use std::cmp;
use std::hash::Hasher;
-use std::slice;
-use std::ptr;
use std::mem;
+use std::ptr;
+use std::slice;
+
+#[cfg(test)]
+mod tests;
#[derive(Debug, Clone)]
pub struct SipHasher128 {
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
+ state: State, // hash State
+ tail: u64, // unprocessed bytes le
+ ntail: usize, // how many bytes in tail are valid
}
#[derive(Debug, Clone, Copy)]
}
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 ^= $v0;
+ ($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 = $v2.wrapping_add($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 = $v2.rotate_left(32);
- });
+ }};
}
/// Loads an integer of the desired type from a byte stream, in LE order. Uses
///
/// Unsafe because: unchecked indexing at i..i+size_of(int_ty)
macro_rules! load_int_le {
- ($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.get_unchecked($i),
- &mut data as *mut _ as *mut u8,
- mem::size_of::<$int_ty>());
- data.to_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(
+ $buf.get_unchecked($i),
+ &mut data as *mut _ as *mut u8,
+ mem::size_of::<$int_ty>(),
+ );
+ data.to_le()
+ }};
}
/// Loads an u64 using up to 7 bytes of a byte slice.
out
}
-
impl SipHasher128 {
#[inline]
pub fn new_with_keys(key0: u64, key1: u64) -> SipHasher128 {
k0: key0,
k1: key1,
length: 0,
- state: State {
- v0: 0,
- v1: 0,
- v2: 0,
- v3: 0,
- },
+ state: State { v0: 0, v1: 0, v2: 0, v3: 0 },
tail: 0,
ntail: 0,
};
#[inline(always)]
fn short_write_gen<T>(&mut self, x: T) {
- let bytes = unsafe {
- slice::from_raw_parts(&x as *const T as *const u8, mem::size_of::<T>())
- };
+ let bytes =
+ unsafe { slice::from_raw_parts(&x as *const T as *const u8, mem::size_of::<T>()) };
self.short_write(bytes);
}
self.tail |= unsafe { u8to64_le(msg, 0, cmp::min(length, needed)) } << (8 * self.ntail);
if length < needed {
self.ntail += length;
- return
+ return;
} else {
self.state.v3 ^= self.tail;
Sip24Rounds::c_rounds(&mut self.state);
compress!(state);
}
}
-
-#[cfg(test)]
-mod test {
- use std::hash::{Hash, Hasher};
- use std::{slice, mem};
- use super::SipHasher128;
-
- // 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) {
- for byte in self.0 {
- state.write_u8(*byte);
- }
