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 <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));
50 /* Remove legacy code below when legacy support is removed. */
53 if (ctx->cipher != NULL) {
54 if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx))
56 /* Cleanse cipher context data */
57 if (ctx->cipher_data && ctx->cipher->ctx_size)
58 OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size);
60 OPENSSL_free(ctx->cipher_data);
61 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
62 ENGINE_finish(ctx->engine);
64 memset(ctx, 0, sizeof(*ctx));
69 EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
71 return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX));
74 void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
78 EVP_CIPHER_CTX_reset(ctx);
82 static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx,
83 const EVP_CIPHER *cipher,
84 ENGINE *impl, const unsigned char *key,
85 const unsigned char *iv, int enc,
86 const OSSL_PARAM params[])
89 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
90 ENGINE *tmpimpl = NULL;
96 * enc == 1 means we are encrypting.
97 * enc == 0 means we are decrypting.
98 * enc == -1 means, use the previously initialised value for encrypt/decrypt
108 if (cipher == NULL && ctx->cipher == NULL) {
109 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
113 /* Code below to be removed when legacy support is dropped. */
115 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
117 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
118 * this context may already have an ENGINE! Try to avoid releasing the
119 * previous handle, re-querying for an ENGINE, and having a
120 * reinitialisation, when it may all be unnecessary.
122 if (ctx->engine && ctx->cipher
123 && (cipher == NULL || cipher->nid == ctx->cipher->nid))
126 if (cipher != NULL && impl == NULL) {
127 /* Ask if an ENGINE is reserved for this job */
128 tmpimpl = ENGINE_get_cipher_engine(cipher->nid);
133 * If there are engines involved then we should use legacy handling for now.
135 if (ctx->engine != NULL
136 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
140 if (ctx->cipher == ctx->fetched_cipher)
142 EVP_CIPHER_free(ctx->fetched_cipher);
143 ctx->fetched_cipher = NULL;
147 * Ensure a context left lying around from last time is cleared
150 if (cipher != NULL && ctx->cipher != NULL) {
151 OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size);
152 ctx->cipher_data = NULL;
156 /* Start of non-legacy code below */
158 /* Ensure a context left lying around from last time is cleared */
159 if (cipher != NULL && ctx->cipher != NULL) {
160 unsigned long flags = ctx->flags;
162 EVP_CIPHER_CTX_reset(ctx);
163 /* Restore encrypt and flags */
169 cipher = ctx->cipher;
171 if (cipher->prov == NULL) {
173 /* We only do explicit fetches inside the FIPS module */
174 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
177 EVP_CIPHER *provciph =
178 EVP_CIPHER_fetch(NULL,
179 cipher->nid == NID_undef ? "NULL"
180 : OBJ_nid2sn(cipher->nid),
183 if (provciph == NULL)
186 EVP_CIPHER_free(ctx->fetched_cipher);
187 ctx->fetched_cipher = provciph;
191 if (cipher->prov != NULL) {
192 if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) {
193 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
196 EVP_CIPHER_free(ctx->fetched_cipher);
197 ctx->fetched_cipher = (EVP_CIPHER *)cipher;
199 ctx->cipher = cipher;
200 if (ctx->algctx == NULL) {
201 ctx->algctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov));
202 if (ctx->algctx == NULL) {
203 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
208 if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) {
210 * If this ctx was already set up for no padding then we need to tell
211 * the new cipher about it.
213 if (!EVP_CIPHER_CTX_set_padding(ctx, 0))
218 if (ctx->cipher->einit == NULL) {
219 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
223 return ctx->cipher->einit(ctx->algctx,
226 : EVP_CIPHER_CTX_get_key_length(ctx),
229 : EVP_CIPHER_CTX_get_iv_length(ctx),
233 if (ctx->cipher->dinit == NULL) {
234 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
238 return ctx->cipher->dinit(ctx->algctx,
241 : EVP_CIPHER_CTX_get_key_length(ctx),
244 : EVP_CIPHER_CTX_get_iv_length(ctx),
247 /* Code below to be removed when legacy support is dropped. */
250 if (cipher != NULL) {
252 * Ensure a context left lying around from last time is cleared (we
253 * previously attempted to avoid this if the same ENGINE and
254 * EVP_CIPHER could be used).
