2 * Copyright 1995-2023 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 if (ctx->cipher->cleanup != NULL && !ctx->cipher->cleanup(ctx))
164 OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size);
165 ctx->cipher_data = NULL;
168 /* Start of non-legacy code below */
170 /* Ensure a context left lying around from last time is cleared */
171 if (cipher != NULL && ctx->cipher != NULL) {
172 unsigned long flags = ctx->flags;
174 EVP_CIPHER_CTX_reset(ctx);
175 /* Restore encrypt and flags */
181 cipher = ctx->cipher;
183 if (cipher->prov == NULL) {
185 /* We only do explicit fetches inside the FIPS module */
186 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
189 EVP_CIPHER *provciph =
190 EVP_CIPHER_fetch(NULL,
191 cipher->nid == NID_undef ? "NULL"
192 : OBJ_nid2sn(cipher->nid),
195 if (provciph == NULL)
198 EVP_CIPHER_free(ctx->fetched_cipher);
199 ctx->fetched_cipher = provciph;
203 if (!ossl_assert(cipher->prov != NULL)) {
204 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
208 if (cipher != ctx->fetched_cipher) {
209 if (!EVP_CIPHER_up_ref((EVP_CIPHER *)cipher)) {
210 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
213 EVP_CIPHER_free(ctx->fetched_cipher);
214 /* Coverity false positive, the reference counting is confusing it */
215 /* coverity[use_after_free] */
216 ctx->fetched_cipher = (EVP_CIPHER *)cipher;
218 ctx->cipher = cipher;
219 if (ctx->algctx == NULL) {
220 ctx->algctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov));
221 if (ctx->algctx == NULL) {
222 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
227 if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) {
229 * If this ctx was already set up for no padding then we need to tell
230 * the new cipher about it.
232 if (!EVP_CIPHER_CTX_set_padding(ctx, 0))
237 if (ctx->cipher->einit == NULL) {
238 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
242 return ctx->cipher->einit(ctx->algctx,
245 : EVP_CIPHER_CTX_get_key_length(ctx),
248 : EVP_CIPHER_CTX_get_iv_length(ctx),
252 if (ctx->cipher->dinit == NULL) {
253 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
257 return ctx->cipher->dinit(ctx->algctx,
260 : EVP_CIPHER_CTX_get_key_length(ctx),
263 : EVP_CIPHER_CTX_get_iv_length(ctx),
266 /* Code below to be removed when legacy support is dropped. */
269 if (cipher != NULL) {
271 * Ensure a context left lying around from last time is cleared (we
272 * previously attempted to avoid this if the same ENGINE and
273 * EVP_CIPHER could be used).
276 unsigned long flags = ctx->flags;
277 EVP_CIPHER_CTX_reset(ctx);
278 /* Restore encrypt and flags */
282 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
284 if (!ENGINE_init(impl)) {
285 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
292 /* There's an ENGINE for this job ... (apparently) */
293 const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
297 * One positive side-effect of US's export control history,
298 * is that we should at least be able to avoid using US
299 * misspellings of "initialisation"?
301 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
304 /* We'll use the ENGINE's private cipher definition */
307 * Store the ENGINE functional reference so we know 'cipher' came
308 * from an ENGINE and we need to release it when done.
