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Diffstat (limited to 'src/lib/libcrypto/lhash/lhash.c')
-rw-r--r-- | src/lib/libcrypto/lhash/lhash.c | 433 |
1 files changed, 0 insertions, 433 deletions
diff --git a/src/lib/libcrypto/lhash/lhash.c b/src/lib/libcrypto/lhash/lhash.c deleted file mode 100644 index aa532267de..0000000000 --- a/src/lib/libcrypto/lhash/lhash.c +++ /dev/null | |||
@@ -1,433 +0,0 @@ | |||
1 | /* $OpenBSD: lhash.c,v 1.28 2024/07/14 14:32:45 jsing Exp $ */ | ||
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | ||
3 | * All rights reserved. | ||
4 | * | ||
5 | * This package is an SSL implementation written | ||
6 | * by Eric Young (eay@cryptsoft.com). | ||
7 | * The implementation was written so as to conform with Netscapes SSL. | ||
8 | * | ||
9 | * This library is free for commercial and non-commercial use as long as | ||
10 | * the following conditions are aheared to. The following conditions | ||
11 | * apply to all code found in this distribution, be it the RC4, RSA, | ||
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | ||
13 | * included with this distribution is covered by the same copyright terms | ||
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | ||
15 | * | ||
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | ||
17 | * the code are not to be removed. | ||
18 | * If this package is used in a product, Eric Young should be given attribution | ||
19 | * as the author of the parts of the library used. | ||
20 | * This can be in the form of a textual message at program startup or | ||
21 | * in documentation (online or textual) provided with the package. | ||
22 | * | ||
23 | * Redistribution and use in source and binary forms, with or without | ||
24 | * modification, are permitted provided that the following conditions | ||
25 | * are met: | ||
26 | * 1. Redistributions of source code must retain the copyright | ||
27 | * notice, this list of conditions and the following disclaimer. | ||
28 | * 2. Redistributions in binary form must reproduce the above copyright | ||
29 | * notice, this list of conditions and the following disclaimer in the | ||
30 | * documentation and/or other materials provided with the distribution. | ||
31 | * 3. All advertising materials mentioning features or use of this software | ||
32 | * must display the following acknowledgement: | ||
33 | * "This product includes cryptographic software written by | ||
34 | * Eric Young (eay@cryptsoft.com)" | ||
35 | * The word 'cryptographic' can be left out if the rouines from the library | ||
36 | * being used are not cryptographic related :-). | ||
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | ||
38 | * the apps directory (application code) you must include an acknowledgement: | ||
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | ||
40 | * | ||
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | ||
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | ||
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||
51 | * SUCH DAMAGE. | ||
52 | * | ||
53 | * The licence and distribution terms for any publically available version or | ||
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | ||
55 | * copied and put under another distribution licence | ||
56 | * [including the GNU Public Licence.] | ||
57 | */ | ||
58 | |||
59 | #include <stdio.h> | ||
60 | #include <string.h> | ||
61 | #include <stdlib.h> | ||
62 | |||
63 | #include <openssl/opensslconf.h> | ||
64 | |||
65 | #include <openssl/crypto.h> | ||
66 | #include <openssl/lhash.h> | ||
