Golang : Frobnicate or tweaking a string example



Tags : golang hex embed-include-data executable-binary-file secret-text-string utf8

A simple example of how to frobnicate(tweaking) a string with UTF-8 characters. Useful in obscuring plain text in embedded in executable binary file if you do not want the text to be visible to someone viewing your executable file with a hex editor. To achieve that, first frobnicate the text first into a obfuscated(frobnicated) text and then use the frobnicate function again on the obfuscated text during runtime to convert to readable text.

Here you go!


 package main

 import (
  "fmt"
  "strings"
  "unicode"
  "unicode/utf8"
 )

 // frobnicate/tweak a string
 func frobnicate(input string) string {
  var result []string

  for _,i := range input {
 switch {
 case unicode.IsSpace(i):
 result = append(result, " ")
 // uncomment to frob the digits
 //case unicode.IsNumber(i):
 // result = append(result, string(rune(i)))
 case utf8.ValidRune(i):
 result = append(result, string(rune(i) ^ 42))
 }

  }

  return strings.Join(result,"")
 }


 func main() {
  text := "жѳМѭњЂЯёЧВ 一二三 handle alphabets = ขอพฮศโำฐเฦ abc世界你好123 ペツワケザユプルヂザ"
  fmt.Println(text)
  fmt.Println(frobnicate(text))

  fmt.Println("Invertible test:")
  fmt.Println(frobnicate(frobnicate(text)))
 }

References:

https://www.socketloop.com/tutorials/golang-rot32768-rotate-by-0x80-utf-8-strings-example

https://www.techopedia.com/definition/27996/frobnicate

  See also : Golang : Embed secret text string into binary(executable) file



Tags : golang hex embed-include-data executable-binary-file secret-text-string utf8

By Adam Ng

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