316 ctx->cipher = cipher;
317 if (ctx->cipher->ctx_size) {
318 ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
319 if (ctx->cipher_data == NULL) {
324 ctx->cipher_data = NULL;
326 ctx->key_len = cipher->key_len;
327 /* Preserve wrap enable flag, zero everything else */
328 ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
329 if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
330 if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL) <= 0) {
332 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
337 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
340 if (ctx->cipher == NULL)
343 /* we assume block size is a power of 2 in *cryptUpdate */
344 OPENSSL_assert(ctx->cipher->block_size == 1
345 || ctx->cipher->block_size == 8
346 || ctx->cipher->block_size == 16);
348 if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
349 && EVP_CIPHER_CTX_get_mode(ctx) == EVP_CIPH_WRAP_MODE) {
350 ERR_raise(ERR_LIB_EVP, EVP_R_WRAP_MODE_NOT_ALLOWED);
354 if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx))
355 & EVP_CIPH_CUSTOM_IV) == 0) {
356 switch (EVP_CIPHER_CTX_get_mode(ctx)) {
358 case EVP_CIPH_STREAM_CIPHER:
359 case EVP_CIPH_ECB_MODE:
362 case EVP_CIPH_CFB_MODE:
363 case EVP_CIPH_OFB_MODE:
368 case EVP_CIPH_CBC_MODE:
369 n = EVP_CIPHER_CTX_get_iv_length(ctx);
370 if (n < 0 || n > (int)sizeof(ctx->iv)) {
371 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
375 memcpy(ctx->oiv, iv, n);
376 memcpy(ctx->iv, ctx->oiv, n);
379 case EVP_CIPH_CTR_MODE:
381 /* Don't reuse IV for CTR mode */
383 n = EVP_CIPHER_CTX_get_iv_length(ctx);
384 if (n <= 0 || n > (int)sizeof(ctx->iv)) {
385 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
388 memcpy(ctx->iv, iv, n);
397 if (key != NULL || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
398 if (!ctx->cipher->init(ctx, key, iv, enc))
403 ctx->block_mask = ctx->cipher->block_size - 1;
407 int EVP_CipherInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
408 const unsigned char *key, const unsigned char *iv,
409 int enc, const OSSL_PARAM params[])
411 return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, params);
414 int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
415 const unsigned char *key, const unsigned char *iv, int enc)
418 EVP_CIPHER_CTX_reset(ctx);
419 return evp_cipher_init_internal(ctx, cipher, NULL, key, iv, enc, NULL);
422 int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
423 ENGINE *impl, const unsigned char *key,
424 const unsigned char *iv, int enc)
426 return evp_cipher_init_internal(ctx, cipher, impl, key, iv, enc, NULL);
429 int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
430 const unsigned char *in, int inl)
433 return EVP_EncryptUpdate(ctx, out, outl, in, inl);
435 return EVP_DecryptUpdate(ctx, out, outl, in, inl);
438 int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
441 return EVP_EncryptFinal_ex(ctx, out, outl);
443 return EVP_DecryptFinal_ex(ctx, out, outl);
446 int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
449 return EVP_EncryptFinal(ctx, out, outl);
451 return EVP_DecryptFinal(ctx, out, outl);
454 int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
455 const unsigned char *key, const unsigned char *iv)
457 return EVP_CipherInit(ctx, cipher, key, iv, 1);
460 int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
461 ENGINE *impl, const unsigned char *key,
462 const unsigned char *iv)
464 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
467 int EVP_EncryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
468 const unsigned char *key, const unsigned char *iv,
469 const OSSL_PARAM params[])
471 return EVP_CipherInit_ex2(ctx, cipher, key, iv, 1, params);
474 int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
475 const unsigned char *key, const unsigned char *iv)
477 return EVP_CipherInit(ctx, cipher, key, iv, 0);
480 int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
481 ENGINE *impl, const unsigned char *key,
482 const unsigned char *iv)
484 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
487 int EVP_DecryptInit_ex2(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
488 const unsigned char *key, const unsigned char *iv,
489 const OSSL_PARAM params[])
491 return EVP_CipherInit_ex2(ctx, cipher, key, iv, 0, params);
495 * According to the letter of standard difference between pointers
496 * is specified to be valid only within same object. This makes
497 * it formally challenging to determine if input and output buffers
498 * are not partially overlapping with standard pointer arithmetic.
503 #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64
505 * Then we have VMS that distinguishes itself by adhering to
506 * sizeof(size_t)==4 even in 64-bit builds, which means that
507 * difference between two pointers might be truncated to 32 bits.
508 * In the context one can even wonder how comparison for
509 * equality is implemented. To be on the safe side we adhere to
510 * PTRDIFF_T even for comparison for equality.
512 # define PTRDIFF_T uint64_t
514 # define PTRDIFF_T size_t
517 int ossl_is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
519 PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2;
521 * Check for partially overlapping buffers. [Binary logical
522 * operations are used instead of boolean to minimize number
523 * of conditional branches.]
