compiler/rustc_data_structures/src/sip128/tests.rs

   1 use super::*;
   2
   3 use std::hash::{Hash, Hasher};
   4
   5 // Hash just the bytes of the slice, without length prefix
   6 struct Bytes<'a>(&'a [u8]);
   7
   8 impl<'a> Hash for Bytes<'a> {
   9     #[allow(unused_must_use)]
  10     fn hash<H: Hasher>(&self, state: &mut H) {
  11         for byte in self.0 {
  12             state.write_u8(*byte);
  13         }
  14     }
  15 }
  16
  17 fn hash_with<T: Hash>(mut st: SipHasher128, x: &T) -> (u64, u64) {
  18     x.hash(&mut st);
  19     st.finish128()
  20 }
  21
  22 fn hash<T: Hash>(x: &T) -> (u64, u64) {
  23     hash_with(SipHasher128::new_with_keys(0, 0), x)
  24 }
  25
  26 const TEST_VECTOR: [[u8; 16]; 64] = [
  27     [
  28         0xa3, 0x81, 0x7f, 0x04, 0xba, 0x25, 0xa8, 0xe6, 0x6d, 0xf6, 0x72, 0x14, 0xc7, 0x55, 0x02,
  29         0x93,
  30     ],
  31     [
  32         0xda, 0x87, 0xc1, 0xd8, 0x6b, 0x99, 0xaf, 0x44, 0x34, 0x76, 0x59, 0x11, 0x9b, 0x22, 0xfc,
  33         0x45,
  34     ],
  35     [
  36         0x81, 0x77, 0x22, 0x8d, 0xa4, 0xa4, 0x5d, 0xc7, 0xfc, 0xa3, 0x8b, 0xde, 0xf6, 0x0a, 0xff,
  37         0xe4,
  38     ],
  39     [
  40         0x9c, 0x70, 0xb6, 0x0c, 0x52, 0x67, 0xa9, 0x4e, 0x5f, 0x33, 0xb6, 0xb0, 0x29, 0x85, 0xed,
  41         0x51,
  42     ],
  43     [
  44         0xf8, 0x81, 0x64, 0xc1, 0x2d, 0x9c, 0x8f, 0xaf, 0x7d, 0x0f, 0x6e, 0x7c, 0x7b, 0xcd, 0x55,
  45         0x79,
  46     ],
  47     [
  48         0x13, 0x68, 0x87, 0x59, 0x80, 0x77, 0x6f, 0x88, 0x54, 0x52, 0x7a, 0x07, 0x69, 0x0e, 0x96,
  49         0x27,
  50     ],
  51     [
  52         0x14, 0xee, 0xca, 0x33, 0x8b, 0x20, 0x86, 0x13, 0x48, 0x5e, 0xa0, 0x30, 0x8f, 0xd7, 0xa1,
  53         0x5e,
  54     ],
  55     [
  56         0xa1, 0xf1, 0xeb, 0xbe, 0xd8, 0xdb, 0xc1, 0x53, 0xc0, 0xb8, 0x4a, 0xa6, 0x1f, 0xf0, 0x82,
  57         0x39,
  58     ],
  59     [
  60         0x3b, 0x62, 0xa9, 0xba, 0x62, 0x58, 0xf5, 0x61, 0x0f, 0x83, 0xe2, 0x64, 0xf3, 0x14, 0x97,
  61         0xb4,
  62     ],
  63     [
  64         0x26, 0x44, 0x99, 0x06, 0x0a, 0xd9, 0xba, 0xab, 0xc4, 0x7f, 0x8b, 0x02, 0xbb, 0x6d, 0x71,
  65         0xed,
  66     ],
  67     [
  68         0x00, 0x11, 0x0d, 0xc3, 0x78, 0x14, 0x69, 0x56, 0xc9, 0x54, 0x47, 0xd3, 0xf3, 0xd0, 0xfb,
  69         0xba,
  70     ],
  71     [
  72         0x01, 0x51, 0xc5, 0x68, 0x38, 0x6b, 0x66, 0x77, 0xa2, 0xb4, 0xdc, 0x6f, 0x81, 0xe5, 0xdc,
  73         0x18,
  74     ],
  75     [
  76         0xd6, 0x26, 0xb2, 0x66, 0x90, 0x5e, 0xf3, 0x58, 0x82, 0x63, 0x4d, 0xf6, 0x85, 0x32, 0xc1,
  77         0x25,
  78     ],
  79     [
