[root@localhost clamav-yara]# go test -v
# _/root/clamav-yara
./definitions_test.go:41:3: Errorf format %s has arg def.Level of wrong type int
./definitions_test.go:45:3: Errorf format %s has arg def.TotalSignatures of wrong type int64
./definitions_test.go:49:3: Errorf format %s has arg def.Version of wrong type int
FAIL    _/root/clamav-yara [build failed]
[root@localhost clamav-yara]# ./clamav-yara
2020/03/09 01:32:16 Downloading main definitions from https://sec51.com/definitions/main.cvd ...
2020/03/09 01:32:17 Download completed, proceeding with parsing.
panic: runtime error: slice bounds out of range [512:162]

goroutine 1 [running]:
main.extractFiles(0xc000184600, 0xa2, 0x200, 0x0, 0x0, 0x200, 0x0)
        /root/clamav-yara/definitions.go:296 +0xb0e
main.(*DefinitionsManager).DownloadDefinitions(0xc000062600, 0x0, 0x0, 0x0)
        /root/clamav-yara/definitions.go:237 +0x42d
main.downloadDefinitions(0xc000062600)
        /root/clamav-yara/main.go:30 +0x34
main.main()
        /root/clamav-yara/main.go:19 +0x84

[root@localhost clamav-yara]# go version
go version go1.14 linux/amd64

// Extract the file tar.gz
func extractFiles(data []byte, fileType definitionType) (map[definitionExtensionType]definitionFile, error) {

	files := make(map[definitionExtensionType]definitionFile)

	// extract the data only and cut the header off
	tarGzip := data[512:]

wget http://database.clamav.net/main.cvd
wget https://raw.githubusercontent.com/mattulm/volgui/master/tools/clamav_to_yara.py
sigtool -u main.cvd
./clamav_to_yara.py -f main.ndb -o clamav.yara