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_id_aes256_wrap:
175 case NID_id_aes256_wrap_pad:
176 case NID_id_aes192_wrap:
177 case NID_id_aes192_wrap_pad:
178 case NID_id_aes128_wrap:
179 case NID_id_aes128_wrap_pad:
180 case NID_aria_256_gcm:
181 case NID_aria_192_gcm:
182 case NID_aria_128_gcm:
183 case NID_aes_256_ccm:
184 case NID_aes_192_ccm:
185 case NID_aes_128_ccm:
186 case NID_aria_256_ccm:
187 case NID_aria_192_ccm:
188 case NID_aria_128_ccm:
189 case NID_aria_256_ecb:
190 case NID_aria_192_ecb:
191 case NID_aria_128_ecb:
192 case NID_aria_256_cbc:
193 case NID_aria_192_cbc:
194 case NID_aria_128_cbc:
195 case NID_aria_256_ofb128:
196 case NID_aria_192_ofb128:
197 case NID_aria_128_ofb128:
198 case NID_aria_256_cfb128:
199 case NID_aria_192_cfb128:
200 case NID_aria_128_cfb128:
201 case NID_aria_256_cfb1:
202 case NID_aria_192_cfb1:
203 case NID_aria_128_cfb1:
204 case NID_aria_256_cfb8:
205 case NID_aria_192_cfb8:
206 case NID_aria_128_cfb8:
207 case NID_aria_256_ctr:
208 case NID_aria_192_ctr:
209 case NID_aria_128_ctr:
210 case NID_camellia_256_ecb:
211 case NID_camellia_192_ecb:
212 case NID_camellia_128_ecb:
213 case NID_camellia_256_cbc:
214 case NID_camellia_192_cbc:
215 case NID_camellia_128_cbc:
216 case NID_camellia_256_ofb128:
217 case NID_camellia_192_ofb128:
218 case NID_camellia_128_ofb128:
219 case NID_camellia_256_cfb128:
220 case NID_camellia_192_cfb128:
221 case NID_camellia_128_cfb128:
222 case NID_camellia_256_cfb1:
223 case NID_camellia_192_cfb1:
224 case NID_camellia_128_cfb1:
225 case NID_camellia_256_cfb8:
226 case NID_camellia_192_cfb8:
227 case NID_camellia_128_cfb8:
228 case NID_camellia_256_ctr:
229 case NID_camellia_192_ctr:
230 case NID_camellia_128_ctr:
231 case NID_des_ede3_cbc:
232 case NID_des_ede3_ecb:
233 case NID_des_ede3_ofb64:
234 case NID_des_ede3_cfb64:
235 case NID_des_ede3_cfb8:
236 case NID_des_ede3_cfb1:
237 case NID_des_ede_cbc:
238 case NID_des_ede_ecb:
239 case NID_des_ede_ofb64:
240 case NID_des_ede_cfb64:
248 case NID_id_smime_alg_CMS3DESwrap:
259 case NID_cast5_cfb64:
260 case NID_cast5_ofb64:
263 case NID_seed_cfb128:
264 case NID_seed_ofb128:
283 * Ensure a context left lying around from last time is cleared
286 if (cipher != NULL && ctx->cipher != NULL) {
287 OPENSSL_clear_free(ctx->cipher_data, ctx->cipher->ctx_size);
288 ctx->cipher_data = NULL;
292 /* TODO(3.0): Start of non-legacy code below */
294 /* Ensure a context left lying around from last time is cleared */
295 if (cipher != NULL && ctx->cipher != NULL) {
296 unsigned long flags = ctx->flags;
298 EVP_CIPHER_CTX_reset(ctx);
299 /* Restore encrypt and flags */
305 cipher = ctx->cipher;
307 if (cipher->prov == NULL) {
309 /* We only do explict fetches inside the FIPS module */
310 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
313 EVP_CIPHER *provciph =
314 EVP_CIPHER_fetch(NULL, OBJ_nid2sn(cipher->nid), "");
316 if (provciph == NULL) {
317 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
321 EVP_CIPHER_free(ctx->fetched_cipher);
322 ctx->fetched_cipher = provciph;
326 ctx->cipher = cipher;
327 if (ctx->provctx == NULL) {
328 ctx->provctx = ctx->cipher->newctx(ossl_provider_ctx(cipher->prov));
329 if (ctx->provctx == NULL) {
330 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
335 if ((ctx->flags & EVP_CIPH_NO_PADDING) != 0) {
337 * If this ctx was already set up for no padding then we need to tell
338 * the new cipher about it.
