/*
 * Copyright 1995-2021 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>

# 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

# ifndef OPENSSL_RSA_MAX_MODULUS_BITS
#  define OPENSSL_RSA_MAX_MODULUS_BITS   16384
# endif

# define RSA_3   0x3L
# define RSA_F4  0x10001L

# ifndef OPENSSL_NO_DEPRECATED_3_0
/* The types RSA and RSA_METHOD are defined in ossl_typ.h */

#  define OPENSSL_RSA_FIPS_MIN_MODULUS_BITS 2048

#  ifndef OPENSSL_RSA_SMALL_MODULUS_BITS
#   define OPENSSL_RSA_SMALL_MODULUS_BITS 3072
#  endif

/* exponent limit enforced for "large" modulus only */
#  ifndef OPENSSL_RSA_MAX_PUBEXP_BITS
#   define OPENSSL_RSA_MAX_PUBEXP_BITS    64
#  endif
/* 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
#  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
# endif /* OPENSSL_NO_DEPRECATED_3_0 */
/*
 * Does nothing. Previously this switched off constant time behaviour.
 */
# ifndef OPENSSL_NO_DEPRECATED_1_1_0
#  define RSA_FLAG_NO_CONSTTIME           0x0000
# endif
/* 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.
 */
# ifndef OPENSSL_NO_DEPRECATED_0_9_8
#  define RSA_FLAG_NO_EXP_CONSTTIME RSA_FLAG_NO_CONSTTIME
# endif

/*-
 * New with 3.0: use part of the flags to denote exact type of RSA key,
 * some of which are limited to specific signature and encryption schemes.
 * These different types share the same RSA structure, but indicate the
 * use of certain fields in that structure.
 * Currently known are:
 * RSA          - this is the "normal" unlimited RSA structure (typenum 0)
 * RSASSA-PSS   - indicates that the PSS parameters are used.
 * RSAES-OAEP   - no specific field used for the moment, but OAEP padding
 *                is expected.  (currently unused)
 *
 * 4 bits allow for 16 types
 */
# define RSA_FLAG_TYPE_MASK            0xF000
# define RSA_FLAG_TYPE_RSA             0x0000
# define RSA_FLAG_TYPE_RSASSAPSS       0x1000
# define RSA_FLAG_TYPE_RSAESOAEP       0x2000

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);

int EVP_PKEY_CTX_set_rsa_pss_saltlen(EVP_PKEY_CTX *ctx, int saltlen);
int EVP_PKEY_CTX_get_rsa_pss_saltlen(EVP_PKEY_CTX *ctx, int *saltlen);

int EVP_PKEY_CTX_set_rsa_keygen_bits(EVP_PKEY_CTX *ctx, int bits);
int EVP_PKEY_CTX_set1_rsa_keygen_pubexp(EVP_PKEY_CTX *ctx, BIGNUM *pubexp);
int EVP_PKEY_CTX_set_rsa_keygen_primes(EVP_PKEY_CTX *ctx, int primes);
int EVP_PKEY_CTX_set_rsa_pss_keygen_saltlen(EVP_PKEY_CTX *ctx, int saltlen);
# ifndef OPENSSL_NO_DEPRECATED_3_0
OSSL_DEPRECATEDIN_3_0
int EVP_PKEY_CTX_set_rsa_keygen_pubexp(EVP_PKEY_CTX *ctx, BIGNUM *pubexp);
# endif

/* 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

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);
int EVP_PKEY_CTX_set_rsa_pss_keygen_mgf1_md(EVP_PKEY_CTX *ctx, const EVP_MD *md);
int EVP_PKEY_CTX_set_rsa_pss_keygen_mgf1_md_name(EVP_PKEY_CTX *ctx,
                                                 const char *mdname);

int EVP_PKEY_CTX_set_rsa_pss_keygen_md(EVP_PKEY_CTX *ctx, const EVP_MD *md);
int EVP_PKEY_CTX_set_rsa_pss_keygen_md_name(EVP_PKEY_CTX *ctx,
                                            const char *mdname,
                                            const char *mdprops);

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_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_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)

