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_id_aes256_wrap
:
178 case NID_id_aes256_wrap_pad
:
179 case NID_id_aes192_wrap
:
180 case NID_id_aes192_wrap_pad
:
181 case NID_id_aes128_wrap
:
182 case NID_id_aes128_wrap_pad
:
183 case NID_aria_256_gcm
:
184 case NID_aria_192_gcm
:
185 case NID_aria_128_gcm
:
186 case NID_aes_256_ccm
:
187 case NID_aes_192_ccm
:
188 case NID_aes_128_ccm
:
189 case NID_aria_256_ccm
:
190 case NID_aria_192_ccm
:
191 case NID_aria_128_ccm
:
192 case NID_aria_256_ecb
:
193 case NID_aria_192_ecb
:
194 case NID_aria_128_ecb
:
195 case NID_aria_256_cbc
:
196 case NID_aria_192_cbc
:
197 case NID_aria_128_cbc
:
198 case NID_aria_256_ofb128
:
199 case NID_aria_192_ofb128
:
200 case NID_aria_128_ofb128
:
201 case NID_aria_256_cfb128
:
202 case NID_aria_192_cfb128
:
203 case NID_aria_128_cfb128
:
204 case NID_aria_256_cfb1
:
205 case NID_aria_192_cfb1
:
206 case NID_aria_128_cfb1
:
207 case NID_aria_256_cfb8
:
208 case NID_aria_192_cfb8
:
209 case NID_aria_128_cfb8
:
210 case NID_aria_256_ctr
:
211 case NID_aria_192_ctr
:
212 case NID_aria_128_ctr
:
213 case NID_camellia_256_ecb
:
214 case NID_camellia_192_ecb
:
215 case NID_camellia_128_ecb
:
216 case NID_camellia_256_cbc
:
217 case NID_camellia_192_cbc
:
218 case NID_camellia_128_cbc
:
219 case NID_camellia_256_ofb128
:
220 case NID_camellia_192_ofb128
:
221 case NID_camellia_128_ofb128
:
222 case NID_camellia_256_cfb128
:
223 case NID_camellia_192_cfb128
:
224 case NID_camellia_128_cfb128
:
225 case NID_camellia_256_cfb1
:
226 case NID_camellia_192_cfb1
:
227 case NID_camellia_128_cfb1
:
228 case NID_camellia_256_cfb8
:
229 case NID_camellia_192_cfb8
:
230 case NID_camellia_128_cfb8
:
231 case NID_camellia_256_ctr
:
232 case NID_camellia_192_ctr
:
233 case NID_camellia_128_ctr
:
234 case NID_des_ede3_cbc
:
235 case NID_des_ede3_ecb
:
236 case NID_des_ede3_ofb64
:
237 case NID_des_ede3_cfb64
:
238 case NID_des_ede3_cfb8
:
239 case NID_des_ede3_cfb1
:
240 case NID_des_ede_cbc
:
241 case NID_des_ede_ecb
:
242 case NID_des_ede_ofb64
:
243 case NID_des_ede_cfb64
:
251 case NID_id_smime_alg_CMS3DESwrap
:
262 case NID_cast5_cfb64
:
263 case NID_cast5_ofb64
:
266 case NID_seed_cfb128
:
267 case NID_seed_ofb128
:
285 case NID_chacha20_poly1305
:
286 case NID_rc4_hmac_md5
:
294 * Ensure a context left lying around from last time is cleared
297 if (cipher
!= NULL
&& ctx
->cipher
!= NULL
) {
298 OPENSSL_clear_free(ctx
->cipher_data
, ctx
->cipher
->ctx_size
);
299 ctx
->cipher_data
= NULL
;
303 /* TODO(3.0): Start of non-legacy code below */
305 /* Ensure a context left lying around from last time is cleared */
306 if (cipher
!= NULL
&& ctx
->cipher
!= NULL
) {
307 unsigned long flags
= ctx
->flags
;
309 EVP_CIPHER_CTX_reset(ctx
);
310 /* Restore encrypt and flags */
316 cipher
= ctx
->cipher
;
318 if (cipher
->prov
== NULL
) {
320 /* We only do explicit fetches inside the FIPS module */
321 EVPerr(EVP_F_EVP_CIPHERINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
324 EVP_CIPHER
*provciph
=
325 EVP_CIPHER_fetch(NULL
, OBJ_nid2sn(cipher
->nid
), "");
327 if (provciph
== NULL
) {
328 EVPerr(EVP_F_EVP_CIPHERINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
332 EVP_CIPHER_free(ctx
->fetched_cipher
);
333 ctx
->fetched_cipher
= provciph
;
337 ctx
->cipher
= cipher
;
338 if (ctx
->provctx
== NULL
) {
339 ctx
->provctx
= ctx
->cipher
->newctx(ossl_provider_ctx(cipher
->prov
));
340 if (ctx
->provctx
== NULL
) {
341 EVPerr(EVP_F_EVP_CIPHERINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
346 if ((ctx
->flags
& EVP_CIPH_NO_PADDING
) != 0) {
348 * If this ctx was already set up for no padding then we need to tell
349 * the new cipher about it.
