2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
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
10 /* We need to use some engine deprecated APIs */
11 #define OPENSSL_SUPPRESS_DEPRECATED
16 #include "internal/cryptlib.h"
17 #include <openssl/evp.h>
18 #include <openssl/err.h>
19 #include <openssl/rand.h>
20 #include <openssl/engine.h>
21 #include <openssl/params.h>
22 #include <openssl/core_names.h>
23 #include "crypto/evp.h"
24 #include "internal/provider.h"
25 #include "evp_local.h"
27 int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx)
32 if (ctx->cipher == NULL || ctx->cipher->prov == NULL)
35 if (ctx->provctx != NULL) {
36 if (ctx->cipher->freectx != NULL)
37 ctx->cipher->freectx(ctx->provctx);
40 if (ctx->fetched_cipher != NULL)
41 EVP_CIPHER_free(ctx->fetched_cipher);
42 memset(ctx, 0, sizeof(*ctx));
46 /* Remove legacy code below when legacy support is removed. */
49 if (ctx->cipher != NULL) {
50 if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx))
52 /* Cleanse cipher context data */
53 if (ctx->cipher_data && ctx->cipher->ctx_size)
54 OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size);
56 OPENSSL_free(ctx->cipher_data);
57 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
58 ENGINE_finish(ctx->engine);
60 memset(ctx, 0, sizeof(*ctx));
64 EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
66 return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX));
69 void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
71 EVP_CIPHER_CTX_reset(ctx);
75 static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx,
76 const EVP_CIPHER *cipher,
77 ENGINE *impl, const unsigned char *key,
78 const unsigned char *iv, int enc,
79 const OSSL_PARAM params[])
81 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
82 ENGINE *tmpimpl = NULL;
85 * enc == 1 means we are encrypting.
86 * enc == 0 means we are decrypting.
87 * enc == -1 means, use the previously initialised value for encrypt/decrypt
97 if (cipher == NULL && ctx->cipher == NULL) {
98 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
102 /* Code below to be removed when legacy support is dropped. */
104 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
106 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
107 * this context may already have an ENGINE! Try to avoid releasing the
108 * previous handle, re-querying for an ENGINE, and having a
109 * reinitialisation, when it may all be unnecessary.
111 if (ctx->engine && ctx->cipher
112 && (cipher == NULL || cipher->nid == ctx->cipher->nid))
115 if (cipher != NULL && impl == NULL) {
116 /* Ask if an ENGINE is reserved for this job */
117 tmpimpl = ENGINE_get_cipher_engine(cipher->nid);
122 * If there are engines involved then we should use legacy handling for now.
124 if (ctx->engine != NULL
125 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
129 if (ctx->cipher == ctx->fetched_cipher)
131 EVP_CIPHER_free(ctx->fetched_cipher);
132 ctx->fetched_cipher = NULL;
136 * Ensure a context left lying around from last time is cleared
139 if (cipher != NULL && ctx->cipher != NULL) {
140 OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size);
141 ctx->cipher_data = NULL;
145 /* Start of non-legacy code below */
147 /* Ensure a context left lying around from last time is cleared */
148 if (cipher != NULL && ctx->cipher != NULL) {
149 unsigned long flags = ctx->flags;
151 EVP_CIPHER_CTX_reset(ctx);
152 /* Restore encrypt and flags */
158 cipher = ctx->cipher;
160 if (cipher->prov == NULL) {
162 /* We only do explicit fetches inside the FIPS module */
163 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
166 EVP_CIPHER *provciph =
167 EVP_CIPHER_fetch(NULL,
168 cipher->nid == NID_undef ? "NULL"
169 : OBJ_nid2sn(cipher->nid),
172 if (provciph == NULL)
175 EVP_CIPHER_free(ctx->fetched_cipher);
176 ctx->fetched_cipher = provciph;
180 if (cipher->prov != NULL) {
181 if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) {
182 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
185 EVP_CIPHER_free(ctx->fetched_cipher);
186 ctx->fetched_cipher = (EVP_CIPHER *)cipher;
188 ctx->cipher = cipher;
189 if (ctx->provctx == NULL) {
190 ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov));
191 if (ctx->provctx == NULL) {
192 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
197 if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) {
199 * If this ctx was already set up for no padding then we need to tell
200 * the new cipher about it.
