evp.h

/* crypto/evp/evp.h */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#ifndef HEADER_ENVELOPE_H
# define HEADER_ENVELOPE_H

# ifdef OPENSSL_ALGORITHM_DEFINES
#  include <openssl/opensslconf.h>
# else
#  define OPENSSL_ALGORITHM_DEFINES
#  include <openssl/opensslconf.h>
#  undef OPENSSL_ALGORITHM_DEFINES
# endif

# include <openssl/ossl_typ.h>

# include <openssl/symhacks.h>

# include <openssl/bio.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_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_HMAC   NID_hmac
# define EVP_PKEY_CMAC   NID_cmac

#ifdef  __cplusplus
extern "C" {
#endif

/*
 * Type needs to be a bit field Sub-type needs to be for variations on the
 * method, as in, can it do arbitrary encryption....
 */
struct evp_pkey_st {
    int type;
    int save_type;
    int references;
    const EVP_PKEY_ASN1_METHOD *ameth;
    ENGINE *engine;
    union {
        char *ptr;
# ifndef OPENSSL_NO_RSA
        struct rsa_st *rsa;     /* RSA */
# endif
# ifndef OPENSSL_NO_DSA
        struct dsa_st *dsa;     /* DSA */
# endif
# ifndef OPENSSL_NO_DH
        struct dh_st *dh;       /* DH */
# endif
# ifndef OPENSSL_NO_EC
        struct ec_key_st *ec;   /* ECC */
# endif
    } pkey;
    int save_parameters;
    STACK_OF(X509_ATTRIBUTE) *attributes; /* [ 0 ] */
} /* EVP_PKEY */ ;

# 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

/* 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

/* 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_cleanup */
/*
 * 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

struct evp_cipher_st {
    int nid;
    int block_size;
    /* Default value for variable length ciphers */
    int key_len;
    int iv_len;
    /* Various flags */
    unsigned long flags;
    /* init key */
    int (*init) (EVP_CIPHER_CTX *ctx, const unsigned char *key,
                 const unsigned char *iv, int enc);
    /* encrypt/decrypt data */
    int (*do_cipher) (EVP_CIPHER_CTX *ctx, unsigned char *out,
                      const unsigned char *in, size_t inl);
    /* cleanup ctx */
    int (*cleanup) (EVP_CIPHER_CTX *);
    /* how big ctx->cipher_data needs to be */
    int ctx_size;
    /* Populate a ASN1_TYPE with parameters */
    int (*set_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
    /* Get parameters from a ASN1_TYPE */
    int (*get_asn1_parameters) (EVP_CIPHER_CTX *, ASN1_TYPE *);
    /* Miscellaneous operations */
    int (*ctrl) (EVP_CIPHER_CTX *, int type, int arg, void *ptr);
    /* Application data */
    void *app_data;
} /* EVP_CIPHER */ ;

/* 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_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
/* Allow use default ASN1 get/set iv */
# define         EVP_CIPH_FLAG_DEFAULT_ASN1      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 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

/* 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

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

struct evp_cipher_ctx_st {
    const EVP_CIPHER *cipher;
    ENGINE *engine;             /* functional reference if 'cipher' is
                                 * ENGINE-provided */
    int encrypt;                /* encrypt or decrypt */
    int buf_len;                /* number we have left */
    unsigned char oiv[EVP_MAX_IV_LENGTH]; /* original iv */
    unsigned char iv[EVP_MAX_IV_LENGTH]; /* working iv */
    unsigned char buf[EVP_MAX_BLOCK_LENGTH]; /* saved partial block */
    int num;                    /* used by cfb/ofb/ctr mode */
    void *app_data;             /* application stuff */
    int key_len;                /* May change for variable length cipher */
    unsigned long flags;        /* Various flags */
    void *cipher_data;          /* per EVP data */
    int final_used;
    int block_mask;
    unsigned char final[EVP_MAX_BLOCK_LENGTH]; /* possible final block */
} /* EVP_CIPHER_CTX */ ;

typedef struct evp_Encode_Ctx_st {
    /* number saved in a partial encode/decode */
    int num;
    /*
     * The length is either the output line length (in input bytes) or the
     * shortest input line length that is ok.  Once decoding begins, the
     * length is adjusted up each time a longer line is decoded
     */
    int length;
    /* data to encode */
    unsigned char enc_data[80];
    /* number read on current line */
    int line_num;
    int expect_nl;
} EVP_ENCODE_CTX;

/* 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,\
                                        (char *)(rsa))
# endif

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

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

# ifndef OPENSSL_NO_EC
#  define EVP_PKEY_assign_EC_KEY(pkey,eckey) EVP_PKEY_assign((pkey),EVP_PKEY_EC,\
                                        (char *)(eckey))
# 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))

/* Macros to reduce FIPS dependencies: do NOT use in applications */
# define M_EVP_CIPHER_nid(e)             ((e)->nid)
# define M_EVP_CIPHER_CTX_iv_length(e)   ((e)->cipher->iv_len)
# define M_EVP_CIPHER_CTX_flags(e)       ((e)->cipher->flags)
# define M_EVP_CIPHER_CTX_block_size(e)  ((e)->cipher->block_size)
# define M_EVP_CIPHER_CTX_cipher(e)      ((e)->cipher)
# define M_EVP_CIPHER_CTX_mode(e)        (M_EVP_CIPHER_CTX_flags(e) & EVP_CIPH_MODE)

# define M_EVP_CIPHER_CTX_set_flags(ctx,flgs) ((ctx)->flags|=(flgs))

# define M_EVP_EncryptInit(ctx,ciph,key,iv) \
        (EVP_CipherInit(ctx,ciph,key,iv,1))
# define M_EVP_EncryptInit_ex(ctx,ciph,impl,key,iv) \
        (EVP_CipherInit_ex(ctx,ciph,impl,key,iv,1))
# define M_EVP_DecryptInit(ctx,ciph,key,iv) \
        (EVP_CipherInit(ctx,ciph,key,iv,0))
# define M_EVP_DecryptInit_ex(ctx,ciph,impl,key,iv) \
        (EVP_CipherInit_ex(ctx,ciph,impl,key,iv,0))

int EVP_MD_type(const EVP_MD *md);
# define EVP_MD_nid(e)                   EVP_MD_type(e)
# define EVP_MD_name(e)                  OBJ_nid2sn(EVP_MD_nid(e))
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_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_md_data(const EVP_MD_CTX *ctx);

int EVP_CIPHER_nid(const EVP_CIPHER *cipher);
# define EVP_CIPHER_name(e)              OBJ_nid2sn(EVP_CIPHER_nid(e))
int EVP_CIPHER_block_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);
# define EVP_CIPHER_mode(e)              (EVP_CIPHER_flags(e) & EVP_CIPH_MODE)

const EVP_CIPHER *EVP_CIPHER_CTX_cipher(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_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);
# define EVP_CIPHER_CTX_type(c)         EVP_CIPHER_type(EVP_CIPHER_CTX_cipher(c))
unsigned long EVP_CIPHER_CTX_flags(const EVP_CIPHER_CTX *ctx);
# define EVP_CIPHER_CTX_mode(e)          (EVP_CIPHER_CTX_flags(e) & EVP_CIPH_MODE)

# 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)
# define EVP_DigestSignUpdate(a,b,c)     EVP_DigestUpdate(a,b,c)
# define EVP_DigestVerifyUpdate(a,b,c)   EVP_DigestUpdate(a,b,c)

# 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,(char *)md)
# endif
# define BIO_get_md(b,mdp)               BIO_ctrl(b,BIO_C_GET_MD,0,(char *)mdp)
# define BIO_get_md_ctx(b,mdcp)     BIO_ctrl(b,BIO_C_GET_MD_CTX,0,(char *)mdcp)
# define BIO_set_md_ctx(b,mdcp)     BIO_ctrl(b,BIO_C_SET_MD_CTX,0,(char *)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,(char *)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_CTX_init(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_create(void);
void EVP_MD_CTX_destroy(EVP_MD_CTX *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);

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

/*__owur*/ int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
                                  const EVP_MD *type, ENGINE *e,
                                  EVP_PKEY *pkey);
__owur int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
                               size_t *siglen);

__owur int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
                                const EVP_MD *type, ENGINE *e,
                                EVP_PKEY *pkey);
__owur int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
                                 size_t siglen);

__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);

void EVP_EncodeInit(EVP_ENCODE_CTX *ctx);
void 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);

void EVP_CIPHER_CTX_init(EVP_CIPHER_CTX *a);
int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *a);
EVP_CIPHER_CTX *EVP_CIPHER_CTX_new(void);
void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *a);
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);

