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This commit is contained in:
Theron Spiegl 2020-11-24 17:17:42 -06:00
parent 468a9d82a9
commit 7a8626bfe0
1 changed files with 22 additions and 13 deletions
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35
crypto_secretstream.js
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@ -1,11 +1,17 @@
/* eslint-disable camelcase */
const { assert } = require('nanoassert')
const { randombytes_buf } = require('./randombytes')
const { crypto_stream_chacha20_ietf, crypto_stream_chacha20_ietf_xor, crypto_stream_chacha20_ietf_xor_ic, crypto_stream_chacha20_ietf_KEYBYTES, crypto_stream_chacha20_ietf_NONCEBYTES } = require('./crypto_stream_chacha20')
const {
crypto_stream_chacha20_ietf,
crypto_stream_chacha20_ietf_xor,
crypto_stream_chacha20_ietf_xor_ic,
crypto_stream_chacha20_ietf_KEYBYTES,
crypto_stream_chacha20_ietf_NONCEBYTES
} = require('./crypto_stream_chacha20')
const { crypto_core_hchacha20, crypto_core_hchacha20_INPUTBYTES } = require('./crypto_core_hchacha20')
const Poly1305 = require('./internal/poly1305')
const { STORE64_LE } = require('./crypto_kdf')
const { sodium_increment } = require('./helpers')
const { sodium_increment, sodium_is_zero } = require('./helpers')
const crypto_onetimeauth_poly1305_BYTES = 16
const crypto_secretstream_xchacha20poly1305_COUNTERBYTES = 4
@ -19,6 +25,9 @@ const crypto_secretstream_xchacha20poly1305_ABYTES = 1 + crypto_aead_xchacha20po
const crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAX = Number.MAX_SAFE_INTEGER
const crypto_aead_chacha20poly1305_ietf_MESSAGEBYTES_MAX = Number.MAX_SAFE_INTEGER
const crypto_secretstream_xchacha20poly1305_TAG_MESSAGE = 0
const crypto_secretstream_xchacha20poly1305_TAG_PUSH = 1
const crypto_secretstream_xchacha20poly1305_TAG_REKEY = 2
const crypto_secretstream_xchacha20poly1305_TAG_FINAL = crypto_secretstream_xchacha20poly1305_TAG_PUSH | crypto_secretstream_xchacha20poly1305_TAG_REKEY
// #define STATE_COUNTER(STATE) ((STATE)->nonce)
// #define STATE_INONCE(STATE) ((STATE)->nonce + \
@ -147,9 +156,9 @@ function crypto_secretstream_xchacha20poly1305_push (state, out, m, ad, tag) {
mac, crypto_secretstream_xchacha20poly1305_INONCEBYTES)
sodium_increment(state.nonce)
if ((tag & crypto_secretstream_xchacha20poly1305_TAG_REKEY) != 0 ||
sodium_is_zero(STATE_COUNTER(state), crypto_secretstream_xchacha20poly1305_COUNTERBYTES)) {
crypto_secretstream_xchacha20poly1305_rekey(state)
if ((tag & crypto_secretstream_xchacha20poly1305_TAG_REKEY) !== 0 ||
sodium_is_zero(state.nonce, crypto_secretstream_xchacha20poly1305_COUNTERBYTES)) {
crypto_secretstream_xchacha20poly1305_rekey(state)
}
// if (outlen_p != NULL) {
// *outlen_p = crypto_secretstream_xchacha20poly1305_ABYTES + mlen;
@ -179,13 +188,13 @@ function crypto_secretstream_xchacha20poly1305_pull (state, m, _in, ad) {
block.fill(0) // memset(block, 0, sizeof block);
block[0] = _in[0]
crypto_stream_chacha20_ietf_xor_ic(block, block, nonce, 1, state.k)
crypto_stream_chacha20_ietf_xor_ic(block, block, state.nonce, 1, state.k)
const tag = block[0]
block[0] = _in[0]
poly.update(block, 0, block.byteLength)
c = _in.subarray(1, _in.length)
const c = _in.subarray(1, _in.length)
poly.update(c, 0, mlen)
// poly.update(_in, 1, mlen)
poly.update(_pad0, (0x10 - block.byteLength + mlen) & 0xf)
@ -209,8 +218,8 @@ function crypto_secretstream_xchacha20poly1305_pull (state, m, _in, ad) {
mac, crypto_secretstream_xchacha20poly1305_INONCEBYTES)
sodium_increment(state.nonce)
if ((tag & crypto_secretstream_xchacha20poly1305_TAG_REKEY) != 0 ||
sodium_is_zero(STATE_COUNTER(state), crypto_secretstream_xchacha20poly1305_COUNTERBYTES)) {
if ((tag & crypto_secretstream_xchacha20poly1305_TAG_REKEY) !== 0 ||
sodium_is_zero(state.nonce, crypto_secretstream_xchacha20poly1305_COUNTERBYTES)) {
crypto_secretstream_xchacha20poly1305_rekey(state)
}
return tag
@ -220,7 +229,7 @@ function crypto_secretstream_xchacha20poly1305_statebytes () {
return crypto_stream_chacha20_ietf_KEYBYTES + crypto_stream_chacha20_ietf_NONCEBYTES + 8
}
function crypto_secretstream_xchacha20poly1305_abytes() {
function crypto_secretstream_xchacha20poly1305_abytes () {
return crypto_secretstream_xchacha20poly1305_ABYTES
}
@ -253,9 +262,9 @@ function crypto_secretstream_xchacha20poly1305_tag_final () {
}
function xor_buf (out, _in, n) {
for (let i = 0; i < n; i++) {
out[i] ^= _in[i]
}
for (let i = 0; i < n; i++) {
out[i] ^= _in[i]
}
}
module.exports = {