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 <assert.h>
12#include "internal/cryptlib.h"
13#include <openssl/evp.h>
14#include <openssl/err.h>
15#include <openssl/rand.h>
16#include <openssl/rand_drbg.h>
17#include <openssl/engine.h>
18#include <openssl/params.h>
19#include <openssl/core_names.h>
20#include "crypto/evp.h"
21#include "internal/provider.h"
22#include "evp_local.h"
23
24int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx)
25{
26 if (ctx == NULL)
27 return 1;
28
29 if (ctx->cipher == NULL || ctx->cipher->prov == NULL)
30 goto legacy;
31
32 if (ctx->provctx != NULL) {
33 if (ctx->cipher->freectx != NULL)
34 ctx->cipher->freectx(ctx->provctx);
35 ctx->provctx = NULL;
36 }
37 if (ctx->fetched_cipher != NULL)
38 EVP_CIPHER_free(ctx->fetched_cipher);
39 memset(ctx, 0, sizeof(*ctx));
40
41 return 1;
42
43 /* TODO(3.0): Remove legacy code below */
44 legacy:
45
46 if (ctx->cipher != NULL) {
47 if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx))
48 return 0;
49 /* Cleanse cipher context data */
50 if (ctx->cipher_data && ctx->cipher->ctx_size)
51 OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size);
52 }
53 OPENSSL_free(ctx->cipher_data);
54#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
55 ENGINE_finish(ctx->engine);
56#endif
57 memset(ctx, 0, sizeof(*ctx));
58 return 1;
59}
60
61EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
62{
63 return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX));
64}
65
66void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
67{
68 EVP_CIPHER_CTX_reset(ctx);
69 OPENSSL_free(ctx);
70}
71
72int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
73 const unsigned char *key, const unsigned char *iv, int enc)
74{
75 if (cipher != NULL)
76 EVP_CIPHER_CTX_reset(ctx);
77 return EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, enc);
78}
79
80int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
81 ENGINE *impl, const unsigned char *key,
82 const unsigned char *iv, int enc)
83{
84#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
85 ENGINE *tmpimpl = NULL;
86#endif
87 const EVP_CIPHER *tmpcipher;
88
89 /*
90 * enc == 1 means we are encrypting.
91 * enc == 0 means we are decrypting.
92 * enc == -1 means, use the previously initialised value for encrypt/decrypt
93 */
94 if (enc == -1) {
95 enc = ctx->encrypt;
96 } else {
97 if (enc)
98 enc = 1;
99 ctx->encrypt = enc;
100 }
101
102 if (cipher == NULL && ctx->cipher == NULL) {
103 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET);
104 return 0;
105 }
106
107 /* TODO(3.0): Legacy work around code below. Remove this */
108
109#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
110 /*
111 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
112 * this context may already have an ENGINE! Try to avoid releasing the
113 * previous handle, re-querying for an ENGINE, and having a
114 * reinitialisation, when it may all be unnecessary.
115 */
116 if (ctx->engine && ctx->cipher
117 && (cipher == NULL || cipher->nid == ctx->cipher->nid))
118 goto skip_to_init;
119
120 if (cipher != NULL && impl == NULL) {
121 /* Ask if an ENGINE is reserved for this job */
122 tmpimpl = ENGINE_get_cipher_engine(cipher->nid);
123 }
124#endif
125
126 /*
127 * If there are engines involved then we should use legacy handling for now.
128 */
129 if (ctx->engine != NULL
130#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
131 || tmpimpl != NULL
132#endif
133 || impl != NULL) {
134 if (ctx->cipher == ctx->fetched_cipher)
135 ctx->cipher = NULL;
136 EVP_CIPHER_free(ctx->fetched_cipher);
137 ctx->fetched_cipher = NULL;
138 goto legacy;
139 }
140
141 tmpcipher = (cipher == NULL) ? ctx->cipher : cipher;
142
143 if (tmpcipher->prov == NULL) {
144 switch(tmpcipher->nid) {
145 case NID_aes_256_ecb:
146 case NID_aes_192_ecb:
147 case NID_aes_128_ecb:
148 case NID_aes_256_cbc:
149 case NID_aes_192_cbc:
150 case NID_aes_128_cbc:
151 case NID_aes_256_ofb128:
152 case NID_aes_192_ofb128:
153 case NID_aes_128_ofb128:
154 case NID_aes_256_cfb128:
155 case NID_aes_192_cfb128:
156 case NID_aes_128_cfb128:
157 case NID_aes_256_cfb1:
158 case NID_aes_192_cfb1:
159 case NID_aes_128_cfb1:
160 case NID_aes_256_cfb8:
161 case NID_aes_192_cfb8:
162 case NID_aes_128_cfb8:
163 case NID_aes_256_ctr:
164 case NID_aes_192_ctr:
165 case NID_aes_128_ctr:
166 case NID_aes_128_xts:
167 case NID_aes_256_xts:
168 case NID_aes_256_ocb:
169 case NID_aes_192_ocb:
170 case NID_aes_128_ocb:
171 case NID_aes_256_gcm:
172 case NID_aes_192_gcm:
173 case NID_aes_128_gcm:
174 case NID_aes_256_siv:
175 case NID_aes_192_siv:
176 case NID_aes_128_siv:
