2 * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* We need to use some engine deprecated APIs */
11 #define OPENSSL_SUPPRESS_DEPRECATED
16 #include <openssl/evp.h>
17 #include <openssl/err.h>
18 #include <openssl/rand.h>
20 # include <openssl/engine.h>
22 #include <openssl/params.h>
23 #include <openssl/core_names.h>
24 #include "internal/cryptlib.h"
25 #include "internal/provider.h"
26 #include "internal/core.h"
27 #include "internal/safe_math.h"
28 #include "crypto/evp.h"
29 #include "evp_local.h"
31 OSSL_SAFE_MATH_SIGNED(int, int)
33 int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *ctx)
38 if (ctx->cipher == NULL || ctx->cipher->prov == NULL)
41 if (ctx->algctx != NULL) {
42 if (ctx->cipher->freectx != NULL)
43 ctx->cipher->freectx(ctx->algctx);
46 if (ctx->fetched_cipher != NULL)
47 EVP_CIPHER_free(ctx->fetched_cipher);
48 memset(ctx, 0, sizeof(*ctx));
53 /* Remove legacy code below when legacy support is removed. */
56 if (ctx->cipher != NULL) {
57 if (ctx->cipher->cleanup && !ctx->cipher->cleanup(ctx))
59 /* Cleanse cipher context data */
60 if (ctx->cipher_data && ctx->cipher->ctx_size)
61 OPENSSL_cleanse(ctx->cipher_data, ctx->cipher->ctx_size);
63 OPENSSL_free(ctx->cipher_data);
64 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
65 ENGINE_finish(ctx->engine);
67 memset(ctx, 0, sizeof(*ctx));
72 EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void)
76 ctx = OPENSSL_zalloc(sizeof(EVP_CIPHER_CTX));
84 void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx)
88 EVP_CIPHER_CTX_reset(ctx);
92 static int evp_cipher_init_internal(EVP_CIPHER_CTX *ctx,
93 const EVP_CIPHER *cipher,
94 ENGINE *impl, const unsigned char *key,
95 const unsigned char *iv, int enc,
96 const OSSL_PARAM params[])
99 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
100 ENGINE *tmpimpl = NULL;
104 * enc == 1 means we are encrypting.
105 * enc == 0 means we are decrypting.
106 * enc == -1 means, use the previously initialised value for encrypt/decrypt
116 if (cipher == NULL && ctx->cipher == NULL) {
117 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
121 /* Code below to be removed when legacy support is dropped. */
123 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
125 * Whether it's nice or not, "Inits" can be used on "Final"'d contexts so
126 * this context may already have an ENGINE! Try to avoid releasing the
127 * previous handle, re-querying for an ENGINE, and having a
128 * reinitialisation, when it may all be unnecessary.
130 if (ctx->engine && ctx->cipher
131 && (cipher == NULL || cipher->nid == ctx->cipher->nid))
134 if (cipher != NULL && impl == NULL) {
135 /* Ask if an ENGINE is reserved for this job */
136 tmpimpl = ENGINE_get_cipher_engine(cipher->nid);
141 * If there are engines involved then we should use legacy handling for now.
