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39 lines
1.2 KiB
Python
39 lines
1.2 KiB
Python
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#!/usr/bin/env python3
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#
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# Copyright (C) 2021_ML!PA Consulting GmbH
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#
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import sys
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import os
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from cryptography.hazmat.primitives.serialization import Encoding
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from cryptography.hazmat.primitives.serialization import PrivateFormat
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from cryptography.hazmat.primitives.serialization import BestAvailableEncryption
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from cryptography.hazmat.primitives import serialization
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def main():
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if len(sys.argv) < 2:
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print(f"usage: {os.path.basename(sys.argv[0])} <password> <key .pem file>")
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sys.exit(1)
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if len(sys.argv) > 1:
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file = sys.argv[2]
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with open(file, "rb") as key_file:
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pk = serialization.load_pem_private_key(key_file.read(),
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password=None,
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)
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pw = str.encode(sys.argv[1])
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crypt = BestAvailableEncryption(pw)
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pem = pk.private_bytes(encoding=Encoding.PEM,
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format=PrivateFormat.PKCS8,
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encryption_algorithm=crypt,
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)
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with open(file, "wb") as f:
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f.write(pem)
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if __name__ == '__main__':
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main()
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