Re: Converting private key from OpenSSH to lsh (or the other way around)

[email protected] (Niels M=C3=B6ller) writes:
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    For PKCS#1 format, the program pkcs1-conv (from nettle-1.14 and
    later) can also convert RSA keys in pkcs#1 formats to sexp format.

Simon Josefsson <[email protected]> writes:

    Then I would think that pkcs1-conv would handle this.

Indeed, I've managed to convert OpenSSH RSA key pair to GNU lsh by the
following steps:

  1. Decrypt OpenSSH key:

     $ openssl rsa -inform PEM -outform DER -in ~/.ssh/id_rsa \
               -out /tmp/id_rsa.nopass

  2. Convert OpenSSH key to GNU lsh:

     $ cat /tmp/id_rsa.nopass | pkcs1-conv --private-rsa-key | \
           sexp-conv -s advanced | sed -e "s/rsa/rsa-pkcs1/" | \
           sexp-conv -s canonical | lsh-writekey

I've done it using GNU lsh version lsh-2.9-exp, secsh protocol version
2.0.

My initial goal -- to use single key pair for both OpenSSH and GNU lsh
-- is achieved.  That way, I can start playing with GNU lsh without
taking the risk to switch completely to it.

Thanks for your help! :-)


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