WEB TODO

This is the to-do list for the first JS prototype of Covert.
This prototype should demonstrate fast and efficient encryption of files/messages using chunked encryption (with chacha20poly1305 and ARGON2 browser SIMD) and service worker stream based file download (FetchEvent with ReadableStream based Response to download). And public key encrypt & sign with SSH, Age and Minisign keys.

- [ ] Third party modules
* [x] Sodium
* [ ] ChaCha20-Poly1305 (faster than sodium, if available)
* [x] Argon2-browser (faster than sodium)
* [ ] Bcrypt (for SSH keys, doesn't need to be fast)
* [ ] Bech32 encode/decode (Age keys; implementations exist for cryptocurrencies)
* [x] Dirty Elligator 2 (Monocypher)
* [x] zxcvbn (password hints)
* [x] MessagePack (archive)
* [ ] Signal's XEdDSA (if existing implementation can be used)
- [x] Password authentication
* [x] Unicode normalise, UTF-8
* [x] Hints (UI)
* [x] Wordlist
* [x] Passphrase Generation
* [x] Autocomplete
* [x] pwhash/authkey (Argon2)
- [x] Public key authentication
* [x] Data structure to hold a key (no Ed25519 needed because Covert now only uses Curve25519)
* [x] Auth key (based on sodium)
* [x] Ephemeral keys (needs elligator2)
* [ ] SSH keys
* [x] Age keys (provided that bech32 is fixed)
* [ ] Minisign keys
* [x] Wireguard keys
- [x] Header (authentication)
* [x] Data structure for keeping auth data
* [x] XOR
* [x] Find Block0
* [x] Advanced mode find slot
- [ ] Blockstream
* [ ] Decrypt from file stream into blocks
* [ ] Encrypt from blocks into file stream
* [x] Nonce increment
- [ ] Archive
* [ ] Index header processing
* [ ] Encode (writes blocks, message and files received from other code)
* [ ] Decode (reads blocks, message and files sent to other code)
* [x] Randomise padding
- [x] Armoring (standard base64)
* [ ] Extra handling ported from Python implementation
- [ ] Signing (needs XEdDSA)

This should be interesting.
If something is missing feel free to edit. Or if it looks messy/unorganized lol.

No files, tests, or entry points are named. Start by reviewing the unchecked prototype items and their dependencies, then define a smaller scoped task; completion is not defined for this issue as a whole beyond implementing the remaining checklist items.

Written by the indexing model from the issue text.