/* $OpenBSD: rsa.h,v 1.58 2022/07/12 14:42:50 kn Exp $ */
/* 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_RSA_H
#define HEADER_RSA_H

#include <openssl/opensslconf.h>

#include <openssl/asn1.h>

#ifndef OPENSSL_NO_BIO
#include <openssl/bio.h>
#endif
#include <openssl/crypto.h>
#include <openssl/ossl_typ.h>
#ifndef OPENSSL_NO_DEPRECATED
#include <openssl/bn.h>
#endif

#ifdef OPENSSL_NO_RSA
#error RSA is disabled.
#endif

#ifdef  __cplusplus
extern "C" {
#endif

struct rsa_pss_params_st {
        X509_ALGOR *hashAlgorithm;
        X509_ALGOR *maskGenAlgorithm;
        ASN1_INTEGER *saltLength;
        ASN1_INTEGER *trailerField;

        /* Hash algorithm decoded from maskGenAlgorithm. */
        X509_ALGOR *maskHash;
} /* RSA_PSS_PARAMS */;

typedef struct rsa_oaep_params_st {
        X509_ALGOR *hashFunc;
        X509_ALGOR *maskGenFunc;
        X509_ALGOR *pSourceFunc;

        /* Hash algorithm decoded from maskGenFunc. */
        X509_ALGOR *maskHash;
} RSA_OAEP_PARAMS;

#ifndef OPENSSL_RSA_MAX_MODULUS_BITS
# define OPENSSL_RSA_MAX_MODULUS_BITS   16384
#endif

#ifndef OPENSSL_RSA_SMALL_MODULUS_BITS
# define OPENSSL_RSA_SMALL_MODULUS_BITS 3072
#endif
#ifndef OPENSSL_RSA_MAX_PUBEXP_BITS
# define OPENSSL_RSA_MAX_PUBEXP_BITS    64 /* exponent limit enforced for "large" modulus only */
#endif

#define RSA_3   0x3L
#define RSA_F4  0x10001L

/* Don't check pub/private match. */
#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

/*
 * This flag in the RSA_METHOD enables the new rsa_sign, rsa_verify functions.
 */
#define RSA_FLAG_SIGN_VER               0x0040

/*
 * The built-in RSA implementation uses blinding by default, but other engines
 * might not need it.
 */
#define RSA_FLAG_NO_BLINDING            0x0080

/* 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

#define EVP_PKEY_CTX_set_rsa_padding(ctx, pad) \
        RSA_pkey_ctx_ctrl(ctx, -1, EVP_PKEY_CTRL_RSA_PADDING, pad, NULL)

#define EVP_PKEY_CTX_get_rsa_padding(ctx, ppad) \
        RSA_pkey_ctx_ctrl(ctx, -1, EVP_PKEY_CTRL_GET_RSA_PADDING, 0, ppad)

#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)

#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_mgf1_md(ctx, md) \
        RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT, \
            EVP_PKEY_CTRL_RSA_MGF1_MD, 0, (void *)(md))

#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))

#define EVP_PKEY_CTX_set_rsa_oaep_md(ctx, md) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, \
            EVP_PKEY_CTRL_RSA_OAEP_MD, 0, (void *)(md))

#define EVP_PKEY_CTX_get_rsa_mgf1_md(ctx, pmd) \
        RSA_pkey_ctx_ctrl(ctx, EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT, \
            EVP_PKEY_CTRL_GET_RSA_MGF1_MD, 0, (void *)(pmd))

#define EVP_PKEY_CTX_get_rsa_oaep_md(ctx, pmd) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, \
            EVP_PKEY_CTRL_GET_RSA_OAEP_MD, 0, (void *)(pmd))

#define EVP_PKEY_CTX_set0_rsa_oaep_label(ctx, l, llen) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, \
            EVP_PKEY_CTRL_RSA_OAEP_LABEL, llen, (void *)(l))

#define EVP_PKEY_CTX_get0_rsa_oaep_label(ctx, l) \
        EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT, \
            EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL, 0, (void *)(l))

#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 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_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);

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

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

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

const RSA_METHOD *RSA_PKCS1_OpenSSL(void);
const RSA_METHOD *RSA_PKCS1_SSLeay(void);

const RSA_METHOD *RSA_null_method(void);

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

RSA *d2i_RSAPublicKey(RSA **a, const unsigned char **in, long len);
int i2d_RSAPublicKey(const RSA *a, unsigned char **out);
extern const ASN1_ITEM RSAPublicKey_it;
RSA *d2i_RSAPrivateKey(RSA **a, const unsigned char **in, long len);
int i2d_RSAPrivateKey(const RSA *a, unsigned char **out);
extern const ASN1_ITEM RSAPrivateKey_it;

