/*

 * 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_RSA_H

# define OPENSSL_RSA_H

# pragma once

# include <openssl/macros.h>

# ifndef OPENSSL_NO_DEPRECATED_3_0

#  define HEADER_RSA_H

# endif

# include <openssl/opensslconf.h>

# ifndef OPENSSL_NO_RSA

# include <openssl/asn1.h>

# include <openssl/bio.h>

# include <openssl/crypto.h>

# include <openssl/types.h>

# ifndef OPENSSL_NO_DEPRECATED_1_1_0

#  include <openssl/bn.h>

# endif

# include <openssl/rsaerr.h>

# include <openssl/safestack.h>

# ifdef  __cplusplus

extern "C" {

# endif

/* The types RSA and RSA_METHOD are defined in ossl_typ.h */

# ifndef OPENSSL_RSA_MAX_MODULUS_BITS

#  define OPENSSL_RSA_MAX_MODULUS_BITS   16384

# endif

# define OPENSSL_RSA_FIPS_MIN_MODULUS_BITS 1024

# ifndef OPENSSL_RSA_SMALL_MODULUS_BITS

#  define OPENSSL_RSA_SMALL_MODULUS_BITS 3072

# endif

# ifndef OPENSSL_RSA_MAX_PUBEXP_BITS

/* exponent limit enforced for "large" modulus only */

#  define OPENSSL_RSA_MAX_PUBEXP_BITS    64

# endif

# define RSA_3   0x3L

# define RSA_F4  0x10001L

/* based on RFC 8017 appendix A.1.2 */

# define RSA_ASN1_VERSION_DEFAULT        0

# define RSA_ASN1_VERSION_MULTI          1

# define RSA_DEFAULT_PRIME_NUM           2

# define RSA_METHOD_FLAG_NO_CHECK        0x0001/* don't check pub/private

                                                * match */

# define RSA_FLAG_CACHE_PUBLIC           0x0002

# define RSA_FLAG_CACHE_PRIVATE          0x0004

# define RSA_FLAG_BLINDING               0x0008

# define RSA_FLAG_THREAD_SAFE            0x0010

/*

 * This flag means the private key operations will be handled by rsa_mod_exp

 * and that they do not depend on the private key components being present:

 * for example a key stored in external hardware. Without this flag

 * bn_mod_exp gets called when private key components are absent.

 */

# define RSA_FLAG_EXT_PKEY               0x0020

/*

 * new with 0.9.6j and 0.9.7b; the built-in

 * RSA implementation now uses blinding by

 * default (ignoring RSA_FLAG_BLINDING),

 * but other engines might not need it

 */

# define RSA_FLAG_NO_BLINDING            0x0080

# ifndef OPENSSL_NO_DEPRECATED_1_1_0

/*

 * Does nothing. Previously this switched off constant time behaviour.

 */

#  define RSA_FLAG_NO_CONSTTIME           0x0000

# endif

# ifndef OPENSSL_NO_DEPRECATED_0_9_8

/* deprecated name for the flag*/

/*

 * new with 0.9.7h; the built-in RSA

 * implementation now uses constant time

 * modular exponentiation for secret exponents

 * by default. This flag causes the

 * faster variable sliding window method to

 * be used for all exponents.

 */

#  define RSA_FLAG_NO_EXP_CONSTTIME RSA_FLAG_NO_CONSTTIME

# endif

int EVP_PKEY_CTX_set_rsa_padding(EVP_PKEY_CTX *ctx, int pad_mode);

int EVP_PKEY_CTX_get_rsa_padding(EVP_PKEY_CTX *ctx, int *pad_mode);

# define EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx, len) \

        RSA_pkey_ctx_ctrl(ctx, (EVP_PKEY_OP_SIGN|EVP_PKEY_OP_VERIFY), \

                          EVP_PKEY_CTRL_RSA_PSS_SALTLEN, len, NULL)

/* Salt length matches digest */

# define RSA_PSS_SALTLEN_DIGEST -1

/* Verify only: auto detect salt length */

# define RSA_PSS_SALTLEN_AUTO   -2

/* Set salt length to maximum possible */

# define RSA_PSS_SALTLEN_MAX    -3

/* Old compatible max salt length for sign only */

# define RSA_PSS_SALTLEN_MAX_SIGN    -2

# define EVP_PKEY_CTX_set_rsa_pss_keygen_saltlen(ctx, len) \

        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA_PSS, EVP_PKEY_OP_KEYGEN, \

