2 * Copyright 1995-2022 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 <openssl/evp.h>
17 #include <openssl/err.h>
18 #include <openssl/rand.h>
20 # include <openssl/engine.h>
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 "crypto/evp.h"
28 #include "evp_local.h"
30 int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx)
35 if (ctx->cipher == NULL || ctx->cipher->prov == NULL)
38 if (ctx->algctx != NULL) {
39 if (ctx->cipher->freectx != NULL)
40 ctx->cipher->freectx(ctx->algctx);
43 if (ctx->fetched_cipher != NULL)
44 EVP_CIPHER_free(ctx->fetched_cipher);
45 memset(ctx, 0, sizeof(*ctx));
49 /* Remove legacy code below when legacy support is removed. */
52 if (ctx->cipher != NULL) {
53 if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx))
55 /* Cleanse cipher context data */
56 if (ctx->cipher_data && ctx->cipher->ctx_size)
57 OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size);
59 OPENSSL_free(ctx->cipher_data);
60 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
61 ENGINE_finish(ctx->engine);
63 memset(ctx, 0, sizeof(*ctx));
67 EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
69 return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX));
72 void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
76 EVP_CIPHER_CTX_reset(ctx);
80 static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx,
81 const EVP_CIPHER *cipher,
82 ENGINE *impl, const unsigned char *key,
83 const unsigned char *iv, int enc,
84 const OSSL_PARAM params[])
87 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
88 ENGINE *tmpimpl = NULL;
91 * enc == 1 means we are encrypting.
92 * enc == 0 means we are decrypting.
93 * enc == -1 means, use the previously initialised value for encrypt/decrypt
103 if (cipher == NULL && ctx->cipher == NULL) {
104 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
108 /* Code below to be removed when legacy support is dropped. */
110 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
112 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
113 * this context may already have an ENGINE! Try to avoid releasing the
114 * previous handle, re-querying for an ENGINE, and having a
115 * reinitialisation, when it may all be unnecessary.
117 if (ctx->engine && ctx->cipher
118 && (cipher == NULL || cipher->nid == ctx->cipher->nid))
121 if (cipher != NULL && impl == NULL) {
122 /* Ask if an ENGINE is reserved for this job */
123 tmpimpl = ENGINE_get_cipher_engine(cipher->nid);
128 * If there are engines involved then we should use legacy handling for now.
130 if (ctx->engine != NULL
131 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
135 if (ctx->cipher == ctx->fetched_cipher)
137 EVP_CIPHER_free(ctx->fetched_cipher);
138 ctx->fetched_cipher = NULL;
142 * Ensure a context left lying around from last time is cleared
145 if (cipher != NULL && ctx->cipher != NULL) {
146 OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size);
147 ctx->cipher_data = NULL;
151 /* Start of non-legacy code below */
153 /* Ensure a context left lying around from last time is cleared */
154 if (cipher != NULL && ctx->cipher != NULL) {
155 unsigned long flags = ctx->flags;
157 EVP_CIPHER_CTX_reset(ctx);
158 /* Restore encrypt and flags */
164 cipher = ctx->cipher;
166 if (cipher->prov == NULL) {
168 /* We only do explicit fetches inside the FIPS module */
169 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
172 EVP_CIPHER *provciph =
173 EVP_CIPHER_fetch(NULL,
174 cipher->nid == NID_undef ? "NULL"
175 : OBJ_nid2sn(cipher->nid),
178 if (provciph == NULL)
181 EVP_CIPHER_free(ctx->fetched_cipher);
182 ctx->fetched_cipher = provciph;
186 if (cipher->prov != NULL) {
187 if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) {
188 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
191 EVP_CIPHER_free(ctx->fetched_cipher);
192 ctx->fetched_cipher = (EVP_CIPHER *)cipher;
194 ctx->cipher = cipher;
195 if (ctx->algctx == NULL) {
196 ctx->algctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov));
197 if (ctx->algctx == NULL) {
198 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
203 if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) {
205 * If this ctx was already set up for no padding then we need to tell
206 * the new cipher about it.
