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2016-01-17resolved: update DNSSEC TODOLennart Poettering
2016-01-17resolved: try to reduce number or DnsResourceKeys we keep around by merging themLennart Poettering
Quite often we read the same RR key multiple times from the same message. Try to replace them by a single object when we notice this. Do so again when we add things to the cache. This should reduce memory consumption a tiny bit.
2016-01-17resolved: when switching between DNSSEC modes, possibly flush cachesLennart Poettering
If the networkd configuration changes during runtime, make sure to flush all caches when we switch from a less trusted to a more trusted mode.
2016-01-17resolved: when the server feature level changes between query and response ↵Lennart Poettering
restart transaction In some cases we learn something about a server's feature level through its responses. If we notice that after doing basic checking of a response, and after collecting all auxiliary DNSSEC info the feature level of the server is lower than where we started, restart the whole transaction. This is useful to deal with servers that response rubbish when talked to with too high feature levels.
2016-01-17resolved: check OPT RR before accepting a reply for verification of server ↵Lennart Poettering
feature level Let's make sure we first check if the OPT was lost in the reply, before we accept a reply as successful and use it for verifying the current feature level.
2016-01-17resolved: when restarting a DNS transaction, remove all auxiliary DNSSEC ↵Lennart Poettering
transactions When we restart a DNS transaction, remove all connections to any auxiliary DNSSEC transactions, after all we might acquire completely different data this time, requiring different auxiliary DNSSEC transactions.
2016-01-17resolved: when we receive an reply which is OPT-less or RRSIG-less, ↵Lennart Poettering
downgrade what we verified If we receive a reply that lacks the OPT RR, then this is reason to downgrade what was verified before, as it's apparently no longer true, and the previous OPT RR we saw was only superficially OK. Similar, if we realize that RRSIGs are not augmented, then also downgrade the feature level that was verified, as DNSSEC is after all not supported. This check is in particular necessary, as we might notice the fact that RRSIG is not augmented only very late, when verifying the root domain. Also, when verifying a successful response, actually take in consideration that it might have been reported already that RRSIG or OPT are missing in the response.
2016-01-17resolved: downgrade server feature level more aggressively when we have ↵Lennart Poettering
reason to This adds logic to downgrade the feature level more aggressively when we have reason to. Specifically: - When we get a response packet that lacks an OPT RR for a query that had it. If so, downgrade immediately to UDP mode, i.e. don't generate EDNS0 packets anymore. - When we get a response which we are sure should be signed, but lacks RRSIG RRs, we downgrade to EDNS0 mode, i.e. below DO mode, since DO is apparently not really supported. This should increase compatibility with servers that generate non-sensical responses if they messages with OPT RRs and suchlike, for example the situation described here: https://open.nlnetlabs.nl/pipermail/dnssec-trigger/2014-November/000376.html This also changes the downgrade code to explain in a debug log message why a specific downgrade happened.
2016-01-17resolved: ignore invalid OPT RRs in incoming packetsLennart Poettering
This validates OPT RRs more rigorously, before honouring them: if we any of the following condition holds, we'll ignore them: a) Multiple OPT RRs in the same message b) OPT RR not owned by the root domain c) OPT RR in the wrong section (Belkin routers do this) d) OPT RR contain rfc6975 algorithm data (Belkin routers do this) e) OPT version is not 0 f) OPT payload doesn't add up with the lengths Note that d) may be an indication that the server just blindly copied OPT data from the response into the reply. RFC6975 data is only supposed to be included in queries, and we do so. It's not supposed to be included in responses (and the RFC is very clear on that). Hence if we get it back in a reply, then the server probably just copied the OPT RR.
2016-01-17resolved: update RFCs list and TODO listLennart Poettering
2016-01-17resolved: add complex test caseLennart Poettering
This new test case tries to resolve a couple of known domains, to verify the validation results. It talks to resolved via the bus, thus comprehensively testing the whole shebang. Of course, it requires network connectivity and a DNSSEC capable DNS server, hence this is a manual test.
2016-01-17resolved: complete NSEC non-existance proofsLennart Poettering
This fills in the last few gaps: - When checking if a domain is non-existing, also check that no wildcard for it exists - Ensure we don't base "covering" tests on NSEC RRs from a parent zone - Refuse to accept expanded wildcard NSEC RRs for absence proofs.
