1.6 KiB
Copyright (C) Internet Systems Consortium, Inc. ("ISC")
SPDX-License-Identifier: MPL-2.0
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See the COPYRIGHT file distributed with this work for additional information regarding copyright ownership.
The rsabigexponent test is used to check max-rsa-exponent-size.
We only run this test on builds without PKCS#11, as we have control over
the RSA exponent size with plain OpenSSL. We have not explored how to do
this with PKCS#11, which would require generating such a key and then
signing a zone with it. Additionally, even with control of the exponent
size with PKCS#11, generating a DNSKEY with this property and signing
such a zone would be slow and undesirable for each test run; instead, we
use a pregenerated DNSKEY and a saved signed zone. These are located in
rsabigexponent/ns2 and currently use RSASHA1 for the DNSKEY
algorithm; however, that may need to be changed in the future.
To generate the DNSKEY used in this test, we used bigkey.c, as
dnssec-keygen is not capable of generating such keys.
Do not remove bigkey.c as it may be needed to generate a new
DNSKEY for testing purposes.
bigkey is used to both test that we are not running under PKCS#11 and
generate a DNSKEY key with a large RSA exponent.
To regenerate ns2/example.db.bad comment out the range test in
opensslrsa_parse before signing the zone with a ZSK key generated
by bigkey.
if (BN_num_bits(e) > RSA_MAX_PUBEXP_BITS) {
DST_RET(ISC_R_RANGE);
}