OPENPGP2SSH(1) BSD General Commands Manual OPENPGP2SSH(1)NAMEopenpgp2ssh — translate OpenPGP keys to SSH keys
SYNOPSISopenpgp2ssh < mykey.gpg
gpg --export $KEYID | openpgp2ssh $KEYID
gpg --export $KEYID | openpgp2pem $KEYID
gpg --export $KEYID | openpgp2spki $KEYID
gpg --export-secret-key $KEYID | openpgp2ssh $KEYID
DESCRIPTIONopenpgp2ssh takes an OpenPGP-formatted primary key and associated subkeys
on standard input, and spits out the requested equivalent SSH-style (or
PEM-encoded) key on standard output.
If the data on standard input contains no subkeys, you can invoke
openpgp2ssh without arguments. If the data on standard input contains
multiple keys (e.g. a primary key and associated subkeys), you must spec‐
ify a specific OpenPGP key identifier as the first argument to indicate
which key to export. The key ID is normally the 40 hex digit OpenPGP
fingerprint of the key or subkey desired, but openpgp2ssh will accept as
few as the last 8 digits of the fingerprint as a key ID.
If the input contains an OpenPGP RSA public key, it will be converted to
the OpenSSH-style single-line keystring, prefixed with the key type
(`ssh-rsa'). This format is suitable (with minor alterations) for inser‐
tion into known_hosts files and authorized_keys files. If invoked as
`openpgp2pem', a PEM-encoded public key will be emitted instead.
If invoked as `openpgp2spki', a PEM-encoded subjectPublicKeyInfo (as
defined in the X.509 standard) will be emitted instead.
If the input contains an OpenPGP RSA secret key, it will be converted to
the equivalent PEM-encoded private key.
openpgp2ssh is part of the monkeysphere(7) framework for providing a PKI
for SSH.
CAVEATS
The keys produced by this process are stripped of all identifying infor‐
mation, including certifications, self-signatures, etc. This is inten‐
tional, since ssh attaches no inherent significance to these features.
openpgp2ssh will produce output for any requested RSA key. This means,
among other things, that it will happily export revoked keys, unverifi‐
able keys, expired keys, etc. Make sure you do your own key validation
before using this tool!
EXAMPLES
gpg --export-secret-key $KEYID | openpgp2ssh $KEYID | ssh-add -c
/dev/stdin
This pushes the secret key into the active ssh-agent(1). Tools such as
ssh(1) which know how to talk to the ssh-agent(1) can now rely on the
key.
AUTHORopenpgp2ssh and this man page were written by Daniel Kahn Gillmor
<dkg@fifthhorseman.net>.
BUGSopenpgp2ssh only works with RSA keys. DSA keys are the only other key
type available in both OpenPGP and SSH, but they are currently unsup‐
ported by this utility.
openpgp2ssh only accepts raw OpenPGP packets on standard input. It does
not accept ASCII-armored input. openpgp2ssh Currently only exports into
formats used by the OpenSSH. It should support other key output formats,
such as those used by lsh(1) and putty(1).
Secret key output is currently not passphrase-protected.
openpgp2ssh currently cannot handle passphrase-protected secret keys on
input.
SEE ALSOpem2openpgp(1), monkeysphere(1), monkeysphere(7), ssh(1),
monkeysphere-authentication(8), monkeysphere-host(8)BSD April 28, 2024 BSD
