Merge remote-tracking branch 'origin/upstream'busytown-mac-infra-release

17 files changed, 2227 insertions, 0 deletions

diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
new file mode 100644
index 0000000..4da2d70
--- /dev/null
+++ b/.cargo_vcs_info.json
@@ -0,0 +1,6 @@
+{
+  "git": {
+    "sha1": "f57236be563e74ed9d4a3df93b6d2da15660bd18"
+  },
+  "path_in_vcs": ""
+}
\ No newline at end of file
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..c11601f
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,8 @@
+version: 2
+updates:
+- package-ecosystem: cargo
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "04:00"
+  open-pull-requests-limit: 10
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6f973fb
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/target/
+Cargo.lock
+.vscode
+*~
diff --git a/Android.bp b/Android.bp
new file mode 100644
index 0000000..76c2d1b
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,42 @@
+// This file is generated by cargo_embargo.
+// Do not modify this file as changes will be overridden on upgrade.
+
+// TODO: Add license.
+rust_library {
+    name: "libsiphasher",
+    host_supported: true,
+    crate_name: "siphasher",
+    cargo_env_compat: true,
+    cargo_pkg_version: "1.0.1",
+    srcs: ["src/lib.rs"],
+    edition: "2018",
+    features: [
+        "default",
+        "std",
+    ],
+    apex_available: [
+        "//apex_available:platform",
+        "//apex_available:anyapex",
+    ],
+    product_available: true,
+    vendor_available: true,
+}
+
+rust_test {
+    name: "siphasher_test_src_lib",
+    host_supported: true,
+    crate_name: "siphasher",
+    cargo_env_compat: true,
+    cargo_pkg_version: "1.0.1",
+    srcs: ["src/lib.rs"],
+    test_suites: ["general-tests"],
+    auto_gen_config: true,
+    test_options: {
+        unit_test: true,
+    },
+    edition: "2018",
+    features: [
+        "default",
+        "std",
+    ],
+}
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..d44800c
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,7 @@
+Copyright 2012-2016 The Rust Project Developers.
+Copyright 2016-2024 Frank Denis.
+
+Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+<LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+option.
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..336ee1e
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,54 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+name = "siphasher"
+version = "1.0.1"
+authors = ["Frank Denis <github@pureftpd.org>"]
+description = "SipHash-2-4, SipHash-1-3 and 128-bit variants in pure Rust"
+homepage = "https://docs.rs/siphasher"
+documentation = "https://docs.rs/siphasher"
+readme = "README.md"
+keywords = [
+    "crypto",
+    "hash",
+    "siphash",
+]
+categories = [
+    "algorithms",
+    "cryptography",
+]
+license = "MIT/Apache-2.0"
+repository = "https://github.com/jedisct1/rust-siphash"
+
+[profile.release]
+opt-level = 3
+lto = true
+panic = "abort"
+
+[dependencies.serde]
+version = "1.0"
+features = ["derive"]
+optional = true
+
+[dependencies.serde_json]
+version = "1.0"
+optional = true
+
+[features]
+default = ["std"]
+serde_no_std = ["serde/alloc"]
+serde_std = [
+    "std",
+    "serde/std",
+]
+std = []
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..16fe87b
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
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+   "Work" shall mean the work of authorship, whether in Source or
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+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
+   by You to the Licensor shall be under the terms and conditions of
+   this License, without any additional terms or conditions.
+   Notwithstanding the above, nothing herein shall supersede or modify
+   the terms of any separate license agreement you may have executed
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+6. Trademarks. This License does not grant permission to use the trade
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+7. Disclaimer of Warranty. Unless required by applicable law or
+   agreed to in writing, Licensor provides the Work (and each
+   Contributor provides its Contributions) on an "AS IS" BASIS,
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+   appropriateness of using or redistributing the Work and assume any
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+
+8. Limitation of Liability. In no event and under no legal theory,
+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
+   negligent acts) or agreed to in writing, shall any Contributor be
+   liable to You for damages, including any direct, indirect, special,
+   incidental, or consequential damages of any character arising as a
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+   Work (including but not limited to damages for loss of goodwill,
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+   on Your own behalf and on Your sole responsibility, not on behalf
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+END OF TERMS AND CONDITIONS
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+APPENDIX: How to apply the Apache License to your work.
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+   To apply the Apache License to your work, attach the following
+   boilerplate notice, with the fields enclosed by brackets "[]"
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+   file or class name and description of purpose be included on the
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+Copyright [yyyy] [name of copyright owner]
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+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/METADATA b/METADATA
new file mode 100644
index 0000000..c379548
--- /dev/null
+++ b/METADATA
@@ -0,0 +1,20 @@
+name: "siphasher"
+description: "SipHash-2-4, SipHash-1-3 and 128-bit variants in pure Rust"
+third_party {
+  identifier {
+    type: "crates.io"
+    value: "siphasher"
+  }
+  identifier {
+    type: "Archive"
+    value: "https://static.crates.io/crates/siphasher/siphasher-1.0.1.crate"
+    primary_source: true
+  }
+  version: "1.0.1"
+  license_type: NOTICE
+  last_upgrade_date {
+    year: 2024
+    month: 3
+    day: 21
+  }
+}
diff --git a/MODULE_LICENSE_APACHE2 b/MODULE_LICENSE_APACHE2
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/MODULE_LICENSE_APACHE2
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..48bea6e
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,2 @@
+# Bug component: 688011
+include platform/prebuilts/rust:main:/OWNERS
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e485ab4
--- /dev/null
+++ b/README.md
@@ -0,0 +1,93 @@
+SipHash implementation for Rust
+===============================
+
+This crates implements SipHash-2-4 and SipHash-1-3 in Rust.
+
+It is based on the original implementation from rust-core and exposes the
+same API.
+
+It also implements SipHash variants returning 128-bit tags.
+
+The `sip` module implements the standard 64-bit mode, whereas the `sip128`
+module implements the 128-bit mode.
+
+Usage
+-----
+
+In `Cargo.toml`:
+
+```toml
+[dependencies]
+siphasher = "1"
+```
+
+If you want [serde](https://github.com/serde-rs/serde) support, include the feature like this:
+
+```toml
+[dependencies]
+siphasher = { version = "1", features = ["serde"] }
+```
+
+64-bit mode:
+
+```rust
+use siphasher::sip::{SipHasher, SipHasher13, SipHasher24};
+
+// one-shot:
+
+let array: &[u8] = &[1, 2, 3];
+let key: &[u8; 16] = &[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
+let hasher = SipHasher13::new_with_key(key);
+let h = hasher.hash(array);
+
+// incremental:
+
+use core::hash::Hasher;
+
+let array1: &[u8] = &[1, 2, 3];
+let array2: &[u8] = &[4, 5, 6];
+let key: &[u8; 16] = &[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
+let mut hasher = SipHasher13::new_with_key(key);
+hasher.write(array1);
+hasher.write(array2);
+let h = hasher.finish();
+```
+
+128-bit mode:
+
+```rust
+use siphasher::sip128::{Hasher128, SipHasher, SipHasher13, SipHasher24};
+
+// one-shot:
+
+let array: &[u8] = &[1, 2, 3];
+let key: &[u8; 16] = &[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
+let hasher = SipHasher13::new_with_key(key);
+let h = hasher.hash(array).as_bytes();
+
+// incremental:
+
+use core::hash::Hasher;
+
+let array1: &[u8] = &[1, 2, 3];
+let array2: &[u8] = &[4, 5, 6];
+let key: &[u8; 16] = &[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
+let mut hasher = SipHasher13::new_with_key(key);
+hasher.write(array1);
+hasher.write(array2);
+let h = hasher.finish128().as_bytes();
+```
+
+[API documentation](https://docs.rs/siphasher/)
+-----------------------------------------------
+
+Note
+----
+
+Due to a confusing and not well documented API, methods from the `Hasher` trait of the standard library (`std::hash::Hasher`, `core::hash::Hasher`) produce non-portable results.
+
+This is not specific to SipHash, and affects all hash functions.
+
+The only safe methods in that trait are `write()` and `finish()`.
+
+It is thus recommended to use SipHash (and all other hash functions, actually) as documented above.
diff --git a/cargo_embargo.json b/cargo_embargo.json
new file mode 100644
index 0000000..c8842d1
--- /dev/null
+++ b/cargo_embargo.json
@@ -0,0 +1,4 @@
+{
+  "run_cargo": false,
+  "tests": true
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..2a89800
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,30 @@
+#![doc = include_str!("../README.md")]
+
+#![cfg_attr(not(test), no_std)]
+#![allow(clippy::unreadable_literal)]
+#![allow(clippy::cast_lossless)]
+#![allow(clippy::many_single_char_names)]
+
+pub mod sip;
+pub mod sip128;
+
+#[cfg(test)]
+mod tests;
+
+#[cfg(test)]
+mod tests128;
+
+#[cfg(any(feature = "serde", feature = "serde_std", feature = "serde_no_std"))]
+pub mod reexports {
+    pub use serde;
+    #[cfg(feature = "serde_json")]
+    pub use serde_json;
+}
+
+pub mod prelude {
+    pub use core::hash::Hasher as _;
+
+    pub use sip128::Hasher128 as _;
+
+    pub use crate::{sip, sip128};
+}
diff --git a/src/sip.rs b/src/sip.rs
new file mode 100644
index 0000000..4ed90ed
--- /dev/null
+++ b/src/sip.rs
@@ -0,0 +1,594 @@
+// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! An implementation of SipHash.
+
+use core::cmp;
+use core::hash;
+use core::hash::Hasher as _;
+use core::marker::PhantomData;
+use core::mem;
+use core::ptr;
+use core::u64;
+
+/// An implementation of SipHash 1-3.
