feat: support ssh key/pem file in DB syncer (#2727)

* feat: support connect database with ssh tunnel in syncer

* feat: improve i18n translate

* feat: improve code format and i18n

object/viaSSHDialer.go

@@ -0,0 +1,116 @@
+// Copyright 2024 The Casdoor Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package object
+
+import (
+	"context"
+	"database/sql/driver"
+	"fmt"
+	"net"
+	"time"
+
+	mssql "github.com/denisenkom/go-mssqldb"
+
+	"github.com/lib/pq"
+	"golang.org/x/crypto/ssh"
+)
+
+type ViaSSHDialer struct {
+	Client       *ssh.Client
+	Context      *context.Context
+	DatabaseType string
+}
+
+func (v *ViaSSHDialer) MysqlDial(ctx context.Context, addr string) (net.Conn, error) {
+	return v.Client.Dial("tcp", addr)
+}
+
+func (v *ViaSSHDialer) Open(s string) (_ driver.Conn, err error) {
+	if v.DatabaseType == "mssql" {
+		c, err := mssql.NewConnector(s)
+		if err != nil {
+			return nil, err
+		}
+		c.Dialer = v
+		return c.Connect(context.Background())
+	} else if v.DatabaseType == "postgres" {
+		return pq.DialOpen(v, s)
+	}
+	return nil, nil
+}
+
+func (v *ViaSSHDialer) Dial(network, address string) (net.Conn, error) {
+	return v.Client.Dial(network, address)
+}
+
+func (v *ViaSSHDialer) DialContext(ctx context.Context, network string, addr string) (net.Conn, error) {
+	return v.Client.DialContext(ctx, network, addr)
+}
+
+func (v *ViaSSHDialer) DialTimeout(network, address string, timeout time.Duration) (net.Conn, error) {
+	return v.Client.Dial(network, address)
+}
+
+func DialWithPassword(SshUser string, SshPassword string, SshHost string, SshPort int) (*ssh.Client, error) {
+	address := fmt.Sprintf("%s:%d", SshHost, SshPort)
+	config := &ssh.ClientConfig{
+		User: SshUser,
+		Auth: []ssh.AuthMethod{
+			ssh.Password(SshPassword),
+		},
+		HostKeyCallback: ssh.InsecureIgnoreHostKey(),
+	}
+
+	return ssh.Dial("tcp", address, config)
+}
+
+func DialWithCert(SshUser string, CertId string, SshHost string, SshPort int) (*ssh.Client, error) {
+	address := fmt.Sprintf("%s:%d", SshHost, SshPort)
+	config := &ssh.ClientConfig{
+		User:            SshUser,
+		HostKeyCallback: ssh.InsecureIgnoreHostKey(),
+	}
+
+	cert, err := GetCert(CertId)
+	if err != nil {
+		return nil, err
+	}
+
+	signer, err := ssh.ParsePrivateKey([]byte(cert.PrivateKey))
+	if err != nil {
+		return nil, err
+	}
+	config.Auth = []ssh.AuthMethod{
+		ssh.PublicKeys(signer),
+	}
+	return ssh.Dial("tcp", address, config)
+}
+
+func DialWithPrivateKey(SshUser string, PrivateKey []byte, SshHost string, SshPort int) (*ssh.Client, error) {
+	address := fmt.Sprintf("%s:%d", SshHost, SshPort)
+	config := &ssh.ClientConfig{
+		User:            SshUser,
+		HostKeyCallback: ssh.InsecureIgnoreHostKey(),
+	}
+
+	signer, err := ssh.ParsePrivateKey(PrivateKey)
+	if err != nil {
+		return nil, err
+	}
+	config.Auth = []ssh.AuthMethod{
+		ssh.PublicKeys(signer),
+	}
+	return ssh.Dial("tcp", address, config)
+}