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1/* $OpenBSD: e_des3.c,v 1.30 2024/04/09 13:52:41 beck Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <limits.h>
60#include <stdio.h>
61#include <string.h>
62
63#include <openssl/opensslconf.h>
64
65#ifndef OPENSSL_NO_DES
66
67#include <openssl/des.h>
68#include <openssl/evp.h>
69#include <openssl/objects.h>
70
71#include "evp_local.h"
72
73typedef struct {
74 DES_key_schedule ks1;/* key schedule */
75 DES_key_schedule ks2;/* key schedule (for ede) */
76 DES_key_schedule ks3;/* key schedule (for ede3) */
77} DES_EDE_KEY;
78
79#define data(ctx) ((DES_EDE_KEY *)(ctx)->cipher_data)
80
81static int
82des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
83 const unsigned char *iv, int enc)
84{
85 DES_cblock *deskey = (DES_cblock *)key;
86
87 DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1);
88 DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2);
89 memcpy(&data(ctx)->ks3, &data(ctx)->ks1,
90 sizeof(data(ctx)->ks1));
91 return 1;
92}
93
94static int
95des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
96 const unsigned char *iv, int enc)
97{
98 DES_cblock *deskey = (DES_cblock *)key;
99
100
101 DES_set_key_unchecked(&deskey[0], &data(ctx)->ks1);
102 DES_set_key_unchecked(&deskey[1], &data(ctx)->ks2);
103 DES_set_key_unchecked(&deskey[2], &data(ctx)->ks3);
104 return 1;
105}
106
107static int
108des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
109{
110 DES_cblock *deskey = ptr;
111
112 switch (type) {
113 case EVP_CTRL_RAND_KEY:
114 if (DES_random_key(deskey) == 0)
115 return 0;
116 if (c->key_len >= 16 && DES_random_key(deskey + 1) == 0)
117 return 0;
118 if (c->key_len >= 24 && DES_random_key(deskey + 2) == 0)
119 return 0;
120 return 1;
121
122 default:
123 return -1;
124 }
125}
126
127static int
128des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
129 const unsigned char *in, size_t inl)
130{
131 size_t i, bl;
132
133 bl = ctx->cipher->block_size;
134
135 if (inl < bl)
136 return 1;
137
138 inl -= bl;
139
140 for (i = 0; i <= inl; i += bl)
141 DES_ecb3_encrypt((const_DES_cblock *)(in + i), (DES_cblock *)(out + i),
142 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3, ctx->encrypt);
143
144 return 1;
145}
146
147static int
148des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
149 const unsigned char *in, size_t inl)
150{
151 size_t chunk = LONG_MAX & ~0xff;
152
153 while (inl >= chunk) {
154 DES_ede3_ofb64_encrypt(in, out, (long)chunk,
155 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
156 (DES_cblock *)ctx->iv, &ctx->num);
157 inl -= chunk;
158 in += chunk;
159 out += chunk;
160 }
161 if (inl)
162 DES_ede3_ofb64_encrypt(in, out, (long)inl,
163 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
164 (DES_cblock *)ctx->iv, &ctx->num);
165
166 return 1;
167}
168
169static int
170des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
171 const unsigned char *in, size_t inl)
172{
173 size_t chunk = LONG_MAX & ~0xff;
174
175 while (inl >= chunk) {
176 DES_ede3_cbc_encrypt(in, out, (long)chunk,
177 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
178 (DES_cblock *)ctx->iv, ctx->encrypt);
179 inl -= chunk;
180 in += chunk;
181 out += chunk;
182 }
183 if (inl)
184 DES_ede3_cbc_encrypt(in, out, (long)inl,
185 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
186 (DES_cblock *)ctx->iv, ctx->encrypt);
187 return 1;
188}
189
190static int
191des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
192 const unsigned char *in, size_t inl)
193{
194 size_t chunk = LONG_MAX & ~0xff;
195
196 while (inl >= chunk) {
197 DES_ede3_cfb64_encrypt(in, out, (long)chunk,
198 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
199 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
200 inl -= chunk;
201 in += chunk;
202 out += chunk;
203 }
204 if (inl)
205 DES_ede3_cfb64_encrypt(in, out, (long)inl,
206 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