+///
+/// See: <https://www.aumasson.jp/siphash/siphash.pdf>
+#[derive(Debug, Clone, Copy, Default)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+pub struct SipHasher13 {
+    hasher: Hasher<Sip13Rounds>,
+}
+
+/// An implementation of SipHash 2-4.
+///
+/// See: <https://www.aumasson.jp/siphash/siphash.pdf>
+#[derive(Debug, Clone, Copy, Default)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+pub struct SipHasher24 {
+    hasher: Hasher<Sip24Rounds>,
+}
+
+/// An implementation of SipHash 2-4.
+///
+/// See: <https://www.aumasson.jp/siphash/siphash.pdf>
+///
+/// SipHash is a general-purpose hashing function: it runs at a good
+/// speed (competitive with Spooky and City) and permits strong _keyed_
+/// hashing. This lets you key your hashtables from a strong RNG, such as
+/// [`rand::os::OsRng`](https://doc.rust-lang.org/rand/rand/os/struct.OsRng.html).
+///
+/// Although the SipHash algorithm is considered to be generally strong,
+/// it is not intended for cryptographic purposes. As such, all
+/// cryptographic uses of this implementation are _strongly discouraged_.
+#[derive(Debug, Clone, Copy, Default)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+pub struct SipHasher(SipHasher24);
+
+#[derive(Debug, Clone, Copy)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+struct Hasher<S: Sip> {
+    k0: u64,
+    k1: u64,
+    length: usize, // how many bytes we've processed
+    state: State,  // hash State
+    tail: u64,     // unprocessed bytes le
+    ntail: usize,  // how many bytes in tail are valid
+    _marker: PhantomData<S>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+struct State {
+    // v0, v2 and v1, v3 show up in pairs in the algorithm,
+    // and simd implementations of SipHash will use vectors
+    // of v02 and v13. By placing them in this order in the struct,
+    // the compiler can pick up on just a few simd optimizations by itself.
+    v0: u64,
+    v2: u64,
+    v1: u64,
+    v3: u64,
+}
+
+macro_rules! compress {
+    ($state:expr) => {{
+        compress!($state.v0, $state.v1, $state.v2, $state.v3)
+    }};
+    ($v0:expr, $v1:expr, $v2:expr, $v3:expr) => {{
+        $v0 = $v0.wrapping_add($v1);
+        $v1 = $v1.rotate_left(13);
+        $v1 ^= $v0;
+        $v0 = $v0.rotate_left(32);
+        $v2 = $v2.wrapping_add($v3);
+        $v3 = $v3.rotate_left(16);
+        $v3 ^= $v2;
+        $v0 = $v0.wrapping_add($v3);
+        $v3 = $v3.rotate_left(21);
+        $v3 ^= $v0;
+        $v2 = $v2.wrapping_add($v1);
+        $v1 = $v1.rotate_left(17);
+        $v1 ^= $v2;
+        $v2 = $v2.rotate_left(32);
+    }};
+}
+
+/// Loads an integer of the desired type from a byte stream, in LE order. Uses
+/// `copy_nonoverlapping` to let the compiler generate the most efficient way
+/// to load it from a possibly unaligned address.
+///
+/// Unsafe because: unchecked indexing at `i..i+size_of(int_ty)`
+macro_rules! load_int_le {
+    ($buf:expr, $i:expr, $int_ty:ident) => {{
+        debug_assert!($i + mem::size_of::<$int_ty>() <= $buf.len());
+        let mut data = 0 as $int_ty;
+        ptr::copy_nonoverlapping(
+            $buf.as_ptr().add($i),
+            &mut data as *mut _ as *mut u8,
+            mem::size_of::<$int_ty>(),
+        );
+        data.to_le()
+    }};
+}
+
+/// Loads a u64 using up to 7 bytes of a byte slice. It looks clumsy but the
+/// `copy_nonoverlapping` calls that occur (via `load_int_le!`) all have fixed
+/// sizes and avoid calling `memcpy`, which is good for speed.
+///
+/// Unsafe because: unchecked indexing at start..start+len
+#[inline]
+unsafe fn u8to64_le(buf: &[u8], start: usize, len: usize) -> u64 {
+    debug_assert!(len < 8);
+    let mut i = 0; // current byte index (from LSB) in the output u64
+    let mut out = 0;
+    if i + 3 < len {
+        out = load_int_le!(buf, start + i, u32) as u64;
+        i += 4;
+    }
+    if i + 1 < len {
+        out |= (load_int_le!(buf, start + i, u16) as u64) << (i * 8);
+        i += 2
+    }
+    if i < len {
+        out |= (*buf.get_unchecked(start + i) as u64) << (i * 8);
+        i += 1;
+    }
+    debug_assert_eq!(i, len);
+    out
+}
+
+impl SipHasher {
+    /// Creates a new `SipHasher` with the two initial keys set to 0.
+    #[inline]
+    pub fn new() -> SipHasher {
+        SipHasher::new_with_keys(0, 0)
+    }
+
+    /// Creates a `SipHasher` that is keyed off the provided keys.
+    #[inline]
+    pub fn new_with_keys(key0: u64, key1: u64) -> SipHasher {
+        SipHasher(SipHasher24::new_with_keys(key0, key1))
+    }
+
+    /// Creates a `SipHasher` from a 16 byte key.
+    pub fn new_with_key(key: &[u8; 16]) -> SipHasher {
+        let mut b0 = [0u8; 8];
+        let mut b1 = [0u8; 8];
+        b0.copy_from_slice(&key[0..8]);
+        b1.copy_from_slice(&key[8..16]);
+        let key0 = u64::from_le_bytes(b0);
+        let key1 = u64::from_le_bytes(b1);
+        Self::new_with_keys(key0, key1)
+    }
+
+    /// Get the keys used by this hasher
+    pub fn keys(&self) -> (u64, u64) {
+        (self.0.hasher.k0, self.0.hasher.k1)
+    }
+
+    /// Get the key used by this hasher as a 16 byte vector
+    pub fn key(&self) -> [u8; 16] {
+        let mut bytes = [0u8; 16];
+        bytes[0..8].copy_from_slice(&self.0.hasher.k0.to_le_bytes());
+        bytes[8..16].copy_from_slice(&self.0.hasher.k1.to_le_bytes());
+        bytes
+    }
+
+    /// Hash a byte array - This is the easiest and safest way to use SipHash.
+    #[inline]
+    pub fn hash(&self, bytes: &[u8]) -> u64 {
+        let mut hasher = self.0.hasher;
+        hasher.write(bytes);
+        hasher.finish()
+    }
+}
+
+impl SipHasher13 {
+    /// Creates a new `SipHasher13` with the two initial keys set to 0.
+    #[inline]
+    pub fn new() -> SipHasher13 {
+        SipHasher13::new_with_keys(0, 0)
+    }
+
+    /// Creates a `SipHasher13` that is keyed off the provided keys.
+    #[inline]
+    pub fn new_with_keys(key0: u64, key1: u64) -> SipHasher13 {
+        SipHasher13 {
+            hasher: Hasher::new_with_keys(key0, key1),
+        }
+    }
+
+    /// Creates a `SipHasher13` from a 16 byte key.
+    pub fn new_with_key(key: &[u8; 16]) -> SipHasher13 {
+        let mut b0 = [0u8; 8];
+        let mut b1 = [0u8; 8];
+        b0.copy_from_slice(&key[0..8]);
+        b1.copy_from_slice(&key[8..16]);
+        let key0 = u64::from_le_bytes(b0);
+        let key1 = u64::from_le_bytes(b1);
+        Self::new_with_keys(key0, key1)
+    }
+
+    /// Get the keys used by this hasher
+    pub fn keys(&self) -> (u64, u64) {
+        (self.hasher.k0, self.hasher.k1)
+    }
+
+    /// Get the key used by this hasher as a 16 byte vector
+    pub fn key(&self) -> [u8; 16] {
+        let mut bytes = [0u8; 16];
+        bytes[0..8].copy_from_slice(&self.hasher.k0.to_le_bytes());
+        bytes[8..16].copy_from_slice(&self.hasher.k1.to_le_bytes());
+        bytes
+    }
+
+    /// Hash a byte array - This is the easiest and safest way to use SipHash.
+    #[inline]
+    pub fn hash(&self, bytes: &[u8]) -> u64 {
+        let mut hasher = self.hasher;
+        hasher.write(bytes);
+        hasher.finish()
+    }
+}
+
+impl SipHasher24 {
+    /// Creates a new `SipHasher24` with the two initial keys set to 0.
+    #[inline]
+    pub fn new() -> SipHasher24 {
+        SipHasher24::new_with_keys(0, 0)
+    }
+
+    /// Creates a `SipHasher24` that is keyed off the provided keys.
+    #[inline]
+    pub fn new_with_keys(key0: u64, key1: u64) -> SipHasher24 {
+        SipHasher24 {
+            hasher: Hasher::new_with_keys(key0, key1),
+        }
+    }
+
+    /// Creates a `SipHasher24` from a 16 byte key.
+    pub fn new_with_key(key: &[u8; 16]) -> SipHasher24 {
+        let mut b0 = [0u8; 8];
+        let mut b1 = [0u8; 8];
+        b0.copy_from_slice(&key[0..8]);
+        b1.copy_from_slice(&key[8..16]);
+        let key0 = u64::from_le_bytes(b0);
+        let key1 = u64::from_le_bytes(b1);
+        Self::new_with_keys(key0, key1)
+    }
+
+    /// Get the keys used by this hasher
+    pub fn keys(&self) -> (u64, u64) {
+        (self.hasher.k0, self.hasher.k1)
+    }
+
+    /// Get the key used by this hasher as a 16 byte vector
+    pub fn key(&self) -> [u8; 16] {
+        let mut bytes = [0u8; 16];
+        bytes[0..8].copy_from_slice(&self.hasher.k0.to_le_bytes());
+        bytes[8..16].copy_from_slice(&self.hasher.k1.to_le_bytes());
+        bytes
+    }
+
+    /// Hash a byte array - This is the easiest and safest way to use SipHash.
