node_modules

1 files changed, 31 insertions, 0 deletions

diff --git a/node_modules/browserify-aes/modes/cfb.js b/node_modules/browserify-aes/modes/cfb.js
new file mode 100644
index 000000000..0bfe4fab8
--- /dev/null
+++ b/node_modules/browserify-aes/modes/cfb.js
@@ -0,0 +1,31 @@
+var xor = require('buffer-xor')
+
+exports.encrypt = function (self, data, decrypt) {
+  var out = new Buffer('')
+  var len
+
+  while (data.length) {
+    if (self._cache.length === 0) {
+      self._cache = self._cipher.encryptBlock(self._prev)
+      self._prev = new Buffer('')
+    }
+
+    if (self._cache.length <= data.length) {
+      len = self._cache.length
+      out = Buffer.concat([out, encryptStart(self, data.slice(0, len), decrypt)])
+      data = data.slice(len)
+    } else {
+      out = Buffer.concat([out, encryptStart(self, data, decrypt)])
+      break
+    }
+  }
+
+  return out
+}
+function encryptStart (self, data, decrypt) {
+  var len = data.length
+  var out = xor(data, self._cache)
+  self._cache = self._cache.slice(len)
+  self._prev = Buffer.concat([self._prev, decrypt ? data : out])
+  return out
+}