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 <stdio.h>
11#include "internal/cryptlib.h"
12#ifndef OPENSSL_NO_DES
13# include <openssl/evp.h>
14# include <openssl/objects.h>
15# include "crypto/evp.h"
16# include <openssl/des.h>
17# include <openssl/rand.h>
18
19typedef struct {
20 union {
21 OSSL_UNION_ALIGN;
22 DES_key_schedule ks;
23 } ks;
24 union {
25 void (*cbc) (const void *, void *, size_t,
26 const DES_key_schedule *, unsigned char *);
27 } stream;
28} EVP_DES_KEY;
29
30# if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
31/* ----------^^^ this is not a typo, just a way to detect that
32 * assembler support was in general requested... */
33# include "sparc_arch.h"
34
35extern unsigned int OPENSSL_sparcv9cap_P[];
36
37# define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
38
39void des_t4_key_expand(const void *key, DES_key_schedule *ks);
40void des_t4_cbc_encrypt(const void *inp, void *out, size_t len,
41 const DES_key_schedule *ks, unsigned char iv[8]);
42void des_t4_cbc_decrypt(const void *inp, void *out, size_t len,
43 const DES_key_schedule *ks, unsigned char iv[8]);
44# endif
45
46static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
47 const unsigned char *iv, int enc);
48static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
49
50/*
51 * Because of various casts and different names can't use
52 * IMPLEMENT_BLOCK_CIPHER
53 */
54
55static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
56 const unsigned char *in, size_t inl)
57{
58 BLOCK_CIPHER_ecb_loop()
59 DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i),
60 EVP_CIPHER_CTX_get_cipher_data(ctx),
61 EVP_CIPHER_CTX_encrypting(ctx));
62 return 1;
63}
64
65static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
66 const unsigned char *in, size_t inl)
67{
68 while (inl >= EVP_MAXCHUNK) {
69 int num = EVP_CIPHER_CTX_num(ctx);
70 DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
71 EVP_CIPHER_CTX_get_cipher_data(ctx),
72 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num);
73 EVP_CIPHER_CTX_set_num(ctx, num);
74 inl -= EVP_MAXCHUNK;
75 in += EVP_MAXCHUNK;
76 out += EVP_MAXCHUNK;
77 }
78 if (inl) {
79 int num = EVP_CIPHER_CTX_num(ctx);
80 DES_ofb64_encrypt(in, out, (long)inl,
81 EVP_CIPHER_CTX_get_cipher_data(ctx),
82 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num);
83 EVP_CIPHER_CTX_set_num(ctx, num);
84 }
85 return 1;
86}
87
88static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
89 const unsigned char *in, size_t inl)
90{
91 EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx);
92
93 if (dat->stream.cbc != NULL) {
94 (*dat->stream.cbc) (in, out, inl, &dat->ks.ks,
95 EVP_CIPHER_CTX_iv_noconst(ctx));
96 return 1;
97 }
98 while (inl >= EVP_MAXCHUNK) {
99 DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK,
100 EVP_CIPHER_CTX_get_cipher_data(ctx),
101 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
102 EVP_CIPHER_CTX_encrypting(ctx));
103 inl -= EVP_MAXCHUNK;
104 in += EVP_MAXCHUNK;
105 out += EVP_MAXCHUNK;
106 }
107 if (inl)
108 DES_ncbc_encrypt(in, out, (long)inl,
109 EVP_CIPHER_CTX_get_cipher_data(ctx),
110 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
111 EVP_CIPHER_CTX_encrypting(ctx));
112 return 1;
113}
114
115static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
116 const unsigned char *in, size_t inl)
117{
118 while (inl >= EVP_MAXCHUNK) {
119 int num = EVP_CIPHER_CTX_num(ctx);
120 DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
121 EVP_CIPHER_CTX_get_cipher_data(ctx),
122 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num,
123 EVP_CIPHER_CTX_encrypting(ctx));
124 EVP_CIPHER_CTX_set_num(ctx, num);
125 inl -= EVP_MAXCHUNK;
126 in += EVP_MAXCHUNK;
127 out += EVP_MAXCHUNK;
128 }
129 if (inl) {
130 int num = EVP_CIPHER_CTX_num(ctx);
131 DES_cfb64_encrypt(in, out, (long)inl,
132 EVP_CIPHER_CTX_get_cipher_data(ctx),
133 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx), &num,
134 EVP_CIPHER_CTX_encrypting(ctx));
135 EVP_CIPHER_CTX_set_num(ctx, num);
136 }
137 return 1;
138}
139
140/*
141 * Although we have a CFB-r implementation for DES, it doesn't pack the right
142 * way, so wrap it here
143 */
144static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
145 const unsigned char *in, size_t inl)
146{
147 size_t n, chunk = EVP_MAXCHUNK / 8;
148 unsigned char c[1], d[1];
149
150 if (inl < chunk)
151 chunk = inl;
152
153 while (inl && inl >= chunk) {
154 for (n = 0; n < chunk * 8; ++n) {
155 c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
156 DES_cfb_encrypt(c, d, 1, 1, EVP_CIPHER_CTX_get_cipher_data(ctx),
157 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
158 EVP_CIPHER_CTX_encrypting(ctx));
159 out[n / 8] =
160 (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) |
161 ((d[0] & 0x80) >> (unsigned int)(n % 8));
162 }
163 inl -= chunk;
164 in += chunk;
165 out += chunk;
166 if (inl < chunk)
167 chunk = inl;
168 }
169
170 return 1;
171}
172
173static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
174 const unsigned char *in, size_t inl)
175{
176 while (inl >= EVP_MAXCHUNK) {
177 DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK,
178 EVP_CIPHER_CTX_get_cipher_data(ctx),
179 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
180 EVP_CIPHER_CTX_encrypting(ctx));
181 inl -= EVP_MAXCHUNK;
182 in += EVP_MAXCHUNK;
183 out += EVP_MAXCHUNK;
184 }
185 if (inl)
186 DES_cfb_encrypt(in, out, 8, (long)inl,
187 EVP_CIPHER_CTX_get_cipher_data(ctx),
188 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
189 EVP_CIPHER_CTX_encrypting(ctx));
190 return 1;
191}
192
193BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64,
194 EVP_CIPH_RAND_KEY, des_init_key, NULL,
195 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
196
197 BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 1,
198 EVP_CIPH_RAND_KEY, des_init_key, NULL,
199 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
200
201 BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 8,
202 EVP_CIPH_RAND_KEY, des_init_key, NULL,
203 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
204
205static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
206 const unsigned char *iv, int enc)
207{
208 DES_cblock *deskey = (DES_cblock *)key;
209 EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx);
210
211 dat->stream.cbc = NULL;
212# if defined(SPARC_DES_CAPABLE)
213 if (SPARC_DES_CAPABLE) {
214 int mode = EVP_CIPHER_CTX_mode(ctx);
215
216 if (mode == EVP_CIPH_CBC_MODE) {
217 des_t4_key_expand(key, &dat->ks.ks);
218 dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt;
219 return 1;
220 }
221 }
222# endif
223 DES_set_key_unchecked(deskey, EVP_CIPHER_CTX_get_cipher_data(ctx));
224 return 1;
225}
226
227static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
228{
229
230 switch (type) {
231 case EVP_CTRL_RAND_KEY:
232 if (RAND_priv_bytes(ptr, 8) <= 0)
233 return 0;
234 DES_set_odd_parity((DES_cblock *)ptr);
235 return 1;
236
237 default:
238 return -1;
239 }
240}
241
242#endif
243