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source: vbox/trunk/src/libs/openssl-3.0.3/crypto/evp/e_des.c@ 96662

Last change on this file since 96662 was 94082, checked in by vboxsync, 3 years ago

libs/openssl-3.0.1: started applying and adjusting our OpenSSL changes to 3.0.1. bugref:10128
File size: 8.0 KB
Line 
1/*
2 * Copyright 1995-2021 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 <stdio.h>
17#include "internal/cryptlib.h"
18#ifndef OPENSSL_NO_DES
19# include <openssl/evp.h>
20# include <openssl/objects.h>
21# include "crypto/evp.h"
22# include <openssl/des.h>
23# include <openssl/rand.h>
24# include "evp_local.h"
25
26typedef struct {
27 union {
28 OSSL_UNION_ALIGN;
29 DES_key_schedule ks;
30 } ks;
31 union {
32 void (*cbc) (const void *, void *, size_t,
33 const DES_key_schedule *, unsigned char *);
34 } stream;
35} EVP_DES_KEY;
36
37# if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
38/* ----------^^^ this is not a typo, just a way to detect that
39 * assembler support was in general requested... */
40# include "crypto/sparc_arch.h"
41
42# define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
43
44void des_t4_key_expand(const void *key, DES_key_schedule *ks);
45void des_t4_cbc_encrypt(const void *inp, void *out, size_t len,
46 const DES_key_schedule *ks, unsigned char iv[8]);
47void des_t4_cbc_decrypt(const void *inp, void *out, size_t len,
48 const DES_key_schedule *ks, unsigned char iv[8]);
49# endif
50
51static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
52 const unsigned char *iv, int enc);
53static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
54
55/*
56 * Because of various casts and different names can't use
57 * IMPLEMENT_BLOCK_CIPHER
58 */
59
60static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
61 const unsigned char *in, size_t inl)
62{
63 BLOCK_CIPHER_ecb_loop()
64 DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i),
65 EVP_CIPHER_CTX_get_cipher_data(ctx),
66 EVP_CIPHER_CTX_is_encrypting(ctx));
67 return 1;
68}
69
70static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
71 const unsigned char *in, size_t inl)
72{
73 while (inl >= EVP_MAXCHUNK) {
74 int num = EVP_CIPHER_CTX_get_num(ctx);
75 DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
76 EVP_CIPHER_CTX_get_cipher_data(ctx),
77 (DES_cblock *)ctx->iv, &num);
78 EVP_CIPHER_CTX_set_num(ctx, num);
79 inl -= EVP_MAXCHUNK;
80 in += EVP_MAXCHUNK;
81 out += EVP_MAXCHUNK;
82 }
83 if (inl) {
84 int num = EVP_CIPHER_CTX_get_num(ctx);
85 DES_ofb64_encrypt(in, out, (long)inl,
86 EVP_CIPHER_CTX_get_cipher_data(ctx),
87 (DES_cblock *)ctx->iv, &num);
88 EVP_CIPHER_CTX_set_num(ctx, num);
89 }
90 return 1;
91}
92
93static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
94 const unsigned char *in, size_t inl)
95{
96 EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx);
97
98 if (dat->stream.cbc != NULL) {
99 (*dat->stream.cbc) (in, out, inl, &dat->ks.ks, ctx->iv);
100 return 1;
101 }
102 while (inl >= EVP_MAXCHUNK) {
103 DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK,
104 EVP_CIPHER_CTX_get_cipher_data(ctx),
105 (DES_cblock *)ctx->iv,
106 EVP_CIPHER_CTX_is_encrypting(ctx));
107 inl -= EVP_MAXCHUNK;
108 in += EVP_MAXCHUNK;
109 out += EVP_MAXCHUNK;
110 }
111 if (inl)
112 DES_ncbc_encrypt(in, out, (long)inl,
113 EVP_CIPHER_CTX_get_cipher_data(ctx),
114 (DES_cblock *)ctx->iv,
115 EVP_CIPHER_CTX_is_encrypting(ctx));
116 return 1;
117}
118
119static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
