Method randUniqueStr

bashfuscator/core/engine/random.py:158–200

Generate a random string that is guaranteed to be unique. :param minStrLen: minimum length of generated string :type minStrLen: int :param maxStrLen: maximum length of generated string :type maxStrLen: int :param charList: list of characters that wil

(self, minStrLen=None, maxStrLen=None, charList=None, escapeChars="", noBOBL=True)

        return randomVar

    def randUniqueStr(self, minStrLen=None, maxStrLen=None, charList=None, escapeChars="", noBOBL=True):
        """
        Generate a random string that is guaranteed to be unique.

        :param minStrLen: minimum length of generated string
        :type minStrLen: int
        :param maxStrLen: maximum length of generated string
        :type maxStrLen: int
        :param charList: list of characters that will be used when
            generating the random string. If it is not specified, the
            default character set will be used
        :type charList: str or list of chrs
        :returns: unique random string

        .. note::
            Runtime will increase incrementally as more and more unique
            strings are generated, unless
            :meth:`~RandomGen.forgetUniqueStrs` is called.
        """
        minStrLen, maxStrLen = self._getSizes(minStrLen, maxStrLen)

        if charList is None:
            charList = RandomGen._randStrCharList

        commonStrNum = 0

        while True:
            randStr = self.randGenStr(minStrLen, maxStrLen, charList, escapeChars, noBOBL)

            if randStr not in RandomGen._uniqueRandStrs:
                break
            else:
                commonStrNum += 1
                # if 5 collisions are generated in a row, chances are that we are reaching the upper bound
                # of our keyspace, so make the keyspace bigger so we can keep generating unique strings
                if commonStrNum == 5:
                    minStrLen = maxStrLen
                    maxStrLen += 1
                    commonStrNum = 0

        RandomGen._uniqueRandStrs.add(randStr)

        return randStr

    def randGenStr(self, minStrLen=None, maxStrLen=None, charList=None, escapeChars="", noBOBL=True):
        """