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