Function nginx::PKCS7_ISSUER_AND_SERIAL_digest

pub unsafe extern "C" fn PKCS7_ISSUER_AND_SERIAL_digest(
    data: *mut PKCS7_ISSUER_AND_SERIAL, 
    type_: *const EVP_MD, 
    md: *mut c_uchar, 
    len: *mut c_uint
) -> c_int