# ifndef OPENSSL_NO_DEPRECATED_3_0
OSSL_DEPRECATEDIN_3_0 RSA *RSA_new(void);
OSSL_DEPRECATEDIN_3_0 RSA *RSA_new_method(ENGINE *engine);
OSSL_DEPRECATEDIN_3_0 int RSA_bits(const RSA *rsa);
OSSL_DEPRECATEDIN_3_0 int RSA_size(const RSA *rsa);
OSSL_DEPRECATEDIN_3_0 int RSA_security_bits(const RSA *rsa);

OSSL_DEPRECATEDIN_3_0 int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d);
OSSL_DEPRECATEDIN_3_0 int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q);
OSSL_DEPRECATEDIN_3_0 int RSA_set0_crt_params(RSA *r,
                                              BIGNUM *dmp1, BIGNUM *dmq1,
                                              BIGNUM *iqmp);
OSSL_DEPRECATEDIN_3_0 int RSA_set0_multi_prime_params(RSA *r,
                                                      BIGNUM *primes[],
                                                      BIGNUM *exps[],
                                                      BIGNUM *coeffs[],
                                                      int pnum);
OSSL_DEPRECATEDIN_3_0 void RSA_get0_key(const RSA *r,
                                        const BIGNUM **n, const BIGNUM **e,
                                        const BIGNUM **d);
OSSL_DEPRECATEDIN_3_0 void RSA_get0_factors(const RSA *r,
                                            const BIGNUM **p, const BIGNUM **q);
OSSL_DEPRECATEDIN_3_0 int RSA_get_multi_prime_extra_count(const RSA *r);
OSSL_DEPRECATEDIN_3_0 int RSA_get0_multi_prime_factors(const RSA *r,
                                                       const BIGNUM *primes[]);
OSSL_DEPRECATEDIN_3_0 void RSA_get0_crt_params(const RSA *r,
                                               const BIGNUM **dmp1,
                                               const BIGNUM **dmq1,
                                               const BIGNUM **iqmp);
OSSL_DEPRECATEDIN_3_0
int RSA_get0_multi_prime_crt_params(const RSA *r, const BIGNUM *exps[],
                                    const BIGNUM *coeffs[]);
OSSL_DEPRECATEDIN_3_0 const BIGNUM *RSA_get0_n(const RSA *d);
OSSL_DEPRECATEDIN_3_0 const BIGNUM *RSA_get0_e(const RSA *d);
OSSL_DEPRECATEDIN_3_0 const BIGNUM *RSA_get0_d(const RSA *d);
OSSL_DEPRECATEDIN_3_0 const BIGNUM *RSA_get0_p(const RSA *d);
OSSL_DEPRECATEDIN_3_0 const BIGNUM *RSA_get0_q(const RSA *d);
OSSL_DEPRECATEDIN_3_0 const BIGNUM *RSA_get0_dmp1(const RSA *r);
OSSL_DEPRECATEDIN_3_0 const BIGNUM *RSA_get0_dmq1(const RSA *r);
OSSL_DEPRECATEDIN_3_0 const BIGNUM *RSA_get0_iqmp(const RSA *r);
OSSL_DEPRECATEDIN_3_0 const RSA_PSS_PARAMS *RSA_get0_pss_params(const RSA *r);
OSSL_DEPRECATEDIN_3_0 void RSA_clear_flags(RSA *r, int flags);
OSSL_DEPRECATEDIN_3_0 int RSA_test_flags(const RSA *r, int flags);
OSSL_DEPRECATEDIN_3_0 void RSA_set_flags(RSA *r, int flags);
OSSL_DEPRECATEDIN_3_0 int RSA_get_version(RSA *r);
OSSL_DEPRECATEDIN_3_0 ENGINE *RSA_get0_engine(const RSA *r);
# endif  /* !OPENSSL_NO_DEPRECATED_3_0 */

# define EVP_RSA_gen(bits) \
    EVP_PKEY_Q_keygen(NULL, NULL, "RSA", (size_t)(0 + (bits)))

/* Deprecated version */
# ifndef OPENSSL_NO_DEPRECATED_0_9_8
OSSL_DEPRECATEDIN_0_9_8 RSA *RSA_generate_key(int bits, unsigned long e, void
                                              (*callback) (int, int, void *),
                                              void *cb_arg);
# endif

