1 files changed, 105 insertions, 0 deletions
diff --git a/node_modules/pbkdf2/lib/sync-browser.js b/node_modules/pbkdf2/lib/sync-browser.js
new file mode 100644
index 0000000..20a64b4
--- /dev/null
+++ b/node_modules/pbkdf2/lib/sync-browser.js
@@ -0,0 +1,105 @@
+var md5 = require('create-hash/md5')
+var RIPEMD160 = require('ripemd160')
+var sha = require('sha.js')
+var Buffer = require('safe-buffer').Buffer
+
+var checkParameters = require('./precondition')
+var defaultEncoding = require('./default-encoding')
+var toBuffer = require('./to-buffer')
+
+var ZEROS = Buffer.alloc(128)
+var sizes = {
+  md5: 16,
+  sha1: 20,
+  sha224: 28,
+  sha256: 32,
+  sha384: 48,
+  sha512: 64,
+  rmd160: 20,
+  ripemd160: 20
+}
+
+function Hmac (alg, key, saltLen) {
+  var hash = getDigest(alg)
+  var blocksize = (alg === 'sha512' || alg === 'sha384') ? 128 : 64
+
+  if (key.length > blocksize) {
+    key = hash(key)
+  } else if (key.length < blocksize) {
+    key = Buffer.concat([key, ZEROS], blocksize)
+  }
+
+  var ipad = Buffer.allocUnsafe(blocksize + sizes[alg])
+  var opad = Buffer.allocUnsafe(blocksize + sizes[alg])
+  for (var i = 0; i < blocksize; i++) {
+    ipad[i] = key[i] ^ 0x36
+    opad[i] = key[i] ^ 0x5C
+  }
+
+  var ipad1 = Buffer.allocUnsafe(blocksize + saltLen + 4)
+  ipad.copy(ipad1, 0, 0, blocksize)
+  this.ipad1 = ipad1
+  this.ipad2 = ipad
+  this.opad = opad
+  this.alg = alg
+  this.blocksize = blocksize
+  this.hash = hash
+  this.size = sizes[alg]
+}
+
+Hmac.prototype.run = function (data, ipad) {
+  data.copy(ipad, this.blocksize)
+  var h = this.hash(ipad)
+  h.copy(this.opad, this.blocksize)
+  return this.hash(this.opad)
+}
+
+function getDigest (alg) {
+  function shaFunc (data) {
+    return sha(alg).update(data).digest()
+  }
+  function rmd160Func (data) {
+    return new RIPEMD160().update(data).digest()
+  }
+
+  if (alg === 'rmd160' || alg === 'ripemd160') return rmd160Func
+  if (alg === 'md5') return md5
+  return shaFunc
+}
+
+function pbkdf2 (password, salt, iterations, keylen, digest) {
+  checkParameters(iterations, keylen)
+  password = toBuffer(password, defaultEncoding, 'Password')
+  salt = toBuffer(salt, defaultEncoding, 'Salt')
+
+  digest = digest || 'sha1'
+
+  var hmac = new Hmac(digest, password, salt.length)
+
+  var DK = Buffer.allocUnsafe(keylen)
+  var block1 = Buffer.allocUnsafe(salt.length + 4)
+  salt.copy(block1, 0, 0, salt.length)
+
+  var destPos = 0
+  var hLen = sizes[digest]
+  var l = Math.ceil(keylen / hLen)
+
+  for (var i = 1; i <= l; i++) {
+    block1.writeUInt32BE(i, salt.length)
+
+    var T = hmac.run(block1, hmac.ipad1)
+    var U = T
+
+    for (var j = 1; j < iterations; j++) {
+      U = hmac.run(U, hmac.ipad2)
+      for (var k = 0; k < hLen; k++) T[k] ^= U[k]
+    }
+
+    T.copy(DK, destPos)
+    destPos += hLen
+  }
+
+  return DK
+}
+
+module.exports = pbkdf2