177 case NID_id_aes256_wrap:
178 case NID_id_aes256_wrap_pad:
179 case NID_id_aes192_wrap:
180 case NID_id_aes192_wrap_pad:
181 case NID_id_aes128_wrap:
182 case NID_id_aes128_wrap_pad:
183 case NID_aria_256_gcm:
184 case NID_aria_192_gcm:
185 case NID_aria_128_gcm:
186 case NID_aes_256_ccm:
187 case NID_aes_192_ccm:
188 case NID_aes_128_ccm:
189 case NID_aria_256_ccm:
190 case NID_aria_192_ccm:
191 case NID_aria_128_ccm:
192 case NID_aria_256_ecb:
193 case NID_aria_192_ecb:
194 case NID_aria_128_ecb:
195 case NID_aria_256_cbc:
196 case NID_aria_192_cbc:
197 case NID_aria_128_cbc:
198 case NID_aria_256_ofb128:
199 case NID_aria_192_ofb128:
200 case NID_aria_128_ofb128:
201 case NID_aria_256_cfb128:
202 case NID_aria_192_cfb128:
203 case NID_aria_128_cfb128:
204 case NID_aria_256_cfb1:
205 case NID_aria_192_cfb1:
206 case NID_aria_128_cfb1:
207 case NID_aria_256_cfb8:
208 case NID_aria_192_cfb8:
209 case NID_aria_128_cfb8:
210 case NID_aria_256_ctr:
211 case NID_aria_192_ctr:
212 case NID_aria_128_ctr:
213 case NID_camellia_256_ecb:
214 case NID_camellia_192_ecb:
215 case NID_camellia_128_ecb:
216 case NID_camellia_256_cbc:
217 case NID_camellia_192_cbc:
218 case NID_camellia_128_cbc:
219 case NID_camellia_256_ofb128:
220 case NID_camellia_192_ofb128:
221 case NID_camellia_128_ofb128:
222 case NID_camellia_256_cfb128:
223 case NID_camellia_192_cfb128:
224 case NID_camellia_128_cfb128:
225 case NID_camellia_256_cfb1:
226 case NID_camellia_192_cfb1:
227 case NID_camellia_128_cfb1:
228 case NID_camellia_256_cfb8:
229 case NID_camellia_192_cfb8:
230 case NID_camellia_128_cfb8:
231 case NID_camellia_256_ctr:
232 case NID_camellia_192_ctr:
233 case NID_camellia_128_ctr:
234 case NID_des_ede3_cbc:
235 case NID_des_ede3_ecb:
236 case NID_des_ede3_ofb64:
237 case NID_des_ede3_cfb64:
238 case NID_des_ede3_cfb8:
239 case NID_des_ede3_cfb1:
240 case NID_des_ede_cbc:
241 case NID_des_ede_ecb:
242 case NID_des_ede_ofb64:
243 case NID_des_ede_cfb64:
244 case NID_desx_cbc:
245 case NID_des_cbc:
246 case NID_des_ecb:
247 case NID_des_cfb1:
248 case NID_des_cfb8:
249 case NID_des_cfb64:
250 case NID_des_ofb64:
251 case NID_id_smime_alg_CMS3DESwrap:
252 case NID_bf_cbc:
253 case NID_bf_ecb:
254 case NID_bf_cfb64:
255 case NID_bf_ofb64:
256 case NID_idea_cbc:
257 case NID_idea_ecb:
258 case NID_idea_cfb64:
259 case NID_idea_ofb64:
260 case NID_cast5_cbc:
261 case NID_cast5_ecb:
262 case NID_cast5_cfb64:
263 case NID_cast5_ofb64:
264 case NID_seed_cbc:
265 case NID_seed_ecb:
266 case NID_seed_cfb128:
267 case NID_seed_ofb128:
268 case NID_sm4_cbc:
269 case NID_sm4_ecb:
270 case NID_sm4_ctr:
271 case NID_sm4_cfb128:
272 case NID_sm4_ofb128:
273 case NID_rc4:
274 case NID_rc4_40:
275 case NID_rc5_cbc:
276 case NID_rc5_ecb:
277 case NID_rc5_cfb64:
278 case NID_rc5_ofb64:
279 case NID_rc2_cbc:
280 case NID_rc2_40_cbc:
281 case NID_rc2_64_cbc:
282 case NID_rc2_cfb64:
283 case NID_rc2_ofb64:
284 case NID_chacha20:
285 case NID_chacha20_poly1305:
286 case NID_rc4_hmac_md5:
287 break;
288 default:
289 goto legacy;
290 }
291 }
292
293 /*
294 * Ensure a context left lying around from last time is cleared
295 * (legacy code)
296 */
297 if (cipher != NULL && ctx->cipher != NULL) {
298 OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size);
299 ctx->cipher_data = NULL;
300 }
301
302
303 /* TODO(3.0): Start of non-legacy code below */
304
305 /* Ensure a context left lying around from last time is cleared */
306 if (cipher != NULL && ctx->cipher != NULL) {
307 unsigned long flags = ctx->flags;
308
309 EVP_CIPHER_CTX_reset(ctx);
310 /* Restore encrypt and flags */
311 ctx->encrypt = enc;
312 ctx->flags = flags;
313 }
314
315 if (cipher == NULL)
316 cipher = ctx->cipher;
317
318 if (cipher->prov == NULL) {
319#ifdef FIPS_MODE
320 /* We only do explicit fetches inside the FIPS module */
321 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
322 return 0;
323#else
324 EVP_CIPHER *provciph =
325 EVP_CIPHER_fetch(NULL, OBJ_nid2sn(cipher->nid), "");
326
327 if (provciph == NULL) {
328 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
329 return 0;
330 }
331 cipher = provciph;
332 EVP_CIPHER_free(ctx->fetched_cipher);
333 ctx->fetched_cipher = provciph;
334#endif
335 }
336
337 ctx->cipher = cipher;
338 if (ctx->provctx == NULL) {
339 ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov));
340 if (ctx->provctx == NULL) {
341 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
342 return 0;
343 }
344 }
345
346 if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) {
347 /*
348 * If this ctx was already set up for no padding then we need to tell
349 * the new cipher about it.