525 int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) |
526 (diff > (0 - (PTRDIFF_T)len)));
531 static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
532 unsigned char *out, int *outl,
533 const unsigned char *in, int inl)
535 int i, j, bl, cmpl = inl;
537 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
538 cmpl = safe_div_round_up_int(cmpl, 8, NULL);
540 bl = ctx->cipher->block_size;
542 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
543 /* If block size > 1 then the cipher will have to do this check */
544 if (bl == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
545 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
549 i = ctx->cipher->do_cipher(ctx, out, in, inl);
561 if (ossl_is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
562 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
566 if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) {
567 if (ctx->cipher->do_cipher(ctx, out, in, inl)) {
576 OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
579 memcpy(&(ctx->buf[i]), in, inl);
587 * Once we've processed the first j bytes from in, the amount of
588 * data left that is a multiple of the block length is:
589 * (inl - j) & ~(bl - 1)
590 * We must ensure that this amount of data, plus the one block that
591 * we process from ctx->buf does not exceed INT_MAX
593 if (((inl - j) & ~(bl - 1)) > INT_MAX - bl) {
594 ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
597 memcpy(&(ctx->buf[i]), in, j);
600 if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
610 if (!ctx->cipher->do_cipher(ctx, out, in, inl))
616 memcpy(ctx->buf, &(in[inl]), i);
622 int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
623 const unsigned char *in, int inl)
626 size_t soutl, inl_ = (size_t)inl;
629 if (likely(outl != NULL)) {
632 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
636 /* Prevent accidental use of decryption context when encrypting */
637 if (unlikely(!ctx->encrypt)) {
638 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
642 if (unlikely(ctx->cipher == NULL)) {
643 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
647 if (unlikely(ctx->cipher->prov == NULL))
650 blocksize = ctx->cipher->block_size;
652 if (unlikely(ctx->cipher->cupdate == NULL || blocksize < 1)) {
653 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
657 ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
658 inl_ + (size_t)(blocksize == 1 ? 0 : blocksize),
662 if (soutl > INT_MAX) {
663 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
671 /* Code below to be removed when legacy support is dropped. */
674 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
677 int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
680 ret = EVP_EncryptFinal_ex(ctx, out, outl);
684 int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
687 unsigned int i, b, bl;
694 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
698 /* Prevent accidental use of decryption context when encrypting */
700 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
704 if (ctx->cipher == NULL) {
705 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
708 if (ctx->cipher->prov == NULL)
711 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
713 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
714 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
718 ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
719 blocksize == 1 ? 0 : blocksize);
722 if (soutl > INT_MAX) {
723 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
731 /* Code below to be removed when legacy support is dropped. */
734 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
735 ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
743 b = ctx->cipher->block_size;
744 OPENSSL_assert(b <= sizeof(ctx->buf));
750 if (ctx->flags & EVP_CIPH_NO_PADDING) {
752 ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
760 for (i = bl; i < b; i++)
762 ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b);
770 int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
771 const unsigned char *in, int inl)
773 int fix_len, cmpl = inl, ret;
775 size_t soutl, inl_ = (size_t)inl;
778 if (likely(outl != NULL)) {
781 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
785 /* Prevent accidental use of encryption context when decrypting */
786 if (unlikely(ctx->encrypt)) {
787 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
791 if (unlikely(ctx->cipher == NULL)) {
792 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
795 if (unlikely(ctx->cipher->prov == NULL))
798 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
800 if (unlikely(ctx->cipher->cupdate == NULL || blocksize < 1)) {
801 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
804 ret = ctx->cipher->cupdate(ctx->algctx, out, &soutl,
805 inl_ + (size_t)(blocksize == 1 ? 0 : blocksize),
809 if (soutl > INT_MAX) {
810 ERR_raise(ERR_LIB_EVP, EVP_R_UPDATE_ERROR);
818 /* Code below to be removed when legacy support is dropped. */
821 b = ctx->cipher->block_size;
823 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
824 cmpl = safe_div_round_up_int(cmpl, 8, NULL);
826 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
827 if (b == 1 && ossl_is_partially_overlapping(out, in, cmpl)) {