351 if (!EVP_CIPHER_CTX_set_padding(ctx
, 0))
356 if (ctx
->cipher
->einit
== NULL
) {
357 EVPerr(EVP_F_EVP_CIPHERINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
361 return ctx
->cipher
->einit(ctx
->provctx
,
364 : EVP_CIPHER_CTX_key_length(ctx
),
367 : EVP_CIPHER_CTX_iv_length(ctx
));
370 if (ctx
->cipher
->dinit
== NULL
) {
371 EVPerr(EVP_F_EVP_CIPHERINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
375 return ctx
->cipher
->dinit(ctx
->provctx
,
378 : EVP_CIPHER_CTX_key_length(ctx
),
381 : EVP_CIPHER_CTX_iv_length(ctx
));
383 /* TODO(3.0): Remove legacy code below */
386 if (cipher
!= NULL
) {
388 * Ensure a context left lying around from last time is cleared (we
389 * previously attempted to avoid this if the same ENGINE and
390 * EVP_CIPHER could be used).
393 unsigned long flags
= ctx
->flags
;
394 EVP_CIPHER_CTX_reset(ctx
);
395 /* Restore encrypt and flags */
399 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
401 if (!ENGINE_init(impl
)) {
402 EVPerr(EVP_F_EVP_CIPHERINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
409 /* There's an ENGINE for this job ... (apparently) */
410 const EVP_CIPHER
*c
= ENGINE_get_cipher(impl
, cipher
->nid
);
414 * One positive side-effect of US's export control history,
415 * is that we should at least be able to avoid using US
416 * misspellings of "initialisation"?
418 EVPerr(EVP_F_EVP_CIPHERINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
421 /* We'll use the ENGINE's private cipher definition */
424 * Store the ENGINE functional reference so we know 'cipher' came
425 * from an ENGINE and we need to release it when done.
433 ctx
->cipher
= cipher
;
434 if (ctx
->cipher
->ctx_size
) {
435 ctx
->cipher_data
= OPENSSL_zalloc(ctx
->cipher
->ctx_size
);
436 if (ctx
->cipher_data
== NULL
) {
438 EVPerr(EVP_F_EVP_CIPHERINIT_EX
, ERR_R_MALLOC_FAILURE
);
442 ctx
->cipher_data
= NULL
;
444 ctx
->key_len
= cipher
->key_len
;
445 /* Preserve wrap enable flag, zero everything else */
446 ctx
->flags
&= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW
;
447 if (ctx
->cipher
->flags
& EVP_CIPH_CTRL_INIT
) {
448 if (!EVP_CIPHER_CTX_ctrl(ctx
, EVP_CTRL_INIT
, 0, NULL
)) {
450 EVPerr(EVP_F_EVP_CIPHERINIT_EX
, EVP_R_INITIALIZATION_ERROR
);
455 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
458 if (ctx
->cipher
== NULL
)
461 /* we assume block size is a power of 2 in *cryptUpdate */
462 OPENSSL_assert(ctx
->cipher
->block_size
== 1
463 || ctx
->cipher
->block_size
== 8
464 || ctx
->cipher
->block_size
== 16);
466 if (!(ctx
->flags
& EVP_CIPHER_CTX_FLAG_WRAP_ALLOW
)
467 && EVP_CIPHER_CTX_mode(ctx
) == EVP_CIPH_WRAP_MODE
) {
468 EVPerr(EVP_F_EVP_CIPHERINIT_EX
, EVP_R_WRAP_MODE_NOT_ALLOWED
);
472 if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx
)) & EVP_CIPH_CUSTOM_IV
)) {
473 switch (EVP_CIPHER_CTX_mode(ctx
)) {
475 case EVP_CIPH_STREAM_CIPHER
:
476 case EVP_CIPH_ECB_MODE
:
479 case EVP_CIPH_CFB_MODE
:
480 case EVP_CIPH_OFB_MODE
:
485 case EVP_CIPH_CBC_MODE
:
487 OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx
) <=
488 (int)sizeof(ctx
->iv
));
490 memcpy(ctx
->oiv
, iv
, EVP_CIPHER_CTX_iv_length(ctx
));
491 memcpy(ctx
->iv
, ctx
->oiv
, EVP_CIPHER_CTX_iv_length(ctx
));
494 case EVP_CIPH_CTR_MODE
:
496 /* Don't reuse IV for CTR mode */
498 memcpy(ctx
->iv
, iv
, EVP_CIPHER_CTX_iv_length(ctx
));
506 if (key
|| (ctx
->cipher
->flags
& EVP_CIPH_ALWAYS_CALL_INIT
)) {
507 if (!ctx
->cipher
->init(ctx
, key
, iv
, enc
))
512 ctx
->block_mask
= ctx
->cipher
->block_size
- 1;
516 int EVP_CipherUpdate(EVP_CIPHER_CTX
*ctx
, unsigned char *out
, int *outl
,
517 const unsigned char *in
, int inl
)
520 return EVP_EncryptUpdate(ctx
, out
, outl
, in
, inl
);
522 return EVP_DecryptUpdate(ctx
, out
, outl
, in
, inl
);
525 int EVP_CipherFinal_ex(EVP_CIPHER_CTX
*ctx
, unsigned char *out
, int *outl
)
528 return EVP_EncryptFinal_ex(ctx
, out
, outl
);
530 return EVP_DecryptFinal_ex(ctx
, out
, outl
);
533 int EVP_CipherFinal(EVP_CIPHER_CTX
*ctx
, unsigned char *out
, int *outl