350 */
351 if (!EVP_CIPHER_CTX_set_padding(ctx, 0))
352 return 0;
353 }
354
355 if (enc) {
356 if (ctx->cipher->einit == NULL) {
357 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
358 return 0;
359 }
360
361 return ctx->cipher->einit(ctx->provctx,
362 key,
363 key == NULL ? 0
364 : EVP_CIPHER_CTX_key_length(ctx),
365 iv,
366 iv == NULL ? 0
367 : EVP_CIPHER_CTX_iv_length(ctx));
368 }
369
370 if (ctx->cipher->dinit == NULL) {
371 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
372 return 0;
373 }
374
375 return ctx->cipher->dinit(ctx->provctx,
376 key,
377 key == NULL ? 0
378 : EVP_CIPHER_CTX_key_length(ctx),
379 iv,
380 iv == NULL ? 0
381 : EVP_CIPHER_CTX_iv_length(ctx));
382
383 /* TODO(3.0): Remove legacy code below */
384 legacy:
385
386 if (cipher != NULL) {
387 /*
388 * Ensure a context left lying around from last time is cleared (we
389 * previously attempted to avoid this if the same ENGINE and
390 * EVP_CIPHER could be used).
391 */
392 if (ctx->cipher) {
393 unsigned long flags = ctx->flags;
394 EVP_CIPHER_CTX_reset(ctx);
395 /* Restore encrypt and flags */
396 ctx->encrypt = enc;
397 ctx->flags = flags;
398 }
399#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
400 if (impl != NULL) {
401 if (!ENGINE_init(impl)) {
402 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
403 return 0;
404 }
405 } else {
406 impl = tmpimpl;
407 }
408 if (impl != NULL) {
409 /* There's an ENGINE for this job ... (apparently) */
410 const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
411
412 if (c == NULL) {
413 /*
414 * One positive side-effect of US's export control history,
415 * is that we should at least be able to avoid using US
416 * misspellings of "initialisation"?
417 */
418 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
419 return 0;
420 }
421 /* We'll use the ENGINE's private cipher definition */
422 cipher = c;
423 /*
424 * Store the ENGINE functional reference so we know 'cipher' came
425 * from an ENGINE and we need to release it when done.
426 */
427 ctx->engine = impl;
428 } else {
429 ctx->engine = NULL;
430 }
431#endif
432
433 ctx->cipher = cipher;
434 if (ctx->cipher->ctx_size) {
435 ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
436 if (ctx->cipher_data == NULL) {
437 ctx->cipher = NULL;
438 EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE);
439 return 0;
440 }
441 } else {
442 ctx->cipher_data = NULL;
443 }
444 ctx->key_len = cipher->key_len;
445 /* Preserve wrap enable flag, zero everything else */
446 ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
447 if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
448 if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
449 ctx->cipher = NULL;
450 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
451 return 0;
452 }
453 }
454 }
455#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
456 skip_to_init:
457#endif
458 if (ctx->cipher == NULL)
459 return 0;
460
461 /* we assume block size is a power of 2 in *cryptUpdate */
462 OPENSSL_assert(ctx->cipher->block_size == 1
463 || ctx->cipher->block_size == 8
464 || ctx->cipher->block_size == 16);
465
466 if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
467 && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) {
468 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED);
469 return 0;
470 }
471
472 if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) {
473 switch (EVP_CIPHER_CTX_mode(ctx)) {
474
475 case EVP_CIPH_STREAM_CIPHER:
476 case EVP_CIPH_ECB_MODE:
477 break;
478
479 case EVP_CIPH_CFB_MODE:
480 case EVP_CIPH_OFB_MODE:
481
482 ctx->num = 0;
483 /* fall-through */
484
485 case EVP_CIPH_CBC_MODE:
486
487 OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <=
488 (int)sizeof(ctx->iv));
489 if (iv)
490 memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
491 memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
492 break;
493
494 case EVP_CIPH_CTR_MODE:
495 ctx->num = 0;
496 /* Don't reuse IV for CTR mode */
497 if (iv)
498 memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx));
499 break;
500
501 default:
502 return 0;
503 }
504 }
505
506 if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
507 if (!ctx->cipher->init(ctx, key, iv, enc))
508 return 0;
509 }
510 ctx->buf_len = 0;
511 ctx->final_used = 0;
512 ctx->block_mask = ctx->cipher->block_size - 1;
513 return 1;
514}
515
516int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
517 const unsigned char *in, int inl)
518{
519 if (ctx->encrypt)
520 return EVP_EncryptUpdate(ctx, out, outl, in, inl);
521 else
522 return EVP_DecryptUpdate(ctx, out, outl, in, inl);
523}
524
525int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
526{
527 if (ctx->encrypt)
528 return EVP_EncryptFinal_ex(ctx, out, outl);
529 else
530 return EVP_DecryptFinal_ex(ctx, out, outl);
531}
532
533int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
534{
535 if (ctx->encrypt)
536 return EVP_EncryptFinal(ctx, out, outl);
537 else
538 return EVP_DecryptFinal(ctx, out, outl);
539}
540
541int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
542 const unsigned char *key, const unsigned char *iv)
543{
544 return EVP_CipherInit(ctx, cipher, key, iv, 1);
545}
546
547int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
548 ENGINE *impl, const unsigned char *key,
549 const unsigned char *iv)
550{
551 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
552}
553
554int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
555 const unsigned char *key, const unsigned char *iv)
556{
557 return EVP_CipherInit(ctx, cipher, key, iv, 0);
558}
559
560int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
561 ENGINE *impl, const unsigned char *key,
562 const unsigned char *iv)
563{
564 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
565}
566
567/*
568 * According to the letter of standard difference between pointers
569 * is specified to be valid only within same object. This makes
570 * it formally challenging to determine if input and output buffers
571 * are not partially overlapping with standard pointer arithmetic.
