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# include "evp_local.h"
19
20typedef struct {
21 union {
22 OSSL_UNION_ALIGN;
23 DES_key_schedule ks[3];
24 } ks;
25 union {
26 void (*cbc) (const void *, void *, size_t,
27 const DES_key_schedule *, unsigned char *);
28 } stream;
29} DES_EDE_KEY;
30# define ks1 ks.ks[0]
31# define ks2 ks.ks[1]
32# define ks3 ks.ks[2]
33
34# if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__))
35/* ---------^^^ this is not a typo, just a way to detect that
36 * assembler support was in general requested... */
37# include "sparc_arch.h"
38
39extern unsigned int OPENSSL_sparcv9cap_P[];
40
41# define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES)
42
43void des_t4_key_expand(const void *key, DES_key_schedule *ks);
44void des_t4_ede3_cbc_encrypt(const void *inp, void *out, size_t len,
45 const DES_key_schedule ks[3], unsigned char iv[8]);
46void des_t4_ede3_cbc_decrypt(const void *inp, void *out, size_t len,
47 const DES_key_schedule ks[3], unsigned char iv[8]);
48# endif
49
50static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
51 const unsigned char *iv, int enc);
52
53static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
54 const unsigned char *iv, int enc);
55
56static int des3_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr);
57
58# define data(ctx) EVP_C_DATA(DES_EDE_KEY,ctx)
59
60/*
61 * Because of various casts and different args can't use
62 * IMPLEMENT_BLOCK_CIPHER
63 */
64
65static int des_ede_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
66 const unsigned char *in, size_t inl)
67{
68 BLOCK_CIPHER_ecb_loop()
69 DES_ecb3_encrypt((const_DES_cblock *)(in + i),
70 (DES_cblock *)(out + i),
71 &data(ctx)->ks1, &data(ctx)->ks2,
72 &data(ctx)->ks3, EVP_CIPHER_CTX_encrypting(ctx));
73 return 1;
74}
75
76static int des_ede_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
77 const unsigned char *in, size_t inl)
78{
79 while (inl >= EVP_MAXCHUNK) {
80 int num = EVP_CIPHER_CTX_num(ctx);
81 DES_ede3_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK,
82 &data(ctx)->ks1, &data(ctx)->ks2,
83 &data(ctx)->ks3,
84 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
85 &num);
86 EVP_CIPHER_CTX_set_num(ctx, num);
87 inl -= EVP_MAXCHUNK;
88 in += EVP_MAXCHUNK;
89 out += EVP_MAXCHUNK;
90 }
91 if (inl) {
92 int num = EVP_CIPHER_CTX_num(ctx);
93 DES_ede3_ofb64_encrypt(in, out, (long)inl,
94 &data(ctx)->ks1, &data(ctx)->ks2,
95 &data(ctx)->ks3,
96 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
97 &num);
98 EVP_CIPHER_CTX_set_num(ctx, num);
99 }
100 return 1;
101}
102
103static int des_ede_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
104 const unsigned char *in, size_t inl)
105{
106 DES_EDE_KEY *dat = data(ctx);
107
108 if (dat->stream.cbc != NULL) {
109 (*dat->stream.cbc) (in, out, inl, dat->ks.ks,
110 EVP_CIPHER_CTX_iv_noconst(ctx));
111 return 1;
112 }
113
114 while (inl >= EVP_MAXCHUNK) {
115 DES_ede3_cbc_encrypt(in, out, (long)EVP_MAXCHUNK,
116 &dat->ks1, &dat->ks2, &dat->ks3,
117 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
118 EVP_CIPHER_CTX_encrypting(ctx));
119 inl -= EVP_MAXCHUNK;
120 in += EVP_MAXCHUNK;
121 out += EVP_MAXCHUNK;
122 }
123 if (inl)