)
536 return EVP_EncryptFinal(ctx
, out
, outl
);
538 return EVP_DecryptFinal(ctx
, out
, outl
);
541 int EVP_EncryptInit(EVP_CIPHER_CTX
*ctx
, const EVP_CIPHER
*cipher
,
542 const unsigned char *key
, const unsigned char *iv
)
544 return EVP_CipherInit(ctx
, cipher
, key
, iv
, 1);
547 int EVP_EncryptInit_ex(EVP_CIPHER_CTX
*ctx
, const EVP_CIPHER
*cipher
,
548 ENGINE
*impl
, const unsigned char *key
,
549 const unsigned char *iv
)
551 return EVP_CipherInit_ex(ctx
, cipher
, impl
, key
, iv
, 1);
554 int EVP_DecryptInit(EVP_CIPHER_CTX
*ctx
, const EVP_CIPHER
*cipher
,
555 const unsigned char *key
, const unsigned char *iv
)
557 return EVP_CipherInit(ctx
, cipher
, key
, iv
, 0);
560 int EVP_DecryptInit_ex(EVP_CIPHER_CTX
*ctx
, const EVP_CIPHER
*cipher
,
561 ENGINE
*impl
, const unsigned char *key
,
562 const unsigned char *iv
)
564 return EVP_CipherInit_ex(ctx
, cipher
, impl
, key
, iv
, 0);
568 * According to the letter of standard difference between pointers
569 * is specified to be valid only within same object. This makes
570 * it formally challenging to determine if input and output buffers
571 * are not partially overlapping with standard pointer arithmetic.
576 #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64
578 * Then we have VMS that distinguishes itself by adhering to
579 * sizeof(size_t)==4 even in 64-bit builds, which means that
580 * difference between two pointers might be truncated to 32 bits.
581 * In the context one can even wonder how comparison for
582 * equality is implemented. To be on the safe side we adhere to
583 * PTRDIFF_T even for comparison for equality.
585 # define PTRDIFF_T uint64_t
587 # define PTRDIFF_T size_t
590 int is_partially_overlapping(const void *ptr1
, const void *ptr2
, int len
)
592 PTRDIFF_T diff
= (PTRDIFF_T
)ptr1
-(PTRDIFF_T
)ptr2
;
594 * Check for partially overlapping buffers. [Binary logical
595 * operations are used instead of boolean to minimize number
596 * of conditional branches.]
598 int overlapped
= (len
> 0) & (diff
!= 0) & ((diff
< (PTRDIFF_T
)len
) |
599 (diff
> (0 - (PTRDIFF_T
)len
)));
604 static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX
*ctx
,
605 unsigned char *out
, int *outl
,
606 const unsigned char *in
, int inl
)
608 int i
, j
, bl
, cmpl
= inl
;
610 if (EVP_CIPHER_CTX_test_flags(ctx
, EVP_CIPH_FLAG_LENGTH_BITS
))
611 cmpl
= (cmpl
+ 7) / 8;
613 bl
= ctx
->cipher
->block_size
;
615 if (ctx
->cipher
->flags
& EVP_CIPH_FLAG_CUSTOM_CIPHER
) {
616 /* If block size > 1 then the cipher will have to do this check */
617 if (bl
== 1 && is_partially_overlapping(out
, in
, cmpl
)) {
618 EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE
, EVP_R_PARTIALLY_OVERLAPPING
);
622 i
= ctx
->cipher
->do_cipher(ctx
, out
, in
, inl
);
634 if (is_partially_overlapping(out
+ ctx
->buf_len
, in
, cmpl
)) {
635 EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE
, EVP_R_PARTIALLY_OVERLAPPING
);
639 if (ctx
->buf_len
== 0 && (inl
& (ctx
->block_mask
)) == 0) {
640 if (ctx
->cipher
->do_cipher(ctx
, out
, in
, inl
)) {
649 OPENSSL_assert(bl
<= (int)sizeof(ctx
->buf
));
652 memcpy(&(ctx
->buf
[i
]), in
, inl
);
658 memcpy(&(ctx
->buf
[i
]), in
, j
);
661 if (!ctx
->cipher
->do_cipher(ctx
, out
, ctx
->buf
, bl
))
671 if (!ctx
->cipher
->do_cipher(ctx
, out
, in
, inl
))
677 memcpy(ctx
->buf
, &(in
[inl
]), i
);
683 int EVP_EncryptUpdate(EVP_CIPHER_CTX
*ctx
, unsigned char *out
, int *outl
,
684 const unsigned char *in
, int inl
)
690 /* Prevent accidental use of decryption context when encrypting */
692 EVPerr(EVP_F_EVP_ENCRYPTUPDATE
, EVP_R_INVALID_OPERATION
);
696 if (ctx
->cipher
== NULL
) {
697 EVPerr(EVP_F_EVP_ENCRYPTUPDATE
, EVP_R_NO_CIPHER_SET
);
701 if (ctx
->cipher
->prov
== NULL
)
704 blocksize
= EVP_CIPHER_CTX_block_size(ctx
);
706 if (ctx
->cipher
->cupdate
== NULL
|| blocksize
< 1) {
707 EVPerr(EVP_F_EVP_ENCRYPTUPDATE
, EVP_R_UPDATE_ERROR
);
710 ret
= ctx
->cipher
->cupdate(ctx
->provctx
, out
, &soutl
,
711 inl
+ (blocksize
== 1 ? 0 : blocksize
