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Use SQLAlchemy

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This commit is contained in:
nolash
2020-10-20 08:37:20 +02:00
parent 4eb2617198
commit f507765331
5 changed files with 66 additions and 32 deletions
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50
crypto_dev_signer/keystore/postgres.py
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@@ -4,9 +4,11 @@ import base64
# third-party imports
from cryptography.fernet import Fernet
import psycopg2
from psycopg2 import sql
from psycopg2.extensions import make_dsn
#import psycopg2
#from psycopg2 import sql
#from psycopg2.extensions import make_dsn
from sqlalchemy import create_engine, text
from sqlalchemy.orm import sessionmaker
import sha3
# local imports
@@ -36,18 +38,28 @@ class ReferenceKeystore(Keystore):
]
def __init__(self, dsn, **kwargs):
logg.debug('dsn {}'.format(dsn))
self.conn = psycopg2.connect(make_dsn(dsn))
self.cur = self.conn.cursor()
self.cur.execute(self.schema[0])
logg.debug('starting db session with dsn {}'.format(dsn))
self.db_engine = create_engine(dsn)
self.db_session = sessionmaker(bind=self.db_engine)()
for s in self.schema:
self.db_session.execute(s)
self.db_session.commit()
self.symmetric_key = kwargs.get('symmetric_key')
def __del__(self):
logg.debug('closing db session')
self.db_session.close()
def get(self, address, password=None):
safe_address = strip_hex_prefix(address)
s = sql.SQL('SELECT key_ciphertext FROM ethereum WHERE wallet_address_hex = %s')
self.cur.execute(s, [ safe_address ] )
k = self.cur.fetchone()[0]
s = text('SELECT key_ciphertext FROM ethereum WHERE wallet_address_hex = :a')
r = self.db_session.execute(s, {
'a': safe_address,
},
)
k = r.first()[0]
return self._decrypt(k, password)
@@ -55,11 +67,14 @@ class ReferenceKeystore(Keystore):
pubk = keyapi.private_key_to_public_key(pk)
address_hex = pubk.to_checksum_address()
address_hex_clean = strip_hex_prefix(address_hex)
logg.debug('importing address {}'.format(address_hex_clean))
c = self._encrypt(pk.to_bytes(), password)
s = sql.SQL('INSERT INTO ethereum (wallet_address_hex, key_ciphertext) VALUES (%s, %s)')
self.cur.execute(s, [ address_hex_clean, c.decode('utf-8') ])
self.conn.commit()
s = text('INSERT INTO ethereum (wallet_address_hex, key_ciphertext) VALUES (:a, :c)') #%s, %s)')
self.db_session.execute(s, {
'a': address_hex_clean,
'c': c.decode('utf-8'),
},
)
self.db_session.commit()
return address_hex
@@ -81,10 +96,3 @@ class ReferenceKeystore(Keystore):
def _decrypt(self, c, password):
f = self._generate_encryption_engine(password)
return f.decrypt(c.encode('utf-8'))
def __del__(self):
logg.debug('closing database')
self.conn.commit()
self.cur.close()
self.conn.close()