fcry/TODO.md

# Roadmap 1.0
## Summary
Make the program real-world usable and stable.

## Knowledge and Design
* understand `encrypt_next_in_place()`'s first argument better
  * current understanding:
    * associated data is used for parts of the data that cannot be
      encrypted but should also be integrity protected by the authentication tag
    * since there are no parts that cannot be encrypted in the context of `fcry` it is correct
      to pass an empty slice to the first argument of `encrypt_next_in_place()`
* currently `fcry` uses 64 KiB blocks as single AEAD messages
  * as stated [here](https://pycryptodome.readthedocs.io/en/latest/src/cipher/chacha20_poly1305.html) (limit of 13 billion messages) would imply a maximum file-size of `64 KiB * 13e9 = 832e9 KiB = 774.86 TiB`. While a file this size could be considered a special (and unsupported) use case anyway, performance is also a consideration. Does performance improve noticably with larger message sizes?
* unit tests

## Features
* password hashing
  * configurable algorithm (sane default)
  * configurable nr of rounds (sand default)
  * a way to enter the password securely in a prompt while still being able to handle `stdin` data
* add usage examples to README.md

# Roadmap 2.0
* parallel processing: use all available (or configurable) CPU cores

# Roadmap later or never
* split into `lib` and `bin`
* other AEAD algorithms