diff --git a/.eslintrc b/.eslintrc
index a755cdb..ff010df 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -1,3 +1,26 @@
 {
-  "extends": ["standard"]
+  "root": true,
+
+  "extends": "@ljharb",
+
+  "rules": {
+    "func-style": "off",
+  },
+
+  "globals": {
+    "Uint8Array": false,
+    "Uint16Array": false,
+  },
+
+  "overrides": [
+    {
+      "files": [
+        "./index.js",
+        "./test/index.js",
+      ],
+      "rules": {
+        "no-underscore-dangle": "warn",
+      },
+    },
+  ],
 }
diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
new file mode 100644
index 0000000..fbfd907
--- /dev/null
+++ b/.github/FUNDING.yml
@@ -0,0 +1,12 @@
+# These are supported funding model platforms
+
+github: [ljharb]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: npm/cipher-base
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
diff --git a/.github/workflows/node-aught.yml b/.github/workflows/node-aught.yml
new file mode 100644
index 0000000..1af040e
--- /dev/null
+++ b/.github/workflows/node-aught.yml
@@ -0,0 +1,11 @@
+name: 'Tests: node.js < 10'
+
+on: [pull_request, push]
+
+jobs:
+  tests:
+    uses: ljharb/actions/.github/workflows/node.yml@main
+    with:
+      range: '0.10 - 9'
+      type: minors
+      command: npm run tests-only
diff --git a/.github/workflows/node-pretest.yml b/.github/workflows/node-pretest.yml
new file mode 100644
index 0000000..765edf7
--- /dev/null
+++ b/.github/workflows/node-pretest.yml
@@ -0,0 +1,7 @@
+name: 'Tests: pretest/posttest'
+
+on: [pull_request, push]
+
+jobs:
+  tests:
+    uses: ljharb/actions/.github/workflows/pretest.yml@main
diff --git a/.github/workflows/node-tens.yml b/.github/workflows/node-tens.yml
new file mode 100644
index 0000000..1f55be0
--- /dev/null
+++ b/.github/workflows/node-tens.yml
@@ -0,0 +1,11 @@
+name: 'Tests: node.js >= 10'
+
+on: [pull_request, push]
+
+jobs:
+  tests:
+    uses: ljharb/actions/.github/workflows/node.yml@main
+    with:
+      range: '>= 10'
+      type: minors
+      command: npm run tests-only
diff --git a/.github/workflows/node-twenties.yml b/.github/workflows/node-twenties.yml
new file mode 100644
index 0000000..209e157
--- /dev/null
+++ b/.github/workflows/node-twenties.yml
@@ -0,0 +1,14 @@
+name: 'Tests: node.js >= 20'
+
+on: [pull_request, push]
+
+permissions:
+  contents: read
+
+jobs:
+  tests:
+    uses: ljharb/actions/.github/workflows/node.yml@main
+    with:
+      range: '>= 20'
+      type: minors
+      command: npm run tests-only
diff --git a/.github/workflows/rebase.yml b/.github/workflows/rebase.yml
new file mode 100644
index 0000000..8b2a811
--- /dev/null
+++ b/.github/workflows/rebase.yml
@@ -0,0 +1,22 @@
+name: Automatic Rebase
+
+on: [pull_request_target]
+
+permissions:
+  contents: read
+
+jobs:
+  _:
+    permissions:
+      contents: write  # for ljharb/rebase to push code to rebase
+      pull-requests: read  # for ljharb/rebase to get info about PR
+
+    name: "Automatic Rebase"
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ljharb/rebase@master
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/require-allow-edits.yml b/.github/workflows/require-allow-edits.yml
new file mode 100644
index 0000000..7b842f8