257 unsigned long flags = ctx->flags;
258 EVP_CIPHER_CTX_reset(ctx);
259 /* Restore encrypt and flags */
263 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
265 if (!ENGINE_init(impl)) {
266 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
273 /* There's an ENGINE for this job ... (apparently) */
274 const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
278 * One positive side-effect of US's export control history,
279 * is that we should at least be able to avoid using US
280 * misspellings of "initialisation"?
282 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
285 /* We'll use the ENGINE's private cipher definition */
288 * Store the ENGINE functional reference so we know 'cipher' came
289 * from an ENGINE and we need to release it when done.
297 ctx->cipher = cipher;
298 if (ctx->cipher->ctx_size) {
299 ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
300 if (ctx->cipher_data == NULL) {
302 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
306 ctx->cipher_data = NULL;
308 ctx->key_len = cipher->key_len;
309 /* Preserve wrap enable flag, zero everything else */
310 ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
311 if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
312 if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
314 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
319 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
322 if (ctx->cipher == NULL)
325 /* we assume block size is a power of 2 in *cryptUpdate */
326 OPENSSL_assert(ctx->cipher->block_size == 1
327 || ctx->cipher->block_size == 8
328 || ctx->cipher->block_size == 16);
330 if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
331 && EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_WRAP_MODE) {
332 ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED);
336 if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx))
337 & EVP_CIPH_CUSTOM_IV) == 0) {
338 switch (EVP_CIPHER_CTX_get_mode(ctx)) {
340 case EVP_CIPH_STREAM_CIPHER:
341 case EVP_CIPH_ECB_MODE:
344 case EVP_CIPH_CFB_MODE:
345 case EVP_CIPH_OFB_MODE:
350 case EVP_CIPH_CBC_MODE:
351 n = EVP_CIPHER_CTX_get_iv_length(ctx);
352 if (!ossl_assert(n >= 0 && n <= (int)sizeof(ctx->iv)))
355 memcpy(ctx->oiv, iv, n);
356 memcpy(ctx->iv, ctx->oiv, n);
359 case EVP_CIPH_CTR_MODE:
361 /* Don't reuse IV for CTR mode */
363 if ((n = EVP_CIPHER_CTX_get_iv_length(ctx)) <= 0)
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)
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);
633 ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
634 inl + (blocksize == 1 ? 0 : blocksize), in,
638 if (soutl > INT_MAX) {
639 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
647 /* Code below to be removed when legacy support is dropped. */
650 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
653 int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
656 ret = EVP_EncryptFinal_ex(ctx, out, outl);
660 int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
663 unsigned int i, b, bl;
670 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
674 /* Prevent accidental use of decryption context when encrypting */
676 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
680 if (ctx->cipher == NULL) {
681 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
684 if (ctx->cipher->prov == NULL)
687 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
689 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
690 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
694 ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
695 blocksize == 1 ? 0 : blocksize);
698 if (soutl > INT_MAX) {
699 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
707 /* Code below to be removed when legacy support is dropped. */
710 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
711 ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
719 b = ctx->cipher->block_size;
720 OPENSSL_assert(b <= sizeof(ctx->buf));
726 if (ctx->flags & EVP_CIPH_NO_PADDING) {
728 ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
736 for (i = bl; i < b; i++)
738 ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b);
746 int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
747 const unsigned char *in, int inl)
749 int fix_len, cmpl = inl, ret;
757 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
761 /* Prevent accidental use of encryption context when decrypting */
763 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
767 if (ctx->cipher == NULL) {
768 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
771 if (ctx->cipher->prov == NULL)
774 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
776 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
777 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
780 ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
781 inl + (blocksize == 1 ? 0 : blocksize), in,
785 if (soutl > INT_MAX) {
786 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
794 /* Code below to be removed when legacy support is dropped. */
797 b = ctx->cipher->block_size;
799 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
800 cmpl = (cmpl + 7) / 8;
802 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
803 if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
804 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
