wrong filename looked when reading key files
Summary
When bind9 tools read a zone file with DNSKEY records, for which no .key file is provided but .private exists, a misleading error message is generated. For example:
$ dnssec-signzone 168.192.in-addr.arpa
dnssec-signzone: warning: dns_dnssec_keylistfromrdataset: error reading ./K168.192.in-addr.arpa.+007+13293.private: file not found
$ ls -l ./K168.192.in-addr.arpa.+007+13293.*
-rw------- 1 root root 1707 Oct 28 2011 ./K168.192.in-addr.arpa.+007+13293.private
So, it reports an existing file as "not found", while actually (according to strace) it looked for a .key file (which indeed does not exist, since it is inlined in the zone itself).
The end result is that this key is not processed at all, despite the tool has all the information, - the .key file contents is in the zone already (that's where dnssec-signzone found the +007+13293
part, so it does have the DNSKEY record and don't actually need the .key file), and the .private file which it reported as missing (while not even trying to open it), is actually exists.
BIND version affected
BIND 9.18.24-1-Debian (Extended Support Version) <id:>
running on Linux x86_64 6.1.0-18-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.76-1 (2024-02-01)
built by make with '--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-option-checking' '--disable-silent-rules' '--libdir=${prefix}/lib/x86_64-linux-gnu' '--runstatedir=/run' '--disable-maintainer-mode' '--disable-dependency-tracking' '--libdir=/usr/lib/x86_64-linux-gnu' '--sysconfdir=/etc/bind' '--with-python=python3' '--localstatedir=/' '--enable-threads' '--enable-largefile' '--with-libtool' '--enable-shared' '--disable-static' '--with-gost=no' '--with-openssl=/usr' '--with-gssapi=yes' '--with-libidn2' '--with-json-c' '--with-lmdb=/usr' '--with-gnu-ld' '--with-maxminddb' '--with-atf=no' '--enable-ipv6' '--enable-rrl' '--enable-filter-aaaa' '--disable-native-pkcs11' '--enable-dnstap' 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -ffile-prefix-map=/build/reproducible-path/bind9-9.18.24=. -fstack-protector-strong -Wformat -Werror=format-security -fno-strict-aliasing -fno-delete-null-pointer-checks -DNO_VERSION_DATE -DDIG_SIGCHASE' 'LDFLAGS=-Wl,-z,relro -Wl,-z,now' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2'
compiled by GCC 12.2.0
compiled with OpenSSL version: OpenSSL 3.0.11 19 Sep 2023
linked to OpenSSL version: OpenSSL 3.0.11 19 Sep 2023
compiled with libuv version: 1.44.2
linked to libuv version: 1.44.2
compiled with libnghttp2 version: 1.52.0
linked to libnghttp2 version: 1.52.0
compiled with libxml2 version: 2.9.14
linked to libxml2 version: 20914
compiled with json-c version: 0.16
linked to json-c version: 0.16
compiled with zlib version: 1.2.13
linked to zlib version: 1.2.13
linked to maxminddb version: 1.7.1
compiled with protobuf-c version: 1.4.1
linked to protobuf-c version: 1.4.1
threads support is enabled
DNSSEC algorithms: RSASHA1 NSEC3RSASHA1 RSASHA256 RSASHA512 ECDSAP256SHA256 ECDSAP384SHA384 ED25519 ED448
DS algorithms: SHA-1 SHA-256 SHA-384
HMAC algorithms: HMAC-MD5 HMAC-SHA1 HMAC-SHA224 HMAC-SHA256 HMAC-SHA384 HMAC-SHA512
TKEY mode 2 support (Diffie-Hellman): yes
TKEY mode 3 support (GSS-API): yes
default paths:
named configuration: /etc/bind/named.conf
rndc configuration: /etc/bind/rndc.conf
DNSSEC root key: /etc/bind/bind.keys
nsupdate session key: //run/named/session.key
named PID file: //run/named/named.pid
named lock file: //run/named/named.lock
geoip-directory: /usr/share/GeoIP