sodium-javascript/crypto_stream.js

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var xsalsa20 = require('xsalsa20')
exports.crypto_stream_KEYBYTES = 32
exports.crypto_stream_NONCEBYTES = 24
exports.crypto_stream_PRIMITIVE = 'xsalsa20'
exports.crypto_stream = function (out, nonce, key) {
out.fill(0)
exports.crypto_stream_xor(out, out, nonce, key)
}
exports.crypto_stream_xor = function (out, inp, nonce, key) {
var xor = xsalsa20(nonce, key)
xor.update(inp, out)
xor.final()
}
exports.crypto_stream_xor_instance = function (nonce, key) {
return new XOR(nonce, key)
}
function XOR (nonce, key) {
this._instance = xsalsa20(nonce, key)
}
XOR.prototype.update = function (out, inp) {
this._instance.update(inp, out)
}
XOR.prototype.final = function () {
this._instance.finalize()
this._instance = null
}