BIO_METHOD *BIO_f_md(void);
BIO_METHOD *BIO_f_base64(void);
BIO_METHOD *BIO_f_cipher(void);
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
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);
# 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
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
# ifndef OPENSSL_NO_AES
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);
# 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_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

void OPENSSL_add_all_algorithms_noconf(void);
void OPENSSL_add_all_algorithms_conf(void);

# 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

void OpenSSL_add_all_ciphers(void);
void OpenSSL_add_all_digests(void);

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_cleanup(void);

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_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);

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(EVP_PKEY *pkey);
int EVP_PKEY_security_bits(const EVP_PKEY *pkey);
int EVP_PKEY_size(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_assign(EVP_PKEY *pkey, int type, void *key);
void *EVP_PKEY_get0(EVP_PKEY *pkey);

# ifndef OPENSSL_NO_RSA
struct rsa_st;
int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, struct rsa_st *key);
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_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_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_get1_EC_KEY(EVP_PKEY *pkey);
# endif

EVP_PKEY *EVP_PKEY_new(void);
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(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(EVP_PKEY *a, unsigned char **pp);

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_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

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

# 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_signature_md(ctx, md) \
                EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,  \
                                        EVP_PKEY_CTRL_MD, 0, (void *)md)

# define  EVP_PKEY_CTX_get_signature_md(ctx, pmd)        \
                EVP_PKEY_CTX_ctrl(ctx, -1, EVP_PKEY_OP_TYPE_SIG,  \
                                        EVP_PKEY_CTRL_GET_MD, 0, (void *)pmd)

# 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_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);

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_dup(EVP_PKEY_CTX *ctx);
void EVP_PKEY_CTX_free(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_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);

void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data);
void *EVP_PKEY_CTX_get_data(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);

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(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(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(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);

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,
                                         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_get_init(EVP_PKEY_METHOD *pmeth,
                            int (**pinit) (EVP_PKEY_CTX *ctx));

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

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

void EVP_PKEY_meth_get_paramgen(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(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(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(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(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(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(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(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(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(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(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_add_alg_module(void);

/* BEGIN ERROR CODES */
/*
 * The following lines are auto generated by the script mkerr.pl. Any changes
 * made after this point may be overwritten when the script is next run.
 */
void ERR_load_EVP_strings(void);