+    #[inline]
+    pub fn hash(&self, bytes: &[u8]) -> u64 {
+        let mut hasher = self.hasher;
+        hasher.write(bytes);
+        hasher.finish()
+    }
+}
+
+impl<S: Sip> Hasher<S> {
+    #[inline]
+    fn new_with_keys(key0: u64, key1: u64) -> Hasher<S> {
+        let mut state = Hasher {
+            k0: key0,
+            k1: key1,
+            length: 0,
+            state: State {
+                v0: 0,
+                v1: 0,
+                v2: 0,
+                v3: 0,
+            },
+            tail: 0,
+            ntail: 0,
+            _marker: PhantomData,
+        };
+        state.reset();
+        state
+    }
+
+    #[inline]
+    fn reset(&mut self) {
+        self.length = 0;
+        self.state.v0 = self.k0 ^ 0x736f6d6570736575;
+        self.state.v1 = self.k1 ^ 0x646f72616e646f6d;
+        self.state.v2 = self.k0 ^ 0x6c7967656e657261;
+        self.state.v3 = self.k1 ^ 0x7465646279746573;
+        self.ntail = 0;
+    }
+
+    // A specialized write function for values with size <= 8.
+    //
+    // The hashing of multi-byte integers depends on endianness. E.g.:
+    // - little-endian: `write_u32(0xDDCCBBAA)` == `write([0xAA, 0xBB, 0xCC, 0xDD])`
+    // - big-endian:    `write_u32(0xDDCCBBAA)` == `write([0xDD, 0xCC, 0xBB, 0xAA])`
+    //
+    // This function does the right thing for little-endian hardware. On
+    // big-endian hardware `x` must be byte-swapped first to give the right
+    // behaviour. After any byte-swapping, the input must be zero-extended to
+    // 64-bits. The caller is responsible for the byte-swapping and
+    // zero-extension.
+    #[inline]
+    fn short_write<T>(&mut self, _x: T, x: u64) {
+        let size = mem::size_of::<T>();
+        self.length += size;
+
+        // The original number must be zero-extended, not sign-extended.
+        debug_assert!(if size < 8 { x >> (8 * size) == 0 } else { true });
+
+        // The number of bytes needed to fill `self.tail`.
+        let needed = 8 - self.ntail;
+
+        self.tail |= x << (8 * self.ntail);
+        if size < needed {
+            self.ntail += size;
+            return;
+        }
+
+        // `self.tail` is full, process it.
+        self.state.v3 ^= self.tail;
+        S::c_rounds(&mut self.state);
+        self.state.v0 ^= self.tail;
+
+        self.ntail = size - needed;
+        self.tail = if needed < 8 { x >> (8 * needed) } else { 0 };
+    }
+}
+
+impl hash::Hasher for SipHasher {
+    #[inline]
+    fn write(&mut self, msg: &[u8]) {
+        self.0.write(msg)
+    }
+
+    #[inline]
+    fn finish(&self) -> u64 {
+        self.0.finish()
+    }
+
+    #[inline]
+    fn write_usize(&mut self, i: usize) {
+        self.0.write_usize(i);
+    }
+
+    #[inline]
+    fn write_u8(&mut self, i: u8) {
+        self.0.write_u8(i);
+    }
+
+    #[inline]
+    fn write_u16(&mut self, i: u16) {
+        self.0.write_u16(i);
+    }
+
+    #[inline]
+    fn write_u32(&mut self, i: u32) {
+        self.0.write_u32(i);
+    }
+
+    #[inline]
+    fn write_u64(&mut self, i: u64) {
+        self.0.write_u64(i);
+    }
+}
+
+impl hash::Hasher for SipHasher13 {
+    #[inline]
+    fn write(&mut self, msg: &[u8]) {
+        self.hasher.write(msg)
+    }
+
+    #[inline]
+    fn finish(&self) -> u64 {
+        self.hasher.finish()
+    }
+
+    #[inline]
+    fn write_usize(&mut self, i: usize) {
+        self.hasher.write_usize(i);
+    }
+
+    #[inline]
+    fn write_u8(&mut self, i: u8) {
+        self.hasher.write_u8(i);
+    }
+
+    #[inline]
+    fn write_u16(&mut self, i: u16) {
+        self.hasher.write_u16(i);
+    }
+
+    #[inline]
+    fn write_u32(&mut self, i: u32) {
+        self.hasher.write_u32(i);
+    }
+
+    #[inline]
+    fn write_u64(&mut self, i: u64) {
+        self.hasher.write_u64(i);
+    }
+}
+
+impl hash::Hasher for SipHasher24 {
+    #[inline]
+    fn write(&mut self, msg: &[u8]) {
+        self.hasher.write(msg)
+    }
+
+    #[inline]
+    fn finish(&self) -> u64 {
+        self.hasher.finish()
+    }
+
+    #[inline]
+    fn write_usize(&mut self, i: usize) {
+        self.hasher.write_usize(i);
+    }
+
+    #[inline]
+    fn write_u8(&mut self, i: u8) {
+        self.hasher.write_u8(i);
+    }
+
+    #[inline]
+    fn write_u16(&mut self, i: u16) {
+        self.hasher.write_u16(i);
+    }
+
+    #[inline]
+    fn write_u32(&mut self, i: u32) {
+        self.hasher.write_u32(i);
+    }
+
+    #[inline]
+    fn write_u64(&mut self, i: u64) {
+        self.hasher.write_u64(i);
+    }
+}
+
+impl<S: Sip> hash::Hasher for Hasher<S> {
+    #[inline]
+    fn write_usize(&mut self, i: usize) {
+        self.short_write(i, i.to_le() as u64);
+    }
+
+    #[inline]
+    fn write_u8(&mut self, i: u8) {
+        self.short_write(i, i as u64);
+    }
+
+    #[inline]
+    fn write_u32(&mut self, i: u32) {
+        self.short_write(i, i.to_le() as u64);
+    }
+
+    #[inline]
+    fn write_u64(&mut self, i: u64) {
+        self.short_write(i, i.to_le());
+    }
+
+    #[inline]
+    fn write(&mut self, msg: &[u8]) {
+        let length = msg.len();
+        self.length += length;
+
+        let mut needed = 0;
+
+        if self.ntail != 0 {
+            needed = 8 - self.ntail;
+            self.tail |= unsafe { u8to64_le(msg, 0, cmp::min(length, needed)) } << (8 * self.ntail);
+            if length < needed {
+                self.ntail += length;
+                return;
+            } else {
+                self.state.v3 ^= self.tail;
+                S::c_rounds(&mut self.state);
+                self.state.v0 ^= self.tail;
+                self.ntail = 0;
+            }
+        }
+
+        // Buffered tail is now flushed, process new input.
+        let len = length - needed;
+        let left = len & 0x7;
+
+        let mut i = needed;
+        while i < len - left {
+            let mi = unsafe { load_int_le!(msg, i, u64) };
+
+            self.state.v3 ^= mi;
+            S::c_rounds(&mut self.state);
+            self.state.v0 ^= mi;
+
+            i += 8;
+        }
+
+        self.tail = unsafe { u8to64_le(msg, i, left) };
+        self.ntail = left;
+    }
+
+    #[inline]
+    fn finish(&self) -> u64 {
+        let mut state = self.state;
+
+        let b: u64 = ((self.length as u64 & 0xff) << 56) | self.tail;
+
+        state.v3 ^= b;
+        S::c_rounds(&mut state);
+        state.v0 ^= b;
+
+        state.v2 ^= 0xff;
+        S::d_rounds(&mut state);
+
+        state.v0 ^ state.v1 ^ state.v2 ^ state.v3
+    }
+}
+
+impl<S: Sip> Default for Hasher<S> {
+    /// Creates a `Hasher<S>` with the two initial keys set to 0.
+    #[inline]
+    fn default() -> Hasher<S> {
+        Hasher::new_with_keys(0, 0)
+    }
+}
+
+#[doc(hidden)]
+trait Sip {
+    fn c_rounds(_: &mut State);
+    fn d_rounds(_: &mut State);
+}
+
+#[derive(Debug, Clone, Copy, Default)]
+struct Sip13Rounds;
+
+impl Sip for Sip13Rounds {
+    #[inline]
+    fn c_rounds(state: &mut State) {
+        compress!(state);
+    }
+
+    #[inline]
+    fn d_rounds(state: &mut State) {
+        compress!(state);
+        compress!(state);
+        compress!(state);
+    }
+}
+
+#[derive(Debug, Clone, Copy, Default)]
+struct Sip24Rounds;
+
+impl Sip for Sip24Rounds {
+    #[inline]
+    fn c_rounds(state: &mut State) {
+        compress!(state);
+        compress!(state);
+    }
+
+    #[inline]
+    fn d_rounds(state: &mut State) {
+        compress!(state);
+        compress!(state);
+        compress!(state);
+        compress!(state);
+    }
+}
diff --git a/src/sip128.rs b/src/sip128.rs
new file mode 100644
index 0000000..5299ed0
--- /dev/null
+++ b/src/sip128.rs
@@ -0,0 +1,696 @@
+// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! An implementation of SipHash with a 128-bit output.
