密码“aes256-cbc”是必需的，但不可用

java ssh jsch

2022-08-31 22:40:25

我正在尝试使用JSch做一个SFTP，但我遇到了一些错误：

com.jcraft.jsch.JSchException：密码'aes256-cbc'是必需的，但它不可用。

以下是我使用的代码。我错过了什么吗？

JSch jsch = new JSch();
Session session = null;

jsch.addIdentity("C:\\privatekey.ppk", "Password");

session = jsch.getSession("user", "54.251.240.234", 22);
session.setConfig("StrictHostKeyChecking", "no");


Channel channel = session.openChannel("sftp");
channel.connect();
ChannelSftp sftpChannel = (ChannelSftp) channel;
sftpChannel.put("C:\\Users\\test.txt", "/home/user/test.txt");
sftpChannel.exit();
session.disconnect();

堆栈跟踪

[8/30/13 1:56:26:556 SGT] 00000021 SystemErr     R com.jcraft.jsch.JSchException: The cipher 'aes256-cbc' is required, but it is not available.
[8/30/13 1:56:26:557 SGT] 00000021 SystemErr     R  at com.jcraft.jsch.KeyPair.loadPPK(KeyPair.java:1017)
[8/30/13 1:56:26:557 SGT] 00000021 SystemErr     R  at com.jcraft.jsch.KeyPair.load(KeyPair.java:590)
[8/30/13 1:56:26:557 SGT] 00000021 SystemErr     R  at com.jcraft.jsch.KeyPair.load(KeyPair.java:542)
[8/30/13 1:56:26:557 SGT] 00000021 SystemErr     R  at com.jcraft.jsch.IdentityFile.newInstance(IdentityFile.java:40)
[8/30/13 1:56:26:558 SGT] 00000021 SystemErr     R  at com.jcraft.jsch.JSch.addIdentity(JSch.java:389)
[8/30/13 1:56:26:558 SGT] 00000021 SystemErr     R  at com.jcraft.jsch.JSch.addIdentity(JSch.java:370)
[8/30/13 1:56:26:558 SGT] 00000021 SystemErr     R  at com.belsize.sb.SB_UtilityBean.runExternalProgram_Windows(SB_UtilityBean.java:1134)
[8/30/13 1:56:26:558 SGT] 00000021 SystemErr     R  at com.belsize.sb.EJSLocal0SLSB_Utility_861cc9f0.runExternalProgram_Windows(EJSLocal0SLSB_Utility_861cc9f0.java)
[8/30/13 1:56:26:558 SGT] 00000021 SystemErr     R  at com.belsize.sb.SB_IntegrationBean.getFTP_Status(SB_IntegrationBean.java:2175)
[8/30/13 1:56:26:559 SGT] 00000021 SystemErr     R  at com.belsize.sb.EJSLocal0SLSB_Integration_13682180.getFTP_Status(EJSLocal0SLSB_Integration_13682180.java)
[8/30/13 1:56:26:559 SGT] 00000021 SystemErr     R  at pagecode.module.user_permission.W_useraccount.getFTP_Status(W_useraccount.java:992)
[8/30/13 1:56:26:559 SGT] 00000021 SystemErr     R  at pagecode.module.user_permission.Up1006.doUp1006_commandlink_testftpAction(Up1006.java:711)
[8/30/13 1:56:26:559 SGT] 00000021 SystemErr     R  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[8/30/13 1:56:26:560 SGT] 00000021 SystemErr     R  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)
[8/30/13 1:56:26:560 SGT] 00000021 SystemErr     R  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
[8/30/13 1:56:26:560 SGT] 00000021 SystemErr     R  at java.lang.reflect.Method.invoke(Method.java:611)
[8/30/13 1:56:26:560 SGT] 00000021 SystemErr     R  at org.apache.el.parser.AstValue.invoke(AstValue.java:268)
[8/30/13 1:56:26:560 SGT] 00000021 SystemErr     R  at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278)
[8/30/13 1:56:26:561 SGT] 00000021 SystemErr     R  at org.apache.myfaces.view.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:83)
[8/30/13 1:56:26:561 SGT] 00000021 SystemErr     R  at javax.faces.component._MethodExpressionToMethodBinding.invoke(_MethodExpressionToMethodBinding.java:88)
[8/30/13 1:56:26:561 SGT] 00000021 SystemErr     R  at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:100)
[8/30/13 1:56:26:561 SGT] 00000021 SystemErr     R  at javax.faces.component.UICommand.broadcast(UICommand.java:120)
[8/30/13 1:56:26:561 SGT] 00000021 SystemErr     R  at javax.faces.component.UIViewRoot._broadcastAll(UIViewRoot.java:973)
[8/30/13 1:56:26:562 SGT] 00000021 SystemErr     R  at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:275)
[8/30/13 1:56:26:562 SGT] 00000021 SystemErr     R  at javax.faces.component.UIViewRoot._process(UIViewRoot.java:1285)
[8/30/13 1:56:26:562 SGT] 00000021 SystemErr     R  at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:711)
