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mirror of https://git.FreeBSD.org/src.git synced 2024-12-24 11:29:10 +00:00
freebsd/contrib/bind9/lib/isccc/base64.c
Doug Barton 37bb75f740 Upgrade to 9.6-ESV-R4-P1, which address the following issues:
1. Very large RRSIG RRsets included in a negative cache can trigger
an assertion failure that will crash named (BIND 9 DNS) due to an
off-by-one error in a buffer size check.

This bug affects all resolving name servers, whether DNSSEC validation
is enabled or not, on all BIND versions prior to today. There is a
possibility of malicious exploitation of this bug by remote users.

2. Named could fail to validate zones listed in a DLV that validated
insecure without using DLV and had DS records in the parent zone.

Add a patch provided by ru@ and confirmed by ISC to fix a crash at
shutdown time when a SIG(0) key is being used.
2011-05-28 00:21:28 +00:00

79 lines
2.8 KiB
C

/*
* Portions Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
* Portions Copyright (C) 2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NOMINUM DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Portions Copyright (C) 2001 Nominum, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NOMINUM DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: base64.c,v 1.8 2007-08-28 07:20:43 tbox Exp $ */
/*! \file */
#include <config.h>
#include <isc/base64.h>
#include <isc/buffer.h>
#include <isc/region.h>
#include <isc/result.h>
#include <isccc/base64.h>
#include <isccc/result.h>
#include <isccc/util.h>
isc_result_t
isccc_base64_encode(isccc_region_t *source, int wordlength,
const char *wordbreak, isccc_region_t *target)
{
isc_region_t sr;
isc_buffer_t tb;
isc_result_t result;
sr.base = source->rstart;
sr.length = source->rend - source->rstart;
isc_buffer_init(&tb, target->rstart, target->rend - target->rstart);
result = isc_base64_totext(&sr, wordlength, wordbreak, &tb);
if (result != ISC_R_SUCCESS)
return (result);
source->rstart = source->rend;
target->rstart = isc_buffer_used(&tb);
return (ISC_R_SUCCESS);
}
isc_result_t
isccc_base64_decode(const char *cstr, isccc_region_t *target) {
isc_buffer_t b;
isc_result_t result;
isc_buffer_init(&b, target->rstart, target->rend - target->rstart);
result = isc_base64_decodestring(cstr, &b);
if (result != ISC_R_SUCCESS)
return (result);
target->rstart = isc_buffer_used(&b);
return (ISC_R_SUCCESS);
}