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Borked since
commit 3ee897d6c2
Author: Lennart Poettering <lennart@poettering.net>
Date: Wed Sep 23 01:00:04 2015 +0200
tree-wide: port more code to use send_one_fd() and receive_one_fd()
because here our fd is not connected and we need to specify
the address.
If we have a precisely matching NSEC RR for a name, we can use its type
bit field to synthesize NODATA cache lookup results for all types not
mentioned in there.
This is useful for mDNS where NSEC RRs are used to indicate missing RRs
for a specific type, but is beneficial in other cases too.
To test this, consider these two lines:
systemd-resolve-host -t NSEC nasa.gov
systemd-resolve-host -t SRV nasa.gov
The second line will not result in traffic as the first line already
cached the NSEC field.
This adds most basic operation for doing DNSSEC validation on the
client side. However, it does not actually add the verification logic to
the resolver. Specifically, this patch only includes:
- Verifying DNSKEY RRs against a DS RRs
- Verifying RRSets against a combination of RRSIG and DNSKEY RRs
- Matching up RRSIG RRs and DNSKEY RRs
- Matching up RR keys and RRSIG RRs
- Calculating the DNSSEC key tag from a DNSKEY RR
All currently used DNSSEC combinations of SHA and RSA are implemented. Support
for MD5 hashing and DSA or EC cyphers are not. MD5 and DSA are probably
obsolete, and shouldn't be added. EC should probably be added
eventually, if it actually is deployed on the Internet.
Now that we have dns_resource_record_to_wire_format() we can generate
the RR serialization we return to bus clients in ResolveRecord() with
it. We pass the RR data along in the original form, not the DNSSEC
canonical form, since that would mean we'd lose RR name casing, which is
however important to keep for DNS-SD services and similar.
This adds dns_resource_record_to_wire_format() that generates the raw
wire-format of a single DnsResourceRecord object, and caches it in the
object, optionally in DNSSEC canonical form. This call is used later to
generate the RR serialization of RRs to verify.
This adds four new fields to DnsResourceRecord objects:
- wire_format points to the buffer with the wire-format version of the
RR
- wire_format_size stores the size of that buffer
- wire_format_rdata_offset specifies the index into the buffer where the
RDATA of the RR begins (i.e. the size of the key part of the RR).
- wire_format_canonical is a boolean that stores whether the cached wire
format is in DNSSEC canonical form or not.
Note that this patch adds a mode where a DnsPacket is allocated on the
stack (instead of on the heap), so that it is cheaper to reuse the
DnsPacket object for generating this wire format. After all we reuse the
DnsPacket object for this, since it comes with all the dynamic memory
management, and serialization calls we need anyway.
When verifying signatures we need to be able to verify the original
data we got for an RR set, and that means we cannot simply drop flags
bits or consider RRs invalid too eagerly. Hence, instead of parsing the
DNSKEY flags store them as-is. Similar, accept the protocol field as it
is, and don't consider it a parsing error if it is not 3.
Of course, this means that the DNSKEY handling code later on needs to
check explicit for protocol != 3.
We need to check the same thing in multiple tests. Use a shared
macro to make it easier to update the list of errnos.
Change the errno code for "unitialized cgroup fs" for ENOMEDIUM.
Exec format error looks like something more serious.
This fixes test-execute invocation in mock.
When masking is used to prevent a unit from being loaded,
every transaction with dependent units would generate a warning.
Downgrade this warning to debug level.
transaction_add_job_and_dependencies only generated a few return
values found in the table in bus_common_errors.c, and EADDRNOTAVAIL
is not one of them, so do not try to suppress EADDRNOTAVAIL.
https://bugzilla.redhat.com/show_bug.cgi?id=1278264
Let's merge access_init() and mac_selinux_access_init(), and only call
mac_selinux_use() once, inside the merged function, instead of multiple
times, including in the caller.
See comments on:
https://github.com/systemd/systemd/pull/2053
Make sure dns_name_normalize(), dns_name_concat(), dns_name_is_valid()
do not accept/generate invalidly long hostnames, i.e. longer than 253
characters.
Labels of zero length are not OK, refuse them early on. The concept of a
"zero-length label" doesn't exist, a zero-length full domain name
however does (representing the root domain). See RFC 2181, Section 11.
This way, directories created later for containers or for
journald-remote, will be readable by adm & wheel groups by default,
similarly to /var/log/journal/%m itself.
https://github.com/systemd/systemd/issues/1971
