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60 lines
1.7 KiB
Python
60 lines
1.7 KiB
Python
from fido2.webauthn import AttestedCredentialData
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import random
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import string
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import secrets
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import math
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def verify(MC, GA, client_data_hash):
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credential_data = AttestedCredentialData(MC.auth_data.credential_data)
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GA.verify(client_data_hash, credential_data.public_key)
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def generate_random_user():
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# https://www.w3.org/TR/webauthn/#user-handle
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user_id_length = random.randint(1, 64)
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user_id = secrets.token_bytes(user_id_length)
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# https://www.w3.org/TR/webauthn/#dictionary-pkcredentialentity
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name = "User name"
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icon = "https://www.w3.org/TR/webauthn/"
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display_name = "Displayed " + name
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return {"id": user_id, "name": name, "icon": icon, "displayName": display_name}
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counter = 1
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def generate_user_maximum():
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"""
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Generate RK with the maximum lengths of the fields, according to the minimal requirements of the FIDO2 spec
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"""
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global counter
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# https://www.w3.org/TR/webauthn/#user-handle
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user_id_length = 64
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user_id = secrets.token_bytes(user_id_length)
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# https://www.w3.org/TR/webauthn/#dictionary-pkcredentialentity
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name = ''.join(random.choice(string.ascii_uppercase + string.ascii_lowercase + string.digits) for _ in range(64))
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name = f"{counter}: {name}"
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icon = "https://www.w3.org/TR/webauthn/" + "A" * 128
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display_name = "Displayed " + name
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name = name[:64]
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display_name = display_name[:64]
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icon = icon[:128]
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counter += 1
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return {"id": user_id, "name": name, "icon": icon, "displayName": display_name}
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def shannon_entropy(data):
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s = 0.0
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total = len(data)
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for x in range(0, 256):
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freq = data.count(x)
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p = freq / total
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if p > 0:
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s -= p * math.log2(p)
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return s
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