1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
/*-
* Copyright 2016 Vsevolod Stakhov
*
* 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.
*/
#include "config.h"
#include "rspamd.h"
#include "shingles.h"
#include "ottery.h"
#include <math.h>
static const gchar *
algorithm_to_string (enum rspamd_shingle_alg alg)
{
const gchar *ret = "unknown";
switch (alg) {
case RSPAMD_SHINGLES_OLD:
ret = "siphash";
break;
case RSPAMD_SHINGLES_XXHASH:
ret = "xxhash";
break;
case RSPAMD_SHINGLES_MUMHASH:
ret = "mumhash";
break;
case RSPAMD_SHINGLES_FAST:
ret = "fasthash";
break;
}
return ret;
}
static void
generate_random_string (char *begin, size_t len)
{
gsize i;
for (i = 0; i < len; i ++) {
begin[i] = ottery_rand_range ('z' - 'a') + 'a';
}
}
static GArray *
generate_fuzzy_words (gsize cnt, gsize max_len)
{
GArray *res;
gsize i, wlen;
rspamd_ftok_t w;
char *t;
res = g_array_sized_new (FALSE, FALSE, sizeof (rspamd_ftok_t), cnt);
for (i = 0; i < cnt; i ++) {
wlen = ottery_rand_range (max_len) + 1;
/* wlen = max_len; */
w.len = wlen;
t = g_malloc (wlen);
generate_random_string (t, wlen);
w.begin = t;
g_array_append_val (res, w);
}
return res;
}
static void
permute_vector (GArray *in, gdouble prob)
{
gsize i, total = 0;
rspamd_ftok_t *w;
for (i = 0; i < in->len; i ++) {
if (ottery_rand_unsigned () <= G_MAXUINT * prob) {
w = &g_array_index (in, rspamd_ftok_t, i);
generate_random_string ((gchar *)w->begin, w->len);
total ++;
}
}
msg_debug ("generated %z permutations of %ud words", total, in->len);
}
static void
free_fuzzy_words (GArray *ar)
{
gsize i;
rspamd_ftok_t *w;
for (i = 0; i < ar->len; i ++) {
w = &g_array_index (ar, rspamd_ftok_t, i);
g_free ((gpointer)w->begin);
}
}
static void
test_case (gsize cnt, gsize max_len, gdouble perm_factor,
enum rspamd_shingle_alg alg)
{
GArray *input;
struct rspamd_shingle *sgl, *sgl_permuted;
gdouble res;
guchar key[16];
gdouble ts1, ts2;
ottery_rand_bytes (key, sizeof (key));
input = generate_fuzzy_words (cnt, max_len);
ts1 = rspamd_get_virtual_ticks ();
sgl = rspamd_shingles_from_text (input, key, NULL,
rspamd_shingles_default_filter, NULL, alg);
ts2 = rspamd_get_virtual_ticks ();
permute_vector (input, perm_factor);
sgl_permuted = rspamd_shingles_from_text (input, key, NULL,
rspamd_shingles_default_filter, NULL, alg);
res = rspamd_shingles_compare (sgl, sgl_permuted);
msg_info ("%s (%z words of %z max len, %.2f perm factor):"
" percentage of common shingles: %.3f, generate time: %.4f sec",
algorithm_to_string (alg), cnt, max_len, perm_factor, res, ts2 - ts1);
//g_assert_cmpfloat (fabs ((1.0 - res) - sqrt (perm_factor)), <=, 0.25);
free_fuzzy_words (input);
g_free (sgl);
g_free (sgl_permuted);
}
static const guint64 expected_old[RSPAMD_SHINGLE_SIZE] = {
0x2a97e024235cedc5, 0x46238acbcc55e9e0, 0x2378ff151af075b3, 0xde1f29a95cad109,
0x5d3bbbdb5db5d19f, 0x4d75a0ec52af10a6, 0x215ecd6372e755b5, 0x7b52295758295350,
0x17387d1beddc7f62, 0x26264ca879ffcada, 0x49d4a65ec0ab9914, 0xa2763e6995350cf,
0x3f4570231449c13f, 0x3309f857a0e54ee5, 0x24e4c5b561b0fce3, 0x1f153e3b275bfd1b,
0x4d067dbc97c3fd78, 0x9ffa2d076fa4f8bc, 0x3d8907f84b9ffc6c, 0x1cfd664c5262d256,
0xcdd7e744b699c15, 0x5544a2bbe05124f7, 0x5a4029b5d6a06f7, 0xd5adfbdc756c0e4,
0xa504b23d9689a67e, 0x15d945f7007de115, 0xbf676c0522a2c51d, 0x1c8d8163ad4b0f93,
0xa2c4ba20799344d7, 0x27c6f13c02134388, 0xa1d443d31fd5a3, 0x99fbca9f8563080,
};
static const guint64 expected_xxhash[RSPAMD_SHINGLE_SIZE] = {
0x33b134be11a705a, 0x36e2ea657aa36903, 0x6547b57f7470ce9d, 0x8253eb6d2f8f158e,
0x1cc99e3cf22388f, 0x2396da27ea36ffe8, 0x1b457d208ad3d96c, 0x2d6ac733d7a2c107,