124 DES_ede3_cbc_encrypt(in, out, (long)inl,
125 &dat->ks1, &dat->ks2, &dat->ks3,
126 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
127 EVP_CIPHER_CTX_encrypting(ctx));
128 return 1;
129}
130
131static int des_ede_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
132 const unsigned char *in, size_t inl)
133{
134 while (inl >= EVP_MAXCHUNK) {
135 int num = EVP_CIPHER_CTX_num(ctx);
136 DES_ede3_cfb64_encrypt(in, out, (long)EVP_MAXCHUNK,
137 &data(ctx)->ks1, &data(ctx)->ks2,
138 &data(ctx)->ks3,
139 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
140 &num, EVP_CIPHER_CTX_encrypting(ctx));
141 EVP_CIPHER_CTX_set_num(ctx, num);
142 inl -= EVP_MAXCHUNK;
143 in += EVP_MAXCHUNK;
144 out += EVP_MAXCHUNK;
145 }
146 if (inl) {
147 int num = EVP_CIPHER_CTX_num(ctx);
148 DES_ede3_cfb64_encrypt(in, out, (long)inl,
149 &data(ctx)->ks1, &data(ctx)->ks2,
150 &data(ctx)->ks3,
151 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
152 &num, EVP_CIPHER_CTX_encrypting(ctx));
153 EVP_CIPHER_CTX_set_num(ctx, num);
154 }
155 return 1;
156}
157
158/*
159 * Although we have a CFB-r implementation for 3-DES, it doesn't pack the
160 * right way, so wrap it here
161 */
162static int des_ede3_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
163 const unsigned char *in, size_t inl)
164{
165 size_t n;
166 unsigned char c[1], d[1];
167
168 if (!EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
169 inl *= 8;
170 for (n = 0; n < inl; ++n) {
171 c[0] = (in[n / 8] & (1 << (7 - n % 8))) ? 0x80 : 0;
172 DES_ede3_cfb_encrypt(c, d, 1, 1,
173 &data(ctx)->ks1, &data(ctx)->ks2,
174 &data(ctx)->ks3,
175 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
176 EVP_CIPHER_CTX_encrypting(ctx));
177 out[n / 8] = (out[n / 8] & ~(0x80 >> (unsigned int)(n % 8)))
178 | ((d[0] & 0x80) >> (unsigned int)(n % 8));
179 }
180
181 return 1;
182}
183
184static int des_ede3_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
185 const unsigned char *in, size_t inl)
186{
187 while (inl >= EVP_MAXCHUNK) {
188 DES_ede3_cfb_encrypt(in, out, 8, (long)EVP_MAXCHUNK,
189 &data(ctx)->ks1, &data(ctx)->ks2,
190 &data(ctx)->ks3,
191 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
192 EVP_CIPHER_CTX_encrypting(ctx));
193 inl -= EVP_MAXCHUNK;
194 in += EVP_MAXCHUNK;
195 out += EVP_MAXCHUNK;
196 }
197 if (inl)
198 DES_ede3_cfb_encrypt(in, out, 8, (long)inl,
199 &data(ctx)->ks1, &data(ctx)->ks2,
200 &data(ctx)->ks3,
201 (DES_cblock *)EVP_CIPHER_CTX_iv_noconst(ctx),
202 EVP_CIPHER_CTX_encrypting(ctx));
203 return 1;
204}
205
206BLOCK_CIPHER_defs(des_ede, DES_EDE_KEY, NID_des_ede, 8, 16, 8, 64,
207 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
208 des_ede_init_key, NULL, NULL, NULL, des3_ctrl)
209# define des_ede3_cfb64_cipher des_ede_cfb64_cipher
210# define des_ede3_ofb_cipher des_ede_ofb_cipher
211# define des_ede3_cbc_cipher des_ede_cbc_cipher
212# define des_ede3_ecb_cipher des_ede_ecb_cipher
213 BLOCK_CIPHER_defs(des_ede3, DES_EDE_KEY, NID_des_ede3, 8, 24, 8, 64,
214 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
215 des_ede3_init_key, NULL, NULL, NULL, des3_ctrl)
216
217 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 1,
218 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
