2 * Copyright 1995-2019 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
12 #include "internal/cryptlib.h"
13 #include <openssl/evp.h>
14 #include <openssl/err.h>
15 #include <openssl/rand.h>
16 #include <openssl/rand_drbg.h>
17 #include <openssl/engine.h>
18 #include <openssl/params.h>
19 #include <openssl/core_names.h>
20 #include "crypto/evp.h"
21 #include "internal/provider.h"
22 #include "evp_local.h"
24 int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx)
29 if (ctx->cipher == NULL || ctx->cipher->prov == NULL)
32 if (ctx->provctx != NULL) {
33 if (ctx->cipher->freectx != NULL)
34 ctx->cipher->freectx(ctx->provctx);
37 if (ctx->fetched_cipher != NULL)
38 EVP_CIPHER_free(ctx->fetched_cipher);
39 memset(ctx, 0, sizeof(*ctx));
43 /* TODO(3.0): Remove legacy code below */
46 if (ctx->cipher != NULL) {
47 if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx))
49 /* Cleanse cipher context data */
50 if (ctx->cipher_data && ctx->cipher->ctx_size)
51 OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size);
53 OPENSSL_free(ctx->cipher_data);
54 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
55 ENGINE_finish(ctx->engine);
57 memset(ctx, 0, sizeof(*ctx));
61 EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
63 return OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX));
66 void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
68 EVP_CIPHER_CTX_reset(ctx);
72 int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
73 const unsigned char *key, const unsigned char *iv, int enc)
76 EVP_CIPHER_CTX_reset(ctx);
77 return EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, enc);
80 int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
81 ENGINE *impl, const unsigned char *key,
82 const unsigned char *iv, int enc)
84 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
85 ENGINE *tmpimpl = NULL;
87 const EVP_CIPHER *tmpcipher;
90 * enc == 1 means we are encrypting.
91 * enc == 0 means we are decrypting.
92 * enc == -1 means, use the previously initialised value for encrypt/decrypt
102 if (cipher == NULL && ctx->cipher == NULL) {
103 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_NO_CIPHER_SET);
107 /* TODO(3.0): Legacy work around code below. Remove this */
109 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
111 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
112 * this context may already have an ENGINE! Try to avoid releasing the
113 * previous handle, re-querying for an ENGINE, and having a
114 * reinitialisation, when it may all be unnecessary.
116 if (ctx->engine && ctx->cipher
117 && (cipher == NULL || cipher->nid == ctx->cipher->nid))
120 if (cipher != NULL && impl == NULL) {
121 /* Ask if an ENGINE is reserved for this job */
122 tmpimpl = ENGINE_get_cipher_engine(cipher->nid);
127 * If there are engines involved then we should use legacy handling for now.
129 if (ctx->engine != NULL
130 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
134 if (ctx->cipher == ctx->fetched_cipher)
136 EVP_CIPHER_free(ctx->fetched_cipher);
137 ctx->fetched_cipher = NULL;
141 tmpcipher = (cipher == NULL) ? ctx->cipher : cipher;
143 if (tmpcipher->prov == NULL) {
144 switch(tmpcipher->nid) {
145 case NID_aes_256_ecb:
146 case NID_aes_192_ecb:
147 case NID_aes_128_ecb:
148 case NID_aes_256_cbc:
149 case NID_aes_192_cbc:
150 case NID_aes_128_cbc:
151 case NID_aes_256_ofb128:
152 case NID_aes_192_ofb128:
153 case NID_aes_128_ofb128:
154 case NID_aes_256_cfb128:
155 case NID_aes_192_cfb128:
156 case NID_aes_128_cfb128:
157 case NID_aes_256_cfb1:
158 case NID_aes_192_cfb1:
159 case NID_aes_128_cfb1:
160 case NID_aes_256_cfb8:
161 case NID_aes_192_cfb8:
162 case NID_aes_128_cfb8:
163 case NID_aes_256_ctr:
164 case NID_aes_192_ctr:
165 case NID_aes_128_ctr:
166 case NID_aes_128_xts:
167 case NID_aes_256_xts:
168 case NID_aes_256_ocb:
169 case NID_aes_192_ocb:
170 case NID_aes_128_ocb:
171 case NID_aes_256_gcm:
172 case NID_aes_192_gcm:
173 case NID_aes_128_gcm:
174 case NID_aes_256_siv:
175 case NID_aes_192_siv:
176 case NID_aes_128_siv:
177 case NID_aes_256_cbc_hmac_sha256:
178 case NID_aes_128_cbc_hmac_sha256:
179 case NID_aes_256_cbc_hmac_sha1:
180 case NID_aes_128_cbc_hmac_sha1:
181 case NID_id_aes256_wrap:
182 case NID_id_aes256_wrap_pad:
183 case NID_id_aes192_wrap:
184 case NID_id_aes192_wrap_pad:
185 case NID_id_aes128_wrap:
186 case NID_id_aes128_wrap_pad:
187 case NID_aria_256_gcm:
188 case NID_aria_192_gcm:
189 case NID_aria_128_gcm:
190 case NID_aes_256_ccm:
191 case NID_aes_192_ccm:
192 case NID_aes_128_ccm:
193 case NID_aria_256_ccm:
194 case NID_aria_192_ccm:
195 case NID_aria_128_ccm:
196 case NID_aria_256_ecb:
197 case NID_aria_192_ecb:
198 case NID_aria_128_ecb:
199 case NID_aria_256_cbc:
200 case NID_aria_192_cbc:
201 case NID_aria_128_cbc:
202 case NID_aria_256_ofb128:
203 case NID_aria_192_ofb128:
204 case NID_aria_128_ofb128:
205 case NID_aria_256_cfb128:
206 case NID_aria_192_cfb128:
207 case NID_aria_128_cfb128:
208 case NID_aria_256_cfb1:
209 case NID_aria_192_cfb1:
210 case NID_aria_128_cfb1:
211 case NID_aria_256_cfb8:
212 case NID_aria_192_cfb8:
213 case NID_aria_128_cfb8:
214 case NID_aria_256_ctr:
215 case NID_aria_192_ctr:
216 case NID_aria_128_ctr:
217 case NID_camellia_256_ecb:
218 case NID_camellia_192_ecb:
219 case NID_camellia_128_ecb:
220 case NID_camellia_256_cbc:
221 case NID_camellia_192_cbc:
222 case NID_camellia_128_cbc:
223 case NID_camellia_256_ofb128:
224 case NID_camellia_192_ofb128:
225 case NID_camellia_128_ofb128:
226 case NID_camellia_256_cfb128:
227 case NID_camellia_192_cfb128:
228 case NID_camellia_128_cfb128:
229 case NID_camellia_256_cfb1:
230 case NID_camellia_192_cfb1:
231 case NID_camellia_128_cfb1:
232 case NID_camellia_256_cfb8:
233 case NID_camellia_192_cfb8:
234 case NID_camellia_128_cfb8:
235 case NID_camellia_256_ctr:
236 case NID_camellia_192_ctr:
237 case NID_camellia_128_ctr:
238 case NID_des_ede3_cbc:
239 case NID_des_ede3_ecb:
240 case NID_des_ede3_ofb64:
241 case NID_des_ede3_cfb64:
242 case NID_des_ede3_cfb8:
243 case NID_des_ede3_cfb1:
244 case NID_des_ede_cbc:
245 case NID_des_ede_ecb:
246 case NID_des_ede_ofb64:
247 case NID_des_ede_cfb64:
255 case NID_id_smime_alg_CMS3DESwrap:
266 case NID_cast5_cfb64:
267 case NID_cast5_ofb64:
270 case NID_seed_cfb128:
271 case NID_seed_ofb128:
289 case NID_chacha20_poly1305:
290 case NID_rc4_hmac_md5:
298 * Ensure a context left lying around from last time is cleared
301 if (cipher != NULL && ctx->cipher != NULL) {
302 OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size);
303 ctx->cipher_data = NULL;
307 /* TODO(3.0): Start of non-legacy code below */
309 /* Ensure a context left lying around from last time is cleared */
310 if (cipher != NULL && ctx->cipher != NULL) {
311 unsigned long flags = ctx->flags;
313 EVP_CIPHER_CTX_reset(ctx);
314 /* Restore encrypt and flags */
320 cipher = ctx->cipher;
322 if (cipher->prov == NULL) {
324 /* We only do explicit fetches inside the FIPS module */
325 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
328 EVP_CIPHER *provciph =
329 EVP_CIPHER_fetch(NULL, OBJ_nid2sn(cipher->nid), "");
331 if (provciph == NULL) {
332 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
336 EVP_CIPHER_free(ctx->fetched_cipher);
337 ctx->fetched_cipher = provciph;
341 ctx->cipher = cipher;
342 if (ctx->provctx == NULL) {
343 ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov));
344 if (ctx->provctx == NULL) {
345 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
350 if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) {
352 * If this ctx was already set up for no padding then we need to tell
353 * the new cipher about it.
