当使用 Java Apache FTPClient 进行 FTP TLS 获取“握手期

素材狗 2022-01-01 11:13:26 文章分类：Java问题点击数：次

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When using Java Apache FTPClient for FTP TLS getting quot;Remote host closed connection during handshakequot;(当使用 Java Apache FTPClient 进行 FTP TLS 获取“握手期间远程主机关闭连接时)

本文介绍了当使用 Java Apache FTPClient 进行 FTP TLS 获取“握手期间远程主机关闭连接"时的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我在 Windows 10 64x 上为 FTP TLS (org.apache.commons.net.ftp) 运行了一个 Java (1.8) 程序:

I ran a Java (1.8) program on Windows 10 64x for FTP TLS (org.apache.commons.net.ftp):

FTPSClient ftpClient = new FTPSClient();

System.setProperty("https.protocols", "TLSv1,TLSv1.1,TLSv1.2");
// LISTENER
ftpClient.addProtocolCommandListener(
    new PrintCommandListener(new PrintWriter(System.out), true));

ftpClient.connect(server);
ftpClient.login(user, pass);

// Enter local passive mode
ftpClient.enterLocalPassiveMode();
// useEpsvWithIPv4
ftpClient.setUseEPSVwithIPv4(true);
// Set protection buffer size
ftpClient.execPBSZ(0);
// Set data channel protection to private
ftpClient.execPROT("P");

System.setProperty("https.protocols", "TLSv1,TLSv1.1,TLSv1.2");

ftpClient.setTrustManager(TrustManagerUtils.getAcceptAllTrustManager());

ftpClient.setFileType(FTP.BINARY_FILE_TYPE);

System.out.println("Remote system is " + 
ftpClient.getEnabledCipherSuites());

System.out.println("SSL: " + 
ftpClient.getEnableSessionCreation());
// PROTOCOLOS
String[] Protocols = ftpClient.getEnabledProtocols();
System.out.println("Protocols " + Protocols);
// AUTH
boolean Auth = ftpClient.getNeedClientAuth();
System.out.println("Auth: " + Auth);
ftpClient.getWantClientAuth();
ftpClient.getTrustManager();
ftpClient.feat();              

// APPROACH #1: using retrieveFile(String, OutputStream)
String remoteFile1 = "/readme.txt";
File downloadFile1 = new File("C:\readme.txt");
OutputStream outputStream1 = new BufferedOutputStream(new 
FileOutputStream(downloadFile1));
ftpClient.retrieveFile(remoteFile1, outputStream1);
outputStream1.close();

对于第一个 FTP 服务器(Microsoft FTP 服务)工作正常！调试:

For the first FTP server (Microsoft FTP Service) works just fine! debug:

run:
220 Microsoft FTP Service
AUTH TLS
234 AUTH command ok. Expecting TLS Negotiation.
USER *******
331 Password required for demo.
PASS *******
230 User logged in.
PBSZ 0
200 PBSZ command successful.
PROT P
200 PROT command successful.
TYPE I
200 Type set to I.
SSL: true
SYST
215 Windows_NT
Remote system is Windows_NT
Protocols [Ljava.lang.String;@3f2a3a5
Auth: false
FEAT
211-Extended features supported:
 LANG EN*
 UTF8
 AUTH TLS;TLS-C;SSL;TLS-P;
 PBSZ
 PROT C;P;
 CCC
 HOST
 SIZE
 MDTM
 REST STREAM
211 END
EPSV
229 Entering Extended Passive Mode (|||1025|)
RETR /readme.txt
125 Data connection already open; Transfer starting.
226 Transfer complete.
QUIT
221 Goodbye.
BUILD SUCCESSFUL (total time: 7 seconds)

第二个FTP服务器(FileZilla Server 0.9.59 beta)出错，调试:

For the second FTP server (FileZilla Server 0.9.59 beta) goes wrong, debug:

run:
220-FileZilla Server 0.9.59 beta
220-written by Tim Kosse (tim.kosse@filezilla-project.org)
220 Please visit https://filezilla-project.org/
AUTH TLS
234 Using authentication type TLS
USER *******
331 Password required for xxx
PASS *******
230 Logged on
PBSZ 0
200 PBSZ=0
PROT P
200 Protection level set to P
TYPE I
200 Type set to I
SSL: true
SYST
215 UNIX emulated by FileZilla
Remote system is UNIX emulated by FileZilla
Protocols [Ljava.lang.String;@246ae04d
Auth: false
FEAT
211-Features:
 MDTM
 REST STREAM
 SIZE
 MLST type*;size*;modify*;
 MLSD
 AUTH SSL
 AUTH TLS
 PROT
 PBSZ
 UTF8
 CLNT
 MFMT
 EPSV
 EPRT
211 End
EPSV
229 Entering Extended Passive Mode (|||14393|)
RETR /readme.txt
150 Opening data channel for file download from server of "/readme.txt"
Error: Remote host closed connection during handshake
javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake
QUIT
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1002)
450 TLS session of data connection has not resumed or the session does not match the control connection
    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1385)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1413)
    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1397)
    at org.apache.commons.net.ftp.FTPSClient._openDataConnection_(FTPSClient.java:646)
    at org.apache.commons.net.ftp.FTPClient._retrieveFile(FTPClient.java:1899)
    at org.apache.commons.net.ftp.FTPClient.retrieveFile(FTPClient.java:1885)
    at ftps.App_FTP.main(App_FTP.java:96)
Caused by: java.io.EOFException: SSL peer shut down incorrectly
    at sun.security.ssl.InputRecord.read(InputRecord.java:505)
    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:983)
    ... 7 more
BUILD SUCCESSFUL (total time: 5 seconds)

使用 FileZilla 客户端可以正常工作(下载/上传文件)，但使用 Java 代码我什么也做不了，只能连接和登录.有什么建议吗?或任何其他用于自动 FTP TLS 的解决方案?

Using the FileZilla client works fine (download/upload files) but using the Java code I can't do nothing just connect and logon. Any suggestion? or any other solution for a automated FTP TLS?

我的 ftp 对象