143 if (ctx->engine != NULL
144 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
148 || (cipher != NULL && cipher->origin == EVP_ORIG_METH)
149 || (cipher == NULL && ctx->cipher != NULL
150 && ctx->cipher->origin == EVP_ORIG_METH)) {
151 if (ctx->cipher == ctx->fetched_cipher)
153 EVP_CIPHER_free(ctx->fetched_cipher);
154 ctx->fetched_cipher = NULL;
158 * Ensure a context left lying around from last time is cleared
161 if (cipher != NULL && ctx->cipher != NULL) {
162 OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size);
163 ctx->cipher_data = NULL;
166 /* Start of non-legacy code below */
168 /* Ensure a context left lying around from last time is cleared */
169 if (cipher != NULL && ctx->cipher != NULL) {
170 unsigned long flags = ctx->flags;
172 EVP_CIPHER_CTX_reset(ctx);
173 /* Restore encrypt and flags */
179 cipher = ctx->cipher;
181 if (cipher->prov == NULL) {
183 /* We only do explicit fetches inside the FIPS module */
184 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
187 EVP_CIPHER *provciph =
188 EVP_CIPHER_fetch(NULL,
189 cipher->nid == NID_undef ? "NULL"
190 : OBJ_nid2sn(cipher->nid),
193 if (provciph == NULL)
196 EVP_CIPHER_free(ctx->fetched_cipher);
197 ctx->fetched_cipher = provciph;
201 if (cipher->prov != NULL) {
202 if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) {
203 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
206 EVP_CIPHER_free(ctx->fetched_cipher);
207 /* Coverity false positive, the reference counting is confusing it */
208 /* coverity[use_after_free] */
209 ctx->fetched_cipher = (EVP_CIPHER *)cipher;
211 ctx->cipher = cipher;
212 if (ctx->algctx == NULL) {
213 ctx->algctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov));
214 if (ctx->algctx == NULL) {
215 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
220 if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) {
222 * If this ctx was already set up for no padding then we need to tell
223 * the new cipher about it.
225 if (!EVP_CIPHER_CTX_set_padding(ctx, 0))
230 if (ctx->cipher->einit == NULL) {
231 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
235 return ctx->cipher->einit(ctx->algctx,
238 : EVP_CIPHER_CTX_get_key_length(ctx),
241 : EVP_CIPHER_CTX_get_iv_length(ctx),
245 if (ctx->cipher->dinit == NULL) {
246 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
250 return ctx->cipher->dinit(ctx->algctx,
253 : EVP_CIPHER_CTX_get_key_length(ctx),
256 : EVP_CIPHER_CTX_get_iv_length(ctx),
259 /* Code below to be removed when legacy support is dropped. */
262 if (cipher != NULL) {
264 * Ensure a context left lying around from last time is cleared (we
265 * previously attempted to avoid this if the same ENGINE and
266 * EVP_CIPHER could be used).
269 unsigned long flags = ctx->flags;
270 EVP_CIPHER_CTX_reset(ctx);
271 /* Restore encrypt and flags */
275 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
277 if (!ENGINE_init(impl)) {
278 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
285 /* There's an ENGINE for this job ... (apparently) */
286 const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
290 * One positive side-effect of US's export control history,
291 * is that we should at least be able to avoid using US
292 * misspellings of "initialisation"?
294 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
297 /* We'll use the ENGINE's private cipher definition */
300 * Store the ENGINE functional reference so we know 'cipher' came
301 * from an ENGINE and we need to release it when done.
309 ctx->cipher = cipher;
310 if (ctx->cipher->ctx_size) {
311 ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
312 if (ctx->cipher_data == NULL) {
314 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
318 ctx->cipher_data = NULL;
320 ctx->key_len = cipher->key_len;
321 /* Preserve wrap enable flag, zero everything else */
322 ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
323 if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
324 if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL) <= 0) {
326 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
331 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
334 if (ctx->cipher == NULL)
337 /* we assume block size is a power of 2 in *cryptUpdate */
338 OPENSSL_assert(ctx->cipher->block_size == 1
339 || ctx->cipher->block_size == 8
340 || ctx->cipher->block_size == 16);
342 if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
