openssl/include/openssl/evp.h

/*
 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#ifndef OPENSSL_EVP_H
# define OPENSSL_EVP_H
# pragma once

# include <openssl/macros.h>
# if !OPENSSL_API_3
#  define HEADER_ENVELOPE_H
# endif

# include <stdarg.h>

# include <openssl/opensslconf.h>
# include <openssl/types.h>
# include <openssl/core.h>
# include <openssl/symhacks.h>
# include <openssl/bio.h>
# include <openssl/evperr.h>
# include <openssl/params.h>

# define EVP_MAX_MD_SIZE                 64/* longest known is SHA512 */
# define EVP_MAX_KEY_LENGTH              64
# define EVP_MAX_IV_LENGTH               16
# define EVP_MAX_BLOCK_LENGTH            32

# define PKCS5_SALT_LEN                  8
/* Default PKCS#5 iteration count */
# define PKCS5_DEFAULT_ITER              2048

# include <openssl/objects.h>

# define EVP_PK_RSA      0x0001
# define EVP_PK_DSA      0x0002
# define EVP_PK_DH       0x0004
# define EVP_PK_EC       0x0008
# define EVP_PKT_SIGN    0x0010
# define EVP_PKT_ENC     0x0020
# define EVP_PKT_EXCH    0x0040
# define EVP_PKS_RSA     0x0100
# define EVP_PKS_DSA     0x0200
# define EVP_PKS_EC      0x0400

# define EVP_PKEY_NONE   NID_undef
# define EVP_PKEY_RSA    NID_rsaEncryption
# define EVP_PKEY_RSA2   NID_rsa
# define EVP_PKEY_RSA_PSS NID_rsassaPss
# define EVP_PKEY_DSA    NID_dsa
# define EVP_PKEY_DSA1   NID_dsa_2
# define EVP_PKEY_DSA2   NID_dsaWithSHA
# define EVP_PKEY_DSA3   NID_dsaWithSHA1
# define EVP_PKEY_DSA4   NID_dsaWithSHA1_2
# define EVP_PKEY_DH     NID_dhKeyAgreement
# define EVP_PKEY_DHX    NID_dhpublicnumber
# define EVP_PKEY_EC     NID_X9_62_id_ecPublicKey
# define EVP_PKEY_SM2    NID_sm2
# define EVP_PKEY_HMAC   NID_hmac
# define EVP_PKEY_CMAC   NID_cmac
# define EVP_PKEY_SCRYPT NID_id_scrypt
# define EVP_PKEY_TLS1_PRF NID_tls1_prf
# define EVP_PKEY_HKDF   NID_hkdf
# define EVP_PKEY_POLY1305 NID_poly1305
# define EVP_PKEY_SIPHASH NID_siphash
# define EVP_PKEY_X25519 NID_X25519
# define EVP_PKEY_ED25519 NID_ED25519
# define EVP_PKEY_X448 NID_X448
# define EVP_PKEY_ED448 NID_ED448

#ifdef  __cplusplus
extern "C" {
#endif

int EVP_set_default_properties(OPENSSL_CTX *libctx, const char *propq);

# define EVP_PKEY_MO_SIGN        0x0001
# define EVP_PKEY_MO_VERIFY      0x0002
# define EVP_PKEY_MO_ENCRYPT     0x0004
# define EVP_PKEY_MO_DECRYPT     0x0008

# ifndef EVP_MD
EVP_MD *EVP_MD_meth_new(int md_type, int pkey_type);
EVP_MD *EVP_MD_meth_dup(const EVP_MD *md);
void EVP_MD_meth_free(EVP_MD *md);

int EVP_MD_meth_set_input_blocksize(EVP_MD *md, int blocksize);
int EVP_MD_meth_set_result_size(EVP_MD *md, int resultsize);
int EVP_MD_meth_set_app_datasize(EVP_MD *md, int datasize);
int EVP_MD_meth_set_flags(EVP_MD *md, unsigned long flags);
int EVP_MD_meth_set_init(EVP_MD *md, int (*init)(EVP_MD_CTX *ctx));
int EVP_MD_meth_set_update(EVP_MD *md, int (*update)(EVP_MD_CTX *ctx,
                                                     const void *data,
                                                     size_t count));
int EVP_MD_meth_set_final(EVP_MD *md, int (*final)(EVP_MD_CTX *ctx,
                                                   unsigned char *md));
int EVP_MD_meth_set_copy(EVP_MD *md, int (*copy)(EVP_MD_CTX *to,
                                                 const EVP_MD_CTX *from));
int EVP_MD_meth_set_cleanup(EVP_MD *md, int (*cleanup)(EVP_MD_CTX *ctx));
int EVP_MD_meth_set_ctrl(EVP_MD *md, int (*ctrl)(EVP_MD_CTX *ctx, int cmd,
                                                 int p1, void *p2));

int EVP_MD_meth_get_input_blocksize(const EVP_MD *md);
int EVP_MD_meth_get_result_size(const EVP_MD *md);
int EVP_MD_meth_get_app_datasize(const EVP_MD *md);
unsigned long EVP_MD_meth_get_flags(const EVP_MD *md);
int (*EVP_MD_meth_get_init(const EVP_MD *md))(EVP_MD_CTX *ctx);
int (*EVP_MD_meth_get_update(const EVP_MD *md))(EVP_MD_CTX *ctx,
                                                const void *data,
                                                size_t count);
int (*EVP_MD_meth_get_final(const EVP_MD *md))(EVP_MD_CTX *ctx,
                                               unsigned char *md);
int (*EVP_MD_meth_get_copy(const EVP_MD *md))(EVP_MD_CTX *to,
                                              const EVP_MD_CTX *from);
int (*EVP_MD_meth_get_cleanup(const EVP_MD *md))(EVP_MD_CTX *ctx);
int (*EVP_MD_meth_get_ctrl(const EVP_MD *md))(EVP_MD_CTX *ctx, int cmd,
                                              int p1, void *p2);

/* digest can only handle a single block */
#  define EVP_MD_FLAG_ONESHOT     0x0001

/* digest is extensible-output function, XOF */
#  define EVP_MD_FLAG_XOF         0x0002

/* DigestAlgorithmIdentifier flags... */

#  define EVP_MD_FLAG_DIGALGID_MASK               0x0018

/* NULL or absent parameter accepted. Use NULL */

#  define EVP_MD_FLAG_DIGALGID_NULL               0x0000

/* NULL or absent parameter accepted. Use NULL for PKCS#1 otherwise absent */

#  define EVP_MD_FLAG_DIGALGID_ABSENT             0x0008

/* Custom handling via ctrl */

#  define EVP_MD_FLAG_DIGALGID_CUSTOM             0x0018

/* Note if suitable for use in FIPS mode */
#  define EVP_MD_FLAG_FIPS        0x0400

/* Digest ctrls */

#  define EVP_MD_CTRL_DIGALGID                    0x1
#  define EVP_MD_CTRL_MICALG                      0x2
#  define EVP_MD_CTRL_XOF_LEN                     0x3

/* Minimum Algorithm specific ctrl value */

#  define EVP_MD_CTRL_ALG_CTRL                    0x1000

# endif                         /* !EVP_MD */

/* values for EVP_MD_CTX flags */

# define EVP_MD_CTX_FLAG_ONESHOT         0x0001/* digest update will be
                                                * called once only */
# define EVP_MD_CTX_FLAG_CLEANED         0x0002/* context has already been
                                                * cleaned */
# define EVP_MD_CTX_FLAG_REUSE           0x0004/* Don't free up ctx->md_data
                                                * in EVP_MD_CTX_reset */
/*
 * FIPS and pad options are ignored in 1.0.0, definitions are here so we
 * don't accidentally reuse the values for other purposes.
 */

# define EVP_MD_CTX_FLAG_NON_FIPS_ALLOW  0x0008/* Allow use of non FIPS
                                                * digest in FIPS mode */

/*
 * The following PAD options are also currently ignored in 1.0.0, digest
 * parameters are handled through EVP_DigestSign*() and EVP_DigestVerify*()
 * instead.
 */
# define EVP_MD_CTX_FLAG_PAD_MASK        0xF0/* RSA mode to use */
# define EVP_MD_CTX_FLAG_PAD_PKCS1       0x00/* PKCS#1 v1.5 mode */
# define EVP_MD_CTX_FLAG_PAD_X931        0x10/* X9.31 mode */
# define EVP_MD_CTX_FLAG_PAD_PSS         0x20/* PSS mode */

# define EVP_MD_CTX_FLAG_NO_INIT         0x0100/* Don't initialize md_data */
/*
 * Some functions such as EVP_DigestSign only finalise copies of internal
 * contexts so additional data can be included after the finalisation call.
 * This is inefficient if this functionality is not required: it is disabled
 * if the following flag is set.
 */
# define EVP_MD_CTX_FLAG_FINALISE        0x0200
/* NOTE: 0x0400 is reserved for internal usage */

EVP_CIPHER *EVP_CIPHER_meth_new(int cipher_type, int block_size, int key_len);
EVP_CIPHER *EVP_CIPHER_meth_dup(const EVP_CIPHER *cipher);
void EVP_CIPHER_meth_free(EVP_CIPHER *cipher);

int EVP_CIPHER_meth_set_iv_length(EVP_CIPHER *cipher, int iv_len);
int EVP_CIPHER_meth_set_flags(EVP_CIPHER *cipher, unsigned long flags);
int EVP_CIPHER_meth_set_impl_ctx_size(EVP_CIPHER *cipher, int ctx_size);
int EVP_CIPHER_meth_set_init(EVP_CIPHER *cipher,
                             int (*init) (EVP_CIPHER_CTX *ctx,
                                          const unsigned char *key,
                                          const unsigned char *iv,
                                          int enc));
int EVP_CIPHER_meth_set_do_cipher(EVP_CIPHER *cipher,
                                  int (*do_cipher) (EVP_CIPHER_CTX *ctx,
                                                    unsigned char *out,
                                                    const unsigned char *in,
                                                    size_t inl));
int EVP_CIPHER_meth_set_cleanup(EVP_CIPHER *cipher,
                                int (*cleanup) (EVP_CIPHER_CTX *));
int EVP_CIPHER_meth_set_set_asn1_params(EVP_CIPHER *cipher,
                                        int (*set_asn1_parameters) (EVP_CIPHER_CTX *,
                                                                    ASN1_TYPE *));
int EVP_CIPHER_meth_set_get_asn1_params(EVP_CIPHER *cipher,
                                        int (*get_asn1_parameters) (EVP_CIPHER_CTX *,
                                                                    ASN1_TYPE *));
int EVP_CIPHER_meth_set_ctrl(EVP_CIPHER *cipher,
                             int (*ctrl) (EVP_CIPHER_CTX *, int type,
                                          int arg, void *ptr));

int (*EVP_CIPHER_meth_get_init(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
                                                          const unsigned char *key,
                                                          const unsigned char *iv,
                                                          int enc);
int (*EVP_CIPHER_meth_get_do_cipher(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *ctx,
                                                               unsigned char *out,
                                                               const unsigned char *in,
                                                               size_t inl);
int (*EVP_CIPHER_meth_get_cleanup(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *);
int (*EVP_CIPHER_meth_get_set_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
                                                                     ASN1_TYPE *);
int (*EVP_CIPHER_meth_get_get_asn1_params(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
                                                               ASN1_TYPE *);
int (*EVP_CIPHER_meth_get_ctrl(const EVP_CIPHER *cipher))(EVP_CIPHER_CTX *,
                                                          int type, int arg,
                                                          void *ptr);

