Use SSHTool to convert Putty Private Key to OpenSSH private key

In my java project I create a SSH tunnel with a server. The tunnel is authenticated currently using a putty private key and plink. Does anybody know how to use 开发者_StackOverflowthe java SSHTool library to either convert a putty key to a openssh key or use SSHTool library to create a ssh tunnel using a putty key? Thank you.

Jsch only accepts opensh keys, not the format that putty creates the keys in. You would have to convert them. Use puttygen.exe to convert to openssh, then use the openssh keyfile in jsch.