2 * Copyright 1995-2018 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 #include "internal/cryptlib.h"
12 #include <openssl/evp.h>
13 #include <openssl/objects.h>
14 #include <openssl/params.h>
15 #include <openssl/core_names.h>
16 #include <openssl/dh.h>
17 #include "crypto/evp.h"
18 #include "internal/provider.h"
19 #include "evp_local.h"
21 #if !defined(FIPS_MODE)
22 int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
24 int ret = -1; /* Assume the worst */
25 const EVP_CIPHER *cipher = c->cipher;
28 * For legacy implementations, we detect custom AlgorithmIdentifier
29 * parameter handling by checking if the function pointer
30 * cipher->set_asn1_parameters is set. We know that this pointer
31 * is NULL for provided implementations.
33 * Otherwise, for any implementation, we check the flag
34 * EVP_CIPH_FLAG_CUSTOM_ASN1. If it isn't set, we apply
35 * default AI parameter extraction.
37 * Otherwise, for provided implementations, we convert |type| to
38 * a DER encoded blob and pass to the implementation in OSSL_PARAM
41 * If none of the above applies, this operation is unsupported.
43 if (cipher->set_asn1_parameters != NULL) {
44 ret = cipher->set_asn1_parameters(c, type);
45 } else if ((EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_CUSTOM_ASN1) == 0) {
46 switch (EVP_CIPHER_mode(cipher)) {
47 case EVP_CIPH_WRAP_MODE:
48 if (EVP_CIPHER_is_a(cipher, SN_id_smime_alg_CMS3DESwrap))
49 ASN1_TYPE_set(type, V_ASN1_NULL, NULL);
53 case EVP_CIPH_GCM_MODE:
54 case EVP_CIPH_CCM_MODE:
55 case EVP_CIPH_XTS_MODE:
56 case EVP_CIPH_OCB_MODE:
61 ret = EVP_CIPHER_set_asn1_iv(c, type);
63 } else if (cipher->prov != NULL) {
64 OSSL_PARAM params[3], *p = params;
65 unsigned char *der = NULL, *derp;
68 * We make two passes, the first to get the appropriate buffer size,
69 * and the second to get the actual value.
71 *p++ = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_ALG_ID,
73 *p = OSSL_PARAM_construct_end();
75 if (!EVP_CIPHER_CTX_get_params(c, params))
78 /* ... but, we should get a return size too! */
79 if (params[0].return_size != 0
80 && (der = OPENSSL_malloc(params[0].return_size)) != NULL) {
82 params[0].data_size = params[0].return_size;
83 params[0].return_size = 0;
85 if (EVP_CIPHER_CTX_get_params(c, params)
86 && d2i_ASN1_TYPE(&type, (const unsigned char **)&derp,
87 params[0].return_size) != NULL) {
98 EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, ASN1_R_UNSUPPORTED_CIPHER);
100 EVPerr(EVP_F_EVP_CIPHER_PARAM_TO_ASN1, EVP_R_CIPHER_PARAMETER_ERROR);
106 int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
108 int ret = -1; /* Assume the worst */
109 const EVP_CIPHER *cipher = c->cipher;
112 * For legacy implementations, we detect custom AlgorithmIdentifier
113 * parameter handling by checking if there the function pointer
114 * cipher->get_asn1_parameters is set. We know that this pointer
115 * is NULL for provided implementations.
117 * Otherwise, for any implementation, we check the flag
118 * EVP_CIPH_FLAG_CUSTOM_ASN1. If it isn't set, we apply
119 * default AI parameter creation.
121 * Otherwise, for provided implementations, we get the AI parameter
122 * in DER encoded form from the implementation by requesting the
123 * appropriate OSSL_PARAM and converting the result to a ASN1_TYPE.
125 * If none of the above applies, this operation is unsupported.
