[fix] Prevent renewing revoked X.509 certificates #1467 by krrishnaik · Pull Request #1488 · openwisp/openwisp-controller

krrishnaik · 2026-09-15T14:51:41Z

Checklist

I have read the OpenWISP Contributing Guidelines and OpenWISP Anti AI Spam Policy.
I have manually tested the changes proposed in this pull request.
I have written new test cases for new code and/or updated existing tests for changes to existing code.
I have updated the documentation.

Reference to Existing Issue

Closes #1467.

Description of Changes

Prevent revoked X.509 certificates from being renewed.

The certificate model now rejects renewal when the certificate is already revoked. The PKI API converts this validation error into a 400 response.

Regression coverage verifies that:

renewing a revoked certificate is rejected;
the original certificate serial number remains unchanged;
the certificate remains revoked;
the original serial number remains present in the CA CRL;
normal certificate renewal continues to work.

Screenshot

N/A

coderabbitai · 2026-09-15T14:51:49Z

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docs/user/rest-api.rst
openwisp_controller/pki/base/models.py
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GitHub Check: auto-assign-issue / run-bot
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📓 Path-based instructions (4)

Verify that documentation remains consistent with the implemented behavior and does not reference deprecated or removed functionality.

⚙️ CodeRabbit configuration file

Files:

docs/user/rest-api.rst

Ensure tests cover relevant success, error, boundary, and unusual input scenarios.

⚙️ CodeRabbit configuration file

Files:

openwisp_controller/pki/tests/test_api.py
openwisp_controller/pki/tests/test_models.py

Flag potential security vulnerabilities Flag obvious performance regressions, such as heavy loops, repeated I/O, or unoptimized queries Flag unused or redundant code Flag outdated or incorrect comments/docstrings Ensure new code handles err...

⚙️ CodeRabbit configuration file

Files:

docs/user/rest-api.rst
openwisp_controller/pki/tests/test_api.py
openwisp_controller/pki/tests/test_models.py
openwisp_controller/pki/base/models.py

Update docs when behavior, settings, public APIs, setup steps, or supported versions change, including when a documented feature's behavior changes or a new user-facing feature is added.

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🧠 Learnings (5)

📚 Learning: 2026-02-17T19:13:10.088Z

Learnt from: nemesifier
Repo: openwisp/openwisp-controller PR: 1175
File: openwisp_controller/config/whois/commands.py:0-0
Timestamp: 2026-02-17T19:13:10.088Z
Learning: In reviews for the openwisp/openwisp-controller repository, do not propose changes based on Ruff warnings. The project does not use Ruff as its linter; ignore Ruff-related suggestions and follow the repository’s established linting and configuration rules. This guidance applies to all Python files under the openwisp_controller directory.

Applied to files:

openwisp_controller/pki/tests/test_api.py
openwisp_controller/pki/tests/test_models.py

📚 Learning: 2026-08-13T23:06:07.320Z

Learnt from: nemesifier
Repo: openwisp/openwisp-controller PR: 1456
File: openwisp_controller/pki/admin.py:65-68
Timestamp: 2026-08-13T23:06:07.320Z
Learning: For disabled organizations in openwisp_controller, allow certificate revocation as a cleanup operation in both the Django admin CertAdmin.revoke_action and REST API CertRevokeView, while preserving all authorization checks. Do not allow CA or certificate renewal for disabled organizations. Tests must verify that a revoked certificate is included in the CA certificate revocation list (CRL).

Applied to files:

openwisp_controller/pki/tests/test_api.py

📚 Learning: 2026-06-07T12:07:08.468Z

Learnt from: stktyagi
Repo: openwisp/openwisp-controller PR: 1378
File: openwisp_controller/config/tests/test_admin.py:2335-2335
Timestamp: 2026-06-07T12:07:08.468Z
Learning: In this project’s Python test suite (files under openwisp_controller/**/tests/), don’t require or request prose/inline comments that document the breakdown of query-count changes (e.g., assertions around template/DB query counts in helpers like _verify_template_queries). Treat query-count assertions as volatile implementation details that change frequently; review should focus on whether the test asserts the expected behavior, not on explaining the specific query-count deltas in comments.

Applied to files:

openwisp_controller/pki/tests/test_api.py

📚 Learning: 2026-06-07T12:07:24.608Z

Learnt from: stktyagi
Repo: openwisp/openwisp-controller PR: 1378
File: openwisp_controller/pki/tests/test_api.py:155-155
Timestamp: 2026-06-07T12:07:24.608Z
Learning: When reviewing Python test files in this repository, avoid recommending inline comments that explain or justify `assertNumQueries` (Django query count) expectations. Query counts can change frequently as implementations evolve, and inline explanations add maintenance burden; the expected count should be understandable without added comment blocks.

Applied to files:

openwisp_controller/pki/tests/test_api.py

📚 Learning: 2026-06-07T12:07:25.164Z

Learnt from: stktyagi
Repo: openwisp/openwisp-controller PR: 1378
File: openwisp_controller/config/tests/test_config.py:864-865
Timestamp: 2026-06-07T12:07:25.164Z
Learning: When reviewing this repo’s Python test suite, treat changes to the *expected* query count in `assertNumQueries(...)` calls as routine test maintenance. If a PR updates the numeric argument (e.g., in `test_config.py`, `test_api.py`, `test_admin.py`, `test_pki.py`) and the test remains consistent with the feature changes, reviewers should not flag the increased number as a performance regression that requires investigation solely because the count went up; instead, focus on whether the update is intentional and the surrounding test/code changes justify the revised expectation.

Applied to files:

openwisp_controller/pki/tests/test_api.py

📝 Walkthrough

Walkthrough

Revoked certificates now fail renewal with a validation error before the parent renewal logic runs. Renewal and revocation lock the certificate row inside atomic transactions. The renewal API converts the model error into an HTTP 400 response. Tests verify preserved certificate and CRL state, row locking, and updated query counts. The REST API documentation describes the rejected renewal response.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Suggested reviewers: pandafy

Merge Risk: ⚪ Minimal · up to 753e0

Revoked certificate renewals are rejected without changing certificate or CRL state, while normal renewal remains covered. The change is ready to merge.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The changes satisfy issue `#1467`. `AbstractCert.renew()` rejects revoked certificates before renewal and preserves certificate state. `CertRenewView.post` returns the validation failure as an API `400`…
Out of Scope Changes check	✅ Passed	The production changes enforce revoked-certificate renewal rejection and API error handling for issue `#1467`. The model tests, API tests, query-count updates, and documentation support that behavior. N…
Ui Changes, Regression Test, Docs	✅ Passed	PASS. The PR changes REST API and certificate model behavior, not an end-user graphical UI; no template, static, frontend, web, UI, or HTML paths changed, so screenshots are not required. The PR adds …
Title check	✅ Passed	The title uses the required [fix] prefix and clearly describes the prevention of renewal for revoked X.509 certificates. It references issue `#1467`.
Description check	✅ Passed	The description includes all required checklist items, the linked issue, a clear summary of changes, regression test coverage, and a screenshot status of N/A.

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Actionable comments posted: 1

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Inline comments:
In `@openwisp_controller/pki/base/models.py`:
- Around line 42-46: Serialize certificate renewal with revocation by updating
the renewal flow around CertRenewView and the overridden renew method: execute
the revoked check and subsequent renewal save within a transaction while holding
a row-level lock, and ensure the revocation path uses the same locking strategy
or an equivalent conditional update that rechecks revoked before writing.
Preserve the existing ValidationError for certificates already revoked and
prevent renewal from overwriting a concurrent revocation.

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📒 Files selected for processing (4)

openwisp_controller/pki/api/views.py
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GitHub Check: Python==3.11 | django~=5.1.0
GitHub Check: Python==3.12 | django~=5.2.0
GitHub Check: Python==3.10 | django~=5.1.0
GitHub Check: Python==3.13 | django~=5.1.0
GitHub Check: Python==3.11 | django~=5.2.0
GitHub Check: Python==3.10 | django~=5.2.0
GitHub Check: Python==3.13 | django~=5.2.0
GitHub Check: Python==3.12 | django~=5.1.0

🧰 Additional context used

📓 Path-based instructions (2)

Ensure tests cover relevant success, error, boundary, and unusual input scenarios.

⚙️ CodeRabbit configuration file

Files:

openwisp_controller/pki/tests/test_models.py
openwisp_controller/pki/tests/test_api.py

Flag potential security vulnerabilities Flag obvious performance regressions, such as heavy loops, repeated I/O, or unoptimized queries Flag unused or redundant code Flag outdated or incorrect comments/docstrings Ensure new code handles err...

⚙️ CodeRabbit configuration file

Files:

openwisp_controller/pki/base/models.py
openwisp_controller/pki/api/views.py
openwisp_controller/pki/tests/test_models.py
openwisp_controller/pki/tests/test_api.py

🧠 Learnings (1)

📚 Learning: 2026-02-17T19:13:10.088Z

Learnt from: nemesifier
Repo: openwisp/openwisp-controller PR: 1175
File: openwisp_controller/config/whois/commands.py:0-0
Timestamp: 2026-02-17T19:13:10.088Z
Learning: In reviews for the openwisp/openwisp-controller repository, do not propose changes based on Ruff warnings. The project does not use Ruff as its linter; ignore Ruff-related suggestions and follow the repository’s established linting and configuration rules. This guidance applies to all Python files under the openwisp_controller directory.

Applied to files:

openwisp_controller/pki/base/models.py
openwisp_controller/pki/api/views.py
openwisp_controller/pki/tests/test_models.py

🔇 Additional comments (4)

openwisp_controller/pki/base/models.py (1)

1-1: LGTM!

Also applies to: 43-46

openwisp_controller/pki/tests/test_models.py (1)

59-71: LGTM!

openwisp_controller/pki/api/views.py (1)

1-1: LGTM!

Also applies to: 99-102

openwisp_controller/pki/tests/test_api.py (1)

1-2: LGTM!

Also applies to: 387-410

Closes openwisp#1467.

coveralls · 2026-09-15T16:36:43Z

coverage: 98.365% (+0.003%) from 98.362% — krrishnaik:issues/1467-prevent-renewing-revoked-certs into openwisp:master

openwisp-companion Bot mentioned this pull request Sep 15, 2026

[bug] Prevent renewing revoked X.509 certificates #1467

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openwisp-companion Bot added the ai-review label Sep 15, 2026

coderabbitai Bot requested changes Sep 15, 2026

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Comment thread openwisp_controller/pki/base/models.py Outdated

[fix] Prevent renewing revoked X.509 certificates openwisp#1467

753e003

Closes openwisp#1467.

krrishnaik force-pushed the issues/1467-prevent-renewing-revoked-certs branch from ab44ae2 to 753e003 Compare September 15, 2026 16:05

coderabbitai Bot approved these changes Sep 15, 2026

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[fix] Prevent renewing revoked X.509 certificates #1467 - #1488

[fix] Prevent renewing revoked X.509 certificates #1467#1488
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