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) {
146 case NID_aes_256_ecb:
147 case NID_aes_192_ecb:
148 case NID_aes_128_ecb:
149 case NID_aes_256_cbc:
150 case NID_aes_192_cbc:
151 case NID_aes_128_cbc:
152 case NID_aes_256_ofb128:
153 case NID_aes_192_ofb128:
154 case NID_aes_128_ofb128:
155 case NID_aes_256_cfb128:
156 case NID_aes_192_cfb128:
157 case NID_aes_128_cfb128:
158 case NID_aes_256_cfb1:
159 case NID_aes_192_cfb1:
160 case NID_aes_128_cfb1:
161 case NID_aes_256_cfb8:
162 case NID_aes_192_cfb8:
163 case NID_aes_128_cfb8:
164 case NID_aes_256_ctr:
165 case NID_aes_192_ctr:
166 case NID_aes_128_ctr:
167 case NID_aes_128_xts:
168 case NID_aes_256_xts:
169 case NID_aes_256_ocb:
170 case NID_aes_192_ocb:
171 case NID_aes_128_ocb:
172 case NID_aes_256_gcm:
173 case NID_aes_192_gcm:
174 case NID_aes_128_gcm:
175 case NID_aes_256_siv:
176 case NID_aes_192_siv:
177 case NID_aes_128_siv:
178 case NID_aes_256_cbc_hmac_sha256:
179 case NID_aes_128_cbc_hmac_sha256:
180 case NID_aes_256_cbc_hmac_sha1:
181 case NID_aes_128_cbc_hmac_sha1:
182 case NID_id_aes256_wrap:
183 case NID_id_aes256_wrap_pad:
184 case NID_id_aes192_wrap:
185 case NID_id_aes192_wrap_pad:
186 case NID_id_aes128_wrap:
187 case NID_id_aes128_wrap_pad:
188 case NID_aria_256_gcm:
189 case NID_aria_192_gcm:
190 case NID_aria_128_gcm:
191 case NID_aes_256_ccm:
192 case NID_aes_192_ccm:
193 case NID_aes_128_ccm:
194 case NID_aria_256_ccm:
195 case NID_aria_192_ccm:
196 case NID_aria_128_ccm:
197 case NID_aria_256_ecb:
198 case NID_aria_192_ecb:
199 case NID_aria_128_ecb:
200 case NID_aria_256_cbc:
201 case NID_aria_192_cbc:
202 case NID_aria_128_cbc:
203 case NID_aria_256_ofb128:
204 case NID_aria_192_ofb128:
205 case NID_aria_128_ofb128:
206 case NID_aria_256_cfb128:
207 case NID_aria_192_cfb128:
208 case NID_aria_128_cfb128:
209 case NID_aria_256_cfb1:
210 case NID_aria_192_cfb1:
211 case NID_aria_128_cfb1:
212 case NID_aria_256_cfb8:
213 case NID_aria_192_cfb8:
214 case NID_aria_128_cfb8:
215 case NID_aria_256_ctr:
216 case NID_aria_192_ctr:
217 case NID_aria_128_ctr:
218 case NID_camellia_256_ecb:
219 case NID_camellia_192_ecb:
220 case NID_camellia_128_ecb:
221 case NID_camellia_256_cbc:
222 case NID_camellia_192_cbc:
223 case NID_camellia_128_cbc:
224 case NID_camellia_256_ofb128:
225 case NID_camellia_192_ofb128:
226 case NID_camellia_128_ofb128:
227 case NID_camellia_256_cfb128:
228 case NID_camellia_192_cfb128:
229 case NID_camellia_128_cfb128:
230 case NID_camellia_256_cfb1:
231 case NID_camellia_192_cfb1:
232 case NID_camellia_128_cfb1:
233 case NID_camellia_256_cfb8:
234 case NID_camellia_192_cfb8:
235 case NID_camellia_128_cfb8:
236 case NID_camellia_256_ctr:
237 case NID_camellia_192_ctr:
238 case NID_camellia_128_ctr:
239 case NID_des_ede3_cbc:
240 case NID_des_ede3_ecb:
241 case NID_des_ede3_ofb64:
242 case NID_des_ede3_cfb64:
243 case NID_des_ede3_cfb8:
244 case NID_des_ede3_cfb1:
245 case NID_des_ede_cbc:
246 case NID_des_ede_ecb:
247 case NID_des_ede_ofb64:
248 case NID_des_ede_cfb64:
256 case NID_id_smime_alg_CMS3DESwrap:
267 case NID_cast5_cfb64:
268 case NID_cast5_ofb64:
271 case NID_seed_cfb128:
272 case NID_seed_ofb128:
290 case NID_chacha20_poly1305:
291 case NID_rc4_hmac_md5:
299 * Ensure a context left lying around from last time is cleared
302 if (cipher != NULL && ctx->cipher != NULL) {
303 OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size);
304 ctx->cipher_data = NULL;
308 /* TODO(3.0): Start of non-legacy code below */
310 /* Ensure a context left lying around from last time is cleared */
311 if (cipher != NULL && ctx->cipher != NULL) {
312 unsigned long flags = ctx->flags;
314 EVP_CIPHER_CTX_reset(ctx);
315 /* Restore encrypt and flags */
321 cipher = ctx->cipher;
323 if (cipher->prov == NULL) {
325 /* We only do explicit fetches inside the FIPS module */
326 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
329 EVP_CIPHER *provciph =
330 EVP_CIPHER_fetch(NULL,
331 cipher->nid == NID_undef ? "NULL"
332 : OBJ_nid2sn(cipher->nid),
335 if (provciph == NULL) {
336 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
340 EVP_CIPHER_free(ctx->fetched_cipher);
341 ctx->fetched_cipher = provciph;
345 ctx->cipher = cipher;
346 if (ctx->provctx == NULL) {
347 ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov));
348 if (ctx->provctx == NULL) {
349 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
354 if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) {
356 * If this ctx was already set up for no padding then we need to tell
357 * the new cipher about it.
359 if (!EVP_CIPHER_CTX_set_padding(ctx, 0))
364 if (ctx->cipher->einit == NULL) {
365 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
369 return ctx->cipher->einit(ctx->provctx,
372 : EVP_CIPHER_CTX_key_length(ctx),
375 : EVP_CIPHER_CTX_iv_length(ctx));
378 if (ctx->cipher->dinit == NULL) {
379 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
383 return ctx->cipher->dinit(ctx->provctx,
386 : EVP_CIPHER_CTX_key_length(ctx),
389 : EVP_CIPHER_CTX_iv_length(ctx));
391 /* TODO(3.0): Remove legacy code below */
394 if (cipher != NULL) {
396 * Ensure a context left lying around from last time is cleared (we
397 * previously attempted to avoid this if the same ENGINE and
398 * EVP_CIPHER could be used).
401 unsigned long flags = ctx->flags;
402 EVP_CIPHER_CTX_reset(ctx);
403 /* Restore encrypt and flags */
407 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
409 if (!ENGINE_init(impl)) {
410 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
417 /* There's an ENGINE for this job ... (apparently) */
418 const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
422 * One positive side-effect of US's export control history,
423 * is that we should at least be able to avoid using US
424 * misspellings of "initialisation"?
426 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
429 /* We'll use the ENGINE's private cipher definition */
432 * Store the ENGINE functional reference so we know 'cipher' came
433 * from an ENGINE and we need to release it when done.
