[Pkg-javascript-commits] [node-browserify-des] 01/08: first

[Bastien Roucariès]

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rouca pushed a commit to branch master
in repository node-browserify-des.

commit ec4fc6ad180ab43efe687bdb6e84100d048c9c53
Author: Calvin Metcalf <calvin.metcalf at gmail.com>
Date:   Sun Sep 27 13:30:17 2015 -0400

    first
---
 index.js     | 43 +++++++++++++++++++++++++++++++++++++++++++
 modes.js     | 24 ++++++++++++++++++++++++
 package.json | 29 +++++++++++++++++++++++++++++
 readme.md    |  4 ++++
 test.js      | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 148 insertions(+)

diff --git a/index.js b/index.js
new file mode 100644
index 0000000..2889bb7
--- /dev/null
+++ b/index.js
@@ -0,0 +1,43 @@
+var CipherBase = require('cipher-base')
+var des = require('des.js')
+var inherits = require('inherits')
+
+var modes = {
+  'des-ede3-cbc': des.CBC.instantiate(des.EDE),
+  'des-ede3': des.EDE,
+  'des-ede-cbc': des.CBC.instantiate(des.EDE),
+  'des-ede': des.EDE,
+  'des-cbc': des.CBC.instantiate(des.DES),
+  'des-ecb': des.DES
+}
+modes.des = modes['des-cbc']
+modes.des3 = modes['des-ede3-cbc']
+module.exports = DES
+inherits(DES, CipherBase)
+function DES (opts) {
+  CipherBase.call(this)
+  var modeName = opts.mode.toLowerCase()
+  var mode = modes[modeName]
+  var type
+  if (opts.decrypt) {
+    type = 'decrypt'
+  } else {
+    type = 'encrypt'
+  }
+  var key = opts.key
+  if (modeName === 'des-ede' || modeName === 'des-ede-cbc') {
+    key = Buffer.concat([key, key.slice(0, 8)])
+  }
+  var iv = opts.iv
+  this._des = mode.create({
+    key: key,
+    iv: iv,
+    type: type
+  })
+}
+DES.prototype._update = function (data) {
+  return new Buffer(this._des.update(data))
+}
+DES.prototype._final = function () {
+  return new Buffer(this._des.final())
+}
diff --git a/modes.js b/modes.js
new file mode 100644
index 0000000..72f308d
--- /dev/null
+++ b/modes.js
@@ -0,0 +1,24 @@
+exports['des-ecb'] = {
+  key: 8,
+  iv: 0
+}
+exports['des-cbc'] = exports.des = {
+  key: 8,
+  iv: 8
+}
+exports['des-ede3-cbc'] = exports.des3 = {
+  key: 24,
+  iv: 8
+}
+exports['des-ede3'] = {
+  key: 24,
+  iv: 0
+}
+exports['des-ede-cbc'] = {
+  key: 16,
+  iv: 8
+}
+exports['des-ede'] = {
+  key: 16,
+  iv: 0
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..fdc9a8f
--- /dev/null
+++ b/package.json
@@ -0,0 +1,29 @@
+{
+  "name": "browserify-des",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "standard && node test.js | tspec"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/crypto-browserify/browserify-des.git"
+  },
+  "author": "Calvin Metcalf <calvin.metcalf at gmail.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/crypto-browserify/browserify-des/issues"
+  },
+  "homepage": "https://github.com/crypto-browserify/browserify-des#readme",
+  "dependencies": {
+    "cipher-base": "^1.0.1",
+    "des.js": "^1.0.0",
+    "inherits": "^2.0.1"
+  },
+  "devDependencies": {
+    "standard": "^5.3.1",
+    "tap-spec": "^4.1.0",
+    "tape": "^4.2.0"
+  }
+}
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..c29c1b2
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,4 @@
+browserify-des
+===
+
+DES for browserify
diff --git a/test.js b/test.js
new file mode 100644
index 0000000..6324f43
--- /dev/null
+++ b/test.js
@@ -0,0 +1,48 @@
+var test = require('tape')
+var DES = require('./')
+var modes = require('./modes')
+var crypto = require('crypto')
+
+Object.keys(modes).forEach(function (mode) {
+  test(mode, function (t) {
+    var i = 0
+    while (++i < 10) {
+      runOnce(i)
+    }
+    function runOnce (i) {
+      t.test('run: ' + i, function (t) {
+        t.plan(2)
+        var key = crypto.randomBytes(modes[mode].key)
+        var iv = crypto.randomBytes(modes[mode].iv)
+        var text = crypto.randomBytes(200)
+        var ourEncrypt
+        try {
+          ourEncrypt = new DES({
+            mode: mode,
+            key: key,
+            iv: iv
+          })
+        } catch (e) {
+          t.notOk(e, e.stack)
+        }
+        var nodeEncrypt
+        try {
+          nodeEncrypt = crypto.createCipheriv(mode, key, iv)
+        } catch (e) {
+          t.notOk(e, e.stack)
+        }
+        var ourCipherText = Buffer.concat([ourEncrypt.update(text), ourEncrypt.final()])
+        var nodeCipherText = Buffer.concat([nodeEncrypt.update(text), nodeEncrypt.final()])
+        t.equals(nodeCipherText.toString('hex'), ourCipherText.toString('hex'))
+        var ourDecrypt = new DES({
+          mode: mode,
+          key: key,
+          iv: iv,
+          decrypt: true
+        })
+        var plainText = Buffer.concat([ourDecrypt.update(ourCipherText), ourDecrypt.final()])
+        t.equals(text.toString('hex'), plainText.toString('hex'))
+      })
+    }
+  })
+})

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