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29 lines
877 B
29 lines
877 B
# from https://gist.github.com/flatz/3f242ab3c550d361f8c6d031b07fb6b1
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import os
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import json
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from Crypto.Protocol.KDF import PBKDF2
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from Crypto.Hash import SHA1
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from Crypto.Cipher import AES
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from Crypto.Util.Padding import unpad
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def aes_decrypt_cbc(key, iv, data):
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cipher = AES.new(key, AES.MODE_CBC, iv)
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return cipher.decrypt(data)
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prefix = b'v11'
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salt = 'saltysalt'
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derived_key_len = 128 // 8
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num_iterations = 1003
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iv = b' ' * 16
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def decrypt_encrypted_key(password, encrypted_key):
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encrypted_key = bytes.fromhex(encrypted_key)
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assert encrypted_key.startswith(prefix)
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encrypted_key = encrypted_key[len(prefix):]
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kek = PBKDF2(password, salt, dkLen = derived_key_len, count = num_iterations, hmac_hash_module = SHA1)
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decrypted_key = unpad(aes_decrypt_cbc(kek, iv, encrypted_key), block_size = 16).decode('ascii')
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print('0x' + decrypted_key)
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