572 */
573#ifdef PTRDIFF_T
574# undef PTRDIFF_T
575#endif
576#if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64
577/*
578 * Then we have VMS that distinguishes itself by adhering to
579 * sizeof(size_t)==4 even in 64-bit builds, which means that
580 * difference between two pointers might be truncated to 32 bits.
581 * In the context one can even wonder how comparison for
582 * equality is implemented. To be on the safe side we adhere to
583 * PTRDIFF_T even for comparison for equality.
584 */
585# define PTRDIFF_T uint64_t
586#else
587# define PTRDIFF_T size_t
588#endif
589
590int is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
591{
592 PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2;
593 /*
594 * Check for partially overlapping buffers. [Binary logical
595 * operations are used instead of boolean to minimize number
596 * of conditional branches.]
597 */
598 int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) |
599 (diff > (0 - (PTRDIFF_T)len)));
600
601 return overlapped;
602}
603
604static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
605 unsigned char *out, int *outl,
606 const unsigned char *in, int inl)
607{
608 int i, j, bl, cmpl = inl;
609
610 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
611 cmpl = (cmpl + 7) / 8;
612
613 bl = ctx->cipher->block_size;
614
615 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
616 /* If block size > 1 then the cipher will have to do this check */
617 if (bl == 1 && is_partially_overlapping(out, in, cmpl)) {
618 EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
619 return 0;
620 }
621
622 i = ctx->cipher->do_cipher(ctx, out, in, inl);
623 if (i < 0)
624 return 0;
625 else
626 *outl = i;
627 return 1;
628 }
629
630 if (inl <= 0) {
631 *outl = 0;
632 return inl == 0;
633 }
634 if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
635 EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
636 return 0;
637 }
638
639 if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) {
640 if (ctx->cipher->do_cipher(ctx, out, in, inl)) {
641 *outl = inl;
642 return 1;
643 } else {
644 *outl = 0;
645 return 0;
646 }
647 }
648 i = ctx->buf_len;
649 OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
650 if (i != 0) {
651 if (bl - i > inl) {
652 memcpy(&(ctx->buf[i]), in, inl);
653 ctx->buf_len += inl;
654 *outl = 0;
655 return 1;
656 } else {
657 j = bl - i;
658 memcpy(&(ctx->buf[i]), in, j);
659 inl -= j;
660 in += j;
661 if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
662 return 0;
663 out += bl;
664 *outl = bl;
665 }
666 } else
667 *outl = 0;
668 i = inl & (bl - 1);
669 inl -= i;
670 if (inl > 0) {
671 if (!ctx->cipher->do_cipher(ctx, out, in, inl))
672 return 0;
673 *outl += inl;
674 }
675
676 if (i != 0)
677 memcpy(ctx->buf, &(in[inl]), i);
678 ctx->buf_len = i;
679 return 1;
680}
681
682
683int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
684 const unsigned char *in, int inl)
685{
686 int ret;
687 size_t soutl;
688 int blocksize;
689
690 /* Prevent accidental use of decryption context when encrypting */
691 if (!ctx->encrypt) {
692 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION);
693 return 0;
694 }
695
696 if (ctx->cipher == NULL) {
697 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_NO_CIPHER_SET);
698 return 0;
699 }
700
701 if (ctx->cipher->prov == NULL)
702 goto legacy;
703
704 blocksize = EVP_CIPHER_CTX_block_size(ctx);
705
706 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
707 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR);
708 return 0;
709 }
710 ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl,
711 inl + (blocksize == 1 ? 0 : blocksize), in,
712 (size_t)inl);
713
714 if (ret) {
715 if (soutl > INT_MAX) {
716 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR);
717 return 0;
718 }
719 *outl = soutl;
720 }
721
722 return ret;
723
724 /* TODO(3.0): Remove legacy code below */
725 legacy:
726
727 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
728}
729
730int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
731{
732 int ret;
733 ret = EVP_EncryptFinal_ex(ctx, out, outl);
734 return ret;
735}
736
737int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
738{
739 int n, ret;
740 unsigned int i, b, bl;
741 size_t soutl;
742 int blocksize;
743
744 /* Prevent accidental use of decryption context when encrypting */
745 if (!ctx->encrypt) {
746 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION);
747 return 0;
748 }
749
750 if (ctx->cipher == NULL) {
751 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_NO_CIPHER_SET);
752 return 0;
753 }
754 if (ctx->cipher->prov == NULL)
755 goto legacy;
756
757 blocksize = EVP_CIPHER_CTX_block_size(ctx);
758
759 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
760 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR);
761 return 0;
762 }
763
764 ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl,
765 blocksize == 1 ? 0 : blocksize);
766
767 if (ret) {
768 if (soutl > INT_MAX) {
769 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR);
770 return 0;
771 }
772 *outl = soutl;
773 }
774
775 return ret;
776
777 /* TODO(3.0): Remove legacy code below */
778 legacy:
779
780 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
781 ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
