Python-TweetNaCl

Note: you probably don't want to use this. Use pynacl instead, which has more features and is better-maintained.

This is a python binding to the "tweetnacl" cryptography library, by djb and others. The binding was originally written by Jan Mojžíš, downloaded from http://mojzis.com/software/python-tweetnacl/index.html . It was further modified by Brian Warner.

Exposed Functions

• Public-Key Authenticated Encryption (Curve25519+XSalsa20+Poly1305)

  • pk,sk = crypto_box_keypair()
  • encryption:
  • c = crypto_box(msg, nonce, pk_B, sk_A)
  • encryption pre-computation:
  • k = crypto_box_beforenm(pk_B, sk_A)
  • c = crypto_box_afternm(msg, nonce, k)
  • decryption:
  • msg = crypto_box_open(c, nonce, pk_A, sk_B)
  • decryption pre-computation:
  • msg = crypto_box_open_afternm(c, nonce, k)

• Symmetric-Key Authenticated Encryption (XSalsa20+Poly1305)

  • c = crypto_secretbox(msg, nonce, key)
  • msg = crypto_secretbox_open(c, nonce, key)

• Public-Key Signatures (Ed25519)

  • pk,sk = crypto_sign_keypair()
  • signedmsg = crypto_sign(msg, sk)
  • msg = crypto_sign_open(signedmsg, pk)

• Hashing (SHA512)

  • h = crypto_hash(msg)

• constant-time comparison

  • crypto_verify_16(x,y)
  • crypto_verify_32(x,y)

• Scalar Multiplication (Curve25519)

  • p2 = crypto_scalarmult(n, p1)
  • p2 = crypto_scalarmult_base(n)

• Pseudo-Random Stream Generator (XSalsa20)

  • c = crypto_stream(len, nonce, key)
  • unauthenticated stream-cipher encryption:
  • c = crypto_stream_xor(msg, nonce, key)

• One-Time Authentication (Poly1305)

  • auth = crypto_onetimeauth(msg, key)
  • crypto_onetimeauth_verify(auth, msg, key)

Installation

• python setup.py build
• python setup.py test: run unit tests
• python setup.py speed: run performance benchmarks

LICENSE

This binding is released under the MIT license (see LICENSE in this distribution).