202 if (!EVP_CIPHER_CTX_set_padding(ctx, 0))
207 if (ctx->cipher->einit == NULL) {
208 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
212 return ctx->cipher->einit(ctx->provctx,
215 : EVP_CIPHER_CTX_key_length(ctx),
218 : EVP_CIPHER_CTX_iv_length(ctx),
222 if (ctx->cipher->dinit == NULL) {
223 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
227 return ctx->cipher->dinit(ctx->provctx,
230 : EVP_CIPHER_CTX_key_length(ctx),
233 : EVP_CIPHER_CTX_iv_length(ctx),
236 /* Code below to be removed when legacy support is dropped. */
239 if (cipher != NULL) {
241 * Ensure a context left lying around from last time is cleared (we
242 * previously attempted to avoid this if the same ENGINE and
243 * EVP_CIPHER could be used).
246 unsigned long flags = ctx->flags;
247 EVP_CIPHER_CTX_reset(ctx);
248 /* Restore encrypt and flags */
252 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
254 if (!ENGINE_init(impl)) {
255 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
262 /* There's an ENGINE for this job ... (apparently) */
263 const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
267 * One positive side-effect of US's export control history,
268 * is that we should at least be able to avoid using US
269 * misspellings of "initialisation"?
271 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
274 /* We'll use the ENGINE's private cipher definition */
277 * Store the ENGINE functional reference so we know 'cipher' came
278 * from an ENGINE and we need to release it when done.
286 ctx->cipher = cipher;
287 if (ctx->cipher->ctx_size) {
288 ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
289 if (ctx->cipher_data == NULL) {
291 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
295 ctx->cipher_data = NULL;
297 ctx->key_len = cipher->key_len;
298 /* Preserve wrap enable flag, zero everything else */
299 ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
300 if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
301 if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
303 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
308 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
311 if (ctx->cipher == NULL)
314 /* we assume block size is a power of 2 in *cryptUpdate */
315 OPENSSL_assert(ctx->cipher->block_size == 1
316 || ctx->cipher->block_size == 8
317 || ctx->cipher->block_size == 16);
319 if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
320 && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) {
321 ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED);
325 if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) {
326 switch (EVP_CIPHER_CTX_mode(ctx)) {
328 case EVP_CIPH_STREAM_CIPHER:
329 case EVP_CIPH_ECB_MODE:
332 case EVP_CIPH_CFB_MODE:
333 case EVP_CIPH_OFB_MODE:
338 case EVP_CIPH_CBC_MODE:
340 OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <=
341 (int)sizeof(ctx->iv));
343 memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
344 memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
347 case EVP_CIPH_CTR_MODE:
349 /* Don't reuse IV for CTR mode */
351 memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx));
359 if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
360 if (!ctx->cipher->init(ctx, key, iv, enc))
365 ctx->block_mask = ctx->cipher->block_size - 1;
369 int EVP_CipherInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
370 const unsigned char *key, const unsigned char *iv,
371 int enc, const OSSL_PARAM params[])
373 return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, params);
376 int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
377 const unsigned char *key, const unsigned char *iv, int enc)
380 EVP_CIPHER_CTX_reset(ctx);
381 return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, NULL);
384 int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
385 ENGINE *impl, const unsigned char *key,
386 const unsigned char *iv, int enc)
388 return evp_cipher_init_internal(ctx, cipher, impl, key, iv, enc, NULL);
391 int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
392 const unsigned char *in, int inl)
395 return EVP_EncryptUpdate(ctx, out, outl, in, inl);
397 return EVP_DecryptUpdate(ctx, out, outl, in, inl);
400 int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
403 return EVP_EncryptFinal_ex(ctx, out, outl);
405 return EVP_DecryptFinal_ex(ctx, out, outl);
408 int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
411 return EVP_EncryptFinal(ctx, out, outl);
413 return EVP_DecryptFinal(ctx, out, outl);
416 int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
417 const unsigned char *key, const unsigned char *iv)
419 return EVP_CipherInit(ctx, cipher, key, iv, 1);
422 int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
423 ENGINE *impl, const unsigned char *key,
424 const unsigned char *iv)
426 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
429 int EVP_EncryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
430 const unsigned char *key, const unsigned char *iv,
431 const OSSL_PARAM params[])
433 return EVP_CipherInit_ex2(ctx, cipher, key, iv, 1, params);
436 int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
437 const unsigned char *key, const unsigned char *iv)
439 return EVP_CipherInit(ctx, cipher, key, iv, 0);
442 int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
443 ENGINE *impl, const unsigned char *key,
444 const unsigned char *iv)
446 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
449 int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
450 const unsigned char *key, const unsigned char *iv,
451 const OSSL_PARAM params[])
453 return EVP_CipherInit_ex2(ctx, cipher, key, iv, 0, params);
457 * According to the letter of standard difference between pointers
458 * is specified to be valid only within same object. This makes
459 * it formally challenging to determine if input and output buffers
460 * are not partially overlapping with standard pointer arithmetic.