                          EVP_PKEY_CTRL_RSA_PSS_SALTLEN, len, NULL)

# define EVP_PKEY_CTX_get_rsa_pss_saltlen(ctx, plen) \

        RSA_pkey_ctx_ctrl(ctx, (EVP_PKEY_OP_SIGN|EVP_PKEY_OP_VERIFY), \

                          EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN, 0, plen)

# define EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, bits) \

        RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_KEYGEN, \

                          EVP_PKEY_CTRL_RSA_KEYGEN_BITS, bits, NULL)

# define EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx, pubexp) \

        RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_KEYGEN, \

                          EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP, 0, pubexp)

# define EVP_PKEY_CTX_set_rsa_keygen_primes(ctx, primes) \

        RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_KEYGEN, \

                          EVP_PKEY_CTRL_RSA_KEYGEN_PRIMES, primes, NULL)

int EVP_PKEY_CTX_set_rsa_mgf1_md(EVP_PKEY_CTX *ctx, const EVP_MD *md);

int EVP_PKEY_CTX_set_rsa_mgf1_md_name(EVP_PKEY_CTX *ctx, const char *mdname,

                                      const char *mdprops);

int EVP_PKEY_CTX_get_rsa_mgf1_md(EVP_PKEY_CTX *ctx, const EVP_MD **md);

int EVP_PKEY_CTX_get_rsa_mgf1_md_name(EVP_PKEY_CTX *ctx, char *name,

                                      size_t namelen);

# define  EVP_PKEY_CTX_set_rsa_pss_keygen_mgf1_md(ctx, md) \

        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA_PSS, EVP_PKEY_OP_KEYGEN, \

                          EVP_PKEY_CTRL_RSA_MGF1_MD, 0, (void *)(md))

int EVP_PKEY_CTX_set_rsa_oaep_md(EVP_PKEY_CTX *ctx, const EVP_MD *md);

int EVP_PKEY_CTX_set_rsa_oaep_md_name(EVP_PKEY_CTX *ctx, const char *mdname,

                                      const char *mdprops);

int EVP_PKEY_CTX_get_rsa_oaep_md(EVP_PKEY_CTX *ctx, const EVP_MD **md);

int EVP_PKEY_CTX_get_rsa_oaep_md_name(EVP_PKEY_CTX *ctx, char *name,

                                      size_t namelen);

int EVP_PKEY_CTX_set0_rsa_oaep_label(EVP_PKEY_CTX *ctx, void *label,

                                     int llen);

int EVP_PKEY_CTX_get0_rsa_oaep_label(EVP_PKEY_CTX *ctx, unsigned char **label);

# define  EVP_PKEY_CTX_set_rsa_pss_keygen_md(ctx, md) \

        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA_PSS,  \

                          EVP_PKEY_OP_KEYGEN, EVP_PKEY_CTRL_MD,  \

                          0, (void *)(md))

