ipsec_showhostkey - show host's authentication key
ipsec showhostkey [--verbose] {--version | --list | --dump | --left | --right | --ipseckey}
[--ckaid ckaid | --rsaid rsaid]
[--gateway gateway] [--precedence precedence]
[--nssdir nssdir] [--password password]
Showhostkey outputs (on standard output) a public key suitable for this host, in the format specified, using the host key information stored in the NSS database.
In general, since only the super-user can access the NSS database, only the super-user can display the public key information.
--version
Print the libreswan version, then exit.
--verbose
Increase the verbosity.
--nssdir nssdir
Specify the libreswan directory that contains the NSS database (default /etc/ipsec.d).
--password password
Specify the password to use when accessing the NSS database (default contained in /etc/ipsec.d/nsspassword).
--list
List the private keys.
--dump
List, with more details, the private keys.
--ckaid ckaid
Select the public key to display using the NSS ckaid.
--rsaid rsaid
Select the public key to display using the RSA key ID.
--left, --right
Print the selected public key in ipsec.conf(5) format, as a leftrsasigkey or rightrsasigkey parameter respectively. For example, --left might give (with the key data trimmed down for clarity):
leftrsasigkey=0sAQOF8tZ2...+buFuFn/
--ipseckey
Print the selected public key in a format suitable for use as opportunistic-encryption DNS IPSECKEY record format (RFC 4025). A gateway can be specified with the --gateway, which currently supports IPv4 and IPv6 addresses. For the host name, the value returned by gethostname is used, with a . appended.
For example, --ipseckey --gateway 10.11.12.13 might give (with the key data trimmed for clarity):
IN IPSECKEY 10 1 2 10.11.12.13 AQOF8tZ2...+buFuFn/"
--gateway gateway
For --ipseckey, specify the gateway to display with the DNS IPSECKEY record.
--precedence precedence
For --ipseckey, specify the precedence to display with the DNS IPSECKEY record.
A complaint about “no pubkey line found” indicates that the host has a key but it was generated with an old version of FreeS/WAN and does not contain the information that showhostkey needs.
/etc/ipsec.d, /etc/ipsec.d/nsspassword
ipsec.conf(5), ipsec rsasigkey(8) ipsec newhostkey(8)
Written for the Linux FreeS/WAN project <m[blue]https://www.freeswan.orgm[]> by Henry Spencer. Updated by Paul Wouters for the IPSECKEY format.
Arguably, rather than just reporting the no-IN-KEY-line-found problem, showhostkey should be smart enough to run the existing key through rsasigkey with the --oldkey option, to generate a suitable output line.
Paul Wouters
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