--- /dev/null
+++ b/.github/workflows/require-allow-edits.yml
@@ -0,0 +1,12 @@
+name: Require “Allow Edits”
+
+on: [pull_request_target]
+
+jobs:
+  _:
+    name: "Require “Allow Edits”"
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: ljharb/require-allow-edits@main
diff --git a/.gitignore b/.gitignore
index 3c3629e..34aaa91 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,8 @@
 node_modules
+
+# Only apps should have lockfiles
+npm-shrinkwrap.json
+package-lock.json
+yarn.lock
+
+.npmignore
diff --git a/.npmrc b/.npmrc
new file mode 100644
index 0000000..eacea13
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1,3 @@
+package-lock=false
+allow-same-version=true
+message=v%s
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index eb83acd..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-language: node_js
-node_js:
-  - "0.11"
-  - "0.10"
-  - "0.12"
-  - "iojs"
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..a99ec0d
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,66 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [v1.0.6](https://github.com/browserify/cipher-base/compare/v1.0.5...v1.0.6) - 2024-11-26
+
+### Commits
+
+- [Fix] io.js 3.0 - Node.js 5.3 typed array support [`b7ddd2a`](https://github.com/browserify/cipher-base/commit/b7ddd2ac24e65cc47befc1e0eb5026422f8ab037)
+
+## [v1.0.5](https://github.com/browserify/cipher-base/compare/v1.0.4...v1.0.5) - 2024-11-17
+
+### Commits
+
+- [Tests] standard -&gt; eslint, make test dir, etc [`ae02fd6`](https://github.com/browserify/cipher-base/commit/ae02fd6624c41ac4ac18077be797111d1955bc76)
+- [Tests] migrate from travis to GHA [`66387d7`](https://github.com/browserify/cipher-base/commit/66387d71461287ad9067bb1bcbfdc47403a33ee7)
+- [meta] fix package.json indentation [`5c02918`](https://github.com/browserify/cipher-base/commit/5c02918ac58c875ed36913c2dc3e1043f4d1c99c)
+- [Fix] return valid values on multi-byte-wide TypedArray input [`8fd1364`](https://github.com/browserify/cipher-base/commit/8fd136432ca298a664f5637629cf2b42a6c7f294)
+- [meta] add `auto-changelog` [`88dc806`](https://github.com/browserify/cipher-base/commit/88dc806806d3dc41444dbf639c87c00f82c949b3)
+- [meta] add `npmignore` and `safe-publish-latest` [`7a137d7`](https://github.com/browserify/cipher-base/commit/7a137d749ce7ea7ea56b9c096844b1b8ab723f61)
+- Only apps should have lockfiles [`42528f2`](https://github.com/browserify/cipher-base/commit/42528f291db16bf2e7d5f831ebe2ad87fd0b1f42)
+- [Deps] update `inherits`, `safe-buffer` [`0e7a2d9`](https://github.com/browserify/cipher-base/commit/0e7a2d9a33a391e82fa9cf512d6e25cc91ab8613)
+- [meta] add missing `engines.node` [`f2dc13e`](https://github.com/browserify/cipher-base/commit/f2dc13e47bbcf3c873db9a9e0f83e5f29d0783fe)
+
+## [v1.0.4](https://github.com/browserify/cipher-base/compare/v1.0.3...v1.0.4) - 2017-07-06
+
+### Merged
+
+- Safe Buffer & License [`#8`](https://github.com/browserify/cipher-base/pull/8)
+- fix break in node 8 [`#9`](https://github.com/browserify/cipher-base/pull/9)
+
+### Commits
+
+- use safe-buffer [`193bbeb`](https://github.com/browserify/cipher-base/commit/193bbeb0d60ff206b072d4e18b32fcf150eb0fad)
