Keywords: clamdoc

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## CVD format

CVD (ClamAV Virus Database) is a digitally signed tarball containing one or more databases. The header is a 512-bytes long string with colon separated fields:

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

`sigtool --info` displays detailed information on CVD files:

    zolw@localhost:/usr/local/share/clamav$ sigtool -i daily.cvd
    Build time: 11 Feb 2007 19-28 +0000
    Version: 2553
    # of signatures: 6063
    Functionality level: 9
    Builder: ccordes
    MD5: 7f337b409249e11dea3effb04dd352f2
    Digital signature: 6Ybd2eeDHBAs8raaEwmayqzoa5ysGDNnQ5Cc89mS2VCm1jRXZP
    ke/itmkTyYQTc/rgJc2uQPr+NvzvUxRpsniwoyZ/gIkPniCLnqVCYOOytwtmirivbrV8j
    0kzxb9nHd+5UQqj/Z3rLbS7T5HCbRX3uE0JX1tAo642Gq9ACH9Fc
    Verification OK.