Files

fuzzPatternCreate.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+   "fmt"
+   "gopkg.in/alecthomas/kingpin.v2"
+   "bytes"
+)
+
+func main() {
+   charCountPointer:= kingpin.Arg("char-count", "Number of characters to generate").Required().Int()
+   kingpin.Parse()
+
+   var charCount int=*charCountPointer
+   var ans bytes.Buffer
+   var tempCombi string
+   var combiArr [4]int
+   charsetCaps := "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+   charsetSmall := "abcdefgjijklmnopqrustuvwxyz"
+   charsetNum := "0123456789"
+
+   for ans.Len()<charCount {
+      tempCombi=string(charsetCaps[combiArr[0]]) + string(charsetSmall[combiArr[1]]) + string(charsetSmall[combiArr[2]]) + string(charsetNum[combiArr[3]])
+      if ans.Len()+len(tempCombi) < charCount {
+         ans.WriteString(tempCombi)
+      } else  {
+         ans.WriteString(tempCombi[:charCount-ans.Len()])
+      }
+
+      addCombi(combiArr[:])
+   }
+
+   fmt.Println(ans.String())
+}
+
+func addCombi(combiArr []int) {
+   combiMax := [4]int{26, 26, 26, 10}
+
+   combiArr[len(combiArr)-1]+=1
+
+   for i:= len(combiArr)-1; i>0; i-- {
+      if combiArr[i] >= combiMax[i] {
+         combiArr[i] = 0
+         combiArr[i-1] += 1
+      }
+   }
+
+   if combiArr[0] >= combiMax[0] {
+      combiArr[0] = 0
+   }
+}

fuzzPatternSearch.go

@@ -0,0 +1,103 @@
+package main
+
+import (
+   "fmt"
+   "gopkg.in/alecthomas/kingpin.v2"
+   "encoding/hex"
+   "strings"
+   "os"
+)
+
+func main() {
+   patternPointer:= kingpin.Arg("search", "Hex(eg '0x42424242') or String to be search").Required().String()
+   pattLengthPointer:= kingpin.Flag("length", "Pattern length").Short(rune('l')).Int()
+   kingpin.Parse()
+
+   var fullPattern string
+   var pattern string
+   var combiArr []int = []int{0,0,0,0}
+   combiMax := []int{26, 26, 26, 10}
+   var fullCombi int
+   charsetCaps := "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+   charsetSmall := "abcdefgjijklmnopqrustuvwxyz"
+   charsetNum := "0123456789"
+   pattLength := *pattLengthPointer
+   finalPos := 0
+   var startPos int
+
+   if len(*patternPointer)<4 {
+      fmt.Println("Input must have at least 4 bytes")
+      os.Exit(0)
+   }
+
+   if (*patternPointer)[:2] == "0x" {
+      fmt.Println("Hex detected")
+      fullBytes, _ := hex.DecodeString((*patternPointer)[2:])
+      fullPattern = string(fullBytes)
+   } else  {
+      fullPattern = *patternPointer
+   }
+
+   if len(fullPattern)<4 {
+      fmt.Println("Input must have at least 4 bytes")
+      os.Exit(0)
+   }
+
+   pattern = fullPattern[:4]
+
+   for i:=0; i<len(pattern); i++ {
+      if strings.Contains(charsetCaps, string(pattern[i])) {
+         startPos = i
+      }
+   }
+
+   //find combi
+   combiArr[0]=strings.IndexByte(charsetCaps, pattern[(startPos+0)%4])
+   combiArr[1]=strings.IndexByte(charsetSmall, pattern[(startPos+1)%4])
+   combiArr[2]=strings.IndexByte(charsetSmall, pattern[(startPos+2)%4])
+   combiArr[3]=strings.IndexByte(charsetNum, pattern[(startPos+3)%4])
+
+   finalPos = findPos(combiArr, startPos)
+
+   if pattLength == 0 {
+      fmt.Println("Pattern found:",finalPos)
+   } else {
+      fullCombi = combiMax[0] * combiMax[1] * combiMax[2] * combiMax[3]
+      fmt.Println("Full cycle:", fullCombi,"*", len(combiArr), "=", fullCombi*len(combiArr))
+      fmt.Println("")
+
+      for finalPos < pattLength {
+         fmt.Println("Pattern found:",finalPos)
+         finalPos+=fullCombi*len(combiArr)
+      }
+   }
+}
+
+func findPos(combiArr []int, startPos int) int {
+   combiMax := []int{26, 26, 26, 10}
+   permuteCombi := []int{10*26*26, 26*10, 10, 1}
+
+   var answerLength int
+
+   if startPos > 0 {
+      combiArr[len(combiArr)-1]+=1
+
+      for i:= len(combiArr)-1; i>0; i-- {
+         if (combiArr[i] >= combiMax[i]) && (i >= (len(combiArr)-startPos)) {
+            combiArr[i] = 0
+            if (i-1 >= (len(combiArr)-startPos)) {
+               combiArr[i-1] += 1
+            }
+         }
+      }
+   }
+
+   for i:=0; i<len(combiArr); i++ {
+      answerLength += combiArr[i] * permuteCombi[i]
+   }
+
+   answerLength = answerLength * len(combiArr)
+   answerLength -= startPos
+
+   return answerLength
+}