Added

- support for web worker.
- typescript types. #10

Changed
- prevent webpack to require dependencies.

.npmignore

@@ -0,0 +1,7 @@
+/node_modules/
+/covreporter/
+/tests/
+.covignore
+.travis.yml
+.npmignore
+bower.json

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Change Log
 
+## v0.8.0 / 2017-11-19
+### Added
+- support for web worker.
+- typescript types. #10
+
+### Changed
+- prevent webpack to require dependencies.
+
 ## v0.7.1 / 2017-10-31
 ### Improved
 - performance of hBytes increment.

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "js-sha256",
-  "version": "0.7.1",
+  "version": "0.8.0",
   "main": ["src/sha256.js"],
   "ignore": [
     "samples",

index.d.ts

@@ -0,0 +1,59 @@
+type Message = string | number[] | ArrayBuffer | Uint8Array;
+
+interface Hasher {
+  /**
+   * Update hash
+   *
+   * @param message The message you want to hash.
+   */
+  update(message: Message): Hasher;
+
+  /**
+   * Return hash in hex string.
+   */
+  hex(): string;
+
+  /**
+   * Return hash in hex string.
+   */
+  toString(): string;
+
+  /**
+   * Return hash in ArrayBuffer.
+   */
+  arrayBuffer(): ArrayBuffer;
+
+  /**
+   * Return hash in integer array.
+   */
+  digest(): number[];
+
+  /**
+   * Return hash in integer array.
+   */
+  array(): number[];
+}
+
+interface Hash {
+  /**
+   * Hash and return hex string.
+   *
+   * @param message The message you want to hash.
+   */
+  (message: Message): string;
+
+  /**
+   * Create a hash object.
+   */
+  create(): Hasher;
+
+  /**
+   * Create a hash object and hash message.
+   *
+   * @param message The message you want to hash.
+   */
+  update(message: Message): Hasher;
+}
+
+export var sha256: Hash;
+export var sha224: Hash;

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "js-sha256",
-  "version": "0.7.0",
+  "version": "0.8.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -16,6 +16,12 @@
       "integrity": "sha1-trvgsGdLnXGXCMo43owjfLUmw9E=",
       "dev": true
     },
+    "bindings": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.3.0.tgz",
+      "integrity": "sha512-DpLh5EzMR2kzvX1KIlVC0VkC3iZtHKTgdtZ0a3pglBZdaQFjt5S9g9xd1lE+YvXyfd6mtCeRnrUfOLYiTMlNSw==",
+      "dev": true
+    },
     "coffee-script": {
       "version": "1.12.7",
       "resolved": "https://registry.npmjs.org/coffee-script/-/coffee-script-1.12.7.tgz",
@@ -199,6 +205,12 @@
       "integrity": "sha1-2JwhJMb9wTU9Zai3e/GqxLGTcIw=",
       "dev": true
     },
+    "nan": {
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/nan/-/nan-2.8.0.tgz",
+      "integrity": "sha1-7XFfP+neArV6XmJS2QqWZ14fCFo=",
+      "dev": true
+    },
     "optimist": {
       "version": "0.3.1",
       "resolved": "https://registry.npmjs.org/optimist/-/optimist-0.3.1.tgz",
@@ -264,6 +276,16 @@
       "integrity": "sha1-NEDWTgRXWViVJEGOtkHGi7kNET4=",
       "dev": true
     },
+    "webworker-threads": {
+      "version": "0.7.13",
+      "resolved": "https://registry.npmjs.org/webworker-threads/-/webworker-threads-0.7.13.tgz",
+      "integrity": "sha1-yEsYtrokElu503NC5E3rgVFi+4M=",
+      "dev": true,
+      "requires": {
+        "bindings": "1.3.0",
+        "nan": "2.8.0"
+      }
+    },
     "wordwrap": {
       "version": "0.0.3",
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",

package.json

@@ -1,13 +1,14 @@
 {
   "name": "js-sha256",
-  "version": "0.7.1",
+  "version": "0.8.0",
   "description": "A simple SHA-256 / SHA-224 hash function for JavaScript supports UTF-8 encoding.",
   "main": "src/sha256.js",
   "devDependencies": {
     "expect.js": "~0.3.1",
     "jscoverage": "~0.5.9",
     "mocha": "~2.3.4",
-    "uglifyjs": "~2.4.10"
+    "uglifyjs": "~2.4.10",
+    "webworker-threads": "^0.7.13"
   },
   "scripts": {
     "test": "mocha tests/node-test.js -r jscoverage",

src/sha256.js

@@ -1,7 +1,7 @@
 /**
  * [js-sha256]{@link https://github.com/emn178/js-sha256}
  *
- * @version 0.7.1
+ * @version 0.8.0
  * @author Chen, Yi-Cyuan [emn178@gmail.com]
  * @copyright Chen, Yi-Cyuan 2014-2017
  * @license MIT
@@ -11,14 +11,21 @@
   'use strict';
 
   var ERROR = 'input is invalid type';
-  var root = typeof window === 'object' ? window : {};
+  var WINDOW = typeof window === 'object';
+  var root = WINDOW ? window : {};
+  if (root.JS_SHA256_NO_WINDOW) {
+    WINDOW = false;
+  }
+  var WEB_WORKER = !WINDOW && typeof self === 'object';
   var NODE_JS = !root.JS_SHA256_NO_NODE_JS && typeof process === 'object' && process.versions && process.versions.node;
   if (NODE_JS) {
     root = global;
+  } else if (WEB_WORKER) {
+    root = self;
   }
   var COMMON_JS = !root.JS_SHA256_NO_COMMON_JS && typeof module === 'object' && module.exports;
   var AMD = typeof define === 'function' && define.amd;
-  var ARRAY_BUFFER = typeof ArrayBuffer !== 'undefined';
+  var ARRAY_BUFFER = !root.JS_SHA256_NO_ARRAY_BUFFER && typeof ArrayBuffer !== 'undefined';
   var HEX_CHARS = '0123456789abcdef'.split('');
   var EXTRA = [-2147483648, 8388608, 32768, 128];
   var SHIFT = [24, 16, 8, 0];
@@ -42,6 +49,12 @@
     };
   }
 
+  if (ARRAY_BUFFER && (root.JS_SHA256_NO_ARRAY_BUFFER_IS_VIEW || !ArrayBuffer.isView)) {
+    ArrayBuffer.isView = function (obj) {
+      return typeof obj === 'object' && obj.buffer && obj.buffer.constructor === ArrayBuffer;
+    };
+  }
+
   var createOutputMethod = function (outputType, is224) {
     return function (message) {
       return new Sha256(is224, true).update(message)[outputType]();
@@ -67,8 +80,8 @@
   };
 
   var nodeWrap = function (method, is224) {
-    var crypto = require('crypto');
-    var Buffer = require('buffer').Buffer;
+    var crypto = eval("require('crypto')");
+    var Buffer = eval("require('buffer').Buffer");
     var algorithm = is224 ? 'sha224' : 'sha256';
     var nodeMethod = function (message) {
       if (typeof message === 'string') {
@@ -152,23 +165,24 @@
     if (this.finalized) {
       return;
     }
-    var notString = typeof message !== 'string';
-    if (notString) {
-      if (message === null || message === undefined) {
+    var notString, type = typeof message;
+    if (type !== 'string') {
+      if (type === 'object') {
+        if (message === null) {
           throw ERROR;
-      } else if (message.constructor === root.ArrayBuffer) {
+        } else if (ARRAY_BUFFER && message.constructor === ArrayBuffer) {
           message = new Uint8Array(message);
+        } else if (!Array.isArray(message)) {
+          if (!ARRAY_BUFFER || !ArrayBuffer.isView(message)) {
+            throw ERROR;
           }
         }
-    var length = message.length;
-    if (notString) {
-      if (typeof length !== 'number' ||
-        !Array.isArray(message) && 
-        !(ARRAY_BUFFER && ArrayBuffer.isView(message))) {
+      } else {
         throw ERROR;
       }
+      notString = true;
     }
-    var code, index = 0, i, blocks = this.blocks;
+    var code, index = 0, i, length = message.length, blocks = this.blocks;
 