), in
,
715 if (soutl
> INT_MAX
) {
716 EVPerr(EVP_F_EVP_ENCRYPTUPDATE
, EVP_R_UPDATE_ERROR
);
724 /* TODO(3.0): Remove legacy code below */
727 return evp_EncryptDecryptUpdate(ctx
, out
, outl
, in
, inl
);
730 int EVP_EncryptFinal(EVP_CIPHER_CTX
*ctx
, unsigned char *out
, int *outl
)
733 ret
= EVP_EncryptFinal_ex(ctx
, out
, outl
);
737 int EVP_EncryptFinal_ex(EVP_CIPHER_CTX
*ctx
, unsigned char *out
, int *outl
)
740 unsigned int i
, b
, bl
;
744 /* Prevent accidental use of decryption context when encrypting */
746 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX
, EVP_R_INVALID_OPERATION
);
750 if (ctx
->cipher
== NULL
) {
751 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX
, EVP_R_NO_CIPHER_SET
);
754 if (ctx
->cipher
->prov
== NULL
)
757 blocksize
= EVP_CIPHER_CTX_block_size(ctx
);
759 if (blocksize
< 1 || ctx
->cipher
->cfinal
== NULL
) {
760 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX
, EVP_R_FINAL_ERROR
);
764 ret
= ctx
->cipher
->cfinal(ctx
->provctx
, out
, &soutl
,
765 blocksize
== 1 ? 0 : blocksize
);
768 if (soutl
> INT_MAX
) {
769 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX
, EVP_R_FINAL_ERROR
);
777 /* TODO(3.0): Remove legacy code below */
780 if (ctx
->cipher
->flags
& EVP_CIPH_FLAG_CUSTOM_CIPHER
) {
781 ret
= ctx
->cipher
->do_cipher(ctx
, out
, NULL
, 0);
789 b
= ctx
->cipher
->block_size
;
790 OPENSSL_assert(b
<= sizeof(ctx
->buf
));
796 if (ctx
->flags
& EVP_CIPH_NO_PADDING
) {
798 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX
,
799 EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH
);
807 for (i
= bl
; i
< b
; i
++)
809 ret
= ctx
->cipher
->do_cipher(ctx
, out
, ctx
->buf
, b
);
817 int EVP_DecryptUpdate(EVP_CIPHER_CTX
*ctx
, unsigned char *out
, int *outl
,
818 const unsigned char *in
, int inl
)
820 int fix_len
, cmpl
= inl
, ret
;
825 /* Prevent accidental use of encryption context when decrypting */
827 EVPerr(EVP_F_EVP_DECRYPTUPDATE
, EVP_R_INVALID_OPERATION
);
831 if (ctx
->cipher
== NULL
) {
832 EVPerr(EVP_F_EVP_DECRYPTUPDATE
, EVP_R_NO_CIPHER_SET
);
835 if (ctx
->cipher
->prov
== NULL
)
838 blocksize
= EVP_CIPHER_CTX_block_size(ctx
);
840 if (ctx
->cipher
->cupdate
== NULL
|| blocksize
< 1) {
841 EVPerr(EVP_F_EVP_DECRYPTUPDATE
, EVP_R_UPDATE_ERROR
);
844 ret
= ctx
->cipher
->cupdate(ctx
->provctx
, out
, &soutl
,
845 inl
+ (blocksize
== 1 ? 0 : blocksize
), in
,
849 if (soutl
> INT_MAX
) {
850 EVPerr(EVP_F_EVP_DECRYPTUPDATE
, EVP_R_UPDATE_ERROR
);
858 /* TODO(3.0): Remove legacy code below */
861 b
= ctx
->cipher
->block_size
;
863 if (EVP_CIPHER_CTX_test_flags(ctx
, EVP_CIPH_FLAG_LENGTH_BITS
))
864 cmpl
= (cmpl
+ 7) / 8;
866 if (ctx
->cipher
->flags
& EVP_CIPH_FLAG_CUSTOM_CIPHER
) {
867 if (b
== 1 && is_partially_overlapping(out
, in
, cmpl
)) {
868 EVPerr(EVP_F_EVP_DECRYPTUPDATE
, EVP_R_PARTIALLY_OVERLAPPING
);
872 fix_len
= ctx
->cipher
->do_cipher(ctx
, out
, in
, inl
);
886 if (ctx
->flags
& EVP_CIPH_NO_PADDING
)
887 return evp_EncryptDecryptUpdate(ctx
, out
, outl
, in
, inl
);
889 OPENSSL_assert(b
<= sizeof(ctx
->final
));
891 if (ctx
->final_used
) {
892 /* see comment about PTRDIFF_T comparison above */
893 if (((PTRDIFF_T
)out
== (PTRDIFF_T
)in
)
894 || is_partially_overlapping(out
, in
, b
)) {
895 EVPerr(EVP_F_EVP_DECRYPTUPDATE
, EVP_R_PARTIALLY_OVERLAPPING
);
898 memcpy(out
, ctx
->final
, b
);
904 if (!evp_EncryptDecryptUpdate(ctx
, out
, outl
, in
, inl
))
908 * if we have 'decrypted' a multiple of block size, make sure we have a
909 * copy of this last block
911 if (b
> 1 && !ctx
->buf_len
) {
914 memcpy(ctx
->final
, &out
[*outl
], b
);
924 int EVP_DecryptFinal(EVP_CIPHER_CTX
*ctx
, unsigned char *out
, int *outl
)
927 ret
= EVP_DecryptFinal_ex(ctx
, out
, outl
);
931 int EVP_DecryptFinal_ex(EVP_CIPHER_CTX
*ctx
, unsigned char *out
, int *outl
)
939 /* Prevent accidental use of encryption context when decrypting */
941 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX
, EVP_R_INVALID_OPERATION
);
945 if (ctx
->cipher
== NULL
) {
