fix: bug with counter >> 32

2020-05-08 22:34:41 +02:00 · 2020-05-08 22:34:41 +02:00 · b0fcb363e8
commit b0fcb363e8
parent 3f7f9d7905
1 changed files with 1 additions and 1 deletions
--- a/crypto_stream_chacha20.js
+++ b/crypto_stream_chacha20.js
@ -112,7 +112,7 @@ function Chacha20 (n, k, counter) {
  this.state[12] = counter & 0xffffffff

  if (n.byteLength === 8) {
-    this.state[13] = counter >> 32
+    this.state[13] = (counter && 0xffffffff00000000) >> 32
    this.state[14] = n.readUInt32LE(0)
    this.state[15] = n.readUInt32LE(4)
  } else {