1 /*
2 * Copyright 1995-2024 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 /* We need to use some engine deprecated APIs */
11 #define OPENSSL_SUPPRESS_DEPRECATED
12
13 #include <stdio.h>
14 #include <limits.h>
15 #include <assert.h>
16 #include <openssl/evp.h>
17 #include <openssl/err.h>
18 #include <openssl/rand.h>
19 #ifndef FIPS_MODULE
20 # include <openssl/engine.h>
21 #endif
22 #include <openssl/params.h>
23 #include <openssl/core_names.h>
24 #include "internal/cryptlib.h"
25 #include "internal/provider.h"
26 #include "internal/core.h"
27 #include "internal/safe_math.h"
28 #include "crypto/evp.h"
29 #include "evp_local.h"
30
OSSL_SAFE_MATH_SIGNED(int,int)31 OSSL_SAFE_MATH_SIGNED(int, int)
32
33 int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx)
34 {
35 if (ctx == NULL)
36 return 1;
37
38 if (ctx->cipher == NULL || ctx->cipher->prov == NULL)
39 goto legacy;
40
41 if (ctx->algctx != NULL) {
42 if (ctx->cipher->freectx != NULL)
43 ctx->cipher->freectx(ctx->algctx);
44 ctx->algctx = NULL;
45 }
46 if (ctx->fetched_cipher != NULL)
47 EVP_CIPHER_free(ctx->fetched_cipher);
48 memset(ctx, 0, sizeof(*ctx));
49 ctx->iv_len = -1;
50
51 return 1;
52
53 /* Remove legacy code below when legacy support is removed. */
54 legacy:
55
56 if (ctx->cipher != NULL) {
57 if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx))
58 return 0;
59 /* Cleanse cipher context data */
60 if (ctx->cipher_data && ctx->cipher->ctx_size)
61 OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size);
62 }
63 OPENSSL_free(ctx->cipher_data);
64 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
65 ENGINE_finish(ctx->engine);
66 #endif
67 memset(ctx, 0, sizeof(*ctx));
68 ctx->iv_len = -1;
69 return 1;
70 }
71
EVP_CIPHER_CTX_new(void)72 EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
73 {
74 EVP_CIPHER_CTX *ctx;
75
76 ctx = OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX));
77 if (ctx == NULL)
78 return NULL;
79
80 ctx->iv_len = -1;
81 return ctx;
82 }
83
EVP_CIPHER_CTX_free(EVP_CIPHER_CTX * ctx)84 void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
85 {
86 if (ctx == NULL)
87 return;
88 EVP_CIPHER_CTX_reset(ctx);
89 OPENSSL_free(ctx);
90 }
91
evp_cipher_init_internal(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher,ENGINE * impl,const unsigned char * key,const unsigned char * iv,int enc,uint8_t is_pipeline,const OSSL_PARAM params[])92 static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx,
93 const EVP_CIPHER *cipher,
94 ENGINE *impl, const unsigned char *key,
95 const unsigned char *iv, int enc,
96 uint8_t is_pipeline,
97 const OSSL_PARAM params[])
98 {
99 int n;
100 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
101 ENGINE *tmpimpl = NULL;
102 #endif
103
104 /*
105 * enc == 1 means we are encrypting.
106 * enc == 0 means we are decrypting.
107 * enc == -1 means, use the previously initialised value for encrypt/decrypt
108 */
109 if (enc == -1) {
110 enc = ctx->encrypt;
111 } else {
112 if (enc)
113 enc = 1;
114 ctx->encrypt = enc;
115 }
116
117 if (cipher == NULL && ctx->cipher == NULL) {
118 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
119 return 0;
120 }
121
122 /* Code below to be removed when legacy support is dropped. */
123 if (is_pipeline)
124 goto nonlegacy;
125
126 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
127 /*
128 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
129 * this context may already have an ENGINE! Try to avoid releasing the
130 * previous handle, re-querying for an ENGINE, and having a
131 * reinitialisation, when it may all be unnecessary.
132 */
133 if (ctx->engine && ctx->cipher
134 && (cipher == NULL || cipher->nid == ctx->cipher->nid))
135 goto skip_to_init;
136
137 if (cipher != NULL && impl == NULL) {
138 /* Ask if an ENGINE is reserved for this job */
139 tmpimpl = ENGINE_get_cipher_engine(cipher->nid);
140 }
141 #endif
142
143 /*
144 * If there are engines involved then we should use legacy handling for now.
145 */
146 if (ctx->engine != NULL
147 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
148 || tmpimpl != NULL
149 #endif
150 || impl != NULL
151 || (cipher != NULL && cipher->origin == EVP_ORIG_METH)
152 || (cipher == NULL && ctx->cipher != NULL
153 && ctx->cipher->origin == EVP_ORIG_METH)) {
154 if (ctx->cipher == ctx->fetched_cipher)
155 ctx->cipher = NULL;
156 EVP_CIPHER_free(ctx->fetched_cipher);
157 ctx->fetched_cipher = NULL;
158 goto legacy;
159 }
160 /*
161 * Ensure a context left lying around from last time is cleared
162 * (legacy code)
163 */
164 if (cipher != NULL && ctx->cipher != NULL) {
165 if (ctx->cipher->cleanup != NULL && !ctx->cipher->cleanup(ctx))
166 return 0;
167 OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size);
168 ctx->cipher_data = NULL;
169 }
170
171 /* Start of non-legacy code below */
172 nonlegacy:
173 /* Ensure a context left lying around from last time is cleared */
174 if (cipher != NULL && ctx->cipher != NULL) {
175 unsigned long flags = ctx->flags;
176
177 EVP_CIPHER_CTX_reset(ctx);
178 /* Restore encrypt and flags */
179 ctx->encrypt = enc;
180 ctx->flags = flags;
181 }
182
183 if (cipher == NULL)
184 cipher = ctx->cipher;
185
186 if (cipher->prov == NULL) {
187 #ifdef FIPS_MODULE
188 /* We only do explicit fetches inside the FIPS module */
189 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
190 return 0;
191 #else
192 EVP_CIPHER *provciph =
193 EVP_CIPHER_fetch(NULL,
194 cipher->nid == NID_undef ? "NULL"
195 : OBJ_nid2sn(cipher->nid),
196 "");
197
198 if (provciph == NULL)
199 return 0;
200 cipher = provciph;
201 EVP_CIPHER_free(ctx->fetched_cipher);
202 ctx->fetched_cipher = provciph;
203 #endif
204 }
205
206 if (!ossl_assert(cipher->prov != NULL)) {
207 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
208 return 0;
209 }
210
211 if (cipher != ctx->fetched_cipher) {
212 if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) {
213 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
214 return 0;
215 }
216 EVP_CIPHER_free(ctx->fetched_cipher);
217 /* Coverity false positive, the reference counting is confusing it */
218 /* coverity[use_after_free] */
219 ctx->fetched_cipher = (EVP_CIPHER *)cipher;
220 }
221 ctx->cipher = cipher;
222
223 if (is_pipeline && !EVP_CIPHER_can_pipeline(cipher, enc)) {
224 ERR_raise(ERR_LIB_EVP, EVP_R_PIPELINE_NOT_SUPPORTED);
225 return 0;
226 }
227
228 if (ctx->algctx == NULL) {
229 ctx->algctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov));
230 if (ctx->algctx == NULL) {
231 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
232 return 0;
233 }
234 }
235
236 if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) {
237 /*
238 * If this ctx was already set up for no padding then we need to tell
239 * the new cipher about it.
