Azure 函数 - 连接到 SFTP 服务器时出错：输入字符串的格式不正确

Question

我正在尝试编写一组允许应用程序之间进行 SFTP 调用的 Azure 函数。我正在使用 Renci.SshNet 库。

对我来说这一切看起来都是正确的，但是当它运行时我收到错误：

连接到 SFTP 服务器时出错：输入字符串的格式不正确。

这是我设置的对象的快速示例（带有模糊的 var 值）：

// Configuration setup for SFTP
SFTPConfiguration config = new SFTPConfiguration
{
    Host = Environment.GetEnvironmentVariable("HOST"),
    Port = 22, // Hardcoded for testing
    Username = Environment.GetEnvironmentVariable("USERNAME"),
    Password = Environment.GetEnvironmentVariable("PASSWORD"),
    PrivateKeyPath = "[FilePath]"
};

SFTPInterface sftpInterface = new SFTPInterface(config);
sftpInterface.TestConnection();

这是我的 SFTPInterface 构造函数：

 public SFTPInterface(SFTPConfiguration config)
 {
     host = config.Host;
     port = config.Port;
     username = config.Username;

     if (!string.IsNullOrEmpty(config.PrivateKeyPath))
     {
         // Initialize privateKeyFile with config.Password only if the file requires it
         try
         {
             privateKeyFile = !string.IsNullOrEmpty(config.Password) ?
                                              new PrivateKeyFile(config.PrivateKeyPath, config.Password) :
                                              new PrivateKeyFile(config.PrivateKeyPath);
         }
         catch(IOException)
         {
             Console.WriteLine($"[SFTPInterface] Unable to read private key file at {config.PrivateKeyPath}");
         }
         // Instantiate the SftpClient using the privateKeyFile for authentication
         sftp = new SftpClient(host, port, username, privateKeyFile);
     }
     else if (!string.IsNullOrEmpty(config.Password))
     {
         // Instantiate the SftpClient using password for authentication
         sftp = new SftpClient(host, port, username, config.Password);
     }
     else
     {
         throw new ArgumentException("[SFTPInterface] Either a password or a private key path must be provided.");
     }

我已经阅读了一些潜在的原因并实施了解决方案，但没有运气：

• 端口必须是整数。我尝试将其硬编码为 int 并将其转换为 Int32。
• 密钥文件格式不正确。我尝试将其导入为 .key、.pem 和 .ppk。没有任何改变（除了抛出“无效密钥”错误的 ppk。

Answer 1

下面

code

为我工作（稍微修改了你的代码）：

using System;
using System.Text;
using Renci.SshNet;

public class RithwikSFTPConfiguration
{
    public string Rith_Host { get; set; }
    public int Rith_Port { get; set; }
    public string Rith_Username { get; set; }
    public string Rith_Password { get; set; }
    public string Rith_PrivateKeyPath { get; set; } // Directly provide private key
}

public class Rith_SFTP
{
    private string rith_host;
    private int rith_port;
    private string rith_username;
    private SftpClient rith_sftp;
    private PrivateKeyFile privateKeyFile;

    public Rith_SFTP(RithwikSFTPConfiguration config)
    {
        rith_host = config.Rith_Host;
        rith_port = config.Rith_Port;
        rith_username = config.Rith_Username;

        if (!string.IsNullOrEmpty(config.Rith_PrivateKeyPath))
        {
            try
            {
                privateKeyFile = !string.IsNullOrEmpty(config.Rith_Password) ?
                    new PrivateKeyFile(config.Rith_PrivateKeyPath, config.Rith_Password) :
                    new PrivateKeyFile(config.Rith_PrivateKeyPath);
            }
            catch (IOException)
            {
                Console.WriteLine($"Hello Rithwik, Unable to read private key file at {config.Rith_PrivateKeyPath}");
            }
            rith_sftp = new SftpClient(rith_host, rith_port, rith_username, privateKeyFile);
        }
        else if (!string.IsNullOrEmpty(config.Rith_Password))
        {
            rith_sftp = new SftpClient(rith_host, rith_port, rith_username, config.Rith_Password);
        }
        else
        {
            throw new ArgumentException("Hello Rithwik, Either a password or a private key path must be provided.");
        }
    }

    public void TestConnection()
    {
        try
        {
            rith_sftp.Connect();
            Console.WriteLine("Hello Rithwik, SFTP connection successful.");
            rith_sftp.Disconnect();
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Hello Rithwik, Error connecting to SFTP server: {ex.Message}");
        }
    }
}

public class Rith_SFTPFunction
{
    public static void Run()
    {
        RithwikSFTPConfiguration rith_conf = new RithwikSFTPConfiguration
        {
            Rith_Host = "rith32.blob.core.windows.net",
            Rith_Port = 22, 
            Rith_Username = "rith32.rithwik.user1",
            Rith_Password = "dwCMI1UzB7XcIt5o",
            Rith_PrivateKeyPath = @"C:\Users\Downloads\key1"
        };

        Rith_SFTP rith_s = new Rith_SFTP(rith_conf);
        rith_s.TestConnection();
    }
    public static void Main(string[] args)
    {
        Rith_SFTPFunction.Run();
    }
}

这里，

• 用户名应为

  storageaccountname.conatinername.username

• 输入密码

• 提供您的密钥对路径

• 主机名应为

  storageaccountname.blob.core.windows.net

  Output: