feat(opa): expose caller principal from X-Forwarded-Client-Cert#275
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feat(opa): expose caller principal from X-Forwarded-Client-Cert#275
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Parse the URI subject alternative name out of the first XFCC entry and add it to the OPA evaluation input as `principal`. This lets policies authorize requests by SPIFFE identity (e.g., the caller's Kubernetes ServiceAccount under Istio mTLS) instead of relying on spoofable headers or remote address only. Empty string when the header is absent or the URI field is missing, so existing policies that don't reference `input.principal` continue to work unchanged. Amp-Thread-ID: https://ampcode.com/threads/T-019dcff2-09b6-71d9-873d-233efceccb70 Co-authored-by: Amp <amp@ampcode.com>
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joshfriend
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Apr 27, 2026
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Parse the URI subject alternative name out of the first XFCC entry and add it to the OPA evaluation input as
principal. This lets policies authorize requests by SPIFFE identity (e.g., the caller's Kubernetes ServiceAccount under Istio mTLS) instead of relying on spoofable headers or remote address only.Empty string when the header is absent or the URI field is missing, so existing policies that don't reference
input.principalcontinue to work unchanged.