Description

Fix sonarcloud reported issue where err is returned when it is nil

Motivation and Context

How This Has Been Tested

Screenshots (if appropriate)

Types of changes

[x] Bug fix (non-breaking change which fixes an issue)
[ ] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to change)
[ ] Refactoring or add test (improvements in base code or adds test coverage to functionality)

Checklist

[ ] I ensured that the documentation is up to date
[ ] I explained why this PR updates go.mod in detail with reasoning why it's required
[ ] I would like a code coverage CI quality gate exception and have explained why

PR Type

Bug fix

Description

Fixed an issue where a nil error was incorrectly handled in the validateSignature method within the ProcessRequest function in gateway/mw_auth_key.go.

Changes walkthrough 📝

Relevant files

Bug fix

mw_auth_key.go

Fix nil error check in `validateSignature` method

gateway/mw_auth_key.go

Fixed the condition to correctly handle non-nil errors in
validateSignature.

+1/-1

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github-actions[bot] commented 4 months ago

PR Reviewer Guide 🔍

⏱️ Estimated effort to review [1-5]	1
🧪 Relevant tests	No
🔒 Security concerns	No
⚡ Key issues to review	None

github-actions[bot] commented 4 months ago

API Changes

no api changes detected

github-actions[bot] commented 4 months ago

PR Code Suggestions ✨

Category	Suggestion	Score
Error handling	Handle potential errors from `storage.TokenID` to prevent undefined behavior ___ Consider handling the case where `err` is not nil after the call to `storage.TokenID(key)`. This would improve error handling and avoid proceeding with an undefined `keyID`. [gateway/mw_auth_key.go [175-177]](https://github.com/TykTechnologies/tyk/pull/6365/files#diff-aeba053023a54c723dd9f83837e29ca0b2d9a212bc98fa6ad4bbb062669a1cf0R175-R177) ```diff keyID, err := storage.TokenID(key) -if err == nil { - err, statusCode := k.validateSignature(r, keyID) +if err != nil { + return err, http.StatusBadRequest // or another appropriate error code +} +err, statusCode := k.validateSignature(r, keyID) ``` Suggestion importance[1-10]: 10 Why: This suggestion improves error handling by ensuring that the function does not proceed with an undefined `keyID`, which could lead to unpredictable behavior. This is a crucial fix for stability.	10
Possible bug	Ensure a meaningful status code is returned when an error occurs ___ The condition `if err != nil` should be followed by a return statement that includes a default or meaningful status code if `statusCode` is not set, to avoid returning an uninitialized `statusCode`. [gateway/mw_auth_key.go [178-179]](https://github.com/TykTechnologies/tyk/pull/6365/files#diff-aeba053023a54c723dd9f83837e29ca0b2d9a212bc98fa6ad4bbb062669a1cf0R178-R179) ```diff if err != nil { + if statusCode == 0 { + statusCode = http.StatusInternalServerError // or another appropriate default code + } return err, statusCode } ``` Suggestion importance[1-10]: 9 Why: This suggestion addresses a potential bug where an uninitialized status code might be returned, ensuring that a meaningful status code is always provided. This is important for robust error handling.	9
Best practice	Adjust the order of return values from `validateSignature` to follow Go's convention ___ The function `validateSignature` should return values in the order `(statusCode, err)` to follow Go's convention of returning the error as the last value. This will also require updating the handling of the returned values. [gateway/mw_auth_key.go [177]](https://github.com/TykTechnologies/tyk/pull/6365/files#diff-aeba053023a54c723dd9f83837e29ca0b2d9a212bc98fa6ad4bbb062669a1cf0R177-R177) ```diff -err, statusCode := k.validateSignature(r, keyID) +statusCode, err := k.validateSignature(r, keyID) ``` Suggestion importance[1-10]: 8 Why: This suggestion follows Go's convention of returning the error as the last value, which improves code readability and consistency. It is a best practice but not a critical fix.	8
Maintainability	Refactor the nested conditionals to improve code readability and maintainability ___ Refactor the nested conditionals for better readability and maintainability. Flatten the structure by handling error cases first and returning early. [gateway/mw_auth_key.go [176-180]](https://github.com/TykTechnologies/tyk/pull/6365/files#diff-aeba053023a54c723dd9f83837e29ca0b2d9a212bc98fa6ad4bbb062669a1cf0R176-R180) ```diff -if err == nil { - err, statusCode := k.validateSignature(r, keyID) - if err != nil { - return err, statusCode - } +if err != nil { + return nil, http.StatusOK // Assuming no error means success +} +statusCode, err := k.validateSignature(r, keyID) +if err != nil { + return err, statusCode } ``` Suggestion importance[1-10]: 7 Why: This suggestion improves code readability and maintainability by flattening nested conditionals. While it enhances the code structure, it is not as critical as fixing functional issues.	7