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
11 * EVP _meth_ APIs are deprecated for public use, but still ok for
14 #include "internal/deprecated.h"
18 #include "internal/cryptlib.h"
19 #include <openssl/evp.h>
20 #include <openssl/objects.h>
21 #include <openssl/params.h>
22 #include <openssl/core_names.h>
23 #include <openssl/rsa.h>
24 #include <openssl/dh.h>
25 #include <openssl/ec.h>
26 #include "crypto/evp.h"
27 #include "internal/provider.h"
28 #include "evp_local.h"
30 #if !defined(FIPS_MODULE)
31 # include "crypto/asn1.h"
33 int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
35 return evp_cipher_param_to_asn1_ex(c, type, NULL);
38 int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
40 return evp_cipher_asn1_to_param_ex(c, type, NULL);
43 int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *ctx, ASN1_TYPE *type)
49 unsigned char iv[EVP_MAX_IV_LENGTH];
51 l = EVP_CIPHER_CTX_get_iv_length(ctx);
52 if (!ossl_assert(l <= sizeof(iv)))
54 i = ASN1_TYPE_get_octetstring(type, iv, l);
58 if (!EVP_CipherInit_ex(ctx, NULL, NULL, NULL, iv, -1))
64 int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
68 unsigned char *oiv = NULL;
71 oiv = (unsigned char *)EVP_CIPHER_CTX_original_iv(c);
72 j = EVP_CIPHER_CTX_get_iv_length(c);
73 OPENSSL_assert(j <= sizeof(c->iv));
74 i = ASN1_TYPE_set_octetstring(type, oiv, j);
79 int evp_cipher_param_to_asn1_ex(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
80 evp_cipher_aead_asn1_params *asn1_params)
82 int ret = -1; /* Assume the worst */
83 const EVP_CIPHER *cipher = c->cipher;
86 * For legacy implementations, we detect custom AlgorithmIdentifier
87 * parameter handling by checking if the function pointer
88 * cipher->set_asn1_parameters is set. We know that this pointer
89 * is NULL for provided implementations.
91 * Otherwise, for any implementation, we check the flag
92 * EVP_CIPH_FLAG_CUSTOM_ASN1. If it isn't set, we apply
93 * default AI parameter extraction.
95 * Otherwise, for provided implementations, we convert |type| to
96 * a DER encoded blob and pass to the implementation in OSSL_PARAM
99 * If none of the above applies, this operation is unsupported.
101 if (cipher->set_asn1_parameters != NULL) {
102 ret = cipher->set_asn1_parameters(c, type);
103 } else if ((EVP_CIPHER_get_flags(cipher) & EVP_CIPH_FLAG_CUSTOM_ASN1) == 0) {
104 switch (EVP_CIPHER_get_mode(cipher)) {
105 case EVP_CIPH_WRAP_MODE:
106 if (EVP_CIPHER_is_a(cipher, SN_id_smime_alg_CMS3DESwrap))
107 ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
111 case EVP_CIPH_GCM_MODE:
112 ret = evp_cipher_set_asn1_aead_params(c, type, asn1_params);
115 case EVP_CIPH_CCM_MODE:
116 case EVP_CIPH_XTS_MODE:
117 case EVP_CIPH_OCB_MODE:
122 ret = EVP_CIPHER_set_asn1_iv(c, type);
124 } else if (cipher->prov != NULL) {
125 OSSL_PARAM params[3], *p = params;
126 unsigned char *der = NULL, *derp;
129 * We make two passes, the first to get the appropriate buffer size,
130 * and the second to get the actual value.
