1/*
2 * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <openssl/des.h>
11#include "cipher_tdes_default.h"
12
13/*
14 * Note the PROV_TDES_CTX has been used for the DESX cipher, just to reduce
15 * code size.
16 */
17#define ks1 tks.ks[0]
18#define ks2 tks.ks[1].ks[0].cblock
19#define ks3 tks.ks[2].ks[0].cblock
20
21static int cipher_hw_desx_cbc_initkey(PROV_CIPHER_CTX *ctx,
22 const unsigned char *key, size_t keylen)
23{
24 PROV_TDES_CTX *tctx = (PROV_TDES_CTX *)ctx;
25 DES_cblock *deskey = (DES_cblock *)key;
26
27 DES_set_key_unchecked(deskey, &tctx->ks1);
28 memcpy(&tctx->ks2, &key[8], 8);
29 memcpy(&tctx->ks3, &key[16], 8);
30
31 return 1;
32}
33
34static int cipher_hw_desx_cbc(PROV_CIPHER_CTX *ctx, unsigned char *out,
35 const unsigned char *in, size_t inl)
36{
37 PROV_TDES_CTX *tctx = (PROV_TDES_CTX *)ctx;
38
39 while (inl >= MAXCHUNK) {
40 DES_xcbc_encrypt(in, out, (long)MAXCHUNK, &tctx->ks1,
41 (DES_cblock *)ctx->iv, &tctx->ks2, &tctx->ks3,
42 ctx->enc);
43 inl -= MAXCHUNK;
44 in += MAXCHUNK;
45 out += MAXCHUNK;
46 }
47 if (inl > 0)
48 DES_xcbc_encrypt(in, out, (long)inl, &tctx->ks1,
49 (DES_cblock *)ctx->iv, &tctx->ks2, &tctx->ks3,
50 ctx->enc);
51 return 1;
52}
53
54static const PROV_CIPHER_HW desx_cbc =
55{
56 cipher_hw_desx_cbc_initkey,
57 cipher_hw_desx_cbc
58};
59const PROV_CIPHER_HW *PROV_CIPHER_HW_tdes_desx_cbc(void)
60{
61 return &desx_cbc;
62}
63