# define EVP_PKEY_CTRL_RSA_PADDING       (EVP_PKEY_ALG_CTRL + 1)

# define EVP_PKEY_CTRL_RSA_PSS_SALTLEN   (EVP_PKEY_ALG_CTRL + 2)

# define EVP_PKEY_CTRL_RSA_KEYGEN_BITS   (EVP_PKEY_ALG_CTRL + 3)

# define EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP (EVP_PKEY_ALG_CTRL + 4)

# define EVP_PKEY_CTRL_RSA_MGF1_MD       (EVP_PKEY_ALG_CTRL + 5)

# define EVP_PKEY_CTRL_GET_RSA_PADDING           (EVP_PKEY_ALG_CTRL + 6)

# define EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN       (EVP_PKEY_ALG_CTRL + 7)

# define EVP_PKEY_CTRL_GET_RSA_MGF1_MD           (EVP_PKEY_ALG_CTRL + 8)

# define EVP_PKEY_CTRL_RSA_OAEP_MD       (EVP_PKEY_ALG_CTRL + 9)

# define EVP_PKEY_CTRL_RSA_OAEP_LABEL    (EVP_PKEY_ALG_CTRL + 10)

# define EVP_PKEY_CTRL_GET_RSA_OAEP_MD   (EVP_PKEY_ALG_CTRL + 11)

# define EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL (EVP_PKEY_ALG_CTRL + 12)

# define EVP_PKEY_CTRL_RSA_KEYGEN_PRIMES  (EVP_PKEY_ALG_CTRL + 13)

# define RSA_PKCS1_PADDING          1

# define RSA_SSLV23_PADDING         2

# define RSA_NO_PADDING             3

# define RSA_PKCS1_OAEP_PADDING     4

# define RSA_X931_PADDING           5

/* EVP_PKEY_ only */

# define RSA_PKCS1_PSS_PADDING      6

# define RSA_PKCS1_WITH_TLS_PADDING 7

# define RSA_PKCS1_PADDING_SIZE  11

# define RSA_set_app_data(s,arg)         RSA_set_ex_data(s,0,arg)

# define RSA_get_app_data(s)             RSA_get_ex_data(s,0)

RSA *RSA_new(void);

RSA *RSA_new_method(ENGINE *engine);

int RSA_bits(const RSA *rsa);

int RSA_size(const RSA *rsa);

int RSA_security_bits(const RSA *rsa);

int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d);

int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q);

int RSA_set0_crt_params(RSA *r,BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp);

int RSA_set0_multi_prime_params(RSA *r, BIGNUM *primes[], BIGNUM *exps[],

                                BIGNUM *coeffs[], int pnum);

void RSA_get0_key(const RSA *r,

                  const BIGNUM **n, const BIGNUM **e, const BIGNUM **d);

void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q);

int RSA_get_multi_prime_extra_count(const RSA *r);

int RSA_get0_multi_prime_factors(const RSA *r, const BIGNUM *primes[]);

void RSA_get0_crt_params(const RSA *r,

                         const BIGNUM **dmp1, const BIGNUM **dmq1,

                         const BIGNUM **iqmp);

int RSA_get0_multi_prime_crt_params(const RSA *r, const BIGNUM *exps[],

                                    const BIGNUM *coeffs[]);

const BIGNUM *RSA_get0_n(const RSA *d);

const BIGNUM *RSA_get0_e(const RSA *d);

const BIGNUM *RSA_get0_d(const RSA *d);

const BIGNUM *RSA_get0_p(const RSA *d);

const BIGNUM *RSA_get0_q(const RSA *d);

const BIGNUM *RSA_get0_dmp1(const RSA *r);

const BIGNUM *RSA_get0_dmq1(const RSA *r);

const BIGNUM *RSA_get0_iqmp(const RSA *r);

const RSA_PSS_PARAMS *RSA_get0_pss_params(const RSA *r);

void RSA_clear_flags(RSA *r, int flags);

int RSA_test_flags(const RSA *r, int flags);

void RSA_set_flags(RSA *r, int flags);

int RSA_get_version(RSA *r);

ENGINE *RSA_get0_engine(const RSA *r);

/* Deprecated version */

DEPRECATEDIN_0_9_8(RSA *RSA_generate_key(int bits, unsigned long e, void

                                         (*callback) (int, int, void *),

                                         void *cb_arg))

/* New version */

int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);

/* Multi-prime version */

int RSA_generate_multi_prime_key(RSA *rsa, int bits, int primes,

                                 BIGNUM *e, BN_GENCB *cb);

int RSA_X931_derive_ex(RSA *rsa, BIGNUM *p1, BIGNUM *p2, BIGNUM *q1,

                       BIGNUM *q2, const BIGNUM *Xp1, const BIGNUM *Xp2,

                       const BIGNUM *Xp, const BIGNUM *Xq1, const BIGNUM *Xq2,

                       const BIGNUM *Xq, const BIGNUM *e, BN_GENCB *cb);

int RSA_X931_generate_key_ex(RSA *rsa, int bits, const BIGNUM *e,

                             BN_GENCB *cb);

int RSA_check_key(const RSA *);

int RSA_check_key_ex(const RSA *, BN_GENCB *cb);

