lib/libgss/g_imp_sec_context.c

	g_imp_sec_context.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 *  glue routine gss_export_sec_context
 */

#include <mechglueP.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>

OM_uint32
gss_import_sec_context(minor_status,
            interprocess_token,
            context_handle)

OM_uint32 *     minor_status;
const gss_buffer_t  interprocess_token;
gss_ctx_id_t        *context_handle;

{
    OM_uint32       length = 0;
    OM_uint32       status;
    char            *p;
    gss_union_ctx_id_t  ctx;
    gss_buffer_desc     token;
    gss_mechanism       mech;

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

    if (context_handle == NULL)
        return (GSS_S_CALL_INACCESSIBLE_WRITE | GSS_S_NO_CONTEXT);
    *context_handle = GSS_C_NO_CONTEXT;

    if (GSS_EMPTY_BUFFER(interprocess_token))
        return (GSS_S_CALL_INACCESSIBLE_READ | GSS_S_DEFECTIVE_TOKEN);

    status = GSS_S_FAILURE;

    ctx = (gss_union_ctx_id_t)malloc(sizeof (gss_union_ctx_id_desc));
    if (!ctx)
        return (GSS_S_FAILURE);

    ctx->mech_type = (gss_OID) malloc(sizeof (gss_OID_desc));
    if (!ctx->mech_type) {
        free(ctx);
        return (GSS_S_FAILURE);
    }

    if (interprocess_token->length >= sizeof (OM_uint32)) {
        p = interprocess_token->value;
        length = (OM_uint32)*p++;
        length = (OM_uint32)(length << 8) + *p++;
        length = (OM_uint32)(length << 8) + *p++;
        length = (OM_uint32)(length << 8) + *p++;
    }

    if (length == 0 ||
        length > (interprocess_token->length - sizeof (OM_uint32))) {
        free(ctx);
        return (GSS_S_CALL_BAD_STRUCTURE | GSS_S_DEFECTIVE_TOKEN);
    }

    ctx->mech_type->length = length;
    ctx->mech_type->elements = malloc(length);
    if (!ctx->mech_type->elements) {
        goto error_out;
    }
    (void) memcpy(ctx->mech_type->elements, p, length);
    p += length;

    token.length = interprocess_token->length - sizeof (OM_uint32) - length;
    token.value = p;

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

    mech = __gss_get_mechanism(ctx->mech_type);
    if (!mech) {
        status = GSS_S_BAD_MECH;
        goto error_out;
    }
    if (!mech->gss_import_sec_context) {
        status = GSS_S_UNAVAILABLE;
        goto error_out;
    }

    status = mech->gss_import_sec_context(mech->context, minor_status,
                    &token, &ctx->internal_ctx_id);

    if (status == GSS_S_COMPLETE) {
        *context_handle = (gss_ctx_id_t)ctx;
        return (GSS_S_COMPLETE);
    }

error_out:
    if (ctx) {
        if (ctx->mech_type) {
            if (ctx->mech_type->elements)
                free(ctx->mech_type->elements);
            free(ctx->mech_type);
        }
        free(ctx);
    }
    return (status);
}