Add more explicit auto id tests

[dastansam]

PR Type

enhancement, tests

---

Description

• Added a new test test_auto_id_deterministic to ensure deterministic auto ID generation for certificates using the blake2b_256 hashing function.
• Verified the auto ID for both issuer and child certificates, ensuring the correct implementation of the hashing and encoding processes.

---

Changes walkthrough 📝

Relevant files

Tests

test_certificate_manager.py Add Deterministic Auto ID Generation Tests for Certificates tests/auto_identity_tests/test_certificate_manager.py Added a new import for blake2b_256 hashing function. Added a new test test_auto_id_deterministic to verify deterministic auto ID generation for certificates. Ensured the PEM certificate is in bytes and verified the auto ID of both issuer and child certificates using blake2b_256. +23/-0

---

💡 PR-Agent usage:
Comment /help on the PR to get a list of all available PR-Agent tools and their descriptions

[github-actions]

PR Description updated to latest commit (9f1e74d)

[github-actions]

PR Review 🔍

⏱️ Estimated effort to review [1-5]	2, because the PR is focused on adding a specific test for deterministic auto ID generation, which is a relatively straightforward task. The changes are well-documented and localized to a single test function.
🧪 Relevant tests	Yes
⚡ Possible issues	Hardcoded Values: The test test_auto_id_deterministic uses hardcoded values for expected auto IDs. This could lead to brittle tests that might fail if the underlying implementation changes.
🔒 Security concerns	No

Code feedback:

---

relevant file	tests/auto_identity_tests/test_certificate_manager.py
suggestion	Consider using a dynamic calculation for the expected auto ID values instead of hardcoding them. This will make the tests more robust against changes in the hashing function or its implementation. [important]
relevant line	assert issuer_auto_id == "8d2143d76615c515b5cc88fa7806aef268edeea87571c8f8b21a19f77b9993ba"

---

relevant file	tests/auto_identity_tests/test_certificate_manager.py
suggestion	Add cleanup code or use a fixture to handle the creation and disposal of keys and certificates to prevent any side effects between tests. [medium]
relevant line	private_key, _ = key_management.generate_ed25519_key_pair()

---

relevant file	tests/auto_identity_tests/test_certificate_manager.py
suggestion	Consider verifying the entire certificate chain's auto ID, not just the issuer and child, to ensure complete coverage and integrity of the certificate hierarchy. [medium]
relevant line	child_certificate = self_issuer.issue_certificate(self_issuer.create_and_sign_csr("child"))

---

[github-actions]

PR Code Suggestions ✨

Category	Suggestion	Score
Possible issue	Replace hardcoded hash value with dynamic calculation in tests Replace the hardcoded hash value with a dynamic calculation to ensure the test remains valid even if the underlying data or hash function changes. tests/auto_identity_tests/test_certificate_manager.py [143] -assert issuer_auto_id == "8d2143d76615c515b5cc88fa7806aef268edeea87571c8f8b21a19f77b9993ba" +expected_issuer_auto_id = blake2b_256(self_issuer.get_subject_common_name(certificate.subject).encode()).hex() +assert issuer_auto_id == expected_issuer_auto_id Suggestion importance[1-10]: 8 Why: The suggestion correctly identifies a hardcoded value in a test assertion, which can lead to brittle tests if underlying data changes. Replacing it with a dynamic calculation improves the test's robustness and adaptability.	8
Enhancement	Ensure the blake2b_256 function is correctly imported and functional Add a test to verify that the blake2b_256 function is correctly imported and functional, as it is critical for generating deterministic IDs. tests/auto_identity_tests/test_certificate_manager.py [4] from auto_identity import blake2b_256 +def test_blake2b_256_functionality(): + test_input = "test".encode() + expected_output = "..." # Expected hash result + assert blake2b_256(test_input).hex() == expected_output Suggestion importance[1-10]: 7 Why: Testing the functionality of blake2b_256 is important since it's critical for generating deterministic IDs. This suggestion ensures that any issues with the function are caught early in the testing phase.	7
Best practice	Add error handling for cryptographic operations to manage potential exceptions Consider adding error handling for the cryptographic operations to manage exceptions that might occur during key generation, certificate issuance, or CSR creation. tests/auto_identity_tests/test_certificate_manager.py [131-146] -private_key, _ = key_management.generate_ed25519_key_pair() -certificate = self_issuer.self_issue_certificate(subject_name) -child_certificate = self_issuer.issue_certificate(self_issuer.create_and_sign_csr("child")) +try: + private_key, _ = key_management.generate_ed25519_key_pair() + certificate = self_issuer.self_issue_certificate(subject_name) + child_certificate = self_issuer.issue_certificate(self_issuer.create_and_sign_csr("child")) +except Exception as e: + # Handle exceptions appropriately + print(f"An error occurred: {e}") Suggestion importance[1-10]: 7 Why: Adding error handling for cryptographic operations is a best practice that can prevent unhandled exceptions from causing runtime failures, especially in security-sensitive operations like key generation and certificate handling.	7
Maintainability	Use descriptive variable names for clarity Use a more descriptive variable name than subject_name to enhance code readability and maintainability. tests/auto_identity_tests/test_certificate_manager.py [132] -subject_name = "Test" +test_subject_name = "Test" Suggestion importance[1-10]: 5 Why: While the suggestion to rename subject_name to test_subject_name enhances clarity, it is a minor improvement and does not significantly impact the overall maintainability or readability of the code.	5

[EmilFattakhov]

Left a few comments, nothing blocking!

[EmilFattakhov]

These assertions are a bit long, consider a slight refactor

Suggested change

	assert CertificateManager.get_certificate_auto_id(child_certificate) == blake2b_256(CertificateManager.get_certificate_auto_id(
	computed_auto_id = blake2b_256(CertificateManager.get_certificate_auto_id(certificate).encode() + self_issuer.get_subject_common_name(child_certificate.subject).encode()).hex()
	assert CertificateManager.get_certificate_auto_id(child_certificate) == computed_auto_id

[EmilFattakhov]

Suggested change

certificate).encode() + self_issuer.get_subject_common_name(child_certificate.subject).encode()).hex()

[EmilFattakhov]

I wasn't familiar where the hardcoded hash was coming from, until I've done a quick Googling. While this is not a huge problem now, may be confusing in a long run.

I would suggest to introduce two constants "8d2143d76615c515b5cc88fa7806aef268edeea87571c8f8b21a19f77b9993ba" and "d1575259a7e413f51e24ece5e353f5015fb0e39e6738b2044a3d7a8c3bc11114" closer to beginning of the file or function, and highlight that they're coming from the blake2b_256 library.
Maybe something like EXPECTED_SELF_ISSUED_CERT_BLAKE2B_HASH and EXPECTED_CHILD_CERT_BLAKE2B_HASH could work good, wdyt?