added tabs to terminal, split single .go to separate files

internals/tls.go

@@ -0,0 +1,42 @@
+package internals
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/tls"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"io"
+	"math/big"
+	"net"
+	"strings"
+	"time"
+)
+
+// tlsHandshakeFilter drops "TLS handshake error" log lines (expected noise from
+// browsers rejecting self-signed certs) and forwards everything else unchanged.
+type tlsHandshakeFilter struct{ w io.Writer }
+
+func (f tlsHandshakeFilter) Write(p []byte) (int, error) {
+	if strings.Contains(string(p), "TLS handshake error") {
+		return len(p), nil
+	}
+	return f.w.Write(p)
+}
+
+func generateSelfSignedCert() (tls.Certificate, error) {
+	priv, _ := rsa.GenerateKey(rand.Reader, 2048)
+	serial, _ := rand.Int(rand.Reader, new(big.Int).Lsh(big.NewInt(1), 128))
+	tmpl := x509.Certificate{
+		SerialNumber: serial,
+		Subject:      pkix.Name{Organization: []string{"GoTermix"}, CommonName: "localhost"},
+		NotBefore:    time.Now(),
+		NotAfter:     time.Now().Add(365 * 24 * time.Hour),
+		KeyUsage:     x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:  []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		DNSNames:     []string{"localhost"},
+		IPAddresses:  []net.IP{net.ParseIP("127.0.0.1"), net.ParseIP("::1")},
+	}
+	der, _ := x509.CreateCertificate(rand.Reader, &tmpl, &tmpl, &priv.PublicKey, priv)
+	return tls.Certificate{Certificate: [][]byte{der}, PrivateKey: priv}, nil
+}