Java: InvalidAlgorithmParameterException Prime size must be multiple of 64

Question

I implemented a Java program that will connect and execute a command in a remote server using JSCH. The problem is that whenever I tried to connect to the server, I got the

Answer 1

I was getting the same error with JGit's use of JSch. I tried a lot of suggestions in this thread to no avail.

But then recently, I noticed that if I used a slightly newer jre than I used before, the error went away.

Just for the record, I was using "jsch-0.1.55.jar" and the two jre's I tried were:

• JRE 1.7.0_80 (experienced the exception)
• JRE 1.8.0_191 (made the problem go away)

I can't say for sure whether it was merely the JRE upgrade that resolved the problem or the suggested tweaks from this thread that I made in addition.

All the same, just wanted to share the experience in case it helps someone else.