120 const unsigned char *in, size_t inl)
121{
122 while (inl >= EVP_MAXCHUNK) {
123 int num = EVP_CIPHER_CTX_get_num(ctx);
124 DES_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
125 EVP_CIPHER_CTX_get_cipher_data(ctx),
126 (DES_cblock *)ctx->iv, &num,
127 EVP_CIPHER_CTX_is_encrypting(ctx));
128 EVP_CIPHER_CTX_set_num(ctx, num);
129 inl -= EVP_MAXCHUNK;
130 in += EVP_MAXCHUNK;
131 out += EVP_MAXCHUNK;
132 }
133 if (inl) {
134 int num = EVP_CIPHER_CTX_get_num(ctx);
135 DES_cfb64_encrypt(in, out, (long)inl,
136 EVP_CIPHER_CTX_get_cipher_data(ctx),
137 (DES_cblock *)ctx->iv, &num,
138 EVP_CIPHER_CTX_is_encrypting(ctx));
139 EVP_CIPHER_CTX_set_num(ctx, num);
140 }
141 return 1;
142}
143
144/*
145 * Although we have a CFB-r implementation for DES, it doesn't pack the right
146 * way, so wrap it here
147 */
148static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
149 const unsigned char *in, size_t inl)
150{
151 size_t n, chunk = EVP_MAXCHUNK / 8;
152 unsigned char c[1], d[1];
153
154 if (inl < chunk)
155 chunk = inl;
156
157 while (inl && inl >= chunk) {
158 for (n = 0; n < chunk * 8; ++n) {
159 c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
160 DES_cfb_encrypt(c, d, 1, 1, EVP_CIPHER_CTX_get_cipher_data(ctx),
161 (DES_cblock *)ctx->iv,
162 EVP_CIPHER_CTX_is_encrypting(ctx));
163 out[n / 8] =
164 (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) |
165 ((d[0] & 0x80) >> (unsigned int)(n % 8));
166 }
167 inl -= chunk;
168 in += chunk;
169 out += chunk;
170 if (inl < chunk)
171 chunk = inl;
172 }
173
174 return 1;
175}
176
177static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
178 const unsigned char *in, size_t inl)
179{
180 while (inl >= EVP_MAXCHUNK) {
181 DES_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK,
182 EVP_CIPHER_CTX_get_cipher_data(ctx),
183 (DES_cblock *)ctx->iv,
184 EVP_CIPHER_CTX_is_encrypting(ctx));
185 inl -= EVP_MAXCHUNK;
186 in += EVP_MAXCHUNK;
187 out += EVP_MAXCHUNK;
188 }
189 if (inl)
190 DES_cfb_encrypt(in, out, 8, (long)inl,
191 EVP_CIPHER_CTX_get_cipher_data(ctx),
192 (DES_cblock *)ctx->iv,
193 EVP_CIPHER_CTX_is_encrypting(ctx));
194 return 1;
195}
196
197BLOCK_CIPHER_defs(des, EVP_DES_KEY, NID_des, 8, 8, 8, 64,
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, 1,
202 EVP_CIPH_RAND_KEY, des_init_key, NULL,
203 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
204
205 BLOCK_CIPHER_def_cfb(des, EVP_DES_KEY, NID_des, 8, 8, 8,
206 EVP_CIPH_RAND_KEY, des_init_key, NULL,
207 EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl)
208
209static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
210 const unsigned char *iv, int enc)
211{
212 DES_cblock *deskey = (DES_cblock *)key;
213 EVP_DES_KEY *dat = (EVP_DES_KEY *) EVP_CIPHER_CTX_get_cipher_data(ctx);
214
215 dat->stream.cbc = NULL;
216# if defined(SPARC_DES_CAPABLE)
217 if (SPARC_DES_CAPABLE) {
218 int mode = EVP_CIPHER_CTX_get_mode(ctx);
219
220 if (mode == EVP_CIPH_CBC_MODE) {
221 des_t4_key_expand(key, &dat->ks.ks);
222 dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt;
223 return 1;
224 }
225 }
226# endif
227 DES_set_key_unchecked(deskey, EVP_CIPHER_CTX_get_cipher_data(ctx));
228 return 1;
229}
230
231static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
232{
233
234 switch (type) {
235 case EVP_CTRL_RAND_KEY:
236 if (RAND_priv_bytes(ptr, 8) <= 0)
237 return 0;
238 DES_set_odd_parity((DES_cblock *)ptr);
239 return 1;
240
241 default:
242 return -1;
243 }
244}
245
246#endif
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