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This commit is contained in:
Theron Spiegl 2020-11-23 20:42:16 -06:00
parent b6fe5fde1c
commit 41a7e1a55f
1 changed files with 18 additions and 8 deletions
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22
crypto_secretstream.js
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@ -1,8 +1,9 @@
/* 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_KEYBYTES, crypto_stream_chacha20_ietf_NONCEBYTES, } = require('./crypto_stream_chacha20')
const { crypto_stream_chacha20_ietf, crypto_stream_chacha20_ietf_xor, 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 crypto_secretstream_xchacha20poly1305_COUNTERBYTES = 4
const crypto_secretstream_xchacha20poly1305_INONCEBYTES = 8
@ -25,12 +26,13 @@ const crypto_secretstream_xchacha20poly1305_ABYTES = 1 + crypto_aead_xchacha20po
// SODIUM_MIN(SODIUM_SIZE_MAX - crypto_secretstream_xchacha20poly1305_ABYTES, \
// (64ULL * ((1ULL << 32) - 2ULL)))
const crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAX = Number.MAX_SAFE_INTEGER
const crypto_aead_chacha20poly1305_ietf_MESSAGEBYTES_MAX = Number.MAX_SAFE_INTEGER
// #define STATE_COUNTER(STATE) ((STATE)->nonce)
// #define STATE_INONCE(STATE) ((STATE)->nonce + \
// crypto_secretstream_xchacha20poly1305_COUNTERBYTES)
// const _pad0 = new Uint8Array(16).fill(0)
const _pad0 = new Uint8Array(16).fill(0)
class crypto_secretstream_xchacha20poly1305_state {
constructor (k, nonce, pad) {
@ -265,12 +267,17 @@ function crypto_secretstream_xchacha20poly1305_push (state, out, m, ad, tag) {
// assert(ad instanceof Uint8Array && ad.length === adlen, "ad is not byte array of length adlen")
const block = new Uint8Array(64)
const slen = new Uint8Array(8)
// const slen = new Uint8Array(8)
assert(crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAX
<= crypto_aead_chacha20poly1305_ietf_MESSAGEBYTES_MAX)
assert(crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAX <=
crypto_aead_chacha20poly1305_ietf_MESSAGEBYTES_MAX)
crypto_stream_chacha20_ietf(block, state.nonce, state.k)
const poly = new Poly1305(block)
block.fill(0)
poly.update(ad, 0, ad.byteLength)
poly.update(_pad0, 0, (0x10 - ad.byteLength) & 0xf)
}
// int
@ -412,8 +419,11 @@ function crypto_secretstream_xchacha20poly1305_push (state, out, m, ad, tag) {
// }
module.exports = {
crypto_aead_xchacha20poly1305_ietf_ABYTES,
crypto_secretstream_xchacha20poly1305_ABYTES,
crypto_secretstream_xchacha20poly1305_keygen,
crypto_secretstream_xchacha20poly1305_init_push,
crypto_secretstream_xchacha20poly1305_init_pull,
crypto_secretstream_xchacha20poly1305_rekey
crypto_secretstream_xchacha20poly1305_rekey,
crypto_secretstream_xchacha20poly1305_push
}