+
+use core::cmp;
+use core::hash;
+use core::hash::Hasher as _;
+use core::marker::PhantomData;
+use core::mem;
+use core::ptr;
+use core::u64;
+
+/// A 128-bit (2x64) hash output
+#[derive(Debug, Clone, Copy, Default)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+pub struct Hash128 {
+    pub h1: u64,
+    pub h2: u64,
+}
+
+impl From<u128> for Hash128 {
+    fn from(v: u128) -> Self {
+        Hash128 {
+            h1: v as u64,
+            h2: (v >> 64) as u64,
+        }
+    }
+}
+
+impl From<Hash128> for u128 {
+    fn from(h: Hash128) -> u128 {
+        (h.h1 as u128) | ((h.h2 as u128) << 64)
+    }
+}
+
+/// An implementation of SipHash128 1-3.
+#[derive(Debug, Clone, Copy, Default)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+pub struct SipHasher13 {
+    hasher: Hasher<Sip13Rounds>,
+}
+
+/// An implementation of SipHash128 2-4.
+#[derive(Debug, Clone, Copy, Default)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+pub struct SipHasher24 {
+    hasher: Hasher<Sip24Rounds>,
+}
+
+/// An implementation of SipHash128 2-4.
+///
+/// SipHash is a general-purpose hashing function: it runs at a good
+/// speed (competitive with Spooky and City) and permits strong _keyed_
+/// hashing. This lets you key your hashtables from a strong RNG, such as
+/// [`rand::os::OsRng`](https://doc.rust-lang.org/rand/rand/os/struct.OsRng.html).
+///
+/// Although the SipHash algorithm is considered to be generally strong,
+/// it is not intended for cryptographic purposes. As such, all
+/// cryptographic uses of this implementation are _strongly discouraged_.
+#[derive(Debug, Clone, Copy, Default)]
+pub struct SipHasher(SipHasher24);
+
+#[derive(Debug, Copy)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+struct Hasher<S: Sip> {
+    k0: u64,
+    k1: u64,
+    length: usize, // how many bytes we've processed
+    state: State,  // hash State
+    tail: u64,     // unprocessed bytes le
+    ntail: usize,  // how many bytes in tail are valid
+    _marker: PhantomData<S>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+struct State {
+    // v0, v2 and v1, v3 show up in pairs in the algorithm,
+    // and simd implementations of SipHash will use vectors
+    // of v02 and v13. By placing them in this order in the struct,
+    // the compiler can pick up on just a few simd optimizations by itself.
+    v0: u64,
+    v2: u64,
+    v1: u64,
+    v3: u64,
+}
+
+macro_rules! compress {
+    ($state:expr) => {{
+        compress!($state.v0, $state.v1, $state.v2, $state.v3)
+    }};
+    ($v0:expr, $v1:expr, $v2:expr, $v3:expr) => {{
+        $v0 = $v0.wrapping_add($v1);
+        $v1 = $v1.rotate_left(13);
+        $v1 ^= $v0;
+        $v0 = $v0.rotate_left(32);
+        $v2 = $v2.wrapping_add($v3);
+        $v3 = $v3.rotate_left(16);
+        $v3 ^= $v2;
+        $v0 = $v0.wrapping_add($v3);
+        $v3 = $v3.rotate_left(21);
+        $v3 ^= $v0;
+        $v2 = $v2.wrapping_add($v1);
+        $v1 = $v1.rotate_left(17);
+        $v1 ^= $v2;
+        $v2 = $v2.rotate_left(32);
+    }};
+}
+
+/// Loads an integer of the desired type from a byte stream, in LE order. Uses
+/// `copy_nonoverlapping` to let the compiler generate the most efficient way
+/// to load it from a possibly unaligned address.
+///
+/// Unsafe because: unchecked indexing at `i..i+size_of(int_ty)`
+macro_rules! load_int_le {
+    ($buf:expr, $i:expr, $int_ty:ident) => {{
+        debug_assert!($i + mem::size_of::<$int_ty>() <= $buf.len());
+        let mut data = 0 as $int_ty;
+        ptr::copy_nonoverlapping(
+            $buf.as_ptr().add($i),
+            &mut data as *mut _ as *mut u8,
+            mem::size_of::<$int_ty>(),
+        );
+        data.to_le()
+    }};
+}
+
+/// Loads a u64 using up to 7 bytes of a byte slice. It looks clumsy but the
+/// `copy_nonoverlapping` calls that occur (via `load_int_le!`) all have fixed
+/// sizes and avoid calling `memcpy`, which is good for speed.
+///
+/// Unsafe because: unchecked indexing at start..start+len
+#[inline]
+unsafe fn u8to64_le(buf: &[u8], start: usize, len: usize) -> u64 {
+    debug_assert!(len < 8);
+    let mut i = 0; // current byte index (from LSB) in the output u64
+    let mut out = 0;
+    if i + 3 < len {
+        out = load_int_le!(buf, start + i, u32) as u64;
+        i += 4;
+    }
+    if i + 1 < len {
+        out |= (load_int_le!(buf, start + i, u16) as u64) << (i * 8);
+        i += 2
+    }
+    if i < len {
+        out |= (*buf.get_unchecked(start + i) as u64) << (i * 8);
+        i += 1;
+    }
+    debug_assert_eq!(i, len);
+    out
+}
+
+pub trait Hasher128 {
+    /// Return a 128-bit hash
+    fn finish128(&self) -> Hash128;
+}
+
+impl SipHasher {
+    /// Creates a new `SipHasher` with the two initial keys set to 0.
+    #[inline]
+    pub fn new() -> SipHasher {
+        SipHasher::new_with_keys(0, 0)
+    }
+
+    /// Creates a `SipHasher` that is keyed off the provided keys.
+    #[inline]
+    pub fn new_with_keys(key0: u64, key1: u64) -> SipHasher {
+        SipHasher(SipHasher24::new_with_keys(key0, key1))
+    }
+
+    /// Creates a `SipHasher` from a 16 byte key.
+    pub fn new_with_key(key: &[u8; 16]) -> SipHasher {
+        let mut b0 = [0u8; 8];
+        let mut b1 = [0u8; 8];
+        b0.copy_from_slice(&key[0..8]);
+        b1.copy_from_slice(&key[8..16]);
+        let key0 = u64::from_le_bytes(b0);
+        let key1 = u64::from_le_bytes(b1);
+        Self::new_with_keys(key0, key1)
+    }
+
+    /// Get the keys used by this hasher
+    pub fn keys(&self) -> (u64, u64) {
+        (self.0.hasher.k0, self.0.hasher.k1)
+    }
+
+    /// Get the key used by this hasher as a 16 byte vector
+    pub fn key(&self) -> [u8; 16] {
+        let mut bytes = [0u8; 16];
+        bytes[0..8].copy_from_slice(&self.0.hasher.k0.to_le_bytes());
+        bytes[8..16].copy_from_slice(&self.0.hasher.k1.to_le_bytes());
+        bytes
+    }
+
+    /// Hash a byte array - This is the easiest and safest way to use SipHash.
+    #[inline]
+    pub fn hash(&self, bytes: &[u8]) -> Hash128 {
+        let mut hasher = self.0.hasher;
+        hasher.write(bytes);
+        hasher.finish128()
+    }
+}
+
+impl Hasher128 for SipHasher {
+    /// Return a 128-bit hash
+    #[inline]
+    fn finish128(&self) -> Hash128 {
+        self.0.finish128()
+    }
+}
+
+impl SipHasher13 {
+    /// Creates a new `SipHasher13` with the two initial keys set to 0.
+    #[inline]
+    pub fn new() -> SipHasher13 {
+        SipHasher13::new_with_keys(0, 0)
+    }
+
+    /// Creates a `SipHasher13` that is keyed off the provided keys.
+    #[inline]
+    pub fn new_with_keys(key0: u64, key1: u64) -> SipHasher13 {
+        SipHasher13 {
+            hasher: Hasher::new_with_keys(key0, key1),
+        }
+    }
+
+    /// Creates a `SipHasher13` from a 16 byte key.
+    pub fn new_with_key(key: &[u8; 16]) -> SipHasher13 {
+        let mut b0 = [0u8; 8];
+        let mut b1 = [0u8; 8];
+        b0.copy_from_slice(&key[0..8]);
+        b1.copy_from_slice(&key[8..16]);
+        let key0 = u64::from_le_bytes(b0);
+        let key1 = u64::from_le_bytes(b1);
+        Self::new_with_keys(key0, key1)
+    }
+
+    /// Get the keys used by this hasher
+    pub fn keys(&self) -> (u64, u64) {
+        (self.hasher.k0, self.hasher.k1)
+    }
+
+    /// Get the key used by this hasher as a 16 byte vector
+    pub fn key(&self) -> [u8; 16] {
+        let mut bytes = [0u8; 16];
+        bytes[0..8].copy_from_slice(&self.hasher.k0.to_le_bytes());
+        bytes[8..16].copy_from_slice(&self.hasher.k1.to_le_bytes());
+        bytes
+    }
+
+    /// Hash a byte array - This is the easiest and safest way to use SipHash.
+    #[inline]
+    pub fn hash(&self, bytes: &[u8]) -> Hash128 {
+        let mut hasher = self.hasher;
+        hasher.write(bytes);
+        hasher.finish128()
+    }
+}
+
+impl Hasher128 for SipHasher13 {
+    /// Return a 128-bit hash
+    #[inline]
+    fn finish128(&self) -> Hash128 {
+        self.hasher.finish128()
+    }
+}
+
+impl SipHasher24 {
+    /// Creates a new `SipHasher24` with the two initial keys set to 0.
+    #[inline]
+    pub fn new() -> SipHasher24 {
+        SipHasher24::new_with_keys(0, 0)
+    }
+
+    /// Creates a `SipHasher24` that is keyed off the provided keys.
+    #[inline]
+    pub fn new_with_keys(key0: u64, key1: u64) -> SipHasher24 {
+        SipHasher24 {
+            hasher: Hasher::new_with_keys(key0, key1),
+        }
+    }
+
+    /// Creates a `SipHasher24` from a 16 byte key.
