An easy crypto library to send messages using key encapsulation. A courier for Alice, Bob and friends.
Mainly to learn crypto, and i wanted to have library that works in the browser and node with a simple api. Another requirement was that it had to be versioned and with fixed constants.
npm install faythe --saveconst faythe = require('faythe').v1
const Alice = new faythe.Identity()
const Bob = new faythe.Identity()
const packed = faythe.packMessage('Hello world', [Bob], Alice)
const unpacked = faythe.unpackMessage(packed, Bob).toString()
console.log(unpacked) // Hello worldReturns an object, with the encrypted message and the keys to decrypt for each recipient. If no senderKeys, the message is packed anonymously. Follows some Aries RFC 0019 specs, but can't be considered an implementation.
recipientPublicKeys an array of publicKeys
senderKeys an object with publicKey and privateKey
nonRepubiable false by default. Boolean to sign or not the message.
Returns the message decrypted or null if something went wrong.
Returns an object with an ed25519 publicKey and privateKey
Returns a 32 bytes Blake2b hashed buffer
data can be a buffer, uintArray or string
Uses blake2b to derive a 32 bytes key
Returns a shared secret between a public and private keys. Uses diffieHellman.
Authenticated (asymmetric) encryption between a public and private keys. The nonce is randomly generated if not present, then, concatenated to de begining of the ciphertext. Uses XChaCha20Poly1305.
Authenticated (asymmetric) decryption between a public and private keys. If nonce is not present, is extracted from the ciphertext. Uses XChaCha20Poly1305.
Anonymous (symmetric) encryption usin a common sharedSecret. AAD for addional data. Uses XChaCha20Poly1305.
Anonymous (symmetric) decryption usin a common sharedSecret. Uses XChaCha20Poly1305.
Returns the signature of data from the given keys. The salt is optional, concats with data.
Verifies the signature from the given publicKey.
Faythe export this class to easy manage identity related features. WIP
See test folder for Identity management examples
MIT
Copyright (c) 2020 Javi Santos
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