Added

- TypeScript definitions.
- clone method.

Changed
- throw error if update after finalize

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Change Log
 
+## v0.8.0 / 2018-08-05
+### Added
+- TypeScript definitions.
+- clone method.
+
+### Changed
+- throw error if update after finalize
+
 ## v0.7.1 / 2017-12-21
 ### Fixed
 - incorrect result when first bit is 1 of bytes.

LICENSE.txt

@@ -1,4 +1,4 @@
-Copyright 2014-2017 Chen, Yi-Cyuan
+Copyright 2014-2018 Chen, Yi-Cyuan
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the

README.md

@@ -5,6 +5,9 @@
 [![NPM](https://nodei.co/npm/js-sha512.png?stars&downloads)](https://nodei.co/npm/js-sha512/)  
 A simple SHA-512, SHA-384, SHA-512/224, SHA-512/256 hash functions for JavaScript supports UTF-8 encoding.
 
+## Notice
+* v0.8.0+ will throw an error if try to update hash after finalize.
+
 ## Demo
 [SHA512 Online](http://emn178.github.io/online-tools/sha512.html)  
 [SHA384 Online](http://emn178.github.io/online-tools/sha384.html)  
@@ -32,13 +35,29 @@ sha384('Message to hash');
 sha512_256('Message to hash');
 sha512_224('Message to hash');
 
+// Support ArrayBuffer output
+var arrayBuffer = sha512.arrayBuffer('Message to hash');
+
+// Support Array output
+var bytes = sha512.digest('Message to hash');
+var bytes = sha512.array('Message to hash');
+
+// update hash
+var hash = sha512.update('Message to hash');
+hash.update('Message2 to hash');
+hash.hex();
+
+// or to use create
 var hash = sha512.create();
 hash.update('Message to hash');
 hash.hex();
 
-var hash2 = sha512.update('Message to hash');
+// clone
-hash2.update('Message2 to hash');
+var hash = sha512.update('Message to hash');
-hash2.array();
+var hash2 = hash.clone();
+hash2.hex();
+hash.update('Message2 to hash');
+hash.hex();
 
 // HMAC
 sha512.hmac('key', 'Message to hash');

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "js-sha512",
-  "version": "0.7.1",
+  "version": "0.8.0",
   "main": ["src/sha512.js"],
   "ignore": [
     "samples",

index.d.ts

@@ -0,0 +1,151 @@
+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 Hmac {
+  /**
+   * Computes a Hash-based message authentication code (HMAC) using a secret key
+   *
+   * @param secretKey The Secret Key
+   * @param message The message you want to hash.
+   */
+  (secretKey: string, message: Message): string;
+
+  /**
+   * Create a hash object using a secret key.
+   *
+   * @param secretKey The Secret Key
+   */
+  create(secretKey: string): Hasher;
+
+  /**
+   * Create a hash object and hash message using a secret key
+   *
+   * @param secretKey The Secret Key
+   * @param message The message you want to hash.
+   */
+  update(secretKey: string, message: Message): Hasher;
+
+  /**
+   * Return hash in hex string.
+   *
+   * @param secretKey The Secret Key
+   * @param message The message you want to hash.
+   */
+  hex(secretKey: string, message: Message): string;
+
+  /**
+   * Return hash in ArrayBuffer.
+   *
+   * @param secretKey The Secret Key
+   * @param message The message you want to hash.
+   */
+  arrayBuffer(secretKey: string, message: Message): ArrayBuffer;
+
+  /**
+   * Return hash in integer array.
+   *
+   * @param secretKey The Secret Key
+   * @param message The message you want to hash.
+   */
+  digest(secretKey: string, message: Message): number[];
+
+  /**
+   * Return hash in integer array.
+   *
+   * @param secretKey The Secret Key
+   * @param message The message you want to hash.
+   */
+  array(secretKey: string, message: Message): number[];
+}
+
+interface Hash {
+  /**
+   * Hash and return hex string.
+   *
+   * @param message The message you want to hash.
+   */
+  (message: Message): string;
+
+  /**
+   * Hash and return hex string.
+   *
+   * @param message The message you want to hash.
+   */
+  hex(message: Message): string;
+
+  /**
+   * Hash and return ArrayBuffer.
+   *
+   * @param message The message you want to hash.
+   */
+  arrayBuffer(message: Message): ArrayBuffer;
+
+  /**
+   * Hash and return integer array.
+   *
+   * @param message The message you want to hash.
+   */
+  digest(message: Message): number[];
+
+  /**
+   * Hash and return integer array.
+   *
+   * @param message The message you want to hash.
+   */
+  array(message: Message): number[];
+
+  /**
+   * 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;
+
+  /**
+   * HMAC interface
+   */
+  hmac: Hmac;
+}
+
+export var sha512: Hash;
+export var sha384: Hash;
+export var sha512_256: Hash;
+export var sha512_224: Hash;

