60 lines
1.7 KiB
Python
60 lines
1.7 KiB
Python
import re
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import string
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from unidecode import unidecode
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INVALID_PASSWORD_MESSAGE = 'Invalid password, password must be at least ' + \
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'8 characters and contain no whitespace.'
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INVALID_USERNAME_CHARACTERS = r'[^a-z0-9_]'
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VALID_CHARACTERS = '_' + string.digits + string.lowercase
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MIN_LENGTH = 4
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MAX_LENGTH = 30
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def validate_email(email_address):
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if re.match(r'[^@]+@[^@]+\.[^@]+', email_address):
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return True
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return False
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def validate_username(username):
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# Based off the restrictions defined in the Docker Registry API spec
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regex_match = (re.search(INVALID_USERNAME_CHARACTERS, username) is None)
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if not regex_match:
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return (False, 'Username must match expression [a-z0-9_]+')
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length_match = (len(username) >= MIN_LENGTH and len(username) <= MAX_LENGTH)
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if not length_match:
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return (False, 'Username must be between %s and %s characters in length' %
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(MIN_LENGTH, MAX_LENGTH))
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return (True, '')
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def validate_password(password):
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# No whitespace and minimum length of 8
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if re.search(r'\s', password):
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return False
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return len(password) > 7
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def _gen_filler_chars(num_filler_chars):
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if num_filler_chars == 0:
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yield ''
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else:
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for char in VALID_CHARACTERS:
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for suffix in _gen_filler_chars(num_filler_chars - 1):
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yield char + suffix
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def generate_valid_usernames(input_username):
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normalized = unidecode(input_username).strip().lower()
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prefix = re.sub(INVALID_USERNAME_CHARACTERS, '_', normalized)[:30]
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num_filler_chars = max(0, MIN_LENGTH - len(prefix))
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while num_filler_chars + len(prefix) <= MAX_LENGTH:
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for suffix in _gen_filler_chars(num_filler_chars):
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yield prefix + suffix
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num_filler_chars += 1
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