465 #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64
467 * Then we have VMS that distinguishes itself by adhering to
468 * sizeof(size_t)==4 even in 64-bit builds, which means that
469 * difference between two pointers might be truncated to 32 bits.
470 * In the context one can even wonder how comparison for
471 * equality is implemented. To be on the safe side we adhere to
472 * PTRDIFF_T even for comparison for equality.
474 # define PTRDIFF_T uint64_t
476 # define PTRDIFF_T size_t
479 int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
481 PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2;
483 * Check for partially overlapping buffers. [Binary logical
484 * operations are used instead of boolean to minimize number
485 * of conditional branches.]
487 int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) |
488 (diff > (0 - (PTRDIFF_T)len)));
493 static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
494 unsigned char *out, int *outl,
495 const unsigned char *in, int inl)
497 int i, j, bl, cmpl = inl;
499 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
500 cmpl = (cmpl + 7) / 8;
502 bl = ctx->cipher->block_size;
504 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
505 /* If block size > 1 then the cipher will have to do this check */
506 if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
507 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
511 i = ctx->cipher->do_cipher(ctx, out, in, inl);
523 if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
524 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
528 if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) {
529 if (ctx->cipher->do_cipher(ctx, out, in, inl)) {
538 OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
541 memcpy(&(ctx->buf[i]), in, inl);
549 * Once we've processed the first j bytes from in, the amount of
550 * data left that is a multiple of the block length is:
551 * (inl - j) & ~(bl - 1)
552 * We must ensure that this amount of data, plus the one block that
553 * we process from ctx->buf does not exceed INT_MAX
555 if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) {
556 ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
559 memcpy(&(ctx->buf[i]), in, j);
562 if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
572 if (!ctx->cipher->do_cipher(ctx, out, in, inl))
578 memcpy(ctx->buf, &(in[inl]), i);
584 int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
585 const unsigned char *in, int inl)
594 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
598 /* Prevent accidental use of decryption context when encrypting */
600 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
604 if (ctx->cipher == NULL) {
605 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
609 if (ctx->cipher->prov == NULL)
612 blocksize = ctx->cipher->block_size;
614 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
615 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
618 ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl,
619 inl + (blocksize == 1 ? 0 : blocksize), in,
623 if (soutl > INT_MAX) {
624 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
632 /* Code below to be removed when legacy support is dropped. */
635 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
638 int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
641 ret = EVP_EncryptFinal_ex(ctx, out, outl);
645 int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
648 unsigned int i, b, bl;
655 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
659 /* Prevent accidental use of decryption context when encrypting */
661 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
665 if (ctx->cipher == NULL) {
666 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
669 if (ctx->cipher->prov == NULL)
672 blocksize = EVP_CIPHER_CTX_block_size(ctx);
674 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
675 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
679 ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl,
680 blocksize == 1 ? 0 : blocksize);
683 if (soutl > INT_MAX) {
684 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
692 /* Code below to be removed when legacy support is dropped. */
695 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
696 ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
704 b = ctx->cipher->block_size;
705 OPENSSL_assert(b <= sizeof(ctx->buf));
711 if (ctx->flags & EVP_CIPH_NO_PADDING) {
713 ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
721 for (i = bl; i < b; i++)
723 ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b);
731 int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
732 const unsigned char *in, int inl)
734 int fix_len, cmpl = inl, ret;
742 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
746 /* Prevent accidental use of encryption context when decrypting */
748 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
752 if (ctx->cipher == NULL) {
753 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
756 if (ctx->cipher->prov == NULL)
759 blocksize = EVP_CIPHER_CTX_block_size(ctx);
761 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
762 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
765 ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl,
766 inl + (blocksize == 1 ? 0 : blocksize), in,
770 if (soutl > INT_MAX) {
