dsp-blockchain/create_keys.py

import rsa
from cryptography.fernet import Fernet
# create the symmetric key only for the JSON file - we are going to only encrypt the keys 
key = Fernet.generate_key()

# write the symmetric key to a file
k = open('symmetric.key','wb')
k.write(key)
k.close()

# create the pub & private keys for the parties
(pubkey_forParty1,privkey_forParty1)=rsa.newkeys(2048)
(pubkey_forParty2,privkey_forParty2)=rsa.newkeys(2048)

# write the public key to a file
pukey = open('publickeys.key','wb')
pukey.write(pubkey_forParty1.save_pkcs1('PEM'))
pukey.write(pubkey_forParty2.save_pkcs1('PEM'))
pukey.close()

# write the private key to a file
prkey = open('privkeys.key','wb')
prkey.write(privkey_forParty1.save_pkcs1('PEM'))
prkey.write(privkey_forParty2.save_pkcs1('PEM'))
prkey.close()