remove rustc-serialize (#359) (#386)

* Replace rust-crypto dependency by RustCrypto project crate aes-ctr

* Support for x86 build supporting both aesni and aessoft at runtime.
Feature gated behind 'aes-all'.
Building requires RUSTFLAGS="-C target-feature=+aes,+ssse3" and RUSTDOCFLAGS="-C target-feature=+aes,+ssse3".
Only support x86 case.

* Change CI to build with aes ni on all-features

* Switch aes-all logic (is_x86 runtime test did not work as I thought when
RUSTC aes and sse are enabled).
To build with aes-all, aes and sse flag should not be set.

* Use latest aesni from crates.io (with pr to disable compile time
checks).

* Replace rust-crypto dependency by RustCrypto project crate aes-ctr

* Support for x86 build supporting both aesni and aessoft at runtime.
Feature gated behind 'aes-all'.
Building requires RUSTFLAGS="-C target-feature=+aes,+ssse3" and RUSTDOCFLAGS="-C target-feature=+aes,+ssse3".
Only support x86 case.

* Change CI to build with aes ni on all-features

* Switch aes-all logic (is_x86 runtime test did not work as I thought when
RUSTC aes and sse are enabled).
To build with aes-all, aes and sse flag should not be set.

* Use latest aesni from crates.io (with pr to disable compile time
checks).

secio/Cargo.toml

@@ -13,7 +13,10 @@ log = "0.4.1"
 protobuf = "2.0.2"
 rand = "0.3.17"
 ring = { version = "0.12.1", features = ["rsa_signing"] }
-rust-crypto = "^0.2"
+aes-ctr = "0.1.0"
+aesni = { version = "0.4.1", features = ["nocheck"], optional = true }
+ctr = { version = "0.1", optional = true }
+lazy_static = { version = "0.2.11", optional = true }
 rw-stream-sink = { path = "../rw-stream-sink" }
 eth-secp256k1 = { git = "https://github.com/paritytech/rust-secp256k1", optional = true }
 tokio-io = "0.1.0"
@@ -22,6 +25,7 @@ untrusted = "0.5.1"
 [features]
 default = ["secp256k1"]
 secp256k1 = ["eth-secp256k1"]
+aes-all = ["ctr","aesni","lazy_static"]
 
 [dev-dependencies]
 libp2p-tcp-transport = { path = "../tcp-transport" }

secio/src/algo_support.rs

@@ -28,7 +28,7 @@ macro_rules! supported_impl {
         pub mod $mod_name {
             use std::cmp::Ordering;
             #[allow(unused_imports)]
-            use crypto::aes::KeySize;
+            use stream_cipher::KeySize;
             #[allow(unused_imports)]
             use ring::{agreement, digest};
             use error::SecioError;

secio/src/codec/decode.rs

@@ -21,7 +21,7 @@
 //! Individual messages decoding.
 
 use bytes::BytesMut;
-use crypto::symmetriccipher::SynchronousStreamCipher;
+use super::StreamCipher;
 
 use error::SecioError;
 use futures::sink::Sink;
@@ -40,7 +40,7 @@ use ring::hmac;
 ///
 /// Also implements `Sink` for convenience.
 pub struct DecoderMiddleware<S> {
-    cipher_state: Box<SynchronousStreamCipher>,
+    cipher_state: Box<StreamCipher>,
     hmac_key: hmac::VerificationKey,
     // TODO: when a new version of ring is released, we can use `hmac_key.digest_algorithm().output_len` instead
     hmac_num_bytes: usize,
@@ -51,7 +51,7 @@ impl<S> DecoderMiddleware<S> {
     #[inline]
     pub fn new(
         raw_stream: S,
-        cipher: Box<SynchronousStreamCipher>,
+        cipher: Box<StreamCipher>,
         hmac_key: hmac::VerificationKey,
         hmac_num_bytes: usize, // TODO: remove this parameter
     ) -> DecoderMiddleware<S> {
@@ -88,21 +88,24 @@ where
             debug!("frame too short when decoding secio frame");
             return Err(SecioError::FrameTooShort);
         }
-
-        let (crypted_data, expected_hash) = frame.split_at(frame.len() - hmac_num_bytes);
+        let content_length = frame.len() - hmac_num_bytes;
+        {
+            let (crypted_data, expected_hash) = frame.split_at(content_length);
             debug_assert_eq!(expected_hash.len(), hmac_num_bytes);
 
             if hmac::verify(&self.hmac_key, crypted_data, expected_hash).is_err() {
                 debug!("hmac mismatch when decoding secio frame");
                 return Err(SecioError::HmacNotMatching);
             }
+        }
 