0x17849cbed75cc4d1, 0x4dd94e772330e804, 0x39f592fa32014ed4, 0xa2f6229ad356461,
0x6dc825879a057b37, 0x886b12cef4338b05, 0x8b23af68c186518a, 0x16932b40339aaf02,
0x412090c6bb0b719c, 0x4d4a88cbdf1935f3, 0x233bcbddb5f67a7, 0x474719442a33dcca,
0x2da7ec30563e622, 0x7ab90086960e1ad2, 0x3ea2b45582539f75, 0x108cd9287d95a6c5,
0x69ba7c67c115597, 0x10880860eb75e982, 0x16f3d90e6ab995a6, 0x5f24ea09379b9f5c,
0x3c2dc04088e8fe54, 0x340b8cf1c6f1227, 0x193bc348ed2e9ce7, 0x68454ef43da9c748,
};
static const guint64 expected_mumhash[RSPAMD_SHINGLE_SIZE] = {
0x38d35473b80a7fc3, 0x1300531adc2d16a1, 0x26883bc89f78f4bd, 0x57de365ef6d1a62,
0x773603185fcbb20a, 0x39c6cbd7ebbeaa88, 0x676c7445ad167e70, 0x432315d1ecc4c0b1,
0x1380b95756dbb078, 0x9ee12832fa53b90e, 0x72970be210f0dd0b, 0x62909bd520f5956,
0x66196965a45eb32a, 0x2466a9ca5436620e, 0x157b828b10e10f6e, 0x429bb673a523a7e5,
0x51a6ace94f320f88, 0x23f53a30bd7d7147, 0xbee557664d3bc34c, 0x65730c88cd212a9,
0x87e72c0cd05fd0e, 0x417a744669baeb3d, 0x78e26f7917829324, 0x439777dcfc25fdf4,
0x582eac6ff013f00b, 0x1e40aa90e367f4af, 0x301d14a28d6c23a2, 0x34140ecb21b6c69,
0x390a091c8b4c31b9, 0x2e35fecf9fff0ae7, 0x94322e1a5cf31f1b, 0x33cb9190905e049a,
};
static const guint64 expected_fasthash[RSPAMD_SHINGLE_SIZE] = {
0x3843a716f94828a6, 0x13fd5386dda3b28d, 0x71cb09de527c40a, 0x5d6f59ffd839c62,
0x7ce3633acd568476, 0x9014298cbd00167, 0x6708ec29eedb5350, 0x2882931ff2c5c410,
0x1839d8b947b12571, 0x58f7bc3829173302, 0x4dac8103da51abc4, 0x6c5cbcc6fb1de28,
0x31fefcef9bafb755, 0x6f2d1a0b1feca401, 0x3e71f3718e520b06, 0x42f6ba11164ab231,
0x21164d010bd76f4a, 0x4c597ccc7b60f620, 0x2cf1ca3383b77574, 0x54ff9c01660b8add,
0x2ca344758f40380d, 0x1b962321bd37d0f2, 0x9323bb99c32bc418, 0x375659d0eef2b8f2,
0x1dbd23a1030084b7, 0x83cb978dee06aa0a, 0x42c97be5b27a7763, 0x3b6d6b7270ed765,
0x125c12fdba584aed, 0x1c826397afe58763, 0x8bdbe2d43f3eda96, 0x954cda70edf6591f,
};
void
rspamd_shingles_test_func (void)
{
enum rspamd_shingle_alg alg = RSPAMD_SHINGLES_OLD;
struct rspamd_shingle *sgl;
guchar key[16];
GArray *input;
rspamd_ftok_t tok;
int i;
memset (key, 0, sizeof (key));
input = g_array_sized_new (FALSE, FALSE, sizeof (rspamd_ftok_t), 5);
for (i = 0; i < 5; i ++) {
gchar *b = g_alloca (8);
memset (b, 0, 8);
memcpy (b + 1, "test", 4);
b[0] = 'a' + i;
tok.begin = b;
tok.len = 5 + ((i + 1) % 4);
g_array_append_val (input, tok);
}
sgl = rspamd_shingles_from_text (input, key, NULL,
rspamd_shingles_default_filter, NULL, RSPAMD_SHINGLES_OLD);
for (i = 0; i < RSPAMD_SHINGLE_SIZE; i ++) {
g_assert (sgl->hashes[i] == expected_old[i]);
}
g_free (sgl);
sgl = rspamd_shingles_from_text (input, key, NULL,
rspamd_shingles_default_filter, NULL, RSPAMD_SHINGLES_XXHASH);
for (i = 0; i < RSPAMD_SHINGLE_SIZE; i ++) {
g_assert (sgl->hashes[i] == expected_xxhash[i]);
}
g_free (sgl);
sgl = rspamd_shingles_from_text (input, key, NULL,
rspamd_shingles_default_filter, NULL, RSPAMD_SHINGLES_MUMHASH);
for (i = 0; i < RSPAMD_SHINGLE_SIZE; i ++) {
g_assert (sgl->hashes[i] == expected_mumhash[i]);
}
g_free (sgl);
sgl = rspamd_shingles_from_text (input, key, NULL,
rspamd_shingles_default_filter, NULL, RSPAMD_SHINGLES_FAST);
for (i = 0; i < RSPAMD_SHINGLE_SIZE; i ++) {
g_assert (sgl->hashes[i] == expected_fasthash[i]);
}
g_free (sgl);
for (alg = RSPAMD_SHINGLES_OLD; alg <= RSPAMD_SHINGLES_FAST; alg ++) {
test_case (200, 10, 0.1, alg);
test_case (500, 20, 0.01, alg);
test_case (5000, 20, 0.01, alg);
test_case (5000, 15, 0, alg);
test_case (5000, 30, 1.0, alg);
test_case (50000, 30, 0.02, alg);
test_case (50000, 5, 0.02, alg);
test_case (50000, 16, 0.02, alg);
}
}
|