132 *p++ = OSSL_PARAM_construct_octet_string(
133 OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS,
135 *p = OSSL_PARAM_construct_end();
137 if (!EVP_CIPHER_CTX_get_params(c, params))
140 /* ... but, we should get a return size too! */
141 if (OSSL_PARAM_modified(params)
142 && params[0].return_size != 0
143 && (der = OPENSSL_malloc(params[0].return_size)) != NULL) {
144 params[0].data = der;
145 params[0].data_size = params[0].return_size;
146 OSSL_PARAM_set_all_unmodified(params);
148 if (EVP_CIPHER_CTX_get_params(c, params)
149 && OSSL_PARAM_modified(params)
150 && d2i_ASN1_TYPE(&type, (const unsigned char **)&derp,
151 params[0].return_size) != NULL) {
162 ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_CIPHER);
164 ERR_raise(ERR_LIB_EVP, EVP_R_CIPHER_PARAMETER_ERROR);
170 int evp_cipher_asn1_to_param_ex(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
171 evp_cipher_aead_asn1_params *asn1_params)
173 int ret = -1; /* Assume the worst */
174 const EVP_CIPHER *cipher = c->cipher;
177 * For legacy implementations, we detect custom AlgorithmIdentifier
178 * parameter handling by checking if there the function pointer
179 * cipher->get_asn1_parameters is set. We know that this pointer
180 * is NULL for provided implementations.
182 * Otherwise, for any implementation, we check the flag
183 * EVP_CIPH_FLAG_CUSTOM_ASN1. If it isn't set, we apply
184 * default AI parameter creation.
186 * Otherwise, for provided implementations, we get the AI parameter
187 * in DER encoded form from the implementation by requesting the
188 * appropriate OSSL_PARAM and converting the result to a ASN1_TYPE.
190 * If none of the above applies, this operation is unsupported.
192 if (cipher->get_asn1_parameters != NULL) {
193 ret = cipher->get_asn1_parameters(c, type);
194 } else if ((EVP_CIPHER_get_flags(cipher) & EVP_CIPH_FLAG_CUSTOM_ASN1) == 0) {
195 switch (EVP_CIPHER_get_mode(cipher)) {
196 case EVP_CIPH_WRAP_MODE:
200 case EVP_CIPH_GCM_MODE:
201 ret = evp_cipher_get_asn1_aead_params(c, type, asn1_params);
204 case EVP_CIPH_CCM_MODE:
205 case EVP_CIPH_XTS_MODE:
206 case EVP_CIPH_OCB_MODE:
211 ret = EVP_CIPHER_get_asn1_iv(c, type);
213 } else if (cipher->prov != NULL) {
214 OSSL_PARAM params[3], *p = params;
215 unsigned char *der = NULL;
218 if ((derl = i2d_ASN1_TYPE(type, &der)) >= 0) {
220 OSSL_PARAM_construct_octet_string(
221 OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS,
223 *p = OSSL_PARAM_construct_end();
224 if (EVP_CIPHER_CTX_set_params(c, params))
233 ERR_raise(ERR_LIB_EVP, EVP_R_UNSUPPORTED_CIPHER);
235 ERR_raise(ERR_LIB_EVP, EVP_R_CIPHER_PARAMETER_ERROR);
241 int evp_cipher_get_asn1_aead_params(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
242 evp_cipher_aead_asn1_params *asn1_params)
246 unsigned char iv[EVP_MAX_IV_LENGTH];
248 if (type == NULL || asn1_params == NULL)
251 i = ossl_asn1_type_get_octetstring_int(type, &tl, NULL, EVP_MAX_IV_LENGTH);
254 ossl_asn1_type_get_octetstring_int(type, &tl, iv, i);
256 memcpy(asn1_params->iv, iv, i);
257 asn1_params->iv_len = i;
262 int evp_cipher_set_asn1_aead_params(EVP_CIPHER_CTX *c, ASN1_TYPE *type,
263 evp_cipher_aead_asn1_params *asn1_params)
265 if (type == NULL || asn1_params == NULL)
