Add dev-only in-process mTLS termination to the http4s server#2869
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simonredfern merged 1 commit intoJul 15, 2026
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Successor of the RunMTLSWebApp.scala launcher removed with the Jetty teardown, as a props toggle on the normal server instead of a separate launcher: - Http4sMtls.scala: mtls.* props (honoured only when run.mode=development), SSLContext from JKS keystore/truststore, fs2 TLSContext + TLSParameters (client_auth need/want), and an HttpApp middleware that strips any client-supplied PSD2-CERT header and injects the handshake-verified client certificate as canonical PEM. - Http4sServer.scala: mtls.enabled branch on the Ember builder (withTLS + middleware); plain-HTTP path is unchanged when the prop is off. Warns when hostname is still http://. - sample.props.template: commented mtls.* block next to the other keystore props. - Http4sMtlsTest: unit tests for PEM encoding, header injection/stripping, SSLContext construction from the checked-in dev keystores. - Http4sMtlsHandshakeTest: end-to-end proof over a real TLS handshake that Ember populates ServerRequestKeys.SecureSession, the verified client cert surfaces as PSD2-CERT (spoofed header replaced), and certless handshakes are rejected under client_auth=need. - docs/MTLS_DEV_MODE.md: how-to (cert generation, props, smoke tests, consumer pinning, troubleshooting, production proxy guidance). Verified manually end-to-end: HTTPS on dev.port, certless handshake rejected, DirectLogin over mTLS, and /my/mtls/certificate/current returning the handshake certificate while ignoring a spoofed header.
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Successor of the RunMTLSWebApp.scala launcher removed with the Jetty teardown, as a props toggle on the normal server instead of a separate launcher:
Verified manually end-to-end: HTTPS on dev.port, certless handshake rejected, DirectLogin over mTLS, and /my/mtls/certificate/current returning the handshake certificate while ignoring a spoofed header.