343 && EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_WRAP_MODE) {
344 ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED);
348 if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx))
349 & EVP_CIPH_CUSTOM_IV) == 0) {
350 switch (EVP_CIPHER_CTX_get_mode(ctx)) {
352 case EVP_CIPH_STREAM_CIPHER:
353 case EVP_CIPH_ECB_MODE:
356 case EVP_CIPH_CFB_MODE:
357 case EVP_CIPH_OFB_MODE:
362 case EVP_CIPH_CBC_MODE:
363 n = EVP_CIPHER_CTX_get_iv_length(ctx);
364 if (n < 0 || n > (int)sizeof(ctx->iv)) {
365 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
369 memcpy(ctx->oiv, iv, n);
370 memcpy(ctx->iv, ctx->oiv, n);
373 case EVP_CIPH_CTR_MODE:
375 /* Don't reuse IV for CTR mode */
377 n = EVP_CIPHER_CTX_get_iv_length(ctx);
378 if (n <= 0 || n > (int)sizeof(ctx->iv)) {
379 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
382 memcpy(ctx->iv, iv, n);
391 if (key != NULL || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
392 if (!ctx->cipher->init(ctx, key, iv, enc))
397 ctx->block_mask = ctx->cipher->block_size - 1;
401 int EVP_CipherInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
402 const unsigned char *key, const unsigned char *iv,
403 int enc, const OSSL_PARAM params[])
405 return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, params);
408 int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
409 const unsigned char *key, const unsigned char *iv, int enc)
412 EVP_CIPHER_CTX_reset(ctx);
413 return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, NULL);
416 int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
417 ENGINE *impl, const unsigned char *key,
418 const unsigned char *iv, int enc)
420 return evp_cipher_init_internal(ctx, cipher, impl, key, iv, enc, NULL);
423 int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
424 const unsigned char *in, int inl)
427 return EVP_EncryptUpdate(ctx, out, outl, in, inl);
429 return EVP_DecryptUpdate(ctx, out, outl, in, inl);
432 int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
435 return EVP_EncryptFinal_ex(ctx, out, outl);
437 return EVP_DecryptFinal_ex(ctx, out, outl);
440 int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
443 return EVP_EncryptFinal(ctx, out, outl);
445 return EVP_DecryptFinal(ctx, out, outl);
448 int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
449 const unsigned char *key, const unsigned char *iv)
451 return EVP_CipherInit(ctx, cipher, key, iv, 1);
454 int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
455 ENGINE *impl, const unsigned char *key,
456 const unsigned char *iv)
458 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
461 int EVP_EncryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
462 const unsigned char *key, const unsigned char *iv,
463 const OSSL_PARAM params[])
465 return EVP_CipherInit_ex2(ctx, cipher, key, iv, 1, params);
468 int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
469 const unsigned char *key, const unsigned char *iv)
471 return EVP_CipherInit(ctx, cipher, key, iv, 0);
474 int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
475 ENGINE *impl, const unsigned char *key,
476 const unsigned char *iv)
478 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
481 int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
482 const unsigned char *key, const unsigned char *iv,
483 const OSSL_PARAM params[])
485 return EVP_CipherInit_ex2(ctx, cipher, key, iv, 0, params);
489 * According to the letter of standard difference between pointers
490 * is specified to be valid only within same object. This makes
491 * it formally challenging to determine if input and output buffers
492 * are not partially overlapping with standard pointer arithmetic.
497 #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64
499 * Then we have VMS that distinguishes itself by adhering to
500 * sizeof(size_t)==4 even in 64-bit builds, which means that
501 * difference between two pointers might be truncated to 32 bits.
502 * In the context one can even wonder how comparison for
503 * equality is implemented. To be on the safe side we adhere to
504 * PTRDIFF_T even for comparison for equality.
506 # define PTRDIFF_T uint64_t
508 # define PTRDIFF_T size_t
511 int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
513 PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2;
515 * Check for partially overlapping buffers. [Binary logical
516 * operations are used instead of boolean to minimize number
517 * of conditional branches.]