package-lock.json

@@ -1,31 +1,68 @@
 {
   "name": "js-sha512",
-  "version": "0.7.1",
+  "version": "0.8.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "balanced-match": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
+      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+      "dev": true
+    },
     "bindings": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.3.0.tgz",
       "integrity": "sha512-DpLh5EzMR2kzvX1KIlVC0VkC3iZtHKTgdtZ0a3pglBZdaQFjt5S9g9xd1lE+YvXyfd6mtCeRnrUfOLYiTMlNSw==",
       "dev": true
     },
-    "commander": {
+    "brace-expansion": {
-      "version": "2.3.0",
+      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-2.3.0.tgz",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha1-/UMOiJgy7DU7ms0d4hfBHLPu+HM=",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "dev": true,
+      "requires": {
+        "balanced-match": "1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "browser-stdout": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
+      "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
       "dev": true
     },
+    "commander": {
+      "version": "2.15.1",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-2.15.1.tgz",
+      "integrity": "sha512-VlfT9F3V0v+jr4yxPc5gg9s62/fIVWsd2Bk2iD435um1NlGMYdVCq+MjcXnhYq2icNOizHr1kK+5TI6H0Hy0ag==",
+      "dev": true
+    },
+    "concat-map": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
+      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
+      "dev": true
+    },
+    "debug": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-3.1.0.tgz",
+      "integrity": "sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==",
+      "dev": true,
+      "requires": {
+        "ms": "2.0.0"
+      }
+    },
     "diff": {
-      "version": "1.4.0",
+      "version": "3.5.0",
-      "resolved": "https://registry.npmjs.org/diff/-/diff-1.4.0.tgz",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-3.5.0.tgz",
-      "integrity": "sha1-fyjS657nsVqX79ic5j3P2qPMur8=",
+      "integrity": "sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA==",
       "dev": true
     },
     "escape-string-regexp": {
-      "version": "1.0.2",
+      "version": "1.0.5",
-      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.2.tgz",
+      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
-      "integrity": "sha1-Tbwv5nTnGUnK8/smlc5/LcHZqNE=",
+      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
       "dev": true
     },
     "expect.js": {
@@ -34,73 +71,67 @@
       "integrity": "sha1-sKWaDS7/VDdUTr8M6qYBWEHQm1s=",
       "dev": true
     },
+    "fs.realpath": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
+      "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
+      "dev": true
+    },
     "glob": {
-      "version": "3.2.3",
+      "version": "7.1.2",
-      "resolved": "https://registry.npmjs.org/glob/-/glob-3.2.3.tgz",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.2.tgz",
-      "integrity": "sha1-4xPusknHr/qlxHUoaw4RW1mDlGc=",
+      "integrity": "sha512-MJTUg1kjuLeQCJ+ccE4Vpa6kKVXkPYJ2mOCQyUuKLcLQsdrMCpBPUi8qVE6+YuaJkozeA9NusTAw3hLr8Xe5EQ==",
       "dev": true,
       "requires": {
-        "graceful-fs": "2.0.3",
+        "fs.realpath": "1.0.0",
+        "inflight": "1.0.6",
         "inherits": "2.0.3",
-        "minimatch": "0.2.14"
+        "minimatch": "3.0.4",
+        "once": "1.4.0",
+        "path-is-absolute": "1.0.1"
       }
     },
-    "graceful-fs": {
+    "growl": {
-      "version": "2.0.3",
+      "version": "1.10.5",
-      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-2.0.3.tgz",
+      "resolved": "https://registry.npmjs.org/growl/-/growl-1.10.5.tgz",
-      "integrity": "sha1-fNLNsiiko/Nule+mzBQt59GhNtA=",
+      "integrity": "sha512-qBr4OuELkhPenW6goKVXiv47US3clb3/IbuWF9KNKEijAy9oeHxU9IgzjvJhHkUzhaj7rOUD7+YGWqUjLp5oSA==",
       "dev": true
     },
-    "growl": {
+    "has-flag": {
-      "version": "1.8.1",
+      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/growl/-/growl-1.8.1.tgz",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
-      "integrity": "sha1-Sy3sjZB+k9szZiTc7AGDUC+MlCg=",
+      "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
       "dev": true
     },
+    "he": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/he/-/he-1.1.1.tgz",
+      "integrity": "sha1-k0EP0hsAlzUVH4howvJx80J+I/0=",
+      "dev": true
+    },
+    "inflight": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
+      "integrity": "sha1-Sb1jMdfQLQwJvJEKEHW6gWW1bfk=",
+      "dev": true,
+      "requires": {
+        "once": "1.4.0",
+        "wrappy": "1.0.2"
+      }
+    },
     "inherits": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
       "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=",
       "dev": true
     },
-    "jade": {
-      "version": "0.26.3",
-      "resolved": "https://registry.npmjs.org/jade/-/jade-0.26.3.tgz",
-      "integrity": "sha1-jxDXl32NefL2/4YqgbBRPMslaGw=",
-      "dev": true,
-      "requires": {
