1/**********************************************************************
2 *                         gost_keywrap.h                             *
3 *             Copyright (c) 2005-2006 Cryptocom LTD                  *
4 *       This file is distributed under the same license as OpenSSL   *
5 *                                                                    *
6 * Implementation of CryptoPro key wrap algorithm, as defined in      *
7 * RFC 4357 p 6.3 and 6.4                                             *
8 * Doesn't need OpenSSL                                               *
9 **********************************************************************/
10#ifndef GOST_KEYWRAP_H
11#define GOST_KEYWRAP_H
12#include <string.h>
13#include "gost89.h"
14/* Diversifies key using random UserKey Material
15 * Implements RFC 4357 p 6.5 key diversification algorithm
16 *
17 * inputKey - 32byte key to be diversified
18 * ukm - 8byte user key material
19 * outputKey - 32byte buffer to store diversified key
20 *
21 */
22void keyDiversifyCryptoPro(gost_ctx *ctx,
23	const unsigned char *inputKey,
24	const unsigned char *ukm,
25	unsigned char *outputKey);
26/*
27 * Wraps key using RFC 4357 6.3
28 * ctx - gost encryption context, initialized with some S-boxes
29 * keyExchangeKey (KEK) 32-byte (256-bit) shared key
30 * ukm - 8 byte (64 bit) user key material,
31 * sessionKey - 32-byte (256-bit) key to be wrapped
32 * wrappedKey - 44-byte buffer to store wrapped key
33 */
34
35int keyWrapCryptoPro(gost_ctx *ctx,
36	const unsigned char *keyExchangeKey,
37	const unsigned char *ukm,
38	const	unsigned char *sessionKey,
39	unsigned char *wrappedKey) ;
40/*
41 * Unwraps key using RFC 4357 6.4
42 * ctx - gost encryption context, initialized with some S-boxes
43 * keyExchangeKey 32-byte shared key
44 * wrappedKey  44 byte key to be unwrapped (concatenation of 8-byte UKM,
45 * 32 byte  encrypted key and 4 byte MAC
46 *
47 * sessionKEy - 32byte buffer to store sessionKey in
48 * Returns 1 if key is decrypted successfully, and 0 if MAC doesn't match
49 */
50
51
52int keyUnwrapCryptoPro(gost_ctx *ctx,
53	const unsigned char *keyExchangeKey,
54	const unsigned char *wrappedKey,
55	unsigned char *sessionKey) ;
56#endif
57