lib/libgss/g_canon_name.c

	g_canon_name.c revision ab9b2e153c3a9a2b1141fefa87925b1a9beb1236
/*
 * 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 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

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

/*
 * routine gss_canonicalize_name
 *
 * This routine is used to produce a mechanism specific
 * representation of name that has been previously
 * imported with gss_import_name.  The routine uses the mechanism
 * specific implementation of gss_import_name to implement this
 * function.
 *
 * We allow a NULL output_name, in which case we modify the
 * input_name to include the mechanism specific name.
 */

#include <mechglueP.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <string.h>
#include <errno.h>

OM_uint32
gss_canonicalize_name(minor_status,
                input_name,
                mech_type,
                output_name)
OM_uint32 *minor_status;
const gss_name_t input_name;
const gss_OID mech_type;
gss_name_t *output_name;
{
    gss_union_name_t in_union, out_union = NULL, dest_union = NULL;
    OM_uint32 major_status = GSS_S_FAILURE;

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

    *minor_status = 0;

    if (output_name)
        *output_name = 0;

    /* check the input parameters */
    if (input_name == NULL || mech_type == GSS_C_NULL_OID)
        return (GSS_S_CALL_INACCESSIBLE_READ);

    in_union = (gss_union_name_t)input_name;
    /*
     * If the caller wants to reuse the name, and the name has already
     * been converted, then there is nothing for us to do.
     */
    if (!output_name && in_union->mech_type &&
        g_OID_equal(in_union->mech_type, mech_type))
        return (GSS_S_COMPLETE);

    /* ok, then we need to do something - start by creating data struct */
    if (output_name) {
        out_union =
            (gss_union_name_t)malloc(sizeof (gss_union_name_desc));
        if (!out_union)
            goto allocation_failure;

        out_union->mech_type = 0;
        out_union->mech_name = 0;
        out_union->name_type = 0;
        out_union->external_name = 0;

        /* Allocate the buffer for the user specified representation */
        if (gssint_create_copy_buffer(in_union->external_name,
                &out_union->external_name, 1))
            goto allocation_failure;

        if (in_union->name_type != GSS_C_NULL_OID) {
            if ((major_status = generic_gss_copy_oid(minor_status,
                in_union->name_type, &out_union->name_type)))
            goto allocation_failure;
        }

    }

    /*
     * might need to delete any old mechanism names if we are
     * reusing the buffer.
     */
    if (!output_name) {
        if (in_union->mech_type) {
            (void) __gss_release_internal_name(minor_status,
                            in_union->mech_type,
                            &in_union->mech_name);
            (void) gss_release_oid(minor_status,
                        &in_union->mech_type);
            in_union->mech_type = 0;
        }
        dest_union = in_union;
    } else
        dest_union = out_union;

    /* now let's create the new mech name */
    if (major_status = generic_gss_copy_oid(minor_status, mech_type,
                        &dest_union->mech_type))
        goto allocation_failure;

    if (major_status =
        __gss_import_internal_name(minor_status, mech_type,
                        dest_union,
                        &dest_union->mech_name))
        goto allocation_failure;

    if (output_name)
        *output_name = (gss_name_t)dest_union;

    return (GSS_S_COMPLETE);

allocation_failure:
    /* do not delete the src name external name format */
    if (output_name) {
        if (out_union->external_name) {
            if (out_union->external_name->value)
                free(out_union->external_name->value);
            free(out_union->external_name);
        }
        if (out_union->name_type)
            (void) gss_release_oid(minor_status,
                        &out_union->name_type);

        dest_union = out_union;
    } else
        dest_union = in_union;

    /*
     * delete the partially created mech specific name
     * applies for both src and dest which ever is being used for output
     */

    if (dest_union->mech_name) {
        (void) __gss_release_internal_name(minor_status,
                        dest_union->mech_type,
                        &dest_union->mech_name);
    }

    if (dest_union->mech_type)
        (void) gss_release_oid(minor_status, &dest_union->mech_type);


    if (output_name)
        free(out_union);

    return (major_status);
} /**********  gss_canonicalize_name ********/