  80         0x98, 0x69, 0xe2, 0x47, 0xe9, 0xc0, 0x8b, 0x10, 0xd0, 0x29, 0x93, 0x4f, 0xc4, 0xb9, 0x52,
  81         0xf7,
  82     ],
  83     [
  84         0x31, 0xfc, 0xef, 0xac, 0x66, 0xd7, 0xde, 0x9c, 0x7e, 0xc7, 0x48, 0x5f, 0xe4, 0x49, 0x49,
  85         0x02,
  86     ],
  87     [
  88         0x54, 0x93, 0xe9, 0x99, 0x33, 0xb0, 0xa8, 0x11, 0x7e, 0x08, 0xec, 0x0f, 0x97, 0xcf, 0xc3,
  89         0xd9,
  90     ],
  91     [
  92         0x6e, 0xe2, 0xa4, 0xca, 0x67, 0xb0, 0x54, 0xbb, 0xfd, 0x33, 0x15, 0xbf, 0x85, 0x23, 0x05,
  93         0x77,
  94     ],
  95     [
  96         0x47, 0x3d, 0x06, 0xe8, 0x73, 0x8d, 0xb8, 0x98, 0x54, 0xc0, 0x66, 0xc4, 0x7a, 0xe4, 0x77,
  97         0x40,
  98     ],
  99     [
 100         0xa4, 0x26, 0xe5, 0xe4, 0x23, 0xbf, 0x48, 0x85, 0x29, 0x4d, 0xa4, 0x81, 0xfe, 0xae, 0xf7,
 101         0x23,
 102     ],
 103     [
 104         0x78, 0x01, 0x77, 0x31, 0xcf, 0x65, 0xfa, 0xb0, 0x74, 0xd5, 0x20, 0x89, 0x52, 0x51, 0x2e,
 105         0xb1,
 106     ],
 107     [
 108         0x9e, 0x25, 0xfc, 0x83, 0x3f, 0x22, 0x90, 0x73, 0x3e, 0x93, 0x44, 0xa5, 0xe8, 0x38, 0x39,
 109         0xeb,
 110     ],
 111     [
 112         0x56, 0x8e, 0x49, 0x5a, 0xbe, 0x52, 0x5a, 0x21, 0x8a, 0x22, 0x14, 0xcd, 0x3e, 0x07, 0x1d,
 113         0x12,
 114     ],
 115     [
 116         0x4a, 0x29, 0xb5, 0x45, 0x52, 0xd1, 0x6b, 0x9a, 0x46, 0x9c, 0x10, 0x52, 0x8e, 0xff, 0x0a,
 117         0xae,
 118     ],
 119     [
 120         0xc9, 0xd1, 0x84, 0xdd, 0xd5, 0xa9, 0xf5, 0xe0, 0xcf, 0x8c, 0xe2, 0x9a, 0x9a, 0xbf, 0x69,
 121         0x1c,
 122     ],
 123     [
 124         0x2d, 0xb4, 0x79, 0xae, 0x78, 0xbd, 0x50, 0xd8, 0x88, 0x2a, 0x8a, 0x17, 0x8a, 0x61, 0x32,
 125         0xad,
 126     ],
 127     [
 128         0x8e, 0xce, 0x5f, 0x04, 0x2d, 0x5e, 0x44, 0x7b, 0x50, 0x51, 0xb9, 0xea, 0xcb, 0x8d, 0x8f,
 129         0x6f,
 130     ],
 131     [
 132         0x9c, 0x0b, 0x53, 0xb4, 0xb3, 0xc3, 0x07, 0xe8, 0x7e, 0xae, 0xe0, 0x86, 0x78, 0x14, 0x1f,
 133         0x66,
 134     ],
 135     [
 136         0xab, 0xf2, 0x48, 0xaf, 0x69, 0xa6, 0xea, 0xe4, 0xbf, 0xd3, 0xeb, 0x2f, 0x12, 0x9e, 0xeb,
 137         0x94,
 138     ],
 139     [
 140         0x06, 0x64, 0xda, 0x16, 0x68, 0x57, 0x4b, 0x88, 0xb9, 0x35, 0xf3, 0x02, 0x73, 0x58, 0xae,
 141         0xf4,
 142     ],
 143     [
 144         0xaa, 0x4b, 0x9d, 0xc4, 0xbf, 0x33, 0x7d, 0xe9, 0x0c, 0xd4, 0xfd, 0x3c, 0x46, 0x7c, 0x6a,
 145         0xb7,
 146     ],
 147     [
 148         0xea, 0x5c, 0x7f, 0x47, 0x1f, 0xaf, 0x6b, 0xde, 0x2b, 0x1a, 0xd7, 0xd4, 0x68, 0x6d, 0x22,
 149         0x87,
 150     ],
 151     [
 152         0x29, 0x39, 0xb0, 0x18, 0x32, 0x23, 0xfa, 0xfc, 0x17, 0x23, 0xde, 0x4f, 0x52, 0xc4, 0x3d,
