Module encryption 

Structs

EncryptionService

Manages encryption keys and provides XChaCha20-Poly1305 encryption/decryption

Enums

EncryptionError

Constants

CHUNK_SIZE

64KB plaintext chunks

ENCRYPTED_CHUNK_SIZE

Each encrypted chunk: plaintext + 16-byte auth tag

NONCE_SIZE

XChaCha20-Poly1305 nonce size (24 bytes).

TAG_SIZE

Poly1305 auth tag size (16 bytes).

Functions

encrypted_chunk_range

Calculate the encrypted byte range for a plaintext byte range.

generate_random_key

Generate a random 32-byte key.