771 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
779 /* Code below to be removed when legacy support is dropped. */
782 b = ctx->cipher->block_size;
784 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
785 cmpl = (cmpl + 7) / 8;
787 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
788 if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
789 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
793 fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
807 if (ctx->flags & EVP_CIPH_NO_PADDING)
808 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
810 OPENSSL_assert(b <= sizeof(ctx->final));
812 if (ctx->final_used) {
813 /* see comment about PTRDIFF_T comparison above */
814 if (((PTRDIFF_T)out == (PTRDIFF_T)in)
815 || ossl_is_partially_overlapping(out, in, b)) {
816 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
820 * final_used is only ever set if buf_len is 0. Therefore the maximum
821 * length output we will ever see from evp_EncryptDecryptUpdate is
822 * the maximum multiple of the block length that is <= inl, or just:
824 * Since final_used has been set then the final output length is:
825 * (inl & ~(b - 1)) + b
826 * This must never exceed INT_MAX
828 if ((inl & ~(b - 1)) > INT_MAX - b) {
829 ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
832 memcpy(out, ctx->final, b);
838 if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl))
842 * if we have 'decrypted' a multiple of block size, make sure we have a
843 * copy of this last block
845 if (b > 1 && !ctx->buf_len) {
848 memcpy(ctx->final, &out[*outl], b);
858 int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
861 ret = EVP_DecryptFinal_ex(ctx, out, outl);
865 int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
876 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
880 /* Prevent accidental use of encryption context when decrypting */
882 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
886 if (ctx->cipher == NULL) {
887 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
891 if (ctx->cipher->prov == NULL)
894 blocksize = EVP_CIPHER_CTX_block_size(ctx);
896 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
897 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
901 ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl,
902 blocksize == 1 ? 0 : blocksize);
905 if (soutl > INT_MAX) {
906 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
914 /* Code below to be removed when legacy support is dropped. */
918 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
919 i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
927 b = ctx->cipher->block_size;
928 if (ctx->flags & EVP_CIPH_NO_PADDING) {
930 ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
937 if (ctx->buf_len || !ctx->final_used) {
938 ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
941 OPENSSL_assert(b <= sizeof(ctx->final));
944 * The following assumes that the ciphertext has been authenticated.
945 * Otherwise it provides a padding oracle.
947 n = ctx->final[b - 1];
948 if (n == 0 || n > (int)b) {
949 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
952 for (i = 0; i < n; i++) {
953 if (ctx->final[--b] != n) {
954 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
958 n = ctx->cipher->block_size - n;
959 for (i = 0; i < n; i++)
960 out[i] = ctx->final[i];
967 int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
969 if (c->cipher->prov != NULL) {
971 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
974 if (EVP_CIPHER_CTX_key_length(c) == keylen)
977 /* Check the cipher actually understands this parameter */
978 if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher),
979 OSSL_CIPHER_PARAM_KEYLEN) == NULL)
982 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
983 ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params);
985 return ok > 0 ? 1 : 0;
988 /* Code below to be removed when legacy support is dropped. */
991 * Note there have never been any built-in ciphers that define this flag
992 * since it was first introduced.
994 if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
995 return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
996 if (EVP_CIPHER_CTX_key_length(c) == keylen)
998 if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
1002 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
1006 int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
1009 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1010 unsigned int pd = pad;
1013 ctx->flags &= ~EVP_CIPH_NO_PADDING;
1015 ctx->flags |= EVP_CIPH_NO_PADDING;
1017 if (ctx->cipher != NULL && ctx->cipher->prov == NULL)
1019 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd);
1020 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1025 int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1027 int ret = EVP_CTRL_RET_UNSUPPORTED;
1031 OSSL_PARAM params[4] = {
1032 OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
1035 if (ctx == NULL || ctx->cipher == NULL) {
1036 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
1040 if (ctx->cipher->prov == NULL)
1044 case EVP_CTRL_SET_KEY_LENGTH:
1045 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz);
1047 case EVP_CTRL_RAND_KEY: /* Used by DES */
1050 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY,
1056 * EVP_CTRL_INIT is purely legacy, no provider counterpart.