355 if (!EVP_CIPHER_CTX_set_padding(ctx, 0))
360 if (ctx->cipher->einit == NULL) {
361 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
365 return ctx->cipher->einit(ctx->provctx,
368 : EVP_CIPHER_CTX_key_length(ctx),
371 : EVP_CIPHER_CTX_iv_length(ctx));
374 if (ctx->cipher->dinit == NULL) {
375 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
379 return ctx->cipher->dinit(ctx->provctx,
382 : EVP_CIPHER_CTX_key_length(ctx),
385 : EVP_CIPHER_CTX_iv_length(ctx));
387 /* TODO(3.0): Remove legacy code below */
390 if (cipher != NULL) {
392 * Ensure a context left lying around from last time is cleared (we
393 * previously attempted to avoid this if the same ENGINE and
394 * EVP_CIPHER could be used).
397 unsigned long flags = ctx->flags;
398 EVP_CIPHER_CTX_reset(ctx);
399 /* Restore encrypt and flags */
403 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
405 if (!ENGINE_init(impl)) {
406 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
413 /* There's an ENGINE for this job ... (apparently) */
414 const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
418 * One positive side-effect of US's export control history,
419 * is that we should at least be able to avoid using US
420 * misspellings of "initialisation"?
422 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
425 /* We'll use the ENGINE's private cipher definition */
428 * Store the ENGINE functional reference so we know 'cipher' came
429 * from an ENGINE and we need to release it when done.
437 ctx->cipher = cipher;
438 if (ctx->cipher->ctx_size) {
439 ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
440 if (ctx->cipher_data == NULL) {
442 EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE);
446 ctx->cipher_data = NULL;
448 ctx->key_len = cipher->key_len;
449 /* Preserve wrap enable flag, zero everything else */
450 ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
451 if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
452 if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
454 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
459 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
462 if (ctx->cipher == NULL)
465 /* we assume block size is a power of 2 in *cryptUpdate */
466 OPENSSL_assert(ctx->cipher->block_size == 1
467 || ctx->cipher->block_size == 8
468 || ctx->cipher->block_size == 16);
470 if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
471 && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) {
472 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED);
476 if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) {
477 switch (EVP_CIPHER_CTX_mode(ctx)) {
479 case EVP_CIPH_STREAM_CIPHER:
480 case EVP_CIPH_ECB_MODE:
483 case EVP_CIPH_CFB_MODE:
484 case EVP_CIPH_OFB_MODE:
489 case EVP_CIPH_CBC_MODE:
491 OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <=
492 (int)sizeof(ctx->iv));
494 memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
495 memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
498 case EVP_CIPH_CTR_MODE:
500 /* Don't reuse IV for CTR mode */
502 memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx));
510 if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
511 if (!ctx->cipher->init(ctx, key, iv, enc))
516 ctx->block_mask = ctx->cipher->block_size - 1;
520 int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
521 const unsigned char *in, int inl)
524 return EVP_EncryptUpdate(ctx, out, outl, in, inl);
526 return EVP_DecryptUpdate(ctx, out, outl, in, inl);
529 int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
532 return EVP_EncryptFinal_ex(ctx, out, outl);
534 return EVP_DecryptFinal_ex(ctx, out, outl);
537 int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
540 return EVP_EncryptFinal(ctx, out, outl);
542 return EVP_DecryptFinal(ctx, out, outl);
545 int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
546 const unsigned char *key, const unsigned char *iv)
548 return EVP_CipherInit(ctx, cipher, key, iv, 1);
551 int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
552 ENGINE *impl, const unsigned char *key,
553 const unsigned char *iv)
555 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
558 int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
559 const unsigned char *key, const unsigned char *iv)
561 return EVP_CipherInit(ctx, cipher, key, iv, 0);
564 int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
565 ENGINE *impl, const unsigned char *key,
566 const unsigned char *iv)
568 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
572 * According to the letter of standard difference between pointers
573 * is specified to be valid only within same object. This makes
574 * it formally challenging to determine if input and output buffers
575 * are not partially overlapping with standard pointer arithmetic.
