I wanted to write a Python script to bruteforce hashes that permits the user to insert the hashing algorithm as a string (Result: algorithm = "md5"), but when I tried to use it like this in the hashlib library: guess_hash = hashlib.algorithm(bytes(guess)).hexdigest(), it obviously gave me this error: AttributeError: module 'hashlib' has no attribute 'algorithm'
So I did a quick research and I tried using getattr like this: getattr(hashlib,guess(bytes(guess1))).hexdigest() (probably really wrong) and it gave me this error: TypeError: string argument without an encoding.
What should I do? Thanks in advance and sorry for the noobiness :)
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3 Answers
You missed passing the actual algorithm name to the getattr call.
Try this:
getattr(hashlib, 'md5')(bytes(guess)).hexdigest()
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That's actually bytes complaining (which it will with Python 3 but not Python 2). It would appear that you've also swapped the meanings of algorithm and guess in your getattr, and you'll want to do something like
getattr(hashlib, algorithm)(bytes(guess, 'utf-8')).hexdigest()
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Simple is better than complex. You can just have a bunch of if statements and do the correct call in those. If there are too many, you could use a hashmap where the key is a string and the value a function.
getattr is, however, the correct call to fetch an attribute with a variable, but the error tells you that you cannot convert a string to a bytestring without specifying the encoding. The bytes function allows you to specify encoding like this:
a_byte_string = bytes(a_regular_string, encoding='utf8')