208 if (!EVP_CIPHER_CTX_set_padding(ctx, 0))
213 if (ctx->cipher->einit == NULL) {
214 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
218 return ctx->cipher->einit(ctx->algctx,
221 : EVP_CIPHER_CTX_get_key_length(ctx),
224 : EVP_CIPHER_CTX_get_iv_length(ctx),
228 if (ctx->cipher->dinit == NULL) {
229 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
233 return ctx->cipher->dinit(ctx->algctx,
236 : EVP_CIPHER_CTX_get_key_length(ctx),
239 : EVP_CIPHER_CTX_get_iv_length(ctx),
242 /* Code below to be removed when legacy support is dropped. */
245 if (cipher != NULL) {
247 * Ensure a context left lying around from last time is cleared (we
248 * previously attempted to avoid this if the same ENGINE and
249 * EVP_CIPHER could be used).
252 unsigned long flags = ctx->flags;
253 EVP_CIPHER_CTX_reset(ctx);
254 /* Restore encrypt and flags */
258 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
260 if (!ENGINE_init(impl)) {
261 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
268 /* There's an ENGINE for this job ... (apparently) */
269 const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
273 * One positive side-effect of US's export control history,
274 * is that we should at least be able to avoid using US
275 * misspellings of "initialisation"?
277 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
280 /* We'll use the ENGINE's private cipher definition */
283 * Store the ENGINE functional reference so we know 'cipher' came
284 * from an ENGINE and we need to release it when done.
292 ctx->cipher = cipher;
293 if (ctx->cipher->ctx_size) {
294 ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
295 if (ctx->cipher_data == NULL) {
297 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
301 ctx->cipher_data = NULL;
303 ctx->key_len = cipher->key_len;
304 /* Preserve wrap enable flag, zero everything else */
305 ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
306 if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
307 if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
309 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
314 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
317 if (ctx->cipher == NULL)
320 /* we assume block size is a power of 2 in *cryptUpdate */
321 OPENSSL_assert(ctx->cipher->block_size == 1
322 || ctx->cipher->block_size == 8
323 || ctx->cipher->block_size == 16);
325 if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
326 && EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_WRAP_MODE) {
327 ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED);
331 if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx))
332 & EVP_CIPH_CUSTOM_IV) == 0) {
333 switch (EVP_CIPHER_CTX_get_mode(ctx)) {
335 case EVP_CIPH_STREAM_CIPHER:
336 case EVP_CIPH_ECB_MODE:
339 case EVP_CIPH_CFB_MODE:
340 case EVP_CIPH_OFB_MODE:
345 case EVP_CIPH_CBC_MODE:
346 n = EVP_CIPHER_CTX_get_iv_length(ctx);
347 if (n < 0 || n > (int)sizeof(ctx->iv)) {
348 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
352 memcpy(ctx->oiv, iv, n);
353 memcpy(ctx->iv, ctx->oiv, n);
356 case EVP_CIPH_CTR_MODE:
358 /* Don't reuse IV for CTR mode */
360 n = EVP_CIPHER_CTX_get_iv_length(ctx);
361 if (n <= 0 || n > (int)sizeof(ctx->iv)) {
362 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
365 memcpy(ctx->iv, iv, n);
374 if (key != NULL || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
375 if (!ctx->cipher->init(ctx, key, iv, enc))
380 ctx->block_mask = ctx->cipher->block_size - 1;
384 int EVP_CipherInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
385 const unsigned char *key, const unsigned char *iv,
386 int enc, const OSSL_PARAM params[])
388 return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, params);
391 int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
392 const unsigned char *key, const unsigned char *iv, int enc)
395 EVP_CIPHER_CTX_reset(ctx);
396 return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, NULL);
399 int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
400 ENGINE *impl, const unsigned char *key,
401 const unsigned char *iv, int enc)
403 return evp_cipher_init_internal(ctx, cipher, impl, key, iv, enc, NULL);
406 int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
407 const unsigned char *in, int inl)
410 return EVP_EncryptUpdate(ctx, out, outl, in, inl);
412 return EVP_DecryptUpdate(ctx, out, outl, in, inl);
415 int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
418 return EVP_EncryptFinal_ex(ctx, out, outl);
420 return EVP_DecryptFinal_ex(ctx, out, outl);
423 int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
426 return EVP_EncryptFinal(ctx, out, outl);
428 return EVP_DecryptFinal(ctx, out, outl);
431 int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
432 const unsigned char *key, const unsigned char *iv)
434 return EVP_CipherInit(ctx, cipher, key, iv, 1);
437 int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
438 ENGINE *impl, const unsigned char *key,
439 const unsigned char *iv)
441 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
444 int EVP_EncryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
445 const unsigned char *key, const unsigned char *iv,
446 const OSSL_PARAM params[])
448 return EVP_CipherInit_ex2(ctx, cipher, key, iv, 1, params);
451 int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
452 const unsigned char *key, const unsigned char *iv)
454 return EVP_CipherInit(ctx, cipher, key, iv, 0);
457 int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
458 ENGINE *impl, const unsigned char *key,
459 const unsigned char *iv)
461 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
464 int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
465 const unsigned char *key, const unsigned char *iv,
466 const OSSL_PARAM params[])
468 return EVP_CipherInit_ex2(ctx, cipher, key, iv, 0, params);
472 * According to the letter of standard difference between pointers
473 * is specified to be valid only within same object. This makes
474 * it formally challenging to determine if input and output buffers
475 * are not partially overlapping with standard pointer arithmetic.