/* Values for cipher flags */

/* Modes for ciphers */

# define         EVP_CIPH_STREAM_CIPHER          0x0
# define         EVP_CIPH_ECB_MODE               0x1
# define         EVP_CIPH_CBC_MODE               0x2
# define         EVP_CIPH_CFB_MODE               0x3
# define         EVP_CIPH_OFB_MODE               0x4
# define         EVP_CIPH_CTR_MODE               0x5
# define         EVP_CIPH_GCM_MODE               0x6
# define         EVP_CIPH_CCM_MODE               0x7
# define         EVP_CIPH_XTS_MODE               0x10001
# define         EVP_CIPH_WRAP_MODE              0x10002
# define         EVP_CIPH_OCB_MODE               0x10003
# define         EVP_CIPH_SIV_MODE               0x10004
# define         EVP_CIPH_MODE                   0xF0007
/* Set if variable length cipher */
# define         EVP_CIPH_VARIABLE_LENGTH        0x8
/* Set if the iv handling should be done by the cipher itself */
# define         EVP_CIPH_CUSTOM_IV              0x10
/* Set if the cipher's init() function should be called if key is NULL */
# define         EVP_CIPH_ALWAYS_CALL_INIT       0x20
/* Call ctrl() to init cipher parameters */
# define         EVP_CIPH_CTRL_INIT              0x40
/* Don't use standard key length function */
# define         EVP_CIPH_CUSTOM_KEY_LENGTH      0x80
/* Don't use standard block padding */
# define         EVP_CIPH_NO_PADDING             0x100
/* cipher handles random key generation */
# define         EVP_CIPH_RAND_KEY               0x200
/* cipher has its own additional copying logic */
# define         EVP_CIPH_CUSTOM_COPY            0x400
/* Don't use standard iv length function */
# define         EVP_CIPH_CUSTOM_IV_LENGTH       0x800
/* Legacy and no longer relevant: Allow use default ASN1 get/set iv */
# define         EVP_CIPH_FLAG_DEFAULT_ASN1      0
/* Free:                                         0x1000 */
/* Buffer length in bits not bytes: CFB1 mode only */
# define         EVP_CIPH_FLAG_LENGTH_BITS       0x2000
/* Note if suitable for use in FIPS mode */
# define         EVP_CIPH_FLAG_FIPS              0x4000
/* Allow non FIPS cipher in FIPS mode */
# define         EVP_CIPH_FLAG_NON_FIPS_ALLOW    0x8000
/*
 * Cipher handles any and all padding logic as well as finalisation.
 */
# define         EVP_CIPH_FLAG_CUSTOM_CIPHER     0x100000
# define         EVP_CIPH_FLAG_AEAD_CIPHER       0x200000
# define         EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK 0x400000
/* Cipher can handle pipeline operations */
# define         EVP_CIPH_FLAG_PIPELINE          0X800000
/* For provider implementations that handle  ASN1 get/set param themselves */
# define         EVP_CIPH_FLAG_CUSTOM_ASN1       0x1000000

/*
 * Cipher context flag to indicate we can handle wrap mode: if allowed in
 * older applications it could overflow buffers.
 */

# define         EVP_CIPHER_CTX_FLAG_WRAP_ALLOW  0x1

/* ctrl() values */

# define         EVP_CTRL_INIT                   0x0
# define         EVP_CTRL_SET_KEY_LENGTH         0x1
# define         EVP_CTRL_GET_RC2_KEY_BITS       0x2
# define         EVP_CTRL_SET_RC2_KEY_BITS       0x3
# define         EVP_CTRL_GET_RC5_ROUNDS         0x4
# define         EVP_CTRL_SET_RC5_ROUNDS         0x5
# define         EVP_CTRL_RAND_KEY               0x6
# define         EVP_CTRL_PBE_PRF_NID            0x7
# define         EVP_CTRL_COPY                   0x8
# define         EVP_CTRL_AEAD_SET_IVLEN         0x9
# define         EVP_CTRL_AEAD_GET_TAG           0x10
# define         EVP_CTRL_AEAD_SET_TAG           0x11
# define         EVP_CTRL_AEAD_SET_IV_FIXED      0x12
# define         EVP_CTRL_GCM_SET_IVLEN          EVP_CTRL_AEAD_SET_IVLEN
# define         EVP_CTRL_GCM_GET_TAG            EVP_CTRL_AEAD_GET_TAG
# define         EVP_CTRL_GCM_SET_TAG            EVP_CTRL_AEAD_SET_TAG
# define         EVP_CTRL_GCM_SET_IV_FIXED       EVP_CTRL_AEAD_SET_IV_FIXED
# define         EVP_CTRL_GCM_IV_GEN             0x13
# define         EVP_CTRL_CCM_SET_IVLEN          EVP_CTRL_AEAD_SET_IVLEN
# define         EVP_CTRL_CCM_GET_TAG            EVP_CTRL_AEAD_GET_TAG
# define         EVP_CTRL_CCM_SET_TAG            EVP_CTRL_AEAD_SET_TAG
# define         EVP_CTRL_CCM_SET_IV_FIXED       EVP_CTRL_AEAD_SET_IV_FIXED
# define         EVP_CTRL_CCM_SET_L              0x14
# define         EVP_CTRL_CCM_SET_MSGLEN         0x15
/*
 * AEAD cipher deduces payload length and returns number of bytes required to
 * store MAC and eventual padding. Subsequent call to EVP_Cipher even
 * appends/verifies MAC.
 */
# define         EVP_CTRL_AEAD_TLS1_AAD          0x16
/* Used by composite AEAD ciphers, no-op in GCM, CCM... */
# define         EVP_CTRL_AEAD_SET_MAC_KEY       0x17
/* Set the GCM invocation field, decrypt only */
# define         EVP_CTRL_GCM_SET_IV_INV         0x18

# define         EVP_CTRL_TLS1_1_MULTIBLOCK_AAD  0x19
# define         EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT      0x1a
# define         EVP_CTRL_TLS1_1_MULTIBLOCK_DECRYPT      0x1b
# define         EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE  0x1c

# define         EVP_CTRL_SSL3_MASTER_SECRET             0x1d

/* EVP_CTRL_SET_SBOX takes the char * specifying S-boxes */
# define         EVP_CTRL_SET_SBOX                       0x1e
/*
 * EVP_CTRL_SBOX_USED takes a 'size_t' and 'char *', pointing at a
 * pre-allocated buffer with specified size
 */
# define         EVP_CTRL_SBOX_USED                      0x1f
/* EVP_CTRL_KEY_MESH takes 'size_t' number of bytes to mesh the key after,
 * 0 switches meshing off
 */
# define         EVP_CTRL_KEY_MESH                       0x20
/* EVP_CTRL_BLOCK_PADDING_MODE takes the padding mode */
# define         EVP_CTRL_BLOCK_PADDING_MODE             0x21

/* Set the output buffers to use for a pipelined operation */
# define         EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS       0x22
/* Set the input buffers to use for a pipelined operation */
# define         EVP_CTRL_SET_PIPELINE_INPUT_BUFS        0x23
/* Set the input buffer lengths to use for a pipelined operation */
# define         EVP_CTRL_SET_PIPELINE_INPUT_LENS        0x24
/* Get the IV length used by the cipher */
# define         EVP_CTRL_GET_IVLEN                      0x25
/* Get the IV used by the cipher */
# define         EVP_CTRL_GET_IV                         0x26
/* Tell the cipher it's doing a speed test (SIV disallows multiple ops) */
# define         EVP_CTRL_SET_SPEED                      0x27

/* Padding modes */
#define EVP_PADDING_PKCS7       1
#define EVP_PADDING_ISO7816_4   2
#define EVP_PADDING_ANSI923     3
#define EVP_PADDING_ISO10126    4
#define EVP_PADDING_ZERO        5

/* RFC 5246 defines additional data to be 13 bytes in length */
# define         EVP_AEAD_TLS1_AAD_LEN           13

typedef struct {
    unsigned char *out;
    const unsigned char *inp;
    size_t len;
    unsigned int interleave;
} EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM;

/* GCM TLS constants */
/* Length of fixed part of IV derived from PRF */
# define EVP_GCM_TLS_FIXED_IV_LEN                        4
/* Length of explicit part of IV part of TLS records */
# define EVP_GCM_TLS_EXPLICIT_IV_LEN                     8
/* Length of tag for TLS */
# define EVP_GCM_TLS_TAG_LEN                             16

/* CCM TLS constants */
/* Length of fixed part of IV derived from PRF */
# define EVP_CCM_TLS_FIXED_IV_LEN                        4
/* Length of explicit part of IV part of TLS records */
# define EVP_CCM_TLS_EXPLICIT_IV_LEN                     8
/* Total length of CCM IV length for TLS */
# define EVP_CCM_TLS_IV_LEN                              12
/* Length of tag for TLS */
# define EVP_CCM_TLS_TAG_LEN                             16
/* Length of CCM8 tag for TLS */
# define EVP_CCM8_TLS_TAG_LEN                            8

/* Length of tag for TLS */
# define EVP_CHACHAPOLY_TLS_TAG_LEN                      16

typedef struct evp_cipher_info_st {
    const EVP_CIPHER *cipher;
    unsigned char iv[EVP_MAX_IV_LENGTH];
} EVP_CIPHER_INFO;


/* Password based encryption function */
typedef int (EVP_PBE_KEYGEN) (EVP_CIPHER_CTX *ctx, const char *pass,
                              int passlen, ASN1_TYPE *param,
                              const EVP_CIPHER *cipher, const EVP_MD *md,
                              int en_de);

# ifndef OPENSSL_NO_RSA
#  define EVP_PKEY_assign_RSA(pkey,rsa) EVP_PKEY_assign((pkey),EVP_PKEY_RSA,\
                                        (rsa))
# endif

# ifndef OPENSSL_NO_DSA
#  define EVP_PKEY_assign_DSA(pkey,dsa) EVP_PKEY_assign((pkey),EVP_PKEY_DSA,\
                                        (dsa))
# endif

# ifndef OPENSSL_NO_DH
#  define EVP_PKEY_assign_DH(pkey,dh) EVP_PKEY_assign((pkey),EVP_PKEY_DH,(dh))
# endif

# ifndef OPENSSL_NO_EC
#  define EVP_PKEY_assign_EC_KEY(pkey,eckey) EVP_PKEY_assign((pkey),EVP_PKEY_EC,\
                                        (eckey))
# endif
# ifndef OPENSSL_NO_SIPHASH
#  define EVP_PKEY_assign_SIPHASH(pkey,shkey) EVP_PKEY_assign((pkey),\
                                        EVP_PKEY_SIPHASH,(shkey))
# endif

# ifndef OPENSSL_NO_POLY1305
#  define EVP_PKEY_assign_POLY1305(pkey,polykey) EVP_PKEY_assign((pkey),\
                                        EVP_PKEY_POLY1305,(polykey))
# endif