441 ctx->cipher = cipher;
442 if (ctx->cipher->ctx_size) {
443 ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
444 if (ctx->cipher_data == NULL) {
446 EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE);
450 ctx->cipher_data = NULL;
452 ctx->key_len = cipher->key_len;
453 /* Preserve wrap enable flag, zero everything else */
454 ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
455 if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
456 if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
458 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
463 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
466 if (ctx->cipher == NULL)
469 /* we assume block size is a power of 2 in *cryptUpdate */
470 OPENSSL_assert(ctx->cipher->block_size == 1
471 || ctx->cipher->block_size == 8
472 || ctx->cipher->block_size == 16);
474 if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
475 && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) {
476 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED);
480 if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) {
481 switch (EVP_CIPHER_CTX_mode(ctx)) {
483 case EVP_CIPH_STREAM_CIPHER:
484 case EVP_CIPH_ECB_MODE:
487 case EVP_CIPH_CFB_MODE:
488 case EVP_CIPH_OFB_MODE:
493 case EVP_CIPH_CBC_MODE:
495 OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <=
496 (int)sizeof(ctx->iv));
498 memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
499 memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
502 case EVP_CIPH_CTR_MODE:
504 /* Don't reuse IV for CTR mode */
506 memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx));
514 if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
515 if (!ctx->cipher->init(ctx, key, iv, enc))
520 ctx->block_mask = ctx->cipher->block_size - 1;
524 int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
525 const unsigned char *in, int inl)
528 return EVP_EncryptUpdate(ctx, out, outl, in, inl);
530 return EVP_DecryptUpdate(ctx, out, outl, in, inl);
533 int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
536 return EVP_EncryptFinal_ex(ctx, out, outl);
538 return EVP_DecryptFinal_ex(ctx, out, outl);
541 int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
544 return EVP_EncryptFinal(ctx, out, outl);
546 return EVP_DecryptFinal(ctx, out, outl);
549 int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
550 const unsigned char *key, const unsigned char *iv)
552 return EVP_CipherInit(ctx, cipher, key, iv, 1);
555 int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
556 ENGINE *impl, const unsigned char *key,
557 const unsigned char *iv)
559 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
562 int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
563 const unsigned char *key, const unsigned char *iv)
565 return EVP_CipherInit(ctx, cipher, key, iv, 0);
568 int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
569 ENGINE *impl, const unsigned char *key,
570 const unsigned char *iv)
572 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
576 * According to the letter of standard difference between pointers
577 * is specified to be valid only within same object. This makes
578 * it formally challenging to determine if input and output buffers
579 * are not partially overlapping with standard pointer arithmetic.
584 #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64
586 * Then we have VMS that distinguishes itself by adhering to
587 * sizeof(size_t)==4 even in 64-bit builds, which means that
588 * difference between two pointers might be truncated to 32 bits.
589 * In the context one can even wonder how comparison for
590 * equality is implemented. To be on the safe side we adhere to
591 * PTRDIFF_T even for comparison for equality.
593 # define PTRDIFF_T uint64_t
595 # define PTRDIFF_T size_t
598 int is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
600 PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2;
602 * Check for partially overlapping buffers. [Binary logical
603 * operations are used instead of boolean to minimize number
604 * of conditional branches.]
606 int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) |
607 (diff > (0 - (PTRDIFF_T)len)));
612 static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
613 unsigned char *out, int *outl,
614 const unsigned char *in, int inl)
616 int i, j, bl, cmpl = inl;
618 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
619 cmpl = (cmpl + 7) / 8;
621 bl = ctx->cipher->block_size;
623 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
624 /* If block size > 1 then the cipher will have to do this check */
625 if (bl == 1 && is_partially_overlapping(out, in, cmpl)) {
626 EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
630 i = ctx->cipher->do_cipher(ctx, out, in, inl);
642 if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
643 EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
647 if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) {
648 if (ctx->cipher->do_cipher(ctx, out, in, inl)) {
657 OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
660 memcpy(&(ctx->buf[i]), in, inl);
666 memcpy(&(ctx->buf[i]), in, j);
669 if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
679 if (!ctx->cipher->do_cipher(ctx, out, in, inl))
685 memcpy(ctx->buf, &(in[inl]), i);
691 int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
692 const unsigned char *in, int inl)
698 /* Prevent accidental use of decryption context when encrypting */
700 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION);
704 if (ctx->cipher == NULL) {
705 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_NO_CIPHER_SET);
709 if (ctx->cipher->prov == NULL)
712 blocksize = EVP_CIPHER_CTX_block_size(ctx);
714 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
715 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR);
718 ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl,