     while (index < length) {
       if (this.hashed) {
@@ -413,24 +427,10 @@
   };
 
   function HmacSha256(key, is224, sharedMemory) {
-    var notString = typeof key !== 'string';
-    if (notString) {
-      if (key === null || key === undefined) {
-        throw ERROR;
-      } else if (key.constructor === root.ArrayBuffer) {
-        key = new Uint8Array(key);
-      }
-    }
-    var length = key.length;
-    if (notString) {
-      if (typeof length !== 'number' ||
-        !Array.isArray(key) && 
-        !(ARRAY_BUFFER && ArrayBuffer.isView(key))) {
-        throw ERROR;
-      }
-    } else {
+    var i, type = typeof key;
+    if (type === 'string') {
       var bytes = [], length = key.length, index = 0, code;
-      for (var i = 0; i < length; ++i) {
+      for (i = 0; i < length; ++i) {
         code = key.charCodeAt(i);
         if (code < 0x80) {
           bytes[index++] = code;
@@ -450,6 +450,20 @@
         }
       }
       key = bytes;
+    } else {
+      if (type === 'object') {
+        if (key === null) {
+          throw ERROR;
+        } else if (ARRAY_BUFFER && key.constructor === ArrayBuffer) {
+          key = new Uint8Array(key);
+        } else if (!Array.isArray(key)) {
+          if (!ARRAY_BUFFER || !ArrayBuffer.isView(key)) {
+            throw ERROR;
+          }
+        }
+      } else {
+        throw ERROR;
+      }
     }
 
     if (key.length > 64) {
@@ -457,7 +471,7 @@
     }
 
     var oKeyPad = [], iKeyPad = [];
-    for (var i = 0; i < 64; ++i) {
+    for (i = 0; i < 64; ++i) {
       var b = key[i] || 0;
       oKeyPad[i] = 0x5c ^ b;
       iKeyPad[i] = 0x36 ^ b;

tests/hmac-test.js

@@ -41,12 +41,6 @@
         '865cc329d317f6d9fdbd183a3c5cc5fd4c370d11f98abbbb404bceb1e6392c7e': ['中文', '中文'],
         'efeef87be5731506b69bb64a9898a456dd12c94834c36a4d8ba99e3db79ad7ed': ['aécio', 'aécio'],
         '8a6e527049b9cfc7e1c84bcf356a1289c95da68a586c03de3327f3de0d3737fe': ['𠜎', '𠜎']
-      },
-      'ArrayBuffer': {
-        'e48411262715c8370cd5e7bf8e82bef53bd53712d007f3429351843b77c7bb9b': [
-          new ArrayBuffer(0),
-          'Hi There'
-        ]
       }
     },
     sha224_hmac: {
@@ -80,15 +74,24 @@
         'e2280928fe813aeb7fa59aa14dd5e589041bfdf91945d19d25b9f3db': ['中文', '中文'],
         '86c53dc054b16f6e006a254891bc9ff0da5df8e1a6faee3b0aaa732d': ['aécio', 'aécio'],
         'e9e5991bfb84506b105f800afac1599ff807bb8e20db8ffda48997b9': ['𠜎', '𠜎']
-      },
-      'ArrayBuffer': {
+      }
+    }
+  };
+
+  if (!(typeof JS_SHA256_NO_ARRAY_BUFFER === 'boolean' && JS_SHA256_NO_ARRAY_BUFFER)) {
+    testCases.sha256_hmac.ArrayBuffer = {
+      'e48411262715c8370cd5e7bf8e82bef53bd53712d007f3429351843b77c7bb9b': [
+        new ArrayBuffer(0),
+        'Hi There'
+      ]
+    };
+    testCases.sha224_hmac.ArrayBuffer = {
       'da8f94de91d62154b55ea4e8d6eb133f6d553bcd1f1ba205b9488945': [
         new ArrayBuffer(0),
         'Hi There'
       ]
-      }
-    }
     };
+  }
 
   var errorTestCases = [null, undefined, { length: 0 }, 0, 1, false, true, NaN, Infinity, function () {}];
 

tests/node-test.js

@@ -1,47 +1,71 @@
-// Node.js env
 expect = require('expect.js');
-sha256 = require('../src/sha256.js').sha256;
-sha224 = require('../src/sha256.js').sha224;
-require('./test.js');
-require('./hmac-test.js');
+Worker = require('webworker-threads').Worker;
 
