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    use libc::*;

    use *;

    pub type pem_password_cb = Option<
        unsafe extern "C" fn(
            buf: *mut c_char,
            size: c_int,
            rwflag: c_int,
            user_data: *mut c_void,
        ) -> c_int,
    >;

    extern "C" {
        pub fn PEM_read_bio_X509(
            bio: *mut BIO,
            out: *mut *mut X509,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut X509;
        pub fn PEM_write_bio_X509(bio: *mut BIO, x509: *mut X509) -> c_int;
        pub fn PEM_read_bio_X509_CRL(
            bio: *mut BIO,
            out: *mut *mut X509_CRL,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut X509_CRL;
        pub fn PEM_write_bio_X509_CRL(bio: *mut BIO, x509: *mut X509_CRL) -> c_int;
        pub fn PEM_read_bio_X509_REQ(
            bio: *mut BIO,
            out: *mut *mut X509_REQ,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut X509_REQ;
        pub fn PEM_write_bio_X509_REQ(bio: *mut BIO, x509: *mut X509_REQ) -> c_int;
        pub fn PEM_read_bio_RSAPrivateKey(
            bio: *mut BIO,
            rsa: *mut *mut RSA,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut RSA;
        pub fn PEM_write_bio_RSAPrivateKey(
            bp: *mut BIO,
            rsa: *mut RSA,
            cipher: *const EVP_CIPHER,
            kstr: *mut c_uchar,
            klen: c_int,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> c_int;
        pub fn PEM_read_bio_RSAPublicKey(
            bio: *mut BIO,
            rsa: *mut *mut RSA,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut RSA;
        pub fn PEM_write_bio_RSAPublicKey(bp: *mut BIO, rsa: *const RSA) -> c_int;
        pub fn PEM_read_bio_RSA_PUBKEY(
            bio: *mut BIO,
            rsa: *mut *mut RSA,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut RSA;
        pub fn PEM_write_bio_RSA_PUBKEY(bp: *mut BIO, rsa: *mut RSA) -> c_int;
        pub fn PEM_read_bio_DSAPrivateKey(
            bp: *mut BIO,
            dsa: *mut *mut DSA,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut DSA;
        pub fn PEM_write_bio_DSAPrivateKey(
            bp: *mut BIO,
            dsa: *mut DSA,
            cipher: *const EVP_CIPHER,
            kstr: *mut c_uchar,
            klen: c_int,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> c_int;
        pub fn PEM_read_bio_DSA_PUBKEY(
            bp: *mut BIO,
            dsa: *mut *mut DSA,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut DSA;
        pub fn PEM_write_bio_DSA_PUBKEY(bp: *mut BIO, dsa: *mut DSA) -> c_int;
        pub fn PEM_read_bio_ECPrivateKey(
            bio: *mut BIO,
            key: *mut *mut EC_KEY,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut EC_KEY;
        pub fn PEM_write_bio_ECPrivateKey(
            bio: *mut BIO,
            key: *mut EC_KEY,
            cipher: *const EVP_CIPHER,
            kstr: *mut c_uchar,
            klen: c_int,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> c_int;
        pub fn PEM_read_bio_EC_PUBKEY(
            bp: *mut BIO,
            ec: *mut *mut EC_KEY,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut EC_KEY;
        pub fn PEM_write_bio_EC_PUBKEY(bp: *mut BIO, ec: *mut EC_KEY) -> c_int;
        pub fn PEM_read_bio_DHparams(
            bio: *mut BIO,
            out: *mut *mut DH,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut DH;
        pub fn PEM_write_bio_DHparams(bio: *mut BIO, x: *const DH) -> c_int;
        pub fn PEM_read_bio_PrivateKey(
            bio: *mut BIO,
            out: *mut *mut EVP_PKEY,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut EVP_PKEY;
        pub fn PEM_write_bio_PrivateKey(
            bio: *mut BIO,
            pkey: *mut EVP_PKEY,
            cipher: *const EVP_CIPHER,
            kstr: *mut c_uchar,
            klen: c_int,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> c_int;
        pub fn PEM_read_bio_PUBKEY(
            bio: *mut BIO,
            out: *mut *mut EVP_PKEY,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut EVP_PKEY;
        pub fn PEM_write_bio_PUBKEY(bp: *mut BIO, x: *mut EVP_PKEY) -> c_int;

        pub fn PEM_write_bio_PKCS8PrivateKey(
            bio: *mut BIO,
            pkey: *mut EVP_PKEY,
            cipher: *const EVP_CIPHER,
            kstr: *mut c_char,
            klen: c_int,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> c_int;
        pub fn d2i_PKCS8PrivateKey_bio(
            bp: *mut BIO,
            x: *mut *mut EVP_PKEY,
            cb: pem_password_cb,
            u: *mut c_void,
        ) -> *mut EVP_PKEY;
        pub fn d2i_PKCS8_PRIV_KEY_INFO(
            k: *mut *mut PKCS8_PRIV_KEY_INFO,
            buf: *mut *const u8,
            length: c_long,
        ) -> *mut PKCS8_PRIV_KEY_INFO;
        pub fn PKCS8_PRIV_KEY_INFO_free(p8inf: *mut PKCS8_PRIV_KEY_INFO);

        pub fn PEM_read_bio_PKCS7(
            bio: *mut BIO,
            out: *mut *mut PKCS7,
            cb: pem_password_cb,
            u: *mut c_void,
        ) -> *mut PKCS7;

        pub fn PEM_write_bio_PKCS7(bp: *mut BIO, x: *mut PKCS7) -> c_int;

        #[cfg(ossl101)]
        pub fn PEM_read_bio_CMS(
            bio: *mut BIO,
            out: *mut *mut CMS_ContentInfo,
            callback: pem_password_cb,
            user_data: *mut c_void,
        ) -> *mut CMS_ContentInfo;
        #[cfg(ossl101)]
        pub fn PEM_write_bio_CMS(bio: *mut BIO, cms: *const CMS_ContentInfo) -> c_int;
    }

    pub const PEM_R_NO_START_LINE: c_int = 108;