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2015-12-03resolved: add a concept of "authenticated" responsesLennart Poettering
This adds a new SD_RESOLVED_AUTHENTICATED flag for responses we return on the bus. When set, then the data has been authenticated. For now this mostly reflects the DNSSEC AD bit, if DNSSEC=trust is set. As soon as the client-side validation is complete it will be hooked up to this flag too. We also set this bit whenver we generated the data ourselves, for example, because it originates in our local LLMNR zone, or from the built-in trust anchor database. The "systemd-resolve-host" tool has been updated to show the flag state for the data it shows.
2015-12-03resolved: when synthesizing NODATA from cached NSEC bitmaps, honour CNAME/DNAMELennart Poettering
When an RR type is not set in an NSEC, then the CNAME/DNAME types might still be, hence check them too. Otherwise we might end up refusing resolving of CNAME'd RRs if we cached an NSEC before.
2015-12-03resolved: maintain a short TODO list for DNSSEC support in the dnssec C ↵Lennart Poettering
files for now
2015-12-03resolved: introduce a dnssec_mode setting per scopeLennart Poettering
The setting controls which kind of DNSSEC validation is done: none at all, trusting the AD bit, or client-side validation. For now, no validation is implemented, hence the setting doesn't do much yet, except of toggling the CD bit in the generated messages if full client-side validation is requested.
2015-12-03resolved: add a limit on the max DNSSEC RRSIG expiry skew we allowLennart Poettering
2015-12-03resolved: add a simple trust anchor database as additional RR sourceLennart Poettering
When doing DNSSEC lookups we need to know one or more DS or DNSKEY RRs as trust anchors to validate lookups. With this change we add a compiled-in trust anchor database, serving the root DS key as of today, retrieved from: https://data.iana.org/root-anchors/root-anchors.xml The interface is kept generic, so that additional DS or DNSKEY RRs may be served via the same interface, for example by provisioning them locally in external files to support "islands" of security. The trust anchor database becomes the fourth source of RRs we maintain, besides, the network, the local cache, and the local zone.
2015-12-03resolved: rework how we allow allow queries to be dispatched to scopesLennart Poettering
Previously, we'd never do any single-label or root domain lookups via DNS, thus leaving single-label lookups to LLMNR and the search path logic in order that single-label names don't leak too easily onto the internet. With this change we open things up a bit, and only prohibit A/AAAA lookups of single-label/root domains, but allow all other lookups. This should provide similar protection, but allow us to resolve DNSKEY+DS RRs for the top-level and root domains. (This also simplifies handling of the search domain detection, and gets rid of dns_scope_has_search_domains() in favour of dns_scope_get_search_domains()).
2015-12-03resolved: don't bother with picking a search domain when searching is disabledLennart Poettering
2015-12-03resolved: optionally, allocate DnsResourceKey objects on the stackLennart Poettering
Sometimes when looking up entries in hashmaps indexed by a DnsResourceKey it is helpful not having to allocate a full DnsResourceKey dynamically just to use it as search key. Instead, optionally allow allocation of a DnsResourceKey on the stack. Resource keys allocated like that of course are subject to other lifetime cycles than the usual Resource keys, hence initialize the reference counter to to (unsigned) -1. While we are at it, remove the prototype for dns_resource_key_new_dname() which was never implemented.
2015-12-03resolved: make expiration error recognizableLennart Poettering
2015-12-03resolved: refuse resolving of a number of domains listed in RFC6303Lennart Poettering
We already blacklisted a few domains, add more.
2015-12-03Merge pull request #1934 from martinpitt/masterTom Gundersen
tests: add networkd integration test
2015-12-03Merge pull request #2089 from keszybz/journal-fixes-2Tom Gundersen
Journal fixes
2015-12-03journal: silently skip failing large messages if journald is missingZbigniew Jędrzejewski-Szmek
We treated -ENOENT errors with silent failure, for small messages. Do the same for large messages.
2015-12-03journal: unbreak sd_journal_sendvZbigniew Jędrzejewski-Szmek
Borked since commit 3ee897d6c2401effbc82f5eef35fce405781d6c8 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.
2015-12-03test-journal-send: add tests for sendvZbigniew Jędrzejewski-Szmek
Also, check the return value of all calls. They are documented to return 0, even if journald is not listening.
2015-12-03journal: addition and multiplication do not commuteZbigniew Jędrzejewski-Szmek
2015-12-02test-journal-send: no need to set log levelZbigniew Jędrzejewski-Szmek
We only use the public api here, so don't include log.h.