808 fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
822 if (ctx->flags & EVP_CIPH_NO_PADDING)
823 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
825 OPENSSL_assert(b <= sizeof(ctx->final));
827 if (ctx->final_used) {
828 /* see comment about PTRDIFF_T comparison above */
829 if (((PTRDIFF_T)out == (PTRDIFF_T)in)
830 || ossl_is_partially_overlapping(out, in, b)) {
831 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
835 * final_used is only ever set if buf_len is 0. Therefore the maximum
836 * length output we will ever see from evp_EncryptDecryptUpdate is
837 * the maximum multiple of the block length that is <= inl, or just:
839 * Since final_used has been set then the final output length is:
840 * (inl & ~(b - 1)) + b
841 * This must never exceed INT_MAX
843 if ((inl & ~(b - 1)) > INT_MAX - b) {
844 ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
847 memcpy(out, ctx->final, b);
853 if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl))
857 * if we have 'decrypted' a multiple of block size, make sure we have a
858 * copy of this last block
860 if (b > 1 && !ctx->buf_len) {
863 memcpy(ctx->final, &out[*outl], b);
873 int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
876 ret = EVP_DecryptFinal_ex(ctx, out, outl);
880 int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
891 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
895 /* Prevent accidental use of encryption context when decrypting */
897 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
901 if (ctx->cipher == NULL) {
902 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
906 if (ctx->cipher->prov == NULL)
909 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
911 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
912 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
916 ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
917 blocksize == 1 ? 0 : blocksize);
920 if (soutl > INT_MAX) {
921 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
929 /* Code below to be removed when legacy support is dropped. */
933 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
934 i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
942 b = ctx->cipher->block_size;
943 if (ctx->flags & EVP_CIPH_NO_PADDING) {
945 ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
952 if (ctx->buf_len || !ctx->final_used) {
953 ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
956 OPENSSL_assert(b <= sizeof(ctx->final));
959 * The following assumes that the ciphertext has been authenticated.
960 * Otherwise it provides a padding oracle.
962 n = ctx->final[b - 1];
963 if (n == 0 || n > (int)b) {
964 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
967 for (i = 0; i < n; i++) {
968 if (ctx->final[--b] != n) {
969 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
973 n = ctx->cipher->block_size - n;
974 for (i = 0; i < n; i++)
975 out[i] = ctx->final[i];
982 int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
984 if (c->cipher->prov != NULL) {
986 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
989 if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
992 /* Check the cipher actually understands this parameter */
993 if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher),
994 OSSL_CIPHER_PARAM_KEYLEN) == NULL) {
995 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
999 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
1000 ok = evp_do_ciph_ctx_setparams(c->cipher, c->algctx, params);
1002 return ok > 0 ? 1 : 0;
1005 /* Code below to be removed when legacy support is dropped. */
1008 * Note there have never been any built-in ciphers that define this flag
1009 * since it was first introduced.
1011 if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
1012 return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
1013 if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
1015 if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
1016 c->key_len = keylen;
1019 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
1023 int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
1026 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1027 unsigned int pd = pad;
1030 ctx->flags &= ~EVP_CIPH_NO_PADDING;
1032 ctx->flags |= EVP_CIPH_NO_PADDING;
1034 if (ctx->cipher != NULL && ctx->cipher->prov == NULL)
1036 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd);
1037 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1042 int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1044 int ret = EVP_CTRL_RET_UNSUPPORTED;
1048 OSSL_PARAM params[4] = {
1049 OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
1052 if (ctx == NULL || ctx->cipher == NULL) {
1053 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
1057 if (ctx->cipher->prov == NULL)
1061 case EVP_CTRL_SET_KEY_LENGTH:
1062 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz);
1064 case EVP_CTRL_RAND_KEY: /* Used by DES */
1067 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY,
1073 * EVP_CTRL_INIT is purely legacy, no provider counterpart.
1074 * As a matter of fact, this should be dead code, but some caller
1075 * might still do a direct control call with this command, so...
1076 * Legacy methods return 1 except for exceptional circumstances, so
1077 * we do the same here to not be disruptive.
