3 use core::hash::{Hash, Hasher};
4 use core::hash::{SipHasher, SipHasher13};
5 use core::{mem, slice};
7 // Hash just the bytes of the slice, without length prefix
8 struct Bytes<'a>(&'a [u8]);
10 impl<'a> Hash for Bytes<'a> {
11 #[allow(unused_must_use)]
12 fn hash<H: Hasher>(&self, state: &mut H) {
18 macro_rules! u8to64_le {
19 ($buf:expr, $i:expr) => {
21 | ($buf[1 + $i] as u64) << 8
22 | ($buf[2 + $i] as u64) << 16
23 | ($buf[3 + $i] as u64) << 24
24 | ($buf[4 + $i] as u64) << 32
25 | ($buf[5 + $i] as u64) << 40
26 | ($buf[6 + $i] as u64) << 48
27 | ($buf[7 + $i] as u64) << 56
29 ($buf:expr, $i:expr, $len:expr) => {{
33 out |= ($buf[t + $i] as u64) << t * 8;
40 fn hash_with<H: Hasher, T: Hash>(mut st: H, x: &T) -> u64 {
45 fn hash<T: Hash>(x: &T) -> u64 {
46 hash_with(SipHasher::new(), x)
50 #[allow(unused_must_use)]
51 fn test_siphash_1_3() {
52 let vecs: [[u8; 8]; 64] = [
53 [0xdc, 0xc4, 0x0f, 0x05, 0x58, 0x01, 0xac, 0xab],
54 [0x93, 0xca, 0x57, 0x7d, 0xf3, 0x9b, 0xf4, 0xc9],
55 [0x4d, 0xd4, 0xc7, 0x4d, 0x02, 0x9b, 0xcb, 0x82],
56 [0xfb, 0xf7, 0xdd, 0xe7, 0xb8, 0x0a, 0xf8, 0x8b],
57 [0x28, 0x83, 0xd3, 0x88, 0x60, 0x57, 0x75, 0xcf],
58 [0x67, 0x3b, 0x53, 0x49, 0x2f, 0xd5, 0xf9, 0xde],
59 [0xa7, 0x22, 0x9f, 0xc5, 0x50, 0x2b, 0x0d, 0xc5],
60 [0x40, 0x11, 0xb1, 0x9b, 0x98, 0x7d, 0x92, 0xd3],
61 [0x8e, 0x9a, 0x29, 0x8d, 0x11, 0x95, 0x90, 0x36],
62 [0xe4, 0x3d, 0x06, 0x6c, 0xb3, 0x8e, 0xa4, 0x25],
63 [0x7f, 0x09, 0xff, 0x92, 0xee, 0x85, 0xde, 0x79],
64 [0x52, 0xc3, 0x4d, 0xf9, 0xc1, 0x18, 0xc1, 0x70],
65 [0xa2, 0xd9, 0xb4, 0x57, 0xb1, 0x84, 0xa3, 0x78],
66 [0xa7, 0xff, 0x29, 0x12, 0x0c, 0x76, 0x6f, 0x30],
67 [0x34, 0x5d, 0xf9, 0xc0, 0x11, 0xa1, 0x5a, 0x60],
68 [0x56, 0x99, 0x51, 0x2a, 0x6d, 0xd8, 0x20, 0xd3],
69 [0x66, 0x8b, 0x90, 0x7d, 0x1a, 0xdd, 0x4f, 0xcc],
70 [0x0c, 0xd8, 0xdb, 0x63, 0x90, 0x68, 0xf2, 0x9c],
71 [0x3e, 0xe6, 0x73, 0xb4, 0x9c, 0x38, 0xfc, 0x8f],
72 [0x1c, 0x7d, 0x29, 0x8d, 0xe5, 0x9d, 0x1f, 0xf2],
73 [0x40, 0xe0, 0xcc, 0xa6, 0x46, 0x2f, 0xdc, 0xc0],
74 [0x44, 0xf8, 0x45, 0x2b, 0xfe, 0xab, 0x92, 0xb9],
75 [0x2e, 0x87, 0x20, 0xa3, 0x9b, 0x7b, 0xfe, 0x7f],
76 [0x23, 0xc1, 0xe6, 0xda, 0x7f, 0x0e, 0x5a, 0x52],
77 [0x8c, 0x9c, 0x34, 0x67, 0xb2, 0xae, 0x64, 0xf4],