+- add MIT LICENSE [`a9fb6e3`](https://github.com/browserify/cipher-base/commit/a9fb6e316c25b25d2bd04fa5b6eb748318bdcb04)
+- index: add missing Buffer.alloc [`2397a9e`](https://github.com/browserify/cipher-base/commit/2397a9e0db33b2f3d6abbd89f01db1c066804a91)
+- rename README to README, add .gitignore [`9345e1d`](https://github.com/browserify/cipher-base/commit/9345e1d21fd10555bc4f39ccae5512ca0202c5f6)
+
+## [v1.0.3](https://github.com/browserify/cipher-base/compare/v1.0.2...v1.0.3) - 2016-09-13
+
+### Merged
+
+- closure-compiler fix - final is a reserved word [`#4`](https://github.com/browserify/cipher-base/pull/4)
+
+## [v1.0.2](https://github.com/browserify/cipher-base/compare/v1.0.1...v1.0.2) - 2015-10-23
+
+### Merged
+
+- fix up typo in README [`#1`](https://github.com/browserify/cipher-base/pull/1)
+
+### Commits
+
+- Update api-methods. [`c4a7156`](https://github.com/browserify/cipher-base/commit/c4a7156c7beedb524ce5005374d2fd1327fa3ca4)
+- travis [`a5873f7`](https://github.com/browserify/cipher-base/commit/a5873f7dbfe542d7ec28bcb3e306096d1d2b951c)
+- Add api-methods [`208b338`](https://github.com/browserify/cipher-base/commit/208b33841d3e8a6f5322e54bdf442e1ee0d77590)
+- Update error messages [`dc19a24`](https://github.com/browserify/cipher-base/commit/dc19a24119786518c1c835d948e36ddae3bf3adb)
+
+## v1.0.1 - 2015-09-26
+
+### Commits
+
+- first [`8fbd9e7`](https://github.com/browserify/cipher-base/commit/8fbd9e7654d384b578e63d12e0311ae16dc07741)
+- fix error in 0.10 [`61491fe`](https://github.com/browserify/cipher-base/commit/61491fe31fcc9bee0901f93b26cee6eaaca07575)
diff --git a/index.js b/index.js
index 6728005..804c108 100644
--- a/index.js
+++ b/index.js
@@ -1,99 +1,167 @@
-var Buffer = require('safe-buffer').Buffer
-var Transform = require('stream').Transform
-var StringDecoder = require('string_decoder').StringDecoder
-var inherits = require('inherits')
-
-function CipherBase (hashMode) {
-  Transform.call(this)
-  this.hashMode = typeof hashMode === 'string'
-  if (this.hashMode) {
-    this[hashMode] = this._finalOrDigest
-  } else {
-    this.final = this._finalOrDigest
-  }
-  if (this._final) {
-    this.__final = this._final
-    this._final = null
-  }
-  this._decoder = null
-  this._encoding = null
+'use strict';
+
+var Buffer = require('safe-buffer').Buffer;
+var Transform = require('stream').Transform;
+var StringDecoder = require('string_decoder').StringDecoder;
+var inherits = require('inherits');
+
+function CipherBase(hashMode) {
+	Transform.call(this);
+	this.hashMode = typeof hashMode === 'string';
+	if (this.hashMode) {
+		this[hashMode] = this._finalOrDigest;
+	} else {
+		this['final'] = this._finalOrDigest;
+	}
+	if (this._final) {
+		this.__final = this._final;
+		this._final = null;
+	}
+	this._decoder = null;
+	this._encoding = null;
 }
-inherits(CipherBase, Transform)
+inherits(CipherBase, Transform);
 
-CipherBase.prototype.update = function (data, inputEnc, outputEnc) {
-  if (typeof data === 'string') {
-    data = Buffer.from(data, inputEnc)
-  }
+var useUint8Array = typeof Uint8Array !== 'undefined';
+var useArrayBuffer = typeof ArrayBuffer !== 'undefined'
+	&& typeof Uint8Array !== 'undefined'
+	&& ArrayBuffer.isView