340 if (!EVP_CIPHER_CTX_set_padding(ctx, 0))
344 switch (EVP_CIPHER_mode(ctx->cipher)) {
345 case EVP_CIPH_CFB_MODE:
346 case EVP_CIPH_OFB_MODE:
347 case EVP_CIPH_CBC_MODE:
348 /* For these modes we remember the original IV for later use */
349 if (!ossl_assert(EVP_CIPHER_CTX_iv_length(ctx) <= (int)sizeof(ctx->oiv))) {
350 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
354 memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
358 if (ctx->cipher->einit == NULL) {
359 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
363 return ctx->cipher->einit(ctx->provctx,
366 : EVP_CIPHER_CTX_key_length(ctx),
369 : EVP_CIPHER_CTX_iv_length(ctx));
372 if (ctx->cipher->dinit == NULL) {
373 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
377 return ctx->cipher->dinit(ctx->provctx,
380 : EVP_CIPHER_CTX_key_length(ctx),
383 : EVP_CIPHER_CTX_iv_length(ctx));
385 /* TODO(3.0): Remove legacy code below */
388 if (cipher != NULL) {
390 * Ensure a context left lying around from last time is cleared (we
391 * previously attempted to avoid this if the same ENGINE and
392 * EVP_CIPHER could be used).
395 unsigned long flags = ctx->flags;
396 EVP_CIPHER_CTX_reset(ctx);
397 /* Restore encrypt and flags */
401 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
403 if (!ENGINE_init(impl)) {
404 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
411 /* There's an ENGINE for this job ... (apparently) */
412 const EVP_CIPHER *c = ENGINE_get_cipher(impl, cipher->nid);
416 * One positive side-effect of US's export control history,
417 * is that we should at least be able to avoid using US
418 * misspellings of "initialisation"?
420 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
423 /* We'll use the ENGINE's private cipher definition */
426 * Store the ENGINE functional reference so we know 'cipher' came
427 * from an ENGINE and we need to release it when done.
435 ctx->cipher = cipher;
436 if (ctx->cipher->ctx_size) {
437 ctx->cipher_data = OPENSSL_zalloc(ctx->cipher->ctx_size);
438 if (ctx->cipher_data == NULL) {
440 EVPerr(EVP_F_EVP_CIPHERINIT_EX, ERR_R_MALLOC_FAILURE);
444 ctx->cipher_data = NULL;
446 ctx->key_len = cipher->key_len;
447 /* Preserve wrap enable flag, zero everything else */
448 ctx->flags &= EVP_CIPHER_CTX_FLAG_WRAP_ALLOW;
449 if (ctx->cipher->flags & EVP_CIPH_CTRL_INIT) {
450 if (!EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_INIT, 0, NULL)) {
452 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_INITIALIZATION_ERROR);
457 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
460 if (ctx->cipher == NULL)
463 /* we assume block size is a power of 2 in *cryptUpdate */
464 OPENSSL_assert(ctx->cipher->block_size == 1
465 || ctx->cipher->block_size == 8
466 || ctx->cipher->block_size == 16);
468 if (!(ctx->flags & EVP_CIPHER_CTX_FLAG_WRAP_ALLOW)
469 && EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_WRAP_MODE) {
470 EVPerr(EVP_F_EVP_CIPHERINIT_EX, EVP_R_WRAP_MODE_NOT_ALLOWED);
474 if (!(EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(ctx)) & EVP_CIPH_CUSTOM_IV)) {