519 int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) |
520 (diff > (0 - (PTRDIFF_T)len)));
525 static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
526 unsigned char *out, int *outl,
527 const unsigned char *in, int inl)
529 int i, j, bl, cmpl = inl;
531 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
532 cmpl = safe_div_round_up_int(cmpl, 8, NULL);
534 bl = ctx->cipher->block_size;
536 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
537 /* If block size > 1 then the cipher will have to do this check */
538 if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
539 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
543 i = ctx->cipher->do_cipher(ctx, out, in, inl);
555 if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
556 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
560 if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) {
561 if (ctx->cipher->do_cipher(ctx, out, in, inl)) {
570 OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
573 memcpy(&(ctx->buf[i]), in, inl);
581 * Once we've processed the first j bytes from in, the amount of
582 * data left that is a multiple of the block length is:
583 * (inl - j) & ~(bl - 1)
584 * We must ensure that this amount of data, plus the one block that
585 * we process from ctx->buf does not exceed INT_MAX
587 if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) {
588 ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
591 memcpy(&(ctx->buf[i]), in, j);
594 if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
604 if (!ctx->cipher->do_cipher(ctx, out, in, inl))
610 memcpy(ctx->buf, &(in[inl]), i);
616 int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
617 const unsigned char *in, int inl)
620 size_t soutl, inl_ = (size_t)inl;
626 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
630 /* Prevent accidental use of decryption context when encrypting */
632 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
636 if (ctx->cipher == NULL) {
637 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
641 if (ctx->cipher->prov == NULL)
644 blocksize = ctx->cipher->block_size;
646 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
647 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
651 ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
652 inl_ + (size_t)(blocksize == 1 ? 0 : blocksize),
656 if (soutl > INT_MAX) {
657 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
665 /* Code below to be removed when legacy support is dropped. */
668 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
671 int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
674 ret = EVP_EncryptFinal_ex(ctx, out, outl);
678 int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
681 unsigned int i, b, bl;
688 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
692 /* Prevent accidental use of decryption context when encrypting */
694 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
698 if (ctx->cipher == NULL) {
699 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
702 if (ctx->cipher->prov == NULL)
705 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
707 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
708 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
712 ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
713 blocksize == 1 ? 0 : blocksize);
716 if (soutl > INT_MAX) {
717 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
725 /* Code below to be removed when legacy support is dropped. */
728 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
729 ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
737 b = ctx->cipher->block_size;
738 OPENSSL_assert(b <= sizeof(ctx->buf));
744 if (ctx->flags & EVP_CIPH_NO_PADDING) {
746 ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
754 for (i = bl; i < b; i++)
756 ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b);
764 int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
765 const unsigned char *in, int inl)
767 int fix_len, cmpl = inl, ret;
769 size_t soutl, inl_ = (size_t)inl;
775 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
779 /* Prevent accidental use of encryption context when decrypting */
781 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
785 if (ctx->cipher == NULL) {
786 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
789 if (ctx->cipher->prov == NULL)
792 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
794 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
795 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
798 ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
799 inl_ + (size_t)(blocksize == 1 ? 0 : blocksize),
803 if (soutl > INT_MAX) {
804 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
812 /* Code below to be removed when legacy support is dropped. */
815 b = ctx->cipher->block_size;
817 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
818 cmpl = safe_div_round_up_int(cmpl, 8, NULL);
820 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
821 if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
822 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
826 fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
840 if (ctx->flags & EVP_CIPH_NO_PADDING)
841 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
843 OPENSSL_assert(b <= sizeof(ctx->final));
845 if (ctx->final_used) {
846 /* see comment about PTRDIFF_T comparison above */
847 if (((PTRDIFF_T)out == (PTRDIFF_T)in)
848 || ossl_is_partially_overlapping(out, in, b)) {
849 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
853 * final_used is only ever set if buf_len is 0. Therefore the maximum
854 * length output we will ever see from evp_EncryptDecryptUpdate is
855 * the maximum multiple of the block length that is <= inl, or just:
857 * Since final_used has been set then the final output length is:
858 * (inl & ~(b - 1)) + b
859 * This must never exceed INT_MAX
861 if ((inl & ~(b - 1)) > INT_MAX - b) {
862 ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
865 memcpy(out, ctx->final, b);
871 if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl))
875 * if we have 'decrypted' a multiple of block size, make sure we have a
876 * copy of this last block
878 if (b > 1 && !ctx->buf_len) {
881 memcpy(ctx->final, &out[*outl], b);
891 int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
894 ret = EVP_DecryptFinal_ex(ctx, out, outl);
898 int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
909 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
913 /* Prevent accidental use of encryption context when decrypting */
915 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
919 if (ctx->cipher == NULL) {
920 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
924 if (ctx->cipher->prov == NULL)
927 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
929 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
930 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
934 ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
935 blocksize == 1 ? 0 : blocksize);
938 if (soutl > INT_MAX) {
939 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
947 /* Code below to be removed when legacy support is dropped. */
951 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
952 i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
960 b = ctx->cipher->block_size;
961 if (ctx->flags & EVP_CIPH_NO_PADDING) {
963 ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
970 if (ctx->buf_len || !ctx->final_used) {
971 ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
974 OPENSSL_assert(b <= sizeof(ctx->final));
977 * The following assumes that the ciphertext has been authenticated.
