mirror of
https://gitlab.com/pulsechaincom/staking-deposit-cli.git
synced 2025-01-10 13:01:22 +00:00
46 lines
1.6 KiB
Python
46 lines
1.6 KiB
Python
from typing import Any
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from Crypto.Hash import (
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SHA256 as _sha256,
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SHA512 as _sha512,
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)
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from Crypto.Protocol.KDF import (
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scrypt as _scrypt,
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HKDF as _HKDF,
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PBKDF2 as _PBKDF2,
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)
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from Crypto.Cipher import (
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AES as _AES
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)
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def SHA256(x: bytes) -> bytes:
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return _sha256.new(x).digest()
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def scrypt(*, password: str, salt: str, n: int, r: int, p: int, dklen: int) -> bytes:
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if n >= 2**(128 * r / 8):
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raise ValueError("The given `n` should be less than `2**(128 * r / 8)`."
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f"\tGot `n={n}`, r={r}, 2**(128 * r / 8)={2**(128 * r / 8)}")
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res = _scrypt(password=password, salt=salt, key_len=dklen, N=n, r=r, p=p)
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return res if isinstance(res, bytes) else res[0] # PyCryptodome can return Tuple[bytes]
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def PBKDF2(*, password: bytes, salt: bytes, dklen: int, c: int, prf: str) -> bytes:
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if 'sha' not in prf:
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raise ValueError(f"String 'sha' is not in `prf`({prf})")
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_hash = _sha256 if 'sha256' in prf else _sha512
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res = _PBKDF2(password=password, salt=salt, dkLen=dklen, count=c, hmac_hash_module=_hash) # type: ignore
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return res if isinstance(res, bytes) else res[0] # PyCryptodome can return Tuple[bytes]
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def HKDF(*, salt: bytes, IKM: bytes, L: int, info: bytes=b'') -> bytes:
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res = _HKDF(master=IKM, key_len=L, salt=salt, hashmod=_sha256, context=info)
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return res if isinstance(res, bytes) else res[0] # PyCryptodome can return Tuple[bytes]
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def AES_128_CTR(*, key: bytes, iv: bytes) -> Any:
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if len(key) != 16:
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raise ValueError(f"The key length should be 16. Got {len(key)}.")
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return _AES.new(key=key, mode=_AES.MODE_CTR, initial_value=iv, nonce=b'')
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