Keywords: clamdoc

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## CVD format

CVD (ClamAV Virus Database) is a digitally signed tarball file that contains 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 Sep 2004 21-07 +0200
        Version: 487
        # of signatures: 1189
        Functionality level: 2
        Builder: ccordes
        MD5: a3f4f98694229e461f17d2aa254e9a43
        Digital signature: uwJS6d+y/9g5SXGE0Hh1rXyjZW/PGK/zqVtWWVL3/tfHEn
        A17z6VB2IBR2I/OitKRYzmVo3ibU7bPCJNgi6fPcW1PQwvCunwAswvR0ehrvY/4ks
        UjUOXo1VwQlW7l86HZmiMUSyAjnF/gciOSsOQa9Hli8D5uET1RDzVpoWu/id
        Verification OK.