219 des_ede3_init_key, NULL, NULL, NULL, des3_ctrl)
220
221 BLOCK_CIPHER_def_cfb(des_ede3, DES_EDE_KEY, NID_des_ede3, 24, 8, 8,
222 EVP_CIPH_RAND_KEY | EVP_CIPH_FLAG_DEFAULT_ASN1,
223 des_ede3_init_key, NULL, NULL, NULL, des3_ctrl)
224
225static int des_ede_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
226 const unsigned char *iv, int enc)
227{
228 DES_cblock *deskey = (DES_cblock *)key;
229 DES_EDE_KEY *dat = data(ctx);
230
231 dat->stream.cbc = NULL;
232# if defined(SPARC_DES_CAPABLE)
233 if (SPARC_DES_CAPABLE) {
234 int mode = EVP_CIPHER_CTX_mode(ctx);
235
236 if (mode == EVP_CIPH_CBC_MODE) {
237 des_t4_key_expand(&deskey[0], &dat->ks1);
238 des_t4_key_expand(&deskey[1], &dat->ks2);
239 memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1));
240 dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt :
241 des_t4_ede3_cbc_decrypt;
242 return 1;
243 }
244 }
245# endif
246 DES_set_key_unchecked(&deskey[0], &dat->ks1);
247 DES_set_key_unchecked(&deskey[1], &dat->ks2);
248 memcpy(&dat->ks3, &dat->ks1, sizeof(dat->ks1));
249 return 1;
250}
251
252static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
253 const unsigned char *iv, int enc)
254{
255 DES_cblock *deskey = (DES_cblock *)key;
256 DES_EDE_KEY *dat = data(ctx);
257
258 dat->stream.cbc = NULL;
259# if defined(SPARC_DES_CAPABLE)
260 if (SPARC_DES_CAPABLE) {
261 int mode = EVP_CIPHER_CTX_mode(ctx);
262
263 if (mode == EVP_CIPH_CBC_MODE) {
264 des_t4_key_expand(&deskey[0], &dat->ks1);
265 des_t4_key_expand(&deskey[1], &dat->ks2);
266 des_t4_key_expand(&deskey[2], &dat->ks3);
267 dat->stream.cbc = enc ? des_t4_ede3_cbc_encrypt :
268 des_t4_ede3_cbc_decrypt;
269 return 1;
270 }
271 }
272# endif
273 DES_set_key_unchecked(&deskey[0], &dat->ks1);
274 DES_set_key_unchecked(&deskey[1], &dat->ks2);
275 DES_set_key_unchecked(&deskey[2], &dat->ks3);
276 return 1;
277}
278
279static int des3_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
280{
281
282 DES_cblock *deskey = ptr;
283 int kl;
284
285 switch (type) {
286 case EVP_CTRL_RAND_KEY:
287 kl = EVP_CIPHER_CTX_key_length(ctx);
288 if (kl < 0 || RAND_priv_bytes(ptr, kl) <= 0)
289 return 0;
290 DES_set_odd_parity(deskey);
291 if (kl >= 16)
292 DES_set_odd_parity(deskey + 1);
293 if (kl >= 24)
294 DES_set_odd_parity(deskey + 2);
295 return 1;
296
297 default:
298 return -1;
299 }
300}
301
302const EVP_CIPHER *EVP_des_ede(void)
303{
304 return &des_ede_ecb;
305}
306
307const EVP_CIPHER *EVP_des_ede3(void)
308{
309 return &des_ede3_ecb;
310}
311
312
313# include <openssl/sha.h>
314
315static const unsigned char wrap_iv[8] =
316 { 0x4a, 0xdd, 0xa2, 0x2c, 0x79, 0xe8, 0x21, 0x05 };
317
318static int des_ede3_unwrap(EVP_CIPHER_CTX *ctx, unsigned char *out,
319 const unsigned char *in, size_t inl)
320{
321 unsigned char icv[8], iv[8], sha1tmp[SHA_DIGEST_LENGTH];
322 int rv = -1;
323 if (inl < 24)
324 return -1;
325 if (out == NULL)
326 return inl - 16;
327 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), wrap_iv, 8);
328 /* Decrypt first block which will end up as icv */
329 des_ede_cbc_cipher(ctx, icv, in, 8);
330 /* Decrypt central blocks */
331 /*
332 * If decrypting in place move whole output along a block so the next
333 * des_ede_cbc_cipher is in place.
