SSH
-=-
OpenSSH
-------
To generate an OpenSSH sshv2 key

$ ssh-keygen -t dsa -f newkey
Generating public/private dsa key pair.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in newkey.
Your public key has been saved in newkey.pub.
The key fingerprint is:
c6:db:3a:ff:4c:79:a7:d8:cb:be:82:e8:9d:db:8c:e9 brad@eta

To export to ssh.com

$ ssh-keygen -e -f newkey.pub
---- BEGIN SSH2 PUBLIC KEY ----
Comment: "1024-bit DSA, converted from OpenSSH by brad@eta"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---- END SSH2 PUBLIC KEY ----

ssh.com
-------
To generate a key:

$ ssh-keygen
Generating 2048-bit dsa key pair
   1 oOo.oO
Key generated.
2048-bit dsa, marshalb@obelix.cqu.edu.au, Tue Jul 15 2003 13:53:34 +1000
Passphrase :
Again      :
Private key saved to /usr/users/staff/m/marshalb/.ssh2/id_dsa_2048_b
Public key saved to /usr/users/staff/m/marshalb/.ssh2/id_dsa_2048_b.pub

To convert from ssh.com to OpenSSH (using OpenSSH ssh-keygen):

$ ssh-keygen -i -f id_dsa_2048_b.pub
ssh-dss AAAAB3NzaC1kc3MAAAEBAKueha6mfr5OUcscc88lmQUBBgYSZ08htHFaYzke2N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You can then use the output in authorized_keys file on an openssh box.

OpenSSH v2 -> ssh.com v2
------------------------

On the OpenSSH box, create a DSA key via the following:

$ ssh-keygen -t dsa

Export the key into ssh.com v2 format:

$ ssh-keygen -e -f ~/.ssh/id_dsa.pub > newPubKey

Copy the converted ssh key to the ssh.com server

$ scp newPubKey server:.ssh2/id_dsa.pub

On the server, tell the ssh.com server that the public key is allowed:

$ echo "Key id_dsa.pub" >> ~/.ssh2/authorization


ssh.com v2 -> OpenSSH v2
------------------------

On the ssh.com box, generate a DSA key:

$ ssh-keygen

Copy the generated key to the openssh box:

$ scp ~/.ssh2/id_dsa_1024_a.pub server:.ssh

Convert the public key to openssh format and append to authorized_keys:

$ ssh-keygen -i -f id_dsa_1024_a.pub >> ~/.ssh/authorized_keys

On the ssh.com box setup the private key:

$ echo "IdKey id_dsa_1024_a" >> ~/.ssh2/identification

ssh.com v2 -> ssh.com v2
------------------------

On the ssh.com client, generate a DSA key:

$ ssh-keygen

Copy the generated key to the server:

$ scp ~/.ssh2/id_dsa_1024_a.pub server:.ssh2

On the server, tell the ssh.com server that the public key is allowed:

$ echo "Key id_dsa._1024_a.pub" >> ~/.ssh2/authorization

On the ssh.com client setup the private key:

$ echo "IdKey id_dsa_1024_a" >> ~/.ssh2/identification

OpenSSH v2 -> OpenSSH v2
------------------------

On the OpenSSH box, create a DSA key via the following:

$ ssh-keygen -t dsa

Copy the ssh key to the server

$ scp ~/.ssh/id_dsa.pub server:.ssh/id_dsa.pub

Add the key to the authorized_keys file on the server

$ cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys