Hi Ike,
I think you can use either J2SSH Maverick or opensource J2SSH API to do that.
1) J2SSH Maverick: http://www.sshtools.co.uk/en/j2ssh-maverick/Use this 
method: http://www.sshtools.co.uk/content/developer/maverick/docs/com/sshtools/publickey/SshPrivateKeyFileFactory.html#convertFile(java.io.File,
 java.lang.String, java.lang.String, int, java.io.File)
2) Opensource 
J2SSH: http://sourceforge.net/projects/sshtools/Class com.sshtools.j2ssh.transport.publickey.SshPrivateKeyFile
 seems to work for you:- First, use method parse(File) to read the SSHTOOLS 
private key- Then, use method setFormat(SshPrivateKeyFormat, String) to export 
the private key to new format (OpenSSH)
Hope they work for you.
Viet

--- On Tue, 2/15/11, Ike Ikonne <iiko...@us.ibm.com> wrote:

From: Ike Ikonne <iiko...@us.ibm.com>
Subject: Re: [JSch-users] How to convert SSHTOOL private key to OpenSSH format
To: "Viet H. Phan" <hoangvietp...@yahoo.com>
Cc: jsch-users@lists.sourceforge.net
Date: Tuesday, February 15, 2011, 11:51 PM

Hi Viet,



Thanks so much in your response; okay,
here is the deal, I have a private key in the following format



--- BEGIN SSHTOOLS ENCRYPTED PRIVATE KEY
---- 

Comment: 1024-bit dsa 

Subject: xxxx 

AAAACDNERVMtQ0JDGKeSLe6w6YcAAAFQkSiSE3yNQCGHBRJ8FFURPW6VsFil6s5TcPilj8PzZeeq


tHvTFVIQNz+JTwZc5Hg5j5DJadrApHgq4FfU+iMDG0oWQmVIFKKYQFNrPBPo/LRgYyZNvqGCTjuW


yq3BtBmYwV0+xlJ26lh00cUkwnjO2R+1aerm7rHBTD6RQzrnY1juv0OwTtHxTCSIyUQVYFQ7CUnB


KZGliSClsx6sAs6pgvqbvV16Wx2KHXfT8CED/qyY2Zey3hns6xvG/FnaLtZsombRv3VeZsiZCRqu


KfACsG8Slvx9gEnmNo1szkh2yhFBMgwLa7h/ZE6LcInbKGXzZ6CgI5mR0sN+5caQoAu4+5I6t9H3


q8qcs5Ymlo5FTA2aMof3K67m+l1sfv0ajVt8W5RI1MZflP0WOHh0Hj3keiFMZ4y34bayoMHgIBsh


NW1P7BVoZnghDJOPsAKjBIkQ 

---- END SSHTOOLS ENCRYPTED PRIVATE KEY ----






We are looking for a solution to
convert it to the OpenSSH format below; when we try to import the above
using

puttygen, we get an error which
states that the above is not a valid private key. So, we want the above
to be converted

to the format below.  Does
anyone have an idea on how to go about doing it?