127 if (cipher->get_asn1_parameters != NULL) {
128 ret = cipher->get_asn1_parameters(c, type);
129 } else if ((EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_CUSTOM_ASN1) == 0) {
130 switch (EVP_CIPHER_mode(cipher)) {
131 case EVP_CIPH_WRAP_MODE:
135 case EVP_CIPH_GCM_MODE:
136 case EVP_CIPH_CCM_MODE:
137 case EVP_CIPH_XTS_MODE:
138 case EVP_CIPH_OCB_MODE:
143 ret = EVP_CIPHER_get_asn1_iv(c, type);
145 } else if (cipher->prov != NULL) {
146 OSSL_PARAM params[3], *p = params;
147 unsigned char *der = NULL;
150 if ((derl = i2d_ASN1_TYPE(type, &der)) >= 0) {
152 OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_ALG_ID,
154 *p = OSSL_PARAM_construct_end();
155 if (EVP_CIPHER_CTX_set_params(c, params))
164 EVPerr(EVP_F_EVP_CIPHER_ASN1_TO_PARAM, EVP_R_UNSUPPORTED_CIPHER);
166 EVPerr(EVP_F_EVP_CIPHER_ASN1_TO_PARAM, EVP_R_CIPHER_PARAMETER_ERROR);
172 int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *ctx, ASN1_TYPE *type)
178 unsigned char iv[EVP_MAX_IV_LENGTH];
180 l = EVP_CIPHER_CTX_iv_length(ctx);
181 if (!ossl_assert(l <= sizeof(iv)))
183 i = ASN1_TYPE_get_octetstring(type, iv, l);
187 if (!EVP_CipherInit_ex(ctx, NULL, NULL, NULL, iv, -1))
193 int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type)
197 unsigned char *oiv = NULL;
200 oiv = (unsigned char *)EVP_CIPHER_CTX_original_iv(c);
201 j = EVP_CIPHER_CTX_iv_length(c);
202 OPENSSL_assert(j <= sizeof(c->iv));
203 i = ASN1_TYPE_set_octetstring(type, oiv, j);
207 #endif /* !defined(FIPS_MODE) */
209 /* Convert the various cipher NIDs and dummies to a proper OID NID */
210 int EVP_CIPHER_type(const EVP_CIPHER *ctx)
213 nid = EVP_CIPHER_nid(ctx);
228 case NID_aes_128_cfb128:
229 case NID_aes_128_cfb8:
230 case NID_aes_128_cfb1:
232 return NID_aes_128_cfb128;
234 case NID_aes_192_cfb128:
235 case NID_aes_192_cfb8:
236 case NID_aes_192_cfb1:
238 return NID_aes_192_cfb128;
240 case NID_aes_256_cfb128:
241 case NID_aes_256_cfb8:
242 case NID_aes_256_cfb1:
244 return NID_aes_256_cfb128;
250 return NID_des_cfb64;
252 case NID_des_ede3_cfb64:
253 case NID_des_ede3_cfb8:
254 case NID_des_ede3_cfb1:
256 return NID_des_cfb64;
263 /* Check it has an OID and it is valid */
264 ASN1_OBJECT *otmp = OBJ_nid2obj(nid);
266 if (OBJ_get0_data(otmp) == NULL)
268 ASN1_OBJECT_free(otmp);
275 int evp_cipher_cache_constants(EVP_CIPHER *cipher)
281 unsigned int mode = 0;
282 unsigned long flags = 0;
283 OSSL_PARAM params[6];
285 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_BLOCK_SIZE, &blksz);
286 params[1] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &ivlen);
287 params[2] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &keylen);
288 params[3] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_MODE, &mode);
289 params[4] = OSSL_PARAM_construct_ulong(OSSL_CIPHER_PARAM_FLAGS, &flags);
290 params[5] = OSSL_PARAM_construct_end();
291 ok = evp_do_ciph_getparams(cipher, params);
293 /* Provided implementations may have a custom cipher_cipher */
294 if (cipher->prov != NULL && cipher->ccipher != NULL)
295 flags |= EVP_CIPH_FLAG_CUSTOM_CIPHER;
296 cipher->block_size = blksz;
297 cipher->iv_len = ivlen;
298 cipher->key_len = keylen;
299 cipher->flags = flags | mode;
304 int EVP_CIPHER_block_size(const EVP_CIPHER *cipher)
306 return cipher->block_size;
309 int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx)
311 return EVP_CIPHER_block_size(ctx->cipher);
314 int EVP_CIPHER_impl_ctx_size(const EVP_CIPHER *e)
319 int EVP_Cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
320 const unsigned char *in, unsigned int inl)
322 if (ctx->cipher->prov != NULL) {
324 * If the provided implementation has a ccipher function, we use it,
325 * and translate its return value like this: 0 => -1, 1 => outlen
327 * Otherwise, we call the cupdate function if in != NULL, or cfinal
328 * if in == NULL. Regardless of which, we return what we got.