268 return ossl_asn1_type_set_octetstring_int(type, asn1_params->tag_len,
270 asn1_params->iv_len);
272 #endif /* !defined(FIPS_MODULE) */
274 /* Convert the various cipher NIDs and dummies to a proper OID NID */
275 int EVP_CIPHER_get_type(const EVP_CIPHER *cipher)
278 nid = EVP_CIPHER_get_nid(cipher);
293 case NID_aes_128_cfb128:
294 case NID_aes_128_cfb8:
295 case NID_aes_128_cfb1:
297 return NID_aes_128_cfb128;
299 case NID_aes_192_cfb128:
300 case NID_aes_192_cfb8:
301 case NID_aes_192_cfb1:
303 return NID_aes_192_cfb128;
305 case NID_aes_256_cfb128:
306 case NID_aes_256_cfb8:
307 case NID_aes_256_cfb1:
309 return NID_aes_256_cfb128;
315 return NID_des_cfb64;
317 case NID_des_ede3_cfb64:
318 case NID_des_ede3_cfb8:
319 case NID_des_ede3_cfb1:
321 return NID_des_cfb64;
328 /* Check it has an OID and it is valid */
329 ASN1_OBJECT *otmp = OBJ_nid2obj(nid);
331 if (OBJ_get0_data(otmp) == NULL)
333 ASN1_OBJECT_free(otmp);
340 int evp_cipher_cache_constants(EVP_CIPHER *cipher)
342 int ok, aead = 0, custom_iv = 0, cts = 0, multiblock = 0, randkey = 0;
346 unsigned int mode = 0;
347 OSSL_PARAM params[10];
349 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_BLOCK_SIZE, &blksz);
350 params[1] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &ivlen);
351 params[2] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &keylen);
352 params[3] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_MODE, &mode);
353 params[4] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_AEAD, &aead);
354 params[5] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_CUSTOM_IV,
356 params[6] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_CTS, &cts);
357 params[7] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_TLS1_MULTIBLOCK,
359 params[8] = OSSL_PARAM_construct_int(OSSL_CIPHER_PARAM_HAS_RAND_KEY,
361 params[9] = OSSL_PARAM_construct_end();
362 ok = evp_do_ciph_getparams(cipher, params) > 0;
364 cipher->block_size = blksz;
365 cipher->iv_len = ivlen;
366 cipher->key_len = keylen;
367 cipher->flags = mode;
369 cipher->flags |= EVP_CIPH_FLAG_AEAD_CIPHER;
371 cipher->flags |= EVP_CIPH_CUSTOM_IV;
373 cipher->flags |= EVP_CIPH_FLAG_CTS;
375 cipher->flags |= EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK;
376 if (cipher->ccipher != NULL)
377 cipher->flags |= EVP_CIPH_FLAG_CUSTOM_CIPHER;
379 cipher->flags |= EVP_CIPH_RAND_KEY;
380 if (OSSL_PARAM_locate_const(EVP_CIPHER_gettable_ctx_params(cipher),
381 OSSL_CIPHER_PARAM_ALGORITHM_ID_PARAMS))
382 cipher->flags |= EVP_CIPH_FLAG_CUSTOM_ASN1;
387 int EVP_CIPHER_get_block_size(const EVP_CIPHER *cipher)
389 return cipher->block_size;
392 int EVP_CIPHER_CTX_get_block_size(const EVP_CIPHER_CTX *ctx)
394 return EVP_CIPHER_get_block_size(ctx->cipher);
397 int EVP_CIPHER_impl_ctx_size(const EVP_CIPHER *e)
402 int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
403 const unsigned char *in, unsigned int inl)
405 if (ctx->cipher->prov != NULL) {
407 * If the provided implementation has a ccipher function, we use it,
408 * and translate its return value like this: 0 => -1, 1 => outlen
410 * Otherwise, we call the cupdate function if in != NULL, or cfinal
411 * if in == NULL. Regardless of which, we return what we got.