/* Add some extra combinations */
# define EVP_get_digestbynid(a) EVP_get_digestbyname(OBJ_nid2sn(a))
# define EVP_get_digestbyobj(a) EVP_get_digestbynid(OBJ_obj2nid(a))
# define EVP_get_cipherbynid(a) EVP_get_cipherbyname(OBJ_nid2sn(a))
# define EVP_get_cipherbyobj(a) EVP_get_cipherbynid(OBJ_obj2nid(a))

int EVP_MD_type(const EVP_MD *md);
# define EVP_MD_nid(e)                   EVP_MD_type(e)
const char *EVP_MD_name(const EVP_MD *md);
const OSSL_PROVIDER *EVP_MD_provider(const EVP_MD *md);
int EVP_MD_pkey_type(const EVP_MD *md);
int EVP_MD_size(const EVP_MD *md);
int EVP_MD_block_size(const EVP_MD *md);
unsigned long EVP_MD_flags(const EVP_MD *md);

const EVP_MD *EVP_MD_CTX_md(const EVP_MD_CTX *ctx);
int (*EVP_MD_CTX_update_fn(EVP_MD_CTX *ctx))(EVP_MD_CTX *ctx,
                                             const void *data, size_t count);
void EVP_MD_CTX_set_update_fn(EVP_MD_CTX *ctx,
                              int (*update) (EVP_MD_CTX *ctx,
                                             const void *data, size_t count));
# define EVP_MD_CTX_name(e)              EVP_MD_name(EVP_MD_CTX_md(e))
# define EVP_MD_CTX_size(e)              EVP_MD_size(EVP_MD_CTX_md(e))
# define EVP_MD_CTX_block_size(e)        EVP_MD_block_size(EVP_MD_CTX_md(e))
# define EVP_MD_CTX_type(e)              EVP_MD_type(EVP_MD_CTX_md(e))
EVP_PKEY_CTX *EVP_MD_CTX_pkey_ctx(const EVP_MD_CTX *ctx);
void EVP_MD_CTX_set_pkey_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pctx);
void *EVP_MD_CTX_md_data(const EVP_MD_CTX *ctx);

int EVP_CIPHER_nid(const EVP_CIPHER *cipher);
const char *EVP_CIPHER_name(const EVP_CIPHER *cipher);
int EVP_CIPHER_is_a(const EVP_CIPHER *cipher, const char *name);
const OSSL_PROVIDER *EVP_CIPHER_provider(const EVP_CIPHER *cipher);
int EVP_CIPHER_block_size(const EVP_CIPHER *cipher);
int EVP_CIPHER_impl_ctx_size(const EVP_CIPHER *cipher);
int EVP_CIPHER_key_length(const EVP_CIPHER *cipher);
int EVP_CIPHER_iv_length(const EVP_CIPHER *cipher);
unsigned long EVP_CIPHER_flags(const EVP_CIPHER *cipher);
int EVP_CIPHER_mode(const EVP_CIPHER *cipher);
EVP_CIPHER *EVP_CIPHER_fetch(OPENSSL_CTX *ctx, const char *algorithm,
                             const char *properties);
int EVP_CIPHER_up_ref(EVP_CIPHER *cipher);
void EVP_CIPHER_free(EVP_CIPHER *cipher);

const EVP_CIPHER *EVP_CIPHER_CTX_cipher(const EVP_CIPHER_CTX *ctx);
int EVP_CIPHER_CTX_encrypting(const EVP_CIPHER_CTX *ctx);
int EVP_CIPHER_CTX_nid(const EVP_CIPHER_CTX *ctx);
int EVP_CIPHER_CTX_block_size(const EVP_CIPHER_CTX *ctx);
int EVP_CIPHER_CTX_key_length(const EVP_CIPHER_CTX *ctx);
int EVP_CIPHER_CTX_iv_length(const EVP_CIPHER_CTX *ctx);
int EVP_CIPHER_CTX_tag_length(const EVP_CIPHER_CTX *ctx);
const unsigned char *EVP_CIPHER_CTX_iv(const EVP_CIPHER_CTX *ctx);
const unsigned char *EVP_CIPHER_CTX_original_iv(const EVP_CIPHER_CTX *ctx);
unsigned char *EVP_CIPHER_CTX_iv_noconst(EVP_CIPHER_CTX *ctx);
unsigned char *EVP_CIPHER_CTX_buf_noconst(EVP_CIPHER_CTX *ctx);
int EVP_CIPHER_CTX_num(const EVP_CIPHER_CTX *ctx);
int EVP_CIPHER_CTX_set_num(EVP_CIPHER_CTX *ctx, int num);
int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in);
void *EVP_CIPHER_CTX_get_app_data(const EVP_CIPHER_CTX *ctx);
void EVP_CIPHER_CTX_set_app_data(EVP_CIPHER_CTX *ctx, void *data);
void *EVP_CIPHER_CTX_get_cipher_data(const EVP_CIPHER_CTX *ctx);
void *EVP_CIPHER_CTX_set_cipher_data(EVP_CIPHER_CTX *ctx, void *cipher_data);
# define EVP_CIPHER_CTX_name(c)         EVP_CIPHER_name(EVP_CIPHER_CTX_cipher(c))
# define EVP_CIPHER_CTX_type(c)         EVP_CIPHER_type(EVP_CIPHER_CTX_cipher(c))
# if !OPENSSL_API_1_1_0
#  define EVP_CIPHER_CTX_flags(c)       EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(c))
# endif
# define EVP_CIPHER_CTX_mode(c)         EVP_CIPHER_mode(EVP_CIPHER_CTX_cipher(c))

# define EVP_ENCODE_LENGTH(l)    ((((l)+2)/3*4)+((l)/48+1)*2+80)
# define EVP_DECODE_LENGTH(l)    (((l)+3)/4*3+80)

# define EVP_SignInit_ex(a,b,c)          EVP_DigestInit_ex(a,b,c)
# define EVP_SignInit(a,b)               EVP_DigestInit(a,b)
# define EVP_SignUpdate(a,b,c)           EVP_DigestUpdate(a,b,c)
# define EVP_VerifyInit_ex(a,b,c)        EVP_DigestInit_ex(a,b,c)
# define EVP_VerifyInit(a,b)             EVP_DigestInit(a,b)
# define EVP_VerifyUpdate(a,b,c)         EVP_DigestUpdate(a,b,c)
# define EVP_OpenUpdate(a,b,c,d,e)       EVP_DecryptUpdate(a,b,c,d,e)
# define EVP_SealUpdate(a,b,c,d,e)       EVP_EncryptUpdate(a,b,c,d,e)

# ifdef CONST_STRICT
void BIO_set_md(BIO *, const EVP_MD *md);
# else
#  define BIO_set_md(b,md)          BIO_ctrl(b,BIO_C_SET_MD,0,(void *)(md))
# endif
# define BIO_get_md(b,mdp)          BIO_ctrl(b,BIO_C_GET_MD,0,(mdp))
# define BIO_get_md_ctx(b,mdcp)     BIO_ctrl(b,BIO_C_GET_MD_CTX,0,(mdcp))
# define BIO_set_md_ctx(b,mdcp)     BIO_ctrl(b,BIO_C_SET_MD_CTX,0,(mdcp))
# define BIO_get_cipher_status(b)   BIO_ctrl(b,BIO_C_GET_CIPHER_STATUS,0,NULL)
# define BIO_get_cipher_ctx(b,c_pp) BIO_ctrl(b,BIO_C_GET_CIPHER_CTX,0,(c_pp))

/*__owur*/ int EVP_Cipher(EVP_CIPHER_CTX *c,
                          unsigned char *out,
                          const unsigned char *in, unsigned int inl);

# define EVP_add_cipher_alias(n,alias) \
        OBJ_NAME_add((alias),OBJ_NAME_TYPE_CIPHER_METH|OBJ_NAME_ALIAS,(n))
# define EVP_add_digest_alias(n,alias) \
        OBJ_NAME_add((alias),OBJ_NAME_TYPE_MD_METH|OBJ_NAME_ALIAS,(n))
# define EVP_delete_cipher_alias(alias) \
        OBJ_NAME_remove(alias,OBJ_NAME_TYPE_CIPHER_METH|OBJ_NAME_ALIAS);
# define EVP_delete_digest_alias(alias) \
        OBJ_NAME_remove(alias,OBJ_NAME_TYPE_MD_METH|OBJ_NAME_ALIAS);

int EVP_MD_get_params(const EVP_MD *digest, OSSL_PARAM params[]);
int EVP_MD_CTX_set_params(EVP_MD_CTX *ctx, const OSSL_PARAM params[]);
int EVP_MD_CTX_get_params(EVP_MD_CTX *ctx, OSSL_PARAM params[]);
const OSSL_PARAM *EVP_MD_gettable_params(const EVP_MD *digest);
const OSSL_PARAM *EVP_MD_settable_ctx_params(const EVP_MD *md);
const OSSL_PARAM *EVP_MD_gettable_ctx_params(const EVP_MD *md);
const OSSL_PARAM *EVP_MD_CTX_settable_params(EVP_MD_CTX *ctx);
const OSSL_PARAM *EVP_MD_CTX_gettable_params(EVP_MD_CTX *ctx);
int EVP_MD_CTX_ctrl(EVP_MD_CTX *ctx, int cmd, int p1, void *p2);
EVP_MD_CTX *EVP_MD_CTX_new(void);
int EVP_MD_CTX_reset(EVP_MD_CTX *ctx);
void EVP_MD_CTX_free(EVP_MD_CTX *ctx);
# define EVP_MD_CTX_create()     EVP_MD_CTX_new()
# define EVP_MD_CTX_init(ctx)    EVP_MD_CTX_reset((ctx))
# define EVP_MD_CTX_destroy(ctx) EVP_MD_CTX_free((ctx))
__owur int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in);
void EVP_MD_CTX_set_flags(EVP_MD_CTX *ctx, int flags);
void EVP_MD_CTX_clear_flags(EVP_MD_CTX *ctx, int flags);
int EVP_MD_CTX_test_flags(const EVP_MD_CTX *ctx, int flags);
__owur int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type,
                                 ENGINE *impl);
__owur int EVP_DigestUpdate(EVP_MD_CTX *ctx, const void *d,
                                size_t cnt);
__owur int EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *md,
                                  unsigned int *s);
__owur int EVP_Digest(const void *data, size_t count,
                          unsigned char *md, unsigned int *size,
                          const EVP_MD *type, ENGINE *impl);

__owur int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in);
__owur int EVP_DigestInit(EVP_MD_CTX *ctx, const EVP_MD *type);
__owur int EVP_DigestFinal(EVP_MD_CTX *ctx, unsigned char *md,
                           unsigned int *s);
__owur int EVP_DigestFinalXOF(EVP_MD_CTX *ctx, unsigned char *md,
                              size_t len);

__owur EVP_MD *EVP_MD_fetch(OPENSSL_CTX *ctx, const char *algorithm,
                            const char *properties);
int EVP_MD_up_ref(EVP_MD *md);
void EVP_MD_free(EVP_MD *md);

int EVP_read_pw_string(char *buf, int length, const char *prompt, int verify);
int EVP_read_pw_string_min(char *buf, int minlen, int maxlen,
                           const char *prompt, int verify);
void EVP_set_pw_prompt(const char *prompt);
char *EVP_get_pw_prompt(void);

