1/*
2 * Copyright 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 "prov/ciphercommon.h"
11#include "cipher_tdes.h"
12#include "crypto/rand.h"
13#include "prov/implementations.h"
14#include "prov/providercommonerr.h"
15
16void *tdes_newctx(void *provctx, int mode, size_t kbits, size_t blkbits,
17 size_t ivbits, uint64_t flags, const PROV_CIPHER_HW *hw)
18{
19 PROV_TDES_CTX *tctx = OPENSSL_zalloc(sizeof(*tctx));
20
21 if (tctx != NULL)
22 cipher_generic_initkey(tctx, kbits, blkbits, ivbits, mode, flags, hw,
23 provctx);
24 return tctx;
25}
26
27void tdes_freectx(void *vctx)
28{
29 PROV_TDES_CTX *ctx = (PROV_TDES_CTX *)vctx;
30
31 OPENSSL_clear_free(ctx, sizeof(*ctx));
32}
33
34static int tdes_init(void *vctx, const unsigned char *key, size_t keylen,
35 const unsigned char *iv, size_t ivlen, int enc)
36{
37 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
38
39 ctx->enc = enc;
40
41 if (iv != NULL) {
42 if (!cipher_generic_initiv(ctx, iv, ivlen))
43 return 0;
44 }
45
46 if (key != NULL) {
47 if (keylen != ctx->keylen) {
48 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEYLEN);
49 return 0;
50 }
51 return ctx->hw->init(ctx, key, ctx->keylen);
52 }
53 return 1;
54}
55
56int tdes_einit(void *vctx, const unsigned char *key, size_t keylen,
57 const unsigned char *iv, size_t ivlen)
58{
59 return tdes_init(vctx, key, keylen, iv, ivlen, 1);
60}
61
62int tdes_dinit(void *vctx, const unsigned char *key, size_t keylen,
63 const unsigned char *iv, size_t ivlen)
64{
65 return tdes_init(vctx, key, keylen, iv, ivlen, 0);
66}
67
68static int tdes_generatekey(PROV_CIPHER_CTX *ctx, void *ptr)
69{
70
71 DES_cblock *deskey = ptr;
72 size_t kl = ctx->keylen;
73
74 if (kl == 0 || rand_priv_bytes_ex(ctx->libctx, ptr, kl) <= 0)
75 return 0;
76 DES_set_odd_parity(deskey);
77 if (kl >= 16)
78 DES_set_odd_parity(deskey + 1);
79 if (kl >= 24) {
80 DES_set_odd_parity(deskey + 2);
81 return 1;
82 }
83 return 0;
84}
85
86CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_START(tdes)
87 OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY, NULL, 0),
88CIPHER_DEFAULT_GETTABLE_CTX_PARAMS_END(tdes)
89
90int tdes_get_ctx_params(void *vctx, OSSL_PARAM params[])
91{
92 PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
93 OSSL_PARAM *p;
94
95 if (!cipher_generic_get_ctx_params(vctx, params))
96 return 0;
97
98 p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_RANDOM_KEY);
99 if (p != NULL && !tdes_generatekey(ctx, p->data)) {
100 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GENERATE_KEY);
101 return 0;
102 }
103 return 1;
104}
105
106/*
107 * TODO(3.0) - ECB mode does not use an IV - but existing test code is setting
108 * an IV. Fixing this could potentially make applications break.
109 */
110
111/* tdes_ede3_ecb_functions */
112IMPLEMENT_tdes_cipher(ede3, EDE3, ecb, ECB, TDES_FLAGS, 64*3, 64, 64, block);
113/* tdes_ede3_cbc_functions */
114IMPLEMENT_tdes_cipher(ede3, EDE3, cbc, CBC, TDES_FLAGS, 64*3, 64, 64, block);
115