CODEWITHSUNDEEP
sshssh-keysopenssh
jerle78
jerle78

Reputation: 157

DSA vs RSA: how can you tell

Does anyone have a tool to use in order to differentiate an RSA public key vs a DSA public key? I have two SSH .pub files and i need to know if they're RSA or DSA.

Upvotes: 4

Views: 8429

Answers (2)

user1338062
user1338062

Reputation: 12735

You can use ssh-keygen to get a fingerprint and type out of a .pub file:

ssh-keygen -lf id_rsa.pub

Upvotes: 3

onteria_
onteria_

Reputation: 70487

As noted in the other answer, since the file is in SSH.COM format, you can convert to openssh format and just open the file to check for ssh-dsa or ssh-rsa:

To convert your SSH.COM key to OpenSSH format use:

ssh-keygen -i -f ssh_key.pub

From the ssh-keygen manpage

 -i   This option will read an unencrypted private (or public) key
      file in SSH2-compatible format and print an OpenSSH
      compatible private (or public) key to stdout.  ssh-keygen
      also reads the `SECSH Public Key File Format'.  This option
      allows importing keys from several commercial SSH
      implementations.
 -f  Specifies the filename of the key file.

Source: http://landru.uwaterloo.ca/cgi-bin/wiki.pl?OpenSSH_-_SSH.Com_Interoperability

Upvotes: 1

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