+	&& (Buffer.prototype instanceof Uint8Array || Buffer.TYPED_ARRAY_SUPPORT);
+
+function toBuffer(data, encoding) {
+	/*
+	 * No need to do anything for exact instance
+	 * This is only valid when safe-buffer.Buffer === buffer.Buffer, i.e. when Buffer.from/Buffer.alloc existed
+	 */
+	if (data instanceof Buffer) {
+		return data;
+	}
+
+	// Convert strings to Buffer
+	if (typeof data === 'string') {
+		return Buffer.from(data, encoding);
+	}
 
-  var outData = this._update(data)
-  if (this.hashMode) return this
+	/*
+	 * Wrap any TypedArray instances and DataViews
+	 * Makes sense only on engines with full TypedArray support -- let Buffer detect that
+	 */
+	if (useArrayBuffer && ArrayBuffer.isView(data)) {
+		// Bug in Node.js <6.3.1, which treats this as out-of-bounds
+		if (data.byteLength === 0) {
+			return Buffer.alloc(0);
+		}
 
-  if (outputEnc) {
-    outData = this._toString(outData, outputEnc)
-  }
+		var res = Buffer.from(data.buffer, data.byteOffset, data.byteLength);
+		/*
+		 * Recheck result size, as offset/length doesn't work on Node.js <5.10
+		 * We just go to Uint8Array case if this fails
+		 */
+		if (res.byteLength === data.byteLength) {
+			return res;
+		}
+	}
 
-  return outData
+	/*
+	 * Uint8Array in engines where Buffer.from might not work with ArrayBuffer, just copy over
+	 * Doesn't make sense with other TypedArray instances
+	 */
+	if (useUint8Array && data instanceof Uint8Array) {
+		return Buffer.from(data);
+	}
+
+	/*
+	 * Old Buffer polyfill on an engine that doesn't have TypedArray support
+	 * Also, this is from a different Buffer polyfill implementation then we have, as instanceof check failed
+	 * Convert to our current Buffer implementation
+	 */
+	if (
+		Buffer.isBuffer(data)
+			&& data.constructor
+			&& typeof data.constructor.isBuffer === 'function'
+			&& data.constructor.isBuffer(data)
+	) {
+		return Buffer.from(data);
+	}
+
+	throw new TypeError('The "data" argument must be of type string or an instance of Buffer, TypedArray, or DataView.');
 }
 
-CipherBase.prototype.setAutoPadding = function () {}
+CipherBase.prototype.update = function (data, inputEnc, outputEnc) {
+	var bufferData = toBuffer(data, inputEnc); // asserts correct input type
+	var outData = this._update(bufferData);
+	if (this.hashMode) {
+		return this;
+	}
+
+	if (outputEnc) {
+		outData = this._toString(outData, outputEnc);
+	}
+
+	return outData;
+};
+
+CipherBase.prototype.setAutoPadding = function () {};
 CipherBase.prototype.getAuthTag = function () {
-  throw new Error('trying to get auth tag in unsupported state')
-}
+	throw new Error('trying to get auth tag in unsupported state');
+};
 
 CipherBase.prototype.setAuthTag = function () {
-  throw new Error('trying to set auth tag in unsupported state')
-}
+	throw new Error('trying to set auth tag in unsupported state');
+};
 
 CipherBase.prototype.setAAD = function () {
-  throw new Error('trying to set aad in unsupported state')
-}
+	throw new Error('trying to set aad in unsupported state');
+};
 
 CipherBase.prototype._transform = function (data, _, next) {
-  var err
-  try {
-    if (this.hashMode) {
-      this._update(data)
-    } else {
-      this.push(this._update(data))
-    }
-  } catch (e) {
-    err = e