828 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
832 fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
846 if (ctx->flags & EVP_CIPH_NO_PADDING)
847 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
849 OPENSSL_assert(b <= sizeof(ctx->final));
851 if (ctx->final_used) {
852 /* see comment about PTRDIFF_T comparison above */
853 if (((PTRDIFF_T)out == (PTRDIFF_T)in)
854 || ossl_is_partially_overlapping(out, in, b)) {
855 ERR_raise(ERR_LIB_EVP, EVP_R_PARTIALLY_OVERLAPPING);
859 * final_used is only ever set if buf_len is 0. Therefore the maximum
860 * length output we will ever see from evp_EncryptDecryptUpdate is
861 * the maximum multiple of the block length that is <= inl, or just:
863 * Since final_used has been set then the final output length is:
864 * (inl & ~(b - 1)) + b
865 * This must never exceed INT_MAX
867 if ((inl & ~(b - 1)) > INT_MAX - b) {
868 ERR_raise(ERR_LIB_EVP, EVP_R_OUTPUT_WOULD_OVERFLOW);
871 memcpy(out, ctx->final, b);
877 if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl))
881 * if we have 'decrypted' a multiple of block size, make sure we have a
882 * copy of this last block
884 if (b > 1 && !ctx->buf_len) {
887 memcpy(ctx->final, &out[*outl], b);
897 int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
900 ret = EVP_DecryptFinal_ex(ctx, out, outl);
904 int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
915 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
919 /* Prevent accidental use of encryption context when decrypting */
921 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_OPERATION);
925 if (ctx->cipher == NULL) {
926 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
930 if (ctx->cipher->prov == NULL)
933 blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
935 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
936 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
940 ret = ctx->cipher->cfinal(ctx->algctx, out, &soutl,
941 blocksize == 1 ? 0 : blocksize);
944 if (soutl > INT_MAX) {
945 ERR_raise(ERR_LIB_EVP, EVP_R_FINAL_ERROR);
953 /* Code below to be removed when legacy support is dropped. */
957 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
958 i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
966 b = ctx->cipher->block_size;
967 if (ctx->flags & EVP_CIPH_NO_PADDING) {
969 ERR_raise(ERR_LIB_EVP, EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
976 if (ctx->buf_len || !ctx->final_used) {
977 ERR_raise(ERR_LIB_EVP, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
980 OPENSSL_assert(b <= sizeof(ctx->final));
983 * The following assumes that the ciphertext has been authenticated.
984 * Otherwise it provides a padding oracle.
986 n = ctx->final[b - 1];
987 if (n == 0 || n > (int)b) {
988 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
991 for (i = 0; i < n; i++) {
992 if (ctx->final[--b] != n) {
993 ERR_raise(ERR_LIB_EVP, EVP_R_BAD_DECRYPT);
997 n = ctx->cipher->block_size - n;
998 for (i = 0; i < n; i++)
999 out[i] = ctx->final[i];
1006 int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
1008 if (c->cipher->prov != NULL) {
1010 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1013 if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
1016 /* Check the cipher actually understands this parameter */
1017 if (OSSL_PARAM_locate_const(EVP_CIPHER_settable_ctx_params(c->cipher),
1018 OSSL_CIPHER_PARAM_KEYLEN) == NULL) {
1019 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
1023 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
1024 if (!OSSL_PARAM_set_int(params, keylen))
1026 ok = evp_do_ciph_ctx_setparams(c->cipher, c->algctx, params);
1029 c->key_len = keylen;
1033 /* Code below to be removed when legacy support is dropped. */
1036 * Note there have never been any built-in ciphers that define this flag
1037 * since it was first introduced.
1039 if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
1040 return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
1041 if (EVP_CIPHER_CTX_get_key_length(c) == keylen)
1043 if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
1044 c->key_len = keylen;
1047 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
1051 int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
1054 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1055 unsigned int pd = pad;
1058 ctx->flags &= ~EVP_CIPH_NO_PADDING;
1060 ctx->flags |= EVP_CIPH_NO_PADDING;
1062 if (ctx->cipher != NULL && ctx->cipher->prov == NULL)
1064 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd);
1065 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1070 int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1072 int ret = EVP_CTRL_RET_UNSUPPORTED;
1076 OSSL_PARAM params[4] = {
1077 OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
1080 if (ctx == NULL || ctx->cipher == NULL) {
1081 ERR_raise(ERR_LIB_EVP, EVP_R_NO_CIPHER_SET);
1085 if (ctx->cipher->prov == NULL)
1089 case EVP_CTRL_SET_KEY_LENGTH:
1092 if (ctx->key_len == arg)
1093 /* Skip calling into provider if unchanged. */
1095 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz);
1098 case EVP_CTRL_RAND_KEY: /* Used by DES */
1101 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY,
1107 * EVP_CTRL_INIT is purely legacy, no provider counterpart.
