예제 #1
0
파일: aescipher.py 프로젝트: siq/scheme
    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
예제 #2
0
파일: aescipher.py 프로젝트: siq/scheme
 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