719 inl + (blocksize == 1 ? 0 : blocksize), in,
723 if (soutl > INT_MAX) {
724 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR);
732 /* TODO(3.0): Remove legacy code below */
735 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
738 int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
741 ret = EVP_EncryptFinal_ex(ctx, out, outl);
745 int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
748 unsigned int i, b, bl;
752 /* Prevent accidental use of decryption context when encrypting */
754 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION);
758 if (ctx->cipher == NULL) {
759 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_NO_CIPHER_SET);
762 if (ctx->cipher->prov == NULL)
765 blocksize = EVP_CIPHER_CTX_block_size(ctx);
767 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
768 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR);
772 ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl,
773 blocksize == 1 ? 0 : blocksize);
776 if (soutl > INT_MAX) {
777 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR);
785 /* TODO(3.0): Remove legacy code below */
788 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
789 ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
797 b = ctx->cipher->block_size;
798 OPENSSL_assert(b <= sizeof(ctx->buf));
804 if (ctx->flags & EVP_CIPH_NO_PADDING) {
806 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX,
807 EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
815 for (i = bl; i < b; i++)
817 ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b);
825 int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
826 const unsigned char *in, int inl)
828 int fix_len, cmpl = inl, ret;
833 /* Prevent accidental use of encryption context when decrypting */
835 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION);
839 if (ctx->cipher == NULL) {
840 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_NO_CIPHER_SET);
843 if (ctx->cipher->prov == NULL)
846 blocksize = EVP_CIPHER_CTX_block_size(ctx);
848 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
849 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR);
852 ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl,
853 inl + (blocksize == 1 ? 0 : blocksize), in,
857 if (soutl > INT_MAX) {
858 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR);
866 /* TODO(3.0): Remove legacy code below */
869 b = ctx->cipher->block_size;
871 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
872 cmpl = (cmpl + 7) / 8;
874 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
875 if (b == 1 && is_partially_overlapping(out, in, cmpl)) {
876 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
880 fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
894 if (ctx->flags & EVP_CIPH_NO_PADDING)
895 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
897 OPENSSL_assert(b <= sizeof(ctx->final));
899 if (ctx->final_used) {
900 /* see comment about PTRDIFF_T comparison above */
901 if (((PTRDIFF_T)out == (PTRDIFF_T)in)
902 || is_partially_overlapping(out, in, b)) {
903 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
906 memcpy(out, ctx->final, b);
912 if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl))
916 * if we have 'decrypted' a multiple of block size, make sure we have a
917 * copy of this last block
919 if (b > 1 && !ctx->buf_len) {
922 memcpy(ctx->final, &out[*outl], b);
932 int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
935 ret = EVP_DecryptFinal_ex(ctx, out, outl);
939 int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
947 /* Prevent accidental use of encryption context when decrypting */
949 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION);
953 if (ctx->cipher == NULL) {
954 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_NO_CIPHER_SET);
958 if (ctx->cipher->prov == NULL)
961 blocksize = EVP_CIPHER_CTX_block_size(ctx);
963 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
964 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR);
968 ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl,
969 blocksize == 1 ? 0 : blocksize);
972 if (soutl > INT_MAX) {
973 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR);
981 /* TODO(3.0): Remove legacy code below */
985 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
986 i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
994 b = ctx->cipher->block_size;
995 if (ctx->flags & EVP_CIPH_NO_PADDING) {
997 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,
998 EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
1005 if (ctx->buf_len || !ctx->final_used) {
1006 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
1009 OPENSSL_assert(b <= sizeof(ctx->final));
1012 * The following assumes that the ciphertext has been authenticated.
1013 * Otherwise it provides a padding oracle.
1015 n = ctx->final[b - 1];
1016 if (n == 0 || n > (int)b) {
1017 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT);
1020 for (i = 0; i < n; i++) {
1021 if (ctx->final[--b] != n) {
1022 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT);
1026 n = ctx->cipher->block_size - n;
1027 for (i = 0; i < n; i++)
1028 out[i] = ctx->final[i];
1035 int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
1037 if (c->cipher->prov != NULL) {
1039 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1040 size_t len = keylen;
1042 if (EVP_CIPHER_CTX_key_length(c) == keylen)
1045 /* Check the cipher actually understands this parameter */
1046 if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher),
1047 OSSL_CIPHER_PARAM_KEYLEN) == NULL)
1050 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
1051 ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params);
1053 return ok > 0 ? 1 : 0;
1056 /* TODO(3.0) legacy code follows */
1059 * Note there have never been any built-in ciphers that define this flag
1060 * since it was first introduced.