334 */
335 if (out == in) {
336 memmove(out, out + 8, inl - 8);
337 in -= 8;
338 }
339 des_ede_cbc_cipher(ctx, out, in + 8, inl - 16);
340 /* Decrypt final block which will be IV */
341 des_ede_cbc_cipher(ctx, iv, in + inl - 8, 8);
342 /* Reverse order of everything */
343 BUF_reverse(icv, NULL, 8);
344 BUF_reverse(out, NULL, inl - 16);
345 BUF_reverse(EVP_CIPHER_CTX_iv_noconst(ctx), iv, 8);
346 /* Decrypt again using new IV */
347 des_ede_cbc_cipher(ctx, out, out, inl - 16);
348 des_ede_cbc_cipher(ctx, icv, icv, 8);
349 /* Work out SHA1 hash of first portion */
350 SHA1(out, inl - 16, sha1tmp);
351
352 if (!CRYPTO_memcmp(sha1tmp, icv, 8))
353 rv = inl - 16;
354 OPENSSL_cleanse(icv, 8);
355 OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
356 OPENSSL_cleanse(iv, 8);
357 OPENSSL_cleanse(EVP_CIPHER_CTX_iv_noconst(ctx), 8);
358 if (rv == -1)
359 OPENSSL_cleanse(out, inl - 16);
360
361 return rv;
362}
363
364static int des_ede3_wrap(EVP_CIPHER_CTX *ctx, unsigned char *out,
365 const unsigned char *in, size_t inl)
366{
367 unsigned char sha1tmp[SHA_DIGEST_LENGTH];
368 if (out == NULL)
369 return inl + 16;
370 /* Copy input to output buffer + 8 so we have space for IV */
371 memmove(out + 8, in, inl);
372 /* Work out ICV */
373 SHA1(in, inl, sha1tmp);
374 memcpy(out + inl + 8, sha1tmp, 8);
375 OPENSSL_cleanse(sha1tmp, SHA_DIGEST_LENGTH);
376 /* Generate random IV */
377 if (RAND_bytes(EVP_CIPHER_CTX_iv_noconst(ctx), 8) <= 0)
378 return -1;
379 memcpy(out, EVP_CIPHER_CTX_iv_noconst(ctx), 8);
380 /* Encrypt everything after IV in place */
381 des_ede_cbc_cipher(ctx, out + 8, out + 8, inl + 8);
382 BUF_reverse(out, NULL, inl + 16);
383 memcpy(EVP_CIPHER_CTX_iv_noconst(ctx), wrap_iv, 8);
384 des_ede_cbc_cipher(ctx, out, out, inl + 16);
385 return inl + 16;
386}
387
388static int des_ede3_wrap_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
389 const unsigned char *in, size_t inl)
390{
391 /*
392 * Sanity check input length: we typically only wrap keys so EVP_MAXCHUNK
393 * is more than will ever be needed. Also input length must be a multiple
394 * of 8 bits.
395 */
396 if (inl >= EVP_MAXCHUNK || inl % 8)
397 return -1;
398
399 if (is_partially_overlapping(out, in, inl)) {
400 EVPerr(EVP_F_DES_EDE3_WRAP_CIPHER, EVP_R_PARTIALLY_OVERLAPPING);
401 return 0;
402 }
403
404 if (EVP_CIPHER_CTX_encrypting(ctx))
405 return des_ede3_wrap(ctx, out, in, inl);
406 else
407 return des_ede3_unwrap(ctx, out, in, inl);
408}
409
410static const EVP_CIPHER des3_wrap = {
411 NID_id_smime_alg_CMS3DESwrap,
412 8, 24, 0,
413 EVP_CIPH_WRAP_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
414 | EVP_CIPH_FLAG_DEFAULT_ASN1,
415 des_ede3_init_key, des_ede3_wrap_cipher,
416 NULL,
417 sizeof(DES_EDE_KEY),
418 NULL, NULL, NULL, NULL
419};
420
421const EVP_CIPHER *EVP_des_ede3_wrap(void)
422{
423 return &des3_wrap;
424}
425
426#endif
427