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48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
import os.path
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from sys import exit
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from cryptography.hazmat.backends import default_backend
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from cryptography.hazmat.primitives import serialization
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from cryptography.hazmat.primitives.asymmetric import ec
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# Simple tool to generate an ECDSA private key using the secp256k1 curve and save private and public keys
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# as 'pisa_sk.pem' 'and pisa_pk.pem', respectively.
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FILE_NAME_PRIV = 'pisa_sk.pem'
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FILE_NAME_PUB = 'pisa_pk.pem'
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def save_sk(sk, filename):
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pem = sk.private_bytes(
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encoding=serialization.Encoding.PEM,
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format=serialization.PrivateFormat.TraditionalOpenSSL,
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encryption_algorithm=serialization.NoEncryption()
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)
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with open(filename, 'wb') as pem_out:
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pem_out.write(pem)
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def save_pk(pk, filename):
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pem = pk.public_bytes(
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encoding=serialization.Encoding.PEM,
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format=serialization.PublicFormat.SubjectPublicKeyInfo
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)
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with open(filename, 'wb') as pem_out:
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pem_out.write(pem)
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if __name__ == '__main__':
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if os.path.exists(FILE_NAME_PRIV):
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print("A key with name \"{}\" already exists. Aborting.".format(FILE_NAME_PRIV))
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exit(1)
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sk = ec.generate_private_key(
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ec.SECP256K1, default_backend()
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)
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pk = sk.public_key()
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save_sk(sk, FILE_NAME_PRIV)
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save_pk(pk, FILE_NAME_PUB)
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print("Saved private key \"{}\" and public key \"{}\".".format(FILE_NAME_PRIV, FILE_NAME_PUB))
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