1057 * As a matter of fact, this should be dead code, but some caller
1058 * might still do a direct control call with this command, so...
1059 * Legacy methods return 1 except for exceptional circumstances, so
1060 * we do the same here to not be disruptive.
1063 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */
1066 case EVP_CTRL_AEAD_SET_IVLEN:
1069 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1071 case EVP_CTRL_AEAD_SET_IV_FIXED:
1072 params[0] = OSSL_PARAM_construct_octet_string(
1073 OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz);
1075 case EVP_CTRL_GCM_IV_GEN:
1078 sz = 0; /* special case that uses the iv length */
1079 params[0] = OSSL_PARAM_construct_octet_string(
1080 OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz);
1082 case EVP_CTRL_GCM_SET_IV_INV:
1085 params[0] = OSSL_PARAM_construct_octet_string(
1086 OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz);
1088 case EVP_CTRL_GET_RC5_ROUNDS:
1089 set_params = 0; /* Fall thru */
1090 case EVP_CTRL_SET_RC5_ROUNDS:
1093 i = (unsigned int)arg;
1094 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i);
1096 case EVP_CTRL_SET_SPEED:
1099 i = (unsigned int)arg;
1100 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i);
1102 case EVP_CTRL_AEAD_GET_TAG:
1103 set_params = 0; /* Fall thru */
1104 case EVP_CTRL_AEAD_SET_TAG:
1105 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
1108 case EVP_CTRL_AEAD_TLS1_AAD:
1109 /* This one does a set and a get - since it returns a size */
1111 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD,
1113 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1117 OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz);
1118 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1122 #ifndef OPENSSL_NO_RC2
1123 case EVP_CTRL_GET_RC2_KEY_BITS:
1124 set_params = 0; /* Fall thru */
1125 case EVP_CTRL_SET_RC2_KEY_BITS:
1126 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz);
1128 #endif /* OPENSSL_NO_RC2 */
1129 #if !defined(OPENSSL_NO_MULTIBLOCK)
1130 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
1131 params[0] = OSSL_PARAM_construct_size_t(
1132 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz);
1133 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1137 params[0] = OSSL_PARAM_construct_size_t(
1138 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz);
1139 params[1] = OSSL_PARAM_construct_end();
1140 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1144 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: {
1145 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1146 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1148 if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
1151 params[0] = OSSL_PARAM_construct_octet_string(
1152 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len);
1153 params[1] = OSSL_PARAM_construct_uint(
1154 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1155 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1158 /* Retrieve the return values changed by the set */
1159 params[0] = OSSL_PARAM_construct_size_t(
1160 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz);
1161 params[1] = OSSL_PARAM_construct_uint(
1162 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1163 params[2] = OSSL_PARAM_construct_end();
1164 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1169 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: {
1170 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1171 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1173 params[0] = OSSL_PARAM_construct_octet_string(
1174 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len);
1176 params[1] = OSSL_PARAM_construct_octet_string(
1177 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp,
1179 params[2] = OSSL_PARAM_construct_uint(
1180 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1181 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1184 params[0] = OSSL_PARAM_construct_size_t(
1185 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz);
1186 params[1] = OSSL_PARAM_construct_end();
1187 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1192 #endif /* OPENSSL_NO_MULTIBLOCK */
1193 case EVP_CTRL_AEAD_SET_MAC_KEY:
1196 params[0] = OSSL_PARAM_construct_octet_string(
1197 OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz);
1202 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1204 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1207 /* Code below to be removed when legacy support is dropped. */
1209 if (ctx->cipher->ctrl == NULL) {
1210 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
1214 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
1217 if (ret == EVP_CTRL_RET_UNSUPPORTED) {