240 */
241 if (!EVP_CIPHER_CTX_set_padding(ctx, 0))
242 return 0;
243 }
244
245 #ifndef FIPS_MODULE
246 /*
247 * Fix for CVE-2023-5363
248 * Passing in a size as part of the init call takes effect late
249 * so, force such to occur before the initialisation.
250 *
251 * The FIPS provider's internal library context is used in a manner
252 * such that this is not an issue.
253 */
254 if (params != NULL) {
255 OSSL_PARAM param_lens[3] = { OSSL_PARAM_END, OSSL_PARAM_END,
256 OSSL_PARAM_END };
257 OSSL_PARAM *q = param_lens;
258 const OSSL_PARAM *p;
259
260 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
261 if (p != NULL)
262 memcpy(q++, p, sizeof(*q));
263
264 /*
265 * Note that OSSL_CIPHER_PARAM_AEAD_IVLEN is a synonym for
266 * OSSL_CIPHER_PARAM_IVLEN so both are covered here.
267 */
268 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN);
269 if (p != NULL)
270 memcpy(q++, p, sizeof(*q));
271
272 if (q != param_lens) {
273 if (!EVP_CIPHER_CTX_set_params(ctx, param_lens)) {
274 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_LENGTH);
275 return 0;
276 }
277 }
278 }
279 #endif
280
281 if (is_pipeline)
282 return 1;
283
284 if (enc) {
285 if (ctx->cipher->einit == NULL) {
286 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
287 return 0;
288 }
289
290 return ctx->cipher->einit(ctx->algctx,
291 key,
292 key == NULL ? 0
293 : EVP_CIPHER_CTX_get_key_length(ctx),
294 iv,
295 iv == NULL ? 0
296 : EVP_CIPHER_CTX_get_iv_length(ctx),
297 params);
298 }
299
300 if (ctx->cipher->dinit == NULL) {
301 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
302 return 0;
303 }
304
305 return ctx->cipher->dinit(ctx->algctx,
306 key,
307 key == NULL ? 0
308 : EVP_CIPHER_CTX_get_key_length(ctx),
309 iv,
310 iv == NULL ? 0
311 : EVP_CIPHER_CTX_get_iv_length(ctx),
312 params);
313
314 /* Code below to be removed when legacy support is dropped. */
315 legacy:
316
317 if (cipher != NULL) {
318 /*
319 * Ensure a context left lying around from last time is cleared (we
320 * previously attempted to avoid this if the same ENGINE and
321 * EVP_CIPHER could be used).
322 */
323 if (ctx->cipher) {
324 unsigned long flags = ctx->flags;
325 EVP_CIPHER_CTX_reset(ctx);
326 /* Restore encrypt and flags */
327 ctx->encrypt = enc;
328 ctx->flags = flags;
329 }
330 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
331 if (impl != NULL) {
332 if (!ENGINE_init(impl)) {
333 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
334 return 0;
335 }
336 } else {
337 impl = tmpimpl;
338 }
339 if (impl != NULL) {
340 /* There's an ENGINE for this job ... (apparently) */
341 const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
342
343 if (c == NULL) {
344 /*
345 * One positive side-effect of US's export control history,
346 * is that we should at least be able to avoid using US
347 * misspellings of "initialisation"?
348 */
349 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
350 return 0;
351 }
352 /* We'll use the ENGINE's private cipher definition */
353 cipher = c;
354 /*
355 * Store the ENGINE functional reference so we know 'cipher' came
356 * from an ENGINE and we need to release it when done.
357 */
358 ctx->engine = impl;
359 } else {
360 ctx->engine = NULL;
361 }
362 #endif
363
364 ctx->cipher = cipher;
365 if (ctx->cipher->ctx_size) {
366 ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
367 if (ctx->cipher_data == NULL) {
368 ctx->cipher = NULL;
369 return 0;
370 }
371 } else {
372 ctx->cipher_data = NULL;
373 }
374 ctx->key_len = cipher->key_len;
375 /* Preserve wrap enable flag, zero everything else */
376 ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
377 if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
378 if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL) <= 0) {
379 ctx->cipher = NULL;
380 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
381 return 0;
382 }
383 }
384 }
385 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
386 skip_to_init:
387 #endif
388 if (ctx->cipher == NULL)
389 return 0;
390
391 /* we assume block size is a power of 2 in *cryptUpdate */
392 OPENSSL_assert(ctx->cipher->block_size == 1
393 || ctx->cipher->block_size == 8
394 || ctx->cipher->block_size == 16);
395
396 if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
397 && EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_WRAP_MODE) {
398 ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED);
399 return 0;
400 }
401
402 if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx))
403 & EVP_CIPH_CUSTOM_IV) == 0) {
404 switch (EVP_CIPHER_CTX_get_mode(ctx)) {
405
406 case EVP_CIPH_STREAM_CIPHER:
407 case EVP_CIPH_ECB_MODE:
408 break;
409
410 case EVP_CIPH_CFB_MODE:
411 case EVP_CIPH_OFB_MODE:
412
413 ctx->num = 0;
414 /* fall-through */
415
416 case EVP_CIPH_CBC_MODE:
417 n = EVP_CIPHER_CTX_get_iv_length(ctx);
418 if (n < 0 || n > (int)sizeof(ctx->iv)) {
419 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
420 return 0;
421 }
422 if (iv != NULL)
423 memcpy(ctx->oiv, iv, n);
424 memcpy(ctx->iv, ctx->oiv, n);
425 break;
426
427 case EVP_CIPH_CTR_MODE:
428 ctx->num = 0;
429 /* Don't reuse IV for CTR mode */
430 if (iv != NULL) {
431 n = EVP_CIPHER_CTX_get_iv_length(ctx);
432 if (n <= 0 || n > (int)sizeof(ctx->iv)) {
433 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
434 return 0;
435 }
436 memcpy(ctx->iv, iv, n);
437 }
438 break;
439
440 default:
441 return 0;
442 }
443 }
444
445 if (key != NULL || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
446 if (!ctx->cipher->init(ctx, key, iv, enc))
447 return 0;
448 }
449 ctx->buf_len = 0;
450 ctx->final_used = 0;
451 ctx->block_mask = ctx->cipher->block_size - 1;
452 return 1;
453 }
454
EVP_CipherInit_ex2(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher,const unsigned char * key,const unsigned char * iv,int enc,const OSSL_PARAM params[])455 int EVP_CipherInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
456 const unsigned char *key, const unsigned char *iv,
457 int enc, const OSSL_PARAM params[])
458 {
459 return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, 0, params);
460 }
461
EVP_CipherInit(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher,const unsigned char * key,const unsigned char * iv,int enc)462 int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
463 const unsigned char *key, const unsigned char *iv, int enc)
464 {
465 if (cipher != NULL)
466 EVP_CIPHER_CTX_reset(ctx);
467 return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, 0, NULL);
468 }
469
EVP_CipherInit_ex(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher,ENGINE * impl,const unsigned char * key,const unsigned char * iv,int enc)470 int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
471 ENGINE *impl, const unsigned char *key,
472 const unsigned char *iv, int enc)
473 {
474 return evp_cipher_init_internal(ctx, cipher, impl, key, iv, enc, 0, NULL);
475 }
476
EVP_CipherPipelineEncryptInit(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher,const unsigned char * key,size_t keylen,size_t numpipes,const unsigned char ** iv,size_t ivlen)477 int EVP_CipherPipelineEncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
478 const unsigned char *key, size_t keylen,
