def encrypt(self, plaintext, stable=False):
result = plaintext
log('info', 'Going to encrypt text')
if plaintext:
if isinstance(plaintext, unicode):
# swig wrapper for _xssl.so won't currently marshal unicode strings
plaintext = plaintext.encode('utf-8')
try:
version, key, iv = self.getKey()
if not key or not iv:
# the key must have been tempered with
self.generateNewKey()
version, key, iv = self._getKey()
if key and iv:
pyssl = pySSL.getInstance()
# encrypt using default cipher, passcode (key+iv), with salt, base64-encoded results
# (note the passcode is generated from key+iv for backward compatibility)
passcode = key+iv
if stable:
encryptedText = pyssl.encrypt_passcode(plaintext, passcode, True, use_salt=False)
else:
encryptedText = pyssl.encrypt_passcode(plaintext, passcode, True)
# format: VVV(key version) + encryptedText
result = self._toHex(version>>8)[1] + self._toHex(version & 0xff) + encryptedText
else:
log('error', 'Failed to encrypt data! Plain-text is returned!')
except:
log('error', 'Exception, failed to encrypt data! Plain-text is returned!')
raise OperationError('Exception, Failed to encrypt data! Plain-text is returned!')
return result
def _decrypt(self, encryptedText):
version = int(encryptedText[0:3])
plaintext = encryptedText
version, key, iv = self.getKey(version)
if key and iv:
pyssl = pySSL.getInstance()
# decrypt using default cipher, passcode (key+iv), base64-encoded input
# (note the passcode is generated from key+iv for backward compatibility)
passcode = key+iv
plaintext = pyssl.decrypt_passcode(encryptedText[3:], passcode, True)
else:
log('error', 'Failed to decrypt data! Encrypted text is returned!')
return plaintext