78 [0x79, 0x09, 0x5b, 0x70, 0x28, 0x59, 0xcd, 0x45],
79 [0xa5, 0x13, 0x99, 0xca, 0xe3, 0x35, 0x3e, 0x3a],
80 [0x35, 0x3b, 0xde, 0x4a, 0x4e, 0xc7, 0x1d, 0xa9],
81 [0x0d, 0xd0, 0x6c, 0xef, 0x02, 0xed, 0x0b, 0xfb],
82 [0xf4, 0xe1, 0xb1, 0x4a, 0xb4, 0x3c, 0xd9, 0x88],
83 [0x63, 0xe6, 0xc5, 0x43, 0xd6, 0x11, 0x0f, 0x54],
84 [0xbc, 0xd1, 0x21, 0x8c, 0x1f, 0xdd, 0x70, 0x23],
85 [0x0d, 0xb6, 0xa7, 0x16, 0x6c, 0x7b, 0x15, 0x81],
86 [0xbf, 0xf9, 0x8f, 0x7a, 0xe5, 0xb9, 0x54, 0x4d],
87 [0x3e, 0x75, 0x2a, 0x1f, 0x78, 0x12, 0x9f, 0x75],
88 [0x91, 0x6b, 0x18, 0xbf, 0xbe, 0xa3, 0xa1, 0xce],
89 [0x06, 0x62, 0xa2, 0xad, 0xd3, 0x08, 0xf5, 0x2c],
90 [0x57, 0x30, 0xc3, 0xa3, 0x2d, 0x1c, 0x10, 0xb6],
91 [0xa1, 0x36, 0x3a, 0xae, 0x96, 0x74, 0xf4, 0xb3],
92 [0x92, 0x83, 0x10, 0x7b, 0x54, 0x57, 0x6b, 0x62],
93 [0x31, 0x15, 0xe4, 0x99, 0x32, 0x36, 0xd2, 0xc1],
94 [0x44, 0xd9, 0x1a, 0x3f, 0x92, 0xc1, 0x7c, 0x66],
95 [0x25, 0x88, 0x13, 0xc8, 0xfe, 0x4f, 0x70, 0x65],
96 [0xa6, 0x49, 0x89, 0xc2, 0xd1, 0x80, 0xf2, 0x24],
97 [0x6b, 0x87, 0xf8, 0xfa, 0xed, 0x1c, 0xca, 0xc2],
98 [0x96, 0x21, 0x04, 0x9f, 0xfc, 0x4b, 0x16, 0xc2],
99 [0x23, 0xd6, 0xb1, 0x68, 0x93, 0x9c, 0x6e, 0xa1],
100 [0xfd, 0x14, 0x51, 0x8b, 0x9c, 0x16, 0xfb, 0x49],
101 [0x46, 0x4c, 0x07, 0xdf, 0xf8, 0x43, 0x31, 0x9f],
102 [0xb3, 0x86, 0xcc, 0x12, 0x24, 0xaf, 0xfd, 0xc6],
103 [0x8f, 0x09, 0x52, 0x0a, 0xd1, 0x49, 0xaf, 0x7e],
104 [0x9a, 0x2f, 0x29, 0x9d, 0x55, 0x13, 0xf3, 0x1c],
105 [0x12, 0x1f, 0xf4, 0xa2, 0xdd, 0x30, 0x4a, 0xc4],
106 [0xd0, 0x1e, 0xa7, 0x43, 0x89, 0xe9, 0xfa, 0x36],
107 [0xe6, 0xbc, 0xf0, 0x73, 0x4c, 0xb3, 0x8f, 0x31],
108 [0x80, 0xe9, 0xa7, 0x70, 0x36, 0xbf, 0x7a, 0xa2],
109 [0x75, 0x6d, 0x3c, 0x24, 0xdb, 0xc0, 0xbc, 0xb4],
110 [0x13, 0x15, 0xb7, 0xfd, 0x52, 0xd8, 0xf8, 0x23],
111 [0x08, 0x8a, 0x7d, 0xa6, 0x4d, 0x5f, 0x03, 0x8f],
112 [0x48, 0xf1, 0xe8, 0xb7, 0xe5, 0xd0, 0x9c, 0xd8],
113 [0xee, 0x44, 0xa6, 0xf7, 0xbc, 0xe6, 0xf4, 0xf6],
114 [0xf2, 0x37, 0x18, 0x0f, 0xd8, 0x9a, 0xc5, 0xae],
115 [0xe0, 0x94, 0x66, 0x4b, 0x15, 0xf6, 0xb2, 0xc3],
116 [0xa8, 0xb3, 0xbb, 0xb7, 0x62, 0x90, 0x19, 0x9d],
119 let k0 = 0x_07_06_05_04_03_02_01_00;
120 let k1 = 0x_0f_0e_0d_0c_0b_0a_09_08;
121 let mut buf = Vec::new();