        /* next 4 return -1 on error */

int RSA_public_encrypt(int flen, const unsigned char *from,

                       unsigned char *to, RSA *rsa, int padding);

int RSA_private_encrypt(int flen, const unsigned char *from,

                        unsigned char *to, RSA *rsa, int padding);

int RSA_public_decrypt(int flen, const unsigned char *from,

                       unsigned char *to, RSA *rsa, int padding);

int RSA_private_decrypt(int flen, const unsigned char *from,

                        unsigned char *to, RSA *rsa, int padding);

void RSA_free(RSA *r);

/* "up" the RSA object's reference count */

int RSA_up_ref(RSA *r);

int RSA_flags(const RSA *r);

void RSA_set_default_method(const RSA_METHOD *meth);

const RSA_METHOD *RSA_get_default_method(void);

const RSA_METHOD *RSA_null_method(void);

const RSA_METHOD *RSA_get_method(const RSA *rsa);

int RSA_set_method(RSA *rsa, const RSA_METHOD *meth);

/* these are the actual RSA functions */

const RSA_METHOD *RSA_PKCS1_OpenSSL(void);

int RSA_pkey_ctx_ctrl(EVP_PKEY_CTX *ctx, int optype, int cmd, int p1, void *p2);

DECLARE_ASN1_ENCODE_FUNCTIONS_name(RSA, RSAPublicKey)

DECLARE_ASN1_ENCODE_FUNCTIONS_name(RSA, RSAPrivateKey)

struct rsa_pss_params_st {

    X509_ALGOR *hashAlgorithm;

    X509_ALGOR *maskGenAlgorithm;

    ASN1_INTEGER *saltLength;

    ASN1_INTEGER *trailerField;

    /* Decoded hash algorithm from maskGenAlgorithm */

    X509_ALGOR *maskHash;

};

DECLARE_ASN1_FUNCTIONS(RSA_PSS_PARAMS)

typedef struct rsa_oaep_params_st {

    X509_ALGOR *hashFunc;

    X509_ALGOR *maskGenFunc;

    X509_ALGOR *pSourceFunc;

    /* Decoded hash algorithm from maskGenFunc */

    X509_ALGOR *maskHash;

} RSA_OAEP_PARAMS;

DECLARE_ASN1_FUNCTIONS(RSA_OAEP_PARAMS)

# ifndef OPENSSL_NO_STDIO

int RSA_print_fp(FILE *fp, const RSA *r, int offset);

# endif

int RSA_print(BIO *bp, const RSA *r, int offset);

/*

 * The following 2 functions sign and verify a X509_SIG ASN1 object inside

 * PKCS#1 padded RSA encryption

 */

int RSA_sign(int type, const unsigned char *m, unsigned int m_length,

             unsigned char *sigret, unsigned int *siglen, RSA *rsa);

int RSA_verify(int type, const unsigned char *m, unsigned int m_length,

               const unsigned char *sigbuf, unsigned int siglen, RSA *rsa);

/*

 * The following 2 function sign and verify a ASN1_OCTET_STRING object inside

 * PKCS#1 padded RSA encryption

 */

int RSA_sign_ASN1_OCTET_STRING(int type,

                               const unsigned char *m, unsigned int m_length,

                               unsigned char *sigret, unsigned int *siglen,

                               RSA *rsa);

int RSA_verify_ASN1_OCTET_STRING(int type, const unsigned char *m,

                                 unsigned int m_length, unsigned char *sigbuf,

                                 unsigned int siglen, RSA *rsa);

int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);

void RSA_blinding_off(RSA *rsa);

BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *ctx);

int RSA_padding_add_PKCS1_type_1(unsigned char *to, int tlen,

                                 const unsigned char *f, int fl);

int RSA_padding_check_PKCS1_type_1(unsigned char *to, int tlen,

                                   const unsigned char *f, int fl,

                                   int rsa_len);

int RSA_padding_add_PKCS1_type_2(unsigned char *to, int tlen,

                                 const unsigned char *f, int fl);

int RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,

                                   const unsigned char *f, int fl,

                                   int rsa_len);

int PKCS1_MGF1(unsigned char *mask, long len, const unsigned char *seed,

               long seedlen, const EVP_MD *dgst);

int RSA_padding_add_PKCS1_OAEP(unsigned char *to, int tlen,

                               const unsigned char *f, int fl,

                               const unsigned char *p, int pl);

int RSA_padding_check_PKCS1_OAEP(unsigned char *to, int tlen,

                                 const unsigned char *f, int fl, int rsa_len,

                                 const unsigned char *p, int pl);