479 size_t numpipes,
480 const unsigned char **iv, size_t ivlen)
481 {
482 if (numpipes > EVP_MAX_PIPES) {
483 ERR_raise(ERR_LIB_EVP, EVP_R_TOO_MANY_PIPES);
484 return 0;
485 }
486
487 ctx->numpipes = numpipes;
488
489 if (!evp_cipher_init_internal(ctx, cipher, NULL, NULL, NULL, 1, 1,
490 NULL))
491 return 0;
492
493 if (ctx->cipher->p_einit == NULL) {
494 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
495 return 0;
496 }
497
498 return ctx->cipher->p_einit(ctx->algctx,
499 key,
500 keylen,
501 numpipes,
502 iv,
503 ivlen,
504 NULL);
505 }
506
EVP_CipherPipelineDecryptInit(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher,const unsigned char * key,size_t keylen,size_t numpipes,const unsigned char ** iv,size_t ivlen)507 int EVP_CipherPipelineDecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
508 const unsigned char *key, size_t keylen,
509 size_t numpipes,
510 const unsigned char **iv, size_t ivlen)
511 {
512 if (numpipes > EVP_MAX_PIPES) {
513 ERR_raise(ERR_LIB_EVP, EVP_R_TOO_MANY_PIPES);
514 return 0;
515 }
516
517 ctx->numpipes = numpipes;
518
519 if (!evp_cipher_init_internal(ctx, cipher, NULL, NULL, NULL, 0, 1,
520 NULL))
521 return 0;
522
523 if (ctx->cipher->p_dinit == NULL) {
524 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
525 return 0;
526 }
527
528 return ctx->cipher->p_dinit(ctx->algctx,
529 key,
530 keylen,
531 numpipes,
532 iv,
533 ivlen,
534 NULL);
535 }
536
EVP_CipherUpdate(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl,const unsigned char * in,int inl)537 int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
538 const unsigned char *in, int inl)
539 {
540 if (ctx->encrypt)
541 return EVP_EncryptUpdate(ctx, out, outl, in, inl);
542 else
543 return EVP_DecryptUpdate(ctx, out, outl, in, inl);
544 }
545
EVP_CipherPipelineUpdate(EVP_CIPHER_CTX * ctx,unsigned char ** out,size_t * outl,const size_t * outsize,const unsigned char ** in,const size_t * inl)546 int EVP_CipherPipelineUpdate(EVP_CIPHER_CTX *ctx,
547 unsigned char **out, size_t *outl,
548 const size_t *outsize,
549 const unsigned char **in, const size_t *inl)
550 {
551 size_t i;
552
553 if (ossl_unlikely(outl == NULL || inl == NULL)) {
554 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
555 return 0;
556 }
557
558 if (ossl_unlikely(ctx->cipher == NULL)) {
559 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
560 return 0;
561 }
562
563 if (ossl_unlikely(ctx->cipher->prov == NULL)) {
564 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
565 return 0;
566 }
567
568 if (ossl_unlikely(ctx->cipher->p_cupdate == NULL)) {
569 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
570 return 0;
571 }
572
573 for (i = 0; i < ctx->numpipes; i++)
574 outl[i] = 0;
575
576 return ctx->cipher->p_cupdate(ctx->algctx, ctx->numpipes,
577 out, outl, outsize,
578 in, inl);
579 }
580
EVP_CipherFinal_ex(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl)581 int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
582 {
583 if (ctx->encrypt)
584 return EVP_EncryptFinal_ex(ctx, out, outl);
585 else
586 return EVP_DecryptFinal_ex(ctx, out, outl);
587 }
588
EVP_CipherFinal(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl)589 int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
590 {
591 if (ctx->encrypt)
592 return EVP_EncryptFinal(ctx, out, outl);
593 else
594 return EVP_DecryptFinal(ctx, out, outl);
595 }
596
EVP_CipherPipelineFinal(EVP_CIPHER_CTX * ctx,unsigned char ** out,size_t * outl,const size_t * outsize)597 int EVP_CipherPipelineFinal(EVP_CIPHER_CTX *ctx,
598 unsigned char **out, size_t *outl,
599 const size_t *outsize)
600 {
601 size_t i;
602
603 if (ossl_unlikely(outl == NULL)) {
604 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
605 return 0;
606 }
607
608 if (ossl_unlikely(ctx->cipher == NULL)) {
609 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
610 return 0;
611 }
612
613 if (ossl_unlikely(ctx->cipher->prov == NULL)) {
614 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
615 return 0;
616 }
617
618 if (ossl_unlikely(ctx->cipher->p_cfinal == NULL)) {
619 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
620 return 0;
621 }
622
623 for (i = 0; i < ctx->numpipes; i++)
624 outl[i] = 0;
625
626 return ctx->cipher->p_cfinal(ctx->algctx, ctx->numpipes,
627 out, outl, outsize);
628 }
629
EVP_EncryptInit(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher,const unsigned char * key,const unsigned char * iv)630 int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
631 const unsigned char *key, const unsigned char *iv)
632 {
633 return EVP_CipherInit(ctx, cipher, key, iv, 1);
634 }
635
EVP_EncryptInit_ex(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher,ENGINE * impl,const unsigned char * key,const unsigned char * iv)636 int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
637 ENGINE *impl, const unsigned char *key,
638 const unsigned char *iv)
639 {
640 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
641 }
642
EVP_EncryptInit_ex2(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher,const unsigned char * key,const unsigned char * iv,const OSSL_PARAM params[])643 int EVP_EncryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
644 const unsigned char *key, const unsigned char *iv,
645 const OSSL_PARAM params[])
646 {
647 return EVP_CipherInit_ex2(ctx, cipher, key, iv, 1, params);
648 }
649
EVP_DecryptInit(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher,const unsigned char * key,const unsigned char * iv)650 int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
651 const unsigned char *key, const unsigned char *iv)
652 {
653 return EVP_CipherInit(ctx, cipher, key, iv, 0);
654 }
655
EVP_DecryptInit_ex(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher,ENGINE * impl,const unsigned char * key,const unsigned char * iv)656 int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
657 ENGINE *impl, const unsigned char *key,
658 const unsigned char *iv)
659 {
660 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
661 }
662
EVP_DecryptInit_ex2(EVP_CIPHER_CTX * ctx,const EVP_CIPHER * cipher,const unsigned char * key,const unsigned char * iv,const OSSL_PARAM params[])663 int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
664 const unsigned char *key, const unsigned char *iv,
665 const OSSL_PARAM params[])
666 {
667 return EVP_CipherInit_ex2(ctx, cipher, key, iv, 0, params);
668 }
669
670 /*
671 * According to the letter of standard difference between pointers
672 * is specified to be valid only within same object. This makes
673 * it formally challenging to determine if input and output buffers
674 * are not partially overlapping with standard pointer arithmetic.
675 */
676 #ifdef PTRDIFF_T
677 # undef PTRDIFF_T
678 #endif
679 #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64
680 /*
681 * Then we have VMS that distinguishes itself by adhering to
682 * sizeof(size_t)==4 even in 64-bit builds, which means that
683 * difference between two pointers might be truncated to 32 bits.
684 * In the context one can even wonder how comparison for
685 * equality is implemented. To be on the safe side we adhere to
686 * PTRDIFF_T even for comparison for equality.