782 if (ret < 0)
783 return 0;
784 else
785 *outl = ret;
786 return 1;
787 }
788
789 b = ctx->cipher->block_size;
790 OPENSSL_assert(b <= sizeof(ctx->buf));
791 if (b == 1) {
792 *outl = 0;
793 return 1;
794 }
795 bl = ctx->buf_len;
796 if (ctx->flags & EVP_CIPH_NO_PADDING) {
797 if (bl) {
798 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX,
799 EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
800 return 0;
801 }
802 *outl = 0;
803 return 1;
804 }
805
806 n = b - bl;
807 for (i = bl; i < b; i++)
808 ctx->buf[i] = n;
809 ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b);
810
811 if (ret)
812 *outl = b;
813
814 return ret;
815}
816
817int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
818 const unsigned char *in, int inl)
819{
820 int fix_len, cmpl = inl, ret;
821 unsigned int b;
822 size_t soutl;
823 int blocksize;
824
825 /* Prevent accidental use of encryption context when decrypting */
826 if (ctx->encrypt) {
827 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION);
828 return 0;
829 }
830
831 if (ctx->cipher == NULL) {
832 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_NO_CIPHER_SET);
833 return 0;
834 }
835 if (ctx->cipher->prov == NULL)
836 goto legacy;
837
838 blocksize = EVP_CIPHER_CTX_block_size(ctx);
839
840 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
841 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR);
842 return 0;
843 }
844 ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl,
845 inl + (blocksize == 1 ? 0 : blocksize), in,
846 (size_t)inl);
847
848 if (ret) {
849 if (soutl > INT_MAX) {
850 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR);
851 return 0;
852 }
853 *outl = soutl;
854 }
855
856 return ret;
857
858 /* TODO(3.0): Remove legacy code below */
859 legacy:
860
861 b = ctx->cipher->block_size;
862
863 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
864 cmpl = (cmpl + 7) / 8;
865
866 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
867 if (b == 1 && is_partially_overlapping(out, in, cmpl)) {
868 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
869 return 0;
870 }
871
872 fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
873 if (fix_len < 0) {
874 *outl = 0;
875 return 0;
876 } else
877 *outl = fix_len;
878 return 1;
879 }
880
881 if (inl <= 0) {
882 *outl = 0;
883 return inl == 0;
884 }
885
886 if (ctx->flags & EVP_CIPH_NO_PADDING)
887 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
888
889 OPENSSL_assert(b <= sizeof(ctx->final));
890
891 if (ctx->final_used) {
892 /* see comment about PTRDIFF_T comparison above */
893 if (((PTRDIFF_T)out == (PTRDIFF_T)in)
894 || is_partially_overlapping(out, in, b)) {
895 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
896 return 0;
897 }
898 memcpy(out, ctx->final, b);
899 out += b;
900 fix_len = 1;
901 } else
902 fix_len = 0;
903
904 if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl))
905 return 0;
906
907 /*
908 * if we have 'decrypted' a multiple of block size, make sure we have a
909 * copy of this last block
910 */
911 if (b > 1 && !ctx->buf_len) {
912 *outl -= b;
913 ctx->final_used = 1;
914 memcpy(ctx->final, &out[*outl], b);
915 } else
916 ctx->final_used = 0;
917
918 if (fix_len)
919 *outl += b;
920
921 return 1;
922}
923
924int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
925{
926 int ret;
927 ret = EVP_DecryptFinal_ex(ctx, out, outl);
928 return ret;
929}
930
931int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
932{
933 int i, n;
934 unsigned int b;
935 size_t soutl;
936 int ret;
937 int blocksize;
938
939 /* Prevent accidental use of encryption context when decrypting */
940 if (ctx->encrypt) {
941 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION);
942 return 0;
943 }
944
945 if (ctx->cipher == NULL) {
946 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_NO_CIPHER_SET);
947 return 0;
948 }
949
950 if (ctx->cipher->prov == NULL)
951 goto legacy;
952
953 blocksize = EVP_CIPHER_CTX_block_size(ctx);
954
955 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
956 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR);
957 return 0;
958 }
959
960 ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl,
961 blocksize == 1 ? 0 : blocksize);
962
963 if (ret) {
964 if (soutl > INT_MAX) {
965 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR);
966 return 0;
967 }
968 *outl = soutl;
969 }
970
971 return ret;
972
973 /* TODO(3.0): Remove legacy code below */
974 legacy:
975
976 *outl = 0;
977 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
978 i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
979 if (i < 0)
980 return 0;
981 else
982 *outl = i;
983 return 1;
984 }
985
986 b = ctx->cipher->block_size;
987 if (ctx->flags & EVP_CIPH_NO_PADDING) {
988 if (ctx->buf_len) {
989 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,
990 EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
991 return 0;
992 }
993 *outl = 0;
994 return 1;
995 }
996 if (b > 1) {
997 if (ctx->buf_len || !ctx->final_used) {
998 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
999 return 0;
1000 }
1001 OPENSSL_assert(b <= sizeof(ctx->final));
1002
1003 /*
1004 * The following assumes that the ciphertext has been authenticated.
1005 * Otherwise it provides a padding oracle.
