// 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 =
0 xdead_beef_dead_beef_u64;
assert_eq!(hash(&val64), hash(&val64));
let val32 =
0 xdeadbeef_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 =
0 x_07_06_05_04_03_02_01_00;
let k1 =
0 x_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 =
0 x_07_06_05_04_03_02_01_00;
let k1 =
0 x_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 =
0 xdead_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);
}
Messung V0.5 in Prozent C=91 H=97 G=93
¤ Dauer der Verarbeitung: 0.15 Sekunden
(vorverarbeitet am 2026-08-26)
¤
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