看看这个文章
https://mp.weixin.qq.com/s/dpGqieL4WCmGdQh1AEG4Gw

里边一段 python3 代码实现生成秘钥并加解密的功能：
```
import binascii
from Cryptodome.PublicKey import RSA
from Cryptodome.Cipher import PKCS1_v1_5


class RsaCrypto():
'''RSA 加解密'''

def create_rsa_key(self):
'''生成 RSA 秘钥对'''
try:
key = RSA.generate(2048)
encrypted_key = key.exportKey(pkcs=8)

public_key = key.publickey().exportKey().decode('utf-8')
private_key = encrypted_key.decode('utf-8')

return {'state': 1, 'message': {'public_key': public_key, 'private_key': private_key}}
except Exception as err:
return {'state': 0, 'message': str(err)}

def encrypt(self, public_key, plaintext):
'''加密方法'''
try:
recipient_key = RSA.import_key(public_key)
cipher_rsa = PKCS1_v1_5.new(recipient_key)

en_data = cipher_rsa.encrypt(plaintext.encode('utf-8'))
hex_data = binascii.hexlify(en_data).decode('utf-8')

return {'state': 1, 'message': hex_data}
except Exception as err:
return {'state': 0, 'message': str(err)}

def decrypt(self, private_key, hex_data):
'''解密方法'''
try:
private_key = RSA.import_key(private_key)
cipher_rsa = PKCS1_v1_5.new(private_key)

en_data = binascii.unhexlify(hex_data.encode('utf-8'))
data = cipher_rsa.decrypt(en_data, None).decode('utf-8')

return {'state': 1, 'message': data}
except Exception as err:
return {'state': 0, 'message': str(err)}


if __name__ == '__main__':
print(RsaCrypto().create_rsa_key())
```