1006 */
1007 n = ctx->final[b - 1];
1008 if (n == 0 || n > (int)b) {
1009 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT);
1010 return 0;
1011 }
1012 for (i = 0; i < n; i++) {
1013 if (ctx->final[--b] != n) {
1014 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT);
1015 return 0;
1016 }
1017 }
1018 n = ctx->cipher->block_size - n;
1019 for (i = 0; i < n; i++)
1020 out[i] = ctx->final[i];
1021 *outl = n;
1022 } else
1023 *outl = 0;
1024 return 1;
1025}
1026
1027int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
1028{
1029 if (c->cipher->prov != NULL) {
1030 int ok;
1031 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1032 size_t len = keylen;
1033
1034 if (EVP_CIPHER_CTX_key_length(c) == keylen)
1035 return 1;
1036
1037 /* Check the cipher actually understands this parameter */
1038 if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher),
1039 OSSL_CIPHER_PARAM_KEYLEN) == NULL)
1040 return 0;
1041
1042 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
1043 ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params);
1044
1045 return ok > 0 ? 1 : 0;
1046 }
1047
1048 /* TODO(3.0) legacy code follows */
1049
1050 /*
1051 * Note there have never been any built-in ciphers that define this flag
1052 * since it was first introduced.
1053 */
1054 if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
1055 return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
1056 if (EVP_CIPHER_CTX_key_length(c) == keylen)
1057 return 1;
1058 if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
1059 c->key_len = keylen;
1060 return 1;
1061 }
1062 EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH);
1063 return 0;
1064}
1065
1066int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
1067{
1068 int ok;
1069 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1070 unsigned int pd = pad;
1071
1072 if (pad)
1073 ctx->flags &= ~EVP_CIPH_NO_PADDING;
1074 else
1075 ctx->flags |= EVP_CIPH_NO_PADDING;
1076
1077 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd);
1078 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1079
1080 return ok != 0;
1081}
1082
1083int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1084{
1085 int ret = EVP_CTRL_RET_UNSUPPORTED;
1086 int set_params = 1;
1087 size_t sz = arg;
1088 unsigned int i;
1089 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1090
1091 if (ctx == NULL || ctx->cipher == NULL) {
1092 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
1093 return 0;
1094 }
1095
1096 if (ctx->cipher->prov == NULL)
1097 goto legacy;
1098
1099 switch (type) {
1100 case EVP_CTRL_SET_KEY_LENGTH:
1101 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz);
1102 break;
1103 case EVP_CTRL_RAND_KEY: /* Used by DES */
1104 set_params = 0;
1105 params[0] =
1106 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY,
1107 ptr, sz);
1108 break;
1109
1110 case EVP_CTRL_INIT:
1111 /*
1112 * TODO(3.0) EVP_CTRL_INIT is purely legacy, no provider counterpart
1113 * As a matter of fact, this should be dead code, but some caller
1114 * might still do a direct control call with this command, so...
1115 * Legacy methods return 1 except for exceptional circumstances, so
1116 * we do the same here to not be disruptive.
1117 */
1118 return 1;
1119 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */
1120 default:
1121 goto end;
1122 case EVP_CTRL_GET_IV:
1123 set_params = 0;
1124 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV,
1125 ptr, sz);
1126 break;
1127 case EVP_CTRL_AEAD_SET_IVLEN:
1128 if (arg < 0)
1129 return 0;
1130 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1131 break;
1132 case EVP_CTRL_GCM_SET_IV_FIXED:
1133 params[0] =
1134 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED,
1135 ptr, sz);
1136 break;
1137 case EVP_CTRL_GET_RC5_ROUNDS:
1138 set_params = 0; /* Fall thru */
1139 case EVP_CTRL_SET_RC5_ROUNDS:
1140 if (arg < 0)
1141 return 0;
1142 i = (unsigned int)arg;
1143 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i);
1144 break;
1145 case EVP_CTRL_SET_SPEED:
1146 if (arg < 0)
1147 return 0;
1148 i = (unsigned int)arg;
1149 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i);
1150 break;
1151 case EVP_CTRL_AEAD_GET_TAG:
1152 set_params = 0; /* Fall thru */
1153 case EVP_CTRL_AEAD_SET_TAG:
1154 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
1155 ptr, sz);
1156 break;
1157 case EVP_CTRL_AEAD_SET_MAC_KEY:
1158 params[0] =
1159 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_MAC_KEY,
1160 ptr, sz);
1161 break;
1162 case EVP_CTRL_AEAD_TLS1_AAD:
1163 /* This one does a set and a get - since it returns a padding size */
1164 params[0] =
1165 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD,
1166 ptr, sz);
1167 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1168 if (ret <= 0)
1169 goto end;
1170 params[0] =
1171 OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz);
1172 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1173 if (ret <= 0)
1174 goto end;
1175 return sz;
1176#ifndef OPENSSL_NO_RC2
1177 case EVP_CTRL_GET_RC2_KEY_BITS:
1178 set_params = 0; /* Fall thru */
1179 case EVP_CTRL_SET_RC2_KEY_BITS:
1180 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz);
1181 break;
1182#endif /* OPENSSL_NO_RC2 */
1183 }
1184
1185 if (set_params)
1186 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1187 else