475 switch (EVP_CIPHER_CTX_mode(ctx)) {
477 case EVP_CIPH_STREAM_CIPHER:
478 case EVP_CIPH_ECB_MODE:
481 case EVP_CIPH_CFB_MODE:
482 case EVP_CIPH_OFB_MODE:
487 case EVP_CIPH_CBC_MODE:
489 OPENSSL_assert(EVP_CIPHER_CTX_iv_length(ctx) <=
490 (int)sizeof(ctx->iv));
492 memcpy(ctx->oiv, iv, EVP_CIPHER_CTX_iv_length(ctx));
493 memcpy(ctx->iv, ctx->oiv, EVP_CIPHER_CTX_iv_length(ctx));
496 case EVP_CIPH_CTR_MODE:
498 /* Don't reuse IV for CTR mode */
500 memcpy(ctx->iv, iv, EVP_CIPHER_CTX_iv_length(ctx));
508 if (key || (ctx->cipher->flags & EVP_CIPH_ALWAYS_CALL_INIT)) {
509 if (!ctx->cipher->init(ctx, key, iv, enc))
514 ctx->block_mask = ctx->cipher->block_size - 1;
518 int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
519 const unsigned char *in, int inl)
522 return EVP_EncryptUpdate(ctx, out, outl, in, inl);
524 return EVP_DecryptUpdate(ctx, out, outl, in, inl);
527 int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
530 return EVP_EncryptFinal_ex(ctx, out, outl);
532 return EVP_DecryptFinal_ex(ctx, out, outl);
535 int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
538 return EVP_EncryptFinal(ctx, out, outl);
540 return EVP_DecryptFinal(ctx, out, outl);
543 int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
544 const unsigned char *key, const unsigned char *iv)
546 return EVP_CipherInit(ctx, cipher, key, iv, 1);
549 int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
550 ENGINE *impl, const unsigned char *key,
551 const unsigned char *iv)
553 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 1);
556 int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
557 const unsigned char *key, const unsigned char *iv)
559 return EVP_CipherInit(ctx, cipher, key, iv, 0);
562 int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
563 ENGINE *impl, const unsigned char *key,
564 const unsigned char *iv)
566 return EVP_CipherInit_ex(ctx, cipher, impl, key, iv, 0);
570 * According to the letter of standard difference between pointers
571 * is specified to be valid only within same object. This makes
572 * it formally challenging to determine if input and output buffers
573 * are not partially overlapping with standard pointer arithmetic.
578 #if defined(OPENSSL_SYS_VMS) && __INITIAL_POINTER_SIZE==64
580 * Then we have VMS that distinguishes itself by adhering to
581 * sizeof(size_t)==4 even in 64-bit builds, which means that
582 * difference between two pointers might be truncated to 32 bits.
583 * In the context one can even wonder how comparison for
584 * equality is implemented. To be on the safe side we adhere to
585 * PTRDIFF_T even for comparison for equality.
587 # define PTRDIFF_T uint64_t
589 # define PTRDIFF_T size_t
592 int is_partially_overlapping(const void *ptr1, const void *ptr2, int len)
594 PTRDIFF_T diff = (PTRDIFF_T)ptr1-(PTRDIFF_T)ptr2;
596 * Check for partially overlapping buffers. [Binary logical
597 * operations are used instead of boolean to minimize number
598 * of conditional branches.]