123 let mut state_inc = SipHasher13::new_with_keys(k0, k1);
126 let vec = u8to64_le!(vecs[t], 0);
127 let out = hash_with(SipHasher13::new_with_keys(k0, k1), &Bytes(&buf));
128 assert_eq!(vec, out);
130 let full = hash_with(SipHasher13::new_with_keys(k0, k1), &Bytes(&buf));
131 let i = state_inc.finish();
134 assert_eq!(full, vec);
137 Hasher::write(&mut state_inc, &[t as u8]);
144 #[allow(unused_must_use)]
145 fn test_siphash_2_4() {
146 let vecs: [[u8; 8]; 64] = [
147 [0x31, 0x0e, 0x0e, 0xdd, 0x47, 0xdb, 0x6f, 0x72],
148 [0xfd, 0x67, 0xdc, 0x93, 0xc5, 0x39, 0xf8, 0x74],
149 [0x5a, 0x4f, 0xa9, 0xd9, 0x09, 0x80, 0x6c, 0x0d],
150 [0x2d, 0x7e, 0xfb, 0xd7, 0x96, 0x66, 0x67, 0x85],
151 [0xb7, 0x87, 0x71, 0x27, 0xe0, 0x94, 0x27, 0xcf],
152 [0x8d, 0xa6, 0x99, 0xcd, 0x64, 0x55, 0x76, 0x18],
153 [0xce, 0xe3, 0xfe, 0x58, 0x6e, 0x46, 0xc9, 0xcb],
154 [0x37, 0xd1, 0x01, 0x8b, 0xf5, 0x00, 0x02, 0xab],
155 [0x62, 0x24, 0x93, 0x9a, 0x79, 0xf5, 0xf5, 0x93],
156 [0xb0, 0xe4, 0xa9, 0x0b, 0xdf, 0x82, 0x00, 0x9e],
157 [0xf3, 0xb9, 0xdd, 0x94, 0xc5, 0xbb, 0x5d, 0x7a],
158 [0xa7, 0xad, 0x6b, 0x22, 0x46, 0x2f, 0xb3, 0xf4],
159 [0xfb, 0xe5, 0x0e, 0x86, 0xbc, 0x8f, 0x1e, 0x75],
160 [0x90, 0x3d, 0x84, 0xc0, 0x27, 0x56, 0xea, 0x14],
161 [0xee, 0xf2, 0x7a, 0x8e, 0x90, 0xca, 0x23, 0xf7],
162 [0xe5, 0x45, 0xbe, 0x49, 0x61, 0xca, 0x29, 0xa1],
163 [0xdb, 0x9b, 0xc2, 0x57, 0x7f, 0xcc, 0x2a, 0x3f],
164 [0x94, 0x47, 0xbe, 0x2c, 0xf5, 0xe9, 0x9a, 0x69],
165 [0x9c, 0xd3, 0x8d, 0x96, 0xf0, 0xb3, 0xc1, 0x4b],
166 [0xbd, 0x61, 0x79, 0xa7, 0x1d, 0xc9, 0x6d, 0xbb],
167 [0x98, 0xee, 0xa2, 0x1a, 0xf2, 0x5c, 0xd6, 0xbe],
168 [0xc7, 0x67, 0x3b, 0x2e, 0xb0, 0xcb, 0xf2, 0xd0],
169 [0x88, 0x3e, 0xa3, 0xe3, 0x95, 0x67, 0x53, 0x93],
170 [0xc8, 0xce, 0x5c, 0xcd, 0x8c, 0x03, 0x0c, 0xa8],
171 [0x94, 0xaf, 0x49, 0xf6, 0xc6, 0x50, 0xad, 0xb8],
172 [0xea, 0xb8, 0x85, 0x8a, 0xde, 0x92, 0xe1, 0xbc],
173 [0xf3, 0x15, 0xbb, 0x5b, 0xb8, 0x35, 0xd8, 0x17],
174 [0xad, 0xcf, 0x6b, 0x07, 0x63, 0x61, 0x2e, 0x2f],
175 [0xa5, 0xc9, 0x1d, 0xa7, 0xac, 0xaa, 0x4d, 0xde],
176 [0x71, 0x65, 0x95, 0x87, 0x66, 0x50, 0xa2, 0xa6],
177 [0x28, 0xef, 0x49, 0x5c, 0x53, 0xa3, 0x87, 0xad],
178 [0x42, 0xc3, 0x41, 0xd8, 0xfa, 0x92, 0xd8, 0x32],
179 [0xce, 0x7c, 0xf2, 0x72, 0x2f, 0x51, 0x27, 0x71],
