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24 lines
620 B
Python
24 lines
620 B
Python
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"""
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Functions to normalize various inputs
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"""
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import hashlib
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def generate_system_username(username):
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"""
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Generate a posix username from given username.
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If username < 26 char, we just return it.
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Else, we hash the username, truncate username at
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26 char, append a '-' and first add 5char of hash.
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This makes sure our usernames are always under 32char.
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"""
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if len(username) < 26:
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return username
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userhash = hashlib.sha256(username.encode('utf-8')).hexdigest()
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return '{username_trunc}-{hash}'.format(
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username_trunc=username[:26],
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hash=userhash[:5]
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)
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