lib/isc/hash.c

148 	isc_hash_t *hctx;
166 	hctx = isc_mem_get(mctx, sizeof(isc_hash_t));
167 	if (hctx == NULL)
180 	result = isc_mutex_init(&hctx->lock);
187 	hctx->magic = HASH_MAGIC;
188 	hctx->mctx = NULL;
189 	isc_mem_attach(mctx, &hctx->mctx);
190 	hctx->initialized = ISC_FALSE;
191 	result = isc_refcount_init(&hctx->refcnt, 1);
194 	hctx->entropy = NULL;
195 	hctx->limit = limit;
196 	hctx->vectorlen = vlen;
197 	hctx->rndvector = rv;
200 		isc_entropy_attach(entropy, &hctx->entropy);
202 	*hctxp = hctx;
206 	DESTROYLOCK(&hctx->lock);
208 	isc_mem_put(mctx, hctx, sizeof(isc_hash_t));
240 isc_hash_ctxinit(isc_hash_t *hctx) {
243 	LOCK(&hctx->lock);
245 	if (hctx->initialized == ISC_TRUE)
248 	if (hctx->entropy) {
249 		result = isc_entropy_getdata(hctx->entropy,
250 					     hctx->rndvector, hctx->vectorlen,
258 		p = (unsigned char *)hctx->rndvector;
259 		for (i = 0; i < hctx->vectorlen; i += copylen, p += copylen) {
261 			if (i + sizeof(pr) <= hctx->vectorlen)
264 				copylen = hctx->vectorlen - i;
268 		INSIST(p == (unsigned char *)hctx->rndvector +
269 		       hctx->vectorlen);
272 	hctx->initialized = ISC_TRUE;
275 	UNLOCK(&hctx->lock);
286 isc_hash_ctxattach(isc_hash_t *hctx, isc_hash_t **hctxp) {
287 	REQUIRE(VALID_HASH(hctx));
290 	isc_refcount_increment(&hctx->refcnt, NULL);
291 	*hctxp = hctx;
296 	isc_hash_t *hctx;
300 	hctx = *hctxp;
303 	LOCK(&hctx->lock);
305 	isc_refcount_destroy(&hctx->refcnt);
307 	mctx = hctx->mctx;
308 	if (hctx->entropy != NULL)
309 		isc_entropy_detach(&hctx->entropy);
310 	if (hctx->rndvector != NULL)
311 		isc_mem_put(mctx, hctx->rndvector, hctx->vectorlen);
313 	UNLOCK(&hctx->lock);
315 	DESTROYLOCK(&hctx->lock);
317 	memset(hctx, 0, sizeof(isc_hash_t));
318 	isc_mem_put(mctx, hctx, sizeof(isc_hash_t));
324 	isc_hash_t *hctx;
328 	hctx = *hctxp;
330 	isc_refcount_decrement(&hctx->refcnt, &refs);
332 		destroy(&hctx);
350 hash_calc(isc_hash_t *hctx, const unsigned char *key, unsigned int keylen,
354 	hash_random_t *p = hctx->rndvector;
358 	if (hctx->initialized == ISC_FALSE)
359 		isc_hash_ctxinit(hctx);
375 isc_hash_ctxcalc(isc_hash_t *hctx, const unsigned char *key,
378 	REQUIRE(hctx != NULL && VALID_HASH(hctx));
379 	REQUIRE(keylen <= hctx->limit);
381 	return (hash_calc(hctx, key, keylen, case_sensitive));