RSA_PSS_PARAMS *RSA_PSS_PARAMS_new(void);
void RSA_PSS_PARAMS_free(RSA_PSS_PARAMS *a);
RSA_PSS_PARAMS *d2i_RSA_PSS_PARAMS(RSA_PSS_PARAMS **a, const unsigned char **in, long len);
int i2d_RSA_PSS_PARAMS(RSA_PSS_PARAMS *a, unsigned char **out);
extern const ASN1_ITEM RSA_PSS_PARAMS_it;

RSA_OAEP_PARAMS *RSA_OAEP_PARAMS_new(void);
void RSA_OAEP_PARAMS_free(RSA_OAEP_PARAMS *a);
RSA_OAEP_PARAMS *d2i_RSA_OAEP_PARAMS(RSA_OAEP_PARAMS **a, const unsigned char **in, long len);
int i2d_RSA_OAEP_PARAMS(RSA_OAEP_PARAMS *a, unsigned char **out);
extern const ASN1_ITEM RSA_OAEP_PARAMS_it;

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

#ifndef OPENSSL_NO_BIO
int RSA_print(BIO *bp, const RSA *r, int offset);
#endif

/* 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_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);

int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
    CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);
int RSA_set_ex_data(RSA *r, int idx, void *arg);
void *RSA_get_ex_data(const RSA *r, int idx);

int RSA_security_bits(const RSA *rsa);

void RSA_get0_key(const RSA *r, const BIGNUM **n, const BIGNUM **e,
    const BIGNUM **d);
int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d);
void RSA_get0_crt_params(const RSA *r, const BIGNUM **dmp1, const BIGNUM **dmq1,
    const BIGNUM **iqmp);
int RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp);
void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q);
int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q);
const BIGNUM *RSA_get0_n(const RSA *r);
const BIGNUM *RSA_get0_e(const RSA *r);
const BIGNUM *RSA_get0_d(const RSA *r);
const BIGNUM *RSA_get0_p(const RSA *r);
const BIGNUM *RSA_get0_q(const RSA *r);
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);

RSA *RSAPublicKey_dup(RSA *rsa);
RSA *RSAPrivateKey_dup(RSA *rsa);

/* 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);
int RSA_meth_set1_name(RSA_METHOD *meth, const char *name);
int RSA_meth_set_priv_enc(RSA_METHOD *meth, int (*priv_enc)(int flen,
    const unsigned char *from, unsigned char *to, RSA *rsa, int padding));
int RSA_meth_set_priv_dec(RSA_METHOD *meth, int (*priv_dec)(int flen,
    const unsigned char *from, unsigned char *to, RSA *rsa, int padding));
int (*RSA_meth_get_finish(const RSA_METHOD *meth))(RSA *rsa);
int RSA_meth_set_finish(RSA_METHOD *meth, int (*finish)(RSA *rsa));
int RSA_meth_set_pub_enc(RSA_METHOD *meth, int (*pub_enc)(int flen,
    const unsigned char *from, unsigned char *to, RSA *rsa, int padding));
int RSA_meth_set_pub_dec(RSA_METHOD *meth, int (*pub_dec)(int flen,
    const unsigned char *from, unsigned char *to, RSA *rsa, int padding));
int RSA_meth_set_mod_exp(RSA_METHOD *meth, int (*mod_exp)(BIGNUM *r0,
    const BIGNUM *i, RSA *rsa, BN_CTX *ctx));
int RSA_meth_set_bn_mod_exp(RSA_METHOD *meth, 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_set_init(RSA_METHOD *meth, int (*init)(RSA *rsa));
int RSA_meth_set_keygen(RSA_METHOD *meth, int (*keygen)(RSA *rsa, int bits,
    BIGNUM *e, BN_GENCB *cb));
int RSA_meth_set_flags(RSA_METHOD *meth, int flags);
int RSA_meth_set0_app_data(RSA_METHOD *meth, void *app_data);
const char *RSA_meth_get0_name(const RSA_METHOD *);
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_get_pub_dec(const RSA_METHOD *meth))(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_get_priv_dec(const RSA_METHOD *meth))(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_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_get_init(const RSA_METHOD *meth))(RSA *rsa);
int (*RSA_meth_get_keygen(const RSA_METHOD *meth))(RSA *rsa, int bits, BIGNUM *e,
    BN_GENCB *cb);
int RSA_meth_get_flags(const RSA_METHOD *meth);
void *RSA_meth_get0_app_data(const RSA_METHOD *meth);
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));


void ERR_load_RSA_strings(void);

