glaslos/ssdeep

Unclear error 'Apples != Grapes' for HashDistance() for file length of 1344 bytes and file length in range from 193 to 384 bytes

oneumyvakin opened this issue · 1 comments

oneumyvakin commented

STEPS

  1. Create file length of 1344 bytes
  2. Create file length of from 193 to 384 bytes.
  3. Try to calculate HashDistance() of this files:
package main
import (
	"github.com/glaslos/ssdeep"
	"fmt"
)
func main() {
	deepMaingo := ssdeep.NewSSDEEP()
	deepMaingoStr := deepMaingo .Fuzzy("1344text.txt")
	fmt.Printf("'%s'\n", deepMaingoStr)
	deep192 := ssdeep.NewSSDEEP()
	deep192Str := deep192.Fuzzy("193.txt")
	fmt.Printf("'%s'\n", deep192Str )
	distance, err := ssdeep.HashDistance(deepMaingoStr, deep192Str )
	fmt.Printf("Distance: '%d' Error: '%s'\n", distance, err)
}

ACTUAL RESULT

block size: 24, file size: 1344, n/bs: 56
'24:tT0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T0T04:tT0T0T0T0T0T0T0T0T0T0T0T0T0T0T0Y,"1344text.txt"'
block size: 6, file size: 193, n/bs: 32
'6:OWGukOWGukOWGukOWGukOWGukOWGukOWGukOWGukOWGukOWGukOWGukOWGukOWGP:MMMMMMMMMMMMULrOvwOvwOO,"193.txt"'
Distance: '0' Error: 'Apples != Grapes'