chacha20-universal - npm Package Compare versions

Comparing version 1.0.2 to 1.0.3

index.js

@@ -7,6 +7,9 @@ const assert = require('nanoassert')
 
-function Chacha20 (n, k, counter) {
-  assert(k.byteLength === 32)
-  assert(n.byteLength === 8 || n.byteLength === 12)
+function Chacha20 (nonce, key, counter) {
+  assert(key.byteLength === 32)
+  assert(nonce.byteLength === 8 || nonce.byteLength === 12)
 
+  const n = new Uint32Array(nonce.buffer, nonce.byteOffset, nonce.byteLength / 4)
+  const k = new Uint32Array(key.buffer, key.byteOffset, key.byteLength / 4)
+
   if (!counter) counter = 0
@@ -20,3 +23,3 @@ assert(counter < Number.MAX_SAFE_INTEGER)
   for (let i = 0; i < 4; i++) this.state[i] = constant[i]
-  for (let i = 0; i < 8; i++) this.state[4 + i] = readUInt32LE(k, 4 * i)
+  for (let i = 0; i < 8; i++) this.state[4 + i] = k[i]
 
@@ -27,8 +30,8 @@ this.state[12] = counter & 0xffffffff
     this.state[13] = (counter && 0xffffffff00000000) >> 32
-    this.state[14] = readUInt32LE(n, 0)
-    this.state[15] = readUInt32LE(n, 4)
+    this.state[14] = n[0]
+    this.state[15] = n[1]
   } else {
-    this.state[13] = readUInt32LE(n, 0)
-    this.state[14] = readUInt32LE(n, 4)
-    this.state[15] = readUInt32LE(n, 8)
+    this.state[13] = n[0]
+    this.state[14] = n[1]
+    this.state[15] = n[2]
   }
@@ -136,11 +139,1 @@
 }
-
-function readUInt32LE (buf, offset) {
-  if (Buffer.isBuffer(buf)) return buf.readUInt32LE(offset)
-  else if (buf instanceof Uint8Array) {
-    var ret = 0
-    for (let i = 0; i < 4; i++) ret |= buf[offset + i] << (8 * i)
-    return ret
-  }
-  assert(false, 'buf should be a Buffer or a Uint8Array')
-}

package.json

 {
   "name": "chacha20-universal",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "description": "chacha20 in pure javascript",
@@ -5,0 +5,0 @@ "main": "index.js",

README.md

@@ -35,3 +35,3 @@ # chacha20-universal
 
-`n` should be a 12 byte nonce passed as a buffer/uint8array and `k` should be a 32 byte key. An optional `counter` may be passed as a number.
+`nonce` should be a 12 byte buffer/uint8array and `key` should be 32 byte. An optional `counter` may be passed as a number.
 
@@ -38,0 +38,0 @@ #### `xor.update(output, input)`

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Total package byte prevSize

27946

decreased by-0.82%

Lines of code

494

decreased by-1.4%

No dependency changes