 153         0x35,
 154     ],
 155     [
 156         0x7c, 0x39, 0x56, 0xca, 0x5e, 0xea, 0xfc, 0x3e, 0x36, 0x3e, 0x9d, 0x55, 0x65, 0x46, 0xeb,
 157         0x68,
 158     ],
 159     [
 160         0x77, 0xc6, 0x07, 0x71, 0x46, 0xf0, 0x1c, 0x32, 0xb6, 0xb6, 0x9d, 0x5f, 0x4e, 0xa9, 0xff,
 161         0xcf,
 162     ],
 163     [
 164         0x37, 0xa6, 0x98, 0x6c, 0xb8, 0x84, 0x7e, 0xdf, 0x09, 0x25, 0xf0, 0xf1, 0x30, 0x9b, 0x54,
 165         0xde,
 166     ],
 167     [
 168         0xa7, 0x05, 0xf0, 0xe6, 0x9d, 0xa9, 0xa8, 0xf9, 0x07, 0x24, 0x1a, 0x2e, 0x92, 0x3c, 0x8c,
 169         0xc8,
 170     ],
 171     [
 172         0x3d, 0xc4, 0x7d, 0x1f, 0x29, 0xc4, 0x48, 0x46, 0x1e, 0x9e, 0x76, 0xed, 0x90, 0x4f, 0x67,
 173         0x11,
 174     ],
 175     [
 176         0x0d, 0x62, 0xbf, 0x01, 0xe6, 0xfc, 0x0e, 0x1a, 0x0d, 0x3c, 0x47, 0x51, 0xc5, 0xd3, 0x69,
 177         0x2b,
 178     ],
 179     [
 180         0x8c, 0x03, 0x46, 0x8b, 0xca, 0x7c, 0x66, 0x9e, 0xe4, 0xfd, 0x5e, 0x08, 0x4b, 0xbe, 0xe7,
 181         0xb5,
 182     ],
 183     [
 184         0x52, 0x8a, 0x5b, 0xb9, 0x3b, 0xaf, 0x2c, 0x9c, 0x44, 0x73, 0xcc, 0xe5, 0xd0, 0xd2, 0x2b,
 185         0xd9,
 186     ],
 187     [
 188         0xdf, 0x6a, 0x30, 0x1e, 0x95, 0xc9, 0x5d, 0xad, 0x97, 0xae, 0x0c, 0xc8, 0xc6, 0x91, 0x3b,
 189         0xd8,
 190     ],
 191     [
 192         0x80, 0x11, 0x89, 0x90, 0x2c, 0x85, 0x7f, 0x39, 0xe7, 0x35, 0x91, 0x28, 0x5e, 0x70, 0xb6,
 193         0xdb,
 194     ],
 195     [
 196         0xe6, 0x17, 0x34, 0x6a, 0xc9, 0xc2, 0x31, 0xbb, 0x36, 0x50, 0xae, 0x34, 0xcc, 0xca, 0x0c,
 197         0x5b,
 198     ],
 199     [
 200         0x27, 0xd9, 0x34, 0x37, 0xef, 0xb7, 0x21, 0xaa, 0x40, 0x18, 0x21, 0xdc, 0xec, 0x5a, 0xdf,
 201         0x89,
 202     ],
 203     [
 204         0x89, 0x23, 0x7d, 0x9d, 0xed, 0x9c, 0x5e, 0x78, 0xd8, 0xb1, 0xc9, 0xb1, 0x66, 0xcc, 0x73,
 205         0x42,
 206     ],
 207     [
 208         0x4a, 0x6d, 0x80, 0x91, 0xbf, 0x5e, 0x7d, 0x65, 0x11, 0x89, 0xfa, 0x94, 0xa2, 0x50, 0xb1,
 209         0x4c,
 210     ],
 211     [
 212         0x0e, 0x33, 0xf9, 0x60, 0x55, 0xe7, 0xae, 0x89, 0x3f, 0xfc, 0x0e, 0x3d, 0xcf, 0x49, 0x29,
 213         0x02,
 214     ],
 215     [
 216         0xe6, 0x1c, 0x43, 0x2b, 0x72, 0x0b, 0x19, 0xd1, 0x8e, 0xc8, 0xd8, 0x4b, 0xdc, 0x63, 0x15,
 217         0x1b,
 218     ],
 219     [
 220         0xf7, 0xe5, 0xae, 0xf5, 0x49, 0xf7, 0x82, 0xcf, 0x37, 0x90, 0x55, 0xa6, 0x08, 0x26, 0x9b,
 221         0x16,
 222     ],
 223     [
 224         0x43, 0x8d, 0x03, 0x0f, 0xd0, 0xb7, 0xa5, 0x4f, 0xa8, 0x37, 0xf2, 0xad, 0x20, 0x1a, 0x64,
 225         0x03,
 226     ],