- }
- }
-
- fn hash_with<T: Hash>(mut st: SipHasher128, x: &T) -> (u64, u64) {
- x.hash(&mut st);
- st.finish128()
- }
-
- fn hash<T: Hash>(x: &T) -> (u64, u64) {
- hash_with(SipHasher128::new_with_keys(0, 0), x)
- }
-
- const TEST_VECTOR : [[u8; 16]; 64] = [
- [0xa3,0x81,0x7f,0x04,0xba,0x25,0xa8,0xe6,0x6d,0xf6,0x72,0x14,0xc7,0x55,0x02,0x93],
- [0xda,0x87,0xc1,0xd8,0x6b,0x99,0xaf,0x44,0x34,0x76,0x59,0x11,0x9b,0x22,0xfc,0x45],
- [0x81,0x77,0x22,0x8d,0xa4,0xa4,0x5d,0xc7,0xfc,0xa3,0x8b,0xde,0xf6,0x0a,0xff,0xe4],
- [0x9c,0x70,0xb6,0x0c,0x52,0x67,0xa9,0x4e,0x5f,0x33,0xb6,0xb0,0x29,0x85,0xed,0x51],
- [0xf8,0x81,0x64,0xc1,0x2d,0x9c,0x8f,0xaf,0x7d,0x0f,0x6e,0x7c,0x7b,0xcd,0x55,0x79],
- [0x13,0x68,0x87,0x59,0x80,0x77,0x6f,0x88,0x54,0x52,0x7a,0x07,0x69,0x0e,0x96,0x27],
- [0x14,0xee,0xca,0x33,0x8b,0x20,0x86,0x13,0x48,0x5e,0xa0,0x30,0x8f,0xd7,0xa1,0x5e],
- [0xa1,0xf1,0xeb,0xbe,0xd8,0xdb,0xc1,0x53,0xc0,0xb8,0x4a,0xa6,0x1f,0xf0,0x82,0x39],
- [0x3b,0x62,0xa9,0xba,0x62,0x58,0xf5,0x61,0x0f,0x83,0xe2,0x64,0xf3,0x14,0x97,0xb4],
- [0x26,0x44,0x99,0x06,0x0a,0xd9,0xba,0xab,0xc4,0x7f,0x8b,0x02,0xbb,0x6d,0x71,0xed],
- [0x00,0x11,0x0d,0xc3,0x78,0x14,0x69,0x56,0xc9,0x54,0x47,0xd3,0xf3,0xd0,0xfb,0xba],
- [0x01,0x51,0xc5,0x68,0x38,0x6b,0x66,0x77,0xa2,0xb4,0xdc,0x6f,0x81,0xe5,0xdc,0x18],
- [0xd6,0x26,0xb2,0x66,0x90,0x5e,0xf3,0x58,0x82,0x63,0x4d,0xf6,0x85,0x32,0xc1,0x25],
- [0x98,0x69,0xe2,0x47,0xe9,0xc0,0x8b,0x10,0xd0,0x29,0x93,0x4f,0xc4,0xb9,0x52,0xf7],
- [0x31,0xfc,0xef,0xac,0x66,0xd7,0xde,0x9c,0x7e,0xc7,0x48,0x5f,0xe4,0x49,0x49,0x02],
- [0x54,0x93,0xe9,0x99,0x33,0xb0,0xa8,0x11,0x7e,0x08,0xec,0x0f,0x97,0xcf,0xc3,0xd9],
- [0x6e,0xe2,0xa4,0xca,0x67,0xb0,0x54,0xbb,0xfd,0x33,0x15,0xbf,0x85,0x23,0x05,0x77],
- [0x47,0x3d,0x06,0xe8,0x73,0x8d,0xb8,0x98,0x54,0xc0,0x66,0xc4,0x7a,0xe4,0x77,0x40],
- [0xa4,0x26,0xe5,0xe4,0x23,0xbf,0x48,0x85,0x29,0x4d,0xa4,0x81,0xfe,0xae,0xf7,0x23],
- [0x78,0x01,0x77,0x31,0xcf,0x65,0xfa,0xb0,0x74,0xd5,0x20,0x89,0x52,0x51,0x2e,0xb1],
- [0x9e,0x25,0xfc,0x83,0x3f,0x22,0x90,0x73,0x3e,0x93,0x44,0xa5,0xe8,0x38,0x39,0xeb],
- [0x56,0x8e,0x49,0x5a,0xbe,0x52,0x5a,0x21,0x8a,0x22,0x14,0xcd,0x3e,0x07,0x1d,0x12],
- [0x4a,0x29,0xb5,0x45,0x52,0xd1,0x6b,0x9a,0x46,0x9c,0x10,0x52,0x8e,0xff,0x0a,0xae],
- [0xc9,0xd1,0x84,0xdd,0xd5,0xa9,0xf5,0xe0,0xcf,0x8c,0xe2,0x9a,0x9a,0xbf,0x69,0x1c],
- [0x2d,0xb4,0x79,0xae,0x78,0xbd,0x50,0xd8,0x88,0x2a,0x8a,0x17,0x8a,0x61,0x32,0xad],
- [0x8e,0xce,0x5f,0x04,0x2d,0x5e,0x44,0x7b,0x50,0x51,0xb9,0xea,0xcb,0x8d,0x8f,0x6f],
- [0x9c,0x0b,0x53,0xb4,0xb3,0xc3,0x07,0xe8,0x7e,0xae,0xe0,0x86,0x78,0x14,0x1f,0x66],
- [0xab,0xf2,0x48,0xaf,0x69,0xa6,0xea,0xe4,0xbf,0xd3,0xeb,0x2f,0x12,0x9e,0xeb,0x94],
- [0x06,0x64,0xda,0x16,0x68,0x57,0x4b,0x88,0xb9,0x35,0xf3,0x02,0x73,0x58,0xae,0xf4],
- [0xaa,0x4b,0x9d,0xc4,0xbf,0x33,0x7d,0xe9,0x0c,0xd4,0xfd,0x3c,0x46,0x7c,0x6a,0xb7],
- [0xea,0x5c,0x7f,0x47,0x1f,0xaf,0x6b,0xde,0x2b,0x1a,0xd7,0xd4,0x68,0x6d,0x22,0x87],
- [0x29,0x39,0xb0,0x18,0x32,0x23,0xfa,0xfc,0x17,0x23,0xde,0x4f,0x52,0xc4,0x3d,0x35],
- [0x7c,0x39,0x56,0xca,0x5e,0xea,0xfc,0x3e,0x36,0x3e,0x9d,0x55,0x65,0x46,0xeb,0x68],
- [0x77,0xc6,0x07,0x71,0x46,0xf0,0x1c,0x32,0xb6,0xb6,0x9d,0x5f,0x4e,0xa9,0xff,0xcf],
- [0x37,0xa6,0x98,0x6c,0xb8,0x84,0x7e,0xdf,0x09,0x25,0xf0,0xf1,0x30,0x9b,0x54,0xde],
- [0xa7,0x05,0xf0,0xe6,0x9d,0xa9,0xa8,0xf9,0x07,0x24,0x1a,0x2e,0x92,0x3c,0x8c,0xc8],
- [0x3d,0xc4,0x7d,0x1f,0x29,0xc4,0x48,0x46,0x1e,0x9e,0x76,0xed,0x90,0x4f,0x67,0x11],
- [0x0d,0x62,0xbf,0x01,0xe6,0xfc,0x0e,0x1a,0x0d,0x3c,0x47,0x51,0xc5,0xd3,0x69,0x2b],
- [0x8c,0x03,0x46,0x8b,0xca,0x7c,0x66,0x9e,0xe4,0xfd,0x5e,0x08,0x4b,0xbe,0xe7,0xb5],
- [0x52,0x8a,0x5b,0xb9,0x3b,0xaf,0x2c,0x9c,0x44,0x73,0xcc,0xe5,0xd0,0xd2,0x2b,0xd9],
- [0xdf,0x6a,0x30,0x1e,0x95,0xc9,0x5d,0xad,0x97,0xae,0x0c,0xc8,0xc6,0x91,0x3b,0xd8],
- [0x80,0x11,0x89,0x90,0x2c,0x85,0x7f,0x39,0xe7,0x35,0x91,0x28,0x5e,0x70,0xb6,0xdb],
- [0xe6,0x17,0x34,0x6a,0xc9,0xc2,0x31,0xbb,0x36,0x50,0xae,0x34,0xcc,0xca,0x0c,0x5b],
- [0x27,0xd9,0x34,0x37,0xef,0xb7,0x21,0xaa,0x40,0x18,0x21,0xdc,0xec,0x5a,0xdf,0x89],
- [0x89,0x23,0x7d,0x9d,0xed,0x9c,0x5e,0x78,0xd8,0xb1,0xc9,0xb1,0x66,0xcc,0x73,0x42],
- [0x4a,0x6d,0x80,0x91,0xbf,0x5e,0x7d,0x65,0x11,0x89,0xfa,0x94,0xa2,0x50,0xb1,0x4c],
- [0x0e,0x33,0xf9,0x60,0x55,0xe7,0xae,0x89,0x3f,0xfc,0x0e,0x3d,0xcf,0x49,0x29,0x02],
- [0xe6,0x1c,0x43,0x2b,0x72,0x0b,0x19,0xd1,0x8e,0xc8,0xd8,0x4b,0xdc,0x63,0x15,0x1b],
- [0xf7,0xe5,0xae,0xf5,0x49,0xf7,0x82,0xcf,0x37,0x90,0x55,0xa6,0x08,0x26,0x9b,0x16],