600 int overlapped = (len > 0) & (diff != 0) & ((diff < (PTRDIFF_T)len) |
601 (diff > (0 - (PTRDIFF_T)len)));
606 static int evp_EncryptDecryptUpdate(EVP_CIPHER_CTX *ctx,
607 unsigned char *out, int *outl,
608 const unsigned char *in, int inl)
610 int i, j, bl, cmpl = inl;
612 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
613 cmpl = (cmpl + 7) / 8;
615 bl = ctx->cipher->block_size;
617 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
618 /* If block size > 1 then the cipher will have to do this check */
619 if (bl == 1 && is_partially_overlapping(out, in, cmpl)) {
620 EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
624 i = ctx->cipher->do_cipher(ctx, out, in, inl);
636 if (is_partially_overlapping(out + ctx->buf_len, in, cmpl)) {
637 EVPerr(EVP_F_EVP_ENCRYPTDECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
641 if (ctx->buf_len == 0 && (inl & (ctx->block_mask)) == 0) {
642 if (ctx->cipher->do_cipher(ctx, out, in, inl)) {
651 OPENSSL_assert(bl <= (int)sizeof(ctx->buf));
654 memcpy(&(ctx->buf[i]), in, inl);
660 memcpy(&(ctx->buf[i]), in, j);
663 if (!ctx->cipher->do_cipher(ctx, out, ctx->buf, bl))
673 if (!ctx->cipher->do_cipher(ctx, out, in, inl))
679 memcpy(ctx->buf, &(in[inl]), i);
685 int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
686 const unsigned char *in, int inl)
692 /* Prevent accidental use of decryption context when encrypting */
694 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_INVALID_OPERATION);
698 if (ctx->cipher == NULL) {
699 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_NO_CIPHER_SET);
703 if (ctx->cipher->prov == NULL)
706 blocksize = EVP_CIPHER_CTX_block_size(ctx);
708 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
709 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR);
712 ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl,
713 inl + (blocksize == 1 ? 0 : blocksize), in,
717 if (soutl > INT_MAX) {
718 EVPerr(EVP_F_EVP_ENCRYPTUPDATE, EVP_R_UPDATE_ERROR);
726 /* TODO(3.0): Remove legacy code below */
729 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
732 int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
735 ret = EVP_EncryptFinal_ex(ctx, out, outl);
739 int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
742 unsigned int i, b, bl;
746 /* Prevent accidental use of decryption context when encrypting */
748 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_INVALID_OPERATION);
752 if (ctx->cipher == NULL) {
753 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_NO_CIPHER_SET);
756 if (ctx->cipher->prov == NULL)
759 blocksize = EVP_CIPHER_CTX_block_size(ctx);
761 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
762 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR);
766 ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl,
767 blocksize == 1 ? 0 : blocksize);
770 if (soutl > INT_MAX) {
771 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX, EVP_R_FINAL_ERROR);
779 /* TODO(3.0): Remove legacy code below */
782 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
783 ret = ctx->cipher->do_cipher(ctx, out, NULL, 0);
791 b = ctx->cipher->block_size;
792 OPENSSL_assert(b <= sizeof(ctx->buf));
798 if (ctx->flags & EVP_CIPH_NO_PADDING) {
800 EVPerr(EVP_F_EVP_ENCRYPTFINAL_EX,
801 EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
809 for (i = bl; i < b; i++)
811 ret = ctx->cipher->do_cipher(ctx, out, ctx->buf, b);
819 int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl,
820 const unsigned char *in, int inl)
822 int fix_len, cmpl = inl, ret;
827 /* Prevent accidental use of encryption context when decrypting */
829 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_INVALID_OPERATION);
