sodium-javascript/crypto_kx.js

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Split library into modules (#20) * crypto_stream: signature change needed to modularise * move ed25519 arithmetic to separate module * module: poly1305 * module: crypto_scalarmult * module: crypto_hash * module: crypto_sign * module: crypto_secretbox * move verify functions to crypto_verify module * leftover crypto_stream functions * module: crypto_onetimeauth * module: crypto_box * tidy up * require ed25519.js * update: crypto_hash * add chacha20; align API with PR#21 * update sha512 to wasm module * fix bugs in crypto_sign * be standard * add: crypto_box_seed_keypair; alias crypto_kx methods to crypto_box * scalarmult: import curve methods; be standard * correction: crypto_kx is not actually an alias of crypto_box * export _9 constant field element * add: crypto_box_seed_keypair * removed duplicate module.exports declaraion * declare constants about exports * rename memzero -> sodium-memzero * update sodium_memzero function to arr.fill(0) * tidy: remove legacy functions * added: crypto_aead_chacha20poly1305_ietf methods * listen to linter * add assertions * chacha: readUint32Le generalised for uint8array; aead: standard fix * add null check on ad param * added: sodium_memcmp * export sodium_memcmp * export crypto_verify module * sodium_memcmp returns boolean * added: sodium_is_zero * catch syntax error * throw if crypto_aead cannot validate, fix typo in crypto_verify * move chacha20 alg to external module * use Uint8Arrays instead of buffers * change checks to assertions * bump to chacha 1.0.3 - remove Buffer dependency * reduce code branching, align return values with sodium-native * add sha-wasm deps to package.json * standard fixes * bump chacha20 to 1.0.4: remove Buffer dep * move crypto_hash_sha256 to module to uncouple wasm dependencies * add endian check: all other modules require members of this set * correct filename: crypto_hash_sha256 * export constant: crypto_hash_sha512_BYTES
2020-06-18 15:09:03 +00:00
const { crypto_scalarmult_base } = require('./crypto_scalarmult')
const { crypto_generichash } = require('./crypto_generichash')
const { randombytes_buf } = require('./randombytes')
const assert = require('nanoassert')
var crypto_kx_SEEDBYTES = 32
var crypto_kx_PUBLICKEYBYTES = 32
var crypto_kx_SECRETKEYBYTES = 32
function crypto_kx_keypair (pk, sk) {
assert(pk.byteLength === crypto_kx_PUBLICKEYBYTES, "pk must be 'crypto_kx_PUBLICKEYBYTES' bytes")
assert(sk.byteLength === crypto_kx_SECRETKEYBYTES, "sk must be 'crypto_kx_SECRETKEYBYTES' bytes")
randombytes_buf(sk, crypto_kx_SECRETKEYBYTES)
return crypto_scalarmult_base(pk, sk)
}
function crypto_kx_seed_keypair (pk, sk, seed) {
assert(pk.byteLength === crypto_kx_PUBLICKEYBYTES, "pk must be 'crypto_kx_PUBLICKEYBYTES' bytes")
assert(sk.byteLength === crypto_kx_SECRETKEYBYTES, "sk must be 'crypto_kx_SECRETKEYBYTES' bytes")
assert(seed.byteLength === crypto_kx_SEEDBYTES, "seed must be 'crypto_kx_SEEDBYTES' bytes")
crypto_generichash(sk, seed)
return crypto_scalarmult_base(pk, sk)
}
module.exports = {
crypto_kx_keypair,
crypto_kx_seed_keypair,
crypto_kx_SEEDBYTES,
crypto_kx_SECRETKEYBYTES,
crypto_kx_PUBLICKEYBYTES
}