Important notes:

Not taking into consideration the .Net Crypto service provider from .Net framework, there are still three exceptions that can be thrown from the very own Extension code:

• An invalid RSA Padding has been provided:
  • "Unknown padding"
• An invalid AES bit key size has been provided:
  • "Invalid bit length"
• In any way, the ciphered message has been tampered with, making the HMACSHA256 calculated by the AES_Encrypt being different from calculated ciphered message one on the AES_Decrypt function:
  • "Decryption Failed"