2016-01-17resolved: make sure the NSEC proof-of-non-existance check also looks for ↵Lennart Poettering
wildcard domains
2016-01-17resolved: on negative NODATA replies, properly deal with empty non-terminalsLennart Poettering
empty non-terminals generally lack NSEC RRs, which means we can deduce their existance only from the fact that there are other RRs that contain them in their suffix. Specifically, the NSEC proof for NODATA on ENTs works by sending the NSEC whose next name is a suffix of the queried name to the client. Use this information properly.
2016-01-17resolved: rename dnssec_verify_dnskey() → dnssec_verify_dnskey_by_ds()Lennart Poettering
This should clarify that this is not regular signature-based validation, but validation through DS RR fingerprints.
2016-01-17resolved: be stricter when using NSEC3Lennart Poettering
We can user signer and synthesizing source information to check that the NSEC3 RRs we want to use are actually reasonable and properly signed.
2016-01-17resolved: when validating an RRset, store information about the synthesizing ↵Lennart Poettering
source and zone in each RR Having this information available is useful when we need to check whether various RRs are suitable for proofs. This information is stored in the RRs as number of labels to skip from the beginning of the owner name to reach the synthesizing source/signer. Simple accessor calls are then added to retrieve the signer/source from the RR using this information. This also moves validation of a a number of RRSIG parameters into a new call dnssec_rrsig_prepare() that as side-effect initializes the two numeric values.
2016-01-17resolved: do not use NSEC RRs from the wrong zone for proofsLennart Poettering
When proving NODATA DS lookups we need to insist on looking at the parent zone's NSEC RR, not the child zone's. When proving any other NODATA lookups we need to insist on looking at the child zone's NSEC RR, not the parent's.
2016-01-17resolved: ignore DS RRs without generating an error if they use an ↵Lennart Poettering
unsupported digest algorithm
2016-01-17resolved: some RR types may appear only or not at all in a zone apexLennart Poettering
Add extra checks when validating with RRSIGs. This follows recommendations from: http://www.george-barwood.pwp.blueyonder.co.uk/DnsServer/NotesOnDNSSSEC.htm
2016-01-17Update TODOLennart Poettering
2016-01-17Merge pull request #2340 from evverx/fix-memory-leak-on-enable-disable-etcDaniel Mack
core: fix memory leak on set-default, enable, disable etc
2016-01-17core: fix memory leak on set-default, enable, disable etcEvgeny Vereshchagin
Fixes: ==1== by 0x23E44C: remove_marked_symlinks_fd (install.c:453) ==1== by 0x23E256: remove_marked_symlinks_fd (install.c:405) ==1== by 0x23E630: remove_marked_symlinks (install.c:494) ==1== by 0x2427A0: unit_file_disable (install.c:1876) ==1== by 0x18A633: method_disable_unit_files_generic (dbus-manager.c:1760) ==1== by 0x18A6CA: method_disable_unit_files (dbus-manager.c:1768) ==1== by 0x1D8146: method_callbacks_run (bus-objects.c:420) ==1== by 0x1DA9D8: object_find_and_run (bus-objects.c:1257) ==1== by 0x1DB01A: bus_process_object (bus-objects.c:1373) ==1== ==1== 228 (48 direct, 180 indirect) bytes in 2 blocks are definitely lost in loss record 8 of 14 ==1== at 0x4C2BBCF: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==1== by 0x4C2DE2F: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==1== by 0x23DA60: unit_file_changes_add (install.c:233) ==1== by 0x23DDB2: create_symlink (install.c:298) ==1== by 0x240C5C: install_info_symlink_wants (install.c:1328) ==1== by 0x240FC8: install_info_apply (install.c:1384) ==1== by 0x241211: install_context_apply (install.c:1439) ==1== by 0x242563: unit_file_enable (install.c:1830) ==1== by 0x18A06E: method_enable_unit_files_generic (dbus-manager.c:1650) ==1== by 0x18A141: method_enable_unit_files (dbus-manager.c:1660) ==1== by 