-        // Note that there is no way to decipher in place with rust-crypto right now.
-        let mut decrypted_data = crypted_data.to_vec();
+        let mut data_buf = frame.to_vec();
+        data_buf.truncate(content_length);
         self.cipher_state
-            .process(&crypted_data, &mut decrypted_data);
+            .try_apply_keystream(&mut data_buf)
+            .map_err::<SecioError,_>(|e|e.into())?;
 
-        Ok(Async::Ready(Some(decrypted_data)))
+        Ok(Async::Ready(Some(data_buf)))
     }
 }
 

secio/src/codec/encode.rs

@@ -21,7 +21,7 @@
 //! Individual messages encoding.
 
 use bytes::BytesMut;
-use crypto::symmetriccipher::SynchronousStreamCipher;
+use super::StreamCipher;
 use futures::sink::Sink;
 use futures::stream::Stream;
 use futures::Poll;
@@ -36,7 +36,7 @@ use ring::hmac;
 ///
 /// Also implements `Stream` for convenience.
 pub struct EncoderMiddleware<S> {
-    cipher_state: Box<SynchronousStreamCipher>,
+    cipher_state: Box<StreamCipher>,
     hmac_key: hmac::SigningKey,
     raw_sink: S,
 }
@@ -44,7 +44,7 @@ pub struct EncoderMiddleware<S> {
 impl<S> EncoderMiddleware<S> {
     pub fn new(
         raw_sink: S,
-        cipher: Box<SynchronousStreamCipher>,
+        cipher: Box<StreamCipher>,
         hmac_key: hmac::SigningKey,
     ) -> EncoderMiddleware<S> {
         EncoderMiddleware {
@@ -63,21 +63,15 @@ where
     type SinkError = S::SinkError;
 
     fn start_send(&mut self, item: Self::SinkItem) -> StartSend<Self::SinkItem, Self::SinkError> {
-        let capacity = item.len() + self.hmac_key.digest_algorithm().output_len;
 
-        // Apparently this is the fastest way of doing.
-        // See https://gist.github.com/kirushik/e0d93759b0cd102f814408595c20a9d0
-        let mut out_buffer = BytesMut::from(vec![0; capacity]);
+        let mut data_buf = item;
+        // TODO if SinkError gets refactor to SecioError,
+        // then use try_apply_keystream
+        self.cipher_state.apply_keystream(&mut data_buf[..]);
+        let signature = hmac::sign(&self.hmac_key, &data_buf[..]);
+        data_buf.extend_from_slice(signature.as_ref());
+        self.raw_sink.start_send(data_buf)
 
-        {
-            let (out_data, out_sign) = out_buffer.split_at_mut(item.len());
-            self.cipher_state.process(&item, out_data);
-
-            let signature = hmac::sign(&self.hmac_key, out_data);
-            out_sign.copy_from_slice(signature.as_ref());
-        }
-
-        self.raw_sink.start_send(out_buffer)
     }
 
     #[inline]

secio/src/codec/mod.rs

@@ -24,7 +24,7 @@
 use self::decode::DecoderMiddleware;
 use self::encode::EncoderMiddleware;
 
-use crypto::symmetriccipher::SynchronousStreamCipher;
+use aes_ctr::stream_cipher::StreamCipherCore;
 use ring::hmac;
 use tokio_io::codec::length_delimited;
 use tokio_io::{AsyncRead, AsyncWrite};
@@ -35,6 +35,9 @@ mod encode;
 /// Type returned by `full_codec`.
 pub type FullCodec<S> = DecoderMiddleware<EncoderMiddleware<length_delimited::Framed<S>>>;
 