-delete require.cache[require.resolve('../src/sha256.js')]
-delete require.cache[require.resolve('./test.js')]
-delete require.cache[require.resolve('./hmac-test.js')]
+function unset() {
+  delete require.cache[require.resolve('../src/sha256.js')];
+  delete require.cache[require.resolve('./test.js')];
+  delete require.cache[require.resolve('./hmac-test.js')];
   sha256 = null;
   sha224 = null;
+  BUFFER = undefined;
+  JS_SHA256_NO_WINDOW = undefined;
+  JS_SHA256_NO_NODE_JS = undefined;
+  JS_SHA256_NO_COMMON_JS = undefined;
+  JS_SHA256_NO_ARRAY_BUFFER = undefined;
+  JS_SHA256_NO_ARRAY_BUFFER_IS_VIEW = undefined;
+  window = undefined;
+}
 
-// Webpack browser env
-JS_SHA256_NO_NODE_JS = true;
-window = global;
+function requireToGlobal() {
   sha256 = require('../src/sha256.js').sha256;
   sha224 = require('../src/sha256.js').sha224;
+}
+
+function runCommonJsTest() {
+  requireToGlobal();
   require('./test.js');
   require('./hmac-test.js');
+  unset();
+}
 
-delete require.cache[require.resolve('../src/sha256.js')]
-delete require.cache[require.resolve('./test.js')]
-delete require.cache[require.resolve('./hmac-test.js')]
-sha256 = null;
-sha224 = null;
-
-// browser env
-JS_SHA256_NO_NODE_JS = true;
-JS_SHA256_NO_COMMON_JS = true;
+function runWindowTest() {
   window = global;
   require('../src/sha256.js');
   require('./test.js');
   require('./hmac-test.js');
+  unset();
+}
 
-delete require.cache[require.resolve('../src/sha256.js')]
-delete require.cache[require.resolve('./test.js')]
-delete require.cache[require.resolve('./hmac-test.js')]
-sha256 = null;
-sha224 = null;
+// Node.js env
+BUFFER = true;
+runCommonJsTest();
+
+// Webpack browser env
+JS_SHA256_NO_NODE_JS = true;
+window = global;
+runCommonJsTest();
+
+// browser env
+JS_SHA256_NO_NODE_JS = true;
+JS_SHA256_NO_COMMON_JS = true;
+runWindowTest();
+
+// browser env and no array buffer
+JS_SHA256_NO_NODE_JS = true;
+JS_SHA256_NO_COMMON_JS = true;
+JS_SHA256_NO_ARRAY_BUFFER = true;
+runWindowTest();
+
+// browser env and no isView
+JS_SHA256_NO_NODE_JS = true;
+JS_SHA256_NO_COMMON_JS = true;
+JS_SHA256_NO_ARRAY_BUFFER_IS_VIEW = true;
+runWindowTest();
 
 // browser AMD
 JS_SHA256_NO_NODE_JS = true;
 JS_SHA256_NO_COMMON_JS = true;
+JS_SHA256_NO_ARRAY_BUFFER_IS_VIEW = false;
 window = global;
 define = function (func) {
   sha256 = func();
@@ -52,3 +76,38 @@ define = function (func) {
 define.amd = true;
 
 require('../src/sha256.js');
+unset();
+
+// webworker
+WORKER = 'tests/worker.js';
+SOURCE = 'src/sha256.js';
+
+require('./worker-test.js');
+
+delete require.cache[require.resolve('./worker-test.js')];
+
+// cover webworker
+JS_SHA256_NO_WINDOW = true;
+JS_SHA256_NO_NODE_JS = true;
+WORKER = './worker.js';
+SOURCE = '../src/sha256.js';
+window = global;
+self = global;
+
+Worker = function (file) {
+  require(file);
+  currentWorker = this;
+
+  this.postMessage = function (data) {
+    onmessage({data: data});
+  };
+}
+
+postMessage = function (data) {
+  currentWorker.onmessage({data: data});
+}
+
+importScripts = function () {};
+
+requireToGlobal();
+require('./worker-test.js');

