fix: always verify TLS on aibridgeproxyd upstream transport (#26131) … · coder/coder@d875dd1

proxy.CertStore = NewCertCache()

}

// Always set secure TLS defaults, overriding goproxy's default.

// This ensures secure TLS connections for:

// - HTTPS upstream proxy connections

// - MITM'd requests if aibridge uses HTTPS

// Override goproxy's default transport, which has InsecureSkipVerify: true.

// This applies to all proxy.Tr traffic: MITM'd requests forwarded to aibridge,

// passthrough requests, and HTTPS upstream proxy connections. Proxy is

// intentionally unset so MITM'd requests go directly to aibridge, never

// through an upstream proxy or HTTPS_PROXY env var.

rootCAs, err := x509.SystemCertPool()

if err != nil {

return nil, xerrors.Errorf("failed to load system certificate pool: %w", err)

}

proxy.Tr = &http.Transport{

TLSClientConfig: &tls.Config{

MinVersion: tls.VersionTLS12,

RootCAs: rootCAs,

},

}

srv := &Server{

ctx: ctx,

}

}

// Set transport without Proxy to ensure MITM'd requests go directly to aibridge,

// not through any upstream proxy.

proxy.Tr = &http.Transport{

TLSClientConfig: &tls.Config{

MinVersion: tls.VersionTLS12,

RootCAs: rootCAs,

},

}

// Add custom CA certificate if provided (for corporate proxies with private CAs).

// If no CA certificate is provided, the system certificate pool is used.

if opts.UpstreamProxyCA != "" {