/* Error codes for the EVP functions. */

/* Function codes. */
# define EVP_F_AESNI_INIT_KEY                             165
# define EVP_F_AESNI_XTS_CIPHER                           176
# define EVP_F_AES_INIT_KEY                               133
# define EVP_F_AES_T4_INIT_KEY                            178
# define EVP_F_AES_XTS                                    172
# define EVP_F_AES_XTS_CIPHER                             175
# define EVP_F_ALG_MODULE_INIT                            177
# define EVP_F_CAMELLIA_INIT_KEY                          159
# define EVP_F_CMAC_INIT                                  173
# define EVP_F_CMLL_T4_INIT_KEY                           179
# define EVP_F_D2I_PKEY                                   100
# define EVP_F_DO_SIGVER_INIT                             161
# define EVP_F_DSAPKEY2PKCS8                              134
# define EVP_F_DSA_PKEY2PKCS8                             135
# define EVP_F_ECDSA_PKEY2PKCS8                           129
# define EVP_F_ECKEY_PKEY2PKCS8                           132
# define EVP_F_EVP_CIPHERINIT_EX                          123
# define EVP_F_EVP_CIPHER_CTX_COPY                        163
# define EVP_F_EVP_CIPHER_CTX_CTRL                        124
# define EVP_F_EVP_CIPHER_CTX_SET_KEY_LENGTH              122
# define EVP_F_EVP_DECRYPTFINAL_EX                        101
# define EVP_F_EVP_DIGESTINIT_EX                          128
# define EVP_F_EVP_ENCRYPTFINAL_EX                        127
# define EVP_F_EVP_MD_CTX_COPY_EX                         110
# define EVP_F_EVP_MD_SIZE                                162
# define EVP_F_EVP_OPENINIT                               102
# define EVP_F_EVP_PBE_ALG_ADD                            115
# define EVP_F_EVP_PBE_ALG_ADD_TYPE                       160
# define EVP_F_EVP_PBE_CIPHERINIT                         116
# define EVP_F_EVP_PBE_SCRYPT                             181
# define EVP_F_EVP_PKCS82PKEY                             111
# define EVP_F_EVP_PKCS82PKEY_BROKEN                      136
# define EVP_F_EVP_PKEY2PKCS8_BROKEN                      113
# define EVP_F_EVP_PKEY_COPY_PARAMETERS                   103
# define EVP_F_EVP_PKEY_CTX_CTRL                          137
# define EVP_F_EVP_PKEY_CTX_CTRL_STR                      150
# define EVP_F_EVP_PKEY_CTX_DUP                           156
# define EVP_F_EVP_PKEY_DECRYPT                           104
# define EVP_F_EVP_PKEY_DECRYPT_INIT                      138
# define EVP_F_EVP_PKEY_DECRYPT_OLD                       151
# define EVP_F_EVP_PKEY_DERIVE                            153
# define EVP_F_EVP_PKEY_DERIVE_INIT                       154
# define EVP_F_EVP_PKEY_DERIVE_SET_PEER                   155
# define EVP_F_EVP_PKEY_ENCRYPT                           105
# define EVP_F_EVP_PKEY_ENCRYPT_INIT                      139
# define EVP_F_EVP_PKEY_ENCRYPT_OLD                       152
# define EVP_F_EVP_PKEY_GET1_DH                           119
# define EVP_F_EVP_PKEY_GET1_DSA                          120
# define EVP_F_EVP_PKEY_GET1_ECDSA                        130
# define EVP_F_EVP_PKEY_GET1_EC_KEY                       131
# define EVP_F_EVP_PKEY_GET1_RSA                          121
# define EVP_F_EVP_PKEY_KEYGEN                            146
# define EVP_F_EVP_PKEY_KEYGEN_INIT                       147
# define EVP_F_EVP_PKEY_NEW                               106
# define EVP_F_EVP_PKEY_PARAMGEN                          148
# define EVP_F_EVP_PKEY_PARAMGEN_INIT                     149
# define EVP_F_EVP_PKEY_SIGN                              140
# define EVP_F_EVP_PKEY_SIGN_INIT                         141
# define EVP_F_EVP_PKEY_VERIFY                            142
# define EVP_F_EVP_PKEY_VERIFY_INIT                       143
# define EVP_F_EVP_PKEY_VERIFY_RECOVER                    144
# define EVP_F_EVP_PKEY_VERIFY_RECOVER_INIT               145
# define EVP_F_EVP_RIJNDAEL                               126
# define EVP_F_EVP_SIGNFINAL                              107
# define EVP_F_EVP_VERIFYFINAL                            108
# define EVP_F_FIPS_CIPHERINIT                            166
# define EVP_F_FIPS_CIPHER_CTX_COPY                       170
# define EVP_F_FIPS_CIPHER_CTX_CTRL                       167
# define EVP_F_FIPS_CIPHER_CTX_SET_KEY_LENGTH             171
# define EVP_F_FIPS_DIGESTINIT                            168
# define EVP_F_FIPS_MD_CTX_COPY                           169
# define EVP_F_HMAC_INIT_EX                               174
# define EVP_F_INT_CTX_NEW                                157
# define EVP_F_PKCS5_PBE_KEYIVGEN                         117
# define EVP_F_PKCS5_V2_PBE_KEYIVGEN                      118
# define EVP_F_PKCS5_V2_PBKDF2_KEYIVGEN                   164
# define EVP_F_PKCS5_V2_SCRYPT_KEYIVGEN                   180
# define EVP_F_PKCS8_SET_BROKEN                           112
# define EVP_F_PKEY_SET_TYPE                              158
# define EVP_F_RC2_MAGIC_TO_METH                          109
# define EVP_F_RC5_CTRL                                   125