+pub type StreamCipher = StreamCipherCore;
+
+
 /// Takes control of `socket`. Returns an object that implements `future::Sink` and
 /// `future::Stream`. The `Stream` and `Sink` produce and accept `BytesMut` objects.
 ///
@@ -42,9 +45,9 @@ pub type FullCodec<S> = DecoderMiddleware<EncoderMiddleware<length_delimited::Fr
 /// hash algorithm (which are generally decided during the handshake).
 pub fn full_codec<S>(
     socket: length_delimited::Framed<S>,
-    cipher_encoding: Box<SynchronousStreamCipher>,
+    cipher_encoding: Box<StreamCipher>,
     encoding_hmac: hmac::SigningKey,
-    cipher_decoder: Box<SynchronousStreamCipher>,
+    cipher_decoder: Box<StreamCipher>,
     decoding_hmac: hmac::VerificationKey,
 ) -> FullCodec<S>
 where
@@ -61,12 +64,11 @@ mod tests {
     extern crate tokio_tcp;
     use self::tokio_tcp::TcpListener;
     use self::tokio_tcp::TcpStream;
+    use stream_cipher::{ctr, KeySize};
     use super::full_codec;
     use super::DecoderMiddleware;
     use super::EncoderMiddleware;
     use bytes::BytesMut;
-    use crypto::aessafe::AesSafe256Encryptor;
-    use crypto::blockmodes::CtrMode;
     use error::SecioError;
     use futures::sync::mpsc::channel;
     use futures::{Future, Sink, Stream};
@@ -77,6 +79,8 @@ mod tests {
     use std::io::Error as IoError;
     use tokio_io::codec::length_delimited::Framed;
 
+    const NULL_IV : [u8; 16] = [0;16];
+
     #[test]
     fn raw_encode_then_decode() {
         let (data_tx, data_rx) = channel::<BytesMut>(256);
@@ -86,20 +90,15 @@ mod tests {
         let cipher_key: [u8; 32] = rand::random();
         let hmac_key: [u8; 32] = rand::random();
 
+
         let encoder = EncoderMiddleware::new(
             data_tx,
-            Box::new(CtrMode::new(
-                AesSafe256Encryptor::new(&cipher_key),
-                vec![0; 16],
-            )),
+            ctr(KeySize::KeySize256, &cipher_key, &NULL_IV[..]),
             SigningKey::new(&SHA256, &hmac_key),
         );
         let decoder = DecoderMiddleware::new(
             data_rx,
-            Box::new(CtrMode::new(
-                AesSafe256Encryptor::new(&cipher_key),
-                vec![0; 16],
-            )),
+            ctr(KeySize::KeySize256, &cipher_key, &NULL_IV[..]),
             VerificationKey::new(&SHA256, &hmac_key),
             32,
         );
@@ -112,7 +111,7 @@ mod tests {
         let (_, decoded) = tokio_current_thread::block_on_all(data_sent.join(data_received))
             .map_err(|_| ())
             .unwrap();
-        assert_eq!(decoded.unwrap(), data);
+        assert_eq!(&decoded.unwrap()[..], &data[..]);
     }
 
     #[test]
@@ -133,15 +132,9 @@ mod tests {
 
                 full_codec(
                     connec,
-                    Box::new(CtrMode::new(
-                        AesSafe256Encryptor::new(&cipher_key),
-                        vec![0; 16],
-                    )),
+                    ctr(KeySize::KeySize256, &cipher_key, &NULL_IV[..]),
                     SigningKey::new(&SHA256, &hmac_key),
-                    Box::new(CtrMode::new(
-                        AesSafe256Encryptor::new(&cipher_key),
-                        vec![0; 16],
-                    )),
+                    ctr(KeySize::KeySize256, &cipher_key, &NULL_IV[..]),
                     VerificationKey::new(&SHA256, &hmac_key),
                 )
             },
@@ -154,15 +147,9 @@ mod tests {
 
                 full_codec(
                     stream,
-                    Box::new(CtrMode::new(
-                        AesSafe256Encryptor::new(&cipher_key_clone),
-                        vec![0; 16],
-                    )),
+                    ctr(KeySize::KeySize256, &cipher_key_clone, &NULL_IV[..]),
                     SigningKey::new(&SHA256, &hmac_key_clone),
-                    Box::new(CtrMode::new(
-                        AesSafe256Encryptor::new(&cipher_key_clone),
-                        vec![0; 16],
-                    )),
+                    ctr(KeySize::KeySize256, &cipher_key_clone, &NULL_IV[..]),
                     VerificationKey::new(&SHA256, &hmac_key_clone),
                 )
             });

secio/src/error.rs

@@ -20,7 +20,7 @@
 
 //! Defines the `SecioError` enum that groups all possible errors in SECIO.
 