978 * Otherwise it provides a padding oracle.
980 n = ctx->final[b - 1];
981 if (n == 0 || n > (int)b) {
982 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
985 for (i = 0; i < n; i++) {
986 if (ctx->final[--b] != n) {
987 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
991 n = ctx->cipher->block_size - n;
992 for (i = 0; i < n; i++)
993 out[i] = ctx->final[i];
1000 int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
1002 if (c->cipher->prov != NULL) {
1004 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1007 if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
1010 /* Check the cipher actually understands this parameter */
1011 if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher),
1012 OSSL_CIPHER_PARAM_KEYLEN) == NULL) {
1013 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
1017 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
1018 if (!OSSL_PARAM_set_int(params, keylen))
1020 ok = evp_do_ciph_ctx_setparams(c->cipher, c->algctx, params);
1023 c->key_len = keylen;
1027 /* Code below to be removed when legacy support is dropped. */
1030 * Note there have never been any built-in ciphers that define this flag
1031 * since it was first introduced.
1033 if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
1034 return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
1035 if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
1037 if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
1038 c->key_len = keylen;
1041 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
1045 int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
1048 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1049 unsigned int pd = pad;
1052 ctx->flags &= ~EVP_CIPH_NO_PADDING;
1054 ctx->flags |= EVP_CIPH_NO_PADDING;
1056 if (ctx->cipher != NULL && ctx->cipher->prov == NULL)
1058 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd);
1059 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1064 int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1066 int ret = EVP_CTRL_RET_UNSUPPORTED;
1070 OSSL_PARAM params[4] = {
1071 OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
1074 if (ctx == NULL || ctx->cipher == NULL) {
1075 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
1079 if (ctx->cipher->prov == NULL)
1083 case EVP_CTRL_SET_KEY_LENGTH:
1084 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz);
1087 case EVP_CTRL_RAND_KEY: /* Used by DES */
1090 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY,
1096 * EVP_CTRL_INIT is purely legacy, no provider counterpart.
1097 * As a matter of fact, this should be dead code, but some caller
1098 * might still do a direct control call with this command, so...
1099 * Legacy methods return 1 except for exceptional circumstances, so
1100 * we do the same here to not be disruptive.
1103 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */
1106 case EVP_CTRL_AEAD_SET_IVLEN:
1109 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1112 case EVP_CTRL_CCM_SET_L:
1113 if (arg < 2 || arg > 8)
1116 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1119 case EVP_CTRL_AEAD_SET_IV_FIXED:
1120 params[0] = OSSL_PARAM_construct_octet_string(
1121 OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz);
1123 case EVP_CTRL_GCM_IV_GEN:
1126 sz = 0; /* special case that uses the iv length */
1127 params[0] = OSSL_PARAM_construct_octet_string(
1128 OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz);
1130 case EVP_CTRL_GCM_SET_IV_INV:
1133 params[0] = OSSL_PARAM_construct_octet_string(
1134 OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz);
1136 case EVP_CTRL_GET_RC5_ROUNDS:
1137 set_params = 0; /* Fall thru */
1138 case EVP_CTRL_SET_RC5_ROUNDS:
1141 i = (unsigned int)arg;
1142 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i);
1144 case EVP_CTRL_SET_SPEED:
1147 i = (unsigned int)arg;
1148 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i);
1150 case EVP_CTRL_AEAD_GET_TAG:
1151 set_params = 0; /* Fall thru */
1152 case EVP_CTRL_AEAD_SET_TAG:
1153 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
1156 case EVP_CTRL_AEAD_TLS1_AAD:
1157 /* This one does a set and a get - since it returns a size */
1159 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD,
1161 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1165 OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz);
1166 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1170 #ifndef OPENSSL_NO_RC2
1171 case EVP_CTRL_GET_RC2_KEY_BITS:
1172 set_params = 0; /* Fall thru */
1173 case EVP_CTRL_SET_RC2_KEY_BITS:
1174 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz);
1176 #endif /* OPENSSL_NO_RC2 */
1177 #if !defined(OPENSSL_NO_MULTIBLOCK)
1178 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
1179 params[0] = OSSL_PARAM_construct_size_t(
1180 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz);
1181 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1185 params[0] = OSSL_PARAM_construct_size_t(
1186 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz);
1187 params[1] = OSSL_PARAM_construct_end();
1188 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1192 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: {
1193 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1194 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1196 if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
1199 params[0] = OSSL_PARAM_construct_octet_string(
1200 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len);
1201 params[1] = OSSL_PARAM_construct_uint(
1202 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1203 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1206 /* Retrieve the return values changed by the set */
1207 params[0] = OSSL_PARAM_construct_size_t(
1208 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz);
1209 params[1] = OSSL_PARAM_construct_uint(
1210 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1211 params[2] = OSSL_PARAM_construct_end();
1212 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1217 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: {
1218 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1219 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1221 params[0] = OSSL_PARAM_construct_octet_string(
1222 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len);
1224 params[1] = OSSL_PARAM_construct_octet_string(
1225 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp,
1227 params[2] = OSSL_PARAM_construct_uint(
1228 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1229 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1232 params[0] = OSSL_PARAM_construct_size_t(
1233 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz);
1234 params[1] = OSSL_PARAM_construct_end();
1235 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1240 #endif /* OPENSSL_NO_MULTIBLOCK */
1241 case EVP_CTRL_AEAD_SET_MAC_KEY:
1244 params[0] = OSSL_PARAM_construct_octet_string(
1245 OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz);
1250 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1252 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1255 /* Code below to be removed when legacy support is dropped. */
1257 if (ctx->cipher->ctrl == NULL) {
1258 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
1262 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
1265 if (ret == EVP_CTRL_RET_UNSUPPORTED) {
1266 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
1272 int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[])
1274 if (cipher != NULL && cipher->get_params != NULL)
1275 return cipher->get_params(params);
1279 int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[])
1282 const OSSL_PARAM *p;