1062 if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
1063 return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
1064 if (EVP_CIPHER_CTX_key_length(c) == keylen)
1066 if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
1067 c->key_len = keylen;
1070 EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH);
1074 int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
1077 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1078 unsigned int pd = pad;
1081 ctx->flags &= ~EVP_CIPH_NO_PADDING;
1083 ctx->flags |= EVP_CIPH_NO_PADDING;
1085 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd);
1086 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1091 int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1093 int ret = EVP_CTRL_RET_UNSUPPORTED;
1097 OSSL_PARAM params[4] = {
1098 OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
1101 if (ctx == NULL || ctx->cipher == NULL) {
1102 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
1106 if (ctx->cipher->prov == NULL)
1110 case EVP_CTRL_SET_KEY_LENGTH:
1111 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz);
1113 case EVP_CTRL_RAND_KEY: /* Used by DES */
1116 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY,
1122 * TODO(3.0) EVP_CTRL_INIT is purely legacy, no provider counterpart
1123 * As a matter of fact, this should be dead code, but some caller
1124 * might still do a direct control call with this command, so...
1125 * Legacy methods return 1 except for exceptional circumstances, so
1126 * we do the same here to not be disruptive.
1129 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */
1132 case EVP_CTRL_GET_IV:
1134 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV,
1137 case EVP_CTRL_AEAD_SET_IVLEN:
1140 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1142 case EVP_CTRL_AEAD_SET_IV_FIXED:
1143 params[0] = OSSL_PARAM_construct_octet_string(
1144 OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz);
1146 case EVP_CTRL_GCM_IV_GEN:
1149 sz = 0; /* special case that uses the iv length */
1150 params[0] = OSSL_PARAM_construct_octet_string(
1151 OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz);
1153 case EVP_CTRL_GCM_SET_IV_INV:
1156 params[0] = OSSL_PARAM_construct_octet_string(
1157 OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz);
1159 case EVP_CTRL_GET_RC5_ROUNDS:
1160 set_params = 0; /* Fall thru */
1161 case EVP_CTRL_SET_RC5_ROUNDS:
1164 i = (unsigned int)arg;
1165 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i);
1167 case EVP_CTRL_SET_SPEED:
1170 i = (unsigned int)arg;
1171 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i);
1173 case EVP_CTRL_AEAD_GET_TAG:
1174 set_params = 0; /* Fall thru */
1175 case EVP_CTRL_AEAD_SET_TAG:
1176 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
1179 case EVP_CTRL_AEAD_TLS1_AAD:
1180 /* This one does a set and a get - since it returns a size */
1182 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD,
1184 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1188 OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz);
1189 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1193 #ifndef OPENSSL_NO_RC2
1194 case EVP_CTRL_GET_RC2_KEY_BITS:
1195 set_params = 0; /* Fall thru */
1196 case EVP_CTRL_SET_RC2_KEY_BITS:
1197 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz);
1199 #endif /* OPENSSL_NO_RC2 */
1200 #if !defined(OPENSSL_NO_MULTIBLOCK)
1201 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
1202 params[0] = OSSL_PARAM_construct_size_t(
1203 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz);
1204 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1208 params[0] = OSSL_PARAM_construct_size_t(
1209 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz);
1210 params[1] = OSSL_PARAM_construct_end();
1211 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1215 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: {
1216 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1217 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1219 if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
1222 params[0] = OSSL_PARAM_construct_octet_string(
1223 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len);
1224 params[1] = OSSL_PARAM_construct_uint(
1225 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1226 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1229 /* Retrieve the return values changed by the set */
1230 params[0] = OSSL_PARAM_construct_size_t(
1231 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz);
1232 params[1] = OSSL_PARAM_construct_uint(
1233 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1234 params[2] = OSSL_PARAM_construct_end();