580 #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64
582 * Then we have VMS that distinguishes itself by adhering to
583 * sizeof(size_t)==4 even in 64-bit builds, which means that
584 * difference between two pointers might be truncated to 32 bits.
585 * In the context one can even wonder how comparison for
586 * equality is implemented. To be on the safe side we adhere to
587 * PTRDIFF_T even for comparison for equality.
589 # define PTRDIFF_T uint64_t
591 # define PTRDIFF_T size_t
594 int is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
596 PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2;
598 * Check for partially overlapping buffers. [Binary logical
599 * operations are used instead of boolean to minimize number
600 * of conditional branches.]
602 int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) |
603 (diff > (0 - (PTRDIFF_T)len)));
608 static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
609 unsigned char *out, int *outl,
610 const unsigned char *in, int inl)
612 int i, j, bl, cmpl = inl;
614 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
615 cmpl = (cmpl + 7) / 8;
617 bl = ctx->cipher->block_size;
619 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
620 /* If block size > 1 then the cipher will have to do this check */
621 if (bl == 1 && is_partially_overlapping(out, in, cmpl)) {
622 EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
626 i = ctx->cipher->do_cipher(ctx, out, in, inl);
638 if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
639 EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
643 if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) {
644 if (ctx->cipher->do_cipher(ctx, out, in, inl)) {
653 OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
656 memcpy(&(ctx->buf[i]), in, inl);
662 memcpy(&(ctx->buf[i]), in, j);
665 if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
675 if (!ctx->cipher->do_cipher(ctx, out, in, inl))
681 memcpy(ctx->buf, &(in[inl]), i);
687 int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
688 const unsigned char *in, int inl)
694 /* Prevent accidental use of decryption context when encrypting */
696 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION);
700 if (ctx->cipher == NULL) {
701 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_NO_CIPHER_SET);
705 if (ctx->cipher->prov == NULL)
708 blocksize = EVP_CIPHER_CTX_block_size(ctx);
710 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
711 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR);
714 ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl,
715 inl + (blocksize == 1 ? 0 : blocksize), in,
719 if (soutl > INT_MAX) {
720 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR);
728 /* TODO(3.0): Remove legacy code below */
731 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
734 int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
737 ret = EVP_EncryptFinal_ex(ctx, out, outl);
741 int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
744 unsigned int i, b, bl;
748 /* Prevent accidental use of decryption context when encrypting */
750 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION);
754 if (ctx->cipher == NULL) {
755 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_NO_CIPHER_SET);
758 if (ctx->cipher->prov == NULL)
761 blocksize = EVP_CIPHER_CTX_block_size(ctx);
763 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
764 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR);
768 ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl,
769 blocksize == 1 ? 0 : blocksize);
772 if (soutl > INT_MAX) {
773 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR);
781 /* TODO(3.0): Remove legacy code below */
784 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
785 ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
793 b = ctx->cipher->block_size;
794 OPENSSL_assert(b <= sizeof(ctx->buf));
800 if (ctx->flags & EVP_CIPH_NO_PADDING) {
802 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX,
803 EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
811 for (i = bl; i < b; i++)
813 ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b);
821 int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
822 const unsigned char *in, int inl)
824 int fix_len, cmpl = inl, ret;
829 /* Prevent accidental use of encryption context when decrypting */
831 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION);
835 if (ctx->cipher == NULL) {
836 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_NO_CIPHER_SET);
839 if (ctx->cipher->prov == NULL)
842 blocksize = EVP_CIPHER_CTX_block_size(ctx);
844 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
845 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR);
848 ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl,
849 inl + (blocksize == 1 ? 0 : blocksize), in,
853 if (soutl > INT_MAX) {
854 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR);
