feat(decision-logs): apply the mask_decision policy to events - #186
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feat(decision-logs): apply the mask_decision policy to events#186sspaink wants to merge 1 commit into
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Decision events are now redacted by the policy at
decision_logs.mask_decision (default system/log/mask) before they are
buffered, uploaded, or written to the console.
MaskRuleSet ports plugins/logs/mask.go: the shorthand string form and the
structured {op, path, value} form, url.PathUnescape/PathEscape segment
handling, Go's silent skipping of undefined paths, and the bookkeeping of
applied rules in the event's erased/masked arrays. A mask policy that
fails to prepare, evaluate, or parse drops the event rather than logging
it unmasked, matching OPA Go. The prepared query is cached until a bundle
is activated, as Go caches until its compiler is updated.
Because this SDK evaluates compiled IR plans rather than running a
compiler, the mask policy has to be built as an entrypoint
(opa build -t plan -e system/log/mask). When an explicitly configured
entrypoint has no plan, masking is inactive and says so with a warning.
IR plans wrap results as {"result": <value>}. That envelope is now
stripped before the decision is returned or logged, so mask rules address
/result/<field> and callers get the decision value itself -- the shape
both READMEs already document.
Fixes open-policy-agent#73
BREAKING CHANGE: Opa.DecisionResult.getResult() returns the decision
value instead of the {"result": <value>} envelope. Callers reading
getResult().get("result") should read getResult() directly;
getResult().asBoolean() and getResultAs(Class) now behave as documented.
Signed-off-by: Sebastian Spaink <sebastianspaink@gmail.com>
sspaink
marked this pull request as ready for review
August 6, 2026 19:08
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Fixes #73
Implements
decision_logs.mask_decision: decision events are redacted before they are buffered, uploaded, or written to the console.MaskRuleSetportsv1/plugins/logs/mask.go, and a masking failure drops the event rather than logging it unmasked.The mask policy has to be built as a plan entrypoint (
opa build -t plan -e system/log/mask), since this SDK evaluates compiled plans. A configured entrypoint with no plan logs a warning.