Todos
========================================

These are features either requested by users or that seem like
potentially useful things to have. Several are quite self-contained
and could make a quick project.

Request a new feature by opening a pull request to update this file.

Symmetric Algorithms, Hashes, ...
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* Bitsliced AES or Camellia
* Camellia with AES-NI
* Serpent using AVX2
* Serpent using SSSE3 pshufb for sboxes
* ChaCha20 using SSE2 or AVX2
* SHA-512 using SSE2 (to access 64-bit math on x86-32)
* scrypt
* BLAKE2b
* Skein-MAC
* ARIA (Korean block cipher, RFCs 5794 and 6209)
* Extend Cascade_Cipher to support arbitrary number of ciphers

Public Key Crypto, Math
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* EdDSA
* Ed448-Goldilocks
* FHMQV
* Support mixed hashes and non-empty param strings in OAEP
* Fast new implementations/algorithms for ECC point operations,
  Montgomery multiplication, multi-exponentiation, ...
* Some PK operations, especially RSA, have extensive computations per
  operation setup but many of the computed values depend only on the
  key and could be shared across operation objects.
* Have BigInt '%' and '/' operators compute and cache the Barrett
  reduction value on the BigInt.

TLS
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* Encrypt-then-MAC extension (RFC 7366)
* Authentication using TOFU (sqlite3 storage)
* Certificate pinning (using TACK?)
* TLS OCSP stapling (RFC 6066)
* TLS supplemental authorization data (RFC 4680, RFC 5878)
* OpenPGP authentication (RFC 5081)
* DTLS-SCTP (RFC 6083)
* Perspectives (http://perspectives-project.org/)

PKIX
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* Support multiple DNS names in certificates
* X.509 name constraints
* X.509 policy constraints
* OCSP responder logic
* X.509 attribute certificates (RFC 5755)

New Protocols
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* Off-The-Record message protocol
* Some useful subset of OpenPGP
* SSHv2 client and/or server
* Cash schemes (such as Lucre, credlib, bitcoin?)

Library Infrastructure
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* Add logging callbacks
* Add latency tracing framework
* Compute cycles/byte estimates for benchmark output

Accelerators / backends
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* Extend OpenSSL provider (cipher modes, ECDH, ECDSA, HMAC)
* /dev/crypto
* Windows CryptoAPI
* Apple CommonCrypto
* ARMv8 crypto extensions
* Intel Skylake SHA-1/SHA-2

FFI (Python, OCaml)
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* Expose TLS

Build
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* Code signing for Windows installers