1218 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
1224 int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[])
1226 if (cipher != NULL && cipher->get_params != NULL)
1227 return cipher->get_params(params);
1231 int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[])
1233 if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL)
1234 return ctx->cipher->set_ctx_params(ctx->provctx, params);
1238 int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[])
1240 if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL)
1241 return ctx->cipher->get_ctx_params(ctx->provctx, params);
1245 const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher)
1247 if (cipher != NULL && cipher->gettable_params != NULL)
1248 return cipher->gettable_params(
1249 ossl_provider_ctx(EVP_CIPHER_provider(cipher)));
1253 const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher)
1257 if (cipher != NULL && cipher->settable_ctx_params != NULL) {
1258 alg = ossl_provider_ctx(EVP_CIPHER_provider(cipher));
1259 return cipher->settable_ctx_params(NULL, alg);
1264 const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher)
1268 if (cipher != NULL && cipher->gettable_ctx_params != NULL) {
1269 alg = ossl_provider_ctx(EVP_CIPHER_provider(cipher));
1270 return cipher->gettable_ctx_params(NULL, alg);
1275 const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx)
1279 if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) {
1280 alg = ossl_provider_ctx(EVP_CIPHER_provider(cctx->cipher));
1281 return cctx->cipher->settable_ctx_params(cctx->provctx, alg);
1286 const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx)
1290 if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) {
1291 alg = ossl_provider_ctx(EVP_CIPHER_provider(cctx->cipher));
1292 return cctx->cipher->gettable_ctx_params(cctx->provctx, alg);
1298 static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx)
1300 const EVP_CIPHER *cipher = ctx->cipher;
1301 const OSSL_PROVIDER *prov;
1306 prov = EVP_CIPHER_provider(cipher);
1307 return ossl_provider_libctx(prov);
1311 int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
1313 if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
1314 return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
1321 OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx);
1323 kl = EVP_CIPHER_CTX_key_length(ctx);
1324 if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl) <= 0)
1328 #endif /* FIPS_MODULE */
1331 int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
1333 if ((in == NULL) || (in->cipher == NULL)) {
1334 ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED);
1338 if (in->cipher->prov == NULL)
1341 if (in->cipher->dupctx == NULL) {
1342 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
1346 EVP_CIPHER_CTX_reset(out);
1349 out->provctx = NULL;
1351 if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) {
1352 out->fetched_cipher = NULL;
1356 out->provctx = in->cipher->dupctx(in->provctx);
1357 if (out->provctx == NULL) {
1358 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
1364 /* Code below to be removed when legacy support is dropped. */
1367 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
1368 /* Make sure it's safe to copy a cipher context using an ENGINE */
1369 if (in->engine && !ENGINE_init(in->engine)) {
1370 ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB);
1375 EVP_CIPHER_CTX_reset(out);
1376 memcpy(out, in, sizeof(*out));
1378 if (in->cipher_data && in->cipher->ctx_size) {
1379 out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
1380 if (out->cipher_data == NULL) {
1382 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
1385 memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
1388 if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
1389 if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
1391 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
1397 EVP_CIPHER *evp_cipher_new(void)
1399 EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
1401 if (cipher != NULL) {
1402 cipher->lock = CRYPTO_THREAD_lock_new();
1403 if (cipher->lock == NULL) {
1404 OPENSSL_free(cipher);
1413 * FIPS module note: since internal fetches will be entirely
1414 * provider based, we know that none of its code depends on legacy
1415 * NIDs or any functionality that use them.
1418 /* After removal of legacy support get rid of the need for legacy NIDs */
1419 static void set_legacy_nid(const char *name, void *vlegacy_nid)
1422 int *legacy_nid = vlegacy_nid;
1424 * We use lowest level function to get the associated method, because
1425 * higher level functions such as EVP_get_cipherbyname() have changed
1426 * to look at providers too.
