Add support mandatory signed components

[jschlyter]

Fixed and closes #236

Summary by CodeRabbit

• Bug Fixes
  • Strengthened request signature verification by requiring signed requests to include content length, content type, and content digest headers.
  • Requests with incomplete signatures are now rejected with an authorization error, improving protection against tampered or improperly signed content.
• Tests
  • Added coverage confirming that signatures missing required headers fail verification.

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Review configuration:

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Team

Run ID: 35695cc6-fadf-4be2-aa86-6c42f81dbceb

📥 Commits

Reviewing files that changed from the base of the PR and between 666ef8f and 931faf2.

📒 Files selected for processing (3)

• aggrec/aggregates.py
• aggrec/helpers.py
• tests/test_http_signatures.py

📝 Walkthrough

Walkthrough

The request verifier now supports required signed headers and rejects signatures that omit them. Aggregate creation requires content-length, content-type, and content-digest. Tests cover rejection of signatures missing a configured header.

Changes

Signed header enforcement

Layer / File(s)	Summary
Verifier required-header contract aggrec/helpers.py	RequestVerifier accepts configured required headers, stores quoted covered-component names, and rejects signatures that omit any required header before content-digest validation.
Aggregate configuration and verification tests aggrec/aggregates.py, tests/test_http_signatures.py	Aggregate creation requires three signed headers. Tests configure required headers and assert rejection when user-agent is not signed.

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

Merge Risk: 🟠 High · up to 666ef

The change strengthens request signing for content fields, but aggregate type and interval remain unsigned even though they affect stored metadata, object placement, and emitted events. A validly signed request could therefore create authenticated-looking state with altered semantics, so the PR is not ready to merge until those inputs are bound to the signature.

Suggested reviewers: berrabou

Poem

A rabbit checks each header in line
Content length and type must sign
Digest joins the careful crew
Missing fields now fail review
Secure requests hop through fine

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 33.33% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 3 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The changes satisfy issue [#236]. The endpoint requires signatures to cover Content-Length, Content-Type, and Content-Digest. RequestVerifier rejects signatures that omit a required header, and tests …
Out of Scope Changes check	✅ Passed	All changes support the linked issue [#236]. The implementation, endpoint wiring, and verification tests are within scope.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main change: support for mandatory signed components. It is concise and related to the changeset.

Full details: Linked Issues check

Explanation

The changes satisfy issue [#236]. The endpoint requires signatures to cover Content-Length, Content-Type, and Content-Digest. RequestVerifier rejects signatures that omit a required header, and tests verify this behavior.

✨ Finishing Touches 💡 1

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Actionable comments posted: 1

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Inline comments:
In `@aggrec/aggregates.py`:
- Line 69: Update REQUIRED_SIGNED_HEADERS and the RequestVerifier validation to
require aggregate-interval when present, plus `@method` and either `@path` or
`@target-uri`, so create_aggregate’s interval and route-derived metadata, keys,
and events are covered by the signature; add negative tests for unsigned
Aggregate-Interval and changed routes.

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Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Team

Run ID: 84a783de-c0c8-4ce2-8278-f1d7e4f1ae4e

📥 Commits

Reviewing files that changed from the base of the PR and between 8a7e567 and 666ef8f.

📒 Files selected for processing (3)

• aggrec/aggregates.py
• aggrec/helpers.py
• tests/test_http_signatures.py

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