-  } finally {
-    next(err)
-  }
-}
+	var err;
+	try {
+		if (this.hashMode) {
+			this._update(data);
+		} else {
+			this.push(this._update(data));
+		}
+	} catch (e) {
+		err = e;
+	} finally {
+		next(err);
+	}
+};
 CipherBase.prototype._flush = function (done) {
-  var err
-  try {
-    this.push(this.__final())
-  } catch (e) {
-    err = e
-  }
-
-  done(err)
-}
+	var err;
+	try {
+		this.push(this.__final());
+	} catch (e) {
+		err = e;
+	}
+
+	done(err);
+};
 CipherBase.prototype._finalOrDigest = function (outputEnc) {
-  var outData = this.__final() || Buffer.alloc(0)
-  if (outputEnc) {
-    outData = this._toString(outData, outputEnc, true)
-  }
-  return outData
-}
+	var outData = this.__final() || Buffer.alloc(0);
+	if (outputEnc) {
+		outData = this._toString(outData, outputEnc, true);
+	}
+	return outData;
+};
 
 CipherBase.prototype._toString = function (value, enc, fin) {
-  if (!this._decoder) {
-    this._decoder = new StringDecoder(enc)
-    this._encoding = enc
-  }
+	if (!this._decoder) {
+		this._decoder = new StringDecoder(enc);
+		this._encoding = enc;
+	}
 
-  if (this._encoding !== enc) throw new Error('can\'t switch encodings')
+	if (this._encoding !== enc) {
+		throw new Error('can’t switch encodings');
+	}
 
-  var out = this._decoder.write(value)
-  if (fin) {
-    out += this._decoder.end()
-  }
+	var out = this._decoder.write(value);
+	if (fin) {
+		out += this._decoder.end();
+	}
 
-  return out
-}
+	return out;
+};
 
-module.exports = CipherBase
+module.exports = CipherBase;
diff --git a/package.json b/package.json
index f372599..daef6d8 100644
--- a/package.json
+++ b/package.json
@@ -1,32 +1,62 @@
 {
-  "name": "cipher-base",
-  "version": "1.0.4",
-  "description": "abstract base class for crypto-streams",
-  "main": "index.js",
-  "scripts": {
-    "test": "node test.js | tspec"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/crypto-browserify/cipher-base.git"
-  },
-  "keywords": [
-    "cipher",
-    "stream"
-  ],
-  "author": "Calvin Metcalf <calvin.metcalf@gmail.com>",
-  "license": "MIT",
-  "bugs": {
-    "url": "https://github.com/crypto-browserify/cipher-base/issues"
-  },
-  "homepage": "https://github.com/crypto-browserify/cipher-base#readme",
-  "dependencies": {
-    "inherits": "^2.0.1",
-    "safe-buffer": "^5.0.1"
-  },
-  "devDependencies": {
-    "standard": "^10.0.2",
-    "tap-spec": "^4.1.0",
-    "tape": "^4.2.0"
-  }
+	"name": "cipher-base",
+	"version": "1.0.6",
+	"description": "abstract base class for crypto-streams",
+	"main": "index.js",
+	"scripts": {
+		"prepack": "npmignore --auto --commentLines=autogenerated",
+		"prepublishOnly": "safe-publish-latest",
+		"prepublish": "not-in-publish || npm run prepublishOnly",
+		"lint": "eslint --ext=js,.mjs .",
+		"pretest": "npm run lint",
+		"test": "npm run tests-only",
+		"tests-only": "tape 'test/**/*.js'",
+		"posttest": "npx npm@'>=10.2' audit --production",
+		"version": "auto-changelog && git add CHANGELOG.md",
+		"postversion": "auto-changelog && git add CHANGELOG.md && git commit --no-edit --amend && git tag -f \"v$(node -e \"console.log(require('./package.json').version)\")\""
+	},
+	"repository": {
+		"type": "git",
