6 files changed, 194 insertions, 0 deletions
diff --git a/node_modules/create-ecdh/.travis.yml b/node_modules/create-ecdh/.travis.yml
new file mode 100644
index 00000000..4ceadcbe
--- /dev/null
+++ b/node_modules/create-ecdh/.travis.yml
@@ -0,0 +1,7 @@
+language: node_js
+sudo: false
+node_js:
+  - 6
+  - 8
+  - 9
+  - 10
diff --git a/node_modules/create-ecdh/LICENSE b/node_modules/create-ecdh/LICENSE
new file mode 100644
index 00000000..58b3e845
--- /dev/null
+++ b/node_modules/create-ecdh/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2017 createECDH contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/node_modules/create-ecdh/browser.js b/node_modules/create-ecdh/browser.js
new file mode 100644
index 00000000..3613b451
--- /dev/null
+++ b/node_modules/create-ecdh/browser.js
@@ -0,0 +1,124 @@
+var elliptic = require('elliptic')
+var BN = require('bn.js')
+
+module.exports = function createECDH (curve) {
+  return new ECDH(curve)
+}
+
+var aliases = {
+  secp256k1: {
+    name: 'secp256k1',
+    byteLength: 32
+  },
+  secp224r1: {
+    name: 'p224',
+    byteLength: 28
+  },
+  prime256v1: {
+    name: 'p256',
+    byteLength: 32
+  },
+  prime192v1: {
+    name: 'p192',
+    byteLength: 24
+  },
+  ed25519: {
+    name: 'ed25519',
+    byteLength: 32
+  },
+  secp384r1: {
+    name: 'p384',
+    byteLength: 48
+  },
+  secp521r1: {
+    name: 'p521',
+    byteLength: 66
+  }
+}
+
+aliases.p224 = aliases.secp224r1
+aliases.p256 = aliases.secp256r1 = aliases.prime256v1
+aliases.p192 = aliases.secp192r1 = aliases.prime192v1
+aliases.p384 = aliases.secp384r1
+aliases.p521 = aliases.secp521r1
+
+function ECDH (curve) {
+  this.curveType = aliases[curve]
+  if (!this.curveType) {
+    this.curveType = {
+      name: curve
+    }
+  }
+  this.curve = new elliptic.ec(this.curveType.name) // eslint-disable-line new-cap
+  this.keys = void 0
+}
+
+ECDH.prototype.generateKeys = function (enc, format) {
+  this.keys = this.curve.genKeyPair()
+  return this.getPublicKey(enc, format)
+}
+
+ECDH.prototype.computeSecret = function (other, inenc, enc) {
+  inenc = inenc || 'utf8'
+  if (!Buffer.isBuffer(other)) {
+    other = new Buffer(other, inenc)
+  }
+  var otherPub = this.curve.keyFromPublic(other).getPublic()
+  var out = otherPub.mul(this.keys.getPrivate()).getX()
+  return formatReturnValue(out, enc, this.curveType.byteLength)
+}
+
+ECDH.prototype.getPublicKey = function (enc, format) {
+  var key = this.keys.getPublic(format === 'compressed', true)
+  if (format === 'hybrid') {
+    if (key[key.length - 1] % 2) {
+      key[0] = 7
+    } else {
+      key[0] = 6
+    }
+  }
+  return formatReturnValue(key, enc)
+}
+
+ECDH.prototype.getPrivateKey = function (enc) {
+  return formatReturnValue(this.keys.getPrivate(), enc)
+}
+
+ECDH.prototype.setPublicKey = function (pub, enc) {
+  enc = enc || 'utf8'
+  if (!Buffer.isBuffer(pub)) {
+    pub = new Buffer(pub, enc)
+  }
+  this.keys._importPublic(pub)
+  return this
+}
+
+ECDH.prototype.setPrivateKey = function (priv, enc) {
+  enc = enc || 'utf8'
+  if (!Buffer.isBuffer(priv)) {
+    priv = new Buffer(priv, enc)
+  }
+
+  var _priv = new BN(priv)
+  _priv = _priv.toString(16)
+  this.keys = this.curve.genKeyPair()
+  this.keys._importPrivate(_priv)
+  return this
+}
+
+function formatReturnValue (bn, enc, len) {
+  if (!Array.isArray(bn)) {
+    bn = bn.toArray()
+  }
+  var buf = new Buffer(bn)
+  if (len && buf.length < len) {
+    var zeros = new Buffer(len - buf.length)
+    zeros.fill(0)
+    buf = Buffer.concat([zeros, buf])
+  }
+  if (!enc) {
+    return buf
+  } else {
+    return buf.toString(enc)
+  }
+}
diff --git a/node_modules/create-ecdh/index.js b/node_modules/create-ecdh/index.js
new file mode 100644
index 00000000..841d085e
--- /dev/null
+++ b/node_modules/create-ecdh/index.js
@@ -0,0 +1,3 @@
+var createECDH = require('crypto').createECDH
+
+module.exports = createECDH || require('./browser')
diff --git a/node_modules/create-ecdh/package.json b/node_modules/create-ecdh/package.json
new file mode 100644
index 00000000..b804cac4
--- /dev/null
+++ b/node_modules/create-ecdh/package.json
@@ -0,0 +1,35 @@
+{
+  "name": "create-ecdh",
+  "version": "4.0.3",
+  "description": "createECDH but browserifiable",
+  "main": "index.js",
+  "browser": "browser.js",
+  "scripts": {
+    "test": "standard && node test.js | tspec"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/crypto-browserify/createECDH.git"
+  },
+  "keywords": [
+    "diffie",
+    "hellman",
+    "diffiehellman",
+    "ECDH"
+  ],
+  "author": "Calvin Metcalf",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/crypto-browserify/createECDH/issues"
+  },
+  "homepage": "https://github.com/crypto-browserify/createECDH",
+  "dependencies": {
+    "bn.js": "^4.1.0",
+    "elliptic": "^6.0.0"
+  },
+  "devDependencies": {
+    "tap-spec": "^1.0.1",
+    "tape": "^3.0.1",
+    "standard": "^5.4.1"
+  }
+}
diff --git a/node_modules/create-ecdh/readme.md b/node_modules/create-ecdh/readme.md
new file mode 100644
index 00000000..7e5ce47b
--- /dev/null
+++ b/node_modules/create-ecdh/readme.md
@@ -0,0 +1,4 @@
+createECDH [![Build Status](https://travis-ci.org/crypto-browserify/createECDH.svg)](https://travis-ci.org/crypto-browserify/createECDH)
+====
+
+In io.js or node >= 0.11 this module is just a shortcut to crypto.createECDH.  In node <= 0.11 or the browser this is a pure JavaScript implimentation, more specifically a wrapper around [elliptic](https://github.com/indutny/elliptic), to give it the same API as node. `secp256k1`, `secp224r1` (aka p224), `prime256v1` (aka p256, secp256r1), `prime192v1` (aka p192, secp192r1), `secp384r1` (aka p384), `secp521r1` (aka p521)  curves all work in both this library and node (though only the highlighted name will work in node).