415 size_t blocksize = EVP_CIPHER_CTX_get_block_size(ctx);
417 if (ctx->cipher->ccipher != NULL)
418 ret = ctx->cipher->ccipher(ctx->algctx, out, &outl,
419 inl + (blocksize == 1 ? 0 : blocksize),
423 ret = ctx->cipher->cupdate(ctx->algctx, out, &outl,
424 inl + (blocksize == 1 ? 0 : blocksize),
427 ret = ctx->cipher->cfinal(ctx->algctx, out, &outl,
428 blocksize == 1 ? 0 : blocksize);
433 return ctx->cipher->do_cipher(ctx, out, in, inl);
436 #ifndef OPENSSL_NO_DEPRECATED_3_0
437 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
445 const EVP_CIPHER *EVP_CIPHER_CTX_get0_cipher(const EVP_CIPHER_CTX *ctx)
452 EVP_CIPHER *EVP_CIPHER_CTX_get1_cipher(EVP_CIPHER_CTX *ctx)
458 cipher = (EVP_CIPHER *)ctx->cipher;
459 if (!EVP_CIPHER_up_ref(cipher))
464 int EVP_CIPHER_CTX_is_encrypting(const EVP_CIPHER_CTX *ctx)
469 unsigned long EVP_CIPHER_get_flags(const EVP_CIPHER *cipher)
471 return cipher->flags;
474 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
476 return ctx->app_data;
479 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
481 ctx->app_data = data;
484 void *EVP_CIPHER_CTX_get_cipher_data(const EVP_CIPHER_CTX *ctx)
486 return ctx->cipher_data;
489 void *EVP_CIPHER_CTX_set_cipher_data(EVP_CIPHER_CTX *ctx, void *cipher_data)
491 void *old_cipher_data;
493 old_cipher_data = ctx->cipher_data;
494 ctx->cipher_data = cipher_data;
496 return old_cipher_data;
499 int EVP_CIPHER_get_iv_length(const EVP_CIPHER *cipher)
501 return cipher->iv_len;
504 int EVP_CIPHER_CTX_get_iv_length(const EVP_CIPHER_CTX *ctx)
506 if (ctx->iv_len < 0) {
507 int rv, len = EVP_CIPHER_get_iv_length(ctx->cipher);
509 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
511 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &v);
512 rv = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
513 if (rv != EVP_CTRL_RET_UNSUPPORTED) {
518 /* Code below to be removed when legacy support is dropped. */
519 else if ((EVP_CIPHER_get_flags(ctx->cipher)
520 & EVP_CIPH_CUSTOM_IV_LENGTH) != 0) {
521 rv = EVP_CIPHER_CTX_ctrl((EVP_CIPHER_CTX *)ctx, EVP_CTRL_GET_IVLEN,
527 * Casting away the const is annoying but required here. We need to
528 * cache the result for performance reasons.
530 ((EVP_CIPHER_CTX *)ctx)->iv_len = len;
535 int EVP_CIPHER_CTX_get_tag_length(const EVP_CIPHER_CTX *ctx)
539 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
541 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TAGLEN, &v);
542 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
543 return ret == 1 ? (int)v : 0;
546 #ifndef OPENSSL_NO_DEPRECATED_3_0
547 const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx)
550 const unsigned char *v = ctx->oiv;
551 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
554 OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_IV,
555 (void **)&v, sizeof(ctx->oiv));
556 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
558 return ok != 0 ? v : NULL;
562 * OSSL_PARAM_OCTET_PTR gets us the pointer to the running IV in the provider
564 const unsigned char *EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX *ctx)
567 const unsigned char *v = ctx->iv;
568 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
571 OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_UPDATED_IV,
572 (void **)&v, sizeof(ctx->iv));
573 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
575 return ok != 0 ? v : NULL;
578 unsigned char *EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX *ctx)
581 unsigned char *v = ctx->iv;
582 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
585 OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_UPDATED_IV,
586 (void **)&v, sizeof(ctx->iv));
587 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
589 return ok != 0 ? v : NULL;
591 #endif /* OPENSSL_NO_DEPRECATED_3_0_0 */
593 int EVP_CIPHER_CTX_get_updated_iv(EVP_CIPHER_CTX *ctx, void *buf, size_t len)
595 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
598 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_UPDATED_IV, buf, len);
599 return evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
602 int EVP_CIPHER_CTX_get_original_iv(EVP_CIPHER_CTX *ctx, void *buf, size_t len)
604 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
607 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_IV, buf, len);
608 return evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
611 unsigned char *EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX *ctx)
616 int EVP_CIPHER_CTX_get_num(const EVP_CIPHER_CTX *ctx)
619 unsigned int v = (unsigned int)ctx->num;
620 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
622 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_NUM, &v);
623 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
625 return ok != 0 ? (int)v : EVP_CTRL_RET_UNSUPPORTED;
628 int EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num)
631 unsigned int n = (unsigned int)num;
632 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
634 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_NUM, &n);
635 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->algctx, params);
642 int EVP_CIPHER_get_key_length(const EVP_CIPHER *cipher)
644 return cipher->key_len;
647 int EVP_CIPHER_CTX_get_key_length(const EVP_CIPHER_CTX *ctx)
649 if (ctx->key_len <= 0 && ctx->cipher->prov != NULL) {
651 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
654 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &len);
655 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->algctx, params);
657 return EVP_CTRL_RET_UNSUPPORTED;
660 * The if branch should never be taken since EVP_MAX_KEY_LENGTH is
661 * less than INT_MAX but best to be safe.