207 (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt);
208 return 1;
209}
210
211/* Although we have a CFB-r implementation for 3-DES, it doesn't pack the right
212 way, so wrap it here */
213static int
214des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
215 const unsigned char *in, size_t inl)
216{
217 unsigned char c[1], d[1];
218 size_t n;
219
220 if (!(ctx->flags & EVP_CIPH_FLAG_LENGTH_BITS))
221 inl *= 8;
222
223 for (n = 0; n < inl; ++n) {
224 c[0] = (in[n/8]&(1 << (7 - n % 8))) ? 0x80 : 0;
225 DES_ede3_cfb_encrypt(c, d, 1, 1,
226 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
227 (DES_cblock *)ctx->iv, ctx->encrypt);
228 out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8))) |
229 ((d[0] & 0x80) >> (unsigned int)(n % 8));
230 }
231
232 return 1;
233}
234
235static int
236des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
237 const unsigned char *in, size_t inl)
238{
239 size_t chunk = LONG_MAX & ~0xff;
240
241 while (inl >= chunk) {
242 DES_ede3_cfb_encrypt(in, out, 8, (long)chunk,
243 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
244 (DES_cblock *)ctx->iv, ctx->encrypt);
245 inl -= chunk;
246 in += chunk;
247 out += chunk;
248 }
249 if (inl)
250 DES_ede3_cfb_encrypt(in, out, 8, (long)inl,
251 &data(ctx)->ks1, &data(ctx)->ks2, &data(ctx)->ks3,
252 (DES_cblock *)ctx->iv, ctx->encrypt);
253 return 1;
254}
255
256static const EVP_CIPHER des_ede_cbc = {
257 .nid = NID_des_ede_cbc,
258 .block_size = 8,
259 .key_len = 16,
260 .iv_len = 8,
261 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_CBC_MODE,
262 .init = des_ede_init_key,
263 .do_cipher = des_ede_cbc_cipher,
264 .cleanup = NULL,
265 .ctx_size = sizeof(DES_EDE_KEY),
266 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
267 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
268 .ctrl = des3_ctrl,
269};
270
271const EVP_CIPHER *
272EVP_des_ede_cbc(void)
273{
274 return &des_ede_cbc;
275}
276LCRYPTO_ALIAS(EVP_des_ede_cbc);
277
278static const EVP_CIPHER des_ede_cfb64 = {
279 .nid = NID_des_ede_cfb64,
280 .block_size = 1,
281 .key_len = 16,
282 .iv_len = 8,
283 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_CFB_MODE,
284 .init = des_ede_init_key,
285 .do_cipher = des_ede_cfb64_cipher,
286 .cleanup = NULL,
287 .ctx_size = sizeof(DES_EDE_KEY),
288 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
289 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
290 .ctrl = des3_ctrl,
291};
292
293const EVP_CIPHER *
294EVP_des_ede_cfb64(void)
295{
296 return &des_ede_cfb64;
297}
298LCRYPTO_ALIAS(EVP_des_ede_cfb64);
299
300static const EVP_CIPHER des_ede_ofb = {
301 .nid = NID_des_ede_ofb64,
302 .block_size = 1,
303 .key_len = 16,
304 .iv_len = 8,
305 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_OFB_MODE,
306 .init = des_ede_init_key,
307 .do_cipher = des_ede_ofb_cipher,
308 .cleanup = NULL,
309 .ctx_size = sizeof(DES_EDE_KEY),
310 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
311 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
312 .ctrl = des3_ctrl,
313};
314
315const EVP_CIPHER *
316EVP_des_ede_ofb(void)
317{
318 return &des_ede_ofb;
319}
320LCRYPTO_ALIAS(EVP_des_ede_ofb);
321
322static const EVP_CIPHER des_ede_ecb = {
323 .nid = NID_des_ede_ecb,
324 .block_size = 8,
325 .key_len = 16,
326 .iv_len = 0,
327 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_ECB_MODE,
328 .init = des_ede_init_key,
329 .do_cipher = des_ede_ecb_cipher,
330 .cleanup = NULL,
331 .ctx_size = sizeof(DES_EDE_KEY),
332 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
333 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
334 .ctrl = des3_ctrl,
335};
336
337const EVP_CIPHER *
338EVP_des_ede_ecb(void)
339{
340 return &des_ede_ecb;
341}
342LCRYPTO_ALIAS(EVP_des_ede_ecb);
343
344
345#define des_ede3_cfb64_cipher des_ede_cfb64_cipher
346#define des_ede3_ofb_cipher des_ede_ofb_cipher
347#define des_ede3_cbc_cipher des_ede_cbc_cipher