946 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX
, EVP_R_NO_CIPHER_SET
);
950 if (ctx
->cipher
->prov
== NULL
)
953 blocksize
= EVP_CIPHER_CTX_block_size(ctx
);
955 if (blocksize
< 1 || ctx
->cipher
->cfinal
== NULL
) {
956 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX
, EVP_R_FINAL_ERROR
);
960 ret
= ctx
->cipher
->cfinal(ctx
->provctx
, out
, &soutl
,
961 blocksize
== 1 ? 0 : blocksize
);
964 if (soutl
> INT_MAX
) {
965 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX
, EVP_R_FINAL_ERROR
);
973 /* TODO(3.0): Remove legacy code below */
977 if (ctx
->cipher
->flags
& EVP_CIPH_FLAG_CUSTOM_CIPHER
) {
978 i
= ctx
->cipher
->do_cipher(ctx
, out
, NULL
, 0);
986 b
= ctx
->cipher
->block_size
;
987 if (ctx
->flags
& EVP_CIPH_NO_PADDING
) {
989 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX
,
990 EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH
);
997 if (ctx
->buf_len
|| !ctx
->final_used
) {
998 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX
, EVP_R_WRONG_FINAL_BLOCK_LENGTH
);
1001 OPENSSL_assert(b
<= sizeof(ctx
->final
));
1004 * The following assumes that the ciphertext has been authenticated.
1005 * Otherwise it provides a padding oracle.
1007 n
= ctx
->final
[b
- 1];
1008 if (n
== 0 || n
> (int)b
) {
1009 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX
, EVP_R_BAD_DECRYPT
);
1012 for (i
= 0; i
< n
; i
++) {
1013 if (ctx
->final
[--b
] != n
) {
1014 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX
, EVP_R_BAD_DECRYPT
);
1018 n
= ctx
->cipher
->block_size
- n
;
1019 for (i
= 0; i
< n
; i
++)
1020 out
[i
] = ctx
->final
[i
];
1027 int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX
*c
, int keylen
)
1029 if (c
->cipher
->prov
!= NULL
) {
1031 OSSL_PARAM params
[2] = { OSSL_PARAM_END
, OSSL_PARAM_END
};
1032 size_t len
= keylen
;
1034 if (EVP_CIPHER_CTX_key_length(c
) == keylen
)
1037 /* Check the cipher actually understands this parameter */
1038 if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c
->cipher
),
1039 OSSL_CIPHER_PARAM_KEYLEN
) == NULL
)
1042 params
[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN
, &len
);
1043 ok
= evp_do_ciph_ctx_setparams(c
->cipher
, c
->provctx
, params
);
1045 return ok
> 0 ? 1 : 0;
1048 /* TODO(3.0) legacy code follows */
1051 * Note there have never been any built-in ciphers that define this flag
1052 * since it was first introduced.
1054 if (c
->cipher
->flags
& EVP_CIPH_CUSTOM_KEY_LENGTH
)
1055 return EVP_CIPHER_CTX_ctrl(c
, EVP_CTRL_SET_KEY_LENGTH
, keylen
, NULL
);
1056 if (EVP_CIPHER_CTX_key_length(c
) == keylen
)
1058 if ((keylen
> 0) && (c
->cipher
->flags
& EVP_CIPH_VARIABLE_LENGTH
)) {
1059 c
->key_len
= keylen
;
1062 EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH
, EVP_R_INVALID_KEY_LENGTH
);
1066 int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX
*ctx
, int pad
)
1069 OSSL_PARAM params
[2] = { OSSL_PARAM_END
, OSSL_PARAM_END
};
1070 unsigned int pd
= pad
;
1073 ctx
->flags
&= ~EVP_CIPH_NO_PADDING
;
1075 ctx
->flags
|= EVP_CIPH_NO_PADDING
;
1077 params
[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING
, &pd
);
1078 ok
= evp_do_ciph_ctx_setparams(ctx
->cipher
, ctx
->provctx
, params
);
1083 int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX
*ctx
, int type
, int arg
, void *ptr
)
1085 int ret
= EVP_CTRL_RET_UNSUPPORTED
;
1089 OSSL_PARAM params
[2] = { OSSL_PARAM_END
, OSSL_PARAM_END
};
1091 if (ctx
== NULL
|| ctx
->cipher
== NULL
) {
1092 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL
, EVP_R_NO_CIPHER_SET
);
1096 if (ctx
->cipher
->prov
== NULL
)
1100 case EVP_CTRL_SET_KEY_LENGTH
:
1101 params
[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN
, &sz
);
1103 case EVP_CTRL_RAND_KEY
: /* Used by DES */
1106 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY
,
1112 * TODO(3.0) EVP_CTRL_INIT is purely legacy, no provider counterpart
1113 * As a matter of fact, this should be dead code, but some caller
1114 * might still do a direct control call with this command, so...
