31 lines
866 B
Python
31 lines
866 B
Python
import hashlib
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import binascii
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class HashDerivedKey:
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@staticmethod
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def from_hex(hex_str):
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return HashDerivedKey(bytes(bytearray.fromhex(hex_str)))
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def __init__(self, master):
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def ensure_bytes(b):
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assert isinstance(b, bytes)
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return b
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ensure_bytes(master)
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def derive(seed):
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ensure_bytes(seed)
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sha = hashlib.sha256()
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sha.update(master)
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sha.update(seed)
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return sha.digest()
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hex = lambda b: binascii.hexlify(b).decode("utf-8")
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self.master = master
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self.master_hex = lambda: hex(master)
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self.derive = derive
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self.derive_hex = lambda seed: hex(derive(seed))
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def derive_metadata(self,seed):
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key = self.derive(seed)
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return (key,{"key_seed": binascii.hexlify(seed).decode("utf-8")})
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