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shankar0123
989ad403e3
Closes the #2 acquisition-readiness blocker from the 2026-05-01 issuer coverage audit. New() at ejbca.go:L79-L88 previously constructed an http.Client with only Timeout set — no Transport, no TLSClientConfig. When AuthMode=mtls (the default), the client never presented the configured ClientCert/ClientKey. The OAuth2 path worked; mTLS always failed authentication. Tests passed because they injected a pre-built *http.Client via NewWithHTTPClient, a path the production factory never took. This commit: - Rewrites New() to load ClientCertPath + ClientKeyPath via tls.LoadX509KeyPair when AuthMode=mtls, configure *http.Transport.TLSClientConfig with MinVersion: TLS 1.2 (compatibility floor for on-prem EJBCA installs that may predate TLS 1.3), and return (*Connector, error). Constructs a fresh *http.Transport — does NOT clone http.DefaultTransport, which would leak mutation across the package boundary. - OAuth2 mode unchanged: returns a client with no transport customization (the Bearer header path is wired in setAuthHeaders). - Invalid auth_mode values return (nil, error) immediately rather than falling through to the mtls default and erroring at cert load. - Updates the factory call site at issuerfactory/factory.go for the new signature; the factory's outer (issuer.Connector, error) shape was already in place. - Adds TestNew_MTLSWiresClientCert: calls production New() (NOT NewWithHTTPClient) with real cert/key files generated via stdlib crypto/x509, asserts httpClient.Transport.TLSClientConfig.Certificates is non-empty. Includes an httptest TLS server with ClientAuth: tls.RequireAndVerifyClientCert that proves the cert is actually presented on the wire — not just stashed in a struct field. - Adds TestNew_MTLSCertLoadFailure: missing-cert path returns an error wrapping fs.ErrNotExist (verified via errors.Is). - Adds TestNew_OAuth2NoTransportTuning: OAuth2 path leaves Transport nil, ensuring no accidental mTLS bleedthrough. - Adds TestNew_InvalidAuthMode: explicit guard that auth_mode values other than "mtls"/"oauth2" return (nil, error) at New() time. - Adds export_test.go with HTTPClientForTest helper so the external ejbca_test package can inspect the connector's internal *http.Client for the wiring assertions. Compile-only during `go test`; production builds don't expose it. - Adds mustNewForValidateConfig test helper (OAuth2 placeholder connector) for the existing ValidateConfig-only tests; pre-fix they used New(nil, ...) which is no longer valid because nil config falls into the mTLS default branch that requires non-nil cert paths. - Updates ejbca_stubs_test.go (internal package) for the new (*Connector, error) signature; switches the dummy connector to OAuth2 mode so Config{} doesn't error at New(). Out of scope (separate follow-ups, per the prompt's explicit fence): - OAuth2 token refresh missing - Config.Token plaintext at runtime (needs SecretRef abstraction) - RevokeCertificate composite OrderID parsing (the issuerDN := "" line at ejbca.go:L313) Verified locally: - gofmt clean - go vet ./... clean - staticcheck ./... clean - golangci-lint run --timeout 5m ./... → 0 issues - go test -short -count=1 ./internal/connector/issuer/ejbca/ green - go test -short -count=1 ./internal/connector/issuerfactory/ green - go test -short -count=1 ./internal/service/ green - go build ./... success Audit reference: cowork/issuer-coverage-audit-2026-05-01/RESULTS.md Top-10 fix #2.