/* New version */
# ifndef OPENSSL_NO_DEPRECATED_3_0
OSSL_DEPRECATEDIN_3_0 int RSA_generate_key_ex(RSA *rsa, int bits, BIGNUM *e,
                                              BN_GENCB *cb);
/* Multi-prime version */
OSSL_DEPRECATEDIN_3_0 int RSA_generate_multi_prime_key(RSA *rsa, int bits,
                                                       int primes, BIGNUM *e,
                                                       BN_GENCB *cb);

OSSL_DEPRECATEDIN_3_0
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);
OSSL_DEPRECATEDIN_3_0 int RSA_X931_generate_key_ex(RSA *rsa, int bits,
                                                   const BIGNUM *e,
                                                   BN_GENCB *cb);

OSSL_DEPRECATEDIN_3_0 int RSA_check_key(const RSA *);
OSSL_DEPRECATEDIN_3_0 int RSA_check_key_ex(const RSA *, BN_GENCB *cb);
        /* next 4 return -1 on error */
OSSL_DEPRECATEDIN_3_0
int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to,
                       RSA *rsa, int padding);
OSSL_DEPRECATEDIN_3_0
int RSA_private_encrypt(int flen, const unsigned char *from, unsigned char *to,
                        RSA *rsa, int padding);
OSSL_DEPRECATEDIN_3_0
int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to,
                       RSA *rsa, int padding);
OSSL_DEPRECATEDIN_3_0
int RSA_private_decrypt(int flen, const unsigned char *from, unsigned char *to,
                        RSA *rsa, int padding);
OSSL_DEPRECATEDIN_3_0 void RSA_free(RSA *r);
/* "up" the RSA object's reference count */
OSSL_DEPRECATEDIN_3_0 int RSA_up_ref(RSA *r);
OSSL_DEPRECATEDIN_3_0 int RSA_flags(const RSA *r);

OSSL_DEPRECATEDIN_3_0 void RSA_set_default_method(const RSA_METHOD *meth);
OSSL_DEPRECATEDIN_3_0 const RSA_METHOD *RSA_get_default_method(void);
OSSL_DEPRECATEDIN_3_0 const RSA_METHOD *RSA_null_method(void);
OSSL_DEPRECATEDIN_3_0 const RSA_METHOD *RSA_get_method(const RSA *rsa);
OSSL_DEPRECATEDIN_3_0 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth);

/* these are the actual RSA functions */
OSSL_DEPRECATEDIN_3_0 const RSA_METHOD *RSA_PKCS1_OpenSSL(void);

DECLARE_ASN1_ENCODE_FUNCTIONS_name_attr(OSSL_DEPRECATEDIN_3_0,
                                        RSA, RSAPublicKey)
DECLARE_ASN1_ENCODE_FUNCTIONS_name_attr(OSSL_DEPRECATEDIN_3_0,
                                        RSA, RSAPrivateKey)
# endif  /* !OPENSSL_NO_DEPRECATED_3_0 */

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

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)
DECLARE_ASN1_DUP_FUNCTION(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_DEPRECATED_3_0
#  ifndef OPENSSL_NO_STDIO
OSSL_DEPRECATEDIN_3_0 int RSA_print_fp(FILE *fp, const RSA *r, int offset);
#  endif

OSSL_DEPRECATEDIN_3_0 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
 */
OSSL_DEPRECATEDIN_3_0 int RSA_sign(int type, const unsigned char *m,
                                   unsigned int m_length, unsigned char *sigret,
                                   unsigned int *siglen, RSA *rsa);
OSSL_DEPRECATEDIN_3_0 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
 */
OSSL_DEPRECATEDIN_3_0
int RSA_sign_ASN1_OCTET_STRING(int type,
                               const unsigned char *m, unsigned int m_length,
                               unsigned char *sigret, unsigned int *siglen,
                               RSA *rsa);
OSSL_DEPRECATEDIN_3_0
int RSA_verify_ASN1_OCTET_STRING(int type,
                                 const unsigned char *m, unsigned int m_length,
                                 unsigned char *sigbuf, unsigned int siglen,
                                 RSA *rsa);