-        "commander": "0.6.1",
-        "mkdirp": "0.3.0"
-      },
-      "dependencies": {
-        "commander": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/commander/-/commander-0.6.1.tgz",
-          "integrity": "sha1-+mihT2qUXVTbvlDYzbMyDp47GgY=",
-          "dev": true
-        },
-        "mkdirp": {
-          "version": "0.3.0",
-          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.3.0.tgz",
-          "integrity": "sha1-G79asbqCevI1dRQ0kEJkVfSB/h4=",
-          "dev": true
-        }
-      }
-    },
-    "lru-cache": {
-      "version": "2.7.3",
-      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-2.7.3.tgz",
-      "integrity": "sha1-bUUk6LlV+V1PW1iFHOId1y+06VI=",
-      "dev": true
-    },
     "minimatch": {
-      "version": "0.2.14",
+      "version": "3.0.4",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-0.2.14.tgz",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
-      "integrity": "sha1-x054BXT2PG+aCQ6Q775u9TpqdWo=",
+      "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
       "dev": true,
       "requires": {
-        "lru-cache": "2.7.3",
+        "brace-expansion": "1.1.11"
-        "sigmund": "1.0.1"
       }
     },
     "minimist": {
@@ -110,47 +141,38 @@
       "dev": true
     },
     "mkdirp": {
-      "version": "0.5.0",
+      "version": "0.5.1",
-      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.0.tgz",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
-      "integrity": "sha1-HXMHam35hs2TROFecfzAWkyavxI=",
+      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
       "dev": true,
       "requires": {
         "minimist": "0.0.8"
       }
     },
     "mocha": {
-      "version": "2.3.4",
+      "version": "5.2.0",
-      "resolved": "https://registry.npmjs.org/mocha/-/mocha-2.3.4.tgz",
+      "resolved": "https://registry.npmjs.org/mocha/-/mocha-5.2.0.tgz",
-      "integrity": "sha1-himm+wRPLSJapLgaKuLQAWmesmY=",
+      "integrity": "sha512-2IUgKDhc3J7Uug+FxMXuqIyYzH7gJjXECKe/w43IGgQHTSj3InJi+yAA7T24L9bQMRKiUEHxEX37G5JpVUGLcQ==",
       "dev": true,
       "requires": {
-        "commander": "2.3.0",
+        "browser-stdout": "1.3.1",
-        "debug": "2.2.0",
+        "commander": "2.15.1",
-        "diff": "1.4.0",
+        "debug": "3.1.0",
-        "escape-string-regexp": "1.0.2",
+        "diff": "3.5.0",
-        "glob": "3.2.3",
+        "escape-string-regexp": "1.0.5",
-        "growl": "1.8.1",
+        "glob": "7.1.2",
-        "jade": "0.26.3",
+        "growl": "1.10.5",
-        "mkdirp": "0.5.0",
+        "he": "1.1.1",
-        "supports-color": "1.2.0"
+        "minimatch": "3.0.4",
-      },
+        "mkdirp": "0.5.1",
-      "dependencies": {
+        "supports-color": "5.4.0"
-        "debug": {
-          "version": "2.2.0",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-2.2.0.tgz",
-          "integrity": "sha1-+HBX6ZWxofauaklgZkE3vFbwOdo=",
-          "dev": true,
-          "requires": {
-            "ms": "0.7.1"
       }
     },
     "ms": {
-          "version": "0.7.1",
+      "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.1.tgz",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
-          "integrity": "sha1-nNE8A62/8ltl7/3nzoZO6VIBcJg=",
+      "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
       "dev": true
-        }
-      }
     },
     "nan": {
       "version": "2.7.0",
@@ -1752,18 +1774,27 @@
         }
       }
     },
+    "once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "dev": true,
+      "requires": {
+        "wrappy": "1.0.2"
+      }
+    },
+    "path-is-absolute": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
+      "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
+      "dev": true
+    },
     "requirejs": {
       "version": "2.3.5",
       "resolved": "https://registry.npmjs.org/requirejs/-/requirejs-2.3.5.tgz",
       "integrity": "sha512-svnO+aNcR/an9Dpi44C7KSAy5fFGLtmPbaaCeQaklUz8BQhS64tWWIIlvEA5jrWICzlO/X9KSzSeXFnZdBu8nw==",
       "dev": true
     },
-    "sigmund": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/sigmund/-/sigmund-1.0.1.tgz",
-      "integrity": "sha1-P/IfGYytIXX587eBhT/ZTQ0ZtZA=",
-      "dev": true
-    },
     "source-map": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -1771,10 +1802,13 @@
       "dev": true
     },
     "supports-color": {
-      "version": "1.2.0",
+      "version": "5.4.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-1.2.0.tgz",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.4.0.tgz",
-      "integrity": "sha1-/x7R5hFp0Gs88tWI4YixjYhH4X4=",
+      "integrity": "sha512-zjaXglF5nnWpsq470jSv6P9DwPvgLkuapYmfDm3JWOm0vkNTVF2tI4UrN2r6jH1qM/uc/WtxYY1hYoA2dOKj5w==",
-      "dev": true
+      "dev": true,
+      "requires": {
+        "has-flag": "3.0.0"
+      }
     },
     "uglify-js": {
       "version": "3.2.2",
@@ -1803,6 +1837,12 @@
         "bindings": "1.3.0",
         "nan": "2.7.0"
       }
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "dev": true
     }
   }
 }