tests/test.js

@@ -40,18 +40,6 @@
         '182889f925ae4e5cc37118ded6ed87f7bdc7cab5ec5e78faef2e50048999473f': [211, 212],
         'd7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592': [84, 104, 101, 32, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 32, 106, 117, 109, 112, 115, 32, 111, 118, 101, 114, 32, 116, 104, 101, 32, 108, 97, 122, 121, 32, 100, 111, 103],
         '74b51c6911f9a8b5e7c499effe7604e43b672166818873c27752c248de434841': [48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55]
-      },
-
-      'Uint8Array': {
-        '182889f925ae4e5cc37118ded6ed87f7bdc7cab5ec5e78faef2e50048999473f': new Uint8Array([211, 212]),
-        'd7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592': new Uint8Array([84, 104, 101, 32, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 32, 106, 117, 109, 112, 115, 32, 111, 118, 101, 114, 32, 116, 104, 101, 32, 108, 97, 122, 121, 32, 100, 111, 103])
-      },
-      'Int8Array': {
-        'd7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592': new Int8Array([84, 104, 101, 32, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 32, 106, 117, 109, 112, 115, 32, 111, 118, 101, 114, 32, 116, 104, 101, 32, 108, 97, 122, 121, 32, 100, 111, 103])
-      },
-      'ArrayBuffer': {
-        'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855': new ArrayBuffer(0),
-        '6e340b9cffb37a989ca544e6bb780a2c78901d3fb33738768511a30617afa01d': new ArrayBuffer(1),
       }
     },
     sha224: {
@@ -83,34 +71,48 @@
         'd14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f': [],
         '730e109bd7a8a32b1cb9d9a09aa2325d2430587ddbc0c38bad911525': [84, 104, 101, 32, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 32, 106, 117, 109, 112, 115, 32, 111, 118, 101, 114, 32, 116, 104, 101, 32, 108, 97, 122, 121, 32, 100, 111, 103],
         '16ee1b101fe0e0d8dd156d598931ec19d75b0f8dc0a0455733c168c8': [48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55, 56, 48, 49, 50, 51, 52, 53, 54, 55]
-      },
-      'Uint8Array': {
+      }
+    }
+  };
+
+  if (!(typeof JS_SHA256_NO_ARRAY_BUFFER === 'boolean' && JS_SHA256_NO_ARRAY_BUFFER)) {
+    testCases.sha256.Uint8Array = {
+      '182889f925ae4e5cc37118ded6ed87f7bdc7cab5ec5e78faef2e50048999473f': new Uint8Array([211, 212]),
+      'd7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592': new Uint8Array([84, 104, 101, 32, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 32, 106, 117, 109, 112, 115, 32, 111, 118, 101, 114, 32, 116, 104, 101, 32, 108, 97, 122, 121, 32, 100, 111, 103])
+    };
+    testCases.sha256.Int8Array = {
+      'd7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592': new Int8Array([84, 104, 101, 32, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 32, 106, 117, 109, 112, 115, 32, 111, 118, 101, 114, 32, 116, 104, 101, 32, 108, 97, 122, 121, 32, 100, 111, 103])
+    };
+    testCases.sha256.ArrayBuffer = {
+      'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855': new ArrayBuffer(0),
+      '6e340b9cffb37a989ca544e6bb780a2c78901d3fb33738768511a30617afa01d': new ArrayBuffer(1)
+    };
+    testCases.sha224.Uint8Array = {
       'e17541396a3ecd1cd5a2b968b84e597e8eae3b0ea3127963bf48dd3b': new Uint8Array([211, 212]),
       '730e109bd7a8a32b1cb9d9a09aa2325d2430587ddbc0c38bad911525': new Uint8Array([84, 104, 101, 32, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 32, 106, 117, 109, 112, 115, 32, 111, 118, 101, 114, 32, 116, 104, 101, 32, 108, 97, 122, 121, 32, 100, 111, 103])    
-      },
-      'Int8Array': {
+    };
+    testCases.sha224.Int8Array = {
       '730e109bd7a8a32b1cb9d9a09aa2325d2430587ddbc0c38bad911525': new Int8Array([84, 104, 101, 32, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 32, 106, 117, 109, 112, 115, 32, 111, 118, 101, 114, 32, 116, 104, 101, 32, 108, 97, 122, 121, 32, 100, 111, 103])
-      },
-      'ArrayBuffer': {
+    };
+    testCases.sha224.ArrayBuffer = {
       'd14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f': new ArrayBuffer(0),
       'fff9292b4201617bdc4d3053fce02734166a683d7d858a7f5f59b073': new ArrayBuffer(1),
-      }
-    }
     };
+  }
 