687 */
688 # define PTRDIFF_T uint64_t
689 #else
690 # define PTRDIFF_T size_t
691 #endif
692
ossl_is_partially_overlapping(const void * ptr1,const void * ptr2,int len)693 int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
694 {
695 PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2;
696 /*
697 * Check for partially overlapping buffers. [Binary logical
698 * operations are used instead of boolean to minimize number
699 * of conditional branches.]
700 */
701 int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) |
702 (diff > (0 - (PTRDIFF_T)len)));
703
704 return overlapped;
705 }
706
evp_EncryptDecryptUpdate(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl,const unsigned char * in,int inl)707 static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
708 unsigned char *out, int *outl,
709 const unsigned char *in, int inl)
710 {
711 int i, j, bl, cmpl = inl;
712
713 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
714 cmpl = safe_div_round_up_int(cmpl, 8, NULL);
715
716 bl = ctx->cipher->block_size;
717
718 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
719 /* If block size > 1 then the cipher will have to do this check */
720 if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
721 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
722 return 0;
723 }
724
725 i = ctx->cipher->do_cipher(ctx, out, in, inl);
726 if (i < 0)
727 return 0;
728 else
729 *outl = i;
730 return 1;
731 }
732
733 if (inl <= 0) {
734 *outl = 0;
735 return inl == 0;
736 }
737 if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
738 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
739 return 0;
740 }
741
742 if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) {
743 if (ctx->cipher->do_cipher(ctx, out, in, inl)) {
744 *outl = inl;
745 return 1;
746 } else {
747 *outl = 0;
748 return 0;
749 }
750 }
751 i = ctx->buf_len;
752 OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
753 if (i != 0) {
754 if (bl - i > inl) {
755 memcpy(&(ctx->buf[i]), in, inl);
756 ctx->buf_len += inl;
757 *outl = 0;
758 return 1;
759 } else {
760 j = bl - i;
761
762 /*
763 * Once we've processed the first j bytes from in, the amount of
764 * data left that is a multiple of the block length is:
765 * (inl - j) & ~(bl - 1)
766 * We must ensure that this amount of data, plus the one block that
767 * we process from ctx->buf does not exceed INT_MAX
768 */
769 if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) {
770 ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
771 return 0;
772 }
773 memcpy(&(ctx->buf[i]), in, j);
774 inl -= j;
775 in += j;
776 if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
777 return 0;
778 out += bl;
779 *outl = bl;
780 }
781 } else
782 *outl = 0;
783 i = inl & (bl - 1);
784 inl -= i;
785 if (inl > 0) {
786 if (!ctx->cipher->do_cipher(ctx, out, in, inl))
787 return 0;
788 *outl += inl;
789 }
790
791 if (i != 0)
792 memcpy(ctx->buf, &(in[inl]), i);
793 ctx->buf_len = i;
794 return 1;
795 }
796
797
EVP_EncryptUpdate(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl,const unsigned char * in,int inl)798 int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
799 const unsigned char *in, int inl)
800 {
801 int ret;
802 size_t soutl, inl_ = (size_t)inl;
803 int blocksize;
804
805 if (ossl_likely(outl != NULL)) {
806 *outl = 0;
807 } else {
808 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
809 return 0;
810 }
811
812 /* Prevent accidental use of decryption context when encrypting */
813 if (ossl_unlikely(!ctx->encrypt)) {
814 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
815 return 0;
816 }
817
818 if (ossl_unlikely(ctx->cipher == NULL)) {
819 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
820 return 0;
821 }
822
823 if (ossl_unlikely(ctx->cipher->prov == NULL))
824 goto legacy;
825
826 blocksize = ctx->cipher->block_size;
827
828 if (ossl_unlikely(ctx->cipher->cupdate == NULL || blocksize < 1)) {
829 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
830 return 0;
831 }
832
833 ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
834 inl_ + (size_t)(blocksize == 1 ? 0 : blocksize),
835 in, inl_);
836
837 if (ossl_likely(ret)) {
838 if (soutl > INT_MAX) {
839 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
840 return 0;
841 }
842 *outl = soutl;
843 }
844
845 return ret;
846
847 /* Code below to be removed when legacy support is dropped. */
848 legacy:
849
850 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
851 }
852
EVP_EncryptFinal(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl)853 int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
854 {
855 int ret;
856 ret = EVP_EncryptFinal_ex(ctx, out, outl);
857 return ret;
858 }
859
EVP_EncryptFinal_ex(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl)860 int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
861 {
862 int n, ret;
863 unsigned int i, b, bl;
864 size_t soutl;
865 int blocksize;
866
867 if (outl != NULL) {
868 *outl = 0;
869 } else {
870 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
871 return 0;
872 }
873
874 /* Prevent accidental use of decryption context when encrypting */
875 if (!ctx->encrypt) {
876 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
877 return 0;
878 }
879
880 if (ctx->cipher == NULL) {
881 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
882 return 0;
883 }
884 if (ctx->cipher->prov == NULL)
885 goto legacy;
886
887 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
888
889 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
890 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
891 return 0;
892 }
893
894 ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
895 blocksize == 1 ? 0 : blocksize);
896
897 if (ret) {
898 if (soutl > INT_MAX) {
899 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
900 return 0;
901 }
902 *outl = soutl;
903 }
904
905 return ret;
906
907 /* Code below to be removed when legacy support is dropped. */
908 legacy:
909
910 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
911 ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
912 if (ret < 0)
913 return 0;
914 else
915 *outl = ret;
916 return 1;
917 }
918
919 b = ctx->cipher->block_size;
920 OPENSSL_assert(b <= sizeof(ctx->buf));
921 if (b == 1) {
922 *outl = 0;
923 return 1;
924 }
925 bl = ctx->buf_len;
926 if (ctx->flags & EVP_CIPH_NO_PADDING) {
927 if (bl) {
928 ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
929 return 0;
930 }
931 *outl = 0;
932 return 1;
933 }
934
935 n = b - bl;
936 for (i = bl; i < b; i++)
937 ctx->buf[i] = n;
938 ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b);
939
940 if (ret)
941 *outl = b;
942
943 return ret;
944 }
945
EVP_DecryptUpdate(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl,const unsigned char * in,int inl)946 int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
947 const unsigned char *in, int inl)
948 {
949 int fix_len, cmpl = inl, ret;
950 unsigned int b;
951 size_t soutl, inl_ = (size_t)inl;
952 int blocksize;
953
954 if (ossl_likely(outl != NULL)) {
955 *outl = 0;
956 } else {
957 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
958 return 0;
959 }
960
961 /* Prevent accidental use of encryption context when decrypting */
962 if (ossl_unlikely(ctx->encrypt)) {
963 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
964 return 0;
965 }
966
967 if (ossl_unlikely(ctx->cipher == NULL)) {
968 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
969 return 0;
970 }
971 if (ossl_unlikely(ctx->cipher->prov == NULL))
972 goto legacy;
973
974 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
975
976 if (ossl_unlikely(ctx->cipher->cupdate == NULL || blocksize < 1)) {
977 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
978 return 0;
979 }
980 ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
981 inl_ + (size_t)(blocksize == 1 ? 0 : blocksize),
982 in, inl_);
983
984 if (ossl_likely(ret)) {
985 if (soutl > INT_MAX) {
986 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
987 return 0;
988 }
989 *outl = soutl;
990 }
991
992 return ret;
993