-use crypto::symmetriccipher::SymmetricCipherError;
+use aes_ctr::stream_cipher::LoopError;
 use std::error;
 use std::fmt;
 use std::io::Error as IoError;
@@ -55,8 +55,8 @@ pub enum SecioError {
     /// The final check of the handshake failed.
     NonceVerificationFailed,
 
-    /// Error while decoding/encoding data.
-    CipherError(SymmetricCipherError),
+    /// Error with block cipher.
+    CipherError(LoopError),
 
     /// The received frame was of invalid length.
     FrameTooShort,
@@ -111,9 +111,9 @@ impl fmt::Display for SecioError {
     }
 }
 
-impl From<SymmetricCipherError> for SecioError {
+impl From<LoopError> for SecioError {
     #[inline]
-    fn from(err: SymmetricCipherError) -> SecioError {
+    fn from(err: LoopError) -> SecioError {
         SecioError::CipherError(err)
     }
 }

secio/src/handshake.rs

@@ -21,7 +21,7 @@
 use algo_support;
 use bytes::BytesMut;
 use codec::{full_codec, FullCodec};
-use crypto::aes::{ctr, KeySize};
+use stream_cipher::{KeySize, ctr};
 use error::SecioError;
 use futures::future;
 use futures::sink::Sink;
@@ -456,7 +456,6 @@ where
                 let (cipher_key_size, iv_size) = match chosen_cipher {
                     KeySize::KeySize128 => (16, 16),
                     KeySize::KeySize256 => (32, 16),
-                    _ => panic!()
                 };
 
                 let mut longer_key = vec![0u8; 2 * (iv_size + cipher_key_size + 20)];
@@ -487,8 +486,8 @@ where
                     (cipher, hmac)
                 };
 
-                Ok(full_codec(socket, Box::new(encoding_cipher), encoding_hmac,
-                              Box::new(decoding_cipher), decoding_hmac))
+                Ok(full_codec(socket, encoding_cipher, encoding_hmac,
+                              decoding_cipher, decoding_hmac))
             });
 
             match codec {

secio/src/lib.rs

@@ -78,10 +78,10 @@
 //! `SecioMiddleware` that implements `Sink` and `Stream` and can be used to send packets of data.
 //!
 
+extern crate aes_ctr;
 #[cfg(feature = "secp256k1")]
 extern crate asn1_der;
 extern crate bytes;
-extern crate crypto;
 extern crate futures;
 extern crate libp2p_core;
 #[macro_use]
@@ -95,6 +95,9 @@ extern crate secp256k1;
 extern crate tokio_io;
 extern crate untrusted;
 
+#[cfg(feature = "aes-all")]
+#[macro_use]
+extern crate lazy_static;
 pub use self::error::SecioError;
 
 #[cfg(feature = "secp256k1")]
@@ -118,6 +121,7 @@ mod codec;
 mod error;
 mod handshake;
 mod structs_proto;
+mod stream_cipher;
 
 /// Implementation of the `ConnectionUpgrade` trait of `libp2p_core`. Automatically applies
 /// secio on any connection.

