Algorithm negotiation fail when connect the server

[wdquan1985]

When I execute the following code, there are a Algorithm negotiation fail exception.
Shell shell = new SSH(serverIP, 22, userName, password);
String stdout = new Shell.Plain(shell).exec("echo 'Hello, world!'");

The following is the error info.
java.io.IOException: com.jcraft.jsch.JSchException: Algorithm negotiation fail
at com.jcabi.ssh.SSH.session(SSH.java:272)
at com.jcabi.ssh.AbstractSSHShell.exec(AbstractSSHShell.java:98)
at com.jcabi.ssh.SSH.exec(SSH.java:76)
at com.jcabi.ssh.Shell$Plain.exec(Shell.java:172)
at com.dashboard.service.DeployJobsServiceImpl.getDeployServerInfo(DeployJobsServiceImpl.java:784)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
at com.sun.proxy.$Proxy134.getDeployServerInfo(Unknown Source)
at com.dashboard.service.inter.DeployJobsServiceTest.testGetDeployServerInfo(DeployJobsServiceTest.java:102)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: com.jcraft.jsch.JSchException: Algorithm negotiation fail
at com.jcraft.jsch.Session.receive_kexinit(Session.java:583)
at com.jcraft.jsch.Session.connect(Session.java:320)
at com.jcraft.jsch.Session.connect(Session.java:183)
at com.jcabi.ssh.SSH.session(SSH.java:268)
... 48 more

[0crat]

@yegor256 please, pay attention to this issue

[wdquan1985]

Shell shell = new SSH(serverIP, 22, userName, password);
String stdout = new Shell.Plain(shell).exec("echo 'Hello, world!'");
The password is a private key:
String password= "-----BEGIN RSA PRIVATE KEY-----" + "\n" + "MIIEowIBAAKCAQEA+wQzLRBZB+/2EKdGF+eezckkbz3+ahROnxJr8rx9VhbyQvf3" + "\n" + "T9CQz1mWaY3czdgHFRcESsC1bumfUMxO3z1bkfk/mcWBh9vPS6sRDqb+zj8BypIE" + "\n" + "bOC4YtclKQjH6dJ0avBrENZbcoL0BLN4VHATq/vcxuXNT9/ktXXHxAcahrIMDj/d" + "\n" + "m8CXABzlAdprvLjffjN2aW+IUsvIbNfpaiBHkv2KdV5I4rsQnl5O2GmOkP0Oz/RL" + "\n" + "dD/m+M0/TCvdpbdD+ISekEdA9SvJI1xo3LnojC/wYIylgUR4Ep3tuwcOeiZIiyLj" + "\n" + "iPLsIzelZSOrZAcEVOD2FXQ/iLcScpr/Ry3U9QIDAQABAoIBABGYf8Xe6X7G8WbF" + "\n" + "cwJl+BnQyb8Kh3UEK2a3Md34HIkWXrEXFL0Bj8UZMJQBn8LGK+jsjh53V8CIm+Rc" + "\n" + "DgNUF8Epya2LzMKrQ+K4ASAX0LDAde2vQqQnNIWpMy+nL+xSFlsQs1Cg1hQ23cge" + "\n" + "lIbGvHpH03gVz8iTl0KpGPHC1bcvTGLiLXauahtBK8LOA5odIWVJHv+nj4UrwOmP" + "\n" + "DUtT927PsStemNTZJLvFr2fgG0marEWy/qm0eYh8M7Tg6IwTobkybd8Y6Lm88Pfp" + "\n" + "xy3pjo7q7AYBAJaMjkMAYu7wmO48gR29aKw43VBUrwlIZ2x2A2WoIrlvCXf5q5ai" + "\n" + "8ha6xwECgYEA/ixyHRqenLprcMT6dP5hkijht8T/NZV0LUq5a9+29MjIm++djQTj" + "\n" + "YUVuEeSlDvMa1kzQP3ZjOGhIJKcWsJSxu3GwMHNQ2dooFgnSnB1yrTa4++od3atn" + "\n" + "9bBvnZzMWZ24IEVCnCj/l/CYIN6FE1bWcGRslmbs9w2L2+Y63/gK3xUCgYEA/NHy" + "\n" + "ScM6rPHP0r+eL5NkXnktZXB41uDS3V9rHsmIfKbQhEBxtG4r2lDkBkFAlrPz8rlY" + "\n" + "oYSnHfX0NXGrjb/82fNDCkfTwHO/OujLDGb4E4UVKTz6nfSOyJ8bl9Fa7DSBzvz1" + "\n" + "bmcb7CYHiRjfaxbOSYJeSRTaQ0xL5GSO5Ak1lmECgYB7an1mYFyP4Xz13s92K2aZ" + "\n" + "H7yqDL+W9yDYNSZfmNsvdKbkAK9RoAQAYUQW8Byta6GmWNntVsDKzOfq1C8SQsEi" + "\n" + "MQvKGtQxU9qPCOn439uk+6NKvt0Nm4L5K1inAVHAWfLjyH2VcdrZnftgSmv3ffzV" + "\n" + "yg1n4kZBl5RHjD0eL0SoGQKBgD2Wc1xut7N7sLHZRhK26CNvh5SHgpht6lBNN04n" + "\n" + "sB0VkgQ1or1efUZQoEu5x58utUWyyxmFtCRDTztZtn3wgAskDHfLqZTfXX1fSl96" + "\n" + "EgLHT7FdDnw+IC5VPCaOtISIAftHeg5sBcxQM1O9gGeZBaW4oXlSIB12z6ISsRBy" + "\n" + "AeDhAoGBANIgCmuzvD7Ahyg+E2YUqnbCMpt4wm+gmxaYjhhxREGzz/Dhho0iUNLo" + "\n" + "lsq63mlj29uZlisJRibIyJfdpSsFoECaDC2n/vxHDbun8Ro8yqDIN6tO6PZBRj7u" + "\n" + "7HpdSktQ/usTt1mAU32mkGEvVQAmNiVVqdpdKrW7w2ZH0rYICMKd" + "\n" + "-----END RSA PRIVATE KEY-----";