994 /* Code below to be removed when legacy support is dropped. */
995 legacy:
996
997 b = ctx->cipher->block_size;
998
999 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
1000 cmpl = safe_div_round_up_int(cmpl, 8, NULL);
1001
1002 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
1003 if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
1004 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
1005 return 0;
1006 }
1007
1008 fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
1009 if (fix_len < 0) {
1010 *outl = 0;
1011 return 0;
1012 } else
1013 *outl = fix_len;
1014 return 1;
1015 }
1016
1017 if (inl <= 0) {
1018 *outl = 0;
1019 return inl == 0;
1020 }
1021
1022 if (ctx->flags & EVP_CIPH_NO_PADDING)
1023 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
1024
1025 OPENSSL_assert(b <= sizeof(ctx->final));
1026
1027 if (ctx->final_used) {
1028 /* see comment about PTRDIFF_T comparison above */
1029 if (((PTRDIFF_T)out == (PTRDIFF_T)in)
1030 || ossl_is_partially_overlapping(out, in, b)) {
1031 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
1032 return 0;
1033 }
1034 /*
1035 * final_used is only ever set if buf_len is 0. Therefore the maximum
1036 * length output we will ever see from evp_EncryptDecryptUpdate is
1037 * the maximum multiple of the block length that is <= inl, or just:
1038 * inl & ~(b - 1)
1039 * Since final_used has been set then the final output length is:
1040 * (inl & ~(b - 1)) + b
1041 * This must never exceed INT_MAX
1042 */
1043 if ((inl & ~(b - 1)) > INT_MAX - b) {
1044 ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
1045 return 0;
1046 }
1047 memcpy(out, ctx->final, b);
1048 out += b;
1049 fix_len = 1;
1050 } else
1051 fix_len = 0;
1052
1053 if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl))
1054 return 0;
1055
1056 /*
1057 * if we have 'decrypted' a multiple of block size, make sure we have a
1058 * copy of this last block
1059 */
1060 if (b > 1 && !ctx->buf_len) {
1061 *outl -= b;
1062 ctx->final_used = 1;
1063 memcpy(ctx->final, &out[*outl], b);
1064 } else
1065 ctx->final_used = 0;
1066
1067 if (fix_len)
1068 *outl += b;
1069
1070 return 1;
1071 }
1072
EVP_DecryptFinal(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl)1073 int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
1074 {
1075 int ret;
1076 ret = EVP_DecryptFinal_ex(ctx, out, outl);
1077 return ret;
1078 }
1079
EVP_DecryptFinal_ex(EVP_CIPHER_CTX * ctx,unsigned char * out,int * outl)1080 int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
1081 {
1082 int i, n;
1083 unsigned int b;
1084 size_t soutl;
1085 int ret;
1086 int blocksize;
1087
1088 if (outl != NULL) {
1089 *outl = 0;
1090 } else {
1091 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
1092 return 0;
1093 }
1094
1095 /* Prevent accidental use of encryption context when decrypting */
1096 if (ctx->encrypt) {
1097 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
1098 return 0;
1099 }
1100
1101 if (ctx->cipher == NULL) {
1102 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
1103 return 0;
1104 }
1105
1106 if (ctx->cipher->prov == NULL)
1107 goto legacy;
1108
1109 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
1110
1111 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
1112 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
1113 return 0;
1114 }
1115
1116 ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
1117 blocksize == 1 ? 0 : blocksize);
1118
1119 if (ret) {
1120 if (soutl > INT_MAX) {
1121 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
1122 return 0;
1123 }
1124 *outl = soutl;
1125 }
1126
1127 return ret;
1128
1129 /* Code below to be removed when legacy support is dropped. */
1130 legacy:
1131
1132 *outl = 0;
1133 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
1134 i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
1135 if (i < 0)
1136 return 0;
1137 else
1138 *outl = i;
1139 return 1;
1140 }
1141
1142 b = ctx->cipher->block_size;
1143 if (ctx->flags & EVP_CIPH_NO_PADDING) {
1144 if (ctx->buf_len) {
1145 ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
1146 return 0;
1147 }
1148 *outl = 0;
1149 return 1;
1150 }
1151 if (b > 1) {
1152 if (ctx->buf_len || !ctx->final_used) {
1153 ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
1154 return 0;
1155 }
1156 OPENSSL_assert(b <= sizeof(ctx->final));
1157
1158 /*
1159 * The following assumes that the ciphertext has been authenticated.
1160 * Otherwise it provides a padding oracle.
1161 */
1162 n = ctx->final[b - 1];
1163 if (n == 0 || n > (int)b) {
1164 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
1165 return 0;
1166 }
1167 for (i = 0; i < n; i++) {
1168 if (ctx->final[--b] != n) {
1169 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
1170 return 0;
1171 }
1172 }
1173 n = ctx->cipher->block_size - n;
1174 for (i = 0; i < n; i++)
1175 out[i] = ctx->final[i];
1176 *outl = n;
1177 }
1178 return 1;
1179 }
1180
EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX * c,int keylen)1181 int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
1182 {
1183 if (c->cipher->prov != NULL) {
1184 int ok;
1185 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1186 size_t len;
1187
1188 if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
1189 return 1;
1190
1191 /* Check the cipher actually understands this parameter */
1192 if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher),
1193 OSSL_CIPHER_PARAM_KEYLEN) == NULL) {
1194 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
1195 return 0;
1196 }
1197
1198 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
1199 if (!OSSL_PARAM_set_int(params, keylen))
1200 return 0;
1201 ok = evp_do_ciph_ctx_setparams(c->cipher, c->algctx, params);
1202 if (ok <= 0)
1203 return 0;
1204 c->key_len = keylen;
1205 return 1;
1206 }
1207
1208 /* Code below to be removed when legacy support is dropped. */
1209
1210 /*
1211 * Note there have never been any built-in ciphers that define this flag
1212 * since it was first introduced.
1213 */
1214 if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
1215 return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
1216 if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
1217 return 1;
1218 if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
1219 c->key_len = keylen;
1220 return 1;
1221 }
1222 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
1223 return 0;
1224 }
1225
EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX * ctx,int pad)1226 int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
1227 {
1228 int ok;
1229 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1230 unsigned int pd = pad;
1231
1232 if (pad)
1233 ctx->flags &= ~EVP_CIPH_NO_PADDING;
1234 else
1235 ctx->flags |= EVP_CIPH_NO_PADDING;
1236
1237 if (ctx->cipher != NULL && ctx->cipher->prov == NULL)
1238 return 1;
1239 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd);
1240 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1241
1242 return ok != 0;
1243 }
1244
EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX * ctx,int type,int arg,void * ptr)1245 int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1246 {
1247 int ret = EVP_CTRL_RET_UNSUPPORTED;
1248 int set_params = 1;
1249 size_t sz = arg;
1250 unsigned int i;
1251 OSSL_PARAM params[4] = {
1252 OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
1253 };
1254
1255 if (ctx == NULL || ctx->cipher == NULL) {
1256 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
1257 return 0;
1258 }
1259
1260 if (ctx->cipher->prov == NULL)
1261 goto legacy;
1262
1263 switch (type) {
1264 case EVP_CTRL_SET_KEY_LENGTH:
1265 if (arg < 0)
1266 return 0;
1267 if (ctx->key_len == arg)
1268 /* Skip calling into provider if unchanged. */
1269 return 1;
1270 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz);
1271 ctx->key_len = -1;
1272 break;
1273 case EVP_CTRL_RAND_KEY: /* Used by DES */
1274 set_params = 0;
1275 params[0] =
1276 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY,
1277 ptr, sz);
1278 break;
1279
1280 case EVP_CTRL_INIT:
1281 /*
1282 * EVP_CTRL_INIT is purely legacy, no provider counterpart.