1080 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */
1083 case EVP_CTRL_AEAD_SET_IVLEN:
1086 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);
1096 case EVP_CTRL_AEAD_SET_IV_FIXED:
1097 params[0] = OSSL_PARAM_construct_octet_string(
1098 OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz);
1100 case EVP_CTRL_GCM_IV_GEN:
1103 sz = 0; /* special case that uses the iv length */
1104 params[0] = OSSL_PARAM_construct_octet_string(
1105 OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz);
1107 case EVP_CTRL_GCM_SET_IV_INV:
1110 params[0] = OSSL_PARAM_construct_octet_string(
1111 OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz);
1113 case EVP_CTRL_GET_RC5_ROUNDS:
1114 set_params = 0; /* Fall thru */
1115 case EVP_CTRL_SET_RC5_ROUNDS:
1118 i = (unsigned int)arg;
1119 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i);
1121 case EVP_CTRL_SET_SPEED:
1124 i = (unsigned int)arg;
1125 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i);
1127 case EVP_CTRL_AEAD_GET_TAG:
1128 set_params = 0; /* Fall thru */
1129 case EVP_CTRL_AEAD_SET_TAG:
1130 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
1133 case EVP_CTRL_AEAD_TLS1_AAD:
1134 /* This one does a set and a get - since it returns a size */
1136 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD,
1138 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1142 OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz);
1143 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1147 #ifndef OPENSSL_NO_RC2
1148 case EVP_CTRL_GET_RC2_KEY_BITS:
1149 set_params = 0; /* Fall thru */
1150 case EVP_CTRL_SET_RC2_KEY_BITS:
1151 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz);
1153 #endif /* OPENSSL_NO_RC2 */
1154 #if !defined(OPENSSL_NO_MULTIBLOCK)
1155 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
1156 params[0] = OSSL_PARAM_construct_size_t(
1157 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz);
1158 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1162 params[0] = OSSL_PARAM_construct_size_t(
1163 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz);
1164 params[1] = OSSL_PARAM_construct_end();
1165 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1169 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: {
1170 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1171 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1173 if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
1176 params[0] = OSSL_PARAM_construct_octet_string(
1177 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len);
1178 params[1] = OSSL_PARAM_construct_uint(
1179 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1180 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1183 /* Retrieve the return values changed by the set */
1184 params[0] = OSSL_PARAM_construct_size_t(
1185 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz);
1186 params[1] = OSSL_PARAM_construct_uint(
1187 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1188 params[2] = OSSL_PARAM_construct_end();
1189 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1194 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: {
1195 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1196 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1198 params[0] = OSSL_PARAM_construct_octet_string(
1199 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len);
1201 params[1] = OSSL_PARAM_construct_octet_string(
1202 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp,
1204 params[2] = OSSL_PARAM_construct_uint(
1205 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1206 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1209 params[0] = OSSL_PARAM_construct_size_t(
1210 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz);
1211 params[1] = OSSL_PARAM_construct_end();
1212 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1217 #endif /* OPENSSL_NO_MULTIBLOCK */
1218 case EVP_CTRL_AEAD_SET_MAC_KEY:
1221 params[0] = OSSL_PARAM_construct_octet_string(
1222 OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz);
1227 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1229 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1232 /* Code below to be removed when legacy support is dropped. */
1234 if (ctx->cipher->ctrl == NULL) {
1235 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
1239 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
1242 if (ret == EVP_CTRL_RET_UNSUPPORTED) {
1243 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
1249 int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[])
1251 if (cipher != NULL && cipher->get_params != NULL)
1252 return cipher->get_params(params);
1256 int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[])
1258 if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) {