/* Error codes for the RSA functions. */

/* Function codes. */
#define RSA_F_CHECK_PADDING_MD                           140
#define RSA_F_DO_RSA_PRINT                               146
#define RSA_F_INT_RSA_VERIFY                             145
#define RSA_F_MEMORY_LOCK                                100
#define RSA_F_OLD_RSA_PRIV_DECODE                        147
#define RSA_F_PKEY_RSA_CTRL                              143
#define RSA_F_PKEY_RSA_CTRL_STR                          144
#define RSA_F_PKEY_RSA_SIGN                              142
#define RSA_F_PKEY_RSA_VERIFY                            154
#define RSA_F_PKEY_RSA_VERIFYRECOVER                     141
#define RSA_F_RSA_BUILTIN_KEYGEN                         129
#define RSA_F_RSA_CHECK_KEY                              123
#define RSA_F_RSA_EAY_MOD_EXP                            157
#define RSA_F_RSA_EAY_PRIVATE_DECRYPT                    101
#define RSA_F_RSA_EAY_PRIVATE_ENCRYPT                    102
#define RSA_F_RSA_EAY_PUBLIC_DECRYPT                     103
#define RSA_F_RSA_EAY_PUBLIC_ENCRYPT                     104
#define RSA_F_RSA_GENERATE_KEY                           105
#define RSA_F_RSA_GENERATE_KEY_EX                        155
#define RSA_F_RSA_ITEM_VERIFY                            156
#define RSA_F_RSA_MEMORY_LOCK                            130
#define RSA_F_RSA_NEW_METHOD                             106
#define RSA_F_RSA_NULL                                   124
#define RSA_F_RSA_NULL_MOD_EXP                           131
#define RSA_F_RSA_NULL_PRIVATE_DECRYPT                   132
#define RSA_F_RSA_NULL_PRIVATE_ENCRYPT                   133
#define RSA_F_RSA_NULL_PUBLIC_DECRYPT                    134
#define RSA_F_RSA_NULL_PUBLIC_ENCRYPT                    135
#define RSA_F_RSA_PADDING_ADD_NONE                       107
#define RSA_F_RSA_PADDING_ADD_PKCS1_OAEP                 121
#define RSA_F_RSA_PADDING_ADD_PKCS1_PSS                  125
#define RSA_F_RSA_PADDING_ADD_PKCS1_PSS_MGF1             148
#define RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_1               108
#define RSA_F_RSA_PADDING_ADD_PKCS1_TYPE_2               109
#define RSA_F_RSA_PADDING_ADD_X931                       127
#define RSA_F_RSA_PADDING_CHECK_NONE                     111
#define RSA_F_RSA_PADDING_CHECK_PKCS1_OAEP               122
#define RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_1             112
#define RSA_F_RSA_PADDING_CHECK_PKCS1_TYPE_2             113
#define RSA_F_RSA_PADDING_CHECK_X931                     128
#define RSA_F_RSA_PRINT                                  115
#define RSA_F_RSA_PRINT_FP                               116
#define RSA_F_RSA_PRIVATE_DECRYPT                        150
#define RSA_F_RSA_PRIVATE_ENCRYPT                        151
#define RSA_F_RSA_PRIV_DECODE                            137
#define RSA_F_RSA_PRIV_ENCODE                            138
#define RSA_F_RSA_PUBLIC_DECRYPT                         152
#define RSA_F_RSA_PUBLIC_ENCRYPT                         153
#define RSA_F_RSA_PUB_DECODE                             139
#define RSA_F_RSA_SETUP_BLINDING                         136
#define RSA_F_RSA_SIGN                                   117
#define RSA_F_RSA_SIGN_ASN1_OCTET_STRING                 118
#define RSA_F_RSA_VERIFY                                 119
#define RSA_F_RSA_VERIFY_ASN1_OCTET_STRING               120
#define RSA_F_RSA_VERIFY_PKCS1_PSS                       126
#define RSA_F_RSA_VERIFY_PKCS1_PSS_MGF1                  149

/* Reason codes. */
#define RSA_R_ALGORITHM_MISMATCH                         100
#define RSA_R_BAD_E_VALUE                                101
#define RSA_R_BAD_FIXED_HEADER_DECRYPT                   102
#define RSA_R_BAD_PAD_BYTE_COUNT                         103
#define RSA_R_BAD_SIGNATURE                              104
#define RSA_R_BLOCK_TYPE_IS_NOT_01                       106
#define RSA_R_BLOCK_TYPE_IS_NOT_02                       107
#define RSA_R_DATA_GREATER_THAN_MOD_LEN                  108
#define RSA_R_DATA_TOO_LARGE                             109
#define RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE                110
#define RSA_R_DATA_TOO_LARGE_FOR_MODULUS                 132
#define RSA_R_DATA_TOO_SMALL                             111
#define RSA_R_DATA_TOO_SMALL_FOR_KEY_SIZE                122
#define RSA_R_DIGEST_DOES_NOT_MATCH                      158
#define RSA_R_DIGEST_NOT_ALLOWED                         145
#define RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY                 112
#define RSA_R_DMP1_NOT_CONGRUENT_TO_D                    124
#define RSA_R_DMQ1_NOT_CONGRUENT_TO_D                    125
#define RSA_R_D_E_NOT_CONGRUENT_TO_1                     123
#define RSA_R_FIRST_OCTET_INVALID                        133
#define RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE        144
#define RSA_R_INVALID_DIGEST                             157
#define RSA_R_INVALID_DIGEST_LENGTH                      143
#define RSA_R_INVALID_HEADER                             137
#define RSA_R_INVALID_KEYBITS                            145
#define RSA_R_INVALID_LABEL                              160
#define RSA_R_INVALID_MESSAGE_LENGTH                     131
#define RSA_R_INVALID_MGF1_MD                            156
#define RSA_R_INVALID_OAEP_PARAMETERS                    161
#define RSA_R_INVALID_PADDING                            138
#define RSA_R_INVALID_PADDING_MODE                       141
#define RSA_R_INVALID_PSS_PARAMETERS                     149
#define RSA_R_INVALID_PSS_SALTLEN                        146
#define RSA_R_INVALID_SALT_LENGTH                        150
#define RSA_R_INVALID_TRAILER                            139
#define RSA_R_INVALID_X931_DIGEST                        142
#define RSA_R_IQMP_NOT_INVERSE_OF_Q                      126
#define RSA_R_KEY_SIZE_TOO_SMALL                         120
#define RSA_R_LAST_OCTET_INVALID                         134
#define RSA_R_MODULUS_TOO_LARGE                          105
#define RSA_R_MGF1_DIGEST_NOT_ALLOWED                    152
#define RSA_R_NON_FIPS_RSA_METHOD                        157
#define RSA_R_NO_PUBLIC_EXPONENT                         140
#define RSA_R_NULL_BEFORE_BLOCK_MISSING                  113
#define RSA_R_N_DOES_NOT_EQUAL_P_Q                       127
#define RSA_R_OAEP_DECODING_ERROR                        121
#define RSA_R_OPERATION_NOT_ALLOWED_IN_FIPS_MODE         158
#define RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE   148
#define RSA_R_PADDING_CHECK_FAILED                       114
#define RSA_R_PSS_SALTLEN_TOO_SMALL                      164
#define RSA_R_P_NOT_PRIME                                128
#define RSA_R_Q_NOT_PRIME                                129
#define RSA_R_RSA_OPERATIONS_NOT_SUPPORTED               130
#define RSA_R_SLEN_CHECK_FAILED                          136
#define RSA_R_SLEN_RECOVERY_FAILED                       135
#define RSA_R_SSLV3_ROLLBACK_ATTACK                      115
#define RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD 116
#define RSA_R_UNKNOWN_ALGORITHM_TYPE                     117
#define RSA_R_UNKNOWN_DIGEST                             166
#define RSA_R_UNKNOWN_MASK_DIGEST                        151
#define RSA_R_UNKNOWN_PADDING_TYPE                       118
#define RSA_R_UNKNOWN_PSS_DIGEST                         152
#define RSA_R_UNSUPPORTED_ENCRYPTION_TYPE                162
#define RSA_R_UNSUPPORTED_LABEL_SOURCE                   163
#define RSA_R_UNSUPPORTED_MASK_ALGORITHM                 153
#define RSA_R_UNSUPPORTED_MASK_PARAMETER                 154
#define RSA_R_UNSUPPORTED_SIGNATURE_TYPE                 155
#define RSA_R_VALUE_MISSING                              147
#define RSA_R_WRONG_SIGNATURE_LENGTH                     119

#ifdef  __cplusplus
}
#endif
#endif