package.json

@@ -1,19 +1,19 @@
 {
   "name": "js-sha512",
-  "version": "0.7.1",
+  "version": "0.8.0",
   "description": "This is a simple SHA-512, SHA-384, SHA-512/224, SHA-512/256 hash functions for JavaScript supports UTF-8 encoding.",
   "main": "src/sha512.js",
   "devDependencies": {
     "expect.js": "~0.3.1",
-    "mocha": "~2.3.4",
+    "mocha": "~5.2.0",
     "nyc": "^11.3.0",
     "requirejs": "^2.1.22",
     "uglify-js": "^3.1.9",
     "webworker-threads": "^0.7.11"
   },
   "scripts": {
-    "test": "nyc mocha tests/node-test.js",
+    "test": "nyc mocha tests/node-test.js --exit",
-    "report": "nyc --reporter=html --reporter=text mocha tests/node-test.js",
+    "report": "nyc --reporter=html --reporter=text mocha tests/node-test.js --exit",
     "coveralls": "nyc report --reporter=text-lcov | coveralls",
     "build": "uglifyjs src/sha512.js -c -m eval --comments -o build/sha512.min.js"
   },

src/sha512.js

@@ -1,16 +1,17 @@
 /*
  * [js-sha512]{@link https://github.com/emn178/js-sha512}
  *
- * @version 0.7.1
+ * @version 0.8.0
  * @author Chen, Yi-Cyuan [emn178@gmail.com]
- * @copyright Chen, Yi-Cyuan 2014-2017
+ * @copyright Chen, Yi-Cyuan 2014-2018
  * @license MIT
  */
 /*jslint bitwise: true */
 (function () {
   'use strict';
 
-  var ERROR = 'input is invalid type';
+  var INPUT_ERROR = 'input is invalid type';
+  var FINALIZE_ERROR = 'finalize already called';
   var WINDOW = typeof window === 'object';
   var root = WINDOW ? window : {};
   if (root.JS_SHA512_NO_WINDOW) {
@@ -222,22 +223,22 @@
 