+		"url": "git+https://github.com/crypto-browserify/cipher-base.git"
+	},
+	"keywords": [
+		"cipher",
+		"stream"
+	],
+	"author": "Calvin Metcalf <calvin.metcalf@gmail.com>",
+	"license": "MIT",
+	"bugs": {
+		"url": "https://github.com/crypto-browserify/cipher-base/issues"
+	},
+	"homepage": "https://github.com/crypto-browserify/cipher-base#readme",
+	"dependencies": {
+		"inherits": "^2.0.4",
+		"safe-buffer": "^5.2.1"
+	},
+	"devDependencies": {
+		"@ljharb/eslint-config": "^21.1.1",
+		"auto-changelog": "^2.5.0",
+		"encoding": "^0.1.13",
+		"eslint": "=8.8.0",
+		"in-publish": "^2.0.1",
+		"npmignore": "^0.3.1",
+		"safe-publish-latest": "^2.0.0",
+		"tape": "^5.9.0"
+	},
+	"publishConfig": {
+		"ignore": [
+			".github/workflows"
+		]
+	},
+	"auto-changelog": {
+		"output": "CHANGELOG.md",
+		"template": "keepachangelog",
+		"unreleased": false,
+		"commitLimit": false,
+		"backfillLimit": false,
+		"hideCredit": true
+	},
+	"engines": {
+		"node": ">= 0.10"
+	}
 }
diff --git a/test.js b/test.js
deleted file mode 100644
index 29d3492..0000000
--- a/test.js
+++ /dev/null
@@ -1,111 +0,0 @@
-var Buffer = require('safe-buffer').Buffer
-var CipherBase = require('./')
-
-var test = require('tape')
-var inherits = require('inherits')
-
-test('basic version', function (t) {
-  function Cipher () {
-    CipherBase.call(this)
-  }
-  inherits(Cipher, CipherBase)
-  Cipher.prototype._update = function (input) {
-    t.ok(Buffer.isBuffer(input))
-    return input
-  }
-  Cipher.prototype._final = function () {
-    // noop
-  }
-  var cipher = new Cipher()
-  var utf8 = 'abc123abcd'
-  var update = cipher.update(utf8, 'utf8', 'base64') + cipher.final('base64')
-  var string = (Buffer.from(update, 'base64')).toString()
-  t.equals(utf8, string)
-  t.end()
-})
-test('hash mode', function (t) {
-  function Cipher () {
-    CipherBase.call(this, 'finalName')
-    this._cache = []
-  }
-  inherits(Cipher, CipherBase)
-  Cipher.prototype._update = function (input) {
-    t.ok(Buffer.isBuffer(input))
-    this._cache.push(input)
-  }
-  Cipher.prototype._final = function () {
-    return Buffer.concat(this._cache)
-  }
-  var cipher = new Cipher()
-  var utf8 = 'abc123abcd'
-  var update = cipher.update(utf8, 'utf8').finalName('base64')
-  var string = (Buffer.from(update, 'base64')).toString()
-
-  t.equals(utf8, string)
-  t.end()
-})
-test('hash mode as stream', function (t) {
-  function Cipher () {
-    CipherBase.call(this, 'finalName')
-    this._cache = []
-  }
-  inherits(Cipher, CipherBase)
-  Cipher.prototype._update = function (input) {
-    t.ok(Buffer.isBuffer(input))
-    this._cache.push(input)
-  }
-  Cipher.prototype._final = function () {
-    return Buffer.concat(this._cache)
-  }
-  var cipher = new Cipher()
-  cipher.on('error', function (e) {
-    t.notOk(e)
-  })
-  var utf8 = 'abc123abcd'
-  cipher.end(utf8, 'utf8')
-  var update = cipher.read().toString('base64')
-  var string = (Buffer.from(update, 'base64')).toString()
-
-  t.equals(utf8, string)
-  t.end()
-})
-
-test('encodings', function (t) {
-  inherits(Cipher, CipherBase)
-  function Cipher () {
-    CipherBase.call(this)
-  }
-  Cipher.prototype._update = function (input) {
-    return input
-  }
-  Cipher.prototype._final = function () {
-    // noop
-  }
-  t.test('mix and match encoding', function (t) {
-    t.plan(2)
-
-    var cipher = new Cipher()
-    cipher.update('foo', 'utf8', 'utf8')
-    t.throws(function () {
-      cipher.update('foo', 'utf8', 'base64')
-    })
-    cipher = new Cipher()
-    cipher.update('foo', 'utf8', 'base64')
-    t.doesNotThrow(function () {
-      cipher.update('foo', 'utf8')
-      cipher.final('base64')
-    })
-  })
-  t.test('handle long uft8 plaintexts', function (t) {
-    t.plan(1)
-    var txt = 'ふっかつ　あきる　すぶり　はやい　つける　まゆげ　たんさん　みんぞく　ねほりはほり　せまい　たいまつばな　ひはん'
-
-    var cipher = new Cipher()
-    var decipher = new Cipher()
-    var enc = decipher.update(cipher.update(txt, 'utf8', 'base64'), 'base64', 'utf8')
-    enc += decipher.update(cipher.final('base64'), 'base64', 'utf8')
-    enc += decipher.final('utf8')
-
-    t.equals(txt, enc)
-  })
-})
diff --git a/test/index.js b/test/index.js
new file mode 100644
index 0000000..8a3ceeb
--- /dev/null
+++ b/test/index.js
@@ -0,0 +1,221 @@
+'use strict';
+
+var Buffer = require('safe-buffer').Buffer;
+var CipherBase = require('../');
+
+var test = require('tape');
+var inherits = require('inherits');
+
+test('basic version', function (t) {
+	function Cipher() {
+		CipherBase.call(this);
+	}
+
+	inherits(Cipher, CipherBase);
+
+	Cipher.prototype._update = function (input) {
+		t.ok(Buffer.isBuffer(input));
+		return input;
+	};
+
+	Cipher.prototype._final = function () {
+		// noop
+	};
+
+	var cipher = new Cipher();
+	var utf8 = 'abc123abcd';
+	var update = cipher.update(utf8, 'utf8', 'base64') + cipher['final']('base64');
+	var string = Buffer.from(update, 'base64').toString();
+
+	t.equals(utf8, string);
+
+	t.end();
+});
+
+test('hash mode', function (t) {
+	function Cipher() {
+		CipherBase.call(this, 'finalName');
+		this._cache = [];
+	}
+	inherits(Cipher, CipherBase);
+	Cipher.prototype._update = function (input) {
+		t.ok(Buffer.isBuffer(input));
+		this._cache.push(input);
+	};
+	Cipher.prototype._final = function () {
+		return Buffer.concat(this._cache);
+	};
+	var cipher = new Cipher();
+	var utf8 = 'abc123abcd';
+	var update = cipher.update(utf8, 'utf8').finalName('base64');
+	var string = Buffer.from(update, 'base64').toString();
+
+	t.equals(utf8, string);
+
+	t.end();
+});
+
+test('hash mode as stream', function (t) {
+	function Cipher() {
+		CipherBase.call(this, 'finalName');
+		this._cache = [];
+	}
+	inherits(Cipher, CipherBase);
+	Cipher.prototype._update = function (input) {
+		t.ok(Buffer.isBuffer(input));
+		this._cache.push(input);
+	};
+	Cipher.prototype._final = function () {
+		return Buffer.concat(this._cache);
+	};
+	var cipher = new Cipher();
+	cipher.on('error', function (e) {
+		t.notOk(e);
+	});
+	var utf8 = 'abc123abcd';
+	cipher.end(utf8, 'utf8');
+	var update = cipher.read().toString('base64');
+	var string = Buffer.from(update, 'base64').toString();
+
+	t.equals(utf8, string);
+
+	t.end();
+});
+
+test('encodings', function (t) {
+	function Cipher() {
+		CipherBase.call(this);
+	}
+	inherits(Cipher, CipherBase);
+
+	Cipher.prototype._update = function (input) {
+		return input;
+	};
+
+	Cipher.prototype._final = function () {