-----BEGIN RSA PRIVATE KEY-----


Proc-Type: 4,ENCRYPTED 

DEK-Info: DES-EDE3-CBC,F1B37BF733792B7B




r+MyRcscd21Rn7zUfUV1g8tYgc02ep+svhG3zli4hIcXAyV0dtZ8xk83PaUh5GI+


Ym18eZmlKzQJQMD6FqOgqIuu1BDhjyupO6+vrVZGyYiZWiwIaPVFlR+wEoOPdjXP


dWahB71/0MU7ESBlK1j6p5lzST7R4ziJBKJ/kbpr/qko1k1MBDWsXVhzlufzuLcV


IqBESaOPhNeyY0D4nVEAzNX3nhbwFMy+4mX7Q3GxofULpmbAeNrk1lWSjKSY5Fd4


zpT6cyzceQN0KZUP7TwPbqI4MyjM2MnJ+VHu4U4gZi6UmdJ8ghawrEhdmyGuW7Ei


Oh5o1cD0FMPVhrPJKrmFlLhQZVtcqmqCw7POTj1pHlWzt1WWH4kEWNI9M0BBtHqe


DZ8YDcNc8deDECxoZQKWL8yJoKttreain1Se0azpgWOOQzBK2nxC0rOV0cJjEsxt


kiOQD2RrxKJJCi698SBpD2DG0APIZni9GzTh2A0rOJL++DYsUv/2bjkJOeUu/25E


u5mHE493VJMTOKCMPC9BMUzq1tEQ6GaR6xtOdQYr/yq+ZP747ZmaR5Qdu/r+tmBh


AHyEZLwIEwSgny9hZYkXHMXIleqfcumazQq+cs7F/d7UF6hN9usy/1zY3pO42q1k


0QQJoWlE73qAYyvdsYWCdzy3VXD9aQQDLSayLOmRgyO46DIPl3FGa0Kcjd6+oBGr


HqYmtvgOE4qOSaS3BIvNzlf+TblKZSRRteaTMHoYTjKhpSCPzkjellGMemRsEnrZ


MGOL6tmAgZYzviwo5wHSlnlzNn7TQ8DGjnV6RReCZsQ=


-----END RSA PRIVATE KEY-----












From:      
 "Viet H. Phan"
<hoangvietp...@yahoo.com>

To:      
 Ike Ikonne/Dallas/IBM@IBMUS

Cc:      
 jsch-users@lists.sourceforge.net

Date:      
 02/14/2011 10:06 PM

Subject:    
   Re: [JSch-users]
How to convert SSHTOOL private key to OpenSSH format











Hi,



Do you want manual or automatic conversion? If manual
conversion is acceptable to you, you just import the ssh.com private keys
to PuTTYgen,
then export it to OpenSSH format.

Hope I understand your requirements correctly :-).



Regards,

Viet



--- On Tue, 2/15/11, Ike Ikonne <iiko...@us.ibm.com>
wrote:



From: Ike Ikonne <iiko...@us.ibm.com>

Subject: Re: [JSch-users] How to convert SSHTOOL private key to OpenSSH
format

To: "Viet H. Phan" <hoangvietp...@yahoo.com>

Cc: jsch-users@lists.sourceforge.net

Date: Tuesday, February 15, 2011, 10:57 AM



Hi Thanks for your prompt response,
but puttygen doesn't work, I tried it.  Again


I am trying to convert private kyes generated via SSHTOOL to OpenSSH format.




Thanks, 



Ike 







From:        "Viet
H. Phan" <hoangvietp...@yahoo.com> 

To:        jsch-users@lists.sourceforge.net,
Ike Ikonne/Dallas/IBM@IBMUS 

Date:        02/14/2011
09:46 PM 

Subject:        Re:
[JSch-users] How to convert SSHTOOL private key to OpenSSH format












Hi, 



You can use PuTTYgen tool
to do that. 

Download the tool from here: 
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html




Regards, 

Viet 





--- On Tue, 2/15/11, Ike Ikonne <iiko...@us.ibm.com>
wrote: 



From: Ike Ikonne <iiko...@us.ibm.com>

Subject: [JSch-users] How to convert SSHTOOL private key to OpenSSH format

To: jsch-users@lists.sourceforge.net

Date: Tuesday, February 15, 2011, 12:26 AM



Hi all,



We have just recently migrated from SSHTOOL to jsch toolkit; one problem
that we are running into 

is how to still let our customers/users make use of private keys generated
using the SSHTOOL. 

Jsch can't handle these keys generated via SSSHTOOL.  I am trying
to find out if there is any solution 

that we can deploy to help make jsch able to handle these keys generated
using SSHTOOL.  Any suggestions 

will be highly appreciated. 



Thanks, 



Ike 



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The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE:
Pinpoint memory and threading errors before they happen.
Find and fix more than 250 security defects in the development cycle.
Locate bottlenecks in serial and parallel code that limit performance.
http://p.sf.net/sfu/intel-dev2devfeb
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