1260 return ctx->cipher->set_ctx_params(ctx->algctx, params);
1265 int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[])
1267 if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL)
1268 return ctx->cipher->get_ctx_params(ctx->algctx, params);
1272 const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher)
1274 if (cipher != NULL && cipher->gettable_params != NULL)
1275 return cipher->gettable_params(
1276 ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)));
1280 const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher)
1284 if (cipher != NULL && cipher->settable_ctx_params != NULL) {
1285 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
1286 return cipher->settable_ctx_params(NULL, provctx);
1291 const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher)
1295 if (cipher != NULL && cipher->gettable_ctx_params != NULL) {
1296 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
1297 return cipher->gettable_ctx_params(NULL, provctx);
1302 const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx)
1306 if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) {
1307 alg = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
1308 return cctx->cipher->settable_ctx_params(cctx->algctx, alg);
1313 const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx)
1317 if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) {
1318 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
1319 return cctx->cipher->gettable_ctx_params(cctx->algctx, provctx);
1325 static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx)
1327 const EVP_CIPHER *cipher = ctx->cipher;
1328 const OSSL_PROVIDER *prov;
1333 prov = EVP_CIPHER_get0_provider(cipher);
1334 return ossl_provider_libctx(prov);
1338 int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
1340 if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
1341 return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
1348 OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx);
1350 kl = EVP_CIPHER_CTX_get_key_length(ctx);
1351 if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl, 0) <= 0)
1355 #endif /* FIPS_MODULE */
1358 EVP_CIPHER_CTX *EVP_CIPHER_CTX_dup(const EVP_CIPHER_CTX *in)
1360 EVP_CIPHER_CTX *out = EVP_CIPHER_CTX_new();
1362 if (out != NULL && !EVP_CIPHER_CTX_copy(out, in)) {
1363 EVP_CIPHER_CTX_free(out);
1369 int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
1371 if ((in == NULL) || (in->cipher == NULL)) {
1372 ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED);
1376 if (in->cipher->prov == NULL)
1379 if (in->cipher->dupctx == NULL) {
1380 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
1384 EVP_CIPHER_CTX_reset(out);
1389 if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) {
1390 out->fetched_cipher = NULL;
1394 out->algctx = in->cipher->dupctx(in->algctx);
1395 if (out->algctx == NULL) {
1396 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
1402 /* Code below to be removed when legacy support is dropped. */
1405 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
1406 /* Make sure it's safe to copy a cipher context using an ENGINE */
1407 if (in->engine && !ENGINE_init(in->engine)) {
1408 ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB);
1413 EVP_CIPHER_CTX_reset(out);
1414 memcpy(out, in, sizeof(*out));
1416 if (in->cipher_data && in->cipher->ctx_size) {
1417 out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
1418 if (out->cipher_data == NULL) {
1420 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
1423 memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
1426 if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
1427 if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
1429 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
1435 EVP_CIPHER *evp_cipher_new(void)
1437 EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
1439 if (cipher != NULL) {
1440 cipher->lock = CRYPTO_THREAD_lock_new();
1441 if (cipher->lock == NULL) {
1442 OPENSSL_free(cipher);
1451 * FIPS module note: since internal fetches will be entirely
1452 * provider based, we know that none of its code depends on legacy
1453 * NIDs or any functionality that use them.
1456 /* After removal of legacy support get rid of the need for legacy NIDs */
1457 static void set_legacy_nid(const char *name, void *vlegacy_nid)
1460 int *legacy_nid = vlegacy_nid;
1462 * We use lowest level function to get the associated method, because
1463 * higher level functions such as EVP_get_cipherbyname() have changed
1464 * to look at providers too.
1466 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
1468 if (*legacy_nid == -1) /* We found a clash already */
1470 if (legacy_method == NULL)
1472 nid = EVP_CIPHER_get_nid(legacy_method);
