1

pkg/crypto/tls.go

@@ -0,0 +1,71 @@
+package crypto
+
+import (
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"crypto/tls"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/pem"
+	"math/big"
+	"net"
+	"os"
+	"time"
+)
+
+// GenerateSelfSignedCert 生成自签名证书
+func GenerateSelfSignedCert(certFile, keyFile string) error {
+	priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	if err != nil {
+		return err
+	}
+
+	serialNumber, err := rand.Int(rand.Reader, new(big.Int).Lsh(big.NewInt(1), 128))
+	if err != nil {
+		return err
+	}
+
+	template := x509.Certificate{
+		SerialNumber: serialNumber,
+		Subject: pkix.Name{
+			Organization: []string{"GoTunnel"},
+			CommonName:   "GoTunnel Server",
+		},
+		NotBefore:             time.Now(),
+		NotAfter:              time.Now().AddDate(10, 0, 0), // 10年有效期
+		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+		IPAddresses:           []net.IP{net.ParseIP("127.0.0.1")},
+		DNSNames:              []string{"localhost"},
+	}
+
+	certDER, err := x509.CreateCertificate(rand.Reader, &template, &template, &priv.PublicKey, priv)
+	if err != nil {
+		return err
+	}
+
+	// 写入证书文件
+	certOut, err := os.Create(certFile)
+	if err != nil {
+		return err
+	}
+	defer certOut.Close()
+	pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: certDER})
+
+	// 写入私钥文件
+	keyOut, err := os.Create(keyFile)
+	if err != nil {
+		return err
+	}
+	defer keyOut.Close()
+
+	privBytes, err := x509.MarshalECPrivateKey(priv)
+	if err != nil {
+		return err
+	}
+	pem.Encode(keyOut, &pem.Block{Type: "EC PRIVATE KEY", Bytes: privBytes})
+
+	return nil
+}