fix(csrf): use constant-time comparison and hide internal errors#138
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fix(csrf): use constant-time comparison and hide internal errors#138
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- Use crypto/subtle.ConstantTimeCompare for CSRF token validation - Log session save errors server-side instead of exposing to users - Show generic error message to prevent internal detail leakage
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Summary
crypto/subtle.ConstantTimeComparefor CSRF token validation to match the constant-time comparison pattern used throughout the codebase (metrics_auth.go, registration.go, device.go)Test plan
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