Bump to v1.6.4, add missing sodium_init() call

Author: zonyitoo

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "shadowsocks-rust"
-version = "1.6.3"
+version = "1.6.4"
 authors = ["Y. T. CHUNG <zonyitoo@gmail.com>"]
 description = "shadowsocks is a fast tunnel proxy that helps you bypass firewalls."
 repository = "https://github.com/zonyitoo/shadowsocks-rust"

Cargo.toml

@@ -1,15 +1,19 @@
 //! Cipher defined with libsodium
 
+use std::sync::{ONCE_INIT, Once};
+
 use bytes::{BufMut, BytesMut};
 
 use crypto::{CipherResult, CipherType, StreamCipher};
 
 use libc::c_ulonglong;
 use libsodium_ffi::{crypto_stream_aes128ctr_xor, crypto_stream_chacha20_ietf_xor_ic, crypto_stream_chacha20_xor_ic,
-                    crypto_stream_salsa20_xor_ic, crypto_stream_xsalsa20_xor_ic};
+                    crypto_stream_salsa20_xor_ic, crypto_stream_xsalsa20_xor_ic, sodium_init};
 
 use crypto::cipher::Error;
 
+static SODIUM_INIT_FLAG: Once = ONCE_INIT;
+
 /// Cipher provided by Rust-Crypto
 pub struct SodiumCipher {
     cipher_type: CipherType,
@@ -32,6 +36,10 @@ impl SodiumCipher {
             _ => panic!("sodium cipher does not support {:?} cipher", t),
         }
 
+        SODIUM_INIT_FLAG.call_once(|| unsafe {
+                                       assert_eq!(sodium_init(), 0);
+                                   });
+
         SodiumCipher {
             cipher_type: t,
             key: key.to_owned(),