Gecko [ naturenectar.co.uk ]

Name	Size	Permission	Date
aes.h	1015 B	-rw-r--r--	2021-11-05 09:03
align.h	569 B	-rw-r--r--	2021-11-05 09:03
app.h	6.97 KB	-rw-r--r--	2021-11-05 09:03
assertions.h	2.17 KB	-rw-r--r--	2021-11-05 09:03
astack.h	1.11 KB	-rw-r--r--	2021-11-05 09:03
atomic.h	3.01 KB	-rw-r--r--	2021-11-05 09:03
backtrace.h	3.8 KB	-rw-r--r--	2021-11-05 09:03
barrier.h	1.03 KB	-rw-r--r--	2021-11-05 09:03
base32.h	4.35 KB	-rw-r--r--	2021-11-05 09:03
base64.h	2.8 KB	-rw-r--r--	2021-11-05 09:03
bind9.h	829 B	-rw-r--r--	2021-11-05 09:03
buffer.h	29.91 KB	-rw-r--r--	2021-11-05 09:03
bufferlist.h	1.42 KB	-rw-r--r--	2021-11-05 09:03
cmocka.h	1.35 KB	-rw-r--r--	2021-11-05 09:03
commandline.h	1.67 KB	-rw-r--r--	2021-11-05 09:03
condition.h	1.87 KB	-rw-r--r--	2021-11-05 09:03
counter.h	1.88 KB	-rw-r--r--	2021-11-05 09:03
crc64.h	998 B	-rw-r--r--	2021-11-05 09:03
deprecated.h	662 B	-rw-r--r--	2021-11-05 09:03
dir.h	1.51 KB	-rw-r--r--	2021-11-05 09:03
endian.h	4.75 KB	-rw-r--r--	2021-11-05 09:03
errno.h	659 B	-rw-r--r--	2021-11-05 09:03
errno2result.h	901 B	-rw-r--r--	2025-07-29 21:44
error.h	1.4 KB	-rw-r--r--	2021-11-05 09:03
event.h	3.36 KB	-rw-r--r--	2021-11-05 09:03
eventclass.h	1.41 KB	-rw-r--r--	2021-11-05 09:03
file.h	11.4 KB	-rw-r--r--	2021-11-05 09:03
formatcheck.h	940 B	-rw-r--r--	2021-11-05 09:03
fsaccess.h	7.28 KB	-rw-r--r--	2021-11-05 09:03
fuzz.h	593 B	-rw-r--r--	2021-11-05 09:03
hash.h	1.61 KB	-rw-r--r--	2021-11-05 09:03
heap.h	5.14 KB	-rw-r--r--	2021-11-05 09:03
hex.h	2.74 KB	-rw-r--r--	2021-11-05 09:03
hmac.h	3.88 KB	-rw-r--r--	2021-11-05 09:03
hp.h	4.48 KB	-rw-r--r--	2021-11-05 09:03
ht.h	4.38 KB	-rw-r--r--	2025-07-29 21:41
httpd.h	2.24 KB	-rw-r--r--	2021-11-05 09:03
interfaceiter.h	3.07 KB	-rw-r--r--	2021-11-05 09:03
iterated_hash.h	933 B	-rw-r--r--	2021-11-05 09:03
lang.h	686 B	-rw-r--r--	2021-11-05 09:03
lex.h	9.77 KB	-rw-r--r--	2021-11-05 09:03
lfsr.h	2.89 KB	-rw-r--r--	2021-11-05 09:03
lib.h	1.13 KB	-rw-r--r--	2021-11-05 09:03
likely.h	868 B	-rw-r--r--	2021-11-05 09:03
list.h	7.9 KB	-rw-r--r--	2021-11-05 09:03
log.h	25.88 KB	-rw-r--r--	2021-11-05 09:03
magic.h	999 B	-rw-r--r--	2021-11-05 09:03
managers.h	776 B	-rw-r--r--	2021-11-05 09:03
md.h	5.63 KB	-rw-r--r--	2021-11-05 09:03
mem.h	17.66 KB	-rw-r--r--	2021-11-05 09:03
meminfo.h	710 B	-rw-r--r--	2021-11-05 09:03
mutex.h	4.08 KB	-rw-r--r--	2021-11-05 09:03