833 if (ctx->cipher == NULL) {
834 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_NO_CIPHER_SET);
837 if (ctx->cipher->prov == NULL)
840 blocksize = EVP_CIPHER_CTX_block_size(ctx);
842 if (ctx->cipher->cupdate == NULL || blocksize < 1) {
843 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR);
846 ret = ctx->cipher->cupdate(ctx->provctx, out, &soutl,
847 inl + (blocksize == 1 ? 0 : blocksize), in,
851 if (soutl > INT_MAX) {
852 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_UPDATE_ERROR);
860 /* TODO(3.0): Remove legacy code below */
863 b = ctx->cipher->block_size;
865 if (EVP_CIPHER_CTX_test_flags(ctx, EVP_CIPH_FLAG_LENGTH_BITS))
866 cmpl = (cmpl + 7) / 8;
868 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
869 if (b == 1 && is_partially_overlapping(out, in, cmpl)) {
870 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
874 fix_len = ctx->cipher->do_cipher(ctx, out, in, inl);
888 if (ctx->flags & EVP_CIPH_NO_PADDING)
889 return evp_EncryptDecryptUpdate(ctx, out, outl, in, inl);
891 OPENSSL_assert(b <= sizeof(ctx->final));
893 if (ctx->final_used) {
894 /* see comment about PTRDIFF_T comparison above */
895 if (((PTRDIFF_T)out == (PTRDIFF_T)in)
896 || is_partially_overlapping(out, in, b)) {
897 EVPerr(EVP_F_EVP_DECRYPTUPDATE, EVP_R_PARTIALLY_OVERLAPPING);
900 memcpy(out, ctx->final, b);
906 if (!evp_EncryptDecryptUpdate(ctx, out, outl, in, inl))
910 * if we have 'decrypted' a multiple of block size, make sure we have a
911 * copy of this last block
913 if (b > 1 && !ctx->buf_len) {
916 memcpy(ctx->final, &out[*outl], b);
926 int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
929 ret = EVP_DecryptFinal_ex(ctx, out, outl);
933 int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl)
941 /* Prevent accidental use of encryption context when decrypting */
943 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_INVALID_OPERATION);
947 if (ctx->cipher == NULL) {
948 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_NO_CIPHER_SET);
952 if (ctx->cipher->prov == NULL)
955 blocksize = EVP_CIPHER_CTX_block_size(ctx);
957 if (blocksize < 1 || ctx->cipher->cfinal == NULL) {
958 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR);
962 ret = ctx->cipher->cfinal(ctx->provctx, out, &soutl,
963 blocksize == 1 ? 0 : blocksize);
966 if (soutl > INT_MAX) {
967 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_FINAL_ERROR);
975 /* TODO(3.0): Remove legacy code below */
979 if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) {
980 i = ctx->cipher->do_cipher(ctx, out, NULL, 0);
988 b = ctx->cipher->block_size;
989 if (ctx->flags & EVP_CIPH_NO_PADDING) {
991 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,
992 EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH);
999 if (ctx->buf_len || !ctx->final_used) {
1000 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_WRONG_FINAL_BLOCK_LENGTH);
1003 OPENSSL_assert(b <= sizeof(ctx->final));
1006 * The following assumes that the ciphertext has been authenticated.
1007 * Otherwise it provides a padding oracle.
1009 n = ctx->final[b - 1];
1010 if (n == 0 || n > (int)b) {
1011 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT);
1014 for (i = 0; i < n; i++) {
1015 if (ctx->final[--b] != n) {
1016 EVPerr(EVP_F_EVP_DECRYPTFINAL_EX, EVP_R_BAD_DECRYPT);
1020 n = ctx->cipher->block_size - n;
1021 for (i = 0; i < n; i++)
1022 out[i] = ctx->final[i];
1029 int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *c, int keylen)
1032 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1033 size_t len = keylen;
1035 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
1036 ok = evp_do_ciph_ctx_setparams(c->cipher, c->provctx, params);