+    pub fn new_with_key(key: &[u8; 16]) -> SipHasher24 {
+        let mut b0 = [0u8; 8];
+        let mut b1 = [0u8; 8];
+        b0.copy_from_slice(&key[0..8]);
+        b1.copy_from_slice(&key[8..16]);
+        let key0 = u64::from_le_bytes(b0);
+        let key1 = u64::from_le_bytes(b1);
+        Self::new_with_keys(key0, key1)
+    }
+
+    /// Get the keys used by this hasher
+    pub fn keys(&self) -> (u64, u64) {
+        (self.hasher.k0, self.hasher.k1)
+    }
+
+    /// Get the key used by this hasher as a 16 byte vector
+    pub fn key(&self) -> [u8; 16] {
+        let mut bytes = [0u8; 16];
+        bytes[0..8].copy_from_slice(&self.hasher.k0.to_le_bytes());
+        bytes[8..16].copy_from_slice(&self.hasher.k1.to_le_bytes());
+        bytes
+    }
+
+    /// Hash a byte array - This is the easiest and safest way to use SipHash.
+    #[inline]
+    pub fn hash(&self, bytes: &[u8]) -> Hash128 {
+        let mut hasher = self.hasher;
+        hasher.write(bytes);
+        hasher.finish128()
+    }
+}
+
+impl Hasher128 for SipHasher24 {
+    /// Return a 128-bit hash
+    #[inline]
+    fn finish128(&self) -> Hash128 {
+        self.hasher.finish128()
+    }
+}
+
+impl<S: Sip> Hasher<S> {
+    #[inline]
+    fn new_with_keys(key0: u64, key1: u64) -> Hasher<S> {
+        let mut state = Hasher {
+            k0: key0,
+            k1: key1,
+            length: 0,
+            state: State {
+                v0: 0,
+                v1: 0xee,
+                v2: 0,
+                v3: 0,
+            },
+            tail: 0,
+            ntail: 0,
+            _marker: PhantomData,
+        };
+        state.reset();
+        state
+    }
+
+    #[inline]
+    fn reset(&mut self) {
+        self.length = 0;
+        self.state.v0 = self.k0 ^ 0x736f6d6570736575;
+        self.state.v1 = self.k1 ^ 0x646f72616e646f83;
+        self.state.v2 = self.k0 ^ 0x6c7967656e657261;
+        self.state.v3 = self.k1 ^ 0x7465646279746573;
+        self.ntail = 0;
+    }
+
+    // A specialized write function for values with size <= 8.
+    //
+    // The hashing of multi-byte integers depends on endianness. E.g.:
+    // - little-endian: `write_u32(0xDDCCBBAA)` == `write([0xAA, 0xBB, 0xCC, 0xDD])`
+    // - big-endian:    `write_u32(0xDDCCBBAA)` == `write([0xDD, 0xCC, 0xBB, 0xAA])`
+    //
+    // This function does the right thing for little-endian hardware. On
+    // big-endian hardware `x` must be byte-swapped first to give the right
+    // behaviour. After any byte-swapping, the input must be zero-extended to
+    // 64-bits. The caller is responsible for the byte-swapping and
+    // zero-extension.
+    #[inline]
+    fn short_write<T>(&mut self, _x: T, x: u64) {
+        let size = mem::size_of::<T>();
+        self.length += size;
+
+        // The original number must be zero-extended, not sign-extended.
+        debug_assert!(if size < 8 { x >> (8 * size) == 0 } else { true });
+
+        // The number of bytes needed to fill `self.tail`.
+        let needed = 8 - self.ntail;
+
+        self.tail |= x << (8 * self.ntail);
+        if size < needed {
+            self.ntail += size;
+            return;
+        }
+
+        // `self.tail` is full, process it.
+        self.state.v3 ^= self.tail;
+        S::c_rounds(&mut self.state);
+        self.state.v0 ^= self.tail;
+
+        self.ntail = size - needed;
+        self.tail = if needed < 8 { x >> (8 * needed) } else { 0 };
+    }
+}
+
+impl<S: Sip> Hasher<S> {
+    #[inline]
+    pub fn finish128(&self) -> Hash128 {
+        let mut state = self.state;
+
+        let b: u64 = ((self.length as u64 & 0xff) << 56) | self.tail;
+
+        state.v3 ^= b;
+        S::c_rounds(&mut state);
+        state.v0 ^= b;
+
+        state.v2 ^= 0xee;
+        S::d_rounds(&mut state);
+        let h1 = state.v0 ^ state.v1 ^ state.v2 ^ state.v3;
+
+        state.v1 ^= 0xdd;
+        S::d_rounds(&mut state);
+        let h2 = state.v0 ^ state.v1 ^ state.v2 ^ state.v3;
+
+        Hash128 { h1, h2 }
+    }
+}
+
+impl hash::Hasher for SipHasher {
+    #[inline]
+    fn write(&mut self, msg: &[u8]) {
+        self.0.write(msg)
+    }
+
+    #[inline]
+    fn finish(&self) -> u64 {
+        self.0.finish()
+    }
+
+    #[inline]
+    fn write_usize(&mut self, i: usize) {
+        self.0.write_usize(i);
+    }
+
+    #[inline]
+    fn write_u8(&mut self, i: u8) {
+        self.0.write_u8(i);
+    }
+
+    #[inline]
+    fn write_u16(&mut self, i: u16) {
+        self.0.write_u16(i);
+    }
+
+    #[inline]
+    fn write_u32(&mut self, i: u32) {
+        self.0.write_u32(i);
+    }
+
+    #[inline]
+    fn write_u64(&mut self, i: u64) {
+        self.0.write_u64(i);
+    }
+}
+
+impl hash::Hasher for SipHasher13 {
+    #[inline]
+    fn write(&mut self, msg: &[u8]) {
+        self.hasher.write(msg)
+    }
+
+    #[inline]
+    fn finish(&self) -> u64 {
+        self.hasher.finish()
+    }
+
+    #[inline]
+    fn write_usize(&mut self, i: usize) {
+        self.hasher.write_usize(i);
+    }
+
+    #[inline]
+    fn write_u8(&mut self, i: u8) {
+        self.hasher.write_u8(i);
+    }
+
+    #[inline]
+    fn write_u16(&mut self, i: u16) {
+        self.hasher.write_u16(i);
+    }
+
+    #[inline]
+    fn write_u32(&mut self, i: u32) {
+        self.hasher.write_u32(i);
+    }
+
+    #[inline]
+    fn write_u64(&mut self, i: u64) {
+        self.hasher.write_u64(i);
+    }
+}
+
+impl hash::Hasher for SipHasher24 {
+    #[inline]
+    fn write(&mut self, msg: &[u8]) {
+        self.hasher.write(msg)
+    }
+
+    #[inline]
+    fn finish(&self) -> u64 {
+        self.hasher.finish()
+    }
+
+    #[inline]
+    fn write_usize(&mut self, i: usize) {
+        self.hasher.write_usize(i);
+    }
+
+    #[inline]
+    fn write_u8(&mut self, i: u8) {
+        self.hasher.write_u8(i);
+    }
+
+    #[inline]
+    fn write_u16(&mut self, i: u16) {
+        self.hasher.write_u16(i);
+    }
+
+    #[inline]
+    fn write_u32(&mut self, i: u32) {
+        self.hasher.write_u32(i);
+    }
+
+    #[inline]
+    fn write_u64(&mut self, i: u64) {
+        self.hasher.write_u64(i);
+    }
+}
+
+impl<S: Sip> hash::Hasher for Hasher<S> {
+    #[inline]
+    fn write_usize(&mut self, i: usize) {
+        self.short_write(i, i.to_le() as u64);
+    }
+
+    #[inline]
+    fn write_u8(&mut self, i: u8) {
+        self.short_write(i, i as u64);
+    }
+
+    #[inline]
+    fn write_u32(&mut self, i: u32) {
+        self.short_write(i, i.to_le() as u64);
+    }
+
+    #[inline]
+    fn write_u64(&mut self, i: u64) {
+        self.short_write(i, i.to_le());
+    }
+
+    #[inline]
+    fn write(&mut self, msg: &[u8]) {
+        let length = msg.len();
+        self.length += length;
+
+        let mut needed = 0;
+
+        if self.ntail != 0 {
+            needed = 8 - self.ntail;
+            self.tail |= unsafe { u8to64_le(msg, 0, cmp::min(length, needed)) } << (8 * self.ntail);
+            if length < needed {
+                self.ntail += length;
+                return;
+            } else {
+                self.state.v3 ^= self.tail;
+                S::c_rounds(&mut self.state);
+                self.state.v0 ^= self.tail;
+                self.ntail = 0;
+            }
+        }
+
+        // Buffered tail is now flushed, process new input.
+        let len = length - needed;
+        let left = len & 0x7;
+
+        let mut i = needed;
+        while i < len - left {
+            let mi = unsafe { load_int_le!(msg, i, u64) };
+
+            self.state.v3 ^= mi;
+            S::c_rounds(&mut self.state);
+            self.state.v0 ^= mi;
+
+            i += 8;
+        }
+
+        self.tail = unsafe { u8to64_le(msg, i, left) };
+        self.ntail = left;
+    }
+
+    #[inline]
+    fn finish(&self) -> u64 {
+        self.finish128().h2
+    }
+}
+
+impl<S: Sip> Clone for Hasher<S> {
+    #[inline]
+    fn clone(&self) -> Hasher<S> {
+        Hasher {
+            k0: self.k0,
+            k1: self.k1,
+            length: self.length,
+            state: self.state,
+            tail: self.tail,
+            ntail: self.ntail,
+            _marker: self._marker,
+        }
+    }
+}
+
+impl<S: Sip> Default for Hasher<S> {
+    /// Creates a `Hasher<S>` with the two initial keys set to 0.
+    #[inline]
+    fn default() -> Hasher<S> {
+        Hasher::new_with_keys(0, 0)
+    }
+}
+
+#[doc(hidden)]
+trait Sip {
+    fn c_rounds(_: &mut State);
+    fn d_rounds(_: &mut State);
+}
+
+#[derive(Debug, Clone, Copy, Default)]
+struct Sip13Rounds;
+
+impl Sip for Sip13Rounds {
+    #[inline]
+    fn c_rounds(state: &mut State) {
+        compress!(state);
+    }
+
+    #[inline]
+    fn d_rounds(state: &mut State) {
+        compress!(state);
+        compress!(state);
+        compress!(state);
+    }
+}
+
+#[derive(Debug, Clone, Copy, Default)]
+struct Sip24Rounds;
+
+impl Sip for Sip24Rounds {
+    #[inline]
+    fn c_rounds(state: &mut State) {
+        compress!(state);
+        compress!(state);
+    }
+
+    #[inline]
+    fn d_rounds(state: &mut State) {
+        compress!(state);
+        compress!(state);
+        compress!(state);
+        compress!(state);
+    }
+}
+
+impl Hash128 {
+    /// Convert into a 16-bytes vector
+    pub fn as_bytes(&self) -> [u8; 16] {
+        let mut bytes = [0u8; 16];
+        let h1 = self.h1.to_le();
+        let h2 = self.h2.to_le();
+        unsafe {
+            ptr::copy_nonoverlapping(&h1 as *const _ as *const u8, bytes.as_mut_ptr(), 8);
+            ptr::copy_nonoverlapping(&h2 as *const _ as *const u8, bytes.as_mut_ptr().add(8), 8);
+        }
+        bytes
+    }
+
+    /// Convert into a `u128`
+    #[inline]
+    pub fn as_u128(&self) -> u128 {
+        let h1 = self.h1.to_le();
+        let h2 = self.h2.to_le();
+        h1 as u128 | ((h2 as u128) << 64)
+    }
+
+    /// Convert into `(u64, u64)`
+    #[inline]
+    pub fn as_u64(&self) -> (u64, u64) {
+        let h1 = self.h1.to_le();
+        let h2 = self.h2.to_le();
+        (h1, h2)
+    }
+}
diff --git a/src/tests.rs b/src/tests.rs
new file mode 100644
index 0000000..48dd48c
--- /dev/null
+++ b/src/tests.rs
@@ -0,0 +1,332 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::hash::{Hash, Hasher};
+
+use super::sip::{SipHasher, SipHasher13, SipHasher24};
+
+// Hash just the bytes of the slice, without length prefix
+struct Bytes<'a>(&'a [u8]);
+
+impl<'a> Hash for Bytes<'a> {
+    #[allow(unused_must_use)]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        let Bytes(v) = *self;
+        state.write(v);
+    }
+}
+
+macro_rules! u8to64_le {
+    ($buf:expr, $i:expr) => {
+        $buf[0 + $i] as u64
+            | ($buf[1 + $i] as u64) << 8
+            | ($buf[2 + $i] as u64) << 16
+            | ($buf[3 + $i] as u64) << 24
+            | ($buf[4 + $i] as u64) << 32
+            | ($buf[5 + $i] as u64) << 40
+            | ($buf[6 + $i] as u64) << 48
+            | ($buf[7 + $i] as u64) << 56
+    };
+    ($buf:expr, $i:expr, $len:expr) => {{
+        let mut t = 0;
+        let mut out = 0;
+        while t < $len {
+            out |= ($buf[t + $i] as u64) << t * 8;
+            t += 1;
+        }
+        out
+    }};
+}
+
+fn hash_with<H: Hasher, T: Hash>(mut st: H, x: &T) -> u64 {
+    x.hash(&mut st);
+    st.finish()
+}
+
+fn hash<T: Hash>(x: &T) -> u64 {
+    hash_with(SipHasher::new(), x)
+}
+
+#[test]
+#[allow(unused_must_use)]
+fn test_siphash_1_3() {
+    let vecs: [[u8; 8]; 64] = [
+        [0xdc, 0xc4, 0x0f, 0x05, 0x58, 0x01, 0xac, 0xab],
+        [0x93, 0xca, 0x57, 0x7d, 0xf3, 0x9b, 0xf4, 0xc9],
+        [0x4d, 0xd4, 0xc7, 0x4d, 0x02, 0x9b, 0xcb, 0x82],
+        [0xfb, 0xf7, 0xdd, 0xe7, 0xb8, 0x0a, 0xf8, 0x8b],
+        [0x28, 0x83, 0xd3, 0x88, 0x60, 0x57, 0x75, 0xcf],
+        [0x67, 0x3b, 0x53, 0x49, 0x2f, 0xd5, 0xf9, 0xde],
+        [0xa7, 0x22, 0x9f, 0xc5, 0x50, 0x2b, 0x0d, 0xc5],
+        [0x40, 0x11, 0xb1, 0x9b, 0x98, 0x7d, 0x92, 0xd3],
+        [0x8e, 0x9a, 0x29, 0x8d, 0x11, 0x95, 0x90, 0x36],
+        [0xe4, 0x3d, 0x06, 0x6c, 0xb3, 0x8e, 0xa4, 0x25],
+        [0x7f, 0x09, 0xff, 0x92, 0xee, 0x85, 0xde, 0x79],
+        [0x52, 0xc3, 0x4d, 0xf9, 0xc1, 0x18, 0xc1, 0x70],
+        [0xa2, 0xd9, 0xb4, 0x57, 0xb1, 0x84, 0xa3, 0x78],
+        [0xa7, 0xff, 0x29, 0x12, 0x0c, 0x76, 0x6f, 0x30],
+        [0x34, 0x5d, 0xf9, 0xc0, 0x11, 0xa1, 0x5a, 0x60],
+        [0x56, 0x99, 0x51, 0x2a, 0x6d, 0xd8, 0x20, 0xd3],
+        [0x66, 0x8b, 0x90, 0x7d, 0x1a, 0xdd, 0x4f, 0xcc],
+        [0x0c, 0xd8, 0xdb, 0x63, 0x90, 0x68, 0xf2, 0x9c],
+        [0x3e, 0xe6, 0x73, 0xb4, 0x9c, 0x38, 0xfc, 0x8f],
+        [0x1c, 0x7d, 0x29, 0x8d, 0xe5, 0x9d, 0x1f, 0xf2],
+        [0x40, 0xe0, 0xcc, 0xa6, 0x46, 0x2f, 0xdc, 0xc0],
+        [0x44, 0xf8, 0x45, 0x2b, 0xfe, 0xab, 0x92, 0xb9],
+        [0x2e, 0x87, 0x20, 0xa3, 0x9b, 0x7b, 0xfe, 0x7f],
+        [0x23, 0xc1, 0xe6, 0xda, 0x7f, 0x0e, 0x5a, 0x52],
+        [0x8c, 0x9c, 0x34, 0x67, 0xb2, 0xae, 0x64, 0xf4],
+        [0x79, 0x09, 0x5b, 0x70, 0x28, 0x59, 0xcd, 0x45],
+        [0xa5, 0x13, 0x99, 0xca, 0xe3, 0x35, 0x3e, 0x3a],
+        [0x35, 0x3b, 0xde, 0x4a, 0x4e, 0xc7, 0x1d, 0xa9],
+        [0x0d, 0xd0, 0x6c, 0xef, 0x02, 0xed, 0x0b, 0xfb],
+        [0xf4, 0xe1, 0xb1, 0x4a, 0xb4, 0x3c, 0xd9, 0x88],
+        [0x63, 0xe6, 0xc5, 0x43, 0xd6, 0x11, 0x0f, 0x54],
+        [0xbc, 0xd1, 0x21, 0x8c, 0x1f, 0xdd, 0x70, 0x23],
+        [0x0d, 0xb6, 0xa7, 0x16, 0x6c, 0x7b, 0x15, 0x81],
+        [0xbf, 0xf9, 0x8f, 0x7a, 0xe5, 0xb9, 0x54, 0x4d],
+        [0x3e, 0x75, 0x2a, 0x1f, 0x78, 0x12, 0x9f, 0x75],
+        [0x91, 0x6b, 0x18, 0xbf, 0xbe, 0xa3, 0xa1, 0xce],
+        [0x06, 0x62, 0xa2, 0xad, 0xd3, 0x08, 0xf5, 0x2c],
+        [0x57, 0x30, 0xc3, 0xa3, 0x2d, 0x1c, 0x10, 0xb6],
+        [0xa1, 0x36, 0x3a, 0xae, 0x96, 0x74, 0xf4, 0xb3],
+        [0x92, 0x83, 0x10, 0x7b, 0x54, 0x57, 0x6b, 0x62],
+        [0x31, 0x15, 0xe4, 0x99, 0x32, 0x36, 0xd2, 0xc1],
+        [0x44, 0xd9, 0x1a, 0x3f, 0x92, 0xc1, 0x7c, 0x66],
+        [0x25, 0x88, 0x13, 0xc8, 0xfe, 0x4f, 0x70, 0x65],
+        [0xa6, 0x49, 0x89, 0xc2, 0xd1, 0x80, 0xf2, 0x24],
+        [0x6b, 0x87, 0xf8, 0xfa, 0xed, 0x1c, 0xca, 0xc2],
+        [0x96, 0x21, 0x04, 0x9f, 0xfc, 0x4b, 0x16, 0xc2],
+        [0x23, 0xd6, 0xb1, 0x68, 0x93, 0x9c, 0x6e, 0xa1],
+        [0xfd, 0x14, 0x51, 0x8b, 0x9c, 0x16, 0xfb, 0x49],
+        [0x46, 0x4c, 0x07, 0xdf, 0xf8, 0x43, 0x31, 0x9f],
+        [0xb3, 0x86, 0xcc, 0x12, 0x24, 0xaf, 0xfd, 0xc6],
+        [0x8f, 0x09, 0x52, 0x0a, 0xd1, 0x49, 0xaf, 0x7e],