mutexatomic.h	9.56 KB	-rw-r--r--	2021-11-05 09:03
mutexblock.h	1.13 KB	-rw-r--r--	2021-11-05 09:03
net.h	8.36 KB	-rw-r--r--	2021-11-05 09:03
netaddr.h	4.67 KB	-rw-r--r--	2021-11-05 09:03
netdb.h	860 B	-rw-r--r--	2021-11-05 09:03
netmgr.h	15.36 KB	-rw-r--r--	2025-07-29 21:41
netscope.h	966 B	-rw-r--r--	2021-11-05 09:03
nonce.h	743 B	-rw-r--r--	2021-11-05 09:03
offset.h	687 B	-rw-r--r--	2021-11-05 09:03
once.h	767 B	-rw-r--r--	2021-11-05 09:03
os.h	670 B	-rw-r--r--	2021-11-05 09:03
parseint.h	1.5 KB	-rw-r--r--	2021-11-05 09:03
platform.h	1.82 KB	-rw-r--r--	2025-07-29 21:41
pool.h	3.41 KB	-rw-r--r--	2021-11-05 09:03
portset.h	3.22 KB	-rw-r--r--	2021-11-05 09:03
print.h	680 B	-rw-r--r--	2021-11-05 09:03
queue.h	1.31 KB	-rw-r--r--	2021-11-05 09:03
quota.h	3.48 KB	-rw-r--r--	2021-11-05 09:03
radix.h	6.85 KB	-rw-r--r--	2021-11-05 09:03
random.h	1.45 KB	-rw-r--r--	2021-11-05 09:03
ratelimiter.h	3.41 KB	-rw-r--r--	2021-11-05 09:03
refcount.h	4.98 KB	-rw-r--r--	2021-11-05 09:03
regex.h	767 B	-rw-r--r--	2021-11-05 09:03
region.h	2.18 KB	-rw-r--r--	2021-11-05 09:03
resource.h	2.79 KB	-rw-r--r--	2021-11-05 09:03
result.h	5.45 KB	-rw-r--r--	2021-11-05 09:03
resultclass.h	1.56 KB	-rw-r--r--	2021-11-05 09:03
rwlock.h	2.48 KB	-rw-r--r--	2021-11-05 09:03
safe.h	1.12 KB	-rw-r--r--	2021-11-05 09:03
serial.h	1.33 KB	-rw-r--r--	2021-11-05 09:03
siphash.h	916 B	-rw-r--r--	2021-11-05 09:03
sockaddr.h	6.13 KB	-rw-r--r--	2021-11-05 09:03
socket.h	23.55 KB	-rw-r--r--	2021-11-05 09:03
stat.h	803 B	-rw-r--r--	2021-11-05 09:03
stats.h	6.53 KB	-rw-r--r--	2021-11-05 09:03
stdatomic.h	8.9 KB	-rw-r--r--	2021-11-05 09:03
stdio.h	1.69 KB	-rw-r--r--	2021-11-05 09:03
stdtime.h	1.36 KB	-rw-r--r--	2021-11-05 09:03
strerr.h	575 B	-rw-r--r--	2021-11-05 09:03
string.h	851 B	-rw-r--r--	2021-11-05 09:03
symtab.h	4.22 KB	-rw-r--r--	2021-11-05 09:03
syslog.h	843 B	-rw-r--r--	2021-11-05 09:03
task.h	16.72 KB	-rw-r--r--	2021-11-05 09:03
taskpool.h	3.2 KB	-rw-r--r--	2021-11-05 09:03
thread.h	1.86 KB	-rw-r--r--	2021-11-05 09:03
time.h	10.85 KB	-rw-r--r--	2021-11-05 09:03
timer.h	7.77 KB	-rw-r--r--	2021-11-05 09:03
tm.h	894 B	-rw-r--r--	2021-11-05 09:03
types.h	5.72 KB	-rw-r--r--	2021-11-05 09:03
url.h	2.62 KB	-rw-r--r--	2021-11-05 09:03
utf8.h	928 B	-rw-r--r--	2021-11-05 09:03
util.h	13.96 KB	-rw-r--r--	2021-11-05 09:03
version.h	499 B	-rw-r--r--	2021-11-05 09:03

