Move config import/export encryption to the UI

[mssalvatore]

Refactor

Component(s) to be refactored

• UI

Explanation

New endpoints have been added in #2000 to allow configuration to me modified. When a configuration is retrieved from the Island, encrypting it is a matter of formatting/presentation, not the responsibility of the backend. Move the encryption/decryption of configuration during import/export to the UI. Use the new endpoints added in #2000.

Tasks

• Re-implement the monkey/monkey_island/cc/server_utils/encryption/password_based_string_encryptor.py functionality on the front end (0.5d) - @VakarisZ
  • Select a javascript encryption library
  • Implement the encryption feature
  • Implement the decryption feature
• Refactor the UI to encrypt/decrypt on export/import (0d)
• Remove backend encryption/decryption infrastructure and unit tests (0d) - @shreyamalviya
  • Remove the disused python encryption classes
  • Remove disused python dependencies
• Remove the old configuration import/export endpoints (0d) @ilija-lazoroski