480 #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64
482 * Then we have VMS that distinguishes itself by adhering to
483 * sizeof(size_t)==4 even in 64-bit builds, which means that
484 * difference between two pointers might be truncated to 32 bits.
485 * In the context one can even wonder how comparison for
486 * equality is implemented. To be on the safe side we adhere to
487 * PTRDIFF_T even for comparison for equality.
489 # define PTRDIFF_T uint64_t
491 # define PTRDIFF_T size_t
494 int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
496 PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2;
498 * Check for partially overlapping buffers. [Binary logical
499 * operations are used instead of boolean to minimize number
500 * of conditional branches.]
502 int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) |
503 (diff > (0 - (PTRDIFF_T)len)));
508 static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
509 unsigned char *out, int *outl,
510 const unsigned char *in, int inl)
512 int i, j, bl, cmpl = inl;
514 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
515 cmpl = (cmpl + 7) / 8;
517 bl = ctx->cipher->block_size;
519 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
520 /* If block size > 1 then the cipher will have to do this check */
521 if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
522 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
526 i = ctx->cipher->do_cipher(ctx, out, in, inl);
538 if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
539 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
543 if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) {
544 if (ctx->cipher->do_cipher(ctx, out, in, inl)) {
553 OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
556 memcpy(&(ctx->buf[i]), in, inl);
564 * Once we've processed the first j bytes from in, the amount of
565 * data left that is a multiple of the block length is:
566 * (inl - j) & ~(bl - 1)
567 * We must ensure that this amount of data, plus the one block that
568 * we process from ctx->buf does not exceed INT_MAX
570 if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) {
571 ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
574 memcpy(&(ctx->buf[i]), in, j);
577 if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
587 if (!ctx->cipher->do_cipher(ctx, out, in, inl))
593 memcpy(ctx->buf, &(in[inl]), i);
599 int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
600 const unsigned char *in, int inl)
603 size_t soutl, inl_ = (size_t)inl;
609 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
613 /* Prevent accidental use of decryption context when encrypting */
615 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
619 if (ctx->cipher == NULL) {
620 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
624 if (ctx->cipher->prov == NULL)
627 blocksize = ctx->cipher->block_size;
629 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
630 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
634 ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
635 inl_ + (size_t)(blocksize == 1 ? 0 : blocksize),
639 if (soutl > INT_MAX) {
640 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
648 /* Code below to be removed when legacy support is dropped. */
651 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
654 int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
657 ret = EVP_EncryptFinal_ex(ctx, out, outl);
661 int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
664 unsigned int i, b, bl;
671 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
675 /* Prevent accidental use of decryption context when encrypting */
677 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
681 if (ctx->cipher == NULL) {
682 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
685 if (ctx->cipher->prov == NULL)
688 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
690 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
691 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
695 ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
696 blocksize == 1 ? 0 : blocksize);
699 if (soutl > INT_MAX) {
700 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
708 /* Code below to be removed when legacy support is dropped. */
711 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
712 ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
720 b = ctx->cipher->block_size;
721 OPENSSL_assert(b <= sizeof(ctx->buf));
727 if (ctx->flags & EVP_CIPH_NO_PADDING) {
729 ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
737 for (i = bl; i < b; i++)
739 ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b);
747 int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
748 const unsigned char *in, int inl)
750 int fix_len, cmpl = inl, ret;
752 size_t soutl, inl_ = (size_t)inl;
758 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
762 /* Prevent accidental use of encryption context when decrypting */
764 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
768 if (ctx->cipher == NULL) {
769 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
772 if (ctx->cipher->prov == NULL)
775 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
777 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
778 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
781 ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
782 inl_ + (size_t)(blocksize == 1 ? 0 : blocksize),
786 if (soutl > INT_MAX) {