[wdquan1985]

When I use a URL which define the private key file. the same error.
URL keyUrl = new URL("file:/u/bwang018/.ssh/privateKey");
shell = new SSH(serverIP,22,userName,keyUrl);
String stdout = new Shell.Plain(shell).exec("ifconfig");

[wdquan1985]

If I only use the following dependency which is used by the jcabi project, there is no connection error.
<dependency>
<groupId>com.jcraft</groupId>
<artifactId>jsch</artifactId>
<version>0.1.54</version>
</dependency>

The test code:
JSch jsch = new JSch();
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
jsch.addIdentity( the private key file path);
session=jsch.getSession(userName, host, port);
session.setConfig(config);
session.connect();

[vlohana]

wdquan1985 - As per your above comment
The test code:

JSch jsch = new JSch();
Properties config = new Properties();
config.put("StrictHostKeyChecking", "no");
jsch.addIdentity( the private key file path);
session=jsch.getSession(userName, host, port);
session.setConfig(config);
session.connect();

For JDK_1.8_131 it runs swiftly but when I use version above > JDK_1.8_131 I get this error
Anyone else facing the similar issue.

I even tried updating the /etc/ssh/sshd_config and restarted on the linux machine I want to access but I am still getting the

com.jcraft.jsch.JSchException: Algorithm negotiation fail
   at com.jcraft.jsch.Session.receive_kexinit(Session.java:590)

Can anyone help on this ? please

[yegor256]

@wdquan1985 I don't know what's going on. I think we should report it to jSch and see what they say.

[wdquan1985]

@vlohana @yegor256 ,my java version is:
C:\windows\system32>java -version
java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)

[laurafchen]

same error as @vlohana, anyone have insights

com.jcraft.jsch.JSchException: Algorithm negotiation fail
at com.jcraft.jsch.Session.receive_kexinit(Session.java:590)
at com.jcraft.jsch.Session.connect(Session.java:320)
at com.jcraft.jsch.Session.connect(Session.java:183)

[vlohana]

My Issue got resolved as I did following to resolve

1. Updated JDK to JDK 1.8_161
2. Updated the JCE with Unlimited Strength (googling the same can help)
3. Removed any firewall policy like services iptables stop

That resolved my issue