2015-12-03Merge pull request #2087 from poettering/dnssecTom Gundersen
Basic DNSSEC support, and unrelated fixes
2015-12-03resolved: support the RSASHA1_NSEC3_SHA1 pseudo-algorithmLennart Poettering
RSASHA1_NSEC3_SHA1 is an alias for RSASHA1, used to do NSEC3 feature negotiation. While verifying RRsets there's no difference, hence support it here.
2015-12-03resolved: synthesize NODATA cache results when we find matching NSEC RRsLennart Poettering
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.
2015-12-03resolved: move algorithm/digest definitions into resolved-dns-rr.hLennart Poettering
After all, they are for flags and parameters of RRs and already relevant when dealing with RRs outside of the serialization concept.
2015-12-03resolved: don't accept expired RRSIGsLennart Poettering
2015-12-02resolved: add basic DNSSEC supportLennart Poettering
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.
2015-12-02resolved: port ResolveRecord() bus call implementation to ↵Lennart Poettering
dns_resource_record_to_wire_format() 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.
2015-12-02resolved: add code to generate the wire format for a single RRLennart Poettering
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.
2015-12-02resolved: add code to map DNSSEC digest types to strings and backLennart Poettering
2015-12-02resolved: store DNSKEY fields flags+protocol as-isLennart Poettering
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.
2015-12-02resolved: add RFC 5702 defined DNSSEC algorithms to tableLennart Poettering
2015-12-02util-lib: update dns_name_to_wire_format() to optionally generate DNSSEC ↵Lennart Poettering
canonical names We'll need this later when putting together RR serializations to checksum.
2015-12-02resolved: make sure DNS_ANSWER_FOREACH() can be nestedLennart Poettering
Change the iterator counter so that a different varable is used for each invocation of the macro, so that it may be nested.
2015-12-02resolved: simplify dns_packet_append_string()Lennart Poettering
It essentially does the same as dns_packet_append_raw_string(), hence make it a wrapper around it.
2015-12-02hostnamed: SMBIOS 3.0 knows the "tablet" form factor, add support for itLennart Poettering
2015-12-02Merge pull request #2073 from poettering/dns-label-fixesLennart Poettering
Dns label fixes + unrelated selinux clean-up
2015-12-02Merge pull request #2084 from keszybz/ppc64-fixes-2Lennart Poettering
Test fixes to run in ppc64 mock
2015-12-02lz4: fix size check which had no chance of working on big-endianZbigniew Jędrzejewski-Szmek
2015-12-02tests: fix newlines in skip messageZbigniew Jędrzejewski-Szmek
2015-12-02tests: turn check if manager cannot be intialized into macroZbigniew Jędrzejewski-Szmek
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.
2015-12-01basic/virt: add missing includes to compile on ppc64Zbigniew Jędrzejewski-Szmek
2015-12-02Merge pull request #2082 from phomes/basic-sort-includesTom Gundersen
basic: re-sort includes
2015-12-01basic: re-sort includesThomas Hindoe Paaboel Andersen
My previous patch to only include what we use accidentially placed the added inlcudes in non-sorted order.
2015-12-01Merge pull request #2074 from keszybz/test-acl-util-fixTom Gundersen
test-acl-util: fix two issues from review
2015-12-01Merge pull request #2075 from phomes/includes-cleanup-basicTom Gundersen
basic: include only what we use
2015-11-30basic: include only what we useThomas Hindoe Paaboel Andersen
This is a cleaned up result of running iwyu but without forward declarations on src/basic.
2015-11-30test-acl-util: fix two issues from reviewZbigniew Jędrzejewski-Szmek
https://github.com/systemd/systemd/pull/2063
2015-11-30core: simplify selinux AVC initializationLennart Poettering
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
2015-11-30dns-domain: change error codes when dealing with too short buffers to ENOBUFSLennart Poettering
Some calls used ENOBUFS to indicate too-short result buffers, others used ENOSPC. Let's unify this on ENOBUFS.
2015-11-30dns-domain: check resulting domain name length in dns_name_to_wire_format()Lennart Poettering
Let's better be safe than sorry.
2015-11-30dns-domain: make sure dns_name_to_wire_format() may properly encode the root ↵Lennart Poettering
domain The root domain consists of zero labels, and we should be able to encode that.
2015-11-30dns-domain: don't accept overly long hostnamesLennart Poettering
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.