44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
import logging
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import base64
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from cryptography.fernet import Fernet
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import psycopg2
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from psycopg2 import sql
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logging.basicConfig(level=logging.DEBUG)
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logg = logging.getLogger(__file__)
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class ReferenceDatabase:
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def __init__(self, dbname, **kwargs):
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logg.debug(kwargs)
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self.conn = psycopg2.connect('dbname='+dbname)
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self.cur = self.conn.cursor()
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self.cryptengine = None
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if kwargs.get('symmetric_key') != None:
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be = kwargs.get('symmetric_key')
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self.cryptengine = Fernet(base64.b64encode(be))
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def get(self, address):
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s = sql.SQL('SELECT key_ciphertext FROM ethereum WHERE wallet_address_hex = %s')
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logg.debug(address)
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self.cur.execute(s, [ address ] )
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k = self.cur.fetchone()[0]
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return self.decrypt(k)
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def decrypt(self, c):
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if self.cryptengine == None:
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return c
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logg.debug('decryption')
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return self.cryptengine.decrypt(c.encode('utf-8'))
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def __exit__(self):
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self.conn
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self.cur.close()
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self.conn.close()
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