OSSL_DEPRECATEDIN_3_0 int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
OSSL_DEPRECATEDIN_3_0 void RSA_blinding_off(RSA *rsa);
OSSL_DEPRECATEDIN_3_0 BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *ctx);

OSSL_DEPRECATEDIN_3_0
int RSA_padding_add_PKCS1_type_1(unsigned char *to, int tlen,
                                 const unsigned char *f, int fl);
OSSL_DEPRECATEDIN_3_0
int RSA_padding_check_PKCS1_type_1(unsigned char *to, int tlen,
                                   const unsigned char *f, int fl,
                                   int rsa_len);
OSSL_DEPRECATEDIN_3_0
int RSA_padding_add_PKCS1_type_2(unsigned char *to, int tlen,
                                 const unsigned char *f, int fl);
OSSL_DEPRECATEDIN_3_0
int RSA_padding_check_PKCS1_type_2(unsigned char *to, int tlen,
                                   const unsigned char *f, int fl,
                                   int rsa_len);
OSSL_DEPRECATEDIN_3_0 int PKCS1_MGF1(unsigned char *mask, long len,
                                     const unsigned char *seed, long seedlen,
                                     const EVP_MD *dgst);
OSSL_DEPRECATEDIN_3_0
int RSA_padding_add_PKCS1_OAEP(unsigned char *to, int tlen,
                               const unsigned char *f, int fl,
                               const unsigned char *p, int pl);
OSSL_DEPRECATEDIN_3_0
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);
OSSL_DEPRECATEDIN_3_0
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);
OSSL_DEPRECATEDIN_3_0
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);
OSSL_DEPRECATEDIN_3_0 int RSA_padding_add_none(unsigned char *to, int tlen,
                                               const unsigned char *f, int fl);
OSSL_DEPRECATEDIN_3_0 int RSA_padding_check_none(unsigned char *to, int tlen,
                                                 const unsigned char *f, int fl,
                                                 int rsa_len);
OSSL_DEPRECATEDIN_3_0 int RSA_padding_add_X931(unsigned char *to, int tlen,
                                               const unsigned char *f, int fl);
OSSL_DEPRECATEDIN_3_0 int RSA_padding_check_X931(unsigned char *to, int tlen,
                                                 const unsigned char *f, int fl,
                                                 int rsa_len);
OSSL_DEPRECATEDIN_3_0 int RSA_X931_hash_id(int nid);

OSSL_DEPRECATEDIN_3_0
int RSA_verify_PKCS1_PSS(RSA *rsa, const unsigned char *mHash,
                         const EVP_MD *Hash, const unsigned char *EM,
                         int sLen);
OSSL_DEPRECATEDIN_3_0
int RSA_padding_add_PKCS1_PSS(RSA *rsa, unsigned char *EM,
                              const unsigned char *mHash, const EVP_MD *Hash,
                              int sLen);

OSSL_DEPRECATEDIN_3_0
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);

OSSL_DEPRECATEDIN_3_0
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)
OSSL_DEPRECATEDIN_3_0 int RSA_set_ex_data(RSA *r, int idx, void *arg);
OSSL_DEPRECATEDIN_3_0 void *RSA_get_ex_data(const RSA *r, int idx);

DECLARE_ASN1_DUP_FUNCTION_name_attr(OSSL_DEPRECATEDIN_3_0, RSA, RSAPublicKey)
DECLARE_ASN1_DUP_FUNCTION_name_attr(OSSL_DEPRECATEDIN_3_0, 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

