Function nginx::EVP_CipherInit_ex

pub unsafe extern "C" fn EVP_CipherInit_ex(
    ctx: *mut EVP_CIPHER_CTX, 
    cipher: *const EVP_CIPHER, 
    impl_: *mut ENGINE, 
    key: *const c_uchar, 
    iv: *const c_uchar, 
    enc: c_int
) -> c_int