int RSA_padding_add_PKCS1_OAEP_mgf1(unsigned char *to, int tlen,

                                    const unsigned char *from, int flen,

                                    const unsigned char *param, int plen,

                                    const EVP_MD *md, const EVP_MD *mgf1md);

int RSA_padding_check_PKCS1_OAEP_mgf1(unsigned char *to, int tlen,

                                      const unsigned char *from, int flen,

                                      int num, const unsigned char *param,

                                      int plen, const EVP_MD *md,

                                      const EVP_MD *mgf1md);

int RSA_padding_add_SSLv23(unsigned char *to, int tlen,

                           const unsigned char *f, int fl);

int RSA_padding_check_SSLv23(unsigned char *to, int tlen,

                             const unsigned char *f, int fl, int rsa_len);

int RSA_padding_add_none(unsigned char *to, int tlen, const unsigned char *f,

                         int fl);

int RSA_padding_check_none(unsigned char *to, int tlen,

                           const unsigned char *f, int fl, int rsa_len);

int RSA_padding_add_X931(unsigned char *to, int tlen, const unsigned char *f,

                         int fl);

int RSA_padding_check_X931(unsigned char *to, int tlen,

                           const unsigned char *f, int fl, int rsa_len);

int RSA_X931_hash_id(int nid);

int RSA_verify_PKCS1_PSS(RSA *rsa, const unsigned char *mHash,

                         const EVP_MD *Hash, const unsigned char *EM,

                         int sLen);

int RSA_padding_add_PKCS1_PSS(RSA *rsa, unsigned char *EM,

                              const unsigned char *mHash, const EVP_MD *Hash,

                              int sLen);

int RSA_verify_PKCS1_PSS_mgf1(RSA *rsa, const unsigned char *mHash,

                              const EVP_MD *Hash, const EVP_MD *mgf1Hash,

                              const unsigned char *EM, int sLen);

int RSA_padding_add_PKCS1_PSS_mgf1(RSA *rsa, unsigned char *EM,

                                   const unsigned char *mHash,

                                   const EVP_MD *Hash, const EVP_MD *mgf1Hash,

                                   int sLen);

#define RSA_get_ex_new_index(l, p, newf, dupf, freef) \

    CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, l, p, newf, dupf, freef)

int RSA_set_ex_data(RSA *r, int idx, void *arg);

void *RSA_get_ex_data(const RSA *r, int idx);

DECLARE_ASN1_DUP_FUNCTION_name(RSA, RSAPublicKey)

DECLARE_ASN1_DUP_FUNCTION_name(RSA, RSAPrivateKey)

/*

 * If this flag is set the RSA method is FIPS compliant and can be used in

 * FIPS mode. This is set in the validated module method. If an application

 * sets this flag in its own methods it is its responsibility to ensure the

 * result is compliant.

 */

# define RSA_FLAG_FIPS_METHOD                    0x0400

/*

 * If this flag is set the operations normally disabled in FIPS mode are

 * permitted it is then the applications responsibility to ensure that the

 * usage is compliant.

 */

# define RSA_FLAG_NON_FIPS_ALLOW                 0x0400

/*

 * Application has decided PRNG is good enough to generate a key: don't

 * check.

 */

# define RSA_FLAG_CHECKED                        0x0800

RSA_METHOD *RSA_meth_new(const char *name, int flags);

void RSA_meth_free(RSA_METHOD *meth);

RSA_METHOD *RSA_meth_dup(const RSA_METHOD *meth);

const char *RSA_meth_get0_name(const RSA_METHOD *meth);

int RSA_meth_set1_name(RSA_METHOD *meth, const char *name);

int RSA_meth_get_flags(const RSA_METHOD *meth);

int RSA_meth_set_flags(RSA_METHOD *meth, int flags);

void *RSA_meth_get0_app_data(const RSA_METHOD *meth);

int RSA_meth_set0_app_data(RSA_METHOD *meth, void *app_data);

int (*RSA_meth_get_pub_enc(const RSA_METHOD *meth))

    (int flen, const unsigned char *from,

     unsigned char *to, RSA *rsa, int padding);

int RSA_meth_set_pub_enc(RSA_METHOD *rsa,

                         int (*pub_enc) (int flen, const unsigned char *from,

                                         unsigned char *to, RSA *rsa,

                                         int padding));

int (*RSA_meth_get_pub_dec(const RSA_METHOD *meth))

