1 /*
2 * Copyright 1995-2020 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 /*
11 * DES low level APIs are deprecated for public use, but still ok for internal
12 * use.
13 */
14 #include "internal/deprecated.h"
15
16 #include <openssl/des.h>
17 #include "cipher_tdes_default.h"
18
19 /*
20 * Note the PROV_TDES_CTX has been used for the DESX cipher, just to reduce
21 * code size.
22 */
23 #define ks1 tks.ks[0]
24 #define ks2 tks.ks[1].ks[0].cblock
25 #define ks3 tks.ks[2].ks[0].cblock
26
cipher_hw_desx_cbc_initkey(PROV_CIPHER_CTX * ctx,const unsigned char * key,size_t keylen)27 static int cipher_hw_desx_cbc_initkey(PROV_CIPHER_CTX *ctx,
28 const unsigned char *key, size_t keylen)
29 {
30 PROV_TDES_CTX *tctx = (PROV_TDES_CTX *)ctx;
31 DES_cblock *deskey = (DES_cblock *)key;
32
33 DES_set_key_unchecked(deskey, &tctx->ks1);
34 memcpy(&tctx->ks2, &key[8], 8);
35 memcpy(&tctx->ks3, &key[16], 8);
36
37 return 1;
38 }
39
cipher_hw_desx_copyctx(PROV_CIPHER_CTX * dst,const PROV_CIPHER_CTX * src)40 static void cipher_hw_desx_copyctx(PROV_CIPHER_CTX *dst,
41 const PROV_CIPHER_CTX *src)
42 {
43 PROV_TDES_CTX *sctx = (PROV_TDES_CTX *)src;
44 PROV_TDES_CTX *dctx = (PROV_TDES_CTX *)dst;
45
46 *dctx = *sctx;
47 dst->ks = &dctx->tks.ks;
48 }
49
cipher_hw_desx_cbc(PROV_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t inl)50 static int cipher_hw_desx_cbc(PROV_CIPHER_CTX *ctx, unsigned char *out,
51 const unsigned char *in, size_t inl)
52 {
53 PROV_TDES_CTX *tctx = (PROV_TDES_CTX *)ctx;
54
55 while (inl >= MAXCHUNK) {
56 DES_xcbc_encrypt(in, out, (long)MAXCHUNK, &tctx->ks1,
57 (DES_cblock *)ctx->iv, &tctx->ks2, &tctx->ks3,
58 ctx->enc);
59 inl -= MAXCHUNK;
60 in += MAXCHUNK;
61 out += MAXCHUNK;
62 }
63 if (inl > 0)
64 DES_xcbc_encrypt(in, out, (long)inl, &tctx->ks1,
65 (DES_cblock *)ctx->iv, &tctx->ks2, &tctx->ks3,
66 ctx->enc);
67 return 1;
68 }
69
70 static const PROV_CIPHER_HW desx_cbc =
71 {
72 cipher_hw_desx_cbc_initkey,
73 cipher_hw_desx_cbc,
74 cipher_hw_desx_copyctx
75 };
76
ossl_prov_cipher_hw_tdes_desx_cbc(void)77 const PROV_CIPHER_HW *ossl_prov_cipher_hw_tdes_desx_cbc(void)
78 {
79 return &desx_cbc;
80 }
81