__owur int EVP_BytesToKey(const EVP_CIPHER *type, const EVP_MD *md,
                          const unsigned char *salt,
                          const unsigned char *data, int datal, int count,
                          unsigned char *key, unsigned char *iv);

void EVP_CIPHER_CTX_set_flags(EVP_CIPHER_CTX *ctx, int flags);
void EVP_CIPHER_CTX_clear_flags(EVP_CIPHER_CTX *ctx, int flags);
int EVP_CIPHER_CTX_test_flags(const EVP_CIPHER_CTX *ctx, int flags);

__owur int EVP_EncryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
                           const unsigned char *key, const unsigned char *iv);
/*__owur*/ int EVP_EncryptInit_ex(EVP_CIPHER_CTX *ctx,
                                  const EVP_CIPHER *cipher, ENGINE *impl,
                                  const unsigned char *key,
                                  const unsigned char *iv);
/*__owur*/ int EVP_EncryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,
                                 int *outl, const unsigned char *in, int inl);
/*__owur*/ int EVP_EncryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out,
                                   int *outl);
/*__owur*/ int EVP_EncryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out,
                                int *outl);

__owur int EVP_DecryptInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
                           const unsigned char *key, const unsigned char *iv);
/*__owur*/ int EVP_DecryptInit_ex(EVP_CIPHER_CTX *ctx,
                                  const EVP_CIPHER *cipher, ENGINE *impl,
                                  const unsigned char *key,
                                  const unsigned char *iv);
/*__owur*/ int EVP_DecryptUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,
                                 int *outl, const unsigned char *in, int inl);
__owur int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *outm,
                            int *outl);
/*__owur*/ int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *outm,
                                   int *outl);

__owur int EVP_CipherInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
                          const unsigned char *key, const unsigned char *iv,
                          int enc);
/*__owur*/ int EVP_CipherInit_ex(EVP_CIPHER_CTX *ctx,
                                 const EVP_CIPHER *cipher, ENGINE *impl,
                                 const unsigned char *key,
                                 const unsigned char *iv, int enc);
__owur int EVP_CipherUpdate(EVP_CIPHER_CTX *ctx, unsigned char *out,
                            int *outl, const unsigned char *in, int inl);
__owur int EVP_CipherFinal(EVP_CIPHER_CTX *ctx, unsigned char *outm,
                           int *outl);
__owur int EVP_CipherFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *outm,
                              int *outl);

__owur int EVP_SignFinal(EVP_MD_CTX *ctx, unsigned char *md, unsigned int *s,
                         EVP_PKEY *pkey);

__owur int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret,
                          size_t *siglen, const unsigned char *tbs,
                          size_t tbslen);

__owur int EVP_VerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sigbuf,
                           unsigned int siglen, EVP_PKEY *pkey);

__owur int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
                            size_t siglen, const unsigned char *tbs,
                            size_t tbslen);

int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
                          const char *mdname, const char *props, EVP_PKEY *pkey,
                          EVP_SIGNATURE *signature);
/*__owur*/ int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
                                  const EVP_MD *type, ENGINE *e,
                                  EVP_PKEY *pkey);
int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize);
__owur int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
                               size_t *siglen);

int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
                            const char *mdname, const char *props,
                            EVP_PKEY *pkey, EVP_SIGNATURE *signature);
__owur int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
                                const EVP_MD *type, ENGINE *e,
                                EVP_PKEY *pkey);
int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize);
__owur int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
                                 size_t siglen);

# ifndef OPENSSL_NO_RSA
__owur int EVP_OpenInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
                        const unsigned char *ek, int ekl,
                        const unsigned char *iv, EVP_PKEY *priv);
__owur int EVP_OpenFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl);

__owur int EVP_SealInit(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *type,
                        unsigned char **ek, int *ekl, unsigned char *iv,
                        EVP_PKEY **pubk, int npubk);
__owur int EVP_SealFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl);
# endif

EVP_ENCODE_CTX *EVP_ENCODE_CTX_new(void);
void EVP_ENCODE_CTX_free(EVP_ENCODE_CTX *ctx);
int EVP_ENCODE_CTX_copy(EVP_ENCODE_CTX *dctx, const EVP_ENCODE_CTX *sctx);
int EVP_ENCODE_CTX_num(EVP_ENCODE_CTX *ctx);
void EVP_EncodeInit(EVP_ENCODE_CTX *ctx);
int EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
                     const unsigned char *in, int inl);
void EVP_EncodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl);
int EVP_EncodeBlock(unsigned char *t, const unsigned char *f, int n);

void EVP_DecodeInit(EVP_ENCODE_CTX *ctx);
int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl,
                     const unsigned char *in, int inl);
int EVP_DecodeFinal(EVP_ENCODE_CTX *ctx, unsigned
                    char *out, int *outl);
int EVP_DecodeBlock(unsigned char *t, const unsigned char *f, int n);

# if !OPENSSL_API_1_1_0
#  define EVP_CIPHER_CTX_init(c)      EVP_CIPHER_CTX_reset(c)
#  define EVP_CIPHER_CTX_cleanup(c)   EVP_CIPHER_CTX_reset(c)
# endif
EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void);
int EVP_CIPHER_CTX_reset(EVP_CIPHER_CTX *c);
void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *c);
int EVP_CIPHER_CTX_set_key_length(EVP_CIPHER_CTX *x, int keylen);
int EVP_CIPHER_CTX_set_padding(EVP_CIPHER_CTX *c, int pad);
int EVP_CIPHER_CTX_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr);
int EVP_CIPHER_CTX_rand_key(EVP_CIPHER_CTX *ctx, unsigned char *key);
int EVP_CIPHER_get_params(EVP_CIPHER *cipher, OSSL_PARAM params[]);
int EVP_CIPHER_CTX_set_params(EVP_CIPHER_CTX *ctx, const OSSL_PARAM params[]);
int EVP_CIPHER_CTX_get_params(EVP_CIPHER_CTX *ctx, OSSL_PARAM params[]);
const OSSL_PARAM *EVP_CIPHER_gettable_params(const EVP_CIPHER *cipher);
const OSSL_PARAM *EVP_CIPHER_settable_ctx_params(const EVP_CIPHER *cipher);
const OSSL_PARAM *EVP_CIPHER_gettable_ctx_params(const EVP_CIPHER *cipher);

const BIO_METHOD *BIO_f_md(void);
const BIO_METHOD *BIO_f_base64(void);
const BIO_METHOD *BIO_f_cipher(void);
const BIO_METHOD *BIO_f_reliable(void);
__owur int BIO_set_cipher(BIO *b, const EVP_CIPHER *c, const unsigned char *k,
                          const unsigned char *i, int enc);

const EVP_MD *EVP_md_null(void);
# ifndef OPENSSL_NO_MD2
const EVP_MD *EVP_md2(void);
# endif
# ifndef OPENSSL_NO_MD4
const EVP_MD *EVP_md4(void);
# endif
# ifndef OPENSSL_NO_MD5
const EVP_MD *EVP_md5(void);
const EVP_MD *EVP_md5_sha1(void);
# endif
# ifndef OPENSSL_NO_BLAKE2
const EVP_MD *EVP_blake2b512(void);
const EVP_MD *EVP_blake2s256(void);
# endif
const EVP_MD *EVP_sha1(void);
const EVP_MD *EVP_sha224(void);
const EVP_MD *EVP_sha256(void);
const EVP_MD *EVP_sha384(void);
const EVP_MD *EVP_sha512(void);
const EVP_MD *EVP_sha512_224(void);
const EVP_MD *EVP_sha512_256(void);
const EVP_MD *EVP_sha3_224(void);
const EVP_MD *EVP_sha3_256(void);
const EVP_MD *EVP_sha3_384(void);
const EVP_MD *EVP_sha3_512(void);
const EVP_MD *EVP_shake128(void);
const EVP_MD *EVP_shake256(void);