1284 if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) {
1285 r = ctx->cipher->set_ctx_params(ctx->algctx, params);
1287 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
1288 if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->key_len)) {
1294 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN);
1295 if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->iv_len)) {
1304 int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[])
1306 if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL)
1307 return ctx->cipher->get_ctx_params(ctx->algctx, params);
1311 const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher)
1313 if (cipher != NULL && cipher->gettable_params != NULL)
1314 return cipher->gettable_params(
1315 ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)));
1319 const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher)
1323 if (cipher != NULL && cipher->settable_ctx_params != NULL) {
1324 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
1325 return cipher->settable_ctx_params(NULL, provctx);
1330 const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher)
1334 if (cipher != NULL && cipher->gettable_ctx_params != NULL) {
1335 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
1336 return cipher->gettable_ctx_params(NULL, provctx);
1341 const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx)
1345 if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) {
1346 alg = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
1347 return cctx->cipher->settable_ctx_params(cctx->algctx, alg);
1352 const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx)
1356 if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) {
1357 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
1358 return cctx->cipher->gettable_ctx_params(cctx->algctx, provctx);
1364 static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx)
1366 const EVP_CIPHER *cipher = ctx->cipher;
1367 const OSSL_PROVIDER *prov;
1372 prov = EVP_CIPHER_get0_provider(cipher);
1373 return ossl_provider_libctx(prov);
1377 int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
1379 if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
1380 return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
1387 OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx);
1389 kl = EVP_CIPHER_CTX_get_key_length(ctx);
1390 if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl, 0) <= 0)
1394 #endif /* FIPS_MODULE */
1397 EVP_CIPHER_CTX *EVP_CIPHER_CTX_dup(const EVP_CIPHER_CTX *in)
1399 EVP_CIPHER_CTX *out = EVP_CIPHER_CTX_new();
1401 if (out != NULL && !EVP_CIPHER_CTX_copy(out, in)) {
1402 EVP_CIPHER_CTX_free(out);
1408 int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
1410 if ((in == NULL) || (in->cipher == NULL)) {
1411 ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED);
1415 if (in->cipher->prov == NULL)
1418 if (in->cipher->dupctx == NULL) {
1419 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
1423 EVP_CIPHER_CTX_reset(out);
1428 if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) {
1429 out->fetched_cipher = NULL;
1433 out->algctx = in->cipher->dupctx(in->algctx);
1434 if (out->algctx == NULL) {
1435 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
1441 /* Code below to be removed when legacy support is dropped. */
1444 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
1445 /* Make sure it's safe to copy a cipher context using an ENGINE */
1446 if (in->engine && !ENGINE_init(in->engine)) {
1447 ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB);
1452 EVP_CIPHER_CTX_reset(out);
1453 memcpy(out, in, sizeof(*out));
1455 if (in->cipher_data && in->cipher->ctx_size) {
1456 out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
1457 if (out->cipher_data == NULL) {
1459 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
1462 memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
1465 if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
1466 if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
1468 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
1474 EVP_CIPHER *evp_cipher_new(void)
1476 EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
1478 if (cipher != NULL) {
1479 cipher->lock = CRYPTO_THREAD_lock_new();
1480 if (cipher->lock == NULL) {
1481 OPENSSL_free(cipher);
1490 * FIPS module note: since internal fetches will be entirely
1491 * provider based, we know that none of its code depends on legacy
1492 * NIDs or any functionality that use them.
1495 /* After removal of legacy support get rid of the need for legacy NIDs */
1496 static void set_legacy_nid(const char *name, void *vlegacy_nid)
1499 int *legacy_nid = vlegacy_nid;
1501 * We use lowest level function to get the associated method, because
1502 * higher level functions such as EVP_get_cipherbyname() have changed
1503 * to look at providers too.
1505 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