862 /* TODO(3.0): Remove legacy code below */
865 b = ctx->cipher->block_size;
867 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
868 cmpl = (cmpl + 7) / 8;
870 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
871 if (b == 1 && is_partially_overlapping(out, in, cmpl)) {
872 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
876 fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
890 if (ctx->flags & EVP_CIPH_NO_PADDING)
891 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
893 OPENSSL_assert(b <= sizeof(ctx->final));
895 if (ctx->final_used) {
896 /* see comment about PTRDIFF_T comparison above */
897 if (((PTRDIFF_T)out == (PTRDIFF_T)in)
898 || is_partially_overlapping(out, in, b)) {
899 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
902 memcpy(out, ctx->final, b);
908 if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl))
912 * if we have 'decrypted' a multiple of block size, make sure we have a
913 * copy of this last block
915 if (b > 1 && !ctx->buf_len) {
918 memcpy(ctx->final, &out[*outl], b);
928 int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
931 ret = EVP_DecryptFinal_ex(ctx, out, outl);
935 int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
943 /* Prevent accidental use of encryption context when decrypting */
945 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION);
949 if (ctx->cipher == NULL) {
950 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_NO_CIPHER_SET);
954 if (ctx->cipher->prov == NULL)
957 blocksize = EVP_CIPHER_CTX_block_size(ctx);
959 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
960 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR);
964 ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl,
965 blocksize == 1 ? 0 : blocksize);
968 if (soutl > INT_MAX) {
969 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR);
977 /* TODO(3.0): Remove legacy code below */
981 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
982 i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
990 b = ctx->cipher->block_size;
991 if (ctx->flags & EVP_CIPH_NO_PADDING) {
993 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,
994 EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
1001 if (ctx->buf_len || !ctx->final_used) {
1002 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
1005 OPENSSL_assert(b <= sizeof(ctx->final));
1008 * The following assumes that the ciphertext has been authenticated.
1009 * Otherwise it provides a padding oracle.
1011 n = ctx->final[b - 1];
1012 if (n == 0 || n > (int)b) {
1013 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT);
1016 for (i = 0; i < n; i++) {
1017 if (ctx->final[--b] != n) {
1018 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT);
1022 n = ctx->cipher->block_size - n;
1023 for (i = 0; i < n; i++)
1024 out[i] = ctx->final[i];
1031 int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
1033 if (c->cipher->prov != NULL) {
1035 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1036 size_t len = keylen;
1038 if (EVP_CIPHER_CTX_key_length(c) == keylen)
1041 /* Check the cipher actually understands this parameter */
1042 if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher),
1043 OSSL_CIPHER_PARAM_KEYLEN) == NULL)
1046 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
1047 ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params);
1049 return ok > 0 ? 1 : 0;
1052 /* TODO(3.0) legacy code follows */
1055 * Note there have never been any built-in ciphers that define this flag
1056 * since it was first introduced.
1058 if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
1059 return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
1060 if (EVP_CIPHER_CTX_key_length(c) == keylen)
1062 if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
1063 c->key_len = keylen;
1066 EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH);
1070 int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
1073 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1074 unsigned int pd = pad;
1077 ctx->flags &= ~EVP_CIPH_NO_PADDING;
1079 ctx->flags |= EVP_CIPH_NO_PADDING;
1081 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd);
1082 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1087 int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1089 int ret = EVP_CTRL_RET_UNSUPPORTED;
1093 OSSL_PARAM params[4] = {
1094 OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
1097 if (ctx == NULL || ctx->cipher == NULL) {
1098 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
1102 if (ctx->cipher->prov == NULL)
1106 case EVP_CTRL_SET_KEY_LENGTH:
1107 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz);
1109 case EVP_CTRL_RAND_KEY: /* Used by DES */
1112 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY,
1118 * TODO(3.0) EVP_CTRL_INIT is purely legacy, no provider counterpart
1119 * As a matter of fact, this should be dead code, but some caller
1120 * might still do a direct control call with this command, so...