 227     [
 228         0xa5, 0x90, 0xd3, 0xee, 0x4f, 0xbf, 0x04, 0xe3, 0x24, 0x7e, 0x0d, 0x27, 0xf2, 0x86, 0x42,
 229         0x3f,
 230     ],
 231     [
 232         0x5f, 0xe2, 0xc1, 0xa1, 0x72, 0xfe, 0x93, 0xc4, 0xb1, 0x5c, 0xd3, 0x7c, 0xae, 0xf9, 0xf5,
 233         0x38,
 234     ],
 235     [
 236         0x2c, 0x97, 0x32, 0x5c, 0xbd, 0x06, 0xb3, 0x6e, 0xb2, 0x13, 0x3d, 0xd0, 0x8b, 0x3a, 0x01,
 237         0x7c,
 238     ],
 239     [
 240         0x92, 0xc8, 0x14, 0x22, 0x7a, 0x6b, 0xca, 0x94, 0x9f, 0xf0, 0x65, 0x9f, 0x00, 0x2a, 0xd3,
 241         0x9e,
 242     ],
 243     [
 244         0xdc, 0xe8, 0x50, 0x11, 0x0b, 0xd8, 0x32, 0x8c, 0xfb, 0xd5, 0x08, 0x41, 0xd6, 0x91, 0x1d,
 245         0x87,
 246     ],
 247     [
 248         0x67, 0xf1, 0x49, 0x84, 0xc7, 0xda, 0x79, 0x12, 0x48, 0xe3, 0x2b, 0xb5, 0x92, 0x25, 0x83,
 249         0xda,
 250     ],
 251     [
 252         0x19, 0x38, 0xf2, 0xcf, 0x72, 0xd5, 0x4e, 0xe9, 0x7e, 0x94, 0x16, 0x6f, 0xa9, 0x1d, 0x2a,
 253         0x36,
 254     ],
 255     [
 256         0x74, 0x48, 0x1e, 0x96, 0x46, 0xed, 0x49, 0xfe, 0x0f, 0x62, 0x24, 0x30, 0x16, 0x04, 0x69,
 257         0x8e,
 258     ],
 259     [
 260         0x57, 0xfc, 0xa5, 0xde, 0x98, 0xa9, 0xd6, 0xd8, 0x00, 0x64, 0x38, 0xd0, 0x58, 0x3d, 0x8a,
 261         0x1d,
 262     ],
 263     [
 264         0x9f, 0xec, 0xde, 0x1c, 0xef, 0xdc, 0x1c, 0xbe, 0xd4, 0x76, 0x36, 0x74, 0xd9, 0x57, 0x53,
 265         0x59,
 266     ],
 267     [
 268         0xe3, 0x04, 0x0c, 0x00, 0xeb, 0x28, 0xf1, 0x53, 0x66, 0xca, 0x73, 0xcb, 0xd8, 0x72, 0xe7,
 269         0x40,
 270     ],
 271     [
 272         0x76, 0x97, 0x00, 0x9a, 0x6a, 0x83, 0x1d, 0xfe, 0xcc, 0xa9, 0x1c, 0x59, 0x93, 0x67, 0x0f,
 273         0x7a,
 274     ],
 275     [
 276         0x58, 0x53, 0x54, 0x23, 0x21, 0xf5, 0x67, 0xa0, 0x05, 0xd5, 0x47, 0xa4, 0xf0, 0x47, 0x59,
 277         0xbd,
 278     ],
 279     [
 280         0x51, 0x50, 0xd1, 0x77, 0x2f, 0x50, 0x83, 0x4a, 0x50, 0x3e, 0x06, 0x9a, 0x97, 0x3f, 0xbd,
 281         0x7c,
 282     ],
 283 ];
 284
 285 // Test vector from reference implementation
 286 #[test]
 287 fn test_siphash_2_4_test_vector() {
 288     let k0 = 0x_07_06_05_04_03_02_01_00;
 289     let k1 = 0x_0f_0e_0d_0c_0b_0a_09_08;
 290
 291     let mut input: Vec<u8> = Vec::new();
 292
 293     for i in 0..64 {
 294         let out = hash_with(SipHasher128::new_with_keys(k0, k1), &Bytes(&input[..]));
 295         let expected = (
 296             ((TEST_VECTOR[i][0] as u64) << 0)
 297                 | ((TEST_VECTOR[i][1] as u64) << 8)
 298                 | ((TEST_VECTOR[i][2] as u64) << 16)
 299                 | ((TEST_VECTOR[i][3] as u64) << 24)