1283 * As a matter of fact, this should be dead code, but some caller
1284 * might still do a direct control call with this command, so...
1285 * Legacy methods return 1 except for exceptional circumstances, so
1286 * we do the same here to not be disruptive.
1287 */
1288 return 1;
1289 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */
1290 default:
1291 goto end;
1292 case EVP_CTRL_AEAD_SET_IVLEN:
1293 if (arg < 0)
1294 return 0;
1295 if (ctx->iv_len == arg)
1296 /* Skip calling into provider if unchanged. */
1297 return 1;
1298 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1299 ctx->iv_len = -1;
1300 break;
1301 case EVP_CTRL_CCM_SET_L:
1302 if (arg < 2 || arg > 8)
1303 return 0;
1304 sz = 15 - arg;
1305 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1306 ctx->iv_len = -1;
1307 break;
1308 case EVP_CTRL_AEAD_SET_IV_FIXED:
1309 params[0] = OSSL_PARAM_construct_octet_string(
1310 OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz);
1311 break;
1312 case EVP_CTRL_GCM_IV_GEN:
1313 set_params = 0;
1314 if (arg < 0)
1315 sz = 0; /* special case that uses the iv length */
1316 params[0] = OSSL_PARAM_construct_octet_string(
1317 OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz);
1318 break;
1319 case EVP_CTRL_GCM_SET_IV_INV:
1320 if (arg < 0)
1321 return 0;
1322 params[0] = OSSL_PARAM_construct_octet_string(
1323 OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz);
1324 break;
1325 case EVP_CTRL_GET_RC5_ROUNDS:
1326 set_params = 0; /* Fall thru */
1327 case EVP_CTRL_SET_RC5_ROUNDS:
1328 if (arg < 0)
1329 return 0;
1330 i = (unsigned int)arg;
1331 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i);
1332 break;
1333 case EVP_CTRL_SET_SPEED:
1334 if (arg < 0)
1335 return 0;
1336 i = (unsigned int)arg;
1337 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i);
1338 break;
1339 case EVP_CTRL_AEAD_GET_TAG:
1340 set_params = 0; /* Fall thru */
1341 case EVP_CTRL_AEAD_SET_TAG:
1342 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
1343 ptr, sz);
1344 break;
1345 case EVP_CTRL_AEAD_TLS1_AAD:
1346 /* This one does a set and a get - since it returns a size */
1347 params[0] =
1348 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD,
1349 ptr, sz);
1350 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1351 if (ret <= 0)
1352 goto end;
1353 params[0] =
1354 OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz);
1355 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1356 if (ret <= 0)
1357 goto end;
1358 return sz;
1359 #ifndef OPENSSL_NO_RC2
1360 case EVP_CTRL_GET_RC2_KEY_BITS:
1361 set_params = 0; /* Fall thru */
1362 case EVP_CTRL_SET_RC2_KEY_BITS:
1363 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz);
1364 break;
1365 #endif /* OPENSSL_NO_RC2 */
1366 #if !defined(OPENSSL_NO_MULTIBLOCK)
1367 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
1368 params[0] = OSSL_PARAM_construct_size_t(
1369 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz);
1370 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1371 if (ret <= 0)
1372 return 0;
1373
1374 params[0] = OSSL_PARAM_construct_size_t(
1375 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz);
1376 params[1] = OSSL_PARAM_construct_end();
1377 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1378 if (ret <= 0)
1379 return 0;
1380 return sz;
1381 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: {
1382 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1383 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1384
1385 if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
1386 return 0;
1387
1388 params[0] = OSSL_PARAM_construct_octet_string(
1389 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len);
1390 params[1] = OSSL_PARAM_construct_uint(
1391 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1392 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1393 if (ret <= 0)
1394 return ret;
1395 /* Retrieve the return values changed by the set */
1396 params[0] = OSSL_PARAM_construct_size_t(
1397 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz);
1398 params[1] = OSSL_PARAM_construct_uint(
1399 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1400 params[2] = OSSL_PARAM_construct_end();
1401 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1402 if (ret <= 0)
1403 return 0;
1404 return sz;
1405 }
1406 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: {
1407 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1408 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1409
1410 params[0] = OSSL_PARAM_construct_octet_string(
1411 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len);
1412
1413 params[1] = OSSL_PARAM_construct_octet_string(
1414 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp,
1415 p->len);
1416 params[2] = OSSL_PARAM_construct_uint(
1417 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1418 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1419 if (ret <= 0)
1420 return ret;
1421 params[0] = OSSL_PARAM_construct_size_t(
1422 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz);
1423 params[1] = OSSL_PARAM_construct_end();
1424 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1425 if (ret <= 0)
1426 return 0;
1427 return sz;
1428 }
1429 #endif /* OPENSSL_NO_MULTIBLOCK */
1430 case EVP_CTRL_AEAD_SET_MAC_KEY:
1431 if (arg < 0)
1432 return -1;
1433 params[0] = OSSL_PARAM_construct_octet_string(
1434 OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz);
1435 break;
1436 }
1437
1438 if (set_params)
1439 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1440 else
1441 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1442 goto end;
1443
1444 /* Code below to be removed when legacy support is dropped. */
1445 legacy:
1446 if (ctx->cipher->ctrl == NULL) {
1447 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
1448 return 0;
1449 }
1450
1451 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
1452
1453 end:
1454 if (ret == EVP_CTRL_RET_UNSUPPORTED) {
1455 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
1456 return 0;
1457 }
1458 return ret;
1459 }
1460
EVP_CIPHER_get_params(EVP_CIPHER * cipher,OSSL_PARAM params[])1461 int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[])
1462 {
1463 if (cipher != NULL && cipher->get_params != NULL)
1464 return cipher->get_params(params);
1465 return 0;
1466 }
1467
EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX * ctx,const OSSL_PARAM params[])1468 int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[])
1469 {
1470 int r = 0;
1471 const OSSL_PARAM *p;
1472
1473 if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) {
1474 r = ctx->cipher->set_ctx_params(ctx->algctx, params);
1475 if (r > 0) {
1476 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
1477 if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->key_len)) {
1478 r = 0;
1479 ctx->key_len = -1;
1480 }
1481 }
1482 if (r > 0) {
1483 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN);
1484 if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->iv_len)) {
1485 r = 0;
1486 ctx->iv_len = -1;
1487 }
1488 }
1489 }