67 | |||
68 | #undef MIN_NODES | ||
69 | #define MIN_NODES 16 | ||
70 | #define UP_LOAD (2*LH_LOAD_MULT) /* load times 256 (default 2) */ | ||
71 | #define DOWN_LOAD (LH_LOAD_MULT) /* load times 256 (default 1) */ | ||
72 | |||
73 | typedef struct lhash_node_st { | ||
74 | void *data; | ||
75 | struct lhash_node_st *next; | ||
76 | #ifndef OPENSSL_NO_HASH_COMP | ||
77 | unsigned long hash; | ||
78 | #endif | ||
79 | } LHASH_NODE; | ||
80 | |||
81 | struct lhash_st { | ||
82 | LHASH_NODE **b; | ||
83 | LHASH_COMP_FN_TYPE comp; | ||
84 | LHASH_HASH_FN_TYPE hash; | ||
85 | unsigned int num_nodes; | ||
86 | unsigned int num_alloc_nodes; | ||
87 | unsigned int p; | ||
88 | unsigned int pmax; | ||
89 | unsigned long up_load; /* load times 256 */ | ||
90 | unsigned long down_load; /* load times 256 */ | ||
91 | unsigned long num_items; | ||
92 | |||
93 | int error; | ||
94 | } /* _LHASH */; | ||
95 | |||
96 | static void | ||
97 | expand(_LHASH *lh) | ||
98 | { | ||
99 | LHASH_NODE **n, **n1, **n2, *np; | ||
100 | unsigned int p, i, j; | ||
101 | unsigned long hash, nni; | ||
102 | |||
103 | lh->num_nodes++; | ||
104 | p = (int)lh->p++; | ||
105 | n1 = &(lh->b[p]); | ||
106 | n2 = &(lh->b[p + (int)lh->pmax]); | ||
107 | *n2 = NULL; /* 27/07/92 - eay - undefined pointer bug */ | ||
108 | nni = lh->num_alloc_nodes; | ||
109 | |||
110 | for (np = *n1; np != NULL; ) { | ||
111 | #ifndef OPENSSL_NO_HASH_COMP | ||
112 | hash = np->hash; | ||
113 | #else | ||
114 | hash = lh->hash(np->data); | ||
115 | #endif | ||
116 | if ((hash % nni) != p) { /* move it */ | ||
117 | *n1 = (*n1)->next; | ||
118 | np->next= *n2; | ||
119 | *n2 = np; | ||
120 | } else | ||
121 | n1 = &((*n1)->next); | ||
122 | np= *n1; | ||
123 | } | ||
124 | |||
125 | if ((lh->p) >= lh->pmax) { | ||
126 | j = (int)lh->num_alloc_nodes * 2; | ||
127 | n = reallocarray(lh->b, j, sizeof(LHASH_NODE *)); | ||
128 | if (n == NULL) { | ||
129 | /* fputs("realloc error in lhash", stderr); */ | ||
130 | lh->error++; | ||
131 | lh->p = 0; | ||
132 | return; | ||
133 | } | ||
134 | /* else */ | ||
135 | for (i = (int)lh->num_alloc_nodes; i < j; i++)/* 26/02/92 eay */ | ||
136 | n[i] = NULL; /* 02/03/92 eay */ | ||
137 | lh->pmax = lh->num_alloc_nodes; | ||
138 | lh->num_alloc_nodes = j; | ||
139 | lh->p = 0; | ||
140 | lh->b = n; | ||
141 | } | ||
142 | } | ||
143 | |||
144 | static void | ||
145 | contract(_LHASH *lh) | ||
146 | { | ||
147 | LHASH_NODE **n, *n1, *np; | ||
148 | |||
149 | np = lh->b[lh->p + lh->pmax - 1]; | ||
150 | lh->b[lh->p+lh->pmax - 1] = NULL; /* 24/07-92 - eay - weird but :-( */ | ||
151 | if (lh->p == 0) { | ||
152 | n = reallocarray(lh->b, lh->pmax, sizeof(LHASH_NODE *)); | ||
153 | if (n == NULL) { | ||
154 | /* fputs("realloc error in lhash", stderr); */ | ||
155 | lh->error++; | ||
156 | return; | ||
157 | } | ||
158 | lh->num_alloc_nodes /= 2; | ||
159 | lh->pmax /= 2; | ||
160 | lh->p = lh->pmax - 1; | ||
161 | lh->b = n; | ||
162 | } else | ||
163 | lh->p--; | ||
164 | |||
165 | lh->num_nodes--; | ||
166 | |||
167 | n1 = lh->b[(int)lh->p]; | ||
168 | if (n1 == NULL) | ||
169 | lh->b[(int)lh->p] = np; | ||
170 | else { | ||
171 | while (n1->next != NULL) | ||
172 | n1 = n1->next; | ||
173 | n1->next = np; | ||
174 | } | ||
175 | } | ||
176 | |||
177 | static LHASH_NODE ** | ||
178 | getrn(_LHASH *lh, const void *data, unsigned long *rhash) | ||
179 | { | ||
180 | LHASH_NODE **ret, *n1; | ||
181 | unsigned long hash, nn; | ||
182 | LHASH_COMP_FN_TYPE cf; | ||
183 | |||
184 | hash = (*(lh->hash))(data); | ||