332 size_t blocksize = EVP_CIPHER_CTX_block_size(ctx);
334 if (ctx->cipher->ccipher != NULL)
335 ret = ctx->cipher->ccipher(ctx->provctx, out, &outl,
336 inl + (blocksize == 1 ? 0 : blocksize),
340 ret = ctx->cipher->cupdate(ctx->provctx, out, &outl,
341 inl + (blocksize == 1 ? 0 : blocksize),
344 ret = ctx->cipher->cfinal(ctx->provctx, out, &outl,
345 blocksize == 1 ? 0 : blocksize);
350 return ctx->cipher->do_cipher(ctx, out, in, inl);
353 const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx)
358 int EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx)
363 unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher)
365 return cipher->flags;
368 void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx)
370 return ctx->app_data;
373 void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data)
375 ctx->app_data = data;
378 void *EVP_CIPHER_CTX_get_cipher_data(const EVP_CIPHER_CTX *ctx)
380 return ctx->cipher_data;
383 void *EVP_CIPHER_CTX_set_cipher_data(EVP_CIPHER_CTX *ctx, void *cipher_data)
385 void *old_cipher_data;
387 old_cipher_data = ctx->cipher_data;
388 ctx->cipher_data = cipher_data;
390 return old_cipher_data;
393 int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher)
395 return cipher->iv_len;
398 int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx)
400 int rv, len = EVP_CIPHER_iv_length(ctx->cipher);
402 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
404 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &v);
405 rv = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
406 if (rv == EVP_CTRL_RET_UNSUPPORTED)
408 return rv != 0 ? (int)v : -1;
409 /* TODO (3.0) Remove legacy support */
411 if ((EVP_CIPHER_flags(ctx->cipher) & EVP_CIPH_CUSTOM_IV_LENGTH) != 0) {
412 rv = EVP_CIPHER_CTX_ctrl((EVP_CIPHER_CTX *)ctx, EVP_CTRL_GET_IVLEN,
414 return (rv == 1) ? len : -1;
419 int EVP_CIPHER_CTX_tag_length(const EVP_CIPHER_CTX *ctx)
423 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
425 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_AEAD_TAGLEN, &v);
426 ret = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
427 return ret == 1 ? (int)v : 0;
430 const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx)
433 const unsigned char *v = ctx->oiv;
434 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
437 OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_IV,
438 (void **)&v, sizeof(ctx->oiv));
439 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
441 return ok != 0 ? v : NULL;
445 * OSSL_PARAM_OCTET_PTR gets us the pointer to the running IV in the provider
447 const unsigned char *EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX *ctx)
450 const unsigned char *v = ctx->iv;
451 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
454 OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_IV, (void **)&v,
456 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
458 return ok != 0 ? v : NULL;
461 unsigned char *EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX *ctx)
464 unsigned char *v = ctx->iv;
465 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
468 OSSL_PARAM_construct_octet_ptr(OSSL_CIPHER_PARAM_IV, (void **)&v,
470 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
472 return ok != 0 ? v : NULL;
475 unsigned char *EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX *ctx)
480 int EVP_CIPHER_CTX_num(const EVP_CIPHER_CTX *ctx)
483 unsigned int v = (unsigned int)ctx->num;
484 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
486 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_NUM, &v);
487 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
489 return ok != 0 ? (int)v : EVP_CTRL_RET_UNSUPPORTED;
492 int EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num)
495 unsigned int n = (unsigned int)num;
496 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
498 params[0] = OSSL_PARAM_construct_uint(OSSL_CIPHER_PARAM_NUM, &n);
499 ok = evp_do_ciph_ctx_setparams(ctx->cipher, ctx->provctx, params);
506 int EVP_CIPHER_key_length(const EVP_CIPHER *cipher)
508 return cipher->key_len;
511 int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx)
514 size_t v = ctx->key_len;
515 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
517 params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_KEYLEN, &v);
518 ok = evp_do_ciph_ctx_getparams(ctx->cipher, ctx->provctx, params);
520 return ok != 0 ? (int)v : EVP_CTRL_RET_UNSUPPORTED;
523 int EVP_CIPHER_nid(const EVP_CIPHER *cipher)
528 int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx)
530 return ctx->cipher->nid;
533 int EVP_CIPHER_is_a(const EVP_CIPHER *cipher, const char *name)
535 if (cipher->prov != NULL)
536 return evp_is_a(cipher->prov, cipher->name_id, NULL, name);
537 return evp_is_a(NULL, 0, EVP_CIPHER_name(cipher), name);
540 int EVP_CIPHER_number(const EVP_CIPHER *cipher)
542 return cipher->name_id;
545 const char *EVP_CIPHER_name(const EVP_CIPHER *cipher)
547 if (cipher->prov != NULL)
548 return evp_first_name(cipher->prov, cipher->name_id);
550 return OBJ_nid2sn(EVP_CIPHER_nid(cipher));
556 void EVP_CIPHER_names_do_all(const EVP_CIPHER *cipher,
557 void (*fn)(const char *name, void *data),
560 if (cipher->prov != NULL)
561 evp_names_do_all(cipher->prov, cipher->name_id, fn, data);
564 const OSSL_PROVIDER *EVP_CIPHER_provider(const EVP_CIPHER *cipher)
569 int EVP_CIPHER_mode(const EVP_CIPHER *cipher)
571 return EVP_CIPHER_flags(cipher) & EVP_CIPH_MODE;
574 int EVP_MD_is_a(const EVP_MD *md, const char *name)
576 if (md->prov != NULL)
577 return evp_is_a(md->prov, md->name_id, NULL, name);
578 return evp_is_a(NULL, 0, EVP_MD_name(md), name);
581 int EVP_MD_number(const EVP_MD *md)
586 const char *EVP_MD_name(const EVP_MD *md)
588 if (md->prov != NULL)
589 return evp_first_name(md->prov, md->name_id);
591 return OBJ_nid2sn(EVP_MD_nid(md));
597 void EVP_MD_names_do_all(const EVP_MD *md,
598 void (*fn)(const char *name, void *data),
601 if (md->prov != NULL)
602 evp_names_do_all(md->prov, md->name_id, fn, data);
605 const OSSL_PROVIDER *EVP_MD_provider(const EVP_MD *md)
610 int EVP_MD_block_size(const EVP_MD *md)
613 size_t v = md->block_size;
614 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
617 EVPerr(EVP_F_EVP_MD_BLOCK_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
621 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_BLOCK_SIZE, &v);
622 ok = evp_do_md_getparams(md, params);
624 return ok != 0 ? (int)v : -1;
627 int EVP_MD_type(const EVP_MD *md)
632 int EVP_MD_pkey_type(const EVP_MD *md)
634 return md->pkey_type;
637 int EVP_MD_size(const EVP_MD *md)
640 size_t v = md->md_size;
641 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
644 EVPerr(EVP_F_EVP_MD_SIZE, EVP_R_MESSAGE_DIGEST_IS_NULL);
648 params[0] = OSSL_PARAM_construct_size_t(OSSL_DIGEST_PARAM_SIZE, &v);
649 ok = evp_do_md_getparams(md, params);
651 return ok != 0 ? (int)v : -1;
654 unsigned long EVP_MD_flags(const EVP_MD *md)
657 unsigned long v = md->flags;
658 OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END };
660 params[0] = OSSL_PARAM_construct_ulong(OSSL_CIPHER_PARAM_FLAGS, &v);
661 ok = evp_do_md_getparams(md, params);
663 return ok != 0 ? v : 0;
666 EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type)
668 EVP_MD *md = evp_md_new();
672 md->pkey_type = pkey_type;
677 EVP_MD *EVP_MD_meth_dup(const EVP_MD *md)
682 * Non-legacy EVP_MDs can't be duplicated like this.
683 * Use EVP_MD_up_ref() instead.