663 * Casting away the const is annoying but required here. We need to
664 * cache the result for performance reasons.
666 if (!OSSL_PARAM_get_int(params, &((EVP_CIPHER_CTX *)ctx)->key_len))
668 ((EVP_CIPHER_CTX *)ctx)->key_len = (int)len;
673 int EVP_CIPHER_get_nid(const EVP_CIPHER *cipher)
678 int EVP_CIPHER_CTX_get_nid(const EVP_CIPHER_CTX *ctx)
680 return ctx->cipher->nid;
683 int EVP_CIPHER_is_a(const EVP_CIPHER *cipher, const char *name)
685 if (cipher->prov != NULL)
686 return evp_is_a(cipher->prov, cipher->name_id, NULL, name);
687 return evp_is_a(NULL, 0, EVP_CIPHER_get0_name(cipher), name);
690 int evp_cipher_get_number(const EVP_CIPHER *cipher)
692 return cipher->name_id;
695 const char *EVP_CIPHER_get0_name(const EVP_CIPHER *cipher)
697 if (cipher->type_name != NULL)
698 return cipher->type_name;
700 return OBJ_nid2sn(EVP_CIPHER_get_nid(cipher));
706 const char *EVP_CIPHER_get0_description(const EVP_CIPHER *cipher)
708 if (cipher->description != NULL)
709 return cipher->description;
711 return OBJ_nid2ln(EVP_CIPHER_get_nid(cipher));
717 int EVP_CIPHER_names_do_all(const EVP_CIPHER *cipher,
718 void (*fn)(const char *name, void *data),
721 if (cipher->prov != NULL)
722 return evp_names_do_all(cipher->prov, cipher->name_id, fn, data);
727 const OSSL_PROVIDER *EVP_CIPHER_get0_provider(const EVP_CIPHER *cipher)
732 int EVP_CIPHER_get_mode(const EVP_CIPHER *cipher)
734 return EVP_CIPHER_get_flags(cipher) & EVP_CIPH_MODE;
737 int EVP_MD_is_a(const EVP_MD *md, const char *name)
739 if (md->prov != NULL)
740 return evp_is_a(md->prov, md->name_id, NULL, name);
741 return evp_is_a(NULL, 0, EVP_MD_get0_name(md), name);
744 int evp_md_get_number(const EVP_MD *md)
749 const char *EVP_MD_get0_description(const EVP_MD *md)
751 if (md->description != NULL)
752 return md->description;
754 return OBJ_nid2ln(EVP_MD_nid(md));
760 const char *EVP_MD_get0_name(const EVP_MD *md)
764 if (md->type_name != NULL)
765 return md->type_name;
767 return OBJ_nid2sn(EVP_MD_nid(md));
773 int EVP_MD_names_do_all(const EVP_MD *md,
774 void (*fn)(const char *name, void *data),
777 if (md->prov != NULL)
778 return evp_names_do_all(md->prov, md->name_id, fn, data);
783 const OSSL_PROVIDER *EVP_MD_get0_provider(const EVP_MD *md)
788 int EVP_MD_get_type(const EVP_MD *md)
793 int EVP_MD_get_pkey_type(const EVP_MD *md)
795 return md->pkey_type;
798 int EVP_MD_get_block_size(const EVP_MD *md)
801 ERR_raise(ERR_LIB_EVP, EVP_R_MESSAGE_DIGEST_IS_NULL);
804 return md->block_size;
807 int EVP_MD_get_size(const EVP_MD *md)
810 ERR_raise(ERR_LIB_EVP, EVP_R_MESSAGE_DIGEST_IS_NULL);
816 unsigned long EVP_MD_get_flags(const EVP_MD *md)
821 EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type)
823 EVP_MD *md = evp_md_new();
827 md->pkey_type = pkey_type;
828 md->origin = EVP_ORIG_METH;
833 EVP_MD *EVP_MD_meth_dup(const EVP_MD *md)
838 * Non-legacy EVP_MDs can't be duplicated like this.
839 * Use EVP_MD_up_ref() instead.