secio/src/stream_cipher.rs

@@ -0,0 +1,109 @@
+
+use aes_ctr::stream_cipher::generic_array::GenericArray;
+use aes_ctr::stream_cipher::{NewFixStreamCipher, StreamCipherCore};
+use aes_ctr::{Aes128Ctr, Aes256Ctr};
+
+#[derive(Clone, Copy)]
+pub enum KeySize {
+    KeySize128,
+    KeySize256,
+}
+
+/// Returns your stream cipher depending on `KeySize`.
+#[cfg(not(all(feature = "aes-all", any(target_arch = "x86_64", target_arch = "x86"))))]
+pub(crate) fn ctr(key_size: KeySize, key: &[u8], iv: &[u8]) -> Box<StreamCipherCore + 'static> {
+    ctr_int(key_size, key, iv)
+}
+ 
+/// Returns your stream cipher depending on `KeySize`.
+#[cfg(all(feature = "aes-all", any(target_arch = "x86_64", target_arch = "x86")))]
+pub(crate) fn ctr(key_size: KeySize, key: &[u8], iv: &[u8]) -> Box<StreamCipherCore + 'static> {
+    if *aes_alt::AES_NI {
+        aes_alt::ctr_alt(key_size, key, iv)
+    } else {
+        ctr_int(key_size, key, iv)
+    }
+}
+
+
+#[cfg(all(feature = "aes-all", any(target_arch = "x86_64", target_arch = "x86")))]
+mod aes_alt {
+    extern crate ctr;
+    extern crate aesni;
+    use self::ctr::Ctr128;
+    use self::aesni::{Aes128, Aes256};
+    use self::ctr::stream_cipher::{NewFixStreamCipher, StreamCipherCore};
+    use self::ctr::stream_cipher::generic_array::GenericArray;
+    use super::KeySize;
+
+    lazy_static! {
+        pub static ref AES_NI: bool = is_x86_feature_detected!("aes")
+            && is_x86_feature_detected!("sse2")
+            && is_x86_feature_detected!("sse3");
+
+   }
+
+    /// AES-128 in CTR mode
+    pub type Aes128Ctr = Ctr128<Aes128>;
+    /// AES-256 in CTR mode
+    pub type Aes256Ctr = Ctr128<Aes256>;
+    /// Returns alternate stream cipher if target functionalities does not allow standard one.
+    /// Eg : aes without sse
+    pub fn ctr_alt(key_size: KeySize, key: &[u8], iv: &[u8]) -> Box<StreamCipherCore + 'static> {
+        match key_size {
+            KeySize::KeySize128 => Box::new(Aes128Ctr::new(
+                GenericArray::from_slice(key),
+                GenericArray::from_slice(iv),
+            )),
+            KeySize::KeySize256 => Box::new(Aes256Ctr::new(
+                GenericArray::from_slice(key),
+                GenericArray::from_slice(iv),
+            )),
+        }
+    }
+
+}
+
+#[inline]
+fn ctr_int(key_size: KeySize, key: &[u8], iv: &[u8]) -> Box<StreamCipherCore + 'static> {
+    match key_size {
+        KeySize::KeySize128 => Box::new(Aes128Ctr::new(
+            GenericArray::from_slice(key),
+            GenericArray::from_slice(iv),
+        )),
+        KeySize::KeySize256 => Box::new(Aes256Ctr::new(
+            GenericArray::from_slice(key),
+            GenericArray::from_slice(iv),
+        )),
+    }
+}
+
+#[cfg(all(
+    feature = "aes-all", 
+    any(target_arch = "x86_64", target_arch = "x86"),
+))]
+#[test]
+fn assert_non_native_run() {
+    // this test is for asserting aes unsuported opcode does not break on old cpu
+    let key = [0;16];
+    let iv = [0;16];
+ 
+    let mut aes = ctr(KeySize::KeySize128, &key, &iv);
+    let mut content = [0;16];
+    assert!(aes
+            .try_apply_keystream(&mut content).is_ok());
+     
+}
+
+// aesni compile check for aes-all (aes-all import aesni through aes_ctr only if those checks pass)
+#[cfg(all(
+    feature = "aes-all", 
+    any(target_arch = "x86_64", target_arch = "x86"),
+    any(target_feature = "aes", target_feature = "ssse3"),
+))]
+compile_error!(
+    "aes-all must be compile without aes and sse3 flags : currently \
+    is_x86_feature_detected macro will not detect feature correctly otherwhise. \
+    RUSTFLAGS=\"-C target-feature=+aes,+ssse3\" enviromental variable. \
+    For x86 target arch additionally enable sse2 target feature."
+);