1473 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
1481 static void *evp_cipher_from_algorithm(const int name_id,
1482 const OSSL_ALGORITHM *algodef,
1483 OSSL_PROVIDER *prov)
1485 const OSSL_DISPATCH *fns = algodef->implementation;
1486 EVP_CIPHER *cipher = NULL;
1487 int fnciphcnt = 0, fnctxcnt = 0;
1489 if ((cipher = evp_cipher_new()) == NULL) {
1490 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
1495 cipher->nid = NID_undef;
1496 if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid)
1497 || cipher->nid == -1) {
1498 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1499 EVP_CIPHER_free(cipher);
1504 cipher->name_id = name_id;
1505 if ((cipher->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
1506 EVP_CIPHER_free(cipher);
1509 cipher->description = algodef->algorithm_description;
1511 for (; fns->function_id != 0; fns++) {
1512 switch (fns->function_id) {
1513 case OSSL_FUNC_CIPHER_NEWCTX:
1514 if (cipher->newctx != NULL)
1516 cipher->newctx = OSSL_FUNC_cipher_newctx(fns);
1519 case OSSL_FUNC_CIPHER_ENCRYPT_INIT:
1520 if (cipher->einit != NULL)
1522 cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns);
1525 case OSSL_FUNC_CIPHER_DECRYPT_INIT:
1526 if (cipher->dinit != NULL)
1528 cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns);
1531 case OSSL_FUNC_CIPHER_UPDATE:
1532 if (cipher->cupdate != NULL)
1534 cipher->cupdate = OSSL_FUNC_cipher_update(fns);
1537 case OSSL_FUNC_CIPHER_FINAL:
1538 if (cipher->cfinal != NULL)
1540 cipher->cfinal = OSSL_FUNC_cipher_final(fns);
1543 case OSSL_FUNC_CIPHER_CIPHER:
1544 if (cipher->ccipher != NULL)
1546 cipher->ccipher = OSSL_FUNC_cipher_cipher(fns);
1548 case OSSL_FUNC_CIPHER_FREECTX:
1549 if (cipher->freectx != NULL)
1551 cipher->freectx = OSSL_FUNC_cipher_freectx(fns);
1554 case OSSL_FUNC_CIPHER_DUPCTX:
1555 if (cipher->dupctx != NULL)
1557 cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns);
1559 case OSSL_FUNC_CIPHER_GET_PARAMS:
1560 if (cipher->get_params != NULL)
1562 cipher->get_params = OSSL_FUNC_cipher_get_params(fns);
1564 case OSSL_FUNC_CIPHER_GET_CTX_PARAMS:
1565 if (cipher->get_ctx_params != NULL)
1567 cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns);
1569 case OSSL_FUNC_CIPHER_SET_CTX_PARAMS:
1570 if (cipher->set_ctx_params != NULL)
1572 cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns);
1574 case OSSL_FUNC_CIPHER_GETTABLE_PARAMS:
1575 if (cipher->gettable_params != NULL)
1577 cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns);
1579 case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS:
1580 if (cipher->gettable_ctx_params != NULL)
1582 cipher->gettable_ctx_params =
1583 OSSL_FUNC_cipher_gettable_ctx_params(fns);
1585 case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS:
1586 if (cipher->settable_ctx_params != NULL)
1588 cipher->settable_ctx_params =
1589 OSSL_FUNC_cipher_settable_ctx_params(fns);
1593 if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4)
1594 || (fnciphcnt == 0 && cipher->ccipher == NULL)
1597 * In order to be a consistent set of functions we must have at least
1598 * a complete set of "encrypt" functions, or a complete set of "decrypt"
1599 * functions, or a single "cipher" function. In all cases we need both
1600 * the "newctx" and "freectx" functions.
1602 EVP_CIPHER_free(cipher);
1603 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1606 cipher->prov = prov;
1608 ossl_provider_up_ref(prov);
1610 if (!evp_cipher_cache_constants(cipher)) {
1611 EVP_CIPHER_free(cipher);
1612 ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED);
1619 static int evp_cipher_up_ref(void *cipher)
1621 return EVP_CIPHER_up_ref(cipher);
1624 static void evp_cipher_free(void *cipher)
1626 EVP_CIPHER_free(cipher);
1629 EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
1630 const char *properties)
1632 EVP_CIPHER *cipher =
1633 evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties,
1634 evp_cipher_from_algorithm, evp_cipher_up_ref,
1640 int EVP_CIPHER_up_ref(EVP_CIPHER *cipher)
1644 if (cipher->origin == EVP_ORIG_DYNAMIC)
1645 CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock);
1649 void evp_cipher_free_int(EVP_CIPHER *cipher)
1651 OPENSSL_free(cipher->type_name);
1652 ossl_provider_free(cipher->prov);
1653 CRYPTO_THREAD_lock_free(cipher->lock);
1654 OPENSSL_free(cipher);
1657 void EVP_CIPHER_free(EVP_CIPHER *cipher)
1661 if (cipher == NULL || cipher->origin != EVP_ORIG_DYNAMIC)
1664 CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock);
1667 evp_cipher_free_int(cipher);
1670 void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx,
1671 void (*fn)(EVP_CIPHER *mac, void *arg),
1674 evp_generic_do_all(libctx, OSSL_OP_CIPHER,
1675 (void (*)(void *, void *))fn, arg,
1676 evp_cipher_from_algorithm, evp_cipher_up_ref,