- [0x43,0x8d,0x03,0x0f,0xd0,0xb7,0xa5,0x4f,0xa8,0x37,0xf2,0xad,0x20,0x1a,0x64,0x03],
- [0xa5,0x90,0xd3,0xee,0x4f,0xbf,0x04,0xe3,0x24,0x7e,0x0d,0x27,0xf2,0x86,0x42,0x3f],
- [0x5f,0xe2,0xc1,0xa1,0x72,0xfe,0x93,0xc4,0xb1,0x5c,0xd3,0x7c,0xae,0xf9,0xf5,0x38],
- [0x2c,0x97,0x32,0x5c,0xbd,0x06,0xb3,0x6e,0xb2,0x13,0x3d,0xd0,0x8b,0x3a,0x01,0x7c],
- [0x92,0xc8,0x14,0x22,0x7a,0x6b,0xca,0x94,0x9f,0xf0,0x65,0x9f,0x00,0x2a,0xd3,0x9e],
- [0xdc,0xe8,0x50,0x11,0x0b,0xd8,0x32,0x8c,0xfb,0xd5,0x08,0x41,0xd6,0x91,0x1d,0x87],
- [0x67,0xf1,0x49,0x84,0xc7,0xda,0x79,0x12,0x48,0xe3,0x2b,0xb5,0x92,0x25,0x83,0xda],
- [0x19,0x38,0xf2,0xcf,0x72,0xd5,0x4e,0xe9,0x7e,0x94,0x16,0x6f,0xa9,0x1d,0x2a,0x36],
- [0x74,0x48,0x1e,0x96,0x46,0xed,0x49,0xfe,0x0f,0x62,0x24,0x30,0x16,0x04,0x69,0x8e],
- [0x57,0xfc,0xa5,0xde,0x98,0xa9,0xd6,0xd8,0x00,0x64,0x38,0xd0,0x58,0x3d,0x8a,0x1d],
- [0x9f,0xec,0xde,0x1c,0xef,0xdc,0x1c,0xbe,0xd4,0x76,0x36,0x74,0xd9,0x57,0x53,0x59],
- [0xe3,0x04,0x0c,0x00,0xeb,0x28,0xf1,0x53,0x66,0xca,0x73,0xcb,0xd8,0x72,0xe7,0x40],
- [0x76,0x97,0x00,0x9a,0x6a,0x83,0x1d,0xfe,0xcc,0xa9,0x1c,0x59,0x93,0x67,0x0f,0x7a],
- [0x58,0x53,0x54,0x23,0x21,0xf5,0x67,0xa0,0x05,0xd5,0x47,0xa4,0xf0,0x47,0x59,0xbd],
- [0x51,0x50,0xd1,0x77,0x2f,0x50,0x83,0x4a,0x50,0x3e,0x06,0x9a,0x97,0x3f,0xbd,0x7c],
- ];
-
- // Test vector from reference implementation
- #[test]
- fn test_siphash_2_4_test_vector() {
- let k0 = 0x_07_06_05_04_03_02_01_00;
- let k1 = 0x_0f_0e_0d_0c_0b_0a_09_08;
-
- let mut input: Vec<u8> = Vec::new();
-
- for i in 0 .. 64 {
- let out = hash_with(SipHasher128::new_with_keys(k0, k1),
- &Bytes(&input[..]));
- let expected = (
- ((TEST_VECTOR[i][0] as u64) << 0) |
- ((TEST_VECTOR[i][1] as u64) << 8) |
- ((TEST_VECTOR[i][2] as u64) << 16) |
- ((TEST_VECTOR[i][3] as u64) << 24) |
- ((TEST_VECTOR[i][4] as u64) << 32) |
- ((TEST_VECTOR[i][5] as u64) << 40) |
- ((TEST_VECTOR[i][6] as u64) << 48) |
- ((TEST_VECTOR[i][7] as u64) << 56),
-
- ((TEST_VECTOR[i][8] as u64) << 0) |
- ((TEST_VECTOR[i][9] as u64) << 8) |
- ((TEST_VECTOR[i][10] as u64) << 16) |
- ((TEST_VECTOR[i][11] as u64) << 24) |
- ((TEST_VECTOR[i][12] as u64) << 32) |
- ((TEST_VECTOR[i][13] as u64) << 40) |
