feat(pkce): per client policy #52
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Warning Rate Limit Exceeded@james-d-elliott has exceeded the limit for the number of commits or files that can be reviewed per hour. Please wait 24 minutes and 44 seconds before requesting another review. How to resolve this issue?After the wait time has elapsed, a review can be triggered using the We recommend that you space out your commits to avoid hitting the rate limit. How do rate limits work?CodeRabbit enforces hourly rate limits for each developer per organization. WalkthroughThe changes bring significant enhancements to the PKCE Flow, focusing on improving security and flexibility in OAuth2 flows. Key improvements include the introduction of a per-client enforcement policy, refined session management, customizable CoreStrategy with token prefix options, and better error handling and reporting for PKCE-related issues. Changes
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This adds a PKCE policy control on a per-client basis and overhauls the testing of this particular handler and the particular error messages it returns.
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Actionable comments generated: 0
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Files selected for processing (8)
- README.md (2 hunks)
- authorize_response.go (1 hunks)
- client.go (1 hunks)
- compose/compose_pkce.go (1 hunks)
- handler/pkce/const.go (1 hunks)
- handler/pkce/handler.go (10 hunks)
- handler/pkce/handler_test.go (1 hunks)
- handler/pkce/storage.go (1 hunks)
Files not summarized due to errors (1)
- handler/pkce/handler_test.go: Error: Message exceeds token limit
Additional comments: 12
handler/pkce/const.go (1)
- 5-7: The regular expression used for
verifierWrongFormatcorrectly matches characters not allowed in a PKCE code verifier, aligning with the PKCE specification. This ensures that only valid characters are used, enhancing security.handler/pkce/storage.go (1)
- 12-12: Renaming
PKCERequestStoragetoStorageprovides a more generic and flexible interface name, suitable for managing PKCE request sessions. This change enhances clarity and adaptability in handling PKCE sessions.compose/compose_pkce.go (1)
- 16-16: Updating the type assertion to
pkce.Storagein theOAuth2PKCEFactoryfunction aligns with the recent changes to the PKCE storage interface, ensuring consistency and correct behavior in PKCE session management.authorize_response.go (1)
- 47-47: The modification to the
AddParametermethod, adding a conditional check for a specific constant before setting thecodefield, enhances the method's safety and ensures that only intended parameters can modify the authorization response's state.README.md (1)
- 42-42: The documentation updates in the README.md file accurately reflect the enhancements made to the PKCE Flow, including the introduction of a per-client enforcement policy and a customizable token prefix feature. These updates provide clear and helpful information on the changes.
client.go (1)
- 49-55: The introduction of the
ProofKeyCodeExchangeClientinterface, extending theClientinterface with PKCE-related methods, is a significant enhancement. It aligns with the PR's objectives to improve security and flexibility in the PKCE flow by allowing per-client PKCE enforcement.handler/pkce/handler.go (2)
- 11-11: Replacing the
regexppackage withfmtfor error formatting improves the readability and maintainability of error messages related to PKCE handling.- 38-49: > 📝 NOTE
This review was outside the diff hunks and was mapped to the diff hunk with the greatest overlap. Original lines [31-62]
The updates to the PKCE validation logic and the introduction of more detailed error reporting significantly enhance the robustness and clarity of the PKCE flow handling. These changes are crucial for improving security and providing clearer feedback in case of errors.
handler/pkce/handler_test.go (4)
- 23-352: The test cases within
TestHandler_HandleAuthorizeEndpointRequestare comprehensive and cover a wide range of scenarios, including different PKCE enforcement policies and error conditions. However, there are a few areas that could be improved for clarity and maintainability:
Repeated Setup Logic: The setup logic within each test case is quite repetitive, especially the configuration of
configandstore. Consider refactoring this setup into a helper function to reduce duplication and improve readability.Error Message Consistency: Ensure that the error messages are consistent and accurately describe the test scenario. For example, in the test case "ShouldFailNoPKCEButRequiredForClient", the error message could be more specific about why PKCE is required for the client.
Use of
context.TODO(): While usingcontext.TODO()in tests is generally acceptable, it's a good practice to use a real context with a timeout to prevent tests from hanging indefinitely if something goes wrong. Consider adding a timeout to these contexts.Magic Strings: There are several instances where "magic strings" are used, such as the client ID "test" and the PKCE challenge method "S256". It's a good practice to define these as constants at the top of your test file to avoid typos and make it easier to update these values in the future.
Consider refactoring the test setup logic into a helper function, adding timeouts to contexts, and defining commonly used strings as constants to improve the maintainability and readability of your tests.
- 401-1278: The
TestHandler_HandleTokenEndpointRequestfunction effectively tests various scenarios related to token endpoint requests, including PKCE verification and error handling. Similar to the previous function, there are areas for improvement:
Refactor Setup Logic: Similar to
TestHandler_HandleAuthorizeEndpointRequest, the setup logic is repetitive across test cases. Refactoring this into a helper function would improve readability and maintainability.Context with Timeout: Consider using a real context with a timeout instead of
context.TODO()to prevent tests from hanging indefinitely under certain conditions.Constants for Repeated Strings: Define commonly used strings, such as client IDs and PKCE challenge methods, as constants to avoid repetition and potential typos.
Error Message Clarity: Review the error messages to ensure they accurately describe the test scenario and provide clear guidance on the expected behavior or error condition.
Refactor repetitive setup logic into helper functions, use contexts with timeouts, define commonly used strings as constants, and ensure error messages are clear and descriptive to improve the quality and maintainability of your tests.
- 1325-1346: The miscellaneous tests in
TestMiscellaneousprovide basic coverage forCanSkipClientAuthandPopulateTokenEndpointResponsemethods. These tests are straightforward and do not exhibit any major issues. However, consider the following for future test enhancements:
Additional Assertions: For
PopulateTokenEndpointResponse, besides checking for no errors, it might be beneficial to assert that the response is populated as expected based on the input request.Context Usage: As with previous functions, consider using a context with a timeout for better control over test execution time.
While the current tests are adequate for basic validation, adding more detailed assertions and using contexts with timeouts could further improve test robustness and maintainability.
- 1348-1364: The
TestPKCEClientstruct and its methods are well-defined and serve their purpose within the test suite. However, consider adding comments to document the purpose of each method and the struct itself. This will improve code readability and help future maintainers understand the role ofTestPKCEClientin the test suite.Add comments to the
TestPKCEClientstruct and its methods to improve code documentation and readability.
This adds a PKCE policy control on a per-client basis and overhauls the testing of this particular handler and the particular error messages it returns.
Summary by CodeRabbit
OAuth2PKCEFactoryfunction for improved storage handling.regexpwithfmtin PKCE handler for more efficient error handling.PKCERequestStorageinterface toStoragefor clarity.