787 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
795 /* Code below to be removed when legacy support is dropped. */
798 b = ctx->cipher->block_size;
800 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
801 cmpl = (cmpl + 7) / 8;
803 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
804 if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
805 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
809 fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
823 if (ctx->flags & EVP_CIPH_NO_PADDING)
824 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
826 OPENSSL_assert(b <= sizeof(ctx->final));
828 if (ctx->final_used) {
829 /* see comment about PTRDIFF_T comparison above */
830 if (((PTRDIFF_T)out == (PTRDIFF_T)in)
831 || ossl_is_partially_overlapping(out, in, b)) {
832 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
836 * final_used is only ever set if buf_len is 0. Therefore the maximum
837 * length output we will ever see from evp_EncryptDecryptUpdate is
838 * the maximum multiple of the block length that is <= inl, or just:
840 * Since final_used has been set then the final output length is:
841 * (inl & ~(b - 1)) + b
842 * This must never exceed INT_MAX
844 if ((inl & ~(b - 1)) > INT_MAX - b) {
845 ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
848 memcpy(out, ctx->final, b);
854 if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl))
858 * if we have 'decrypted' a multiple of block size, make sure we have a
859 * copy of this last block
861 if (b > 1 && !ctx->buf_len) {
864 memcpy(ctx->final, &out[*outl], b);
874 int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
877 ret = EVP_DecryptFinal_ex(ctx, out, outl);
881 int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
892 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
896 /* Prevent accidental use of encryption context when decrypting */
898 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
902 if (ctx->cipher == NULL) {
903 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
907 if (ctx->cipher->prov == NULL)
910 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
912 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
913 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
917 ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
918 blocksize == 1 ? 0 : blocksize);
921 if (soutl > INT_MAX) {
922 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
930 /* Code below to be removed when legacy support is dropped. */
934 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
935 i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
943 b = ctx->cipher->block_size;
944 if (ctx->flags & EVP_CIPH_NO_PADDING) {
946 ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
953 if (ctx->buf_len || !ctx->final_used) {
954 ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
957 OPENSSL_assert(b <= sizeof(ctx->final));
960 * The following assumes that the ciphertext has been authenticated.
961 * Otherwise it provides a padding oracle.
963 n = ctx->final[b - 1];
964 if (n == 0 || n > (int)b) {
965 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
968 for (i = 0; i < n; i++) {
969 if (ctx->final[--b] != n) {
970 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
974 n = ctx->cipher->block_size - n;
975 for (i = 0; i < n; i++)
976 out[i] = ctx->final[i];
983 int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
985 if (c->cipher->prov != NULL) {
987 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
990 if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
993 /* Check the cipher actually understands this parameter */
994 if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher),
995 OSSL_CIPHER_PARAM_KEYLEN) == NULL) {
996 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
1000 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
1001 ok = evp_do_ciph_ctx_setparams(c->cipher, c->algctx, params);
1003 return ok > 0 ? 1 : 0;
1006 /* Code below to be removed when legacy support is dropped. */
1009 * Note there have never been any built-in ciphers that define this flag
1010 * since it was first introduced.
1012 if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
1013 return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
1014 if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
1016 if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
1017 c->key_len = keylen;
1020 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
1024 int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
1027 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1028 unsigned int pd = pad;
1031 ctx->flags &= ~EVP_CIPH_NO_PADDING;
1033 ctx->flags |= EVP_CIPH_NO_PADDING;
1035 if (ctx->cipher != NULL && ctx->cipher->prov == NULL)
1037 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd);
1038 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1043 int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1045 int ret = EVP_CTRL_RET_UNSUPPORTED;
1049 OSSL_PARAM params[4] = {
1050 OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
1053 if (ctx == NULL || ctx->cipher == NULL) {
1054 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
1058 if (ctx->cipher->prov == NULL)
1062 case EVP_CTRL_SET_KEY_LENGTH:
1063 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz);
1065 case EVP_CTRL_RAND_KEY: /* Used by DES */
1068 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY,
1074 * EVP_CTRL_INIT is purely legacy, no provider counterpart.