1490 return r;
1491 }
1492
EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX * ctx,OSSL_PARAM params[])1493 int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[])
1494 {
1495 if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL)
1496 return ctx->cipher->get_ctx_params(ctx->algctx, params);
1497 return 0;
1498 }
1499
EVP_CIPHER_gettable_params(const EVP_CIPHER * cipher)1500 const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher)
1501 {
1502 if (cipher != NULL && cipher->gettable_params != NULL)
1503 return cipher->gettable_params(
1504 ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)));
1505 return NULL;
1506 }
1507
EVP_CIPHER_settable_ctx_params(const EVP_CIPHER * cipher)1508 const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher)
1509 {
1510 void *provctx;
1511
1512 if (cipher != NULL && cipher->settable_ctx_params != NULL) {
1513 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
1514 return cipher->settable_ctx_params(NULL, provctx);
1515 }
1516 return NULL;
1517 }
1518
EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER * cipher)1519 const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher)
1520 {
1521 void *provctx;
1522
1523 if (cipher != NULL && cipher->gettable_ctx_params != NULL) {
1524 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
1525 return cipher->gettable_ctx_params(NULL, provctx);
1526 }
1527 return NULL;
1528 }
1529
EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX * cctx)1530 const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx)
1531 {
1532 void *alg;
1533
1534 if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) {
1535 alg = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
1536 return cctx->cipher->settable_ctx_params(cctx->algctx, alg);
1537 }
1538 return NULL;
1539 }
1540
EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX * cctx)1541 const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx)
1542 {
1543 void *provctx;
1544
1545 if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) {
1546 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
1547 return cctx->cipher->gettable_ctx_params(cctx->algctx, provctx);
1548 }
1549 return NULL;
1550 }
1551
1552 #ifndef FIPS_MODULE
EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX * ctx)1553 static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx)
1554 {
1555 const EVP_CIPHER *cipher = ctx->cipher;
1556 const OSSL_PROVIDER *prov;
1557
1558 if (cipher == NULL)
1559 return NULL;
1560
1561 prov = EVP_CIPHER_get0_provider(cipher);
1562 return ossl_provider_libctx(prov);
1563 }
1564 #endif
1565
EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX * ctx,unsigned char * key)1566 int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
1567 {
1568 if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
1569 return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
1570
1571 #ifdef FIPS_MODULE
1572 return 0;
1573 #else
1574 {
1575 int kl;
1576 OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx);
1577
1578 kl = EVP_CIPHER_CTX_get_key_length(ctx);
1579 if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl, 0) <= 0)
1580 return 0;
1581 return 1;
1582 }
1583 #endif /* FIPS_MODULE */
1584 }
1585
EVP_CIPHER_CTX_dup(const EVP_CIPHER_CTX * in)1586 EVP_CIPHER_CTX *EVP_CIPHER_CTX_dup(const EVP_CIPHER_CTX *in)
1587 {
1588 EVP_CIPHER_CTX *out = EVP_CIPHER_CTX_new();
1589
1590 if (out != NULL && !EVP_CIPHER_CTX_copy(out, in)) {
1591 EVP_CIPHER_CTX_free(out);
1592 out = NULL;
1593 }
1594 return out;
1595 }
1596
EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX * out,const EVP_CIPHER_CTX * in)1597 int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
1598 {
1599 if ((in == NULL) || (in->cipher == NULL)) {
1600 ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED);
1601 return 0;
1602 }
1603
1604 if (in->cipher->prov == NULL)
1605 goto legacy;
1606
1607 if (in->cipher->dupctx == NULL) {
1608 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
1609 return 0;
1610 }
1611
1612 EVP_CIPHER_CTX_reset(out);
1613
1614 *out = *in;
1615 out->algctx = NULL;
1616
1617 if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) {
1618 out->fetched_cipher = NULL;
1619 return 0;
1620 }
1621
1622 out->algctx = in->cipher->dupctx(in->algctx);
1623 if (out->algctx == NULL) {
1624 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
1625 return 0;
1626 }
1627
1628 return 1;
1629
1630 /* Code below to be removed when legacy support is dropped. */
1631 legacy:
1632
1633 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
1634 /* Make sure it's safe to copy a cipher context using an ENGINE */
1635 if (in->engine && !ENGINE_init(in->engine)) {
1636 ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB);
1637 return 0;
1638 }
1639 #endif
1640
1641 EVP_CIPHER_CTX_reset(out);
1642 memcpy(out, in, sizeof(*out));
1643
1644 if (in->cipher_data && in->cipher->ctx_size) {
1645 out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
1646 if (out->cipher_data == NULL) {
1647 out->cipher = NULL;
1648 return 0;
1649 }
1650 memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
1651 }
1652
1653 if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
1654 if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
1655 out->cipher = NULL;
1656 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
1657 return 0;
1658 }
1659 return 1;
1660 }
1661
evp_cipher_new(void)1662 EVP_CIPHER *evp_cipher_new(void)
1663 {
1664 EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
1665
1666 if (cipher != NULL && !CRYPTO_NEW_REF(&cipher->refcnt, 1)) {
1667 OPENSSL_free(cipher);
1668 return NULL;
1669 }
1670 return cipher;
1671 }
1672
1673 /*
1674 * FIPS module note: since internal fetches will be entirely
1675 * provider based, we know that none of its code depends on legacy
1676 * NIDs or any functionality that use them.
1677 */
1678 #ifndef FIPS_MODULE
1679 /* After removal of legacy support get rid of the need for legacy NIDs */
set_legacy_nid(const char * name,void * vlegacy_nid)1680 static void set_legacy_nid(const char *name, void *vlegacy_nid)
1681 {
1682 int nid;
1683 int *legacy_nid = vlegacy_nid;
1684 /*
1685 * We use lowest level function to get the associated method, because
1686 * higher level functions such as EVP_get_cipherbyname() have changed
1687 * to look at providers too.
1688 */
1689 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
1690
1691 if (*legacy_nid == -1) /* We found a clash already */
1692 return;
1693 if (legacy_method == NULL)
1694 return;
1695 nid = EVP_CIPHER_get_nid(legacy_method);
1696 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
1697 *legacy_nid = -1;
1698 return;
1699 }
1700 *legacy_nid = nid;
1701 }
1702 #endif
1703
evp_cipher_from_algorithm(const int name_id,const OSSL_ALGORITHM * algodef,OSSL_PROVIDER * prov)1704 static void *evp_cipher_from_algorithm(const int name_id,
1705 const OSSL_ALGORITHM *algodef,
1706 OSSL_PROVIDER *prov)
1707 {
1708 const OSSL_DISPATCH *fns = algodef->implementation;
1709 EVP_CIPHER *cipher = NULL;
1710 int fnciphcnt = 0, fnpipecnt = 0, fnctxcnt = 0;
