IPSEC_SHOWHOSTKEY(8)

NAME
ipsec_showhostkey - show host's authentication key

SYNOPSIS

ipsec showhostkey [--ipseckey] [--left] [--right] [--dump] [--verbose] [--version] [--list] [--gateway gateway] [--precedence precedence] [--dhclient] [--file secretfile] [--keynum count] [--id identity]

DESCRIPTION

Showhostkey outputs (on standard output) a public key suitable for this host, in the format specified, using the host key information stored in /etc/ipsec.secrets. In general only the super-user can run this command, since only he can read ipsec.secrets.

The --left and --right options cause the output to be in ipsec.conf(5) format, as a leftrsasigkey or rightrsasigkey parameter respectively. Generation information is included if available. For example, --left might give (with the key data trimmed down for clarity):

      # RSA 2048 bits   xy.example.com   Sat Apr 15 13:53:22 2000
      leftrsasigkey=0sAQOF8tZ2...+buFuFn/

The --ipseckey option causes the output to be in opportunistic-encryption DNS IPSECKEY record format (RFC 4025). A gateway can be specified with the --gateway, which currently supports IPv4 and IPv6 addresses. The host name is the one included in the key information (or, if that is not available, the output of hostname --fqdn), 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/"

The --version option causes the version of the binary to be emitted, and nothing else.

The --verbose may be present one or more times. Each occurance increases the verbosity level.

The --dhclient option cause the output to be suitable for inclusion in dhclient.conf(5) as part of configuring WAVEsec. See <http://www.wavesec.org>.

Normally, the default key for this host (the one with no host identities specified for it) is the one extracted. The --id option overrides this, causing extraction of the key labeled with the specified identity, if any. The specified identity must exactly match the identity in the file; in particular, the comparison is case-sensitive.

There may also be multiple keys with the same identity. All keys are numbered based upon their linear sequence in the file (including all include directives)

The --file option overrides the default for where the key information should be found, and takes it from the specified secretfile.

DIAGNOSTICS

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.

FILES

/etc/ipsec.secrets

SEE ALSO

ipsec.secrets(5), ipsec.conf(5), ipsec_rsasigkey(8)

HISTORY

Written for the Linux FreeS/WAN project <http://www.freeswan.org> by Henry Spencer. Updated by Paul Wouters for the IPSECKEY format.

BUGS

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.

The --id option assumes that the identity appears on the same line as the : RSA { that begins the key proper.