Tor-gencert (1) Linux Manual Page

tor-gencert – Generate certs and keys for Tor directory authorities

Synopsis

tor-gencert [-h|–help] [-v] [-r|–reuse] [–create-identity-key] [-i id_file] [-c cert_file] [-m num] [-a address:port]

Description

tor-gencert generates certificates and private keys for use by Tor directory authorities running the v3 Tor directory protocol, as used by Tor 0.2.0 and later. If you are not running a directory authority, you don’t need to use tor-gencert.

Every directory authority has a long term authority identity key (which is distinct from the identity key it uses as a Tor server); this key should be kept offline in a secure location. It is used to certify shorter-lived signing keys, which are kept online and used by the directory authority to sign votes and consensus documents.

After you use this program to generate a signing key and a certificate, copy those files to the keys subdirectory of your Tor process, and send Tor a SIGHUP signal. DO NOT COPY THE IDENTITY KEY.

Options

-v

Display verbose output.

-h or –help

Display help text and exit.

-r or –reuse

Generate a new certificate, but not a new signing key. This can be used to change the address or lifetime associated with a given key.

–create-identity-key

Generate a new identity key. You should only use this option the first time you run tor-gencert; in the future, you should use the identity key that’s already there.

-i FILENAME

Read the identity key from the specified file. If the file is not present and –create-identity-key is provided, create the identity key in the specified file. Default: "./authority_identity_key"

-s FILENAME

Write the signing key to the specified file. Default: "./authority_signing_key"

-c FILENAME

Write the certificate to the specified file. Default: "./authority_certificate"

-m NUM

Number of months that the certificate should be valid. Default: 12.

–passphrase-fd FILEDES

Filedescriptor to read the passphrase from. Ends at the first NUL or newline. Default: read from the terminal.

-a address:port

If provided, advertise the address:port combination as this authority’s preferred directory port in its certificate. If the address is a hostname, the hostname is resolved to an IP before it’s published.

Bugs

This probably doesn’t run on Windows. That’s not a big issue, since we don’t really want authorities to be running on Windows anyway.

Authors

Roger Dingledine <arma [at] mit.edu>, Nick Mathewson <nickm [at] alum.mit.edu>.

Author

Nick Mathewson

Author.

tor-gencert (1) Linux Manual Page