- ((TEST_VECTOR[i][14] as u64) << 48) |
- ((TEST_VECTOR[i][15] as u64) << 56),
- );
-
- assert_eq!(out, expected);
- input.push(i as u8);
- }
- }
-
- #[test] #[cfg(target_arch = "arm")]
- fn test_hash_usize() {
- let val = 0xdeadbeef_deadbeef_u64;
- assert!(hash(&(val as u64)) != hash(&(val as usize)));
- assert_eq!(hash(&(val as u32)), hash(&(val as usize)));
- }
- #[test] #[cfg(target_arch = "x86_64")]
- fn test_hash_usize() {
- let val = 0xdeadbeef_deadbeef_u64;
- assert_eq!(hash(&(val as u64)), hash(&(val as usize)));
- assert!(hash(&(val as u32)) != hash(&(val as usize)));
- }
- #[test] #[cfg(target_arch = "x86")]
- fn test_hash_usize() {
- let val = 0xdeadbeef_deadbeef_u64;
- assert!(hash(&(val as u64)) != hash(&(val as usize)));
- assert_eq!(hash(&(val as u32)), hash(&(val as usize)));
- }
-
- #[test]
- fn test_hash_idempotent() {
- let val64 = 0xdeadbeef_deadbeef_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 = 0xdeadbeef_deadbeef_u64;
-
- assert!(hash(&val) != hash(&zero_byte(val, 0)));
- assert!(hash(&val) != hash(&zero_byte(val, 1)));
- assert!(hash(&val) != hash(&zero_byte(val, 2)));
- assert!(hash(&val) != hash(&zero_byte(val, 3)));
- assert!(hash(&val) != hash(&zero_byte(val, 4)));
- assert!(hash(&val) != hash(&zero_byte(val, 5)));
- assert!(hash(&val) != hash(&zero_byte(val, 6)));
- assert!(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!(hash(&val) != hash(&zero_byte(val, 0)));
- assert!(hash(&val) != hash(&zero_byte(val, 1)));
- assert!(hash(&val) != hash(&zero_byte(val, 2)));
- assert!(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!(v != w);
- assert!(hash(&v) != hash(&w));
- }
-
- #[test]
- fn test_write_short_works() {
- let test_usize = 0xd0c0b0a0usize;
- let mut h1 = SipHasher128::new_with_keys(0, 0);
- h1.write_usize(test_usize);
- h1.write(b"bytes");
- h1.write(b"string");
- h1.write_u8(0xFFu8);
- h1.write_u8(0x01u8);
- let mut h2 = SipHasher128::new_with_keys(0, 0);
- h2.write(unsafe {
- slice::from_raw_parts(&test_usize as *const _ as *const u8,
- mem::size_of::<usize>())
- });
- h2.write(b"bytes");
- h2.write(b"string");
- h2.write(&[0xFFu8, 0x01u8]);
- assert_eq!(h1.finish128(), h2.finish128());
- }
-
-}
projects / rust.git / blobdiff