185 | *rhash = hash; | ||
186 | |||
187 | nn = hash % lh->pmax; | ||
188 | if (nn < lh->p) | ||
189 | nn = hash % lh->num_alloc_nodes; | ||
190 | |||
191 | cf = lh->comp; | ||
192 | ret = &(lh->b[(int)nn]); | ||
193 | for (n1 = *ret; n1 != NULL; n1 = n1->next) { | ||
194 | #ifndef OPENSSL_NO_HASH_COMP | ||
195 | if (n1->hash != hash) { | ||
196 | ret = &(n1->next); | ||
197 | continue; | ||
198 | } | ||
199 | #endif | ||
200 | if (cf(n1->data, data) == 0) | ||
201 | break; | ||
202 | ret = &(n1->next); | ||
203 | } | ||
204 | return (ret); | ||
205 | } | ||
206 | |||
207 | _LHASH * | ||
208 | lh_new(LHASH_HASH_FN_TYPE h, LHASH_COMP_FN_TYPE c) | ||
209 | { | ||
210 | _LHASH *ret; | ||
211 | |||
212 | if ((ret = calloc(1, sizeof(_LHASH))) == NULL) | ||
213 | return NULL; | ||
214 | if ((ret->b = calloc(MIN_NODES, sizeof(LHASH_NODE *))) == NULL) { | ||
215 | free(ret); | ||
216 | return NULL; | ||
217 | } | ||
218 | ret->comp = ((c == NULL) ? (LHASH_COMP_FN_TYPE)strcmp : c); | ||
219 | ret->hash = ((h == NULL) ? (LHASH_HASH_FN_TYPE)lh_strhash : h); | ||
220 | ret->num_nodes = MIN_NODES / 2; | ||
221 | ret->num_alloc_nodes = MIN_NODES; | ||
222 | ret->pmax = MIN_NODES / 2; | ||
223 | ret->up_load = UP_LOAD; | ||
224 | ret->down_load = DOWN_LOAD; | ||
225 | |||
226 | return (ret); | ||
227 | } | ||
228 | LCRYPTO_ALIAS(lh_new); | ||
229 | |||
230 | void | ||
231 | lh_free(_LHASH *lh) | ||
232 | { | ||
233 | unsigned int i; | ||
234 | LHASH_NODE *n, *nn; | ||
235 | |||
236 | if (lh == NULL) | ||
237 | return; | ||
238 | |||
239 | for (i = 0; i < lh->num_nodes; i++) { | ||
240 | n = lh->b[i]; | ||
241 | while (n != NULL) { | ||
242 | nn = n->next; | ||
243 | free(n); | ||
244 | n = nn; | ||
245 | } | ||
246 | } | ||
247 | free(lh->b); | ||
248 | free(lh); | ||
249 | } | ||
250 | LCRYPTO_ALIAS(lh_free); | ||
251 | |||
252 | int | ||
253 | lh_error(_LHASH *lh) | ||
254 | { | ||
255 | return lh->error; | ||
256 | } | ||
257 | LCRYPTO_ALIAS(lh_error); | ||
258 | |||
259 | void * | ||
260 | lh_insert(_LHASH *lh, void *data) | ||
261 | { | ||
262 | unsigned long hash; | ||
263 | LHASH_NODE *nn, **rn; | ||
264 | void *ret; | ||
265 | |||
266 | lh->error = 0; | ||
267 | if (lh->up_load <= (lh->num_items * LH_LOAD_MULT / lh->num_nodes)) | ||
268 | expand(lh); | ||
269 | |||
270 | rn = getrn(lh, data, &hash); | ||
271 | |||
272 | if (*rn == NULL) { | ||
273 | if ((nn = malloc(sizeof(LHASH_NODE))) == NULL) { | ||
274 | lh->error++; | ||
275 | return (NULL); | ||
276 | } | ||
277 | nn->data = data; | ||
278 | nn->next = NULL; | ||
279 | #ifndef OPENSSL_NO_HASH_COMP | ||
280 | nn->hash = hash; | ||
281 | #endif | ||
282 | *rn = nn; | ||
283 | ret = NULL; | ||
284 | lh->num_items++; | ||
285 | } | ||
286 | else /* replace same key */ | ||
287 | { | ||
288 | ret = (*rn)->data; | ||
289 | (*rn)->data = data; | ||
290 | } | ||
291 | return (ret); | ||
292 | } | ||
293 | LCRYPTO_ALIAS(lh_insert); | ||
294 | |||
295 | void * | ||
296 | lh_delete(_LHASH *lh, const void *data) | ||
297 | { | ||
298 | unsigned long hash; | ||
299 | LHASH_NODE *nn, **rn; | ||
300 | void *ret; | ||
301 | |||
302 | lh->error = 0; | ||
303 | rn = getrn(lh, data, &hash); | ||
304 | |||
305 | if (*rn == NULL) { | ||
306 | return (NULL); | ||
307 | } else { | ||
308 | nn= *rn; | ||
309 | *rn = nn->next; | ||
310 | ret = nn->data; | ||
311 | free(nn); | ||
312 | } | ||
313 | |||
314 | lh->num_items--; | ||
315 | if ((lh->num_nodes > MIN_NODES) && | ||
316 | (lh->down_load >= (lh->num_items * LH_LOAD_MULT / lh->num_nodes))) | ||
317 | contract(lh); | ||