+		// noop
+	};
+
+	t.test('mix and match encoding', function (st) {
+		st.plan(2);
+
+		var cipher = new Cipher();
+		cipher.update('foo', 'utf8', 'utf8');
+
+		st['throws'](function () {
+			cipher.update('foo', 'utf8', 'base64');
+		});
+
+		cipher = new Cipher();
+		cipher.update('foo', 'utf8', 'base64');
+
+		st.doesNotThrow(function () {
+			cipher.update('foo', 'utf8');
+			cipher['final']('base64');
+		});
+	});
+
+	t.test('handle long uft8 plaintexts', function (st) {
+		st.plan(1);
+		var txt = 'ふっかつ　あきる　すぶり　はやい　つける　まゆげ　たんさん　みんぞく　ねほりはほり　せまい　たいまつばな　ひはん';
+
+		var cipher = new Cipher();
+		var decipher = new Cipher();
+		var enc = decipher.update(cipher.update(txt, 'utf8', 'base64'), 'base64', 'utf8');
+		enc += decipher.update(cipher['final']('base64'), 'base64', 'utf8');
+		enc += decipher['final']('utf8');
+
+		st.equals(txt, enc);
+	});
+});
+
+test('handle SafeBuffer instances', function (t) {
+	function Cipher() {
+		CipherBase.call(this, 'finalName');
+		this._cache = [];
+	}
+	inherits(Cipher, CipherBase);
+	Cipher.prototype._update = function (input) {
+		t.ok(Buffer.isBuffer(input));
+		this._cache.push(input);
+	};
+	Cipher.prototype._final = function () {
+		return Buffer.concat(this._cache);
+	};
+
+	var cipher = new Cipher();
+	var final = cipher.update(Buffer.from('a0c1', 'hex')).finalName('hex');
+	t.equals(final, 'a0c1');
+
+	t.end();
+});
+
+test('handle Uint8Array view', function (t) {
+	function Cipher() {
+		CipherBase.call(this, 'finalName');
+		this._cache = [];
+	}
+	inherits(Cipher, CipherBase);
+	Cipher.prototype._update = function (input) {
+		t.ok(Buffer.isBuffer(input));
+		this._cache.push(input);
+	};
+	Cipher.prototype._final = function () {
+		return Buffer.concat(this._cache);
+	};
+
+	var buf = new Uint8Array([0, 1, 2, 3, 4, 5]);
+	var uarr = new Uint8Array(buf.buffer, 2, 3);
+
+	var cipher = new Cipher();
+	var final = cipher.update(uarr).finalName('hex');
+	t.equals(final, '020304');
+
+	t.end();
+});
+
+test('handle empty Uint8Array instances', function (t) {
+	function Cipher() {
+		CipherBase.call(this, 'finalName');
+		this._cache = [];
+	}
+	inherits(Cipher, CipherBase);
+	Cipher.prototype._update = function (input) {
+		t.ok(Buffer.isBuffer(input));
+		this._cache.push(input);
+	};
+	Cipher.prototype._final = function () {
+		return Buffer.concat(this._cache);
+	};
+
+	var cipher = new Cipher();
+	var final = cipher.update(new Uint8Array(0)).finalName('hex');
+	t.equals(final, '');
+
+	t.end();
+});
+
+test('handle UInt16Array', function (t) {
+	function Cipher() {
+		CipherBase.call(this, 'finalName');
+		this._cache = [];
+	}
+	inherits(Cipher, CipherBase);
+	Cipher.prototype._update = function (input) {
+		t.ok(Buffer.isBuffer(input));
+		this._cache.push(input);
+	};
+	Cipher.prototype._final = function () {
+		return Buffer.concat(this._cache);
+	};
+
+	if (ArrayBuffer.isView && (Buffer.prototype instanceof Uint8Array || Buffer.TYPED_ARRAY_SUPPORT)) {
+		var cipher = new Cipher();
+		var final = cipher.update(new Uint16Array([1234, 512])).finalName('hex');
+		t.equals(final, 'd2040002');
+	} else {
+		t.skip('ArrayBuffer.isView and/or TypedArray not fully supported');
+	}
+
+	t.end();
+});