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47 lines
1.3 KiB
Python
Executable File
47 lines
1.3 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# Copyright (C) 2020 Kaspar Schleiser <kaspar@schleiser.de>
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# 2020 Inria
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# 2020 Freie Universität Berlin
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#
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# This file is subject to the terms and conditions of the GNU Lesser
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# General Public License v2.1. See the file LICENSE in the top level
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# directory for more details.
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#
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import os
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import sys
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from cryptography.hazmat.primitives.asymmetric.ed25519 import Ed25519PrivateKey
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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 NoEncryption
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from cryptography.hazmat.primitives.serialization import BestAvailableEncryption
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def main():
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if len(sys.argv) < 2:
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print("usage: gen_key.py <secret filename> [password]")
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sys.exit(1)
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if len(sys.argv) > 2:
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pw = str.encode(sys.argv[2])
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crypt = BestAvailableEncryption(pw)
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else:
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crypt = NoEncryption()
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pk = Ed25519PrivateKey.generate()
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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(os.open(sys.argv[1], os.O_CREAT | os.O_EXCL | os.O_WRONLY, 0o600), "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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