1711
1712 if ((cipher = evp_cipher_new()) == NULL) {
1713 ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB);
1714 return NULL;
1715 }
1716
1717 #ifndef FIPS_MODULE
1718 cipher->nid = NID_undef;
1719 if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid)
1720 || cipher->nid == -1) {
1721 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1722 EVP_CIPHER_free(cipher);
1723 return NULL;
1724 }
1725 #endif
1726
1727 cipher->name_id = name_id;
1728 if ((cipher->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
1729 EVP_CIPHER_free(cipher);
1730 return NULL;
1731 }
1732 cipher->description = algodef->algorithm_description;
1733
1734 for (; fns->function_id != 0; fns++) {
1735 switch (fns->function_id) {
1736 case OSSL_FUNC_CIPHER_NEWCTX:
1737 if (cipher->newctx != NULL)
1738 break;
1739 cipher->newctx = OSSL_FUNC_cipher_newctx(fns);
1740 fnctxcnt++;
1741 break;
1742 case OSSL_FUNC_CIPHER_ENCRYPT_INIT:
1743 if (cipher->einit != NULL)
1744 break;
1745 cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns);
1746 fnciphcnt++;
1747 break;
1748 case OSSL_FUNC_CIPHER_DECRYPT_INIT:
1749 if (cipher->dinit != NULL)
1750 break;
1751 cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns);
1752 fnciphcnt++;
1753 break;
1754 case OSSL_FUNC_CIPHER_UPDATE:
1755 if (cipher->cupdate != NULL)
1756 break;
1757 cipher->cupdate = OSSL_FUNC_cipher_update(fns);
1758 fnciphcnt++;
1759 break;
1760 case OSSL_FUNC_CIPHER_FINAL:
1761 if (cipher->cfinal != NULL)
1762 break;
1763 cipher->cfinal = OSSL_FUNC_cipher_final(fns);
1764 fnciphcnt++;
1765 break;
1766 case OSSL_FUNC_CIPHER_CIPHER:
1767 if (cipher->ccipher != NULL)
1768 break;
1769 cipher->ccipher = OSSL_FUNC_cipher_cipher(fns);
1770 break;
1771 case OSSL_FUNC_CIPHER_PIPELINE_ENCRYPT_INIT:
1772 if (cipher->p_einit != NULL)
1773 break;
1774 cipher->p_einit = OSSL_FUNC_cipher_pipeline_encrypt_init(fns);
1775 fnpipecnt++;
1776 break;
1777 case OSSL_FUNC_CIPHER_PIPELINE_DECRYPT_INIT:
1778 if (cipher->p_dinit != NULL)
1779 break;
1780 cipher->p_dinit = OSSL_FUNC_cipher_pipeline_decrypt_init(fns);
1781 fnpipecnt++;
1782 break;
1783 case OSSL_FUNC_CIPHER_PIPELINE_UPDATE:
1784 if (cipher->p_cupdate != NULL)
1785 break;
1786 cipher->p_cupdate = OSSL_FUNC_cipher_pipeline_update(fns);
1787 fnpipecnt++;
1788 break;
1789 case OSSL_FUNC_CIPHER_PIPELINE_FINAL:
1790 if (cipher->p_cfinal != NULL)
1791 break;
1792 cipher->p_cfinal = OSSL_FUNC_cipher_pipeline_final(fns);
1793 fnpipecnt++;
1794 break;
1795 case OSSL_FUNC_CIPHER_FREECTX:
1796 if (cipher->freectx != NULL)
1797 break;
1798 cipher->freectx = OSSL_FUNC_cipher_freectx(fns);
1799 fnctxcnt++;
1800 break;
1801 case OSSL_FUNC_CIPHER_DUPCTX:
1802 if (cipher->dupctx != NULL)
1803 break;
1804 cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns);
1805 break;
1806 case OSSL_FUNC_CIPHER_GET_PARAMS:
1807 if (cipher->get_params != NULL)
1808 break;
1809 cipher->get_params = OSSL_FUNC_cipher_get_params(fns);
1810 break;
1811 case OSSL_FUNC_CIPHER_GET_CTX_PARAMS:
1812 if (cipher->get_ctx_params != NULL)
1813 break;
1814 cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns);
1815 break;
1816 case OSSL_FUNC_CIPHER_SET_CTX_PARAMS:
1817 if (cipher->set_ctx_params != NULL)
1818 break;
1819 cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns);
1820 break;
1821 case OSSL_FUNC_CIPHER_GETTABLE_PARAMS:
1822 if (cipher->gettable_params != NULL)
1823 break;
1824 cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns);
1825 break;
1826 case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS:
1827 if (cipher->gettable_ctx_params != NULL)
1828 break;
1829 cipher->gettable_ctx_params =
1830 OSSL_FUNC_cipher_gettable_ctx_params(fns);
1831 break;
1832 case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS:
1833 if (cipher->settable_ctx_params != NULL)
1834 break;
1835 cipher->settable_ctx_params =
1836 OSSL_FUNC_cipher_settable_ctx_params(fns);
1837 break;
1838 }
1839 }
1840 if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4)
1841 || (fnciphcnt == 0 && cipher->ccipher == NULL && fnpipecnt == 0)
1842 || (fnpipecnt != 0 && (fnpipecnt < 3 || cipher->p_cupdate == NULL
1843 || cipher->p_cfinal == NULL))
1844 || fnctxcnt != 2) {
1845 /*
1846 * In order to be a consistent set of functions we must have at least
1847 * a complete set of "encrypt" functions, or a complete set of "decrypt"
1848 * functions, or a single "cipher" function. In all cases we need both
1849 * the "newctx" and "freectx" functions.
1850 */
1851 EVP_CIPHER_free(cipher);
1852 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1853 return NULL;
1854 }
1855 cipher->prov = prov;
1856 if (prov != NULL)
1857 ossl_provider_up_ref(prov);
1858
1859 if (!evp_cipher_cache_constants(cipher)) {
1860 EVP_CIPHER_free(cipher);
1861 ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED);
1862 cipher = NULL;
1863 }
1864
1865 return cipher;
1866 }
1867
evp_cipher_up_ref(void * cipher)1868 static int evp_cipher_up_ref(void *cipher)
1869 {
1870 return EVP_CIPHER_up_ref(cipher);
1871 }
1872
evp_cipher_free(void * cipher)1873 static void evp_cipher_free(void *cipher)
1874 {
1875 EVP_CIPHER_free(cipher);
1876 }
1877
EVP_CIPHER_fetch(OSSL_LIB_CTX * ctx,const char * algorithm,const char * properties)1878 EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
1879 const char *properties)
1880 {
1881 EVP_CIPHER *cipher =
1882 evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties,
1883 evp_cipher_from_algorithm, evp_cipher_up_ref,
1884 evp_cipher_free);
1885
1886 return cipher;
1887 }
1888
EVP_CIPHER_can_pipeline(const EVP_CIPHER * cipher,int enc)1889 int EVP_CIPHER_can_pipeline(const EVP_CIPHER *cipher, int enc)
1890 {
1891 if (((enc && cipher->p_einit != NULL) || (!enc && cipher->p_dinit != NULL))
1892 && cipher->p_cupdate != NULL && cipher->p_cfinal != NULL)
1893 return 1;
1894
1895 return 0;
1896 }
1897
EVP_CIPHER_up_ref(EVP_CIPHER * cipher)1898 int EVP_CIPHER_up_ref(EVP_CIPHER *cipher)
1899 {
1900 int ref = 0;
1901
1902 if (cipher->origin == EVP_ORIG_DYNAMIC)
1903 CRYPTO_UP_REF(&cipher->refcnt, &ref);
1904 return 1;
1905 }
1906
evp_cipher_free_int(EVP_CIPHER * cipher)1907 void evp_cipher_free_int(EVP_CIPHER *cipher)
1908 {
1909 OPENSSL_free(cipher->type_name);
1910 ossl_provider_free(cipher->prov);
1911 CRYPTO_FREE_REF(&cipher->refcnt);
1912 OPENSSL_free(cipher);
1913 }
1914
EVP_CIPHER_free(EVP_CIPHER * cipher)1915 void EVP_CIPHER_free(EVP_CIPHER *cipher)
1916 {
1917 int i;
1918
1919 if (cipher == NULL || cipher->origin != EVP_ORIG_DYNAMIC)
1920 return;
1921
1922 CRYPTO_DOWN_REF(&cipher->refcnt, &i);
1923 if (i > 0)
1924 return;
1925 evp_cipher_free_int(cipher);
1926 }
1927
EVP_CIPHER_do_all_provided(OSSL_LIB_CTX * libctx,void (* fn)(EVP_CIPHER * mac,void * arg),void * arg)1928 void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx,
1929 void (*fn)(EVP_CIPHER *mac, void *arg),
1930 void *arg)
1931 {
1932 evp_generic_do_all(libctx, OSSL_OP_CIPHER,
1933 (void (*)(void *, void *))fn, arg,
1934 evp_cipher_from_algorithm, evp_cipher_up_ref,
1935 evp_cipher_free);
1936 }
1937
