fix: when value is Number,Buffer.alloc replace Buffer.from (#719)

Author: weiyie

package.json

@@ -30,6 +30,7 @@
     "publish-to-cdn": "node publish.js",
     "snyk-protect": "snyk protect",
     "prepublish": "npm run snyk-protect",
+    "lint-staged": "lint-staged",
     "detect-secrets": "node task/detect-secrets"
   },
   "git-pre-hooks": {
@@ -38,7 +39,7 @@
       "npm run publish-to-npm",
       "npm run publish-to-cdn"
     ],
-    "pre-commit": "lint-staged"
+    "pre-commit": "npm run lint-staged"
   },
   "repository": {
     "type": "git",

shims/crypto/crypto.js

@@ -11,7 +11,7 @@ var algorithms = {
 };
 
 var blocksize = 64;
-var zeroBuffer = Buffer.from(blocksize);
+var zeroBuffer = Buffer.alloc(blocksize);
 zeroBuffer.fill(0);
 
 function hmac(fn, key, data) {
@@ -24,7 +24,7 @@ function hmac(fn, key, data) {
     key = Buffer.concat([key, zeroBuffer], blocksize)
   }
 
-  var ipad = Buffer.from(blocksize), opad = Buffer.from(blocksize);
+  var ipad = Buffer.alloc(blocksize), opad = Buffer.alloc(blocksize);
   for(var i = 0; i < blocksize; i++) {
     ipad[i] = key[i] ^ 0x36
     opad[i] = key[i] ^ 0x5C

shims/crypto/helpers.js

@@ -1,6 +1,6 @@
 var Buffer = require('buffer').Buffer;
 var intSize = 4;
-var zeroBuffer = Buffer.from(intSize); zeroBuffer.fill(0);
+var zeroBuffer = Buffer.alloc(intSize); zeroBuffer.fill(0);
 var chrsz = 8;
 
 function toArray(buf, bigEndian) {
@@ -18,7 +18,7 @@ function toArray(buf, bigEndian) {
 }
 
 function toBuffer(arr, size, bigEndian) {
-  var buf = Buffer.from(size);
+  var buf = Buffer.alloc(size);
   var fn = bigEndian ? buf.writeInt32BE : buf.writeInt32LE;
   for (var i = 0; i < arr.length; i++) {
     fn.call(buf, arr[i], i * 4, true);