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searching and replacing strings with magic characters in fil

 
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Ludwig
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Joined: 10 Jan 2016
Posts: 59

PostPosted: Tue Apr 25, 2017 12:40 pm    Post subject: searching and replacing strings with magic characters in fil Reply with quote

Good day...
ive got a minor issue in a de-obfuscating//renaming script im working on...
basically, it takes the As bytecode..reads the files into arrays..then searches the files<arrays> which is in memory for certain strings to be replaced
example of a file array with some line arrays..<each line a seperate array>
Code:
cinit
  refid "-_--------_-_-/class/init"
  body
   maxstack 4
   localcount 1
   initscopedepth 3
   maxscopedepth 4
   code
    getlocal0
    pushscope

    findproperty        QName(PrivateNamespace("*", "-_--------_-_-/class"), "_giftsAccepted")
    newarray            0
    setproperty         QName(PrivateNamespace("*", "-_--------_-_-/class"), "_giftsAccepted")

    findproperty        QName(PrivateNamespace("*", "-_--------_-_-/class"), "---_-_-___--_")
    pushbyte            255
    setproperty         QName(PrivateNamespace("*", "-_--------_-_-/class"), "---_-_-___--_")

    findproperty        QName(PrivateNamespace("*", "-_--------_-_-/class"), "-__-_-_-___-__")
    pushnull
    setproperty         QName(PrivateNamespace("*", "-_--------_-_-/class"), "-__-_-_-___-__")

    findproperty        QName(PrivateNamespace("*", "-_--------_-_-/class"), "_enterFrameResource")
    findpropstrict      QName(PackageNamespace(""), "xxxdb62fe1f6f224638b6024282874b1661")
    getlex              QName(PrivateNamespace("*", "-_--------_-_-/class"), "-_-_---__--__--")
    getlex              QName(PackageNamespace(""), "xxxf45bdca742ea4188a74161fa94ccf864")
    getproperty         QName(PackageNamespace(""), "----_--___----")
    constructprop       QName(PackageNamespace(""), "xxxdb62fe1f6f224638b6024282874b1661"), 2
    setproperty         QName(PrivateNamespace("*", "-_--------_-_-/class"), "_enterFrameResource")

    returnvoid
   end ; code
  end ; body
   


now...search strings examples:
"_enterFrameResource"
"xxxf45bdca742ea4188a74161fa94ccf864"
"-__-_-_-___-__"

which i usaly use newstring=gsub(linearray, search, replace)
works great for most of the strings, but the moment it contains magic characters like "-__-_-_-___-__" it can give me strange replaces...
example:
a:5 of:6338 aa:11 of searches:2268 "------_---_--_" searchin: "-_-____--_-_-_-" replacing: "xxx6873d62edc8546d3b2bdf395b7498800"
original
getproperty QName(PackageNamespace(""), "-_--_-______-")
new
getproperty QName(PackageNamespace(""), "-_--_-"xxx6873d62edc8546d3b2bdf395b7498800")


it found the wrong search string..because of the"-" characters in the search and replace strings, and then did an incorrect replace...
i understand i have to use % as escape..but how to implement it in different length line array string, search strings, and replace strings?
regards
ludwig

--edit--
fixed..by using the c, d = string.find(file_array_b_rab[at][rr],read,1,true)
command, it searches the string in plain format, and returns start and end position of found string,,then by using string.sub, it can be replased
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