1121 * Legacy methods return 1 except for exceptional circumstances, so
1122 * we do the same here to not be disruptive.
1125 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */
1128 case EVP_CTRL_GET_IV:
1130 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV,
1133 case EVP_CTRL_AEAD_SET_IVLEN:
1136 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1138 case EVP_CTRL_AEAD_SET_IV_FIXED:
1139 params[0] = OSSL_PARAM_construct_octet_string(
1140 OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz);
1142 case EVP_CTRL_GCM_IV_GEN:
1145 sz = 0; /* special case that uses the iv length */
1146 params[0] = OSSL_PARAM_construct_octet_string(
1147 OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz);
1149 case EVP_CTRL_GCM_SET_IV_INV:
1152 params[0] = OSSL_PARAM_construct_octet_string(
1153 OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz);
1155 case EVP_CTRL_GET_RC5_ROUNDS:
1156 set_params = 0; /* Fall thru */
1157 case EVP_CTRL_SET_RC5_ROUNDS:
1160 i = (unsigned int)arg;
1161 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i);
1163 case EVP_CTRL_SET_SPEED:
1166 i = (unsigned int)arg;
1167 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i);
1169 case EVP_CTRL_AEAD_GET_TAG:
1170 set_params = 0; /* Fall thru */
1171 case EVP_CTRL_AEAD_SET_TAG:
1172 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
1175 case EVP_CTRL_AEAD_TLS1_AAD:
1176 /* This one does a set and a get - since it returns a size */
1178 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD,
1180 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1184 OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz);
1185 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1189 #ifndef OPENSSL_NO_RC2
1190 case EVP_CTRL_GET_RC2_KEY_BITS:
1191 set_params = 0; /* Fall thru */
1192 case EVP_CTRL_SET_RC2_KEY_BITS:
1193 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz);
1195 #endif /* OPENSSL_NO_RC2 */
1196 #if !defined(OPENSSL_NO_MULTIBLOCK)
1197 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
1198 params[0] = OSSL_PARAM_construct_size_t(
1199 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz);
1200 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1204 params[0] = OSSL_PARAM_construct_size_t(
1205 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz);
1206 params[1] = OSSL_PARAM_construct_end();
1207 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1211 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: {
1212 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1213 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1215 if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
1218 params[0] = OSSL_PARAM_construct_octet_string(
1219 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len);
1220 params[1] = OSSL_PARAM_construct_uint(
1221 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1222 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1225 /* Retrieve the return values changed by the set */
1226 params[0] = OSSL_PARAM_construct_size_t(
1227 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz);
1228 params[1] = OSSL_PARAM_construct_uint(
1229 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1230 params[2] = OSSL_PARAM_construct_end();
1231 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1236 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: {
1237 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1238 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1240 params[0] = OSSL_PARAM_construct_octet_string(
1241 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len);
1243 params[1] = OSSL_PARAM_construct_octet_string(
1244 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp,
1246 params[2] = OSSL_PARAM_construct_uint(
1247 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1248 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1251 params[0] = OSSL_PARAM_construct_size_t(
1252 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz);
1253 params[1] = OSSL_PARAM_construct_end();
1254 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1259 #endif /* OPENSSL_NO_MULTIBLOCK */
1260 case EVP_CTRL_AEAD_SET_MAC_KEY:
1263 params[0] = OSSL_PARAM_construct_octet_string(
1264 OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz);