1428 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
1430 if (*legacy_nid == -1) /* We found a clash already */
1432 if (legacy_method == NULL)
1434 nid = EVP_CIPHER_nid(legacy_method);
1435 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
1443 static void *evp_cipher_from_dispatch(const int name_id,
1444 const OSSL_DISPATCH *fns,
1445 OSSL_PROVIDER *prov)
1447 EVP_CIPHER *cipher = NULL;
1448 int fnciphcnt = 0, fnctxcnt = 0;
1450 if ((cipher = evp_cipher_new()) == NULL) {
1451 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
1456 cipher->nid = NID_undef;
1457 if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid)
1458 || cipher->nid == -1) {
1459 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1460 EVP_CIPHER_free(cipher);
1465 cipher->name_id = name_id;
1467 for (; fns->function_id != 0; fns++) {
1468 switch (fns->function_id) {
1469 case OSSL_FUNC_CIPHER_NEWCTX:
1470 if (cipher->newctx != NULL)
1472 cipher->newctx = OSSL_FUNC_cipher_newctx(fns);
1475 case OSSL_FUNC_CIPHER_ENCRYPT_INIT:
1476 if (cipher->einit != NULL)
1478 cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns);
1481 case OSSL_FUNC_CIPHER_DECRYPT_INIT:
1482 if (cipher->dinit != NULL)
1484 cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns);
1487 case OSSL_FUNC_CIPHER_UPDATE:
1488 if (cipher->cupdate != NULL)
1490 cipher->cupdate = OSSL_FUNC_cipher_update(fns);
1493 case OSSL_FUNC_CIPHER_FINAL:
1494 if (cipher->cfinal != NULL)
1496 cipher->cfinal = OSSL_FUNC_cipher_final(fns);
1499 case OSSL_FUNC_CIPHER_CIPHER:
1500 if (cipher->ccipher != NULL)
1502 cipher->ccipher = OSSL_FUNC_cipher_cipher(fns);
1504 case OSSL_FUNC_CIPHER_FREECTX:
1505 if (cipher->freectx != NULL)
1507 cipher->freectx = OSSL_FUNC_cipher_freectx(fns);
1510 case OSSL_FUNC_CIPHER_DUPCTX:
1511 if (cipher->dupctx != NULL)
1513 cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns);
1515 case OSSL_FUNC_CIPHER_GET_PARAMS:
1516 if (cipher->get_params != NULL)
1518 cipher->get_params = OSSL_FUNC_cipher_get_params(fns);
1520 case OSSL_FUNC_CIPHER_GET_CTX_PARAMS:
1521 if (cipher->get_ctx_params != NULL)
1523 cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns);
1525 case OSSL_FUNC_CIPHER_SET_CTX_PARAMS:
1526 if (cipher->set_ctx_params != NULL)
1528 cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns);
1530 case OSSL_FUNC_CIPHER_GETTABLE_PARAMS:
1531 if (cipher->gettable_params != NULL)
1533 cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns);
1535 case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS:
1536 if (cipher->gettable_ctx_params != NULL)
1538 cipher->gettable_ctx_params =
1539 OSSL_FUNC_cipher_gettable_ctx_params(fns);
1541 case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS:
1542 if (cipher->settable_ctx_params != NULL)
1544 cipher->settable_ctx_params =
1545 OSSL_FUNC_cipher_settable_ctx_params(fns);
1549 if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4)
1550 || (fnciphcnt == 0 && cipher->ccipher == NULL)
1553 * In order to be a consistent set of functions we must have at least
1554 * a complete set of "encrypt" functions, or a complete set of "decrypt"
1555 * functions, or a single "cipher" function. In all cases we need both
1556 * the "newctx" and "freectx" functions.
1558 EVP_CIPHER_free(cipher);
1559 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1562 cipher->prov = prov;
1564 ossl_provider_up_ref(prov);
1566 if (!evp_cipher_cache_constants(cipher)) {
1567 EVP_CIPHER_free(cipher);
1568 ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED);
1575 static int evp_cipher_up_ref(void *cipher)
1577 return EVP_CIPHER_up_ref(cipher);
1580 static void evp_cipher_free(void *cipher)
1582 EVP_CIPHER_free(cipher);
1585 EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
1586 const char *properties)
1588 EVP_CIPHER *cipher =
1589 evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties,
1590 evp_cipher_from_dispatch, evp_cipher_up_ref,
1596 int EVP_CIPHER_up_ref(EVP_CIPHER *cipher)
1600 CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock);
1604 void EVP_CIPHER_free(EVP_CIPHER *cipher)
1611 CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock);
1614 ossl_provider_free(cipher->prov);
1615 CRYPTO_THREAD_lock_free(cipher->lock);
1616 OPENSSL_free(cipher);
1619 void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx,
1620 void (*fn)(EVP_CIPHER *mac, void *arg),
1623 evp_generic_do_all(libctx, OSSL_OP_CIPHER,
1624 (void (*)(void *, void *))fn, arg,
1625 evp_cipher_from_dispatch, evp_cipher_free);