1038 if (ok != EVP_CTRL_RET_UNSUPPORTED)
1041 /* TODO(3.0) legacy code follows */
1042 if (c->cipher->flags & EVP_CIPH_CUSTOM_KEY_LENGTH)
1043 return EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_KEY_LENGTH, keylen, NULL);
1044 if (EVP_CIPHER_CTX_key_length(c) == keylen)
1046 if ((keylen > 0) && (c->cipher->flags & EVP_CIPH_VARIABLE_LENGTH)) {
1047 c->key_len = keylen;
1050 EVPerr(EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH, EVP_R_INVALID_KEY_LENGTH);
1054 int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *ctx, int pad)
1057 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1058 unsigned int pd = pad;
1061 ctx->flags &= ~EVP_CIPH_NO_PADDING;
1063 ctx->flags |= EVP_CIPH_NO_PADDING;
1065 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_PADDING, &pd);
1066 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1071 int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
1073 int ret = EVP_CTRL_RET_UNSUPPORTED;
1077 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
1079 if (ctx == NULL || ctx->cipher == NULL) {
1080 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_NO_CIPHER_SET);
1084 if (ctx->cipher->prov == NULL)
1088 case EVP_CTRL_SET_KEY_LENGTH:
1089 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &sz);
1091 case EVP_CTRL_RAND_KEY: /* Used by DES */
1094 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_RANDOM_KEY,
1098 case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS: /* Used by DASYNC */
1099 case EVP_CTRL_INIT: /* TODO(3.0) Purely legacy, no provider counterpart */
1101 return EVP_CTRL_RET_UNSUPPORTED;
1102 case EVP_CTRL_GET_IV:
1104 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV,
1107 case EVP_CTRL_AEAD_SET_IVLEN:
1110 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &sz);
1112 case EVP_CTRL_GCM_SET_IV_FIXED:
1114 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED,
1117 case EVP_CTRL_GET_RC5_ROUNDS:
1118 set_params = 0; /* Fall thru */
1119 case EVP_CTRL_SET_RC5_ROUNDS:
1122 i = (unsigned int)arg;
1123 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_ROUNDS, &i);
1125 case EVP_CTRL_AEAD_GET_TAG:
1126 set_params = 0; /* Fall thru */
1127 case EVP_CTRL_AEAD_SET_TAG:
1128 params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG,
1131 case EVP_CTRL_AEAD_TLS1_AAD:
1132 /* This one does a set and a get - since it returns a padding size */
1134 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD,
1136 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1140 OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, &sz);
1141 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1148 ret = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
1150 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
1153 /* TODO(3.0): Remove legacy code below */
1155 if (ctx->cipher->ctrl == NULL) {
1156 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL, EVP_R_CTRL_NOT_IMPLEMENTED);
1160 ret = ctx->cipher->ctrl(ctx, type, arg, ptr);
1163 if (ret == EVP_CTRL_RET_UNSUPPORTED) {
1164 EVPerr(EVP_F_EVP_CIPHER_CTX_CTRL,
1165 EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED);
1171 int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[])
1173 if (cipher != NULL && cipher->get_params != NULL)
1174 return cipher->get_params(params);
1178 int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[])
1180 if (ctx->cipher != NULL && ctx->cipher->set_ctx_params != NULL)
1181 return ctx->cipher->set_ctx_params(ctx->provctx, params);
1185 int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[])
1187 if (ctx->cipher != NULL && ctx->cipher->get_ctx_params != NULL)
1188 return ctx->cipher->get_ctx_params(ctx->provctx, params);
1192 const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher)
1194 if (cipher != NULL && cipher->gettable_params != NULL)
1195 return cipher->gettable_params();
1199 const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher)
1201 if (cipher != NULL && cipher->settable_ctx_params != NULL)
1202 return cipher->settable_ctx_params();
1206 const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher)
1208 if (cipher != NULL && cipher->gettable_ctx_params != NULL)
1209 return cipher->gettable_ctx_params();
1213 int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key)
1215 if (ctx->cipher->flags & EVP_CIPH_RAND_KEY)
1216 return EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_RAND_KEY, 0, key);
1224 kl = EVP_CIPHER_CTX_key_length(ctx);
1225 if (kl <= 0 || RAND_priv_bytes(key, kl) <= 0)
1229 #endif /* FIPS_MODE */
1232 int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in)
1234 if ((in == NULL) || (in->cipher == NULL)) {
1235 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INPUT_NOT_INITIALIZED);
1239 if (in->cipher->prov == NULL)
1242 if (in->cipher->dupctx == NULL) {
1243 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX);
1247 EVP_CIPHER_CTX_reset(out);
1250 out->provctx = NULL;
1252 if (in->fetched_cipher != NULL && !EVP_CIPHER_up_ref(in->fetched_cipher)) {
1253 out->fetched_cipher = NULL;
1257 out->provctx = in->cipher->dupctx(in->provctx);
1258 if (out->provctx == NULL) {
1259 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_NOT_ABLE_TO_COPY_CTX);
1265 /* TODO(3.0): Remove legacy code below */
1268 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
1269 /* Make sure it's safe to copy a cipher context using an ENGINE */
1270 if (in->engine && !ENGINE_init(in->engine)) {
1271 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_ENGINE_LIB);
1276 EVP_CIPHER_CTX_reset(out);
1277 memcpy(out, in, sizeof(*out));
1279 if (in->cipher_data && in->cipher->ctx_size) {
1280 out->cipher_data = OPENSSL_malloc(in->cipher->ctx_size);
1281 if (out->cipher_data == NULL) {
1283 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, ERR_R_MALLOC_FAILURE);
1286 memcpy(out->cipher_data, in->cipher_data, in->cipher->ctx_size);
1289 if (in->cipher->flags & EVP_CIPH_CUSTOM_COPY)
1290 if (!in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out)) {
1292 EVPerr(EVP_F_EVP_CIPHER_CTX_COPY, EVP_R_INITIALIZATION_ERROR);
1298 EVP_CIPHER *evp_cipher_new(void)
1300 EVP_CIPHER *cipher = OPENSSL_zalloc(sizeof(EVP_CIPHER));
1302 if (cipher != NULL) {
1303 cipher->lock = CRYPTO_THREAD_lock_new();
1304 if (cipher->lock == NULL) {
1305 OPENSSL_free(cipher);
1314 * FIPS module note: since internal fetches will be entirely
1315 * provider based, we know that none of its code depends on legacy
1316 * NIDs or any functionality that use them.
1319 /* TODO(3.x) get rid of the need for legacy NIDs */
1320 static void set_legacy_nid(const char *name, void *vlegacy_nid)
1323 int *legacy_nid = vlegacy_nid;
1325 if (*legacy_nid == -1) /* We found a clash already */
1327 if ((nid = OBJ_sn2nid(name)) == NID_undef
1328 && (nid = OBJ_ln2nid(name)) == NID_undef)
1330 if (*legacy_nid != NID_undef && *legacy_nid != nid) {
1338 static void *evp_cipher_from_dispatch(const int name_id,
1339 const OSSL_DISPATCH *fns,
1340 OSSL_PROVIDER *prov,
1343 EVP_CIPHER *cipher = NULL;
1344 int fnciphcnt = 0, fnctxcnt = 0;
1346 if ((cipher = evp_cipher_new()) == NULL) {
1347 EVPerr(0, ERR_R_MALLOC_FAILURE);
1352 /* TODO(3.x) get rid of the need for legacy NIDs */
1353 cipher->nid = NID_undef;
1354 evp_doall_names(prov, name_id, set_legacy_nid, &cipher->nid);
1355 if (cipher->nid == -1) {
1356 ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