841 if (md->prov != NULL)
844 if ((to = EVP_MD_meth_new(md->type, md->pkey_type)) != NULL) {
845 CRYPTO_RWLOCK *lock = to->lock;
847 memcpy(to, md, sizeof(*to));
849 to->origin = EVP_ORIG_METH;
854 void evp_md_free_int(EVP_MD *md)
856 OPENSSL_free(md->type_name);
857 ossl_provider_free(md->prov);
858 CRYPTO_THREAD_lock_free(md->lock);
862 void EVP_MD_meth_free(EVP_MD *md)
864 if (md == NULL || md->origin != EVP_ORIG_METH)
870 int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize)
872 if (md->block_size != 0)
875 md->block_size = blocksize;
878 int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize)
880 if (md->md_size != 0)
883 md->md_size = resultsize;
886 int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize)
888 if (md->ctx_size != 0)
891 md->ctx_size = datasize;
894 int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags)
902 int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx))
904 if (md->init != NULL)
910 int EVP_MD_meth_set_update(EVP_MD *md, int (*update)(EVP_MD_CTX *ctx,
914 if (md->update != NULL)
920 int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx,
923 if (md->final != NULL)
929 int EVP_MD_meth_set_copy(EVP_MD *md, int (*copy)(EVP_MD_CTX *to,
930 const EVP_MD_CTX *from))
932 if (md->copy != NULL)
938 int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx))
940 if (md->cleanup != NULL)
943 md->cleanup = cleanup;
946 int EVP_MD_meth_set_ctrl(EVP_MD *md, int (*ctrl)(EVP_MD_CTX *ctx, int cmd,
949 if (md->md_ctrl != NULL)
956 int EVP_MD_meth_get_input_blocksize(const EVP_MD *md)
958 return md->block_size;
960 int EVP_MD_meth_get_result_size(const EVP_MD *md)
964 int EVP_MD_meth_get_app_datasize(const EVP_MD *md)
968 unsigned long EVP_MD_meth_get_flags(const EVP_MD *md)
972 int (*EVP_MD_meth_get_init(const EVP_MD *md))(EVP_MD_CTX *ctx)
976 int (*EVP_MD_meth_get_update(const EVP_MD *md))(EVP_MD_CTX *ctx,
982 int (*EVP_MD_meth_get_final(const EVP_MD *md))(EVP_MD_CTX *ctx,
987 int (*EVP_MD_meth_get_copy(const EVP_MD *md))(EVP_MD_CTX *to,
988 const EVP_MD_CTX *from)
992 int (*EVP_MD_meth_get_cleanup(const EVP_MD *md))(EVP_MD_CTX *ctx)
996 int (*EVP_MD_meth_get_ctrl(const EVP_MD *md))(EVP_MD_CTX *ctx, int cmd,
1002 #ifndef OPENSSL_NO_DEPRECATED_3_0
1003 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
1007 return ctx->reqdigest;
1011 const EVP_MD *EVP_MD_CTX_get0_md(const EVP_MD_CTX *ctx)
1015 return ctx->reqdigest;
1018 EVP_MD *EVP_MD_CTX_get1_md(EVP_MD_CTX *ctx)
1024 md = (EVP_MD *)ctx->reqdigest;
1025 if (md == NULL || !EVP_MD_up_ref(md))
1030 EVP_PKEY_CTX *EVP_MD_CTX_get_pkey_ctx(const EVP_MD_CTX *ctx)
1035 #if !defined(FIPS_MODULE)
1036 void EVP_MD_CTX_set_pkey_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pctx)
1039 * it's reasonable to set NULL pctx (a.k.a clear the ctx->pctx), so
1040 * we have to deal with the cleanup job here.