# ifndef OPENSSL_NO_MDC2
const EVP_MD *EVP_mdc2(void);
# endif
# ifndef OPENSSL_NO_RMD160
const EVP_MD *EVP_ripemd160(void);
# endif
# ifndef OPENSSL_NO_WHIRLPOOL
const EVP_MD *EVP_whirlpool(void);
# endif
# ifndef OPENSSL_NO_SM3
const EVP_MD *EVP_sm3(void);
# endif
const EVP_CIPHER *EVP_enc_null(void); /* does nothing :-) */
# ifndef OPENSSL_NO_DES
const EVP_CIPHER *EVP_des_ecb(void);
const EVP_CIPHER *EVP_des_ede(void);
const EVP_CIPHER *EVP_des_ede3(void);
const EVP_CIPHER *EVP_des_ede_ecb(void);
const EVP_CIPHER *EVP_des_ede3_ecb(void);
const EVP_CIPHER *EVP_des_cfb64(void);
#  define EVP_des_cfb EVP_des_cfb64
const EVP_CIPHER *EVP_des_cfb1(void);
const EVP_CIPHER *EVP_des_cfb8(void);
const EVP_CIPHER *EVP_des_ede_cfb64(void);
#  define EVP_des_ede_cfb EVP_des_ede_cfb64
const EVP_CIPHER *EVP_des_ede3_cfb64(void);
#  define EVP_des_ede3_cfb EVP_des_ede3_cfb64
const EVP_CIPHER *EVP_des_ede3_cfb1(void);
const EVP_CIPHER *EVP_des_ede3_cfb8(void);
const EVP_CIPHER *EVP_des_ofb(void);
const EVP_CIPHER *EVP_des_ede_ofb(void);
const EVP_CIPHER *EVP_des_ede3_ofb(void);
const EVP_CIPHER *EVP_des_cbc(void);
const EVP_CIPHER *EVP_des_ede_cbc(void);
const EVP_CIPHER *EVP_des_ede3_cbc(void);
const EVP_CIPHER *EVP_desx_cbc(void);
const EVP_CIPHER *EVP_des_ede3_wrap(void);
/*
 * This should now be supported through the dev_crypto ENGINE. But also, why
 * are rc4 and md5 declarations made here inside a "NO_DES" precompiler
 * branch?
 */
# endif
# ifndef OPENSSL_NO_RC4
const EVP_CIPHER *EVP_rc4(void);
const EVP_CIPHER *EVP_rc4_40(void);
#  ifndef OPENSSL_NO_MD5
const EVP_CIPHER *EVP_rc4_hmac_md5(void);
#  endif
# endif
# ifndef OPENSSL_NO_IDEA
const EVP_CIPHER *EVP_idea_ecb(void);
const EVP_CIPHER *EVP_idea_cfb64(void);
#  define EVP_idea_cfb EVP_idea_cfb64
const EVP_CIPHER *EVP_idea_ofb(void);
const EVP_CIPHER *EVP_idea_cbc(void);
# endif
# ifndef OPENSSL_NO_RC2
const EVP_CIPHER *EVP_rc2_ecb(void);
const EVP_CIPHER *EVP_rc2_cbc(void);
const EVP_CIPHER *EVP_rc2_40_cbc(void);
const EVP_CIPHER *EVP_rc2_64_cbc(void);
const EVP_CIPHER *EVP_rc2_cfb64(void);
#  define EVP_rc2_cfb EVP_rc2_cfb64
const EVP_CIPHER *EVP_rc2_ofb(void);
# endif
# ifndef OPENSSL_NO_BF
const EVP_CIPHER *EVP_bf_ecb(void);
const EVP_CIPHER *EVP_bf_cbc(void);
const EVP_CIPHER *EVP_bf_cfb64(void);
#  define EVP_bf_cfb EVP_bf_cfb64
const EVP_CIPHER *EVP_bf_ofb(void);
# endif
# ifndef OPENSSL_NO_CAST
const EVP_CIPHER *EVP_cast5_ecb(void);
const EVP_CIPHER *EVP_cast5_cbc(void);
const EVP_CIPHER *EVP_cast5_cfb64(void);
#  define EVP_cast5_cfb EVP_cast5_cfb64
const EVP_CIPHER *EVP_cast5_ofb(void);
# endif
# ifndef OPENSSL_NO_RC5
const EVP_CIPHER *EVP_rc5_32_12_16_cbc(void);
const EVP_CIPHER *EVP_rc5_32_12_16_ecb(void);
const EVP_CIPHER *EVP_rc5_32_12_16_cfb64(void);
#  define EVP_rc5_32_12_16_cfb EVP_rc5_32_12_16_cfb64
const EVP_CIPHER *EVP_rc5_32_12_16_ofb(void);
# endif
const EVP_CIPHER *EVP_aes_128_ecb(void);
const EVP_CIPHER *EVP_aes_128_cbc(void);
const EVP_CIPHER *EVP_aes_128_cfb1(void);
const EVP_CIPHER *EVP_aes_128_cfb8(void);
const EVP_CIPHER *EVP_aes_128_cfb128(void);
# define EVP_aes_128_cfb EVP_aes_128_cfb128
const EVP_CIPHER *EVP_aes_128_ofb(void);
const EVP_CIPHER *EVP_aes_128_ctr(void);
const EVP_CIPHER *EVP_aes_128_ccm(void);
const EVP_CIPHER *EVP_aes_128_gcm(void);
const EVP_CIPHER *EVP_aes_128_xts(void);
const EVP_CIPHER *EVP_aes_128_wrap(void);
const EVP_CIPHER *EVP_aes_128_wrap_pad(void);
# ifndef OPENSSL_NO_OCB
const EVP_CIPHER *EVP_aes_128_ocb(void);
# endif
const EVP_CIPHER *EVP_aes_192_ecb(void);
const EVP_CIPHER *EVP_aes_192_cbc(void);
const EVP_CIPHER *EVP_aes_192_cfb1(void);
const EVP_CIPHER *EVP_aes_192_cfb8(void);
const EVP_CIPHER *EVP_aes_192_cfb128(void);
# define EVP_aes_192_cfb EVP_aes_192_cfb128
const EVP_CIPHER *EVP_aes_192_ofb(void);
const EVP_CIPHER *EVP_aes_192_ctr(void);
const EVP_CIPHER *EVP_aes_192_ccm(void);
const EVP_CIPHER *EVP_aes_192_gcm(void);
const EVP_CIPHER *EVP_aes_192_wrap(void);
const EVP_CIPHER *EVP_aes_192_wrap_pad(void);
# ifndef OPENSSL_NO_OCB
const EVP_CIPHER *EVP_aes_192_ocb(void);
# endif
const EVP_CIPHER *EVP_aes_256_ecb(void);
const EVP_CIPHER *EVP_aes_256_cbc(void);
const EVP_CIPHER *EVP_aes_256_cfb1(void);
const EVP_CIPHER *EVP_aes_256_cfb8(void);
const EVP_CIPHER *EVP_aes_256_cfb128(void);
# define EVP_aes_256_cfb EVP_aes_256_cfb128
const EVP_CIPHER *EVP_aes_256_ofb(void);
const EVP_CIPHER *EVP_aes_256_ctr(void);
const EVP_CIPHER *EVP_aes_256_ccm(void);
const EVP_CIPHER *EVP_aes_256_gcm(void);
const EVP_CIPHER *EVP_aes_256_xts(void);
const EVP_CIPHER *EVP_aes_256_wrap(void);
const EVP_CIPHER *EVP_aes_256_wrap_pad(void);
# ifndef OPENSSL_NO_OCB
const EVP_CIPHER *EVP_aes_256_ocb(void);
# endif
const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void);
const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void);
const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha256(void);
const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha256(void);
# ifndef OPENSSL_NO_SIV
const EVP_CIPHER *EVP_aes_128_siv(void);
const EVP_CIPHER *EVP_aes_192_siv(void);
const EVP_CIPHER *EVP_aes_256_siv(void);
# endif
# ifndef OPENSSL_NO_ARIA
const EVP_CIPHER *EVP_aria_128_ecb(void);
const EVP_CIPHER *EVP_aria_128_cbc(void);
const EVP_CIPHER *EVP_aria_128_cfb1(void);
const EVP_CIPHER *EVP_aria_128_cfb8(void);
const EVP_CIPHER *EVP_aria_128_cfb128(void);
#  define EVP_aria_128_cfb EVP_aria_128_cfb128
const EVP_CIPHER *EVP_aria_128_ctr(void);
const EVP_CIPHER *EVP_aria_128_ofb(void);
const EVP_CIPHER *EVP_aria_128_gcm(void);
const EVP_CIPHER *EVP_aria_128_ccm(void);
const EVP_CIPHER *EVP_aria_192_ecb(void);
const EVP_CIPHER *EVP_aria_192_cbc(void);
const EVP_CIPHER *EVP_aria_192_cfb1(void);
const EVP_CIPHER *EVP_aria_192_cfb8(void);
const EVP_CIPHER *EVP_aria_192_cfb128(void);
#  define EVP_aria_192_cfb EVP_aria_192_cfb128
const EVP_CIPHER *EVP_aria_192_ctr(void);
const EVP_CIPHER *EVP_aria_192_ofb(void);
const EVP_CIPHER *EVP_aria_192_gcm(void);
const EVP_CIPHER *EVP_aria_192_ccm(void);
const EVP_CIPHER *EVP_aria_256_ecb(void);
const EVP_CIPHER *EVP_aria_256_cbc(void);
const EVP_CIPHER *EVP_aria_256_cfb1(void);
const EVP_CIPHER *EVP_aria_256_cfb8(void);
const EVP_CIPHER *EVP_aria_256_cfb128(void);
#  define EVP_aria_256_cfb EVP_aria_256_cfb128
const EVP_CIPHER *EVP_aria_256_ctr(void);
const EVP_CIPHER *EVP_aria_256_ofb(void);
const EVP_CIPHER *EVP_aria_256_gcm(void);
const EVP_CIPHER *EVP_aria_256_ccm(void);
# endif
# ifndef OPENSSL_NO_CAMELLIA
const EVP_CIPHER *EVP_camellia_128_ecb(void);
const EVP_CIPHER *EVP_camellia_128_cbc(void);
const EVP_CIPHER *EVP_camellia_128_cfb1(void);
const EVP_CIPHER *EVP_camellia_128_cfb8(void);
const EVP_CIPHER *EVP_camellia_128_cfb128(void);
#  define EVP_camellia_128_cfb EVP_camellia_128_cfb128
const EVP_CIPHER *EVP_camellia_128_ofb(void);
const EVP_CIPHER *EVP_camellia_128_ctr(void);
const EVP_CIPHER *EVP_camellia_192_ecb(void);
const EVP_CIPHER *EVP_camellia_192_cbc(void);
const EVP_CIPHER *EVP_camellia_192_cfb1(void);
const EVP_CIPHER *EVP_camellia_192_cfb8(void);
const EVP_CIPHER *EVP_camellia_192_cfb128(void);
#  define EVP_camellia_192_cfb EVP_camellia_192_cfb128
const EVP_CIPHER *EVP_camellia_192_ofb(void);
const EVP_CIPHER *EVP_camellia_192_ctr(void);
const EVP_CIPHER *EVP_camellia_256_ecb(void);
const EVP_CIPHER *EVP_camellia_256_cbc(void);
const EVP_CIPHER *EVP_camellia_256_cfb1(void);
const EVP_CIPHER *EVP_camellia_256_cfb8(void);
const EVP_CIPHER *EVP_camellia_256_cfb128(void);
#  define EVP_camellia_256_cfb EVP_camellia_256_cfb128
const EVP_CIPHER *EVP_camellia_256_ofb(void);
const EVP_CIPHER *EVP_camellia_256_ctr(void);
# endif
# ifndef OPENSSL_NO_CHACHA
const EVP_CIPHER *EVP_chacha20(void);
#  ifndef OPENSSL_NO_POLY1305
const EVP_CIPHER *EVP_chacha20_poly1305(void);
#  endif
# endif

# ifndef OPENSSL_NO_SEED
const EVP_CIPHER *EVP_seed_ecb(void);
const EVP_CIPHER *EVP_seed_cbc(void);
const EVP_CIPHER *EVP_seed_cfb128(void);
#  define EVP_seed_cfb EVP_seed_cfb128
const EVP_CIPHER *EVP_seed_ofb(void);
# endif

# ifndef OPENSSL_NO_SM4
const EVP_CIPHER *EVP_sm4_ecb(void);
const EVP_CIPHER *EVP_sm4_cbc(void);
const EVP_CIPHER *EVP_sm4_cfb128(void);
#  define EVP_sm4_cfb EVP_sm4_cfb128
const EVP_CIPHER *EVP_sm4_ofb(void);
const EVP_CIPHER *EVP_sm4_ctr(void);
# endif

# if !OPENSSL_API_1_1_0
#  define OPENSSL_add_all_algorithms_conf() \
    OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS \
                        | OPENSSL_INIT_ADD_ALL_DIGESTS \
                        | OPENSSL_INIT_LOAD_CONFIG, NULL)
#  define OPENSSL_add_all_algorithms_noconf() \
    OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS \
                        | OPENSSL_INIT_ADD_ALL_DIGESTS, NULL)

#  ifdef OPENSSL_LOAD_CONF
#   define OpenSSL_add_all_algorithms() OPENSSL_add_all_algorithms_conf()
#  else
#   define OpenSSL_add_all_algorithms() OPENSSL_add_all_algorithms_noconf()
#  endif

#  define OpenSSL_add_all_ciphers() \
    OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS, NULL)
#  define OpenSSL_add_all_digests() \
    OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_DIGESTS, NULL)

#  define EVP_cleanup() while(0) continue
# endif

int EVP_add_cipher(const EVP_CIPHER *cipher);
int EVP_add_digest(const EVP_MD *digest);

const EVP_CIPHER *EVP_get_cipherbyname(const char *name);
const EVP_MD *EVP_get_digestbyname(const char *name);

void EVP_CIPHER_do_all(void (*fn) (const EVP_CIPHER *ciph,
                                   const char *from, const char *to, void *x),
                       void *arg);
void EVP_CIPHER_do_all_sorted(void (*fn)
                               (const EVP_CIPHER *ciph, const char *from,
                                const char *to, void *x), void *arg);
void EVP_CIPHER_do_all_ex(OPENSSL_CTX *libctx,
                          void (*fn)(EVP_CIPHER *cipher, void *arg),
                          void *arg);

void EVP_MD_do_all(void (*fn) (const EVP_MD *ciph,
                               const char *from, const char *to, void *x),
                   void *arg);
void EVP_MD_do_all_sorted(void (*fn)
                           (const EVP_MD *ciph, const char *from,
                            const char *to, void *x), void *arg);
void EVP_MD_do_all_ex(OPENSSL_CTX *libctx,
                      void (*fn)(EVP_MD *md, void *arg),
                      void *arg);