1108 * As a matter of fact, this should be dead code, but some caller
1109 * might still do a direct control call with this command, so...
1110 * Legacy methods return 1 except for exceptional circumstances, so
1111 * we do the same here to not be disruptive.
1114 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */
1117 case EVP_CTRL_AEAD_SET_IVLEN:
1120 if (ctx->iv_len == arg)
1121 /* Skip calling into provider if unchanged. */
1123 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1126 case EVP_CTRL_CCM_SET_L:
1127 if (arg < 2 || arg > 8)
1130 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1133 case EVP_CTRL_AEAD_SET_IV_FIXED:
1134 params[0] = OSSL_PARAM_construct_octet_string(
1135 OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED, ptr, sz);
1137 case EVP_CTRL_GCM_IV_GEN:
1140 sz = 0; /* special case that uses the iv length */
1141 params[0] = OSSL_PARAM_construct_octet_string(
1142 OSSL_CIPHER_PARAM_AEAD_TLS1_GET_IV_GEN, ptr, sz);
1144 case EVP_CTRL_GCM_SET_IV_INV:
1147 params[0] = OSSL_PARAM_construct_octet_string(
1148 OSSL_CIPHER_PARAM_AEAD_TLS1_SET_IV_INV, ptr, sz);
1150 case EVP_CTRL_GET_RC5_ROUNDS:
1151 set_params = 0; /* Fall thru */
1152 case EVP_CTRL_SET_RC5_ROUNDS:
1155 i = (unsigned int)arg;
1156 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i);
1158 case EVP_CTRL_SET_SPEED:
1161 i = (unsigned int)arg;
1162 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_SPEED, &i);
1164 case EVP_CTRL_AEAD_GET_TAG:
1165 set_params = 0; /* Fall thru */
1166 case EVP_CTRL_AEAD_SET_TAG:
1167 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
1170 case EVP_CTRL_AEAD_TLS1_AAD:
1171 /* This one does a set and a get - since it returns a size */
1173 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD,
1175 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1179 OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz);
1180 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1184 #ifndef OPENSSL_NO_RC2
1185 case EVP_CTRL_GET_RC2_KEY_BITS:
1186 set_params = 0; /* Fall thru */
1187 case EVP_CTRL_SET_RC2_KEY_BITS:
1188 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_RC2_KEYBITS, &sz);
1190 #endif /* OPENSSL_NO_RC2 */
1191 #if !defined(OPENSSL_NO_MULTIBLOCK)
1192 case EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE:
1193 params[0] = OSSL_PARAM_construct_size_t(
1194 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_SEND_FRAGMENT, &sz);
1195 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1199 params[0] = OSSL_PARAM_construct_size_t(
1200 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_MAX_BUFSIZE, &sz);
1201 params[1] = OSSL_PARAM_construct_end();
1202 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1206 case EVP_CTRL_TLS1_1_MULTIBLOCK_AAD: {
1207 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1208 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1210 if (arg < (int)sizeof(EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM))
1213 params[0] = OSSL_PARAM_construct_octet_string(
1214 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD, (void*)p->inp, p->len);
1215 params[1] = OSSL_PARAM_construct_uint(
1216 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1217 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1220 /* Retrieve the return values changed by the set */
1221 params[0] = OSSL_PARAM_construct_size_t(
1222 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_AAD_PACKLEN, &sz);
1223 params[1] = OSSL_PARAM_construct_uint(
1224 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1225 params[2] = OSSL_PARAM_construct_end();
1226 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1231 case EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT: {
1232 EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *p =
