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When i try to convert SSH2 RSA format based private key to .pem format, using openssl i am getting the below error.

[jbadmin@xxxxxxx .ssh2]$ openssl req -x509 -key /home/jbadmin/.ssh2/id_rsa_2048_a -nodes -days 365 -newkey rsa:2048 -out id_rsa_2048_a.pem
unable to load Private Key
139994671441736:error:0906D06C:PEM routines:PEM_read_bio:no start line:pem_lib.c:703:Expecting: ANY PRIVATE KEY

My Private Key:

[jbadmin@xxxxxx.ssh2]$ cat id_rsa_2048_a
---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----
Subject: jbadmin
Comment: "2048-bit rsa, jbadmin@x01bicallapp1a, Tue Dec 29 2015 11:38:\
----------------------------
----------------------------
---- END SSH2 ENCRYPTED PRIVATE KEY ----

Please suggest me if there is any other way of doing it using openssl or ssh-keygen-g3

EDIT1: Tried below option, still same issue

[jbadmin@x01bicallapp1a .ssh2]$ openssl rsa -outform PEM -in /home/jbadmin/.ssh2/id_rsa_2048_a -out /home/jbadmin/.ssh2/id_rsa_2048_a.pem
unable to load Private Key
140493432293192:error:0906D06C:PEM routines:PEM_read_bio:no start line:pem_lib.c:703:Expecting: ANY PRIVATE KEY
  • PEM is an encoding format for keys - both DSA and RSA can use it. Also openssl req is for creating a Certificate Signing Request (CSR). You want something more like: openssl rsa --outform PEM --in /home/jbadmin/.ssh2/id_rsa_2048_a -out /home/jbadmin/.ssh2/id_rsa_2048_a.pem – darklion Jan 4 '16 at 9:57
  • It seems that neither openssl or ssh-keygen can convert the private key (the latter can convert the public). A quick read of unix.stackexchange.com/questions/84060/… suggests that it might be possible using puttygen. – garethTheRed Jan 4 '16 at 15:24
  • @garethTheRed, Thanks for providing a useful link, unfortunately puttygen and ssh-keygen options are not available on our server. finally i managed to do it using ssh-keygen-g3. – Uppicharla Jan 5 '16 at 3:21
  • That's excellent news. Answering your own question is encouraged on this site, so you should edit your post to remove your solution and add it as an answer instead. You never know, you may gain some points for it :-) – garethTheRed Jan 5 '16 at 7:24
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Solution: I used the below command to get it worked

$ ssh-keygen-g3 --key-format openssh2  --import-private-key /home/jbadmin/.ssh2/id_rsa_2048_a /home/jbadmin/.ssh2/id_rsa_2048_a_openssh.pem
Imported private key in /home/jbadmin/.ssh2/id_rsa_2048_a to /home/jbadmin/.ssh2/id_rsa_2048_a_openssh.pem.

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