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import re |
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from spike.model import db |
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from shlex import shlex |
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from spike.model.naxsi_rules import NaxsiRules |
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from flask import url_for |
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class NaxsiWhitelist(db.Model): |
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__bind_key__ = 'rules' |
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__tablename__ = 'naxsi_whitelist' |
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id = db.Column(db.Integer, primary_key=True) |
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wid = db.Column(db.String, nullable=False) |
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mz = db.Column(db.String(1024), nullable=False) |
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negative = db.Column(db.Integer, nullable=False, server_default='0') |
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active = db.Column(db.Integer, nullable=False, server_default='1') |
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timestamp = db.Column(db.Integer, nullable=False) |
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whitelistset = db.Column(db.String(1024), nullable=False) |
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def __init__(self, wid='0', mz='', active=0, negative=0, whitelistset='', timestamp=0): |
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self.wid = wid |
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self.mz = mz |
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self.active = active |
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self.negative = negative |
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self.whitelistset = whitelistset |
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self.timestamp = timestamp |
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self.warnings = [] |
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self.error = [] |
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def __str__(self): |
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return 'BasicRule {}wl:{} "mz:{}";'.format('negative ' if self.negative else ' ', self.wid, self.mz) |
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def __validate_id(self, wid): |
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if not re.match(r'(\-?\d+,)*\-?\d+', wid): |
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self.error.append('Illegal character in the whitelist id.') |
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return False |
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self.wid = wid |
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return True |
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def __validate_mz(self, mz): |
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# Borrow '__validate_matchzone' from naxsi_rules.py ? |
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self.mz = mz |
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return True |
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def parse(self, str_wl): |
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self.warnings = list() |
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self.error = list() |
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lexer = shlex(str_wl) |
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lexer.whitespace_split = True |
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split = list(iter(lexer.get_token, '')) |
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for piece in split: |
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if piece == ';': |
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continue |
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elif piece.startswith(('"', "'")) and (piece[0] == piece[-1]): # remove (double-)quotes |
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piece = piece[1:-1] |
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if piece == 'BasicRule': |
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continue |
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elif piece.startswith('wl:'): |
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self.__validate_id(piece[3:]) |
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elif piece.startswith('mz:'): |
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self.__validate_mz(piece[3:]) |
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elif piece == 'negative': |
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self.negative = True |
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else: |
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self.error.append('Unknown fragment: {}'.format(piece)) |
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return False |
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if 'BasicRule' not in split: |
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self.error.append("No 'BasicRule' keyword in {}".format(str_wl)) |
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return False |
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return True |
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def validate(self): |
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return True |
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def explain(self): |
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def __linkify_rule(rid): |
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if NaxsiRules.query.filter(NaxsiRules.sid == self.wid).first() is None: |
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return rid |
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return '<a href="{}">{}</a>'.format(url_for('rules.view', sid=rid), self.wid) |
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if self.wid == '0': |
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ret = 'Whitelist all rules' |
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elif self.wid.isdigit(): |
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ret = 'Whitelist the rule {}'.format(__linkify_rule(self.wid)) |
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else: |
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zones = list() |
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for rid in self.wid.split(','): |
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if rid.startswith('-'): |
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zones.append('except the rule {}'.format(__linkify_rule(rid[1:]))) |
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else: |
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zones.append('the rule {}'.format(__linkify_rule(rid))) |
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ret = 'Whitelist '+ ', '.join(zones) |
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if not self.mz: |
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return ret + '.' |
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return ret + ' if matching in {}.'.format(self.mz) |
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nbs-system /
spike
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If a method does not access any attributes of the class, it could also be implemented as a function or static method. This can help improve readability. For example
could be written as