1115 * Legacy methods return 1 except for exceptional circumstances, so
1116 * we do the same here to not be disruptive.
1119 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS
: /* Used by DASYNC */
1122 case EVP_CTRL_GET_IV
:
1124 params
[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV
,
1127 case EVP_CTRL_AEAD_SET_IVLEN
:
1130 params
[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN
, &sz
);
1132 case EVP_CTRL_GCM_SET_IV_FIXED
:
1134 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED
,
1137 case EVP_CTRL_GET_RC5_ROUNDS
:
1138 set_params
= 0; /* Fall thru */
1139 case EVP_CTRL_SET_RC5_ROUNDS
:
1142 i
= (unsigned int)arg
;
1143 params
[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS
, &i
);
1145 case EVP_CTRL_SET_SPEED
:
1148 i
= (unsigned int)arg
;
1149 params
[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED
, &i
);
1151 case EVP_CTRL_AEAD_GET_TAG
:
1152 set_params
= 0; /* Fall thru */
1153 case EVP_CTRL_AEAD_SET_TAG
:
1154 params
[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG
,
1157 case EVP_CTRL_AEAD_SET_MAC_KEY
:
1159 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_MAC_KEY
,
1162 case EVP_CTRL_AEAD_TLS1_AAD
:
1163 /* This one does a set and a get - since it returns a padding size */
1165 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD
,
1167 ret
= evp_do_ciph_ctx_setparams(ctx
->cipher
, ctx
->provctx
, params
);
1171 OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD
, &sz
);
1172 ret
= evp_do_ciph_ctx_getparams(ctx
->cipher
, ctx
->provctx
, params
);
1176 #ifndef OPENSSL_NO_RC2
1177 case EVP_CTRL_GET_RC2_KEY_BITS
:
1178 set_params
= 0; /* Fall thru */
1179 case EVP_CTRL_SET_RC2_KEY_BITS
:
1180 params
[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS
, &sz
);
1182 #endif /* OPENSSL_NO_RC2 */
1186 ret
= evp_do_ciph_ctx_setparams(ctx
->cipher
, ctx
->provctx
, params
);
1188 ret
= evp_do_ciph_ctx_getparams(ctx
->cipher
, ctx
->provctx
, params
);
1191 /* TODO(3.0): Remove legacy code below */
1193 if (ctx
->cipher
->ctrl
== NULL
) {
1194 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL
, EVP_R_CTRL_NOT_IMPLEMENTED
);
1198 ret
= ctx
->cipher
->ctrl(ctx
, type
, arg
, ptr
);
1201 if (ret
== EVP_CTRL_RET_UNSUPPORTED
) {
1202 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL
,
1203 EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED
);
1209 int EVP_CIPHER_get_params(EVP_CIPHER
*cipher
, OSSL_PARAM params
[])
1211 if (cipher
!= NULL
&& cipher
->get_params
!= NULL
)
1212 return cipher
->get_params(params
);
1216 int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX
*ctx
, const OSSL_PARAM params
[])
1218 if (ctx
->cipher
!= NULL
&& ctx
->cipher
->set_ctx_params
!= NULL
)
1219 return ctx
->cipher
->set_ctx_params(ctx
->provctx
, params
);
1223 int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX
*ctx
, OSSL_PARAM params
[])
1225 if (ctx
->cipher
!= NULL
&& ctx
->cipher
->get_ctx_params
!= NULL
)
1226 return ctx
->cipher
->get_ctx_params(ctx
->provctx
, params
);
1230 const OSSL_PARAM
*EVP_CIPHER_gettable_params(const EVP_CIPHER
*cipher
)
1232 if (cipher
!= NULL
&& cipher
->gettable_params
!= NULL
)
1233 return cipher
->gettable_params();
1237 const OSSL_PARAM
*EVP_CIPHER_settable_ctx_params(const EVP_CIPHER
*cipher
)
1239 if (cipher
!= NULL
&& cipher
->settable_ctx_params
!= NULL
)
1240 return cipher
->settable_ctx_params();
1244 const OSSL_PARAM
*EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER
*cipher
)
1246 if (cipher
!= NULL
&& cipher
->gettable_ctx_params
!= NULL
)
1247 return cipher
->gettable_ctx_params();
1251 int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX
*ctx
, unsigned char *key
)
1253 if (ctx
->cipher
->flags