/* MAC stuff */

EVP_MAC *EVP_MAC_fetch(OPENSSL_CTX *libctx, const char *algorithm,
                       const char *properties);
int EVP_MAC_up_ref(EVP_MAC *mac);
void EVP_MAC_free(EVP_MAC *mac);
const char *EVP_MAC_name(const EVP_MAC *mac);
int EVP_MAC_is_a(const EVP_MAC *mac, const char *name);
const OSSL_PROVIDER *EVP_MAC_provider(const EVP_MAC *mac);
int EVP_MAC_get_params(EVP_MAC *mac, OSSL_PARAM params[]);

EVP_MAC_CTX *EVP_MAC_CTX_new(EVP_MAC *mac);
void EVP_MAC_CTX_free(EVP_MAC_CTX *ctx);
EVP_MAC_CTX *EVP_MAC_CTX_dup(const EVP_MAC_CTX *src);
EVP_MAC *EVP_MAC_CTX_mac(EVP_MAC_CTX *ctx);
int EVP_MAC_CTX_get_params(EVP_MAC_CTX *ctx, OSSL_PARAM params[]);
int EVP_MAC_CTX_set_params(EVP_MAC_CTX *ctx, const OSSL_PARAM params[]);

size_t EVP_MAC_size(EVP_MAC_CTX *ctx);
int EVP_MAC_init(EVP_MAC_CTX *ctx);
int EVP_MAC_update(EVP_MAC_CTX *ctx, const unsigned char *data, size_t datalen);
int EVP_MAC_final(EVP_MAC_CTX *ctx,
                  unsigned char *out, size_t *outl, size_t outsize);
const OSSL_PARAM *EVP_MAC_gettable_params(const EVP_MAC *mac);
const OSSL_PARAM *EVP_MAC_gettable_ctx_params(const EVP_MAC *mac);
const OSSL_PARAM *EVP_MAC_settable_ctx_params(const EVP_MAC *mac);

void EVP_MAC_do_all_ex(OPENSSL_CTX *libctx,
                       void (*fn)(EVP_MAC *mac, void *arg),
                       void *arg);

/* PKEY stuff */
int EVP_PKEY_decrypt_old(unsigned char *dec_key,
                         const unsigned char *enc_key, int enc_key_len,
                         EVP_PKEY *private_key);
int EVP_PKEY_encrypt_old(unsigned char *enc_key,
                         const unsigned char *key, int key_len,
                         EVP_PKEY *pub_key);
int EVP_PKEY_type(int type);
int EVP_PKEY_id(const EVP_PKEY *pkey);
int EVP_PKEY_base_id(const EVP_PKEY *pkey);
int EVP_PKEY_bits(const EVP_PKEY *pkey);
int EVP_PKEY_security_bits(const EVP_PKEY *pkey);
int EVP_PKEY_size(const EVP_PKEY *pkey);
int EVP_PKEY_set_type(EVP_PKEY *pkey, int type);
int EVP_PKEY_set_type_str(EVP_PKEY *pkey, const char *str, int len);
int EVP_PKEY_set_alias_type(EVP_PKEY *pkey, int type);
# ifndef OPENSSL_NO_ENGINE
int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *e);
ENGINE *EVP_PKEY_get0_engine(const EVP_PKEY *pkey);
# endif
int EVP_PKEY_assign(EVP_PKEY *pkey, int type, void *key);
void *EVP_PKEY_get0(const EVP_PKEY *pkey);
const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len);
# ifndef OPENSSL_NO_POLY1305
const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len);
# endif
# ifndef OPENSSL_NO_SIPHASH
const unsigned char *EVP_PKEY_get0_siphash(const EVP_PKEY *pkey, size_t *len);
# endif

# ifndef OPENSSL_NO_RSA
struct rsa_st;
int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, struct rsa_st *key);
struct rsa_st *EVP_PKEY_get0_RSA(const EVP_PKEY *pkey);
struct rsa_st *EVP_PKEY_get1_RSA(EVP_PKEY *pkey);
# endif
# ifndef OPENSSL_NO_DSA
struct dsa_st;
int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, struct dsa_st *key);
struct dsa_st *EVP_PKEY_get0_DSA(const EVP_PKEY *pkey);
struct dsa_st *EVP_PKEY_get1_DSA(EVP_PKEY *pkey);
# endif
# ifndef OPENSSL_NO_DH
struct dh_st;
int EVP_PKEY_set1_DH(EVP_PKEY *pkey, struct dh_st *key);
struct dh_st *EVP_PKEY_get0_DH(const EVP_PKEY *pkey);
struct dh_st *EVP_PKEY_get1_DH(EVP_PKEY *pkey);
# endif
# ifndef OPENSSL_NO_EC
struct ec_key_st;
int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, struct ec_key_st *key);
struct ec_key_st *EVP_PKEY_get0_EC_KEY(const EVP_PKEY *pkey);
struct ec_key_st *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey);
# endif

EVP_PKEY *EVP_PKEY_new(void);
int EVP_PKEY_up_ref(EVP_PKEY *pkey);
void EVP_PKEY_free(EVP_PKEY *pkey);

EVP_PKEY *d2i_PublicKey(int type, EVP_PKEY **a, const unsigned char **pp,
                        long length);
int i2d_PublicKey(const EVP_PKEY *a, unsigned char **pp);

EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
                         long length);
EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
                             long length);
int i2d_PrivateKey(const EVP_PKEY *a, unsigned char **pp);

int i2d_KeyParams(const EVP_PKEY *a, unsigned char **pp);
EVP_PKEY *d2i_KeyParams(int type, EVP_PKEY **a, const unsigned char **pp,
                        long length);
int i2d_KeyParams_bio(BIO *bp, const EVP_PKEY *pkey);
EVP_PKEY *d2i_KeyParams_bio(int type, EVP_PKEY **a, BIO *in);

int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from);
int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey);
int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode);
int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b);

int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b);

int EVP_PKEY_print_public(BIO *out, const EVP_PKEY *pkey,
                          int indent, ASN1_PCTX *pctx);
int EVP_PKEY_print_private(BIO *out, const EVP_PKEY *pkey,
                           int indent, ASN1_PCTX *pctx);
int EVP_PKEY_print_params(BIO *out, const EVP_PKEY *pkey,
                          int indent, ASN1_PCTX *pctx);

int EVP_PKEY_get_default_digest_nid(EVP_PKEY *pkey, int *pnid);
int EVP_PKEY_supports_digest_nid(EVP_PKEY *pkey, int nid);

int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *pkey,
                                   const unsigned char *pt, size_t ptlen);
size_t EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY *pkey, unsigned char **ppt);

int EVP_CIPHER_type(const EVP_CIPHER *ctx);

/* calls methods */
int EVP_CIPHER_param_to_asn1(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
int EVP_CIPHER_asn1_to_param(EVP_CIPHER_CTX *c, ASN1_TYPE *type);

/* These are used by EVP_CIPHER methods */
int EVP_CIPHER_set_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type);
int EVP_CIPHER_get_asn1_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type);

/* PKCS5 password based encryption */
int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
                       ASN1_TYPE *param, const EVP_CIPHER *cipher,
                       const EVP_MD *md, int en_de);
int PKCS5_PBKDF2_HMAC_SHA1(const char *pass, int passlen,
                           const unsigned char *salt, int saltlen, int iter,
                           int keylen, unsigned char *out);
int PKCS5_PBKDF2_HMAC(const char *pass, int passlen,
                      const unsigned char *salt, int saltlen, int iter,
                      const EVP_MD *digest, int keylen, unsigned char *out);
int PKCS5_v2_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
                          ASN1_TYPE *param, const EVP_CIPHER *cipher,
                          const EVP_MD *md, int en_de);

#ifndef OPENSSL_NO_SCRYPT
int EVP_PBE_scrypt(const char *pass, size_t passlen,
                   const unsigned char *salt, size_t saltlen,
                   uint64_t N, uint64_t r, uint64_t p, uint64_t maxmem,
                   unsigned char *key, size_t keylen);

int PKCS5_v2_scrypt_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
                             int passlen, ASN1_TYPE *param,
                             const EVP_CIPHER *c, const EVP_MD *md, int en_de);
#endif

void PKCS5_PBE_add(void);

int EVP_PBE_CipherInit(ASN1_OBJECT *pbe_obj, const char *pass, int passlen,
                       ASN1_TYPE *param, EVP_CIPHER_CTX *ctx, int en_de);

/* PBE type */

/* Can appear as the outermost AlgorithmIdentifier */
# define EVP_PBE_TYPE_OUTER      0x0
/* Is an PRF type OID */
# define EVP_PBE_TYPE_PRF        0x1
/* Is a PKCS#5 v2.0 KDF */
# define EVP_PBE_TYPE_KDF        0x2

int EVP_PBE_alg_add_type(int pbe_type, int pbe_nid, int cipher_nid,
                         int md_nid, EVP_PBE_KEYGEN *keygen);
int EVP_PBE_alg_add(int nid, const EVP_CIPHER *cipher, const EVP_MD *md,
                    EVP_PBE_KEYGEN *keygen);
int EVP_PBE_find(int type, int pbe_nid, int *pcnid, int *pmnid,
                 EVP_PBE_KEYGEN **pkeygen);
void EVP_PBE_cleanup(void);
int EVP_PBE_get(int *ptype, int *ppbe_nid, size_t num);

# define ASN1_PKEY_ALIAS         0x1
# define ASN1_PKEY_DYNAMIC       0x2
# define ASN1_PKEY_SIGPARAM_NULL 0x4

# define ASN1_PKEY_CTRL_PKCS7_SIGN       0x1
# define ASN1_PKEY_CTRL_PKCS7_ENCRYPT    0x2
# define ASN1_PKEY_CTRL_DEFAULT_MD_NID   0x3
# define ASN1_PKEY_CTRL_CMS_SIGN         0x5
# define ASN1_PKEY_CTRL_CMS_ENVELOPE     0x7
# define ASN1_PKEY_CTRL_CMS_RI_TYPE      0x8

