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POHow to store RSA encrypted data to postgresql by using pycrypto?
 

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  1. POHow to store RSA encrypted data to postgresql by using pycrypto?
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    <p>I want to use Public/Private key to secure my UserInfo data. I'm new with PyCrypto and PostgreSQL.</p> <p>I have some items to clarify:</p> <ol> <li>Are Public Key and Private Key constant values?</li> <li>If it is constant, how can I store it properly?</li> <li>Lastly but the most important, how can I store my encrypted data to PostgreSQL? and retrieve it for verification?</li> </ol> <p>Would you guide me on how to dealt with Crypto.PublicKey.RSA as method to secure my data.</p> <p>Environment: Python 2.5, PyCrypto 2.3, PostgreSQL 8.3 UTF-8 encoding</p> <p>UserInfo model:</p> <pre><code>class UserInfo(models.Model): userid = models.TextField(primary_key = True) password = models.TextField(null = True) keyword = models.TextField(null = True) key = models.TextField(null = True, blank = True) date = models.DateTimeField(null = True, blank = True) </code></pre> <p><strong>UPDATES1</strong> tests.py:</p> <pre><code># -*- encoding:utf-8 -*- import os from os.path import abspath, dirname import sys from py23.service.models import UserInfo from Crypto import Random # Set up django project_dir = abspath(dirname(dirname(__file__))) sys.path.insert(0, project_dir) os.environ['DJANGO_SETTINGS_MODULE'] = 'py23.settings' from django.test.testcases import TestCase class AuthenticationTestCase(TestCase): def test_001_registerUserInfo(self): import Crypto.PublicKey.RSA import Crypto.Util.randpool #pool = Crypto.Util.randpool.RandomPool() rng = Random.new().read # craete RSA object by random key # 1024bit #rsa = Crypto.PublicKey.RSA.generate(1024, pool.get_bytes) rsa = Crypto.PublicKey.RSA.generate(1024, rng) # retrieve public key pub_rsa = rsa.publickey() # create RSA object by tuple # rsa.n is public key?, rsa.d is private key? priv_rsa = Crypto.PublicKey.RSA.construct((rsa.n, rsa.e, rsa.d)) # encryption enc = pub_rsa.encrypt("hello", "") # decryption dec = priv_rsa.decrypt(enc) print "private: n=%d, e=%d, d=%d, p=%d, q=%d, u=%d" % (rsa.n, rsa.e, rsa.d, rsa.p, rsa.q, rsa.u) print "public: n=%d, e=%d" % (pub_rsa.n, pub_rsa.e) print "encrypt:", enc print "decrypt:", dec # text to be signed text = "hello" signature = priv_rsa.sign(text, "") # check if the text has not changed print pub_rsa.verify(text, signature) print pub_rsa.verify(text+"a", signature) # userid = models.TextField(primary_key = True) # password = models.TextField(null = True) # keyword = models.TextField(null = True) # key = models.TextField(null = True, blank = True) is it correct to store the public key here? # date = models.DateTimeField(null = True, blank = True) userInfo = UserInfo(userid='test1', password=enc[0], key=pub_rsa.n) userInfo.save() print "ok" </code></pre> <p>result here (failed):</p> <pre><code>====================================================================== ERROR: test_001_registerUserInfo (py23.service.auth.tests.AuthenticationTestCase) ---------------------------------------------------------------------- Traceback (most recent call last): File "C:\PIDevelopment\workspace37_pydev\pyh23\py23\service\auth\tests.py", line 64, in test_001_registerUserInfo userInfo.save() File "C:\Python25\lib\site-packages\django\db\models\base.py", line 458, in save self.save_base(using=using, force_insert=force_insert, force_update=force_update) File "C:\Python25\lib\site-packages\django\db\models\base.py", line 551, in save_base result = manager._insert(values, return_id=update_pk, using=using) File "C:\Python25\Lib\site-packages\django\db\models\manager.py", line 195, in _insert return insert_query(self.model, values, **kwargs) File "C:\Python25\lib\site-packages\django\db\models\query.py", line 1524, in insert_query return query.get_compiler(using=using).execute_sql(return_id) File "C:\Python25\lib\site-packages\django\db\models\sql\compiler.py", line 788, in execute_sql cursor = super(SQLInsertCompiler, self).execute_sql(None) File "C:\Python25\lib\site-packages\django\db\models\sql\compiler.py", line 732, in execute_sql cursor.execute(sql, params) File "C:\Python25\lib\site-packages\django\db\backends\util.py", line 15, in execute return self.cursor.execute(sql, params) File "C:\Python25\lib\site-packages\django\db\backends\postgresql_psycopg2\base.py", line 44, in execute return self.cursor.execute(query, args) DatabaseError: invalid byte sequence for encoding "UTF8": 0x97 HINT: This error can also happen if the byte sequence does not match the encoding expected by the server, which is controlled by "client_encoding". ---------------------------------------------------------------------- Ran 1 test in 90.047s FAILED (errors=1) </code></pre>
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