& EVP_CIPH_RAND_KEY
)
1254 return EVP_CIPHER_CTX_ctrl(ctx
, EVP_CTRL_RAND_KEY
, 0, key
);
1262 kl
= EVP_CIPHER_CTX_key_length(ctx
);
1263 if (kl
<= 0 || RAND_priv_bytes(key
, kl
) <= 0)
1267 #endif /* FIPS_MODE */
1270 int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX
*out
, const EVP_CIPHER_CTX
*in
)
1272 if ((in
== NULL
) || (in
->cipher
== NULL
)) {
1273 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY
, EVP_R_INPUT_NOT_INITIALIZED
);
1277 if (in
->cipher
->prov
== NULL
)
1280 if (in
->cipher
->dupctx
== NULL
) {
1281 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY
, EVP_R_NOT_ABLE_TO_COPY_CTX
);
1285 EVP_CIPHER_CTX_reset(out
);
1288 out
->provctx
= NULL
;
1290 if (in
->fetched_cipher
!= NULL
&& !EVP_CIPHER_up_ref(in
->fetched_cipher
)) {
1291 out
->fetched_cipher
= NULL
;
1295 out
->provctx
= in
->cipher
->dupctx(in
->provctx
);
1296 if (out
->provctx
== NULL
) {
1297 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY
, EVP_R_NOT_ABLE_TO_COPY_CTX
);
1303 /* TODO(3.0): Remove legacy code below */
1306 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
1307 /* Make sure it's safe to copy a cipher context using an ENGINE */
1308 if (in
->engine
&& !ENGINE_init(in
->engine
)) {
1309 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY
, ERR_R_ENGINE_LIB
);
1314 EVP_CIPHER_CTX_reset(out
);
1315 memcpy(out
, in
, sizeof(*out
));
1317 if (in
->cipher_data
&& in
->cipher
->ctx_size
) {
1318 out
->cipher_data
= OPENSSL_malloc(in
->cipher
->ctx_size
);
1319 if (out
->cipher_data
== NULL
) {
1321 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY
, ERR_R_MALLOC_FAILURE
);
1324 memcpy(out
->cipher_data
, in
->cipher_data
, in
->cipher
->ctx_size
);
1327 if (in
->cipher
->flags
& EVP_CIPH_CUSTOM_COPY
)
1328 if (!in
->cipher
->ctrl((EVP_CIPHER_CTX
*)in
, EVP_CTRL_COPY
, 0, out
)) {
1330 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY
, EVP_R_INITIALIZATION_ERROR
);
1336 EVP_CIPHER
*evp_cipher_new(void)
1338 EVP_CIPHER
*cipher
= OPENSSL_zalloc(sizeof(EVP_CIPHER
));
1340 if (cipher
!= NULL
) {
1341 cipher
->lock
= CRYPTO_THREAD_lock_new();
1342 if (cipher
->lock
== NULL
) {
1343 OPENSSL_free(cipher
);
1352 * FIPS module note: since internal fetches will be entirely
1353 * provider based, we know that none of its code depends on legacy
1354 * NIDs or any functionality that use them.
1357 /* TODO(3.x) get rid of the need for legacy NIDs */
1358 static void set_legacy_nid(const char *name
, void *vlegacy_nid
)
1361 int *legacy_nid
= vlegacy_nid
;
1363 * We use lowest level function to get the associated method, because
1364 * higher level functions such as EVP_get_cipherbyname() have changed
1365 * to look at providers too.
1367 const void *legacy_method
= OBJ_NAME_get(name
, OBJ_NAME_TYPE_CIPHER_METH
);
1369 if (*legacy_nid
== -1) /* We found a clash already */
1371 if (legacy_method
== NULL
)
1373 nid
= EVP_CIPHER_nid(legacy_method
);
1374 if (*legacy_nid
!= NID_undef
&& *legacy_nid
!= nid
) {
1382 static void *evp_cipher_from_dispatch(const int name_id
,
1383 const OSSL_DISPATCH
*fns
,
1384 OSSL_PROVIDER
*prov
)
1386 EVP_CIPHER
*cipher
= NULL
;
1387 int fnciphcnt
= 0, fnctxcnt
= 0;
1389 if ((cipher
= evp_cipher_new()) == NULL
) {
1390 EVPerr(0, ERR_R_MALLOC_FAILURE
);
1395 /* TODO(3.x) get rid of the need for legacy NIDs */
1396 cipher
->nid
= NID_undef
;
1397 evp_names_do_all(prov
, name_id
, set_legacy_nid
, &cipher
->nid
);
1398 if (cipher
->nid
== -1) {
1399 ERR_raise(ERR_LIB_EVP
, ERR_R_INTERNAL_ERROR
);
1400 EVP_CIPHER_free(cipher
);
1405 cipher
->name_id
= name_id
;
1407 for (; fns
->function_id
!= 0; fns
++) {
1408 switch (fns
->function_id
) {
1409 case OSSL_FUNC_CIPHER_NEWCTX
:
1410 if (cipher
