SOLIDPOD: Encryption is unauthenticated (AES-CTR with no MAC)

[anushkavidanage]

In the current solidpod implementation, data is encrypted using AESMode.sic is CTR mode. CTR is malleable: flipping a bit in ciphertext flips the same bit in the decrypted plaintext, and decryption succeeds silently. Furthermore, there is no MAC, no GCM tag, no AEAD anywhere in solidpod.