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25 lines
845 B
Python
25 lines
845 B
Python
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#!/usr/bin/python3
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# Updates subresource integrity attributes in management/templates/index.html
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# to prevent CDN-hosted resources from being used as an attack vector. Run this
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# after updating the Bootstrap and jQuery <link> and <script> to compute the
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# appropriate hash and insert it into the template.
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import re, urllib.request, hashlib, base64
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fn = "management/templates/index.html"
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with open(fn, 'r') as f:
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content = f.read()
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def make_integrity(url):
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resource = urllib.request.urlopen(url).read()
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return "sha256-" + base64.b64encode(hashlib.sha256(resource).digest()).decode('ascii')
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content = re.sub(
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r'<(link rel="stylesheet" href|script src)="(.*?)" integrity="(.*?)"',
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lambda m : '<' + m.group(1) + '="' + m.group(2) + '" integrity="' + make_integrity(m.group(2)) + '"',
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content)
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with open(fn, 'w') as f:
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f.write(content)
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