->newctx
!= NULL
)
1412 cipher
->newctx
= OSSL_get_OP_cipher_newctx(fns
);
1415 case OSSL_FUNC_CIPHER_ENCRYPT_INIT
:
1416 if (cipher
->einit
!= NULL
)
1418 cipher
->einit
= OSSL_get_OP_cipher_encrypt_init(fns
);
1421 case OSSL_FUNC_CIPHER_DECRYPT_INIT
:
1422 if (cipher
->dinit
!= NULL
)
1424 cipher
->dinit
= OSSL_get_OP_cipher_decrypt_init(fns
);
1427 case OSSL_FUNC_CIPHER_UPDATE
:
1428 if (cipher
->cupdate
!= NULL
)
1430 cipher
->cupdate
= OSSL_get_OP_cipher_update(fns
);
1433 case OSSL_FUNC_CIPHER_FINAL
:
1434 if (cipher
->cfinal
!= NULL
)
1436 cipher
->cfinal
= OSSL_get_OP_cipher_final(fns
);
1439 case OSSL_FUNC_CIPHER_CIPHER
:
1440 if (cipher
->ccipher
!= NULL
)
1442 cipher
->ccipher
= OSSL_get_OP_cipher_cipher(fns
);
1444 case OSSL_FUNC_CIPHER_FREECTX
:
1445 if (cipher
->freectx
!= NULL
)
1447 cipher
->freectx
= OSSL_get_OP_cipher_freectx(fns
);
1450 case OSSL_FUNC_CIPHER_DUPCTX
:
1451 if (cipher
->dupctx
!= NULL
)
1453 cipher
->dupctx
= OSSL_get_OP_cipher_dupctx(fns
);
1455 case OSSL_FUNC_CIPHER_GET_PARAMS
:
1456 if (cipher
->get_params
!= NULL
)
1458 cipher
->get_params
= OSSL_get_OP_cipher_get_params(fns
);
1460 case OSSL_FUNC_CIPHER_GET_CTX_PARAMS
:
1461 if (cipher
->get_ctx_params
!= NULL
)
1463 cipher
->get_ctx_params
= OSSL_get_OP_cipher_get_ctx_params(fns
);
1465 case OSSL_FUNC_CIPHER_SET_CTX_PARAMS
:
1466 if (cipher
->set_ctx_params
!= NULL
)
1468 cipher
->set_ctx_params
= OSSL_get_OP_cipher_set_ctx_params(fns
);
1470 case OSSL_FUNC_CIPHER_GETTABLE_PARAMS
:
1471 if (cipher
->gettable_params
!= NULL
)
1473 cipher
->gettable_params
= OSSL_get_OP_cipher_gettable_params(fns
);
1475 case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS
:
1476 if (cipher
->gettable_ctx_params
!= NULL
)
1478 cipher
->gettable_ctx_params
=
1479 OSSL_get_OP_cipher_gettable_ctx_params(fns
);
1481 case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS
:
1482 if (cipher
->settable_ctx_params
!= NULL
)
1484 cipher
->settable_ctx_params
=
1485 OSSL_get_OP_cipher_settable_ctx_params(fns
);
1489 if ((fnciphcnt
!= 0 && fnciphcnt
!= 3 && fnciphcnt
!= 4)
1490 || (fnciphcnt
== 0 && cipher
->ccipher
== NULL
)
1493 * In order to be a consistent set of functions we must have at least
1494 * a complete set of "encrypt" functions, or a complete set of "decrypt"
1495 * functions, or a single "cipher" function. In all cases we need both
1496 * the "newctx" and "freectx" functions.
1498 EVP_CIPHER_free(cipher
);
1499 EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH
, EVP_R_INVALID_PROVIDER_FUNCTIONS
);
1502 cipher
->prov
= prov
;
1504 ossl_provider_up_ref(prov
);
1509 static int evp_cipher_up_ref(void *cipher
)
1511 return EVP_CIPHER_up_ref(cipher
);
1514 static void evp_cipher_free(void *cipher
)
1516 EVP_CIPHER_free(cipher
);
1519 EVP_CIPHER
*EVP_CIPHER_fetch(OPENSSL_CTX
*ctx
, const char *algorithm
,
1520 const char *properties
)
1522 EVP_CIPHER
*cipher
=
1523 evp_generic_fetch(ctx
, OSSL_OP_CIPHER
, algorithm
, properties
,
1524 evp_cipher_from_dispatch
, evp_cipher_up_ref
,
1527 if (cipher
!= NULL
&& !evp_cipher_cache_constants(cipher
)) {
1528 EVP_CIPHER_free(cipher
);
1534 int EVP_CIPHER_up_ref(EVP_CIPHER
*cipher
)
1538 CRYPTO_UP_REF(&cipher
->refcnt
, &ref
, cipher
->lock
);
1542 void EVP_CIPHER_free(EVP_CIPHER
*cipher
)
1549 CRYPTO_DOWN_REF(&cipher
->refcnt
, &i
, cipher
->lock
);
1552 ossl_provider_free(cipher
->prov
);
1553 CRYPTO_THREAD_lock_free(cipher
->lock
);
1554 OPENSSL_free(cipher
);
1557 void EVP_CIPHER_do_all_provided(OPENSSL_CTX
*libctx
,
1558 void (*fn
)(EVP_CIPHER
*mac
, void *arg
),
1561 evp_generic_do_all(libctx
, OSSL_OP_CIPHER
,
1562 (void (*)(void *, void *))fn
, arg
,
1563 evp_cipher_from_dispatch
, evp_cipher_free
);