    (int flen, const unsigned char *from,

     unsigned char *to, RSA *rsa, int padding);

int RSA_meth_set_pub_dec(RSA_METHOD *rsa,

                         int (*pub_dec) (int flen, const unsigned char *from,

                                         unsigned char *to, RSA *rsa,

                                         int padding));

int (*RSA_meth_get_priv_enc(const RSA_METHOD *meth))

    (int flen, const unsigned char *from,

     unsigned char *to, RSA *rsa, int padding);

int RSA_meth_set_priv_enc(RSA_METHOD *rsa,

                          int (*priv_enc) (int flen, const unsigned char *from,

                                           unsigned char *to, RSA *rsa,

                                           int padding));

int (*RSA_meth_get_priv_dec(const RSA_METHOD *meth))

    (int flen, const unsigned char *from,

     unsigned char *to, RSA *rsa, int padding);

int RSA_meth_set_priv_dec(RSA_METHOD *rsa,

                          int (*priv_dec) (int flen, const unsigned char *from,

                                           unsigned char *to, RSA *rsa,

                                           int padding));

int (*RSA_meth_get_mod_exp(const RSA_METHOD *meth))

    (BIGNUM *r0, const BIGNUM *i, RSA *rsa, BN_CTX *ctx);

int RSA_meth_set_mod_exp(RSA_METHOD *rsa,

                         int (*mod_exp) (BIGNUM *r0, const BIGNUM *i, RSA *rsa,

                                         BN_CTX *ctx));

int (*RSA_meth_get_bn_mod_exp(const RSA_METHOD *meth))

    (BIGNUM *r, const BIGNUM *a, const BIGNUM *p,

     const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);

int RSA_meth_set_bn_mod_exp(RSA_METHOD *rsa,

                            int (*bn_mod_exp) (BIGNUM *r,

                                               const BIGNUM *a,

                                               const BIGNUM *p,

                                               const BIGNUM *m,

                                               BN_CTX *ctx,

                                               BN_MONT_CTX *m_ctx));

int (*RSA_meth_get_init(const RSA_METHOD *meth)) (RSA *rsa);

int RSA_meth_set_init(RSA_METHOD *rsa, int (*init) (RSA *rsa));

int (*RSA_meth_get_finish(const RSA_METHOD *meth)) (RSA *rsa);

int RSA_meth_set_finish(RSA_METHOD *rsa, int (*finish) (RSA *rsa));

int (*RSA_meth_get_sign(const RSA_METHOD *meth))

    (int type,

     const unsigned char *m, unsigned int m_length,

     unsigned char *sigret, unsigned int *siglen,

     const RSA *rsa);

int RSA_meth_set_sign(RSA_METHOD *rsa,

                      int (*sign) (int type, const unsigned char *m,

                                   unsigned int m_length,

                                   unsigned char *sigret, unsigned int *siglen,

                                   const RSA *rsa));

int (*RSA_meth_get_verify(const RSA_METHOD *meth))

    (int dtype, const unsigned char *m,

     unsigned int m_length, const unsigned char *sigbuf,

     unsigned int siglen, const RSA *rsa);

int RSA_meth_set_verify(RSA_METHOD *rsa,

                        int (*verify) (int dtype, const unsigned char *m,

                                       unsigned int m_length,

                                       const unsigned char *sigbuf,

                                       unsigned int siglen, const RSA *rsa));

int (*RSA_meth_get_keygen(const RSA_METHOD *meth))

    (RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);

int RSA_meth_set_keygen(RSA_METHOD *rsa,

                        int (*keygen) (RSA *rsa, int bits, BIGNUM *e,

                                       BN_GENCB *cb));

int (*RSA_meth_get_multi_prime_keygen(const RSA_METHOD *meth))

    (RSA *rsa, int bits, int primes, BIGNUM *e, BN_GENCB *cb);

int RSA_meth_set_multi_prime_keygen(RSA_METHOD *meth,

                                    int (*keygen) (RSA *rsa, int bits,

                                                   int primes, BIGNUM *e,

                                                   BN_GENCB *cb));

#  ifdef  __cplusplus

}

#  endif

# endif

#endif