/*-
 * Copyright (c) 2005 Doug Rabson
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	$FreeBSD: src/lib/libgssapi/gss_utils.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
 */

#include "mech_locl.h"

OM_uint32
_gss_copy_oid(OM_uint32 *minor_status,
    gss_const_OID from_oid, gss_OID to_oid)
{
	size_t len = from_oid->length;

	*minor_status = 0;
	to_oid->elements = malloc(len);
	if (!to_oid->elements) {
		to_oid->length = 0;
		*minor_status = ENOMEM;
		return GSS_S_FAILURE;
	}
	to_oid->length = len;
	memcpy(to_oid->elements, from_oid->elements, len);
	return (GSS_S_COMPLETE);
}

OM_uint32
_gss_free_oid(OM_uint32 *minor_status, gss_OID oid)
{
	*minor_status = 0;
	if (oid->elements) {
	    free(oid->elements);
	    oid->elements = NULL;
	    oid->length = 0;
	}
	return (GSS_S_COMPLETE);
}

OM_uint32
_gss_copy_buffer(OM_uint32 *minor_status,
    const gss_buffer_t from_buf, gss_buffer_t to_buf)
{
	size_t len = from_buf->length;

	*minor_status = 0;
	to_buf->value = malloc(len);
	if (!to_buf->value) {
		*minor_status = ENOMEM;
		to_buf->length = 0;
		return GSS_S_FAILURE;
	}
	to_buf->length = len;
	memcpy(to_buf->value, from_buf->value, len);
	return (GSS_S_COMPLETE);
}

void
_gss_mg_encode_le_uint32(uint32_t n, uint8_t *p)
{
    p[0] = (n >> 0 ) & 0xFF;
    p[1] = (n >> 8 ) & 0xFF;
    p[2] = (n >> 16) & 0xFF;
    p[3] = (n >> 24) & 0xFF;
}

void
_gss_mg_decode_le_uint32(const void *ptr, uint32_t *n)
{
    const uint8_t *p = ptr;
    *n = (p[0] << 0) | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
}

void
_gss_mg_encode_be_uint32(uint32_t n, uint8_t *p)
{
    p[0] = (n >> 24) & 0xFF;
    p[1] = (n >> 16) & 0xFF;
    p[2] = (n >> 8 ) & 0xFF;
    p[3] = (n >> 0 ) & 0xFF;
}

void
_gss_mg_decode_be_uint32(const void *ptr, uint32_t *n)
{
    const uint8_t *p = ptr;
    *n = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | (p[3] << 0);
}