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use libc::*;
use std::ptr;

use *;

pub const RSA_F4: c_long = 0x10001;

pub const RSA_PKCS1_PADDING: c_int = 1;
pub const RSA_NO_PADDING: c_int = 3;
pub const RSA_PKCS1_OAEP_PADDING: c_int = 4;
pub const RSA_PKCS1_PSS_PADDING: c_int = 6;

extern "C" {
    pub fn RSA_new() -> *mut RSA;
    pub fn RSA_size(k: *const RSA) -> c_uint;

    pub fn EVP_PKEY_CTX_set_rsa_padding(ctx: *mut EVP_PKEY_CTX, pad: c_int) -> c_int;
    pub fn EVP_PKEY_CTX_get_rsa_padding(ctx: *mut EVP_PKEY_CTX, ppad: *mut c_int) -> c_int;
    pub fn EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx: *mut EVP_PKEY_CTX, len: c_int) -> c_int;
    pub fn EVP_PKEY_CTX_set_rsa_mgf1_md(ctx: *mut EVP_PKEY_CTX, md: *const EVP_MD) -> c_int;

    pub fn RSA_set0_key(
        r: *mut ::RSA,
        n: *mut ::BIGNUM,
        e: *mut ::BIGNUM,
        d: *mut ::BIGNUM,
    ) -> c_int;
    pub fn RSA_set0_factors(r: *mut ::RSA, p: *mut ::BIGNUM, q: *mut ::BIGNUM) -> c_int;
    pub fn RSA_set0_crt_params(
        r: *mut ::RSA,
        dmp1: *mut ::BIGNUM,
        dmq1: *mut ::BIGNUM,
        iqmp: *mut ::BIGNUM,
    ) -> c_int;
    pub fn RSA_get0_key(
        r: *const ::RSA,
        n: *mut *const ::BIGNUM,
        e: *mut *const ::BIGNUM,
        d: *mut *const ::BIGNUM,
    );
    pub fn RSA_get0_factors(r: *const ::RSA, p: *mut *const ::BIGNUM, q: *mut *const ::BIGNUM);
    pub fn RSA_get0_crt_params(
        r: *const ::RSA,
        dmp1: *mut *const ::BIGNUM,
        dmq1: *mut *const ::BIGNUM,
        iqmp: *mut *const ::BIGNUM,
    );

    pub fn RSA_generate_key_ex(
        rsa: *mut RSA,
        bits: c_int,
        e: *const BIGNUM,
        cb: *mut BN_GENCB,
    ) -> c_int;

    pub fn RSA_public_encrypt(
        flen: size_t,
        from: *const u8,
        to: *mut u8,
        k: *mut RSA,
        pad: c_int,
    ) -> c_int;
    pub fn RSA_private_encrypt(
        flen: size_t,
        from: *const u8,
        to: *mut u8,
        k: *mut RSA,
        pad: c_int,
    ) -> c_int;
    pub fn RSA_public_decrypt(
        flen: size_t,
        from: *const u8,
        to: *mut u8,
        k: *mut RSA,
        pad: c_int,
    ) -> c_int;
    pub fn RSA_private_decrypt(
        flen: size_t,
        from: *const u8,
        to: *mut u8,
        k: *mut RSA,
        pad: c_int,
    ) -> c_int;
    pub fn RSA_check_key(r: *const ::RSA) -> c_int;
    pub fn RSA_free(rsa: *mut RSA);
    pub fn RSA_up_ref(rsa: *mut RSA) -> c_int;

    pub fn i2d_RSAPublicKey(k: *const RSA, buf: *mut *mut u8) -> c_int;
    pub fn d2i_RSAPublicKey(k: *mut *mut RSA, buf: *mut *const u8, len: c_long) -> *mut RSA;
    pub fn i2d_RSAPrivateKey(k: *const RSA, buf: *mut *mut u8) -> c_int;
    pub fn d2i_RSAPrivateKey(k: *mut *mut RSA, buf: *mut *const u8, len: c_long) -> *mut RSA;

    pub fn RSA_sign(
        t: c_int,
        m: *const u8,
        mlen: c_uint,
        sig: *mut u8,
        siglen: *mut c_uint,
        k: *mut RSA,
    ) -> c_int;
    pub fn RSA_verify(
        t: c_int,
        m: *const u8,
        mlen: size_t,
        sig: *const u8,
        siglen: size_t,
        k: *mut RSA,
    ) -> c_int;
}