 300                 | ((TEST_VECTOR[i][4] as u64) << 32)
 301                 | ((TEST_VECTOR[i][5] as u64) << 40)
 302                 | ((TEST_VECTOR[i][6] as u64) << 48)
 303                 | ((TEST_VECTOR[i][7] as u64) << 56),
 304             ((TEST_VECTOR[i][8] as u64) << 0)
 305                 | ((TEST_VECTOR[i][9] as u64) << 8)
 306                 | ((TEST_VECTOR[i][10] as u64) << 16)
 307                 | ((TEST_VECTOR[i][11] as u64) << 24)
 308                 | ((TEST_VECTOR[i][12] as u64) << 32)
 309                 | ((TEST_VECTOR[i][13] as u64) << 40)
 310                 | ((TEST_VECTOR[i][14] as u64) << 48)
 311                 | ((TEST_VECTOR[i][15] as u64) << 56),
 312         );
 313
 314         assert_eq!(out, expected);
 315         input.push(i as u8);
 316     }
 317 }
 318
 319 #[test]
 320 #[cfg(target_arch = "arm")]
 321 fn test_hash_usize() {
 322     let val = 0xdeadbeef_deadbeef_u64;
 323     assert!(hash(&(val as u64)) != hash(&(val as usize)));
 324     assert_eq!(hash(&(val as u32)), hash(&(val as usize)));
 325 }
 326 #[test]
 327 #[cfg(target_arch = "x86_64")]
 328 fn test_hash_usize() {
 329     let val = 0xdeadbeef_deadbeef_u64;
 330     assert_eq!(hash(&(val as u64)), hash(&(val as usize)));
 331     assert!(hash(&(val as u32)) != hash(&(val as usize)));
 332 }
 333 #[test]
 334 #[cfg(target_arch = "x86")]
 335 fn test_hash_usize() {
 336     let val = 0xdeadbeef_deadbeef_u64;
 337     assert!(hash(&(val as u64)) != hash(&(val as usize)));
 338     assert_eq!(hash(&(val as u32)), hash(&(val as usize)));
 339 }
 340
 341 #[test]
 342 fn test_hash_idempotent() {
 343     let val64 = 0xdeadbeef_deadbeef_u64;
 344     assert_eq!(hash(&val64), hash(&val64));
 345     let val32 = 0xdeadbeef_u32;
 346     assert_eq!(hash(&val32), hash(&val32));
 347 }
 348
 349 #[test]
 350 fn test_hash_no_bytes_dropped_64() {
 351     let val = 0xdeadbeef_deadbeef_u64;
 352
 353     assert!(hash(&val) != hash(&zero_byte(val, 0)));
 354     assert!(hash(&val) != hash(&zero_byte(val, 1)));
 355     assert!(hash(&val) != hash(&zero_byte(val, 2)));
 356     assert!(hash(&val) != hash(&zero_byte(val, 3)));
 357     assert!(hash(&val) != hash(&zero_byte(val, 4)));
 358     assert!(hash(&val) != hash(&zero_byte(val, 5)));
 359     assert!(hash(&val) != hash(&zero_byte(val, 6)));
 360     assert!(hash(&val) != hash(&zero_byte(val, 7)));
 361
 362     fn zero_byte(val: u64, byte: usize) -> u64 {
 363         assert!(byte < 8);
 364         val & !(0xff << (byte * 8))
 365     }
 366 }
 367
 368 #[test]
 369 fn test_hash_no_bytes_dropped_32() {
 370     let val = 0xdeadbeef_u32;
 371
