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1 files changed, 51 insertions, 0 deletions

diff --git a/node_modules/pbkdf2/lib/sync.js b/node_modules/pbkdf2/lib/sync.js
new file mode 100644
index 00000000..f691e31a
--- /dev/null
+++ b/node_modules/pbkdf2/lib/sync.js
@@ -0,0 +1,51 @@
+var sizes = {
+  md5: 16,
+  sha1: 20,
+  sha224: 28,
+  sha256: 32,
+  sha384: 48,
+  sha512: 64,
+  rmd160: 20,
+  ripemd160: 20
+}
+
+var createHmac = require('create-hmac')
+var checkParameters = require('../lib/precondition')
+var defaultEncoding = require('../lib/default-encoding')
+var Buffer = require('safe-buffer').Buffer
+
+function pbkdf2 (password, salt, iterations, keylen, digest) {
+  checkParameters(password, salt, iterations, keylen)
+
+  if (!Buffer.isBuffer(password)) password = Buffer.from(password, defaultEncoding)
+  if (!Buffer.isBuffer(salt)) salt = Buffer.from(salt, defaultEncoding)
+
+  digest = digest || 'sha1'
+
+  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 = createHmac(digest, password).update(block1).digest()
+    var U = T
+
+    for (var j = 1; j < iterations; j++) {
+      U = createHmac(digest, password).update(U).digest()
+      for (var k = 0; k < hLen; k++) T[k] ^= U[k]
+    }
+
+    T.copy(DK, destPos)
+    destPos += hLen
+  }
+
+  return DK
+}
+
+module.exports = pbkdf2