Rename

/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */

#ifndef ISC_LFSR_H
#define ISC_LFSR_H 1

/*! \file isc/lfsr.h */

#include <inttypes.h>

#include <isc/lang.h>
#include <isc/types.h>

typedef struct isc_lfsr isc_lfsr_t;

/*%
 * This function is called when reseeding is needed.  It is allowed to
 * modify any state in the LFSR in any way it sees fit OTHER THAN "bits".
 *
 * It MUST set "count" to a new value or the lfsr will never reseed again.
 *
 * Also, a reseed will never occur in the middle of an extraction.  This
 * is purely an optimization, and is probably what one would want.
 */
typedef void (*isc_lfsrreseed_t)(isc_lfsr_t *, void *);

/*%
 * The members of this structure can be used by the application, but care
 * needs to be taken to not change state once the lfsr is in operation.
 */
struct isc_lfsr {
	uint32_t	 state;	 /*%< previous state */
	unsigned int	 bits;	 /*%< length */
	uint32_t	 tap;	 /*%< bit taps */
	unsigned int	 count;	 /*%< reseed count (in BITS!) */
	isc_lfsrreseed_t reseed; /*%< reseed function */
	void	     *arg;	 /*%< reseed function argument */
};

ISC_LANG_BEGINDECLS

void
isc_lfsr_init(isc_lfsr_t *lfsr, uint32_t state, unsigned int bits, uint32_t tap,
	      unsigned int count, isc_lfsrreseed_t reseed, void *arg);
/*%<
 * Initialize an LFSR.
 *
 * Note:
 *
 *\li	Putting untrusted values into this function will cause the LFSR to
 *	generate (perhaps) non-maximal length sequences.
 *
 * Requires:
 *
 *\li	lfsr != NULL
 *
 *\li	8 <= bits <= 32
 *
 *\li	tap != 0
 */

void
isc_lfsr_generate(isc_lfsr_t *lfsr, void *data, unsigned int count);
/*%<
 * Returns "count" bytes of data from the LFSR.
 *
 * Requires:
 *
 *\li	lfsr be valid.
 *
 *\li	data != NULL.
 *
 *\li	count > 0.
 */

void
isc_lfsr_skip(isc_lfsr_t *lfsr, unsigned int skip);
/*%<
 * Skip "skip" states.
 *
 * Requires:
 *
 *\li	lfsr be valid.
 */

uint32_t
isc_lfsr_generate32(isc_lfsr_t *lfsr1, isc_lfsr_t *lfsr2);
/*%<
 * Given two LFSRs, use the current state from each to skip entries in the
 * other.  The next states are then xor'd together and returned.
 *
 * WARNING:
 *
 *\li	This function is used only for very, very low security data, such
 *	as DNS message IDs where it is desired to have an unpredictable
 *	stream of bytes that are harder to predict than a simple flooding
 *	attack.
 *
 * Notes:
 *
 *\li	Since the current state from each of the LFSRs is used to skip
 *	state in the other, it is important that no state be leaked
 *	from either LFSR.
 *
 * Requires:
 *
 *\li	lfsr1 and lfsr2 be valid.
 *
 *\li	1 <= skipbits <= 31
 */

ISC_LANG_ENDDECLS

#endif /* ISC_LFSR_H */