348#define des_ede3_ecb_cipher des_ede_ecb_cipher
349
350static const EVP_CIPHER des_ede3_cbc = {
351 .nid = NID_des_ede3_cbc,
352 .block_size = 8,
353 .key_len = 24,
354 .iv_len = 8,
355 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_CBC_MODE,
356 .init = des_ede3_init_key,
357 .do_cipher = des_ede3_cbc_cipher,
358 .cleanup = NULL,
359 .ctx_size = sizeof(DES_EDE_KEY),
360 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
361 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
362 .ctrl = des3_ctrl,
363};
364
365const EVP_CIPHER *
366EVP_des_ede3_cbc(void)
367{
368 return &des_ede3_cbc;
369}
370LCRYPTO_ALIAS(EVP_des_ede3_cbc);
371
372static const EVP_CIPHER des_ede3_cfb64 = {
373 .nid = NID_des_ede3_cfb64,
374 .block_size = 1,
375 .key_len = 24,
376 .iv_len = 8,
377 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_CFB_MODE,
378 .init = des_ede3_init_key,
379 .do_cipher = des_ede3_cfb64_cipher,
380 .cleanup = NULL,
381 .ctx_size = sizeof(DES_EDE_KEY),
382 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
383 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
384 .ctrl = des3_ctrl,
385};
386
387const EVP_CIPHER *
388EVP_des_ede3_cfb64(void)
389{
390 return &des_ede3_cfb64;
391}
392LCRYPTO_ALIAS(EVP_des_ede3_cfb64);
393
394static const EVP_CIPHER des_ede3_ofb = {
395 .nid = NID_des_ede3_ofb64,
396 .block_size = 1,
397 .key_len = 24,
398 .iv_len = 8,
399 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_OFB_MODE,
400 .init = des_ede3_init_key,
401 .do_cipher = des_ede3_ofb_cipher,
402 .cleanup = NULL,
403 .ctx_size = sizeof(DES_EDE_KEY),
404 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
405 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
406 .ctrl = des3_ctrl,
407};
408
409const EVP_CIPHER *
410EVP_des_ede3_ofb(void)
411{
412 return &des_ede3_ofb;
413}
414LCRYPTO_ALIAS(EVP_des_ede3_ofb);
415
416static const EVP_CIPHER des_ede3_ecb = {
417 .nid = NID_des_ede3_ecb,
418 .block_size = 8,
419 .key_len = 24,
420 .iv_len = 0,
421 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_ECB_MODE,
422 .init = des_ede3_init_key,
423 .do_cipher = des_ede3_ecb_cipher,
424 .cleanup = NULL,
425 .ctx_size = sizeof(DES_EDE_KEY),
426 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
427 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
428 .ctrl = des3_ctrl,
429};
430
431const EVP_CIPHER *
432EVP_des_ede3_ecb(void)
433{
434 return &des_ede3_ecb;
435}
436LCRYPTO_ALIAS(EVP_des_ede3_ecb);
437
438
439static const EVP_CIPHER des_ede3_cfb1 = {
440 .nid = NID_des_ede3_cfb1,
441 .block_size = 1,
442 .key_len = 24,
443 .iv_len = 8,
444 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_CFB_MODE,
445 .init = des_ede3_init_key,
446 .do_cipher = des_ede3_cfb1_cipher,
447 .cleanup = NULL,
448 .ctx_size = sizeof(DES_EDE_KEY),
449 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
450 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
451 .ctrl = des3_ctrl,
452};
453
454const EVP_CIPHER *
455EVP_des_ede3_cfb1(void)
456{
457 return &des_ede3_cfb1;
458}
459LCRYPTO_ALIAS(EVP_des_ede3_cfb1);
460
461
462static const EVP_CIPHER des_ede3_cfb8 = {
463 .nid = NID_des_ede3_cfb8,
464 .block_size = 1,
465 .key_len = 24,
466 .iv_len = 8,
467 .flags = EVP_CIPH_RAND_KEY | EVP_CIPH_CFB_MODE,
468 .init = des_ede3_init_key,
469 .do_cipher = des_ede3_cfb8_cipher,
470 .cleanup = NULL,
471 .ctx_size = sizeof(DES_EDE_KEY),
472 .set_asn1_parameters = EVP_CIPHER_set_asn1_iv,
473 .get_asn1_parameters = EVP_CIPHER_get_asn1_iv,
474 .ctrl = des3_ctrl,
475};
476
477const EVP_CIPHER *
478EVP_des_ede3_cfb8(void)
479{
480 return &des_ede3_cfb8;
481}
482LCRYPTO_ALIAS(EVP_des_ede3_cfb8);
483
484const EVP_CIPHER *
485EVP_des_ede(void)
486{
487 return &des_ede_ecb;
488}
489LCRYPTO_ALIAS(EVP_des_ede);
490
491const EVP_CIPHER *
492EVP_des_ede3(void)
493{
494 return &des_ede3_ecb;
495}
496LCRYPTO_ALIAS(EVP_des_ede3);
497#endif
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