0x1D8146: method_callbacks_run (bus-objects.c:420) ==1== by 0x1DA9D8: object_find_and_run (bus-objects.c:1257) ==1== ==1== 467 (144 direct, 323 indirect) bytes in 3 blocks are definitely lost in loss record 9 of 14 ==1== at 0x4C2DD9F: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==1== by 0x23DA60: unit_file_changes_add (install.c:233) ==1== by 0x23DE97: create_symlink (install.c:320) ==1== by 0x242CFC: unit_file_set_default (install.c:1951) ==1== by 0x18A881: method_set_default_target (dbus-manager.c:1802) ==1== by 0x1D8146: method_callbacks_run (bus-objects.c:420) ==1== by 0x1DA9D8: object_find_and_run (bus-objects.c:1257) ==1== by 0x1DB01A: bus_process_object (bus-objects.c:1373) ==1== by 0x259143: process_message (sd-bus.c:2567) ==1== by 0x259326: process_running (sd-bus.c:2609) ==1== by 0x259BDC: bus_process_internal (sd-bus.c:2798) ==1== by 0x259CAD: sd_bus_process (sd-bus.c:2817) ==1== ==1== LEAK SUMMARY: ==1== definitely lost: 216 bytes in 6 blocks ==1== indirectly lost: 560 bytes in 14 blocks ==1== possibly lost: 0 bytes in 0 blocks ==1== still reachable: 65,536 bytes in 5 blocks ==1== suppressed: 0 bytes in 0 blocks ==1== Reachable blocks (those to which a pointer was found) are not shown. ==1== To see them, rerun with: --leak-check=full --show-leak-kinds=all ==1==
2016-01-15Merge pull request #2334 from jwilk/spellingDaniel Mack
man: fix typos
2016-01-15man: fix typosJakub Wilk
2016-01-15Merge pull request #2328 from evverx/fix-transient-units-memeory-leakDaniel Mack
Fix transient units memory leak
2016-01-15tests: add function for valgrind wrapper creationEvgeny Vereshchagin
I used it for d9814c7 and bffd87b
2016-01-15core: fix memory leak in transient unitsEvgeny Vereshchagin
Fixes: ==1== HEAP SUMMARY: ==1== in use at exit: 67,182 bytes in 91 blocks ==1== total heap usage: 70,485 allocs, 70,394 frees, 42,184,635 bytes allocated ==1== ==1== 5,742 (696 direct, 5,046 indirect) bytes in 29 blocks are definitely lost in loss record 4 of 7 ==1== at 0x4C2DD9F: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==1== by 0x21ADDD: realloc_multiply (alloc-util.h:67) ==1== by 0x21BFB0: strv_push (strv.c:448) ==1== by 0x21C245: strv_consume (strv.c:520) ==1== by 0x21C33C: strv_extend (strv.c:559) ==1== by 0x278AD7: unit_write_drop_in (unit.c:3352) ==1== by 0x278EEB: unit_write_drop_in_private (unit.c:3403) ==1== by 0x190C21: bus_service_set_transient_property (dbus-service.c:254) ==1== by 0x190DBC: bus_service_set_property (dbus-service.c:284) ==1== by 0x18F00E: bus_unit_set_properties (dbus-unit.c:1226) ==1== by 0x186F6A: transient_unit_from_message (dbus-manager.c:683) ==1== by 0x1872B7: method_start_transient_unit (dbus-manager.c:763) ==1== ==1== LEAK SUMMARY: ==1== definitely lost: 696 bytes in 29 blocks ==1== indirectly lost: 5,046 bytes in 58 blocks ==1== possibly lost: 0 bytes in 0 blocks ==1== still reachable: 61,440 bytes in 4 blocks ==1== suppressed: 0 bytes in 0 blocks
2016-01-14Merge pull request #2322 from fbuihuu/downgrade-warn-for-not-found-unitZbigniew Jędrzejewski-Szmek
transaction: downgrade warnings about wanted units which are not found
2016-01-14Merge pull request #2316 from poettering/dnssec14Tom Gundersen
Fourteenth DNSSEC PR
2016-01-14Merge pull request #2319 from walyong/log_msg_v04Lennart Poettering
[v4] bus-util: print "systemctl --user" on user service manager
2016-01-14transaction: downgrade warnings about wanted unit which are not foundFranck Bui
If a unit was pulled by a Wants= dependency but its unit file was not present then we logged this as an error. However Wants= might be used to configure a soft/optional dependency on another unit, ie. start an optional service only if it's installed otherwise simply skip it. In this case emitting an error doesn't look appropriate. But it's still an error if the optional dependency exists but its activation fails for any reasons.
2016-01-14Merge pull request #2320 from evverx/fix-memory-leak-on-reloadDaniel Mack
Fix memory leak on daemon-reload
2016-01-14tests: add function for valgrind installationEvgeny Vereshchagin
I used it for d9814c76ec35e53a6b6448c0 Very handy:)
2016-01-14core: fix memory leak on reloadEvgeny Vereshchagin
==1== HEAP SUMMARY: ==1== in use at exit: 61,728 bytes in 22 blocks ==1== total heap usage: 258,122 allocs, 258,100 frees, 78,219,628 bytes allocated ==1== ==1== 16 bytes in 1 blocks are definitely lost in loss record 1 of 6 ==1== at 0x4C2BBCF: malloc (vg_replace_malloc.c:299) ==1== by 0x1E350E: memdup (alloc-util.c:34) ==1== by 0x135AFB: memdup_multiply (alloc-util.h:74) ==1== by 0x140F97: manager_set_default_rlimits (manager.c:2929) ==1== by 0x1303DA: manager_set_defaults (main.c:737) ==1== by 0x133A02: main (main.c:1718) ==1== ==1== 272 bytes in 17 blocks are definitely lost in loss record 2 of 6 ==1== at 0x4C2BBCF: malloc (vg_replace_malloc.c:299) ==1== by 0x1E350E: memdup (alloc-util.c:34) ==1== by 0x135AFB: memdup_multiply (alloc-util.h:74) ==1== by 0x140F97: manager_set_default_rlimits (manager.c:2929) ==1== by 0x1303DA: manager_set_defaults (main.c:737) ==1== by 0x13480D: main (main.c:1828) ==1== ==1== LEAK SUMMARY: ==1== definitely lost: 288 bytes in 18 blocks ==1== indirectly lost: 0 bytes in 0 blocks ==1== possibly lost: 0 bytes in 0 blocks ==1== still reachable: 61,440 bytes in 4 blocks ==1== suppressed: 0 bytes in 0 blocks ==1== Reachable blocks (those to which a pointer was found) are not shown. ==1== To see them, rerun with: --leak-check=full --show-leak-kinds=all
2016-01-14bus-util: print "systemctl --user" on user service managerWaLyong Cho
When a unit was started with "systemctl --user" and it failed, error messages is printed as "systemctl status". But it should be "systemctl --user status".
2016-01-14Merge pull request #2317 from evverx/rm-mtabDaniel Mack
README, tests: remove /etc/mtab
2016-01-14README, tests: remove /etc/mtabEvgeny Vereshchagin
This is a followup for 1d40ddb
2016-01-13shared: reuse dns_label_unescape_undo_idna() in more placesLennart Poettering
We frequently unescape DNS label follwed by IDNA undoing. We now have a function that does that in one step, hence use it everywhere.
2016-01-13shared: simplify string concatenation with strjoin()Lennart Poettering
2016-01-13shared: port dns_name_compare_func() to make use of ascii_strcasecmp_nn()Lennart Poettering
This way we become compatible with DNS names with embedded NUL bytes.
2016-01-13shared: simplify dns_name_is_single_label() by using dns_name_parent() to ↵Lennart Poettering
skip first label
2016-01-13basic: add ascii_strcasecmp_nn() callLennart Poettering
In contrast to ascii_strcasecmp_nn() it takes two character buffers with their individual length. It will then compare the buffers up the smaller size of the two buffers, and finally the length themselves.
2016-01-13shared: replace a few invocations of strcasecmp() for DNS labels with ↵Lennart Poettering
ascii_strcasecmp_n() This makes our code compatible with embedded NUL bytes, as we don't care about NUL bytes anymore.
2016-01-13resolved: implement the full NSEC and NSEC3 postive wildcard proofsLennart Poettering
2016-01-13resolved: refuse validating wildcard RRs for SOA, NSEC3, DNAMELennart Poettering
2016-01-13resolved: properly handles RRs in domains beginning in an asterisk labelLennart Poettering
Properly handle RRs that begin with an asterisk label. These are the unexpanded forms of wildcard domains and appear in NSEC RRs for example. We need to make sure we handle the signatures of these RRs properly, since they mostly are considered normal RRs, except that the RRSIG labels counter is one off for them, as the asterisk label is always excluded of the signature.
2016-01-13resolved: optimize dnssec_verify_rrset() a bitLennart Poettering
Let's determine the source of synthesis once instead of for each RR in the RRset.
2016-01-13shared: add new dns_name_startswith() callLennart Poettering
dns_name_startswith() is to dns_name_endswith() as startswith() is to endswith().
2016-01-13basic: add new ascii_strcasecmp_n() callLennart Poettering
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