1 files changed, 19 insertions, 7 deletions
diff --git a/node_modules/hash-base/index.js b/node_modules/hash-base/index.js
index 9cd6a7005..bf788daa4 100644
--- a/node_modules/hash-base/index.js
+++ b/node_modules/hash-base/index.js
@@ -1,11 +1,18 @@
 'use strict'
+var Buffer = require('safe-buffer').Buffer
 var Transform = require('stream').Transform
 var inherits = require('inherits')
 
+function throwIfNotStringOrBuffer (val, prefix) {
+  if (!Buffer.isBuffer(val) && typeof val !== 'string') {
+    throw new TypeError(prefix + ' must be a string or a buffer')
+  }
+}
+
 function HashBase (blockSize) {
   Transform.call(this)
 
-  this._block = new Buffer(blockSize)
+  this._block = Buffer.allocUnsafe(blockSize)
   this._blockSize = blockSize
   this._blockOffset = 0
   this._length = [0, 0, 0, 0]
@@ -18,8 +25,7 @@ inherits(HashBase, Transform)
 HashBase.prototype._transform = function (chunk, encoding, callback) {
   var error = null
   try {
-    if (encoding !== 'buffer') chunk = new Buffer(chunk, encoding)
-    this.update(chunk)
+    this.update(chunk, encoding)
   } catch (err) {
     error = err
   }
@@ -30,7 +36,7 @@ HashBase.prototype._transform = function (chunk, encoding, callback) {
 HashBase.prototype._flush = function (callback) {
   var error = null
   try {
-    this.push(this._digest())
+    this.push(this.digest())
   } catch (err) {
     error = err
   }
@@ -39,9 +45,9 @@ HashBase.prototype._flush = function (callback) {
 }
 
 HashBase.prototype.update = function (data, encoding) {
-  if (!Buffer.isBuffer(data) && typeof data !== 'string') throw new TypeError('Data must be a string or a buffer')
+  throwIfNotStringOrBuffer(data, 'Data')
   if (this._finalized) throw new Error('Digest already called')
-  if (!Buffer.isBuffer(data)) data = new Buffer(data, encoding || 'binary')
+  if (!Buffer.isBuffer(data)) data = Buffer.from(data, encoding)
 
   // consume data
   var block = this._block
@@ -63,7 +69,7 @@ HashBase.prototype.update = function (data, encoding) {
   return this
 }
 
-HashBase.prototype._update = function (data) {
+HashBase.prototype._update = function () {
   throw new Error('_update is not implemented')
 }
 
@@ -73,6 +79,12 @@ HashBase.prototype.digest = function (encoding) {
 
   var digest = this._digest()
   if (encoding !== undefined) digest = digest.toString(encoding)
+
+  // reset state
+  this._block.fill(0)
+  this._blockOffset = 0
+  for (var i = 0; i < 4; ++i) this._length[i] = 0
+
   return digest
 }