# define ASN1_PKEY_CTRL_SET1_TLS_ENCPT   0x9
# define ASN1_PKEY_CTRL_GET1_TLS_ENCPT   0xa
# define ASN1_PKEY_CTRL_SUPPORTS_MD_NID  0xb

int EVP_PKEY_asn1_get_count(void);
const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_get0(int idx);
const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find(ENGINE **pe, int type);
const EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_find_str(ENGINE **pe,
                                                   const char *str, int len);
int EVP_PKEY_asn1_add0(const EVP_PKEY_ASN1_METHOD *ameth);
int EVP_PKEY_asn1_add_alias(int to, int from);
int EVP_PKEY_asn1_get0_info(int *ppkey_id, int *pkey_base_id,
                            int *ppkey_flags, const char **pinfo,
                            const char **ppem_str,
                            const EVP_PKEY_ASN1_METHOD *ameth);

const EVP_PKEY_ASN1_METHOD *EVP_PKEY_get0_asn1(const EVP_PKEY *pkey);
EVP_PKEY_ASN1_METHOD *EVP_PKEY_asn1_new(int id, int flags,
                                        const char *pem_str,
                                        const char *info);
void EVP_PKEY_asn1_copy(EVP_PKEY_ASN1_METHOD *dst,
                        const EVP_PKEY_ASN1_METHOD *src);
void EVP_PKEY_asn1_free(EVP_PKEY_ASN1_METHOD *ameth);
void EVP_PKEY_asn1_set_public(EVP_PKEY_ASN1_METHOD *ameth,
                              int (*pub_decode) (EVP_PKEY *pk,
                                                 X509_PUBKEY *pub),
                              int (*pub_encode) (X509_PUBKEY *pub,
                                                 const EVP_PKEY *pk),
                              int (*pub_cmp) (const EVP_PKEY *a,
                                              const EVP_PKEY *b),
                              int (*pub_print) (BIO *out,
                                                const EVP_PKEY *pkey,
                                                int indent, ASN1_PCTX *pctx),
                              int (*pkey_size) (const EVP_PKEY *pk),
                              int (*pkey_bits) (const EVP_PKEY *pk));
void EVP_PKEY_asn1_set_private(EVP_PKEY_ASN1_METHOD *ameth,
                               int (*priv_decode) (EVP_PKEY *pk,
                                                   const PKCS8_PRIV_KEY_INFO
                                                   *p8inf),
                               int (*priv_encode) (PKCS8_PRIV_KEY_INFO *p8,
                                                   const EVP_PKEY *pk),
                               int (*priv_print) (BIO *out,
                                                  const EVP_PKEY *pkey,
                                                  int indent,
                                                  ASN1_PCTX *pctx));
void EVP_PKEY_asn1_set_param(EVP_PKEY_ASN1_METHOD *ameth,
                             int (*param_decode) (EVP_PKEY *pkey,
                                                  const unsigned char **pder,
                                                  int derlen),
                             int (*param_encode) (const EVP_PKEY *pkey,
                                                  unsigned char **pder),
                             int (*param_missing) (const EVP_PKEY *pk),
                             int (*param_copy) (EVP_PKEY *to,
                                                const EVP_PKEY *from),
                             int (*param_cmp) (const EVP_PKEY *a,
                                               const EVP_PKEY *b),
                             int (*param_print) (BIO *out,
                                                 const EVP_PKEY *pkey,
                                                 int indent,
                                                 ASN1_PCTX *pctx));

void EVP_PKEY_asn1_set_free(EVP_PKEY_ASN1_METHOD *ameth,
                            void (*pkey_free) (EVP_PKEY *pkey));
void EVP_PKEY_asn1_set_ctrl(EVP_PKEY_ASN1_METHOD *ameth,
                            int (*pkey_ctrl) (EVP_PKEY *pkey, int op,
                                              long arg1, void *arg2));
void EVP_PKEY_asn1_set_item(EVP_PKEY_ASN1_METHOD *ameth,
                            int (*item_verify) (EVP_MD_CTX *ctx,
                                                const ASN1_ITEM *it,
                                                void *asn,
                                                X509_ALGOR *a,
                                                ASN1_BIT_STRING *sig,
                                                EVP_PKEY *pkey),
                            int (*item_sign) (EVP_MD_CTX *ctx,
                                              const ASN1_ITEM *it,
                                              void *asn,
                                              X509_ALGOR *alg1,
                                              X509_ALGOR *alg2,
                                              ASN1_BIT_STRING *sig));

void EVP_PKEY_asn1_set_siginf(EVP_PKEY_ASN1_METHOD *ameth,
                              int (*siginf_set) (X509_SIG_INFO *siginf,
                                                 const X509_ALGOR *alg,
                                                 const ASN1_STRING *sig));

void EVP_PKEY_asn1_set_check(EVP_PKEY_ASN1_METHOD *ameth,
                             int (*pkey_check) (const EVP_PKEY *pk));

void EVP_PKEY_asn1_set_public_check(EVP_PKEY_ASN1_METHOD *ameth,
                                    int (*pkey_pub_check) (const EVP_PKEY *pk));

void EVP_PKEY_asn1_set_param_check(EVP_PKEY_ASN1_METHOD *ameth,
                                   int (*pkey_param_check) (const EVP_PKEY *pk));

void EVP_PKEY_asn1_set_set_priv_key(EVP_PKEY_ASN1_METHOD *ameth,
                                    int (*set_priv_key) (EVP_PKEY *pk,
                                                         const unsigned char
                                                            *priv,
                                                         size_t len));
void EVP_PKEY_asn1_set_set_pub_key(EVP_PKEY_ASN1_METHOD *ameth,
                                   int (*set_pub_key) (EVP_PKEY *pk,
                                                       const unsigned char *pub,
                                                       size_t len));
void EVP_PKEY_asn1_set_get_priv_key(EVP_PKEY_ASN1_METHOD *ameth,
                                    int (*get_priv_key) (const EVP_PKEY *pk,
                                                         unsigned char *priv,
                                                         size_t *len));
void EVP_PKEY_asn1_set_get_pub_key(EVP_PKEY_ASN1_METHOD *ameth,
                                   int (*get_pub_key) (const EVP_PKEY *pk,
                                                       unsigned char *pub,
                                                       size_t *len));

void EVP_PKEY_asn1_set_security_bits(EVP_PKEY_ASN1_METHOD *ameth,
                                     int (*pkey_security_bits) (const EVP_PKEY
                                                                *pk));

int EVP_PKEY_CTX_get_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD **md);
int EVP_PKEY_CTX_set_signature_md(EVP_PKEY_CTX *ctx, const EVP_MD *md);

# define EVP_PKEY_OP_UNDEFINED           0
# define EVP_PKEY_OP_PARAMGEN            (1<<1)
# define EVP_PKEY_OP_KEYGEN              (1<<2)
# define EVP_PKEY_OP_SIGN                (1<<3)
# define EVP_PKEY_OP_VERIFY              (1<<4)
# define EVP_PKEY_OP_VERIFYRECOVER       (1<<5)
# define EVP_PKEY_OP_SIGNCTX             (1<<6)
# define EVP_PKEY_OP_VERIFYCTX           (1<<7)
# define EVP_PKEY_OP_ENCRYPT             (1<<8)
# define EVP_PKEY_OP_DECRYPT             (1<<9)
# define EVP_PKEY_OP_DERIVE              (1<<10)

# define EVP_PKEY_OP_TYPE_SIG    \
        (EVP_PKEY_OP_SIGN | EVP_PKEY_OP_VERIFY | EVP_PKEY_OP_VERIFYRECOVER \
                | EVP_PKEY_OP_SIGNCTX | EVP_PKEY_OP_VERIFYCTX)

# define EVP_PKEY_OP_TYPE_CRYPT \
        (EVP_PKEY_OP_ENCRYPT | EVP_PKEY_OP_DECRYPT)

# define EVP_PKEY_OP_TYPE_NOGEN \
        (EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT | EVP_PKEY_OP_DERIVE)

# define EVP_PKEY_OP_TYPE_GEN \
                (EVP_PKEY_OP_PARAMGEN | EVP_PKEY_OP_KEYGEN)

# define  EVP_PKEY_CTX_set_mac_key(ctx, key, len)        \
                EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_KEYGEN,  \
                                  EVP_PKEY_CTRL_SET_MAC_KEY, len, (void *)(key))

# define EVP_PKEY_CTRL_MD                1
# define EVP_PKEY_CTRL_PEER_KEY          2

# define EVP_PKEY_CTRL_PKCS7_ENCRYPT     3
# define EVP_PKEY_CTRL_PKCS7_DECRYPT     4

# define EVP_PKEY_CTRL_PKCS7_SIGN        5

# define EVP_PKEY_CTRL_SET_MAC_KEY       6

# define EVP_PKEY_CTRL_DIGESTINIT        7

/* Used by GOST key encryption in TLS */
# define EVP_PKEY_CTRL_SET_IV            8

# define EVP_PKEY_CTRL_CMS_ENCRYPT       9
# define EVP_PKEY_CTRL_CMS_DECRYPT       10
# define EVP_PKEY_CTRL_CMS_SIGN          11

# define EVP_PKEY_CTRL_CIPHER            12

# define EVP_PKEY_CTRL_GET_MD            13

# define EVP_PKEY_CTRL_SET_DIGEST_SIZE   14

# define EVP_PKEY_ALG_CTRL               0x1000

# define EVP_PKEY_FLAG_AUTOARGLEN        2
/*
 * Method handles all operations: don't assume any digest related defaults.
 */
# define EVP_PKEY_FLAG_SIGCTX_CUSTOM     4

const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type);
EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags);
void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
                             const EVP_PKEY_METHOD *meth);
void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src);
void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth);
int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth);
int EVP_PKEY_meth_remove(const EVP_PKEY_METHOD *pmeth);
size_t EVP_PKEY_meth_get_count(void);
const EVP_PKEY_METHOD *EVP_PKEY_meth_get0(size_t idx);

EVP_KEYMGMT *EVP_KEYMGMT_fetch(OPENSSL_CTX *ctx, const char *algorithm,
                               const char *properties);
int EVP_KEYMGMT_up_ref(EVP_KEYMGMT *keymgmt);
void EVP_KEYMGMT_free(EVP_KEYMGMT *keymgmt);
const OSSL_PROVIDER *EVP_KEYMGMT_provider(const EVP_KEYMGMT *keymgmt);

EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e);
EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e);
EVP_PKEY_CTX *EVP_PKEY_CTX_new_provided(const char *name,
                                        const char *propquery);
EVP_PKEY_CTX *EVP_PKEY_CTX_dup(const EVP_PKEY_CTX *ctx);
void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx);

int EVP_PKEY_CTX_get_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params);
const OSSL_PARAM *EVP_PKEY_CTX_gettable_params(EVP_PKEY_CTX *ctx);
int EVP_PKEY_CTX_set_params(EVP_PKEY_CTX *ctx, OSSL_PARAM *params);
const OSSL_PARAM *EVP_PKEY_CTX_settable_params(EVP_PKEY_CTX *ctx);
int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
                      int cmd, int p1, void *p2);
int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx, const char *type,
                          const char *value);
int EVP_PKEY_CTX_ctrl_uint64(EVP_PKEY_CTX *ctx, int keytype, int optype,
                             int cmd, uint64_t value);

int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str);
int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex);

int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md);

int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx);
void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen);

EVP_PKEY *EVP_PKEY_new_mac_key(int type, ENGINE *e,
                               const unsigned char *key, int keylen);
EVP_PKEY *EVP_PKEY_new_raw_private_key(int type, ENGINE *e,
                                       const unsigned char *priv,
                                       size_t len);
EVP_PKEY *EVP_PKEY_new_raw_public_key(int type, ENGINE *e,
                                      const unsigned char *pub,
                                      size_t len);
int EVP_PKEY_get_raw_private_key(const EVP_PKEY *pkey, unsigned char *priv,
                                 size_t *len);
int EVP_PKEY_get_raw_public_key(const EVP_PKEY *pkey, unsigned char *pub,
                                size_t *len);

EVP_PKEY *EVP_PKEY_new_CMAC_key(ENGINE *e, const unsigned char *priv,
                                size_t len, const EVP_CIPHER *cipher);

void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data);
void *EVP_PKEY_CTX_get_data(const EVP_PKEY_CTX *ctx);
EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx);

EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx);

void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data);
void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx);

void EVP_SIGNATURE_free(EVP_SIGNATURE *signature);
int EVP_SIGNATURE_up_ref(EVP_SIGNATURE *signature);
OSSL_PROVIDER *EVP_SIGNATURE_provider(const EVP_SIGNATURE *signature);
EVP_SIGNATURE *EVP_SIGNATURE_fetch(OPENSSL_CTX *ctx, const char *algorithm,
                                   const char *properties);

int EVP_PKEY_sign_init_ex(EVP_PKEY_CTX *ctx, EVP_SIGNATURE *signature);
int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx);
int EVP_PKEY_sign(EVP_PKEY_CTX *ctx,
                  unsigned char *sig, size_t *siglen,
                  const unsigned char *tbs, size_t tbslen);
int EVP_PKEY_verify_init_ex(EVP_PKEY_CTX *ctx, EVP_SIGNATURE *signature);
int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx);
int EVP_PKEY_verify(EVP_PKEY_CTX *ctx,
                    const unsigned char *sig, size_t siglen,
                    const unsigned char *tbs, size_t tbslen);
int EVP_PKEY_verify_recover_init_ex(EVP_PKEY_CTX *ctx, EVP_SIGNATURE *signature);
int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx);
int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
                            unsigned char *rout, size_t *routlen,
                            const unsigned char *sig, size_t siglen);
int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx);
int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx,
                     unsigned char *out, size_t *outlen,
                     const unsigned char *in, size_t inlen);
int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx);
int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx,
                     unsigned char *out, size_t *outlen,
                     const unsigned char *in, size_t inlen);

int EVP_PKEY_derive_init_ex(EVP_PKEY_CTX *ctx, EVP_KEYEXCH *exchange);
int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx);
int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer);
int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);

typedef int EVP_PKEY_gen_cb(EVP_PKEY_CTX *ctx);

int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx);
int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey);
int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx);
int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey);
int EVP_PKEY_check(EVP_PKEY_CTX *ctx);
int EVP_PKEY_public_check(EVP_PKEY_CTX *ctx);
int EVP_PKEY_param_check(EVP_PKEY_CTX *ctx);

void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb);
EVP_PKEY_gen_cb *EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx);

int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx);

void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
                            int (*init) (EVP_PKEY_CTX *ctx));

void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
                            int (*copy) (EVP_PKEY_CTX *dst,
                                         const EVP_PKEY_CTX *src));

void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
                               void (*cleanup) (EVP_PKEY_CTX *ctx));

void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
                                int (*paramgen_init) (EVP_PKEY_CTX *ctx),
                                int (*paramgen) (EVP_PKEY_CTX *ctx,
                                                 EVP_PKEY *pkey));

void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
                              int (*keygen_init) (EVP_PKEY_CTX *ctx),
                              int (*keygen) (EVP_PKEY_CTX *ctx,
                                             EVP_PKEY *pkey));

void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
                            int (*sign_init) (EVP_PKEY_CTX *ctx),
                            int (*sign) (EVP_PKEY_CTX *ctx,
                                         unsigned char *sig, size_t *siglen,
                                         const unsigned char *tbs,
                                         size_t tbslen));

void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
                              int (*verify_init) (EVP_PKEY_CTX *ctx),
                              int (*verify) (EVP_PKEY_CTX *ctx,
                                             const unsigned char *sig,
                                             size_t siglen,
                                             const unsigned char *tbs,
                                             size_t tbslen));

void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
                                      int (*verify_recover_init) (EVP_PKEY_CTX
                                                                  *ctx),
                                      int (*verify_recover) (EVP_PKEY_CTX
                                                             *ctx,
                                                             unsigned char
                                                             *sig,
                                                             size_t *siglen,
                                                             const unsigned
                                                             char *tbs,
                                                             size_t tbslen));

void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
                               int (*signctx_init) (EVP_PKEY_CTX *ctx,
                                                    EVP_MD_CTX *mctx),
                               int (*signctx) (EVP_PKEY_CTX *ctx,
                                               unsigned char *sig,
                                               size_t *siglen,
                                               EVP_MD_CTX *mctx));

void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
                                 int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
                                                        EVP_MD_CTX *mctx),
                                 int (*verifyctx) (EVP_PKEY_CTX *ctx,
                                                   const unsigned char *sig,
                                                   int siglen,
                                                   EVP_MD_CTX *mctx));

void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
                               int (*encrypt_init) (EVP_PKEY_CTX *ctx),
                               int (*encryptfn) (EVP_PKEY_CTX *ctx,
                                                 unsigned char *out,
                                                 size_t *outlen,
                                                 const unsigned char *in,
                                                 size_t inlen));

void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
                               int (*decrypt_init) (EVP_PKEY_CTX *ctx),
                               int (*decrypt) (EVP_PKEY_CTX *ctx,
                                               unsigned char *out,
                                               size_t *outlen,
                                               const unsigned char *in,
                                               size_t inlen));

void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
                              int (*derive_init) (EVP_PKEY_CTX *ctx),
                              int (*derive) (EVP_PKEY_CTX *ctx,
                                             unsigned char *key,
                                             size_t *keylen));

void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
                            int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
                                         void *p2),
                            int (*ctrl_str) (EVP_PKEY_CTX *ctx,
                                             const char *type,
                                             const char *value));

void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
                             int (*check) (EVP_PKEY *pkey));

void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
                                    int (*check) (EVP_PKEY *pkey));

void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
                                   int (*check) (EVP_PKEY *pkey));

void EVP_PKEY_meth_set_digest_custom(EVP_PKEY_METHOD *pmeth,
                                     int (*digest_custom) (EVP_PKEY_CTX *ctx,
                                                           EVP_MD_CTX *mctx));

void EVP_PKEY_meth_get_init(const EVP_PKEY_METHOD *pmeth,
                            int (**pinit) (EVP_PKEY_CTX *ctx));

void EVP_PKEY_meth_get_copy(const EVP_PKEY_METHOD *pmeth,
                            int (**pcopy) (EVP_PKEY_CTX *dst,
                                           const EVP_PKEY_CTX *src));

void EVP_PKEY_meth_get_cleanup(const EVP_PKEY_METHOD *pmeth,
                               void (**pcleanup) (EVP_PKEY_CTX *ctx));

void EVP_PKEY_meth_get_paramgen(const EVP_PKEY_METHOD *pmeth,
                                int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
                                int (**pparamgen) (EVP_PKEY_CTX *ctx,
                                                   EVP_PKEY *pkey));

void EVP_PKEY_meth_get_keygen(const EVP_PKEY_METHOD *pmeth,
                              int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
                              int (**pkeygen) (EVP_PKEY_CTX *ctx,
                                               EVP_PKEY *pkey));

void EVP_PKEY_meth_get_sign(const EVP_PKEY_METHOD *pmeth,
                            int (**psign_init) (EVP_PKEY_CTX *ctx),
                            int (**psign) (EVP_PKEY_CTX *ctx,
                                           unsigned char *sig, size_t *siglen,
                                           const unsigned char *tbs,
                                           size_t tbslen));

void EVP_PKEY_meth_get_verify(const EVP_PKEY_METHOD *pmeth,
                              int (**pverify_init) (EVP_PKEY_CTX *ctx),
                              int (**pverify) (EVP_PKEY_CTX *ctx,
                                               const unsigned char *sig,
                                               size_t siglen,
                                               const unsigned char *tbs,
                                               size_t tbslen));

void EVP_PKEY_meth_get_verify_recover(const EVP_PKEY_METHOD *pmeth,
                                      int (**pverify_recover_init) (EVP_PKEY_CTX
                                                                    *ctx),
                                      int (**pverify_recover) (EVP_PKEY_CTX
                                                               *ctx,
                                                               unsigned char
                                                               *sig,
                                                               size_t *siglen,
                                                               const unsigned
                                                               char *tbs,
                                                               size_t tbslen));

void EVP_PKEY_meth_get_signctx(const EVP_PKEY_METHOD *pmeth,
                               int (**psignctx_init) (EVP_PKEY_CTX *ctx,
                                                      EVP_MD_CTX *mctx),
                               int (**psignctx) (EVP_PKEY_CTX *ctx,
                                                 unsigned char *sig,
                                                 size_t *siglen,
                                                 EVP_MD_CTX *mctx));

void EVP_PKEY_meth_get_verifyctx(const EVP_PKEY_METHOD *pmeth,
                                 int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
                                                          EVP_MD_CTX *mctx),
                                 int (**pverifyctx) (EVP_PKEY_CTX *ctx,
                                                     const unsigned char *sig,
                                                     int siglen,
                                                     EVP_MD_CTX *mctx));

void EVP_PKEY_meth_get_encrypt(const EVP_PKEY_METHOD *pmeth,
                               int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
                               int (**pencryptfn) (EVP_PKEY_CTX *ctx,
                                                   unsigned char *out,
                                                   size_t *outlen,
                                                   const unsigned char *in,
                                                   size_t inlen));

void EVP_PKEY_meth_get_decrypt(const EVP_PKEY_METHOD *pmeth,
                               int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
                               int (**pdecrypt) (EVP_PKEY_CTX *ctx,
                                                 unsigned char *out,
                                                 size_t *outlen,
                                                 const unsigned char *in,
                                                 size_t inlen));

void EVP_PKEY_meth_get_derive(const EVP_PKEY_METHOD *pmeth,
                              int (**pderive_init) (EVP_PKEY_CTX *ctx),
                              int (**pderive) (EVP_PKEY_CTX *ctx,
                                               unsigned char *key,
                                               size_t *keylen));

void EVP_PKEY_meth_get_ctrl(const EVP_PKEY_METHOD *pmeth,
                            int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
                                           void *p2),
                            int (**pctrl_str) (EVP_PKEY_CTX *ctx,
                                               const char *type,
                                               const char *value));

void EVP_PKEY_meth_get_check(const EVP_PKEY_METHOD *pmeth,
                             int (**pcheck) (EVP_PKEY *pkey));

void EVP_PKEY_meth_get_public_check(const EVP_PKEY_METHOD *pmeth,
                                    int (**pcheck) (EVP_PKEY *pkey));

void EVP_PKEY_meth_get_param_check(const EVP_PKEY_METHOD *pmeth,
                                   int (**pcheck) (EVP_PKEY *pkey));

void EVP_PKEY_meth_get_digest_custom(EVP_PKEY_METHOD *pmeth,
                                     int (**pdigest_custom) (EVP_PKEY_CTX *ctx,
                                                             EVP_MD_CTX *mctx));

void EVP_KEYEXCH_free(EVP_KEYEXCH *exchange);
int EVP_KEYEXCH_up_ref(EVP_KEYEXCH *exchange);
EVP_KEYEXCH *EVP_KEYEXCH_fetch(OPENSSL_CTX *ctx, const char *algorithm,
                               const char *properties);
OSSL_PROVIDER *EVP_KEYEXCH_provider(const EVP_KEYEXCH *exchange);

void EVP_add_alg_module(void);

/*
 * Convenient helper functions to transfer string based controls.
 * The callback gets called with the parsed value.
 */
int EVP_str2ctrl(int (*cb)(void *ctx, int cmd, void *buf, size_t buflen),
                 void *ctx, int cmd, const char *value);
int EVP_hex2ctrl(int (*cb)(void *ctx, int cmd, void *buf, size_t buflen),
                 void *ctx, int cmd, const char *hex);

# ifdef  __cplusplus
}
# endif
#endif