scp DH key size error

[imholzj]

tSCPConnection is giving this warning then exception when connecting to a server. Any advice for me to debug?

[WARN ] 16:14:28 org.apache.sshd.client.session.ClientSessionImpl- exceptionCaught(ClientSessionImpl[serviceaccount@server])[state=Opened] InvalidAlgorithmParameterException: DH key size must be multiple of 64, and can only range from 512 to 8192 (inclusive). The specific key size 4095 is not supported

Exception in component tSCPConnection_2 (ENC_SCPcopyToHomeroom5)

org.apache.sshd.common.SshException: DefaultAuthFuture[ssh-connection]: Failed (InvalidAlgorithmParameterException) to execute: DH key size must be multiple of 64, and can only range from 512 to 8192 (inclusive). The specific key size 4095 is not supported

at org.apache.sshd.common.future.AbstractSshFuture.lambda$verifyResult$1(AbstractSshFuture.java:145)

jji

[Anonymous]

Hello,

Here is an article about: https://stackoverflow.com/questions/52115621/java-security-invalidalgorithmparameterexception-dh-key...

Let us know if it helps.

Best regards

Sabrina

[imholzj]

Thanks, that got me closer.

I think the problem is connecting to an older Solaris system, and it doesn't look like Java cares. I haven't tried alternative security provider yet.

https://github.com/rundeck/rundeck/issues/2705

Is it reasonable to install BouncyCastle?