+        [0x9a, 0x2f, 0x29, 0x9d, 0x55, 0x13, 0xf3, 0x1c],
+        [0x12, 0x1f, 0xf4, 0xa2, 0xdd, 0x30, 0x4a, 0xc4],
+        [0xd0, 0x1e, 0xa7, 0x43, 0x89, 0xe9, 0xfa, 0x36],
+        [0xe6, 0xbc, 0xf0, 0x73, 0x4c, 0xb3, 0x8f, 0x31],
+        [0x80, 0xe9, 0xa7, 0x70, 0x36, 0xbf, 0x7a, 0xa2],
+        [0x75, 0x6d, 0x3c, 0x24, 0xdb, 0xc0, 0xbc, 0xb4],
+        [0x13, 0x15, 0xb7, 0xfd, 0x52, 0xd8, 0xf8, 0x23],
+        [0x08, 0x8a, 0x7d, 0xa6, 0x4d, 0x5f, 0x03, 0x8f],
+        [0x48, 0xf1, 0xe8, 0xb7, 0xe5, 0xd0, 0x9c, 0xd8],
+        [0xee, 0x44, 0xa6, 0xf7, 0xbc, 0xe6, 0xf4, 0xf6],
+        [0xf2, 0x37, 0x18, 0x0f, 0xd8, 0x9a, 0xc5, 0xae],
+        [0xe0, 0x94, 0x66, 0x4b, 0x15, 0xf6, 0xb2, 0xc3],
+        [0xa8, 0xb3, 0xbb, 0xb7, 0x62, 0x90, 0x19, 0x9d],
+    ];
+
+    let k0 = 0x_07_06_05_04_03_02_01_00;
+    let k1 = 0x_0f_0e_0d_0c_0b_0a_09_08;
+    let mut buf = Vec::new();
+    let mut t = 0;
+    let mut state_inc = SipHasher13::new_with_keys(k0, k1);
+
+    while t < 64 {
+        let vec = u8to64_le!(vecs[t], 0);
+        let out = hash_with(SipHasher13::new_with_keys(k0, k1), &Bytes(&buf));
+        assert_eq!(vec, out);
+
+        let full = hash_with(SipHasher13::new_with_keys(k0, k1), &Bytes(&buf));
+        let i = state_inc.finish();
+
+        assert_eq!(full, i);
+        assert_eq!(full, vec);
+
+        buf.push(t as u8);
+        Hasher::write(&mut state_inc, &[t as u8]);
+
+        t += 1;
+    }
+}
+
+#[test]
+#[allow(unused_must_use)]
+fn test_siphash_2_4() {
+    let vecs: [[u8; 8]; 64] = [
+        [0x31, 0x0e, 0x0e, 0xdd, 0x47, 0xdb, 0x6f, 0x72],
+        [0xfd, 0x67, 0xdc, 0x93, 0xc5, 0x39, 0xf8, 0x74],
+        [0x5a, 0x4f, 0xa9, 0xd9, 0x09, 0x80, 0x6c, 0x0d],
+        [0x2d, 0x7e, 0xfb, 0xd7, 0x96, 0x66, 0x67, 0x85],
+        [0xb7, 0x87, 0x71, 0x27, 0xe0, 0x94, 0x27, 0xcf],
+        [0x8d, 0xa6, 0x99, 0xcd, 0x64, 0x55, 0x76, 0x18],
+        [0xce, 0xe3, 0xfe, 0x58, 0x6e, 0x46, 0xc9, 0xcb],
+        [0x37, 0xd1, 0x01, 0x8b, 0xf5, 0x00, 0x02, 0xab],
+        [0x62, 0x24, 0x93, 0x9a, 0x79, 0xf5, 0xf5, 0x93],
+        [0xb0, 0xe4, 0xa9, 0x0b, 0xdf, 0x82, 0x00, 0x9e],
+        [0xf3, 0xb9, 0xdd, 0x94, 0xc5, 0xbb, 0x5d, 0x7a],
+        [0xa7, 0xad, 0x6b, 0x22, 0x46, 0x2f, 0xb3, 0xf4],
+        [0xfb, 0xe5, 0x0e, 0x86, 0xbc, 0x8f, 0x1e, 0x75],
+        [0x90, 0x3d, 0x84, 0xc0, 0x27, 0x56, 0xea, 0x14],
+        [0xee, 0xf2, 0x7a, 0x8e, 0x90, 0xca, 0x23, 0xf7],
+        [0xe5, 0x45, 0xbe, 0x49, 0x61, 0xca, 0x29, 0xa1],
+        [0xdb, 0x9b, 0xc2, 0x57, 0x7f, 0xcc, 0x2a, 0x3f],
+        [0x94, 0x47, 0xbe, 0x2c, 0xf5, 0xe9, 0x9a, 0x69],
+        [0x9c, 0xd3, 0x8d, 0x96, 0xf0, 0xb3, 0xc1, 0x4b],
+        [0xbd, 0x61, 0x79, 0xa7, 0x1d, 0xc9, 0x6d, 0xbb],
+        [0x98, 0xee, 0xa2, 0x1a, 0xf2, 0x5c, 0xd6, 0xbe],
+        [0xc7, 0x67, 0x3b, 0x2e, 0xb0, 0xcb, 0xf2, 0xd0],
+        [0x88, 0x3e, 0xa3, 0xe3, 0x95, 0x67, 0x53, 0x93],
+        [0xc8, 0xce, 0x5c, 0xcd, 0x8c, 0x03, 0x0c, 0xa8],
+        [0x94, 0xaf, 0x49, 0xf6, 0xc6, 0x50, 0xad, 0xb8],
+        [0xea, 0xb8, 0x85, 0x8a, 0xde, 0x92, 0xe1, 0xbc],
+        [0xf3, 0x15, 0xbb, 0x5b, 0xb8, 0x35, 0xd8, 0x17],
+        [0xad, 0xcf, 0x6b, 0x07, 0x63, 0x61, 0x2e, 0x2f],
+        [0xa5, 0xc9, 0x1d, 0xa7, 0xac, 0xaa, 0x4d, 0xde],
+        [0x71, 0x65, 0x95, 0x87, 0x66, 0x50, 0xa2, 0xa6],
+        [0x28, 0xef, 0x49, 0x5c, 0x53, 0xa3, 0x87, 0xad],
+        [0x42, 0xc3, 0x41, 0xd8, 0xfa, 0x92, 0xd8, 0x32],
+        [0xce, 0x7c, 0xf2, 0x72, 0x2f, 0x51, 0x27, 0x71],
+        [0xe3, 0x78, 0x59, 0xf9, 0x46, 0x23, 0xf3, 0xa7],
+        [0x38, 0x12, 0x05, 0xbb, 0x1a, 0xb0, 0xe0, 0x12],
+        [0xae, 0x97, 0xa1, 0x0f, 0xd4, 0x34, 0xe0, 0x15],
+        [0xb4, 0xa3, 0x15, 0x08, 0xbe, 0xff, 0x4d, 0x31],
+        [0x81, 0x39, 0x62, 0x29, 0xf0, 0x90, 0x79, 0x02],
+        [0x4d, 0x0c, 0xf4, 0x9e, 0xe5, 0xd4, 0xdc, 0xca],
+        [0x5c, 0x73, 0x33, 0x6a, 0x76, 0xd8, 0xbf, 0x9a],
+        [0xd0, 0xa7, 0x04, 0x53, 0x6b, 0xa9, 0x3e, 0x0e],
+        [0x92, 0x59, 0x58, 0xfc, 0xd6, 0x42, 0x0c, 0xad],
+        [0xa9, 0x15, 0xc2, 0x9b, 0xc8, 0x06, 0x73, 0x18],
+        [0x95, 0x2b, 0x79, 0xf3, 0xbc, 0x0a, 0xa6, 0xd4],
+        [0xf2, 0x1d, 0xf2, 0xe4, 0x1d, 0x45, 0x35, 0xf9],
+        [0x87, 0x57, 0x75, 0x19, 0x04, 0x8f, 0x53, 0xa9],
+        [0x10, 0xa5, 0x6c, 0xf5, 0xdf, 0xcd, 0x9a, 0xdb],
+        [0xeb, 0x75, 0x09, 0x5c, 0xcd, 0x98, 0x6c, 0xd0],
+        [0x51, 0xa9, 0xcb, 0x9e, 0xcb, 0xa3, 0x12, 0xe6],
+        [0x96, 0xaf, 0xad, 0xfc, 0x2c, 0xe6, 0x66, 0xc7],
+        [0x72, 0xfe, 0x52, 0x97, 0x5a, 0x43, 0x64, 0xee],
+        [0x5a, 0x16, 0x45, 0xb2, 0x76, 0xd5, 0x92, 0xa1],
+        [0xb2, 0x74, 0xcb, 0x8e, 0xbf, 0x87, 0x87, 0x0a],
+        [0x6f, 0x9b, 0xb4, 0x20, 0x3d, 0xe7, 0xb3, 0x81],
+        [0xea, 0xec, 0xb2, 0xa3, 0x0b, 0x22, 0xa8, 0x7f],
+        [0x99, 0x24, 0xa4, 0x3c, 0xc1, 0x31, 0x57, 0x24],
+        [0xbd, 0x83, 0x8d, 0x3a, 0xaf, 0xbf, 0x8d, 0xb7],
+        [0x0b, 0x1a, 0x2a, 0x32, 0x65, 0xd5, 0x1a, 0xea],
+        [0x13, 0x50, 0x79, 0xa3, 0x23, 0x1c, 0xe6, 0x60],
+        [0x93, 0x2b, 0x28, 0x46, 0xe4, 0xd7, 0x06, 0x66],
+        [0xe1, 0x91, 0x5f, 0x5c, 0xb1, 0xec, 0xa4, 0x6c],
+        [0xf3, 0x25, 0x96, 0x5c, 0xa1, 0x6d, 0x62, 0x9f],
+        [0x57, 0x5f, 0xf2, 0x8e, 0x60, 0x38, 0x1b, 0xe5],
+        [0x72, 0x45, 0x06, 0xeb, 0x4c, 0x32, 0x8a, 0x95],
+    ];
+
+    let k0 = 0x_07_06_05_04_03_02_01_00;
+    let k1 = 0x_0f_0e_0d_0c_0b_0a_09_08;
+    let mut buf = Vec::new();
+    let mut t = 0;
+    let mut state_inc = SipHasher24::new_with_keys(k0, k1);
+
+    while t < 64 {
+        let vec = u8to64_le!(vecs[t], 0);
+        let out = hash_with(SipHasher24::new_with_keys(k0, k1), &Bytes(&buf));
+        assert_eq!(vec, out);
+
+        let full = hash_with(SipHasher24::new_with_keys(k0, k1), &Bytes(&buf));
+        let i = state_inc.finish();
+
+        assert_eq!(full, i);
+        assert_eq!(full, vec);
+
+        buf.push(t as u8);
+        Hasher::write(&mut state_inc, &[t as u8]);
+
+        t += 1;
+    }
+}
+#[test]
+fn test_hash_idempotent() {
+    let val64 = 0xdead_beef_dead_beef_u64;
+    assert_eq!(hash(&val64), hash(&val64));
+    let val32 = 0xdeadbeef_u32;