[8/30/13 1:56:26:562 SGT] 00000021 SystemErr     R  at org.apache.myfaces.lifecycle.InvokeApplicationExecutor.execute(InvokeApplicationExecutor.java:34)
[8/30/13 1:56:26:562 SGT] 00000021 SystemErr     R  at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:171)
[8/30/13 1:56:26:563 SGT] 00000021 SystemErr     R  at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
[8/30/13 1:56:26:563 SGT] 00000021 SystemErr     R  at javax.faces.webapp.FacesServlet.service(FacesServlet.java:189)
[8/30/13 1:56:26:563 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1225)
[8/30/13 1:56:26:563 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:775)
[8/30/13 1:56:26:564 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:457)
[8/30/13 1:56:26:564 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178)
[8/30/13 1:56:26:564 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.filter.WebAppFilterChain.invokeTarget(WebAppFilterChain.java:136)
[8/30/13 1:56:26:564 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:97)
[8/30/13 1:56:26:564 SGT] 00000021 SystemErr     R  at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:77)
[8/30/13 1:56:26:564 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
[8/30/13 1:56:26:565 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
[8/30/13 1:56:26:565 SGT] 00000021 SystemErr     R  at com.belsize.servlet.filter.RedirectLogin.doFilter(RedirectLogin.java:177)
[8/30/13 1:56:26:565 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195)
[8/30/13 1:56:26:565 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91)
[8/30/13 1:56:26:565 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:928)
[8/30/13 1:56:26:565 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1025)
[8/30/13 1:56:26:566 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:87)
[8/30/13 1:56:26:566 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:908)
[8/30/13 1:56:26:566 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1662)
[8/30/13 1:56:26:566 SGT] 00000021 SystemErr     R  at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:195)
[8/30/13 1:56:26:566 SGT] 00000021 SystemErr     R  at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:453)
[8/30/13 1:56:26:566 SGT] 00000021 SystemErr     R  at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:515)
[8/30/13 1:56:26:567 SGT] 00000021 SystemErr     R  at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:306)
[8/30/13 1:56:26:567 SGT] 00000021 SystemErr     R  at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83)
[8/30/13 1:56:26:567 SGT] 00000021 SystemErr     R  at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:166)
[8/30/13 1:56:26:567 SGT] 00000021 SystemErr     R  at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
[8/30/13 1:56:26:567 SGT] 00000021 SystemErr     R  at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
[8/30/13 1:56:26:568 SGT] 00000021 SystemErr     R  at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
[8/30/13 1:56:26:568 SGT] 00000021 SystemErr     R  at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
[8/30/13 1:56:26:568 SGT] 00000021 SystemErr     R  at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
[8/30/13 1:56:26:568 SGT] 00000021 SystemErr     R  at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
[8/30/13 1:56:26:568 SGT] 00000021 SystemErr     R  at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1691)

答案 1

当您的私钥采用腻子格式而不是开放式 ssh 格式时，也会出现此错误。

您可以使用工具 puttygen 将密钥转换为开放式 ssh 格式的私钥。

这为我解决了问题。在我的情况下，没有必要用netbeans 8.0.2和Java 8_25替换Java文件。

答案 2

默认情况下，JCE 策略（随 JDK 或 JRE 附带）不支持诸如（ase-256,.. 等）之类的加密技术。

当然，您必须将当前的JCE jars（存在于$JAVA_HOME/jre/lib/security上）替换为您从oracle网站获得的兼容Jave版本。

下载链接：

对于 JDK 1.6：https://www.oracle.com/java/technologies/jce-6-download.html

对于 JDK 1.7：https://www.oracle.com/java/technologies/javase-jce7-downloads.html

对于 JDK 1.8：https://www.oracle.com/java/technologies/javase-jce8-downloads.html

这将解决问题。