180 [0xe3, 0x78, 0x59, 0xf9, 0x46, 0x23, 0xf3, 0xa7],
181 [0x38, 0x12, 0x05, 0xbb, 0x1a, 0xb0, 0xe0, 0x12],
182 [0xae, 0x97, 0xa1, 0x0f, 0xd4, 0x34, 0xe0, 0x15],
183 [0xb4, 0xa3, 0x15, 0x08, 0xbe, 0xff, 0x4d, 0x31],
184 [0x81, 0x39, 0x62, 0x29, 0xf0, 0x90, 0x79, 0x02],
185 [0x4d, 0x0c, 0xf4, 0x9e, 0xe5, 0xd4, 0xdc, 0xca],
186 [0x5c, 0x73, 0x33, 0x6a, 0x76, 0xd8, 0xbf, 0x9a],
187 [0xd0, 0xa7, 0x04, 0x53, 0x6b, 0xa9, 0x3e, 0x0e],
188 [0x92, 0x59, 0x58, 0xfc, 0xd6, 0x42, 0x0c, 0xad],
189 [0xa9, 0x15, 0xc2, 0x9b, 0xc8, 0x06, 0x73, 0x18],
190 [0x95, 0x2b, 0x79, 0xf3, 0xbc, 0x0a, 0xa6, 0xd4],
191 [0xf2, 0x1d, 0xf2, 0xe4, 0x1d, 0x45, 0x35, 0xf9],
192 [0x87, 0x57, 0x75, 0x19, 0x04, 0x8f, 0x53, 0xa9],
193 [0x10, 0xa5, 0x6c, 0xf5, 0xdf, 0xcd, 0x9a, 0xdb],
194 [0xeb, 0x75, 0x09, 0x5c, 0xcd, 0x98, 0x6c, 0xd0],
195 [0x51, 0xa9, 0xcb, 0x9e, 0xcb, 0xa3, 0x12, 0xe6],
196 [0x96, 0xaf, 0xad, 0xfc, 0x2c, 0xe6, 0x66, 0xc7],
197 [0x72, 0xfe, 0x52, 0x97, 0x5a, 0x43, 0x64, 0xee],
198 [0x5a, 0x16, 0x45, 0xb2, 0x76, 0xd5, 0x92, 0xa1],
199 [0xb2, 0x74, 0xcb, 0x8e, 0xbf, 0x87, 0x87, 0x0a],
200 [0x6f, 0x9b, 0xb4, 0x20, 0x3d, 0xe7, 0xb3, 0x81],
201 [0xea, 0xec, 0xb2, 0xa3, 0x0b, 0x22, 0xa8, 0x7f],
202 [0x99, 0x24, 0xa4, 0x3c, 0xc1, 0x31, 0x57, 0x24],
203 [0xbd, 0x83, 0x8d, 0x3a, 0xaf, 0xbf, 0x8d, 0xb7],
204 [0x0b, 0x1a, 0x2a, 0x32, 0x65, 0xd5, 0x1a, 0xea],
205 [0x13, 0x50, 0x79, 0xa3, 0x23, 0x1c, 0xe6, 0x60],
206 [0x93, 0x2b, 0x28, 0x46, 0xe4, 0xd7, 0x06, 0x66],
207 [0xe1, 0x91, 0x5f, 0x5c, 0xb1, 0xec, 0xa4, 0x6c],
208 [0xf3, 0x25, 0x96, 0x5c, 0xa1, 0x6d, 0x62, 0x9f],
209 [0x57, 0x5f, 0xf2, 0x8e, 0x60, 0x38, 0x1b, 0xe5],
210 [0x72, 0x45, 0x06, 0xeb, 0x4c, 0x32, 0x8a, 0x95],
213 let k0 = 0x_07_06_05_04_03_02_01_00;
214 let k1 = 0x_0f_0e_0d_0c_0b_0a_09_08;
215 let mut buf = Vec::new();
217 let mut state_inc = SipHasher::new_with_keys(k0, k1);
220 let vec = u8to64_le!(vecs[t], 0);
221 let out = hash_with(SipHasher::new_with_keys(k0, k1), &Bytes(&buf));
222 assert_eq!(vec, out);
224 let full = hash_with(SipHasher::new_with_keys(k0, k1), &Bytes(&buf));
225 let i = state_inc.finish();
228 assert_eq!(full, vec);
231 Hasher::write(&mut state_inc, &[t as u8]);
238 #[cfg(target_pointer_width = "32")]
239 fn test_hash_usize() {
240 let val = 0xdeadbeef_deadbeef_u64;
241 assert_ne!(hash(&(val as u64)), hash(&(val as usize)));
242 assert_eq!(hash(&(val as u32)), hash(&(val as usize)));
246 #[cfg(target_pointer_width = "64")]
247 fn test_hash_usize() {
248 let val = 0xdeadbeef_deadbeef_u64;
249 assert_eq!(hash(&(val as u64)), hash(&(val as usize)));
250 assert_ne!(hash(&(val as u32)), hash(&(val as usize)));
254 fn test_hash_idempotent() {
255 let val64 = 0xdeadbeef_deadbeef_u64;
256 assert_eq!(hash(&val64), hash(&val64));
257 let val32 = 0xdeadbeef_u32;
258 assert_eq!(hash(&val32), hash(&val32));
262 fn test_hash_no_bytes_dropped_64() {
263 let val = 0xdeadbeef_deadbeef_u64;
265 assert_ne!(hash(&val), hash(&zero_byte(val, 0)));
266 assert_ne!(hash(&val), hash(&zero_byte(val, 1)));
267 assert_ne!(hash(&val), hash(&zero_byte(val, 2)));
268 assert_ne!(hash(&val), hash(&zero_byte(val, 3)));
269 assert_ne!(hash(&val), hash(&zero_byte(val, 4)));
270 assert_ne!(hash(&val), hash(&zero_byte(val, 5)));
271 assert_ne!(hash(&val), hash(&zero_byte(val, 6)));
272 assert_ne!(hash(&val), hash(&zero_byte(val, 7)));
274 fn zero_byte(val: u64, byte: usize) -> u64 {
276 val & !(0xff << (byte * 8))
281 fn test_hash_no_bytes_dropped_32() {
282 let val = 0xdeadbeef_u32;
284 assert_ne!(hash(&val), hash(&zero_byte(val, 0)));
285 assert_ne!(hash(&val), hash(&zero_byte(val, 1)));
286 assert_ne!(hash(&val), hash(&zero_byte(val, 2)));
287 assert_ne!(hash(&val), hash(&zero_byte(val, 3)));
289 fn zero_byte(val: u32, byte: usize) -> u32 {
291 val & !(0xff << (byte * 8))
296 fn test_hash_no_concat_alias() {
297 let s = ("aa", "bb");
298 let t = ("aabb", "");
299 let u = ("a", "abb");
303 assert_ne!(hash(&s), hash(&t));
304 assert_ne!(hash(&s), hash(&u));
306 let u = [1, 0, 0, 0];
307 let v = (&u[..1], &u[1..3], &u[3..]);
308 let w = (&u[..], &u[4..4], &u[4..4]);
311 assert_ne!(hash(&v), hash(&w));
315 fn test_write_short_works() {
316 let test_usize = 0xd0c0b0a0usize;
317 let mut h1 = SipHasher::new();
318 h1.write_usize(test_usize);
323 let mut h2 = SipHasher::new();
325 slice::from_raw_parts(&test_usize as *const _ as *const u8, mem::size_of::<usize>())
329 h2.write(&[0xFFu8, 0x01u8]);
330 assert_eq!(h1.finish(), h2.finish());