1235 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1240 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: {
1241 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1242 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1244 params[0] = OSSL_PARAM_construct_octet_string(
1245 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len);
1247 params[1] = OSSL_PARAM_construct_octet_string(
1248 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp,
1250 params[2] = OSSL_PARAM_construct_uint(
1251 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1252 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1255 params[0] = OSSL_PARAM_construct_size_t(
1256 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz);
1257 params[1] = OSSL_PARAM_construct_end();
1258 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1263 #endif /* OPENSSL_NO_MULTIBLOCK */
1264 case EVP_CTRL_AEAD_SET_MAC_KEY:
1267 params[0] = OSSL_PARAM_construct_octet_string(
1268 OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz);
1273 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1275 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1278 /* TODO(3.0): Remove legacy code below */
1280 if (ctx->cipher->ctrl == NULL) {
1281 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
1285 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
1288 if (ret == EVP_CTRL_RET_UNSUPPORTED) {
1289 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL,
1290 EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
1296 int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[])
1298 if (cipher != NULL && cipher->get_params != NULL)
1299 return cipher->get_params(params);
1303 int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[])
1305 if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL)
1306 return ctx->cipher->set_ctx_params(ctx->provctx, params);
1310 int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[])
1312 if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL)
1313 return ctx->cipher->get_ctx_params(ctx->provctx, params);
1317 const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher)
1319 if (cipher != NULL && cipher->gettable_params != NULL)
1320 return cipher->gettable_params();
1324 const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher)
1326 if (cipher != NULL && cipher->settable_ctx_params != NULL)
1327 return cipher->settable_ctx_params();
1331 const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher)
1333 if (cipher != NULL && cipher->gettable_ctx_params != NULL)
1334 return cipher->gettable_ctx_params();
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);
1349 kl = EVP_CIPHER_CTX_key_length(ctx);
1350 if (kl <= 0 || RAND_priv_bytes(key, kl) <= 0)
1354 #endif /* FIPS_MODE */
1357 int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
1359 if ((in == NULL) || (in->cipher == NULL)) {
1360 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED);
1364 if (in->cipher->prov == NULL)
1367 if (in->cipher->dupctx == NULL) {
1368 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX);
1372 EVP_CIPHER_CTX_reset(out);
1375 out->provctx = NULL;
1377 if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) {
1378 out->fetched_cipher = NULL;
1382 out->provctx = in->cipher->dupctx(in->provctx);
1383 if (out->provctx == NULL) {
1384 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX);
1390 /* TODO(3.0): Remove legacy code below */
1393 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
1394 /* Make sure it's safe to copy a cipher context using an ENGINE */
1395 if (in->engine && !ENGINE_init(in->engine)) {
1396 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB);
1401 EVP_CIPHER_CTX_reset(out);
1402 memcpy(out, in, sizeof(*out));
1404 if (in->cipher_data && in->cipher->ctx_size) {
1405 out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
1406 if (out->cipher_data == NULL) {
1408 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE);
1411 memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
1414 if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
1415 if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
1417 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR);
1423 EVP_CIPHER *evp_cipher_new(void)
1425 EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
1427 if (cipher != NULL) {
1428 cipher->lock = CRYPTO_THREAD_lock_new();
1429 if (cipher->lock == NULL) {
1430 OPENSSL_free(cipher);
1439 * FIPS module note: since internal fetches will be entirely
1440 * provider based, we know that none of its code depends on legacy
1441 * NIDs or any functionality that use them.
1444 /* TODO(3.x) get rid of the need for legacy NIDs */
1445 static void set_legacy_nid(const char *name, void *vlegacy_nid)
1448 int *legacy_nid = vlegacy_nid;