OSSL_DEPRECATEDIN_3_0 RSA_METHOD *RSA_meth_new(const char *name, int flags);
OSSL_DEPRECATEDIN_3_0 void RSA_meth_free(RSA_METHOD *meth);
OSSL_DEPRECATEDIN_3_0 RSA_METHOD *RSA_meth_dup(const RSA_METHOD *meth);
OSSL_DEPRECATEDIN_3_0 const char *RSA_meth_get0_name(const RSA_METHOD *meth);
OSSL_DEPRECATEDIN_3_0 int RSA_meth_set1_name(RSA_METHOD *meth,
                                             const char *name);
OSSL_DEPRECATEDIN_3_0 int RSA_meth_get_flags(const RSA_METHOD *meth);
OSSL_DEPRECATEDIN_3_0 int RSA_meth_set_flags(RSA_METHOD *meth, int flags);
OSSL_DEPRECATEDIN_3_0 void *RSA_meth_get0_app_data(const RSA_METHOD *meth);
OSSL_DEPRECATEDIN_3_0 int RSA_meth_set0_app_data(RSA_METHOD *meth,
                                                 void *app_data);
OSSL_DEPRECATEDIN_3_0
int (*RSA_meth_get_pub_enc(const RSA_METHOD *meth)) (int flen,
                                                     const unsigned char *from,
                                                     unsigned char *to,
                                                     RSA *rsa, int padding);
OSSL_DEPRECATEDIN_3_0
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));
OSSL_DEPRECATEDIN_3_0
int (*RSA_meth_get_pub_dec(const RSA_METHOD *meth)) (int flen,
                                                     const unsigned char *from,
                                                     unsigned char *to,
                                                     RSA *rsa, int padding);
OSSL_DEPRECATEDIN_3_0
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));
OSSL_DEPRECATEDIN_3_0
int (*RSA_meth_get_priv_enc(const RSA_METHOD *meth)) (int flen,
                                                      const unsigned char *from,
                                                      unsigned char *to,
                                                      RSA *rsa, int padding);
OSSL_DEPRECATEDIN_3_0
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));
OSSL_DEPRECATEDIN_3_0
int (*RSA_meth_get_priv_dec(const RSA_METHOD *meth)) (int flen,
                                                      const unsigned char *from,
                                                      unsigned char *to,
                                                      RSA *rsa, int padding);
OSSL_DEPRECATEDIN_3_0
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));
OSSL_DEPRECATEDIN_3_0
int (*RSA_meth_get_mod_exp(const RSA_METHOD *meth)) (BIGNUM *r0,
                                                     const BIGNUM *i,
                                                     RSA *rsa, BN_CTX *ctx);
OSSL_DEPRECATEDIN_3_0
int RSA_meth_set_mod_exp(RSA_METHOD *rsa,
                         int (*mod_exp) (BIGNUM *r0, const BIGNUM *i, RSA *rsa,
                                         BN_CTX *ctx));
OSSL_DEPRECATEDIN_3_0
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);
OSSL_DEPRECATEDIN_3_0
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));
OSSL_DEPRECATEDIN_3_0
int (*RSA_meth_get_init(const RSA_METHOD *meth)) (RSA *rsa);
OSSL_DEPRECATEDIN_3_0
int RSA_meth_set_init(RSA_METHOD *rsa, int (*init) (RSA *rsa));
OSSL_DEPRECATEDIN_3_0
int (*RSA_meth_get_finish(const RSA_METHOD *meth)) (RSA *rsa);
OSSL_DEPRECATEDIN_3_0
int RSA_meth_set_finish(RSA_METHOD *rsa, int (*finish) (RSA *rsa));
OSSL_DEPRECATEDIN_3_0
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);
OSSL_DEPRECATEDIN_3_0
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));
OSSL_DEPRECATEDIN_3_0
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);
OSSL_DEPRECATEDIN_3_0
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));
OSSL_DEPRECATEDIN_3_0
int (*RSA_meth_get_keygen(const RSA_METHOD *meth)) (RSA *rsa, int bits,
                                                    BIGNUM *e, BN_GENCB *cb);
OSSL_DEPRECATEDIN_3_0
int RSA_meth_set_keygen(RSA_METHOD *rsa,
                        int (*keygen) (RSA *rsa, int bits, BIGNUM *e,
                                       BN_GENCB *cb));
OSSL_DEPRECATEDIN_3_0
int (*RSA_meth_get_multi_prime_keygen(const RSA_METHOD *meth)) (RSA *rsa,
                                                                int bits,
                                                                int primes,
                                                                BIGNUM *e,
                                                                BN_GENCB *cb);
OSSL_DEPRECATEDIN_3_0
int RSA_meth_set_multi_prime_keygen(RSA_METHOD *meth,
                                    int (*keygen) (RSA *rsa, int bits,
                                                   int primes, BIGNUM *e,
                                                   BN_GENCB *cb));
#endif  /* !OPENSSL_NO_DEPRECATED_3_0 */

# ifdef  __cplusplus
}
# endif
#endif