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Description of problem: dns.name.Name 's to_unicode() method has a bug. It escapes special characters to wrong way. In DNS the email address admin.1@example.com is encoded as admin\.1.example.com. The to_unicode() method drops the quoting and turns the email address into admin@1.example.com (encoded admin.1.example.com). The issue causes problems with IdM and breaks ipa dnszone-show command. Version-Release number of selected component (if applicable): python3-dns-1.15.0 How reproducible: always Steps to Reproduce: $ python3 >>> import dns.name >>> name = dns.name.from_text("admin\\.1.example.com") >>> name <DNS name admin\.1.example.com.> >>> name.to_text() 'admin\\.1.example.com.' >>> name.to_unicode() 'admin.1.example.com.' Actual results: name.to_unicode() returns 'admin.1.example.com.' Expected results: 'admin\\.1.example.com.' Additional info: Upstream fix https://github.com/rthalley/dnspython/commit/c76aa6ac9969447220c8e807aa1e5640a6c12924
The fix has been in upstream master for a while. Upstream has retired 1.x release series in favor of 2.0 with Python 3-only support. It may be necessary to backport the fix to 1.5 manually and maintain a patch.
I am going to take a look. We have the reproducer available so it should be easy to test the fix and I am going to backport.
I've managed to backport the upstream patch to version 1.15 (RHEL8). Scratch build: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=23218020 Commit (my fork, rhel-8.1.é branch): https://src.osci.redhat.com/fork/lbalhar/rpms/python-dns/commits/rhel-8.1.0 Verification Old version: # rpm -qi python3-dns Name : python3-dns Version : 1.15.0 Release : 8.el8 # python3 Python 3.6.8 (default, Aug 6 2019, 19:43:07) [GCC 8.3.1 20190507 (Red Hat 8.3.1-4)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import dns.name >>> name = dns.name.from_text("admin\\.1.example.com") >>> name <DNS name admin\.1.example.com.> >>> name.to_text() 'admin\\.1.example.com.' >>> name.to_unicode() 'admin.1.example.com.' New version: # rpm -qi python3-dns Name : python3-dns Version : 1.15.0 Release : 9.el8 # python3 Python 3.6.8 (default, Aug 6 2019, 19:43:07) [GCC 8.3.1 20190507 (Red Hat 8.3.1-4)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import dns.name >>> name = dns.name.from_text("admin\\.1.example.com") >>> name <DNS name admin\.1.example.com.> >>> name.to_text() 'admin\\.1.example.com.' >>> name.to_unicode() 'admin\\.1.example.com.' Everything is ready and tested on RHEL 8.1 so the fix has to wait until there will be a branch for RHEL 8.2. But it's already ready for a review. The backported patch also contains one new test for to_unicode() method and a lot of existing tests are already there so I think that no new tests are needed from QA.
Pull request is ready for review here: https://src.osci.redhat.com/rpms/python-dns/pull-request/2 The test is also backported in `tests/test_name.py` function `testToText12`.
PR merged. Build: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=24188082
Before I'll be able to add the build to the errata, I need to enable gating. Gating configuration PR: https://src.osci.redhat.com/rpms/python-dns/pull-request/3 Beaker test configuration change and prove that it works well for this bug: https://src.osci.redhat.com/tests/python-dns/pull-request/1 Could you please help me to enable gating for this component?
Lumir, please also provide the command to start only the relevant upstream test that fixes the issue, so that QE can make a Regression test case for it.
Both PRs from comment#8 merged, release bumped. New build (for gating): https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=24238288 Command to run the backported test: python3 -m unittest -v tests.test_name.NameTestCase.testToText12
Beaker run successful. https://beaker.engineering.redhat.com/tasks/executed?recipe_task_id=102528691&recipe_task_id=102528684&recipe_task_id=102528742&recipe_task_id=102528701&recipe_task_id=102528718&recipe_task_id=102528708&recipe_task_id=102528735&recipe_task_id=102528725&old_pkg_tasks=102528701,102528735,102528684,102528718&new_pkg_tasks=102528708,102528691,102528742,102528725
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:1789