1269 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1271 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1274 /* TODO(3.0): Remove legacy code below */
1276 if (ctx->cipher->ctrl == NULL) {
1277 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
1281 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
1284 if (ret == EVP_CTRL_RET_UNSUPPORTED) {
1285 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL,
1286 EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
1292 int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[])
1294 if (cipher != NULL && cipher->get_params != NULL)
1295 return cipher->get_params(params);
1299 int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[])
1301 if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL)
1302 return ctx->cipher->set_ctx_params(ctx->provctx, params);
1306 int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[])
1308 if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL)
1309 return ctx->cipher->get_ctx_params(ctx->provctx, params);
1313 const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher)
1315 if (cipher != NULL && cipher->gettable_params != NULL)
1316 return cipher->gettable_params();
1320 const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher)
1322 if (cipher != NULL && cipher->settable_ctx_params != NULL)
1323 return cipher->settable_ctx_params();
1327 const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher)
1329 if (cipher != NULL && cipher->gettable_ctx_params != NULL)
1330 return cipher->gettable_ctx_params();
1334 int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
1336 if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
1337 return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
1345 kl = EVP_CIPHER_CTX_key_length(ctx);
1346 if (kl <= 0 || RAND_priv_bytes(key, kl) <= 0)
1350 #endif /* FIPS_MODE */
1353 int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
1355 if ((in == NULL) || (in->cipher == NULL)) {
1356 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED);
1360 if (in->cipher->prov == NULL)
1363 if (in->cipher->dupctx == NULL) {
1364 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX);
1368 EVP_CIPHER_CTX_reset(out);
1371 out->provctx = NULL;
1373 if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) {
1374 out->fetched_cipher = NULL;
1378 out->provctx = in->cipher->dupctx(in->provctx);
1379 if (out->provctx == NULL) {
1380 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX);
1386 /* TODO(3.0): Remove legacy code below */
1389 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
1390 /* Make sure it's safe to copy a cipher context using an ENGINE */
1391 if (in->engine && !ENGINE_init(in->engine)) {
1392 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB);
1397 EVP_CIPHER_CTX_reset(out);
1398 memcpy(out, in, sizeof(*out));
1400 if (in->cipher_data && in->cipher->ctx_size) {
1401 out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
1402 if (out->cipher_data == NULL) {
1404 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE);
1407 memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
1410 if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
1411 if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
1413 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR);
1419 EVP_CIPHER *evp_cipher_new(void)
1421 EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
1423 if (cipher != NULL) {
1424 cipher->lock = CRYPTO_THREAD_lock_new();
1425 if (cipher->lock == NULL) {
1426 OPENSSL_free(cipher);
1435 * FIPS module note: since internal fetches will be entirely
1436 * provider based, we know that none of its code depends on legacy
1437 * NIDs or any functionality that use them.
1440 /* TODO(3.x) get rid of the need for legacy NIDs */
1441 static void set_legacy_nid(const char *name, void *vlegacy_nid)
1444 int *legacy_nid = vlegacy_nid;
1446 * We use lowest level function to get the associated method, because
1447 * higher level functions such as EVP_get_cipherbyname() have changed
1448 * to look at providers too.
1450 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
1452 if (*legacy_nid == -1) /* We found a clash already */
1454 if (legacy_method == NULL)
1456 nid = EVP_CIPHER_nid(legacy_method);
1457 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
