Mask generation function: Difference between revisions

Revision as of 08:15, 9 September 2019

Revision as of 13:07, 26 November 2019

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=== Example Codecode ===

Below is pythonPython code implementing MGF1:

<source lang="python">

import hashlib

def i2osp(integer: int, size: int = 4) -> str:

return ''.join([chr((integer >> (8 * i)) & 0xFF) for i in reversed(range(size))])

def mgf1(inputinput_str: str, length: int, hash=hashlib.sha1) -> str:

counter = 0

output = ''

while (len(output) < length):

C = i2osp(counter, 4)

output += hash(inputinput_str + C).digest()

counter += 1

return output[:length]

</source>

Example outputs of MGF1:

<source lang="pythonpycon">

Python 2.7.6 (default, Sep 9 2014, 15:04:36)

[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)] on darwin