Keywords: clamdoc

## 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:

    $ sigtool -i daily.cvd
    File: daily.cvd
    Build time: 10 Mar 2008 10:45 +0000
    Version: 6191
    Signatures: 59084
    Functionality level: 26
    Builder: ccordes
    MD5: 6e6e29dae36b4b7315932c921e568330
    Digital signature: zz9irc9irupR3z7yX6J+OR6XdFPUat4HIM9ERn3kAcOWpcMFxq
    Fs4toG5WJsHda0Jj92IUusZ7wAgYjpai1Nr+jFfXHsJxv0dBkS5/XWMntj0T1ctNgqmiF
    +RLU6V0VeTl4Oej3Aya0cVpd9K4XXevEO2eTTvzWNCAq0ZzWNdjc
    Verification OK.