Function nginx::EVP_PKEY_meth_set_decrypt

pub unsafe extern "C" fn EVP_PKEY_meth_set_decrypt(
    pmeth: *mut EVP_PKEY_METHOD, 
    decrypt_init: Option<unsafe extern "C" fn(ctx: *mut EVP_PKEY_CTX) -> c_int>, 
    decrypt: Option<unsafe extern "C" fn(ctx: *mut EVP_PKEY_CTX, out: *mut c_uchar, outlen: *mut size_t, in_: *const c_uchar, inlen: size_t) -> c_int>
)