33 lines
827 B
Python
33 lines
827 B
Python
# March 2022
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# Hesham T. Banafa <hishaminv@gmail.com>
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import os
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from hashlib import pbkdf2_hmac
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PASS_ENCODING='utf-8'
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HASH_FUNC='sha256'
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NUM_ITIRATIONS=100000
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def get_new_salt(n_bytes : int = 32) -> bytes:
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if type(n_bytes) != int:
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n_bytes = 32 # Forece in case of misuse
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return os.urandom(n_bytes)
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def gen_new_key(plain_passwd : str) -> tuple:
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"""
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Generate a new key and salt to store.
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Returns (key, salt)
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"""
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salt = get_new_salt(32)
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return (calc_key(plain_passwd, salt), salt)
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def verify_key(plain_passwd : str, salt : bytes, stored_key : bytes) -> bool:
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key_tmp = calc_key(plain_passwd, salt)
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return (stored_key == key_tmp)
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def calc_key(passwd: str, salt : bytes) -> bytes:
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return pbkdf2_hmac(HASH_FUNC, passwd.encode(PASS_ENCODING), salt, NUM_ITIRATIONS)
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