1188 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1189 goto end;
1190
1191/* TODO(3.0): Remove legacy code below */
1192legacy:
1193 if (ctx->cipher->ctrl == NULL) {
1194 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
1195 return 0;
1196 }
1197
1198 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
1199
1200 end:
1201 if (ret == EVP_CTRL_RET_UNSUPPORTED) {
1202 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL,
1203 EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
1204 return 0;
1205 }
1206 return ret;
1207}
1208
1209int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[])
1210{
1211 if (cipher != NULL && cipher->get_params != NULL)
1212 return cipher->get_params(params);
1213 return 0;
1214}
1215
1216int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[])
1217{
1218 if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL)
1219 return ctx->cipher->set_ctx_params(ctx->provctx, params);
1220 return 0;
1221}
1222
1223int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[])
1224{
1225 if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL)
1226 return ctx->cipher->get_ctx_params(ctx->provctx, params);
1227 return 0;
1228}
1229
1230const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher)
1231{
1232 if (cipher != NULL && cipher->gettable_params != NULL)
1233 return cipher->gettable_params();
1234 return NULL;
1235}
1236
1237const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher)
1238{
1239 if (cipher != NULL && cipher->settable_ctx_params != NULL)
1240 return cipher->settable_ctx_params();
1241 return NULL;
1242}
1243
1244const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher)
1245{
1246 if (cipher != NULL && cipher->gettable_ctx_params != NULL)
1247 return cipher->gettable_ctx_params();
1248 return NULL;
1249}
1250
1251int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
1252{
1253 if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
1254 return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
1255
1256#ifdef FIPS_MODE
1257 return 0;
1258#else
1259 {
1260 int kl;
1261
1262 kl = EVP_CIPHER_CTX_key_length(ctx);
1263 if (kl <= 0 || RAND_priv_bytes(key, kl) <= 0)
1264 return 0;
1265 return 1;
1266 }
1267#endif /* FIPS_MODE */
1268}
1269
1270int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
1271{
1272 if ((in == NULL) || (in->cipher == NULL)) {
1273 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED);
1274 return 0;
1275 }
1276
1277 if (in->cipher->prov == NULL)
1278 goto legacy;
1279
1280 if (in->cipher->dupctx == NULL) {
1281 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX);
1282 return 0;
1283 }
1284
1285 EVP_CIPHER_CTX_reset(out);
1286
1287 *out = *in;
1288 out->provctx = NULL;
1289
1290 if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) {
1291 out->fetched_cipher = NULL;
1292 return 0;
1293 }
1294
1295 out->provctx = in->cipher->dupctx(in->provctx);
1296 if (out->provctx == NULL) {
1297 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX);
1298 return 0;
1299 }
1300
1301 return 1;
1302
1303 /* TODO(3.0): Remove legacy code below */
1304 legacy:
1305
1306#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
1307 /* Make sure it's safe to copy a cipher context using an ENGINE */
1308 if (in->engine && !ENGINE_init(in->engine)) {
1309 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB);
1310 return 0;
1311 }
1312#endif
1313
1314 EVP_CIPHER_CTX_reset(out);
1315 memcpy(out, in, sizeof(*out));
1316
1317 if (in->cipher_data && in->cipher->ctx_size) {
1318 out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
1319 if (out->cipher_data == NULL) {
1320 out->cipher = NULL;
1321 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE);
1322 return 0;
1323 }
1324 memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
1325 }
1326
1327 if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
1328 if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
1329 out->cipher = NULL;
1330 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR);
1331 return 0;
1332 }
1333 return 1;
1334}
1335
1336EVP_CIPHER *evp_cipher_new(void)
1337{
1338 EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
1339
1340 if (cipher != NULL) {
1341 cipher->lock = CRYPTO_THREAD_lock_new();
1342 if (cipher->lock == NULL) {
1343 OPENSSL_free(cipher);
1344 return NULL;
1345 }
1346 cipher->refcnt = 1;
1347 }
1348 return cipher;
1349}
1350
1351/*
1352 * FIPS module note: since internal fetches will be entirely
1353 * provider based, we know that none of its code depends on legacy
1354 * NIDs or any functionality that use them.
1355 */
1356#ifndef FIPS_MODE
1357/* TODO(3.x) get rid of the need for legacy NIDs */
1358static void set_legacy_nid(const char *name, void *vlegacy_nid)
1359{
1360 int nid;
1361 int *legacy_nid = vlegacy_nid;
1362 /*
1363 * We use lowest level function to get the associated method, because
1364 * higher level functions such as EVP_get_cipherbyname() have changed
1365 * to look at providers too.
1366 */
1367 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
1368
1369 if (*legacy_nid == -1) /* We found a clash already */
1370 return;
1371 if (legacy_method == NULL)
1372 return;
1373 nid = EVP_CIPHER_nid(legacy_method);
1374 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
1375 *legacy_nid = -1;
1376 return;