1465 static void *evp_cipher_from_dispatch(const int name_id,
1466 const OSSL_DISPATCH *fns,
1467 OSSL_PROVIDER *prov)
1469 EVP_CIPHER *cipher = NULL;
1470 int fnciphcnt = 0, fnctxcnt = 0;
1472 if ((cipher = evp_cipher_new()) == NULL) {
1473 EVPerr(0, ERR_R_MALLOC_FAILURE);
1478 /* TODO(3.x) get rid of the need for legacy NIDs */
1479 cipher->nid = NID_undef;
1480 evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid);
1481 if (cipher->nid == -1) {
1482 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1483 EVP_CIPHER_free(cipher);
1488 cipher->name_id = name_id;
1490 for (; fns->function_id != 0; fns++) {
1491 switch (fns->function_id) {
1492 case OSSL_FUNC_CIPHER_NEWCTX:
1493 if (cipher->newctx != NULL)
1495 cipher->newctx = OSSL_get_OP_cipher_newctx(fns);
1498 case OSSL_FUNC_CIPHER_ENCRYPT_INIT:
1499 if (cipher->einit != NULL)
1501 cipher->einit = OSSL_get_OP_cipher_encrypt_init(fns);
1504 case OSSL_FUNC_CIPHER_DECRYPT_INIT:
1505 if (cipher->dinit != NULL)
1507 cipher->dinit = OSSL_get_OP_cipher_decrypt_init(fns);
1510 case OSSL_FUNC_CIPHER_UPDATE:
1511 if (cipher->cupdate != NULL)
1513 cipher->cupdate = OSSL_get_OP_cipher_update(fns);
1516 case OSSL_FUNC_CIPHER_FINAL:
1517 if (cipher->cfinal != NULL)
1519 cipher->cfinal = OSSL_get_OP_cipher_final(fns);
1522 case OSSL_FUNC_CIPHER_CIPHER:
1523 if (cipher->ccipher != NULL)
1525 cipher->ccipher = OSSL_get_OP_cipher_cipher(fns);
1527 case OSSL_FUNC_CIPHER_FREECTX:
1528 if (cipher->freectx != NULL)
1530 cipher->freectx = OSSL_get_OP_cipher_freectx(fns);
1533 case OSSL_FUNC_CIPHER_DUPCTX:
1534 if (cipher->dupctx != NULL)
1536 cipher->dupctx = OSSL_get_OP_cipher_dupctx(fns);
1538 case OSSL_FUNC_CIPHER_GET_PARAMS:
1539 if (cipher->get_params != NULL)
1541 cipher->get_params = OSSL_get_OP_cipher_get_params(fns);
1543 case OSSL_FUNC_CIPHER_GET_CTX_PARAMS:
1544 if (cipher->get_ctx_params != NULL)
1546 cipher->get_ctx_params = OSSL_get_OP_cipher_get_ctx_params(fns);
1548 case OSSL_FUNC_CIPHER_SET_CTX_PARAMS:
1549 if (cipher->set_ctx_params != NULL)
1551 cipher->set_ctx_params = OSSL_get_OP_cipher_set_ctx_params(fns);
1553 case OSSL_FUNC_CIPHER_GETTABLE_PARAMS:
1554 if (cipher->gettable_params != NULL)
1556 cipher->gettable_params = OSSL_get_OP_cipher_gettable_params(fns);
1558 case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS:
1559 if (cipher->gettable_ctx_params != NULL)
1561 cipher->gettable_ctx_params =
1562 OSSL_get_OP_cipher_gettable_ctx_params(fns);
1564 case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS:
1565 if (cipher->settable_ctx_params != NULL)
1567 cipher->settable_ctx_params =
1568 OSSL_get_OP_cipher_settable_ctx_params(fns);
1572 if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4)
1573 || (fnciphcnt == 0 && cipher->ccipher == NULL)
1576 * In order to be a consistent set of functions we must have at least
1577 * a complete set of "encrypt" functions, or a complete set of "decrypt"
1578 * functions, or a single "cipher" function. In all cases we need both
1579 * the "newctx" and "freectx" functions.
1581 EVP_CIPHER_free(cipher);
1582 EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1585 cipher->prov = prov;
1587 ossl_provider_up_ref(prov);
1592 static int evp_cipher_up_ref(void *cipher)
1594 return EVP_CIPHER_up_ref(cipher);
1597 static void evp_cipher_free(void *cipher)
1599 EVP_CIPHER_free(cipher);
1602 EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm,
1603 const char *properties)
1605 EVP_CIPHER *cipher =
1606 evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties,
1607 evp_cipher_from_dispatch, evp_cipher_up_ref,
1610 if (cipher != NULL && !evp_cipher_cache_constants(cipher)) {
1611 EVP_CIPHER_free(cipher);
1617 int EVP_CIPHER_up_ref(EVP_CIPHER *cipher)
1621 CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock);
1625 void EVP_CIPHER_free(EVP_CIPHER *cipher)
1632 CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock);
1635 ossl_provider_free(cipher->prov);
1636 CRYPTO_THREAD_lock_free(cipher->lock);
1637 OPENSSL_free(cipher);
1640 void EVP_CIPHER_do_all_provided(OPENSSL_CTX *libctx,
1641 void (*fn)(EVP_CIPHER *mac, void *arg),
1644 evp_generic_do_all(libctx, OSSL_OP_CIPHER,
1645 (void (*)(void *, void *))fn, arg,
1646 evp_cipher_from_dispatch, evp_cipher_free);