_req_flag,
        qop_req,
        input_message_buffer,
        conf_state,
        output_message_buffer)

OM_uint32 *         minor_status;
gss_ctx_id_t            context_handle;
int             conf_req_flag;
int             qop_req;
gss_buffer_t            input_message_buffer;
int *               conf_state;
gss_buffer_t            output_message_buffer;
{
    OM_uint32       status;
    gss_union_ctx_id_t  ctx;
    gss_mechanism       mech;

    status = val_seal_args(minor_status,
            context_handle,
            input_message_buffer,
            output_message_buffer);
    if (status != GSS_S_COMPLETE)
        return (status);

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

    ctx = (gss_union_ctx_id_t) context_handle;
    mech = __gss_get_mechanism(ctx->mech_type);

    if (mech) {
        if (mech->gss_seal) {
            status = mech->gss_seal(
                        mech->context,
                        minor_status,
                        ctx->internal_ctx_id,
                        conf_req_flag,
                        qop_req,
                        input_message_buffer,
                        conf_state,
                        output_message_buffer);
            if (status != GSS_S_COMPLETE)
                map_error(minor_status, mech);
        } else
            status = GSS_S_UNAVAILABLE;

        return (status);
    }

    return (GSS_S_BAD_MECH);
}

OM_uint32
gss_wrap(minor_status,
        context_handle,
        conf_req_flag,
        qop_req,
        input_message_buffer,
        conf_state,
        output_message_buffer)

OM_uint32 *         minor_status;
const gss_ctx_id_t      context_handle;
int             conf_req_flag;
gss_qop_t           qop_req;
const gss_buffer_t      input_message_buffer;
int *               conf_state;
gss_buffer_t            output_message_buffer;

{
    return gss_seal(minor_status, (gss_ctx_id_t)context_handle,
            conf_req_flag, (int) qop_req,
            (gss_buffer_t)input_message_buffer, conf_state,
            output_message_buffer);
}

/*
 * New for V2
 */
OM_uint32
gss_wrap_size_limit(minor_status, context_handle, conf_req_flag,
                qop_req, req_output_size, max_input_size)
    OM_uint32       *minor_status;
    const gss_ctx_id_t  context_handle;
    int         conf_req_flag;
    gss_qop_t       qop_req;
    OM_uint32       req_output_size;
    OM_uint32       *max_input_size;
{
    gss_union_ctx_id_t  ctx;
    gss_mechanism       mech;
    OM_uint32         major_status;

    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 (max_input_size == NULL)
        return (GSS_S_CALL_INACCESSIBLE_WRITE);

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

    ctx = (gss_union_ctx_id_t) context_handle;
    mech = __gss_get_mechanism(ctx->mech_type);

    if (!mech)
        return (GSS_S_BAD_MECH);

    if (mech->gss_wrap_size_limit)
        major_status = mech->gss_wrap_size_limit(mech->context,
                            minor_status,
                            ctx->internal_ctx_id,
                            conf_req_flag, qop_req,
                            req_output_size,
                            max_input_size);
    else
        major_status = GSS_S_UNAVAILABLE;
    if (major_status != GSS_S_COMPLETE)
        map_error(minor_status, mech);
    return major_status;
}