1377 }
1378 *legacy_nid = nid;
1379}
1380#endif
1381
1382static void *evp_cipher_from_dispatch(const int name_id,
1383 const OSSL_DISPATCH *fns,
1384 OSSL_PROVIDER *prov)
1385{
1386 EVP_CIPHER *cipher = NULL;
1387 int fnciphcnt = 0, fnctxcnt = 0;
1388
1389 if ((cipher = evp_cipher_new()) == NULL) {
1390 EVPerr(0, ERR_R_MALLOC_FAILURE);
1391 return NULL;
1392 }
1393
1394#ifndef FIPS_MODE
1395 /* TODO(3.x) get rid of the need for legacy NIDs */
1396 cipher->nid = NID_undef;
1397 evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid);
1398 if (cipher->nid == -1) {
1399 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1400 EVP_CIPHER_free(cipher);
1401 return NULL;
1402 }
1403#endif
1404
1405 cipher->name_id = name_id;
1406
1407 for (; fns->function_id != 0; fns++) {
1408 switch (fns->function_id) {
1409 case OSSL_FUNC_CIPHER_NEWCTX:
1410 if (cipher->newctx != NULL)
1411 break;
1412 cipher->newctx = OSSL_get_OP_cipher_newctx(fns);
1413 fnctxcnt++;
1414 break;
1415 case OSSL_FUNC_CIPHER_ENCRYPT_INIT:
1416 if (cipher->einit != NULL)
1417 break;
1418 cipher->einit = OSSL_get_OP_cipher_encrypt_init(fns);
1419 fnciphcnt++;
1420 break;
1421 case OSSL_FUNC_CIPHER_DECRYPT_INIT:
1422 if (cipher->dinit != NULL)
1423 break;
1424 cipher->dinit = OSSL_get_OP_cipher_decrypt_init(fns);
1425 fnciphcnt++;
1426 break;
1427 case OSSL_FUNC_CIPHER_UPDATE:
1428 if (cipher->cupdate != NULL)
1429 break;
1430 cipher->cupdate = OSSL_get_OP_cipher_update(fns);
1431 fnciphcnt++;
1432 break;
1433 case OSSL_FUNC_CIPHER_FINAL:
1434 if (cipher->cfinal != NULL)
1435 break;
1436 cipher->cfinal = OSSL_get_OP_cipher_final(fns);
1437 fnciphcnt++;
1438 break;
1439 case OSSL_FUNC_CIPHER_CIPHER:
1440 if (cipher->ccipher != NULL)
1441 break;
1442 cipher->ccipher = OSSL_get_OP_cipher_cipher(fns);
1443 break;
1444 case OSSL_FUNC_CIPHER_FREECTX:
1445 if (cipher->freectx != NULL)
1446 break;
1447 cipher->freectx = OSSL_get_OP_cipher_freectx(fns);
1448 fnctxcnt++;
1449 break;
1450 case OSSL_FUNC_CIPHER_DUPCTX:
1451 if (cipher->dupctx != NULL)
1452 break;
1453 cipher->dupctx = OSSL_get_OP_cipher_dupctx(fns);
1454 break;
1455 case OSSL_FUNC_CIPHER_GET_PARAMS:
1456 if (cipher->get_params != NULL)
1457 break;
1458 cipher->get_params = OSSL_get_OP_cipher_get_params(fns);
1459 break;
1460 case OSSL_FUNC_CIPHER_GET_CTX_PARAMS:
1461 if (cipher->get_ctx_params != NULL)
1462 break;
1463 cipher->get_ctx_params = OSSL_get_OP_cipher_get_ctx_params(fns);
1464 break;
1465 case OSSL_FUNC_CIPHER_SET_CTX_PARAMS:
1466 if (cipher->set_ctx_params != NULL)
1467 break;
1468 cipher->set_ctx_params = OSSL_get_OP_cipher_set_ctx_params(fns);
1469 break;
1470 case OSSL_FUNC_CIPHER_GETTABLE_PARAMS:
1471 if (cipher->gettable_params != NULL)
1472 break;
1473 cipher->gettable_params = OSSL_get_OP_cipher_gettable_params(fns);
1474 break;
1475 case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS:
1476 if (cipher->gettable_ctx_params != NULL)
1477 break;
1478 cipher->gettable_ctx_params =
1479 OSSL_get_OP_cipher_gettable_ctx_params(fns);
1480 break;
1481 case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS:
1482 if (cipher->settable_ctx_params != NULL)
1483 break;
1484 cipher->settable_ctx_params =
1485 OSSL_get_OP_cipher_settable_ctx_params(fns);
1486 break;
1487 }
1488 }
1489 if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4)
1490 || (fnciphcnt == 0 && cipher->ccipher == NULL)
1491 || fnctxcnt != 2) {
1492 /*
1493 * In order to be a consistent set of functions we must have at least
1494 * a complete set of "encrypt" functions, or a complete set of "decrypt"
1495 * functions, or a single "cipher" function. In all cases we need both
1496 * the "newctx" and "freectx" functions.
1497 */
1498 EVP_CIPHER_free(cipher);
1499 EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1500 return NULL;
1501 }
1502 cipher->prov = prov;
1503 if (prov != NULL)
1504 ossl_provider_up_ref(prov);
1505
1506 return cipher;
1507}
1508
1509static int evp_cipher_up_ref(void *cipher)
1510{
1511 return EVP_CIPHER_up_ref(cipher);
1512}
1513
1514static void evp_cipher_free(void *cipher)
1515{
1516 EVP_CIPHER_free(cipher);
1517}
1518
1519EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm,
1520 const char *properties)
1521{
1522 EVP_CIPHER *cipher =
1523 evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties,
1524 evp_cipher_from_dispatch, evp_cipher_up_ref,
1525 evp_cipher_free);
1526
1527 if (cipher != NULL && !evp_cipher_cache_constants(cipher)) {
1528 EVP_CIPHER_free(cipher);
1529 cipher = NULL;
1530 }
1531 return cipher;
1532}
1533
1534int EVP_CIPHER_up_ref(EVP_CIPHER *cipher)
1535{
1536 int ref = 0;
1537
1538 CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock);
1539 return 1;
1540}
1541
1542void EVP_CIPHER_free(EVP_CIPHER *cipher)
1543{
1544 int i;
1545
1546 if (cipher == NULL)
1547 return;
1548
1549 CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock);
1550 if (i > 0)
1551 return;
1552 ossl_provider_free(cipher->prov);
1553 CRYPTO_THREAD_lock_free(cipher->lock);
1554 OPENSSL_free(cipher);
1555}
1556
1557void EVP_CIPHER_do_all_provided(OPENSSL_CTX *libctx,
1558 void (*fn)(EVP_CIPHER *mac, void *arg),
1559 void *arg)
1560{
1561 evp_generic_do_all(libctx, OSSL_OP_CIPHER,
1562 (void (*)(void *, void *))fn, arg,
1563 evp_cipher_from_dispatch, evp_cipher_free);
1564}
1565