   Sha512.prototype.update = function (message) {
     if (this.finalized) {
-      return;
+      throw new Error(FINALIZE_ERROR);
     }
     var notString, type = typeof message;
     if (type !== 'string') {
       if (type === 'object') {
         if (message === null) {
-          throw ERROR;
+          throw new Error(INPUT_ERROR);
         } else if (ARRAY_BUFFER && message.constructor === ArrayBuffer) {
           message = new Uint8Array(message);
         } else if (!Array.isArray(message)) {
           if (!ARRAY_BUFFER || !ArrayBuffer.isView(message)) {
-            throw ERROR;
+            throw new Error(INPUT_ERROR);
           }
         }
       } else {
-        throw ERROR;
+        throw new Error(INPUT_ERROR);
       }
       notString = true;
     }
@@ -796,21 +797,40 @@
     return buffer;
   };
 
+  Sha512.prototype.clone = function () {
+    var hash = new Sha512(this.bits, false);
+    this.copyTo(hash);
+    return hash;
+  };
+
+  Sha512.prototype.copyTo = function (hash) {
+    var i = 0, attrs = [
+      'h0h', 'h0l', 'h1h', 'h1l', 'h2h', 'h2l', 'h3h', 'h3l', 'h4h', 'h4l', 'h5h', 'h5l', 'h6h', 'h6l', 'h7h', 'h7l',
+      'start', 'bytes', 'hBytes', 'finalized', 'hashed', 'lastByteIndex'
+    ];
+    for (i = 0; i < attrs.length; ++i) {
+      hash[attrs[i]] = this[attrs[i]];
+    }
+    for (i = 0; i < this.blocks.length; ++i) {
+      hash.blocks[i] = this.blocks[i];
+    }
+  };
+
   function HmacSha512(key, bits, sharedMemory) {
     var notString, type = typeof key;
     if (type !== 'string') {
       if (type === 'object') {
         if (key === null) {
-          throw ERROR;
+          throw new Error(INPUT_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;
+            throw new Error(INPUT_ERROR);
           }
         }
       } else {
-        throw ERROR;
+        throw new Error(INPUT_ERROR);
       }
       notString = true;
     }
@@ -871,6 +891,16 @@
     }
   };
 
+  HmacSha512.prototype.clone = function () {
+    var hash = new HmacSha512([], this.bits, false);
+    this.copyTo(hash);
+    hash.inner = this.inner;
+    for (var i = 0; i < this.oKeyPad.length; ++i) {
+      hash.oKeyPad[i] = this.oKeyPad[i];
+    }
+    return hash;
+  };
+
   var exports = createMethod(512);
   exports.sha512 = exports;
   exports.sha384 = createMethod(384);

tests/hmac-test.js

@@ -203,9 +203,18 @@
         call: function (key, message) {
           var hash = algorithm.update(key, message);
           hash.hex();
-          hash.update(message);
+          hash.finalize();
           return hash.hex();
         }
+      },
+      {
+        name: 'clone',
+        call: function (key, message) {
+          var hash = algorithm.update(key, message);
+          var hash2 = hash.clone();
+          hash.update('any');
+          return hash2.hex();
+        }
       }
     ];
 
@@ -250,6 +259,16 @@
         });
       });
 
+      context('when update after finalize', function () {
+        it('should throw error', function () {
+          expect(function () {
+            var hash = algorithm.update('key', 'any');
+            hash.hex();
+            hash.update('any');
+          }).to.throwError(/finalize already called/);
+        });
+      });
+
       describe('#' + name, function () {
         errorTestCases.forEach(function (testCase) {
           context('when ' + testCase, function () {

tests/test.js

@@ -260,9 +260,18 @@
         call: function (message) {
           var hash = algorithm.update(message);
           hash.hex();
-          hash.update(message);
+          hash.finalize();
           return hash.hex();
         }
+      },
+      {
+        name: 'clone',
+        call: function (message) {
+          var hash = algorithm.update(message);
+          var hash2 = hash.clone();
+          hash.update('any');
+          return hash2.hex();
+        }
       }
     ];
 
@@ -317,6 +326,16 @@
         });
       });
 
+      context('when update after finalize', function () {
+        it('should throw error', function () {
+          expect(function () {
+            var hash = algorithm.update('any');
+            hash.hex();
+            hash.update('any');
+          }).to.throwError(/finalize already called/);
+        });
+      });
+
       context('when large size', function () {
         var hash = algorithm.create();
         hash.bytes = 4294967295;