使用Tamir.sharpSsh.dll实现SFTP文件传输

技术2022-05-11 105

SFTP即加密文件传输协议(Secure file transfer protocol) ，与FTP不同的是，指令与数据在传输过程中都是经过加密的，防止在网络传输过程中密码和敏感信息被盗取。为了使用.Net来实现这一过程：

1.安装SFTP Server测试环境：

下载setupssh.exe 在服务器上按照提示安装setupssh.exe 打开一个命令行，找到OpenSSH目录（默认：C:/Program Files/OpenSSH）创建Group mkgroup -l >> . etc group 创建User mkpasswd -l >> . etc passwd

注:创建group和User请参考安装目录的readme.txt

2.下载SampleCode

3.新建一个工程，引用SampleCode中的Tamir.sharpSsh.dll，Org.Mentalis.Security.dll，DiffieHellman.dll

4.测试代码：

using System; using Tamir.SharpSsh; namespace SFTP{ /// <summary> /// Summary description for SFTPHelper. /// </summary> public class SFTPHelper { private SFTPHelper() { } private SshTransferProtocolBase m_sshCp; public bool Connected { get { return m_sshCp.Connected; } } public SFTPHelper(SshConnectionInfo connectionInfo) { // // TODO: Check connectionInfo // m_sshCp = new Sftp(connectionInfo.Host,connectionInfo.User); if (connectionInfo.Pass != null ) { m_sshCp.Password = connectionInfo.Pass; } if (connectionInfo.IdentityFile != null ) { m_sshCp.AddIdentityFile(connectionInfo.IdentityFile ); } } public void Connect() { if ( ! m_sshCp.Connected) { m_sshCp.Connect(); } } public void Close() { if (m_sshCp.Connected) { m_sshCp.Close(); } } public bool Upload( string localPath, string remotePath) { try { if ( ! m_sshCp.Connected) { m_sshCp.Connect(); } m_sshCp.Put(localPath, remotePath); return true ; } catch { return false ; } } public bool Download( string remotePath, string localPath) { try { if ( ! m_sshCp.Connected) { m_sshCp.Connect(); } m_sshCp.Get(remotePath,localPath); return true ; } catch { return false ; } } }}

using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using SFTP; namespace TestSFTP { /// <summary> /// Summary description for Form1. /// </summary> public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.GroupBox groupBox1; private System.Windows.Forms.Label label1; private System.Windows.Forms.Label label2; private System.Windows.Forms.Label label3; private System.Windows.Forms.TextBox txtHostName; private System.Windows.Forms.TextBox txtUserName; private System.Windows.Forms.TextBox txtPassword; private System.Windows.Forms.GroupBox groupBox2; private System.Windows.Forms.OpenFileDialog openFileDialog1; private System.Windows.Forms.Label label4; private System.Windows.Forms.Button button1; private System.Windows.Forms.Label label5; private System.Windows.Forms.Button button2; private System.Windows.Forms.Button button3; private System.Windows.Forms.TextBox txtLocalFile; private System.Windows.Forms.TextBox txtRemoteFile; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; public Form1() { // // Required for Windows Form Designer support // InitializeComponent(); // // TODO: Add any constructor code after InitializeComponent call // } /// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } Windows Form Designer generated code /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); } private void button1_Click(object sender, System.EventArgs e) { openFileDialog1 = new OpenFileDialog(); openFileDialog1.RestoreDirectory = true ; openFileDialog1.Filter = "All files (*.*)|*.*"; if(openFileDialog1.ShowDialog() == DialogResult.OK) { this.txtLocalFile.Text = openFileDialog1.FileName; } } private void button2_Click(object sender, System.EventArgs e) { SshConnectionInfo objInfo = new SshConnectionInfo(); objInfo.Host = this.txtHostName.Text; objInfo.User = this.txtUserName.Text; objInfo.Pass = this.txtPassword.Text; SFTPHelper objSFTPHelper = new SFTPHelper(objInfo); objSFTPHelper.Connect(); if(objSFTPHelper.Connected) { objSFTPHelper.Upload(this.txtLocalFile.Text,this.txtRemoteFile.Text); objSFTPHelper.Close(); MessageBox.Show("Upload Successful"); } this.txtLocalFile.Text = ""; this.txtRemoteFile.Text = ""; } private void button3_Click(object sender, System.EventArgs e) { SshConnectionInfo objInfo = new SshConnectionInfo(); objInfo.Host = this.txtHostName.Text; objInfo.User = this.txtUserName.Text; objInfo.Pass = this.txtPassword.Text; SFTPHelper objSFTPHelper = new SFTPHelper(objInfo); objSFTPHelper.Connect(); if(objSFTPHelper.Connected) { objSFTPHelper.Download(this.txtRemoteFile.Text,this.txtLocalFile.Text); objSFTPHelper.Close(); MessageBox.Show("Download Successful!"); } this.txtLocalFile.Text = ""; this.txtRemoteFile.Text = ""; } }}

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