in cvm-attestation/src/Encoder.py [0:0]
def base64url_decode(data):
"""
Decode base64url encoded data string to bytes
Parameters:
data (str): The base64url encoded data to be decoded.
Returns:
bytes: The decoded data bytes.
"""
data = data.replace('-', '+').replace('_', '/')
padding = 4 - (len(data) % 4) if (len(data) % 4) else 0
data += "=" * padding
return b64decode(data)