-  var errorTestCases = [null, undefined, { length: 0 }, 0, 1, false, true, NaN, Infinity, function () {}];
-
-  if (typeof process == 'object') {
-    testCases.sha256['Buffer'] = {
+  if (typeof BUFFER === 'boolean' && BUFFER) {
+    testCases.sha256.Buffer = {
       'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855': new Buffer(0),
       'd7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592': new Buffer(new Uint8Array([84, 104, 101, 32, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 32, 106, 117, 109, 112, 115, 32, 111, 118, 101, 114, 32, 116, 104, 101, 32, 108, 97, 122, 121, 32, 100, 111, 103]))
     };
-    testCases.sha224['Buffer'] = {
+    testCases.sha224.Buffer = {
       'd14a028c2a3a2bc9476102bb288234c415a2b01f828ea62ac5b3e42f': new Buffer(0),
       '730e109bd7a8a32b1cb9d9a09aa2325d2430587ddbc0c38bad911525': new Buffer(new Uint8Array([84, 104, 101, 32, 113, 117, 105, 99, 107, 32, 98, 114, 111, 119, 110, 32, 102, 111, 120, 32, 106, 117, 109, 112, 115, 32, 111, 118, 101, 114, 32, 116, 104, 101, 32, 108, 97, 122, 121, 32, 100, 111, 103]))
     };
   }
 
+  var errorTestCases = [null, undefined, { length: 0 }, 0, 1, false, true, NaN, Infinity, function () {}];
+
   function runTestCases(name, algorithm) {
     var methods = [
       {

tests/worker-test.js

@@ -0,0 +1,21 @@
+(function (Worker, WORKER, SOURCE) {
+  var cases = {
+    'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855': '',
+    'd7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592': 'The quick brown fox jumps over the lazy dog',
+    'ef537f25c895bfa782526529a9b63d97aa631564d5d789c2b765448c8635fb6c': 'The quick brown fox jumps over the lazy dog.'
+  };
+
+  describe('#sha256', function () {
+    Object.keys(cases).forEach(function (hash) {
+      it('should be equal', function (done) {
+        var worker = new Worker(WORKER);
+        worker.onmessage = function(event) {
+          expect(event.data).to.be(hash);
+          done();
+        };
+        worker.postMessage(SOURCE);
+        worker.postMessage(cases[hash]);
+      });
+    });
+  });
+})(Worker, WORKER, SOURCE);

tests/worker.html

@@ -0,0 +1,26 @@
+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>SHA256</title>
+  <link rel="stylesheet" href="../node_modules/mocha/mocha.css">
+  <script src="../node_modules/mocha/mocha.js"></script>
+  <script src="../node_modules/expect.js/index.js"></script>
+  <script src="../src/sha256.js"></script>
+</head>
+<body>
+  <div id="mocha"></div>
+  <script>
+    WORKER = 'worker.js';
+    SOURCE = '../src/sha256.js';
+    mocha.setup('bdd');
+  </script>
+  <script src="worker-test.js"></script>
+  <script>
+    mocha.checkLeaks();
+    mocha.run();
+  </script>
+  <script>
+  </script>
+</body>
+</html>

tests/worker.js

@@ -0,0 +1,12 @@
+var imported = false;
+onmessage = function(e) {
+  if (imported) {
+    postMessage(sha256(e.data));
+    if (typeof exports !== 'undefined') {
+      imported = false;
+    }
+  } else {
+    imported = true;
+    importScripts(e.data);
+  }
+}