mirror of https://github.com/r4sas/py-i2phosts
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62 lines
2.1 KiB
62 lines
2.1 KiB
#!/usr/bin/env python2.6 |
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import re |
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from django import forms |
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from web.postkey.models import i2phost |
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def validate_hostname(data): |
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""" |
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Here we do additional hostname validation as described in |
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http://www.i2p2.i2p/naming.html |
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""" |
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# convert hostname to lowercase |
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data = data.lower() |
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# Must end with '.i2p'. |
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if re.match(r'.*\.i2p$', data) == None: |
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raise forms.ValidationError('Hostname doesn\'t ends with .i2p') |
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# Base 32 hostnames (*.b32.i2p) are not allowed |
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if re.match(r'.*\.b32\.i2p$', data): |
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raise forms.ValidationError('Base 32 hostnames are not allowed') |
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# Must contain only [a-z] [0-9] '.' and '-' |
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h = re.match(r'([a-z0-9.-]+)\.i2p$', data) |
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if h == None: |
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raise forms.ValidationError('Illegal characters in hostname') |
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else: |
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namepart = h.groups()[0] |
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# Must not contain '..' |
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if re.search(r'\.\.', namepart): |
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raise forms.ValidationError('".." in hostname') |
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# Must not contain '.-' or '-.' (as of 0.6.1.33) |
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if re.search(r'(\.-)|(-\.)', namepart): |
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raise forms.ValidationError('Hostname contain ".-" or "-."') |
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# Must not contain '--' except in 'xn--' for IDN |
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if re.search(r'(?<!^xn)--', namepart): |
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raise forms.ValidationError('Hostname contain "--" and it\'s not an IDN') |
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# Certain hostnames reserved for project use are not allowed |
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if re.search(r'(^|\.)(proxy|router|console)$', namepart): |
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raise forms.ValidationError('Trying to use reserved hostname') |
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return data |
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def validate_b64hash(data, check_uniq=True): |
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""" |
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Base64 hash validation |
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""" |
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length = len(data) |
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# Minimum key length 516 bytes |
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if length < 516: |
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raise forms.ValidationError('Specified base64 hash are less than 516 bytes') |
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# keys with cert may ends with anything, so check is relaxed |
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if length > 516 and re.match(r'[a-zA-Z0-9\-~]+$', data) == None: |
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raise forms.ValidationError('Invalid characters in base64 hash') |
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# base64-i2p |
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if length == 516 and re.match(r'[a-zA-Z0-9\-~]+AA$', data) == None: |
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raise forms.ValidationError('Invalid base64 hash') |
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if check_uniq == True: |
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# Avoid adding non-unique hashes |
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qs = i2phost.objects.filter(b64hash=data) |
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if qs.exists(): |
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raise forms.ValidationError('Base64 hash must be unique') |
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return data
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