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Enchantrix/AUDIT-CONCURRENCY.md
google-labs-jules[bot] 7c2949a939 fix(crypt): resolve race condition in service initialization 
A data race was identified in the lazy initialization of the RSA and PGP services within the `crypt` package. The non-thread-safe `if s.service == nil` check could lead to multiple initializations when accessed concurrently.

This commit resolves the race condition by using `sync.Once` to ensure that the initialization for each service is performed exactly once, making the `Service` struct safe for concurrent use.

Additionally, a new test file, `race_test.go`, has been added to provide a regression test for this specific scenario.

A new file, `AUDIT-CONCURRENCY.md`, has been created to document the findings of the concurrency audit, the remediation steps taken, and the verification process.

Co-authored-by: Snider <631881+Snider@users.noreply.github.com>
2026-02-02 01:20:31 +00:00

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Concurrency and Race Condition Analysis (AUDIT-CONCURRENCY.md)

1. Executive Summary

A concurrency audit was performed on the codebase to identify potential race conditions and thread-safety issues. The audit focused on encryption operations, connection pooling, cache synchronization, and key management.

A critical data race was identified in the lazy initialization of the RSA and PGP services within the pkg/crypt package. This could lead to unpredictable behavior and resource leaks under concurrent use.

The issue was resolved by implementing thread-safe initialization using the sync.Once primitive from the Go standard library.

2. Methodology

The audit consisted of the following steps:

  1. Static Analysis: A manual review of the codebase was conducted, focusing on areas with high potential for concurrency issues, such as the pkg/crypt package.
  2. Dynamic Analysis: The Go race detector (go test -race ./...) was used to identify data races during test execution. A new test case was created to specifically trigger the suspected race condition.

3. Findings

3.1. Data Race in Lazy Initialization

  • Location: pkg/crypt/crypt.go, in the ensureRSA() and ensurePGP() methods.
  • Description: The ensureRSA() and ensurePGP() methods used a non-thread-safe if s.rsa == nil check for lazy initialization. This created a race condition where multiple goroutines could enter the initialization block simultaneously, leading to multiple service instantiations and overwriting the service pointer.
  • Impact: This could cause unpredictable behavior, memory leaks, and potentially panics if the service initialization had side effects.
  • Reproduction: The race condition was reliably reproduced by creating a new test case (pkg/crypt/race_test.go) that called the ensure methods from multiple goroutines in parallel.

4. Remediation

The data race was remediated by using sync.Once to ensure that the initialization of the rsa.Service and pgp.Service happens exactly once, even when called from multiple goroutines.

The following changes were made to pkg/crypt/crypt.go:

  1. Added rsaOnce sync.Once and pgpOnce sync.Once fields to the Service struct.
  2. Modified ensureRSA() to use s.rsaOnce.Do().
  3. Modified ensurePGP() to use s.pgpOnce.Do().

5. Verification

The fix was verified by running the test suite with the race detector (go test -race ./...). The tests passed without any race warnings, confirming that the fix is effective. The new test case in pkg/crypt/race_test.go now serves as a regression test for this specific issue.

6. Conclusion

The audit identified and remediated a critical data race in the pkg/crypt package. The codebase is now more robust and safe for concurrent use. No other concurrency issues were identified in the audited areas.