318 | |||
319 | return (ret); | ||
320 | } | ||
321 | LCRYPTO_ALIAS(lh_delete); | ||
322 | |||
323 | void * | ||
324 | lh_retrieve(_LHASH *lh, const void *data) | ||
325 | { | ||
326 | unsigned long hash; | ||
327 | LHASH_NODE **rn; | ||
328 | void *ret; | ||
329 | |||
330 | lh->error = 0; | ||
331 | rn = getrn(lh, data, &hash); | ||
332 | |||
333 | if (*rn == NULL) { | ||
334 | return (NULL); | ||
335 | } else { | ||
336 | ret = (*rn)->data; | ||
337 | } | ||
338 | return (ret); | ||
339 | } | ||
340 | LCRYPTO_ALIAS(lh_retrieve); | ||
341 | |||
342 | static void | ||
343 | doall_util_fn(_LHASH *lh, int use_arg, LHASH_DOALL_FN_TYPE func, | ||
344 | LHASH_DOALL_ARG_FN_TYPE func_arg, void *arg) | ||
345 | { | ||
346 | LHASH_NODE *a, *n; | ||
347 | int down_load; | ||
348 | int i; | ||
349 | |||
350 | if (lh == NULL) | ||
351 | return; | ||
352 | |||
353 | /* | ||
354 | * Disable contraction of the hash while walking, as some consumers use | ||
355 | * it to delete hash entries. A better option would be to snapshot the | ||
356 | * hash, making it insert safe as well. | ||
357 | */ | ||
358 | down_load = lh->down_load; | ||
359 | lh->down_load = 0; | ||
360 | |||
361 | /* reverse the order so we search from 'top to bottom' | ||
362 | * We were having memory leaks otherwise */ | ||
363 | for (i = lh->num_nodes - 1; i >= 0; i--) { | ||
364 | a = lh->b[i]; | ||
365 | while (a != NULL) { | ||
366 | /* 28/05/91 - eay - n added so items can be deleted | ||
367 | * via lh_doall */ | ||
368 | /* 22/05/08 - ben - eh? since a is not passed, | ||
369 | * this should not be needed */ | ||
370 | n = a->next; | ||
371 | if (use_arg) | ||
372 | func_arg(a->data, arg); | ||
373 | else | ||
374 | func(a->data); | ||
375 | a = n; | ||
376 | } | ||
377 | } | ||
378 | |||
379 | /* Restore down load factor and trigger contraction. */ | ||
380 | lh->down_load = down_load; | ||
381 | if ((lh->num_nodes > MIN_NODES) && | ||
382 | (lh->down_load >= (lh->num_items * LH_LOAD_MULT / lh->num_nodes))) | ||
383 | contract(lh); | ||
384 | } | ||
385 | |||
386 | void | ||
387 | lh_doall(_LHASH *lh, LHASH_DOALL_FN_TYPE func) | ||
388 | { | ||
389 | doall_util_fn(lh, 0, func, (LHASH_DOALL_ARG_FN_TYPE)0, NULL); | ||
390 | } | ||
391 | LCRYPTO_ALIAS(lh_doall); | ||
392 | |||
393 | void | ||
394 | lh_doall_arg(_LHASH *lh, LHASH_DOALL_ARG_FN_TYPE func, void *arg) | ||
395 | { | ||
396 | doall_util_fn(lh, 1, (LHASH_DOALL_FN_TYPE)0, func, arg); | ||
397 | } | ||
398 | LCRYPTO_ALIAS(lh_doall_arg); | ||
399 | |||
400 | /* The following hash seems to work very well on normal text strings | ||
401 | * no collisions on /usr/dict/words and it distributes on %2^n quite | ||
402 | * well, not as good as MD5, but still good. | ||
403 | */ | ||
404 | unsigned long | ||
405 | lh_strhash(const char *c) | ||
406 | { | ||
407 | unsigned long ret = 0; | ||
408 | unsigned long n, v; | ||
409 | unsigned int r; | ||
410 | |||
411 | if (c == NULL || *c == '\0') | ||
412 | return ret; | ||
413 | |||
414 | n = 0x100; | ||
415 | while (*c) { | ||
416 | v = n | *c; | ||
417 | n += 0x100; | ||
418 | if ((r = ((v >> 2) ^ v) & 0x0f) != 0) | ||
419 | ret = (ret << r) | (ret >> (32 - r)); | ||
420 | ret &= 0xFFFFFFFFUL; | ||
421 | ret ^= v * v; | ||
422 | c++; | ||
423 | } | ||
424 | return (ret >> 16) ^ ret; | ||
425 | } | ||
426 | LCRYPTO_ALIAS(lh_strhash); | ||
427 | |||
428 | unsigned long | ||
429 | lh_num_items(const _LHASH *lh) | ||
430 | { | ||
431 | return lh ? lh->num_items : 0; | ||
432 | } | ||
433 | LCRYPTO_ALIAS(lh_num_items); | ||