1233 (EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *)ptr;
1235 params[0] = OSSL_PARAM_construct_octet_string(
1236 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC, p->out, p->len);
1238 params[1] = OSSL_PARAM_construct_octet_string(
1239 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_IN, (void*)p->inp,
1241 params[2] = OSSL_PARAM_construct_uint(
1242 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_INTERLEAVE, &p->interleave);
1243 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1246 params[0] = OSSL_PARAM_construct_size_t(
1247 OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK_ENC_LEN, &sz);
1248 params[1] = OSSL_PARAM_construct_end();
1249 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1254 #endif /* OPENSSL_NO_MULTIBLOCK */
1255 case EVP_CTRL_AEAD_SET_MAC_KEY:
1258 params[0] = OSSL_PARAM_construct_octet_string(
1259 OSSL_CIPHER_PARAM_AEAD_MAC_KEY, ptr, sz);
1264 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
1266 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
1269 /* Code below to be removed when legacy support is dropped. */
1271 if (ctx->cipher->ctrl == NULL) {
1272 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_NOT_IMPLEMENTED);
1276 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
1279 if (ret == EVP_CTRL_RET_UNSUPPORTED) {
1280 ERR_raise(ERR_LIB_EVP, EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
1286 int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[])
1288 if (cipher != NULL && cipher->get_params != NULL)
1289 return cipher->get_params(params);
1293 int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[])
1296 const OSSL_PARAM *p;
1298 if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL) {
1299 r = ctx->cipher->set_ctx_params(ctx->algctx, params);
1301 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
1302 if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->key_len)) {
1308 p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN);
1309 if (p != NULL && !OSSL_PARAM_get_int(p, &ctx->iv_len)) {
1318 int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[])
1320 if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL)
1321 return ctx->cipher->get_ctx_params(ctx->algctx, params);
1325 const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher)
1327 if (cipher != NULL && cipher->gettable_params != NULL)
1328 return cipher->gettable_params(
1329 ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher)));
1333 const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher)
1337 if (cipher != NULL && cipher->settable_ctx_params != NULL) {
1338 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
1339 return cipher->settable_ctx_params(NULL, provctx);
1344 const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher)
1348 if (cipher != NULL && cipher->gettable_ctx_params != NULL) {
1349 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cipher));
1350 return cipher->gettable_ctx_params(NULL, provctx);
1355 const OSSL_PARAM *EVP_CIPHER_CTX_settable_params(EVP_CIPHER_CTX *cctx)
1359 if (cctx != NULL && cctx->cipher->settable_ctx_params != NULL) {
1360 alg = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
1361 return cctx->cipher->settable_ctx_params(cctx->algctx, alg);
1366 const OSSL_PARAM *EVP_CIPHER_CTX_gettable_params(EVP_CIPHER_CTX *cctx)
1370 if (cctx != NULL && cctx->cipher->gettable_ctx_params != NULL) {
1371 provctx = ossl_provider_ctx(EVP_CIPHER_get0_provider(cctx->cipher));
1372 return cctx->cipher->gettable_ctx_params(cctx->algctx, provctx);
1378 static OSSL_LIB_CTX *EVP_CIPHER_CTX_get_libctx(EVP_CIPHER_CTX *ctx)
1380 const EVP_CIPHER *cipher = ctx->cipher;
1381 const OSSL_PROVIDER *prov;
1386 prov = EVP_CIPHER_get0_provider(cipher);
1387 return ossl_provider_libctx(prov);
1391 int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