1075 * As a matter of fact, this should be dead code, but some caller
1076 * might still do a direct control call with this command, so...
1077 * Legacy methods return 1 except for exceptional circumstances, so
1078 * we do the same here to not be disruptive.
1081 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */
1084 case EVP_CTRL_AEAD_SET_IVLEN:
1087 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1089 case EVP_CTRL_CCM_SET_L:
1090 if (arg < 2 || arg > 8)
1093 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1095 case EVP_CTRL_AEAD_SET_IV_FIXED:
1096 params[0] = OSSL_PARAM_construct_octet_string(
1097 OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz);
1099 case EVP_CTRL_GCM_IV_GEN:
1102 sz = 0; /* special case that uses the iv length */
1103 params[0] = OSSL_PARAM_construct_octet_string(
1104 OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz);
1106 case EVP_CTRL_GCM_SET_IV_INV:
1109 params[0] = OSSL_PARAM_construct_octet_string(
1110 OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz);
1112 case EVP_CTRL_GET_RC5_ROUNDS:
1113 set_params = 0; /* Fall thru */
1114 case EVP_CTRL_SET_RC5_ROUNDS:
1117 i = (unsigned int)arg;
1118 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i);
1120 case EVP_CTRL_SET_SPEED:
1123 i = (unsigned int)arg;
1124 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i);
1126 case EVP_CTRL_AEAD_GET_TAG:
1127 set_params = 0; /* Fall thru */
1128 case EVP_CTRL_AEAD_SET_TAG:
1129 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
1132 case EVP_CTRL_AEAD_TLS1_AAD:
1133 /* This one does a set and a get - since it returns a size */
1135 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD,
1137 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1141 OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz);
1142 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1146 #ifndef OPENSSL_NO_RC2
1147 case EVP_CTRL_GET_RC2_KEY_BITS:
1148 set_params = 0; /* Fall thru */
1149 case EVP_CTRL_SET_RC2_KEY_BITS:
1150 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz);
1152 #endif /* OPENSSL_NO_RC2 */
1153 #if !defined(OPENSSL_NO_MULTIBLOCK)
1154 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
1155 params[0] = OSSL_PARAM_construct_size_t(
1156 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz);
1157 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1161 params[0] = OSSL_PARAM_construct_size_t(
1162 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz);
1163 params[1] = OSSL_PARAM_construct_end();
1164 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1168 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: {
1169 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1170 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1172 if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
1175 params[0] = OSSL_PARAM_construct_octet_string(
1176 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len);
1177 params[1] = OSSL_PARAM_construct_uint(
1178 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1179 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1182 /* Retrieve the return values changed by the set */
1183 params[0] = OSSL_PARAM_construct_size_t(
1184 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz);
1185 params[1] = OSSL_PARAM_construct_uint(
1186 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1187 params[2] = OSSL_PARAM_construct_end();
1188 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1193 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: {
1194 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1195 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1197 params[0] = OSSL_PARAM_construct_octet_string(
1198 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len);
1200 params[1] = OSSL_PARAM_construct_octet_string(
1201 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp,
1203 params[2] = OSSL_PARAM_construct_uint(
1204 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1205 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1208 params[0] = OSSL_PARAM_construct_size_t(
1209 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz);
1210 params[1] = OSSL_PARAM_construct_end();
1211 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1216 #endif /* OPENSSL_NO_MULTIBLOCK */
1217 case EVP_CTRL_AEAD_SET_MAC_KEY:
1220 params[0] = OSSL_PARAM_construct_octet_string(
1221 OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz);
1226 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1228 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1231 /* Code below to be removed when legacy support is dropped. */
1233 if (ctx->cipher->ctrl == NULL) {
1234 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
1238 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
1241 if (ret == EVP_CTRL_RET_UNSUPPORTED) {