1450 * We use lowest level function to get the associated method, because
1451 * higher level functions such as EVP_get_cipherbyname() have changed
1452 * to look at providers too.
1454 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
1456 if (*legacy_nid == -1) /* We found a clash already */
1458 if (legacy_method == NULL)
1460 nid = EVP_CIPHER_nid(legacy_method);
1461 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
1469 static void *evp_cipher_from_dispatch(const int name_id,
1470 const OSSL_DISPATCH *fns,
1471 OSSL_PROVIDER *prov)
1473 EVP_CIPHER *cipher = NULL;
1474 int fnciphcnt = 0, fnctxcnt = 0;
1476 if ((cipher = evp_cipher_new()) == NULL) {
1477 EVPerr(0, ERR_R_MALLOC_FAILURE);
1482 /* TODO(3.x) get rid of the need for legacy NIDs */
1483 cipher->nid = NID_undef;
1484 evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid);
1485 if (cipher->nid == -1) {
1486 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1487 EVP_CIPHER_free(cipher);
1492 cipher->name_id = name_id;
1494 for (; fns->function_id != 0; fns++) {
1495 switch (fns->function_id) {
1496 case OSSL_FUNC_CIPHER_NEWCTX:
1497 if (cipher->newctx != NULL)
1499 cipher->newctx = OSSL_get_OP_cipher_newctx(fns);
1502 case OSSL_FUNC_CIPHER_ENCRYPT_INIT:
1503 if (cipher->einit != NULL)
1505 cipher->einit = OSSL_get_OP_cipher_encrypt_init(fns);
1508 case OSSL_FUNC_CIPHER_DECRYPT_INIT:
1509 if (cipher->dinit != NULL)
1511 cipher->dinit = OSSL_get_OP_cipher_decrypt_init(fns);
1514 case OSSL_FUNC_CIPHER_UPDATE:
1515 if (cipher->cupdate != NULL)
1517 cipher->cupdate = OSSL_get_OP_cipher_update(fns);
1520 case OSSL_FUNC_CIPHER_FINAL:
1521 if (cipher->cfinal != NULL)
1523 cipher->cfinal = OSSL_get_OP_cipher_final(fns);
1526 case OSSL_FUNC_CIPHER_CIPHER:
1527 if (cipher->ccipher != NULL)
1529 cipher->ccipher = OSSL_get_OP_cipher_cipher(fns);
1531 case OSSL_FUNC_CIPHER_FREECTX:
1532 if (cipher->freectx != NULL)
1534 cipher->freectx = OSSL_get_OP_cipher_freectx(fns);
1537 case OSSL_FUNC_CIPHER_DUPCTX:
1538 if (cipher->dupctx != NULL)
1540 cipher->dupctx = OSSL_get_OP_cipher_dupctx(fns);
1542 case OSSL_FUNC_CIPHER_GET_PARAMS:
1543 if (cipher->get_params != NULL)
1545 cipher->get_params = OSSL_get_OP_cipher_get_params(fns);
1547 case OSSL_FUNC_CIPHER_GET_CTX_PARAMS:
1548 if (cipher->get_ctx_params != NULL)
1550 cipher->get_ctx_params = OSSL_get_OP_cipher_get_ctx_params(fns);
1552 case OSSL_FUNC_CIPHER_SET_CTX_PARAMS:
1553 if (cipher->set_ctx_params != NULL)
1555 cipher->set_ctx_params = OSSL_get_OP_cipher_set_ctx_params(fns);
1557 case OSSL_FUNC_CIPHER_GETTABLE_PARAMS:
1558 if (cipher->gettable_params != NULL)
1560 cipher->gettable_params = OSSL_get_OP_cipher_gettable_params(fns);
1562 case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS:
1563 if (cipher->gettable_ctx_params != NULL)
1565 cipher->gettable_ctx_params =
1566 OSSL_get_OP_cipher_gettable_ctx_params(fns);
1568 case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS:
1569 if (cipher->settable_ctx_params != NULL)
1571 cipher->settable_ctx_params =
1572 OSSL_get_OP_cipher_settable_ctx_params(fns);
1576 if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4)
1577 || (fnciphcnt == 0 && cipher->ccipher == NULL)
1580 * In order to be a consistent set of functions we must have at least
1581 * a complete set of "encrypt" functions, or a complete set of "decrypt"
1582 * functions, or a single "cipher" function. In all cases we need both
1583 * the "newctx" and "freectx" functions.
1585 EVP_CIPHER_free(cipher);
1586 EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1589 cipher->prov = prov;
1591 ossl_provider_up_ref(prov);
1596 static int evp_cipher_up_ref(void *cipher)
1598 return EVP_CIPHER_up_ref(cipher);
1601 static void evp_cipher_free(void *cipher)
1603 EVP_CIPHER_free(cipher);
1606 EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm,
1607 const char *properties)
1609 EVP_CIPHER *cipher =
1610 evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties,
1611 evp_cipher_from_dispatch, evp_cipher_up_ref,
1614 if (cipher != NULL && !evp_cipher_cache_constants(cipher)) {
1615 EVP_CIPHER_free(cipher);
1621 int EVP_CIPHER_up_ref(EVP_CIPHER *cipher)
1625 CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock);
1629 void EVP_CIPHER_free(EVP_CIPHER *cipher)
1636 CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock);
1639 ossl_provider_free(cipher->prov);
1640 CRYPTO_THREAD_lock_free(cipher->lock);
1641 OPENSSL_free(cipher);
1644 void EVP_CIPHER_do_all_provided(OPENSSL_CTX *libctx,
1645 void (*fn)(EVP_CIPHER *mac, void *arg),
1648 evp_generic_do_all(libctx, OSSL_OP_CIPHER,
1649 (void (*)(void *, void *))fn, arg,
1650 evp_cipher_from_dispatch, evp_cipher_free);