/* Reason codes. */
# define EVP_R_AES_IV_SETUP_FAILED                        162
# define EVP_R_AES_KEY_SETUP_FAILED                       143
# define EVP_R_ASN1_LIB                                   140
# define EVP_R_BAD_BLOCK_LENGTH                           136
# define EVP_R_BAD_DECRYPT                                100
# define EVP_R_BAD_KEY_LENGTH                             137
# define EVP_R_BN_DECODE_ERROR                            112
# define EVP_R_BN_PUBKEY_ERROR                            113
# define EVP_R_BUFFER_TOO_SMALL                           155
# define EVP_R_CAMELLIA_KEY_SETUP_FAILED                  157
# define EVP_R_CIPHER_PARAMETER_ERROR                     122
# define EVP_R_COMMAND_NOT_SUPPORTED                      147
# define EVP_R_CTRL_NOT_IMPLEMENTED                       132
# define EVP_R_CTRL_OPERATION_NOT_IMPLEMENTED             133
# define EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH          138
# define EVP_R_DECODE_ERROR                               114
# define EVP_R_DIFFERENT_KEY_TYPES                        101
# define EVP_R_DIFFERENT_PARAMETERS                       153
# define EVP_R_DISABLED_FOR_FIPS                          163
# define EVP_R_ENCODE_ERROR                               115
# define EVP_R_ERROR_LOADING_SECTION                      165
# define EVP_R_ERROR_SETTING_FIPS_MODE                    166
# define EVP_R_EVP_PBE_CIPHERINIT_ERROR                   119
# define EVP_R_EXPECTING_AN_RSA_KEY                       127
# define EVP_R_EXPECTING_A_DH_KEY                         128
# define EVP_R_EXPECTING_A_DSA_KEY                        129
# define EVP_R_EXPECTING_A_ECDSA_KEY                      141
# define EVP_R_EXPECTING_A_EC_KEY                         142
# define EVP_R_FIPS_MODE_NOT_SUPPORTED                    167
# define EVP_R_ILLEGAL_SCRYPT_PARAMETERS                  171
# define EVP_R_INITIALIZATION_ERROR                       134
# define EVP_R_INPUT_NOT_INITIALIZED                      111
# define EVP_R_INVALID_DIGEST                             152
# define EVP_R_INVALID_FIPS_MODE                          168
# define EVP_R_INVALID_KEY_LENGTH                         130
# define EVP_R_INVALID_OPERATION                          148
# define EVP_R_IV_TOO_LARGE                               102
# define EVP_R_KEYGEN_FAILURE                             120
# define EVP_R_MEMORY_LIMIT_EXCEEDED                      172
# define EVP_R_MESSAGE_DIGEST_IS_NULL                     159
# define EVP_R_METHOD_NOT_SUPPORTED                       144
# define EVP_R_MISSING_PARAMETERS                         103
# define EVP_R_NO_CIPHER_SET                              131
# define EVP_R_NO_DEFAULT_DIGEST                          158
# define EVP_R_NO_DIGEST_SET                              139
# define EVP_R_NO_DSA_PARAMETERS                          116
# define EVP_R_NO_KEY_SET                                 154
# define EVP_R_NO_OPERATION_SET                           149
# define EVP_R_NO_SIGN_FUNCTION_CONFIGURED                104
# define EVP_R_NO_VERIFY_FUNCTION_CONFIGURED              105
# define EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE   150
# define EVP_R_OPERATON_NOT_INITIALIZED                   151
# define EVP_R_PKCS8_UNKNOWN_BROKEN_TYPE                  117
# define EVP_R_PRIVATE_KEY_DECODE_ERROR                   145
# define EVP_R_PRIVATE_KEY_ENCODE_ERROR                   146
# define EVP_R_PUBLIC_KEY_NOT_RSA                         106
# define EVP_R_TOO_LARGE                                  164
# define EVP_R_UNKNOWN_CIPHER                             160
# define EVP_R_UNKNOWN_DIGEST                             161
# define EVP_R_UNKNOWN_OPTION                             169
# define EVP_R_UNKNOWN_PBE_ALGORITHM                      121
# define EVP_R_UNSUPORTED_NUMBER_OF_ROUNDS                135
# define EVP_R_UNSUPPORTED_ALGORITHM                      156
# define EVP_R_UNSUPPORTED_CIPHER                         107
# define EVP_R_UNSUPPORTED_KEYLENGTH                      123
# define EVP_R_UNSUPPORTED_KEY_DERIVATION_FUNCTION        124
# define EVP_R_UNSUPPORTED_KEY_SIZE                       108
# define EVP_R_UNSUPPORTED_PRF                            125
# define EVP_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM          118
# define EVP_R_UNSUPPORTED_SALT_TYPE                      126
# define EVP_R_WRAP_MODE_NOT_ALLOWED                      170
# define EVP_R_WRONG_FINAL_BLOCK_LENGTH                   109
# define EVP_R_WRONG_PUBLIC_KEY_TYPE                      110

#ifdef  __cplusplus
}
#endif
#endif