1242 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
1248 int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[])
1250 if (cipher != NULL && cipher->get_params != NULL)
1251 return cipher->get_params(params);
1255 int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[])
1257 if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL)
1258 return ctx->cipher->set_ctx_params(ctx->algctx, params);
1262 int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[])
1264 if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL)
1265 return ctx->cipher->get_ctx_params(ctx->algctx, params);
1269 const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher)
1271 if (cipher != NULL && cipher->gettable_params != NULL)
1272 return cipher->gettable_params(
1273 ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)));
1277 const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher)
1281 if (cipher != NULL && cipher->settable_ctx_params != NULL) {
1282 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
1283 return cipher->settable_ctx_params(NULL, provctx);
1288 const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher)
1292 if (cipher != NULL && cipher->gettable_ctx_params != NULL) {
1293 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
1294 return cipher->gettable_ctx_params(NULL, provctx);
1299 const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx)
1303 if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) {
1304 alg = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
1305 return cctx->cipher->settable_ctx_params(cctx->algctx, alg);
1310 const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx)
1314 if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) {
1315 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
1316 return cctx->cipher->gettable_ctx_params(cctx->algctx, provctx);
1322 static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx)
1324 const EVP_CIPHER *cipher = ctx->cipher;
1325 const OSSL_PROVIDER *prov;
1330 prov = EVP_CIPHER_get0_provider(cipher);
1331 return ossl_provider_libctx(prov);
1335 int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
1337 if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
1338 return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
1345 OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx);
1347 kl = EVP_CIPHER_CTX_get_key_length(ctx);
1348 if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl, 0) <= 0)
1352 #endif /* FIPS_MODULE */
1355 int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
1357 if ((in == NULL) || (in->cipher == NULL)) {
1358 ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED);
1362 if (in->cipher->prov == NULL)
1365 if (in->cipher->dupctx == NULL) {
1366 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
1370 EVP_CIPHER_CTX_reset(out);
1375 if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) {
1376 out->fetched_cipher = NULL;
1380 out->algctx = in->cipher->dupctx(in->algctx);
1381 if (out->algctx == NULL) {
1382 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
1388 /* Code below to be removed when legacy support is dropped. */
1391 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
1392 /* Make sure it's safe to copy a cipher context using an ENGINE */
1393 if (in->engine && !ENGINE_init(in->engine)) {
1394 ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB);
1399 EVP_CIPHER_CTX_reset(out);
1400 memcpy(out, in, sizeof(*out));
1402 if (in->cipher_data && in->cipher->ctx_size) {
1403 out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
1404 if (out->cipher_data == NULL) {
1406 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
1409 memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
1412 if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
1413 if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
1415 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
1421 EVP_CIPHER *evp_cipher_new(void)
1423 EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
1425 if (cipher != NULL) {
1426 cipher->lock = CRYPTO_THREAD_lock_new();
1427 if (cipher->lock == NULL) {
1428 OPENSSL_free(cipher);
1437 * FIPS module note: since internal fetches will be entirely
1438 * provider based, we know that none of its code depends on legacy
1439 * NIDs or any functionality that use them.
1442 /* After removal of legacy support get rid of the need for legacy NIDs */
1443 static void set_legacy_nid(const char *name, void *vlegacy_nid)
1446 int *legacy_nid = vlegacy_nid;
1448 * We use lowest level function to get the associated method, because
1449 * higher level functions such as EVP_get_cipherbyname() have changed
1450 * to look at providers too.
1452 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
1454 if (*legacy_nid == -1) /* We found a clash already */
1456 if (legacy_method == NULL)
