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We are using JSch library (jsch-0.1.55.jar) to make connection with SFTP server (Bitvise). I am using the algorithm diffie-hellman-group1-sha1 and it's working fine. But when I use the following algorithms it shows the error

Algorithm negotiation fail

  • curve25519-sha256@libssh.org
  • diffie-hellman-group18-sha512
  • diffie-hellman-group16-sha512
  • diffie-hellman-group14-sha256

Are the above algorithms supported by JSch?

If they are not, Can someone please help with the article or any workaround to resolve the issue?

Martin Prikryl
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Hardik Agrawal
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1 Answers1

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JSch 0.1.55 does not support any of those.

But @mwiede's fork of JSch supports all of them.

Martin Prikryl
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    I've recently switched to this one as well. `camel-sftp` and Red Hat use it, so that gives some more confidence about using "just any" library. – Rob Spoor Sep 27 '22 at 07:09