1357 EVP_CIPHER_free(cipher);
1362 cipher->name_id = name_id;
1364 for (; fns->function_id != 0; fns++) {
1365 switch (fns->function_id) {
1366 case OSSL_FUNC_CIPHER_NEWCTX:
1367 if (cipher->newctx != NULL)
1369 cipher->newctx = OSSL_get_OP_cipher_newctx(fns);
1372 case OSSL_FUNC_CIPHER_ENCRYPT_INIT:
1373 if (cipher->einit != NULL)
1375 cipher->einit = OSSL_get_OP_cipher_encrypt_init(fns);
1378 case OSSL_FUNC_CIPHER_DECRYPT_INIT:
1379 if (cipher->dinit != NULL)
1381 cipher->dinit = OSSL_get_OP_cipher_decrypt_init(fns);
1384 case OSSL_FUNC_CIPHER_UPDATE:
1385 if (cipher->cupdate != NULL)
1387 cipher->cupdate = OSSL_get_OP_cipher_update(fns);
1390 case OSSL_FUNC_CIPHER_FINAL:
1391 if (cipher->cfinal != NULL)
1393 cipher->cfinal = OSSL_get_OP_cipher_final(fns);
1396 case OSSL_FUNC_CIPHER_CIPHER:
1397 if (cipher->ccipher != NULL)
1399 cipher->ccipher = OSSL_get_OP_cipher_cipher(fns);
1401 case OSSL_FUNC_CIPHER_FREECTX:
1402 if (cipher->freectx != NULL)
1404 cipher->freectx = OSSL_get_OP_cipher_freectx(fns);
1407 case OSSL_FUNC_CIPHER_DUPCTX:
1408 if (cipher->dupctx != NULL)
1410 cipher->dupctx = OSSL_get_OP_cipher_dupctx(fns);
1412 case OSSL_FUNC_CIPHER_GET_PARAMS:
1413 if (cipher->get_params != NULL)
1415 cipher->get_params = OSSL_get_OP_cipher_get_params(fns);
1417 case OSSL_FUNC_CIPHER_GET_CTX_PARAMS:
1418 if (cipher->get_ctx_params != NULL)
1420 cipher->get_ctx_params = OSSL_get_OP_cipher_get_ctx_params(fns);
1422 case OSSL_FUNC_CIPHER_SET_CTX_PARAMS:
1423 if (cipher->set_ctx_params != NULL)
1425 cipher->set_ctx_params = OSSL_get_OP_cipher_set_ctx_params(fns);
1427 case OSSL_FUNC_CIPHER_GETTABLE_PARAMS:
1428 if (cipher->gettable_params != NULL)
1430 cipher->gettable_params = OSSL_get_OP_cipher_gettable_params(fns);
1432 case OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS:
1433 if (cipher->gettable_ctx_params != NULL)
1435 cipher->gettable_ctx_params =
1436 OSSL_get_OP_cipher_gettable_ctx_params(fns);
1438 case OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS:
1439 if (cipher->settable_ctx_params != NULL)
1441 cipher->settable_ctx_params =
1442 OSSL_get_OP_cipher_settable_ctx_params(fns);
1446 if ((fnciphcnt != 0 && fnciphcnt != 3 && fnciphcnt != 4)
1447 || (fnciphcnt == 0 && cipher->ccipher == NULL)
1450 * In order to be a consistent set of functions we must have at least
1451 * a complete set of "encrypt" functions, or a complete set of "decrypt"
1452 * functions, or a single "cipher" function. In all cases we need both
1453 * the "newctx" and "freectx" functions.
1455 EVP_CIPHER_free(cipher);
1456 EVPerr(EVP_F_EVP_CIPHER_FROM_DISPATCH, EVP_R_INVALID_PROVIDER_FUNCTIONS);
1459 cipher->prov = prov;
1461 ossl_provider_up_ref(prov);
1466 static int evp_cipher_up_ref(void *cipher)
1468 return EVP_CIPHER_up_ref(cipher);
1471 static void evp_cipher_free(void *cipher)
1473 EVP_CIPHER_free(cipher);
1476 EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm,
1477 const char *properties)
1479 EVP_CIPHER *cipher =
1480 evp_generic_fetch(ctx, OSSL_OP_CIPHER, algorithm, properties,
1481 evp_cipher_from_dispatch, NULL, evp_cipher_up_ref,
1487 int EVP_CIPHER_up_ref(EVP_CIPHER *cipher)
1491 CRYPTO_UP_REF(&cipher->refcnt, &ref, cipher->lock);
1495 void EVP_CIPHER_free(EVP_CIPHER *cipher)
1502 CRYPTO_DOWN_REF(&cipher->refcnt, &i, cipher->lock);
1505 ossl_provider_free(cipher->prov);
1506 CRYPTO_THREAD_lock_free(cipher->lock);
1507 OPENSSL_free(cipher);
1510 void EVP_CIPHER_do_all_ex(OPENSSL_CTX *libctx,
1511 void (*fn)(EVP_CIPHER *mac, void *arg),
1514 evp_generic_do_all(libctx, OSSL_OP_CIPHER,
1515 (void (*)(void *, void *))fn, arg,
1516 evp_cipher_from_dispatch, NULL, evp_cipher_free);