1458 nid = EVP_CIPHER_get_nid(legacy_method);
1459 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
1467 static void *evp_cipher_from_algorithm(const int name_id,
1468 const OSSL_ALGORITHM *algodef,
1469 OSSL_PROVIDER *prov)
1471 const OSSL_DISPATCH *fns = algodef->implementation;
1472 EVP_CIPHER *cipher = NULL;
1473 int fnciphcnt = 0, fnctxcnt = 0;
1475 if ((cipher = evp_cipher_new()) == NULL) {
1476 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
1481 cipher->nid = NID_undef;
1482 if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid)
1483 || cipher->nid == -1) {
1484 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1485 EVP_CIPHER_free(cipher);
1490 cipher->name_id = name_id;
1491 if ((cipher->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
1492 EVP_CIPHER_free(cipher);
1495 cipher->description = algodef->algorithm_description;
1497 for (; fns->function_id != 0; fns++) {
1498 switch (fns->function_id) {
1499 case OSSL_FUNC_CIPHER_NEWCTX:
1500 if (cipher->newctx != NULL)
1502 cipher->newctx = OSSL_FUNC_cipher_newctx(fns);
1505 case OSSL_FUNC_CIPHER_ENCRYPT_INIT:
1506 if (cipher->einit != NULL)
1508 cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns);
1511 case OSSL_FUNC_CIPHER_DECRYPT_INIT:
1512 if (cipher->dinit != NULL)
1514 cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns);
1517 case OSSL_FUNC_CIPHER_UPDATE:
1518 if (cipher->cupdate != NULL)
1520 cipher->cupdate = OSSL_FUNC_cipher_update(fns);
1523 case OSSL_FUNC_CIPHER_FINAL:
1524 if (cipher->cfinal != NULL)
1526 cipher->cfinal = OSSL_FUNC_cipher_final(fns);
1529 case OSSL_FUNC_CIPHER_CIPHER:
1530 if (cipher->ccipher != NULL)
1532 cipher->ccipher = OSSL_FUNC_cipher_cipher(fns);
1534 case OSSL_FUNC_CIPHER_FREECTX:
1535 if (cipher->freectx != NULL)
1537 cipher->freectx = OSSL_FUNC_cipher_freectx(fns);
1540 case OSSL_FUNC_CIPHER_DUPCTX:
1541 if (cipher->dupctx != NULL)
1543 cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns);
1545 case OSSL_FUNC_CIPHER_GET_PARAMS:
1546 if (cipher->get_params != NULL)
1548 cipher->get_params = OSSL_FUNC_cipher_get_params(fns);
1550 case OSSL_FUNC_CIPHER_GET_CTX_PARAMS:
1551 if (cipher->get_ctx_params != NULL)
1553 cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns);
1555 case OSSL_FUNC_CIPHER_SET_CTX_PARAMS:
1556 if (cipher->set_ctx_params != NULL)
1558 cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns);
1560 case OSSL_FUNC_CIPHER_GETTABLE_PARAMS:
1561 if (cipher->gettable_params != NULL)
1563 cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns);
1565 case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS:
1566 if (cipher->gettable_ctx_params != NULL)
1568 cipher->gettable_ctx_params =
1569 OSSL_FUNC_cipher_gettable_ctx_params(fns);
1571 case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS:
1572 if (cipher->settable_ctx_params != NULL)
1574 cipher->settable_ctx_params =
1575 OSSL_FUNC_cipher_settable_ctx_params(fns);
1579 if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4)
1580 || (fnciphcnt == 0 && cipher->ccipher == NULL)
1583 * In order to be a consistent set of functions we must have at least
1584 * a complete set of "encrypt" functions, or a complete set of "decrypt"
1585 * functions, or a single "cipher" function. In all cases we need both
1586 * the "newctx" and "freectx" functions.
1588 EVP_CIPHER_free(cipher);
1589 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1592 cipher->prov = prov;
1594 ossl_provider_up_ref(prov);
1596 if (!evp_cipher_cache_constants(cipher)) {
1597 EVP_CIPHER_free(cipher);
1598 ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED);
1605 static int evp_cipher_up_ref(void *cipher)
1607 return EVP_CIPHER_up_ref(cipher);
1610 static void evp_cipher_free(void *cipher)
1612 EVP_CIPHER_free(cipher);
1615 EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
1616 const char *properties)
1618 EVP_CIPHER *cipher =
1619 evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties,
1620 evp_cipher_from_algorithm, evp_cipher_up_ref,
1626 int EVP_CIPHER_up_ref(EVP_CIPHER *cipher)
1630 if (cipher->origin == EVP_ORIG_DYNAMIC)
1631 CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock);
1635 void evp_cipher_free_int(EVP_CIPHER *cipher)
1637 OPENSSL_free(cipher->type_name);
1638 ossl_provider_free(cipher->prov);
1639 CRYPTO_THREAD_lock_free(cipher->lock);
1640 OPENSSL_free(cipher);
1643 void EVP_CIPHER_free(EVP_CIPHER *cipher)
1647 if (cipher == NULL || cipher->origin != EVP_ORIG_DYNAMIC)
1650 CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock);
1653 evp_cipher_free_int(cipher);
1656 void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx,
1657 void (*fn)(EVP_CIPHER *mac, void *arg),
1660 evp_generic_do_all(libctx, OSSL_OP_CIPHER,
1661 (void (*)(void *, void *))fn, arg,
1662 evp_cipher_from_algorithm, evp_cipher_up_ref,