685 if (md->prov != NULL)
688 if ((to = EVP_MD_meth_new(md->type, md->pkey_type)) != NULL) {
689 CRYPTO_RWLOCK *lock = to->lock;
691 memcpy(to, md, sizeof(*to));
697 void EVP_MD_meth_free(EVP_MD *md)
701 int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize)
703 if (md->block_size != 0)
706 md->block_size = blocksize;
709 int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize)
711 if (md->md_size != 0)
714 md->md_size = resultsize;
717 int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize)
719 if (md->ctx_size != 0)
722 md->ctx_size = datasize;
725 int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags)
733 int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx))
735 if (md->init != NULL)
741 int EVP_MD_meth_set_update(EVP_MD *md, int (*update)(EVP_MD_CTX *ctx,
745 if (md->update != NULL)
751 int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx,
754 if (md->final != NULL)
760 int EVP_MD_meth_set_copy(EVP_MD *md, int (*copy)(EVP_MD_CTX *to,
761 const EVP_MD_CTX *from))
763 if (md->copy != NULL)
769 int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx))
771 if (md->cleanup != NULL)
774 md->cleanup = cleanup;
777 int EVP_MD_meth_set_ctrl(EVP_MD *md, int (*ctrl)(EVP_MD_CTX *ctx, int cmd,
780 if (md->md_ctrl != NULL)
787 int EVP_MD_meth_get_input_blocksize(const EVP_MD *md)
789 return md->block_size;
791 int EVP_MD_meth_get_result_size(const EVP_MD *md)
795 int EVP_MD_meth_get_app_datasize(const EVP_MD *md)
799 unsigned long EVP_MD_meth_get_flags(const EVP_MD *md)
803 int (*EVP_MD_meth_get_init(const EVP_MD *md))(EVP_MD_CTX *ctx)
807 int (*EVP_MD_meth_get_update(const EVP_MD *md))(EVP_MD_CTX *ctx,
813 int (*EVP_MD_meth_get_final(const EVP_MD *md))(EVP_MD_CTX *ctx,
818 int (*EVP_MD_meth_get_copy(const EVP_MD *md))(EVP_MD_CTX *to,
819 const EVP_MD_CTX *from)
823 int (*EVP_MD_meth_get_cleanup(const EVP_MD *md))(EVP_MD_CTX *ctx)
827 int (*EVP_MD_meth_get_ctrl(const EVP_MD *md))(EVP_MD_CTX *ctx, int cmd,
833 const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx)
837 return ctx->reqdigest;
840 EVP_PKEY_CTX *EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx)
845 #if !defined(FIPS_MODE)
846 /* TODO(3.0): EVP_DigestSign* not yet supported in FIPS module */
847 void EVP_MD_CTX_set_pkey_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pctx)
850 * it's reasonable to set NULL pctx (a.k.a clear the ctx->pctx), so
851 * we have to deal with the cleanup job here.
853 if (!EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX))
854 EVP_PKEY_CTX_free(ctx->pctx);
859 /* make sure pctx is not freed when destroying EVP_MD_CTX */
860 EVP_MD_CTX_set_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
862 EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_KEEP_PKEY_CTX);
865 #endif /* !defined(FIPS_MODE) */
867 void *EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx)
872 int (*EVP_MD_CTX_update_fn(EVP_MD_CTX *ctx))(EVP_MD_CTX *ctx,
873 const void *data, size_t count)
878 void EVP_MD_CTX_set_update_fn(EVP_MD_CTX *ctx,
879 int (*update) (EVP_MD_CTX *ctx,
880 const void *data, size_t count))
882 ctx->update = update;
885 void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags)
890 void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags)
892 ctx->flags &= ~flags;
895 int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags)
897 return (ctx->flags & flags);
900 void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags)
905 void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags)
907 ctx->flags &= ~flags;
910 int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags)
912 return (ctx->flags & flags);
915 int EVP_str2ctrl(int (*cb)(void *ctx, int cmd, void *buf, size_t buflen),
916 void *ctx, int cmd, const char *value)
923 return cb(ctx, cmd, (void *)value, len);
926 int EVP_hex2ctrl(int (*cb)(void *ctx, int cmd, void *buf, size_t buflen),
927 void *ctx, int cmd, const char *hex)
933 bin = OPENSSL_hexstr2buf(hex, &binlen);
936 if (binlen <= INT_MAX)
937 rv = cb(ctx, cmd, bin, binlen);