1507 if (*legacy_nid == -1) /* We found a clash already */
1509 if (legacy_method == NULL)
1511 nid = EVP_CIPHER_get_nid(legacy_method);
1512 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
1520 static void *evp_cipher_from_algorithm(const int name_id,
1521 const OSSL_ALGORITHM *algodef,
1522 OSSL_PROVIDER *prov)
1524 const OSSL_DISPATCH *fns = algodef->implementation;
1525 EVP_CIPHER *cipher = NULL;
1526 int fnciphcnt = 0, fnctxcnt = 0;
1528 if ((cipher = evp_cipher_new()) == NULL) {
1529 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
1534 cipher->nid = NID_undef;
1535 if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid)
1536 || cipher->nid == -1) {
1537 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1538 EVP_CIPHER_free(cipher);
1543 cipher->name_id = name_id;
1544 if ((cipher->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
1545 EVP_CIPHER_free(cipher);
1548 cipher->description = algodef->algorithm_description;
1550 for (; fns->function_id != 0; fns++) {
1551 switch (fns->function_id) {
1552 case OSSL_FUNC_CIPHER_NEWCTX:
1553 if (cipher->newctx != NULL)
1555 cipher->newctx = OSSL_FUNC_cipher_newctx(fns);
1558 case OSSL_FUNC_CIPHER_ENCRYPT_INIT:
1559 if (cipher->einit != NULL)
1561 cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns);
1564 case OSSL_FUNC_CIPHER_DECRYPT_INIT:
1565 if (cipher->dinit != NULL)
1567 cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns);
1570 case OSSL_FUNC_CIPHER_UPDATE:
1571 if (cipher->cupdate != NULL)
1573 cipher->cupdate = OSSL_FUNC_cipher_update(fns);
1576 case OSSL_FUNC_CIPHER_FINAL:
1577 if (cipher->cfinal != NULL)
1579 cipher->cfinal = OSSL_FUNC_cipher_final(fns);
1582 case OSSL_FUNC_CIPHER_CIPHER:
1583 if (cipher->ccipher != NULL)
1585 cipher->ccipher = OSSL_FUNC_cipher_cipher(fns);
1587 case OSSL_FUNC_CIPHER_FREECTX:
1588 if (cipher->freectx != NULL)
1590 cipher->freectx = OSSL_FUNC_cipher_freectx(fns);
1593 case OSSL_FUNC_CIPHER_DUPCTX:
1594 if (cipher->dupctx != NULL)
1596 cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns);
1598 case OSSL_FUNC_CIPHER_GET_PARAMS:
1599 if (cipher->get_params != NULL)
1601 cipher->get_params = OSSL_FUNC_cipher_get_params(fns);
1603 case OSSL_FUNC_CIPHER_GET_CTX_PARAMS:
1604 if (cipher->get_ctx_params != NULL)
1606 cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns);
1608 case OSSL_FUNC_CIPHER_SET_CTX_PARAMS:
1609 if (cipher->set_ctx_params != NULL)
1611 cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns);
1613 case OSSL_FUNC_CIPHER_GETTABLE_PARAMS:
1614 if (cipher->gettable_params != NULL)
1616 cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns);
1618 case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS:
1619 if (cipher->gettable_ctx_params != NULL)
1621 cipher->gettable_ctx_params =
1622 OSSL_FUNC_cipher_gettable_ctx_params(fns);
1624 case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS:
1625 if (cipher->settable_ctx_params != NULL)
1627 cipher->settable_ctx_params =
1628 OSSL_FUNC_cipher_settable_ctx_params(fns);
1632 if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4)
1633 || (fnciphcnt == 0 && cipher->ccipher == NULL)
1636 * In order to be a consistent set of functions we must have at least
1637 * a complete set of "encrypt" functions, or a complete set of "decrypt"
1638 * functions, or a single "cipher" function. In all cases we need both
1639 * the "newctx" and "freectx" functions.
1641 EVP_CIPHER_free(cipher);
1642 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1645 cipher->prov = prov;
1647 ossl_provider_up_ref(prov);
1649 if (!evp_cipher_cache_constants(cipher)) {
1650 EVP_CIPHER_free(cipher);
1651 ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED);
1658 static int evp_cipher_up_ref(void *cipher)
1660 return EVP_CIPHER_up_ref(cipher);
1663 static void evp_cipher_free(void *cipher)
1665 EVP_CIPHER_free(cipher);
1668 EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
1669 const char *properties)
1671 EVP_CIPHER *cipher =
1672 evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties,
1673 evp_cipher_from_algorithm, evp_cipher_up_ref,
1679 int EVP_CIPHER_up_ref(EVP_CIPHER *cipher)
1683 if (cipher->origin == EVP_ORIG_DYNAMIC)
1684 CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock);
1688 void evp_cipher_free_int(EVP_CIPHER *cipher)
1690 OPENSSL_free(cipher->type_name);
1691 ossl_provider_free(cipher->prov);
1692 CRYPTO_THREAD_lock_free(cipher->lock);
1693 OPENSSL_free(cipher);
1696 void EVP_CIPHER_free(EVP_CIPHER *cipher)
1700 if (cipher == NULL || cipher->origin != EVP_ORIG_DYNAMIC)
1703 CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock);
1706 evp_cipher_free_int(cipher);
1709 void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx,
1710 void (*fn)(EVP_CIPHER *mac, void *arg),
1713 evp_generic_do_all(libctx, OSSL_OP_CIPHER,
1714 (void (*)(void *, void *))fn, arg,
1715 evp_cipher_from_algorithm, evp_cipher_up_ref,