1042 if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX))
1043 EVP_PKEY_CTX_free(ctx->pctx);
1048 /* make sure pctx is not freed when destroying EVP_MD_CTX */
1049 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
1051 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
1054 #endif /* !defined(FIPS_MODULE) */
1056 void *EVP_MD_CTX_get0_md_data(const EVP_MD_CTX *ctx)
1058 return ctx->md_data;
1061 int (*EVP_MD_CTX_update_fn(EVP_MD_CTX *ctx))(EVP_MD_CTX *ctx,
1062 const void *data, size_t count)
1067 void EVP_MD_CTX_set_update_fn(EVP_MD_CTX *ctx,
1068 int (*update) (EVP_MD_CTX *ctx,
1069 const void *data, size_t count))
1071 ctx->update = update;
1074 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
1076 ctx->flags |= flags;
1079 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
1081 ctx->flags &= ~flags;
1084 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
1086 return (ctx->flags & flags);
1089 static int evp_cipher_ctx_enable_use_bits(EVP_CIPHER_CTX *ctx,
1090 unsigned int enable)
1092 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END };
1094 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_USE_BITS, &enable);
1095 return EVP_CIPHER_CTX_set_params(ctx, params);
1098 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
1100 int oldflags = ctx->flags;
1102 ctx->flags |= flags;
1103 if (((oldflags ^ ctx->flags) & EVP_CIPH_FLAG_LENGTH_BITS) != 0)
1104 evp_cipher_ctx_enable_use_bits(ctx, 1);
1107 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
1109 int oldflags = ctx->flags;
1111 ctx->flags &= ~flags;
1112 if (((oldflags ^ ctx->flags) & EVP_CIPH_FLAG_LENGTH_BITS) != 0)
1113 evp_cipher_ctx_enable_use_bits(ctx, 0);
1116 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
1118 return (ctx->flags & flags);
1121 int EVP_PKEY_CTX_set_group_name(EVP_PKEY_CTX *ctx, const char *name)
1123 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END };
1125 if (ctx == NULL || !EVP_PKEY_CTX_IS_GEN_OP(ctx)) {
1126 ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1127 /* Uses the same return values as EVP_PKEY_CTX_ctrl */
1134 params[0] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
1136 return EVP_PKEY_CTX_set_params(ctx, params);
1139 int EVP_PKEY_CTX_get_group_name(EVP_PKEY_CTX *ctx, char *name, size_t namelen)
1141 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END };
1142 OSSL_PARAM *p = params;
1144 if (ctx == NULL || !EVP_PKEY_CTX_IS_GEN_OP(ctx)) {
1145 /* There is no legacy support for this */
1146 ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1147 /* Uses the same return values as EVP_PKEY_CTX_ctrl */
1154 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
1156 if (!EVP_PKEY_CTX_get_params(ctx, params))
1162 * evp_pkey_keygen() abstracts from the explicit use of B<EVP_PKEY_CTX>
1163 * while providing a generic way of generating a new asymmetric key pair
1164 * of algorithm type I<name> (e.g., C<RSA> or C<EC>).
1165 * The library context I<libctx> and property query I<propq>
1166 * are used when fetching algorithms from providers.
1167 * The I<params> specify algorithm-specific parameters
1168 * such as the RSA modulus size or the name of an EC curve.
1170 static EVP_PKEY *evp_pkey_keygen(OSSL_LIB_CTX *libctx, const char *name,
1171 const char *propq, const OSSL_PARAM *params)
1173 EVP_PKEY *pkey = NULL;
1174 EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new_from_name(libctx, name, propq);
1177 && EVP_PKEY_keygen_init(ctx) > 0
1178 && EVP_PKEY_CTX_set_params(ctx, params))
1179 (void)EVP_PKEY_generate(ctx, &pkey);
1181 EVP_PKEY_CTX_free(ctx);
1185 EVP_PKEY *EVP_PKEY_Q_keygen(OSSL_LIB_CTX *libctx, const char *propq,
1186 const char *type, ...)
1191 OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END };
1192 EVP_PKEY *ret = NULL;
1194 va_start(args, type);
1196 if (OPENSSL_strcasecmp(type, "RSA") == 0) {
1197 bits = va_arg(args, size_t);
1198 params[0] = OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_RSA_BITS, &bits);
1199 } else if (OPENSSL_strcasecmp(type, "EC") == 0) {
1200 name = va_arg(args, char *);
1201 params[0] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
1203 } else if (OPENSSL_strcasecmp(type, "ED25519") != 0
1204 && OPENSSL_strcasecmp(type, "X25519") != 0
1205 && OPENSSL_strcasecmp(type, "ED448") != 0
1206 && OPENSSL_strcasecmp(type, "X448") != 0) {
1207 ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_INVALID_ARGUMENT);
1210 ret = evp_pkey_keygen(libctx, type, propq, params);