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FE+BE: fake MAC standardization (FA:CE) #1344

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Signed-off-by: jokob-sk <jokob.sk@gmail.com>
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jokob-sk
2025-12-30 09:56:23 +11:00
parent 30294ef9bc
commit eb125a84fe
2 changed files with 22 additions and 8 deletions
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24
server/utils/crypto_utils.py
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@@ -72,11 +72,25 @@ def generate_deterministic_guid(plugin, primary_id, secondary_id):
return str(uuid.UUID(hashlib.md5(data).hexdigest()))
def string_to_mac_hash(input_string):
# Calculate a hash using SHA-256
# -------------------------------------------------------------------------------
def string_to_fake_mac(input_string):
"""
Generate a deterministic fake MAC address from an input string.
The MAC address is hex-valid and begins with a FA:CE prefix
to clearly indicate it is synthetic.
Args:
input_string (str): The input string to hash into a MAC address.
Returns:
str: A MAC address string in the format 'fa:ce:xx:xx:xx:xx'.
"""
# Calculate a SHA-256 hash of the input string
sha256_hash = hashlib.sha256(input_string.encode()).hexdigest()
# Take the first 12 characters of the hash and format as a MAC address
mac_hash = ':'.join(sha256_hash[i:i + 2] for i in range(0, 12, 2))
# Take characters 4–11 (next 4 bytes) to form the rest of the MAC address
rest = ':'.join(sha256_hash[i:i + 2] for i in range(4, 12, 2))
return mac_hash
# Prepend the FA:CE prefix to clearly mark this as a fake MAC
return f"fa:ce:{rest}"