Keywords: clamdoc

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## CVD format

CVD (ClamAV Virus Database) is a digitally signed tarball file that contains one or more databases. You can find some useful information in the ASCII header of the file. It's a 512 bytes long string with the following colon separated fields:

    ClamAV-VDB:build time:version:number of signatures:functionality
    level required:MD5 checksum:digital signature:builder name

and can be easily parsed by scripts or with `sigtool --info`. There are two CVD databases in ClamAV: main.cvd and daily.cvd for daily updates. You can use sigtool to unpack a CVD file (`--unpack`) and to list virus names (`--list-sigs`).