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Manual Reference Pages  -  TARSNAP-RECRYPT (1)

NAME

tarsnap-recrypt - re-encrypts data stored using tarsnap(1).

CONTENTS

Synopsis
Description
Examples

SYNOPSIS

tarsnap-recrypt --oldkey old-key-file --oldcachedir old-cache-dir --newkey new-key-file --newcachedir new-cache-dir tarsnap-recrypt --version

DESCRIPTION

tarsnap-recrypt downloads and decrypts data using old-key-file and re-encrypts and uploads it using new-key-file. After all the data has been re-uploaded, tarsnap-recrypt deletes the data using old-key-file so that the only remaining copy of the data is encrypted using new-key-file. The key file new-key-file must have been generated by tarsnap-keyregen(1) with old-key-file.

tarsnap-recrypt checkpoints its progress after every 1-2 GB of data that it has copied; if it is interrupted it can be re-run and it will attempt to continue.

Note that after tarsnap-recrypt completes it will be possible to store more archives using the key old-key-file and the cache directory old-cache-dir so care should be taken to disable any automatic (e.g., cron(8)) archiving while tarsnap-recrypt is run.

EXAMPLES

The following sequence of commands will create new keys and re-encrypt data, assuming that the currently used keys are in /root/tarsnap.key and the current cache directory is /usr/local/tarsnap-cache:

    tarsnap-keyregen--keyfile /root/tarsnap.key.new--oldkey /root/tarsnap.key--user me@example.com--machine myserver

    --oldkey /root/tarsnap.key--oldcachedir /usr/local/tarsnap-cache--newkey /root/tarsnap.key.new--newcachedir /usr/local/tarsnap-cache.new

    rm-r /usr/local/tarsnap-cache

    mv /usr/local/tarsnap-cache.new /usr/local/tarsnap-cache

    rm /root/tarsnap.key

    mv /root/tarsnap.key.new /root/tarsnap.key

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