1393 if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
1394 return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
1401 OSSL_LIB_CTX *libctx = EVP_CIPHER_CTX_get_libctx(ctx);
1403 kl = EVP_CIPHER_CTX_get_key_length(ctx);
1404 if (kl <= 0 || RAND_priv_bytes_ex(libctx, key, kl, 0) <= 0)
1408 #endif /* FIPS_MODULE */
1411 EVP_CIPHER_CTX *EVP_CIPHER_CTX_dup(const EVP_CIPHER_CTX *in)
1413 EVP_CIPHER_CTX *out = EVP_CIPHER_CTX_new();
1415 if (out != NULL && !EVP_CIPHER_CTX_copy(out, in)) {
1416 EVP_CIPHER_CTX_free(out);
1422 int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
1424 if ((in == NULL) || (in->cipher == NULL)) {
1425 ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED);
1429 if (in->cipher->prov == NULL)
1432 if (in->cipher->dupctx == NULL) {
1433 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
1437 EVP_CIPHER_CTX_reset(out);
1442 if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) {
1443 out->fetched_cipher = NULL;
1447 out->algctx = in->cipher->dupctx(in->algctx);
1448 if (out->algctx == NULL) {
1449 ERR_raise(ERR_LIB_EVP, EVP_R_NOT_ABLE_TO_COPY_CTX);
1455 /* Code below to be removed when legacy support is dropped. */
1458 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
1459 /* Make sure it's safe to copy a cipher context using an ENGINE */
1460 if (in->engine && !ENGINE_init(in->engine)) {
1461 ERR_raise(ERR_LIB_EVP, ERR_R_ENGINE_LIB);
1466 EVP_CIPHER_CTX_reset(out);
1467 memcpy(out, in, sizeof(*out));
1469 if (in->cipher_data && in->cipher->ctx_size) {
1470 out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
1471 if (out->cipher_data == NULL) {
1475 memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
1478 if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
1479 if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
1481 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
1487 EVP_CIPHER *evp_cipher_new(void)
1489 EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
1491 if (cipher != NULL && !CRYPTO_NEW_REF(&cipher->refcnt, 1)) {
1492 OPENSSL_free(cipher);
1499 * FIPS module note: since internal fetches will be entirely
1500 * provider based, we know that none of its code depends on legacy
1501 * NIDs or any functionality that use them.
1504 /* After removal of legacy support get rid of the need for legacy NIDs */
1505 static void set_legacy_nid(const char *name, void *vlegacy_nid)
1508 int *legacy_nid = vlegacy_nid;
1510 * We use lowest level function to get the associated method, because
1511 * higher level functions such as EVP_get_cipherbyname() have changed
1512 * to look at providers too.
1514 const void *legacy_method = OBJ_NAME_get(name, OBJ_NAME_TYPE_CIPHER_METH);
1516 if (*legacy_nid == -1) /* We found a clash already */
1518 if (legacy_method == NULL)
1520 nid = EVP_CIPHER_get_nid(legacy_method);
1521 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
1529 static void *evp_cipher_from_algorithm(const int name_id,
1530 const OSSL_ALGORITHM *algodef,
1531 OSSL_PROVIDER *prov)
1533 const OSSL_DISPATCH *fns = algodef->implementation;
1534 EVP_CIPHER *cipher = NULL;
1535 int fnciphcnt = 0, fnctxcnt = 0;
1537 if ((cipher = evp_cipher_new()) == NULL) {
1538 ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB);
1543 cipher->nid = NID_undef;
1544 if (!evp_names_do_all(prov, name_id, set_legacy_nid, &cipher->nid)
1545 || cipher->nid == -1) {
1546 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1547 EVP_CIPHER_free(cipher);
1552 cipher->name_id = name_id;
1553 if ((cipher->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL) {
1554 EVP_CIPHER_free(cipher);
1557 cipher->description = algodef->algorithm_description;
1559 for (; fns->function_id != 0; fns++) {
1560 switch (fns->function_id) {
1561 case OSSL_FUNC_CIPHER_NEWCTX:
1562 if (cipher->newctx != NULL)
1564 cipher->newctx = OSSL_FUNC_cipher_newctx(fns);
1567 case OSSL_FUNC_CIPHER_ENCRYPT_INIT:
1568 if (cipher->einit != NULL)
1570 cipher->einit = OSSL_FUNC_cipher_encrypt_init(fns);
1573 case OSSL_FUNC_CIPHER_DECRYPT_INIT:
1574 if (cipher->dinit != NULL)
1576 cipher->dinit = OSSL_FUNC_cipher_decrypt_init(fns);
1579 case OSSL_FUNC_CIPHER_UPDATE:
1580 if (cipher->cupdate != NULL)
1582 cipher->cupdate = OSSL_FUNC_cipher_update(fns);
1585 case OSSL_FUNC_CIPHER_FINAL:
1586 if (cipher->cfinal != NULL)
1588 cipher->cfinal = OSSL_FUNC_cipher_final(fns);
1591 case OSSL_FUNC_CIPHER_CIPHER:
1592 if (cipher->ccipher != NULL)
1594 cipher->ccipher = OSSL_FUNC_cipher_cipher(fns);
1596 case OSSL_FUNC_CIPHER_FREECTX:
1597 if (cipher->freectx != NULL)
1599 cipher->freectx = OSSL_FUNC_cipher_freectx(fns);
1602 case OSSL_FUNC_CIPHER_DUPCTX:
1603 if (cipher->dupctx != NULL)
1605 cipher->dupctx = OSSL_FUNC_cipher_dupctx(fns);
1607 case OSSL_FUNC_CIPHER_GET_PARAMS:
1608 if (cipher->get_params != NULL)
1610 cipher->get_params = OSSL_FUNC_cipher_get_params(fns);
1612 case OSSL_FUNC_CIPHER_GET_CTX_PARAMS:
1613 if (cipher->get_ctx_params != NULL)
1615 cipher->get_ctx_params = OSSL_FUNC_cipher_get_ctx_params(fns);
1617 case OSSL_FUNC_CIPHER_SET_CTX_PARAMS:
1618 if (cipher->set_ctx_params != NULL)
1620 cipher->set_ctx_params = OSSL_FUNC_cipher_set_ctx_params(fns);
1622 case OSSL_FUNC_CIPHER_GETTABLE_PARAMS:
1623 if (cipher->gettable_params != NULL)
1625 cipher->gettable_params = OSSL_FUNC_cipher_gettable_params(fns);
1627 case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS:
1628 if (cipher->gettable_ctx_params != NULL)
1630 cipher->gettable_ctx_params =
1631 OSSL_FUNC_cipher_gettable_ctx_params(fns);
1633 case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS:
1634 if (cipher->settable_ctx_params != NULL)
1636 cipher->settable_ctx_params =
1637 OSSL_FUNC_cipher_settable_ctx_params(fns);
1641 if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4)
1642 || (fnciphcnt == 0 && cipher->ccipher == NULL)
1645 * In order to be a consistent set of functions we must have at least
1646 * a complete set of "encrypt" functions, or a complete set of "decrypt"
1647 * functions, or a single "cipher" function. In all cases we need both
1648 * the "newctx" and "freectx" functions.
1650 EVP_CIPHER_free(cipher);
1651 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1654 cipher->prov = prov;
1656 ossl_provider_up_ref(prov);
1658 if (!evp_cipher_cache_constants(cipher)) {
1659 EVP_CIPHER_free(cipher);
1660 ERR_raise(ERR_LIB_EVP, EVP_R_CACHE_CONSTANTS_FAILED);
1667 static int evp_cipher_up_ref(void *cipher)
1669 return EVP_CIPHER_up_ref(cipher);
1672 static void evp_cipher_free(void *cipher)
1674 EVP_CIPHER_free(cipher);
1677 EVP_CIPHER *EVP_CIPHER_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
1678 const char *properties)
1680 EVP_CIPHER *cipher =
1681 evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties,
1682 evp_cipher_from_algorithm, evp_cipher_up_ref,
1688 int EVP_CIPHER_up_ref(EVP_CIPHER *cipher)
1692 if (cipher->origin == EVP_ORIG_DYNAMIC)
1693 CRYPTO_UP_REF(&cipher->refcnt, &ref);
1697 void evp_cipher_free_int(EVP_CIPHER *cipher)
1699 OPENSSL_free(cipher->type_name);
1700 ossl_provider_free(cipher->prov);
1701 CRYPTO_FREE_REF(&cipher->refcnt);
1702 OPENSSL_free(cipher);
1705 void EVP_CIPHER_free(EVP_CIPHER *cipher)
1709 if (cipher == NULL || cipher->origin != EVP_ORIG_DYNAMIC)
1712 CRYPTO_DOWN_REF(&cipher->refcnt, &i);
1715 evp_cipher_free_int(cipher);
1718 void EVP_CIPHER_do_all_provided(OSSL_LIB_CTX *libctx,
1719 void (*fn)(EVP_CIPHER *mac, void *arg),
1722 evp_generic_do_all(libctx, OSSL_OP_CIPHER,
1723 (void (*)(void *, void *))fn, arg,
1724 evp_cipher_from_algorithm, evp_cipher_up_ref,