 372     assert!(hash(&val) != hash(&zero_byte(val, 0)));
 373     assert!(hash(&val) != hash(&zero_byte(val, 1)));
 374     assert!(hash(&val) != hash(&zero_byte(val, 2)));
 375     assert!(hash(&val) != hash(&zero_byte(val, 3)));
 376
 377     fn zero_byte(val: u32, byte: usize) -> u32 {
 378         assert!(byte < 4);
 379         val & !(0xff << (byte * 8))
 380     }
 381 }
 382
 383 #[test]
 384 fn test_hash_no_concat_alias() {
 385     let s = ("aa", "bb");
 386     let t = ("aabb", "");
 387     let u = ("a", "abb");
 388
 389     assert!(s != t && t != u);
 390     assert!(hash(&s) != hash(&t) && hash(&s) != hash(&u));
 391
 392     let u = [1, 0, 0, 0];
 393     let v = (&u[..1], &u[1..3], &u[3..]);
 394     let w = (&u[..], &u[4..4], &u[4..4]);
 395
 396     assert!(v != w);
 397     assert!(hash(&v) != hash(&w));
 398 }
 399
 400 #[test]
 401 fn test_short_write_works() {
 402     let test_u8 = 0xFF_u8;
 403     let test_u16 = 0x1122_u16;
 404     let test_u32 = 0x22334455_u32;
 405     let test_u64 = 0x33445566_778899AA_u64;
 406     let test_u128 = 0x11223344_55667788_99AABBCC_DDEEFF77_u128;
 407     let test_usize = 0xD0C0B0A0_usize;
 408
 409     let test_i8 = -1_i8;
 410     let test_i16 = -2_i16;
 411     let test_i32 = -3_i32;
 412     let test_i64 = -4_i64;
 413     let test_i128 = -5_i128;
 414     let test_isize = -6_isize;
 415
 416     let mut h1 = SipHasher128::new_with_keys(0, 0);
 417     h1.write(b"bytes");
 418     h1.write(b"string");
 419     h1.write_u8(test_u8);
 420     h1.write_u16(test_u16);
 421     h1.write_u32(test_u32);
 422     h1.write_u64(test_u64);
 423     h1.write_u128(test_u128);
 424     h1.write_usize(test_usize);
 425     h1.write_i8(test_i8);
 426     h1.write_i16(test_i16);
 427     h1.write_i32(test_i32);
 428     h1.write_i64(test_i64);
 429     h1.write_i128(test_i128);
 430     h1.write_isize(test_isize);
 431
 432     let mut h2 = SipHasher128::new_with_keys(0, 0);
 433     h2.write(b"bytes");
 434     h2.write(b"string");
 435     h2.write(&test_u8.to_ne_bytes());
 436     h2.write(&test_u16.to_ne_bytes());
 437     h2.write(&test_u32.to_ne_bytes());
 438     h2.write(&test_u64.to_ne_bytes());
 439     h2.write(&test_u128.to_ne_bytes());
 440     h2.write(&test_usize.to_ne_bytes());
 441     h2.write(&test_i8.to_ne_bytes());
 442     h2.write(&test_i16.to_ne_bytes());
 443     h2.write(&test_i32.to_ne_bytes());
 444     h2.write(&test_i64.to_ne_bytes());
 445     h2.write(&test_i128.to_ne_bytes());
 446     h2.write(&test_isize.to_ne_bytes());
 447
 448     let h1_hash = h1.finish128();
 449     let h2_hash = h2.finish128();
 450
 451     assert_eq!(h1_hash, h2_hash);
 452 }