83 lines
2.8 KiB
JavaScript
83 lines
2.8 KiB
JavaScript
const assert = require('nanoassert')
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const Chacha20 = require('chacha20-universal')
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exports.crypto_stream_chacha20_KEYBYTES = 32
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exports.crypto_stream_chacha20_NONCEBYTES = 8
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exports.crypto_stream_chacha20_MESSAGEBYTES_MAX = Number.MAX_SAFE_INTEGER
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exports.crypto_stream_chacha20_ietf_KEYBYTES = 32
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exports.crypto_stream_chacha20_ietf_NONCEBYTES = 12
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exports.crypto_stream_chacha20_ietf_MESSAGEBYTES_MAX = 2 ** 32
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exports.crypto_stream_chacha20 = function (c, n, k) {
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c.fill(0)
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exports.crypto_stream_chacha20_xor(c, c, n, k)
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}
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exports.crypto_stream_chacha20_xor = function (c, m, n, k) {
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assert(n.byteLength === exports.crypto_stream_chacha20_NONCEBYTES,
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'n should be crypto_stream_chacha20_NONCEBYTES')
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assert(k.byteLength === exports.crypto_stream_chacha20_KEYBYTES,
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'k should be crypto_stream_chacha20_KEYBYTES')
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const xor = new Chacha20(n, k)
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xor.update(c, m)
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xor.final()
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}
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exports.crypto_stream_chacha20_xor_ic = function (c, m, n, ic, k) {
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assert(n.byteLength === exports.crypto_stream_chacha20_NONCEBYTES,
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'n should be crypto_stream_chacha20_NONCEBYTES')
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assert(k.byteLength === exports.crypto_stream_chacha20_KEYBYTES,
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'k should be crypto_stream_chacha20_KEYBYTES')
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const xor = new Chacha20(n, k, ic)
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xor.update(c, m)
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xor.final()
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}
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exports.crypto_stream_chacha20_xor_instance = function (n, k) {
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assert(n.byteLength === exports.crypto_stream_chacha20_NONCEBYTES,
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'n should be crypto_stream_chacha20_NONCEBYTES')
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assert(k.byteLength === exports.crypto_stream_chacha20_KEYBYTES,
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'k should be crypto_stream_chacha20_KEYBYTES')
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return new Chacha20(n, k)
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}
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exports.crypto_stream_chacha20_ietf = function (c, n, k) {
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c.fill(0)
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exports.crypto_stream_chacha20_ietf_xor(c, c, n, k)
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}
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exports.crypto_stream_chacha20_ietf_xor = function (c, m, n, k) {
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assert(n.byteLength === exports.crypto_stream_chacha20_ietf_NONCEBYTES,
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'n should be crypto_stream_chacha20_ietf_NONCEBYTES')
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assert(k.byteLength === exports.crypto_stream_chacha20_ietf_KEYBYTES,
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'k should be crypto_stream_chacha20_ietf_KEYBYTES')
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const xor = new Chacha20(n, k)
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xor.update(c, m)
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xor.final()
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}
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exports.crypto_stream_chacha20_ietf_xor_ic = function (c, m, n, ic, k) {
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assert(n.byteLength === exports.crypto_stream_chacha20_ietf_NONCEBYTES,
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'n should be crypto_stream_chacha20_ietf_NONCEBYTES')
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assert(k.byteLength === exports.crypto_stream_chacha20_ietf_KEYBYTES,
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'k should be crypto_stream_chacha20_ietf_KEYBYTES')
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const xor = new Chacha20(n, k, ic)
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xor.update(c, m)
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xor.final()
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}
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exports.crypto_stream_chacha20_ietf_xor_instance = function (n, k) {
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assert(n.byteLength === exports.crypto_stream_chacha20_ietf_NONCEBYTES,
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'n should be crypto_stream_chacha20_ietf_NONCEBYTES')
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assert(k.byteLength === exports.crypto_stream_chacha20_ietf_KEYBYTES,
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'k should be crypto_stream_chacha20_ietf_KEYBYTES')
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return new Chacha20(n, k)
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}
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