+    assert_eq!(hash(&val32), hash(&val32));
+}
+
+#[test]
+fn test_hash_no_bytes_dropped_64() {
+    let val = 0xdead_beef_dead_beef_u64;
+
+    assert_ne!(hash(&val), hash(&zero_byte(val, 0)));
+    assert_ne!(hash(&val), hash(&zero_byte(val, 1)));
+    assert_ne!(hash(&val), hash(&zero_byte(val, 2)));
+    assert_ne!(hash(&val), hash(&zero_byte(val, 3)));
+    assert_ne!(hash(&val), hash(&zero_byte(val, 4)));
+    assert_ne!(hash(&val), hash(&zero_byte(val, 5)));
+    assert_ne!(hash(&val), hash(&zero_byte(val, 6)));
+    assert_ne!(hash(&val), hash(&zero_byte(val, 7)));
+
+    fn zero_byte(val: u64, byte: usize) -> u64 {
+        assert!(byte < 8);
+        val & !(0xff << (byte * 8))
+    }
+}
+
+#[test]
+fn test_hash_no_bytes_dropped_32() {
+    let val = 0xdeadbeef_u32;
+
+    assert_ne!(hash(&val), hash(&zero_byte(val, 0)));
+    assert_ne!(hash(&val), hash(&zero_byte(val, 1)));
+    assert_ne!(hash(&val), hash(&zero_byte(val, 2)));
+    assert_ne!(hash(&val), hash(&zero_byte(val, 3)));
+
+    fn zero_byte(val: u32, byte: usize) -> u32 {
+        assert!(byte < 4);
+        val & !(0xff << (byte * 8))
+    }
+}
+
+#[test]
+fn test_hash_no_concat_alias() {
+    let s = ("aa", "bb");
+    let t = ("aabb", "");
+    let u = ("a", "abb");
+
+    assert!(s != t && t != u);
+    assert!(hash(&s) != hash(&t) && hash(&s) != hash(&u));
+
+    let u = [1, 0, 0, 0];
+    let v = (&u[..1], &u[1..3], &u[3..]);
+    let w = (&u[..], &u[4..4], &u[4..4]);
+
+    assert_ne!(v, w);
+    assert_ne!(hash(&v), hash(&w));
+}
+
+#[test]
+fn test_hash_simple() {
+    let array: &[u8] = &[1, 2, 3];
+    let key: &[u8; 16] = &[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
+    let hasher = SipHasher13::new_with_key(key);
+    let h = hasher.hash(array);
+    _ = h;
+}
+
+#[test]
+fn test_hash_incremental() {
+    let array1: &[u8] = &[1, 2, 3];
+    let array2: &[u8] = &[4, 5, 6];
+    let key: &[u8; 16] = &[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
+    let mut hasher = SipHasher13::new_with_key(key);
+    hasher.write(array1);
+    hasher.write(array2);
+    let h = hasher.finish();
+    _ = h;
+}
+
+#[test]
+#[cfg(all(feature = "serde", feature = "serde_json"))]
+fn test_hash_serde() {
+    let val64 = 0xdead_beef_dead_beef_u64;
+    let hash = hash(&val64);
+    let serialized = serde_json::to_string(&hash).unwrap();
+    let deserialized: u64 = serde_json::from_str(&serialized).unwrap();
+    assert_eq!(hash, deserialized);
+}
diff --git a/src/tests128.rs b/src/tests128.rs
new file mode 100644
index 0000000..c1711b7
--- /dev/null
+++ b/src/tests128.rs
@@ -0,0 +1,134 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::hash::{Hash, Hasher};
+
+use super::sip128::{Hasher128, SipHasher, SipHasher13, SipHasher24};
+
+// Hash just the bytes of the slice, without length prefix
+struct Bytes<'a>(&'a [u8]);
+
+impl<'a> Hash for Bytes<'a> {
+    #[allow(unused_must_use)]
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        let Bytes(v) = *self;
+        state.write(v);
+    }
+}
+
+fn hash_with<H: Hasher + Hasher128, T: Hash>(mut st: H, x: &T) -> [u8; 16] {
+    x.hash(&mut st);
+    st.finish128().as_bytes()
+}
+
+fn hash<T: Hash>(x: &T) -> [u8; 16] {
+    hash_with(SipHasher::new(), x)
+}
+
+#[test]
+fn test_siphash128_idempotent() {
+    let val64 = 0xdead_beef_dead_beef_u64;
+    assert_eq!(hash(&val64), hash(&val64));
+    let val32 = 0xdeadbeef_u32;
+    assert_eq!(hash(&val32), hash(&val32));
+}
+
+#[test]
+#[allow(unused_must_use)]
+fn test_siphash128_1_3() {
+    let vecs: [[u8; 16]; 1] = [[
+        231, 126, 188, 178, 39, 136, 165, 190, 253, 98, 219, 106, 221, 48, 48, 1,
+    ]];
+
+    let k0 = 0x_07_06_05_04_03_02_01_00;
+    let k1 = 0x_0f_0e_0d_0c_0b_0a_09_08;
+    let mut buf = Vec::new();
+    let mut t = 0;
+    let mut state_inc = SipHasher13::new_with_keys(k0, k1);
+
+    while t < 1 {
+        let vec = vecs[t];
+        let out = hash_with(SipHasher13::new_with_keys(k0, k1), &Bytes(&buf));
+        assert_eq!(vec, out[..]);
+
+        let full = hash_with(SipHasher13::new_with_keys(k0, k1), &Bytes(&buf));
+        let i = state_inc.finish128().as_bytes();
+
+        assert_eq!(full, i);
+        assert_eq!(full, vec);
+
+        buf.push(t as u8);
+        Hasher::write(&mut state_inc, &[t as u8]);
+
+        t += 1;
+    }
+}
+
+#[test]
+#[allow(unused_must_use)]
+fn test_siphash128_2_4() {
+    let vecs: [[u8; 16]; 1] = [[
+        163, 129, 127, 4, 186, 37, 168, 230, 109, 246, 114, 20, 199, 85, 2, 147,
+    ]];
+
+    let k0 = 0x_07_06_05_04_03_02_01_00;
+    let k1 = 0x_0f_0e_0d_0c_0b_0a_09_08;
+    let mut buf = Vec::new();
+    let mut t = 0;
+    let mut state_inc = SipHasher24::new_with_keys(k0, k1);
+
+    while t < 1 {
+        let vec = vecs[t];
+        let out = hash_with(SipHasher24::new_with_keys(k0, k1), &Bytes(&buf));
+        assert_eq!(vec, out[..]);
+
+        let full = hash_with(SipHasher24::new_with_keys(k0, k1), &Bytes(&buf));
+        let i = state_inc.finish128().as_bytes();
+
+        assert_eq!(full, i);
+        assert_eq!(full, vec);
+
+        buf.push(t as u8);
+        Hasher::write(&mut state_inc, &[t as u8]);
+
+        t += 1;
+    }
+}
+
+#[test]
+fn test_siphash128_simple() {
+    let array: &[u8] = &[1, 2, 3];
+    let key: &[u8; 16] = &[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
+    let hasher = SipHasher13::new_with_key(key);
+    let h = hasher.hash(array).as_bytes();
+    _ = h;
+}
+
+#[test]
+fn test_siphash128_incremental() {
+    let array1: &[u8] = &[1, 2, 3];
+    let array2: &[u8] = &[4, 5, 6];
+    let key: &[u8; 16] = &[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16];
+    let mut hasher = SipHasher13::new_with_key(key);
+    hasher.write(array1);
+    hasher.write(array2);
+    let h = hasher.finish128().as_bytes();
+    _ = h;
+}
+
+#[test]
+#[cfg(all(feature = "serde", feature = "serde_json"))]
+fn test_siphash128_serde() {
+    let val64 = 0xdead_beef_dead_beef_u64;
+    let hash = hash(&val64);
+    let serialized = serde_json::to_string(&hash).unwrap();
+    let deserialized: [u8; 16] = serde_json::from_str(&serialized).unwrap();
+    assert_eq!(hash, deserialized);
+}