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#!/usr/bin/env python
'''Re-encryption demonstration
This little program shows how to re-encrypt crypto from versions older than 2.0.
Those versions were inherently insecure, and version 2.0 solves those
insecurities. This did result in a different crypto format, so it's not backward
compatible. Use this program as a demonstration on how to re-encrypt your
files/passwords/whatevers into the new format.
'''
import sys
import rsa
from rsa import _version133 as insecure
(pub, priv) = rsa.newkeys(64)
# Construct the encrypted content. You'd typically read an encrypted file or
# stream here.
cleartext = 'Give me more cowbell'
old_crypto = insecure.encrypt(cleartext, pub)
print 'Old crypto:', old_crypto
print
# Decrypt and re-encrypt the contents to make it compatible with the new RSA
# module.
decrypted = insecure.decrypt(old_crypto, priv)
new_crypto = rsa.encrypt(decrypted, pub)
print 'New crypto:', new_crypto
print
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