1 files changed, 8 insertions, 0 deletions
diff --git a/src/utils/CryptoUtils.scala b/src/utils/CryptoUtils.scala
index 5418895..2b4d38e 100644
--- a/src/utils/CryptoUtils.scala
+++ b/src/utils/CryptoUtils.scala
@@ -1,5 +1,9 @@
 package ixee.cryptopals.utils
 
+import ixee.cryptopals.utils.crypto.CBCCipher
+import javax.crypto.Cipher
+import javax.crypto.spec.SecretKeySpec
+
 object CryptoUtils {
 
   def pkcs7pad(s: String, blockSize: Int) = {
@@ -7,4 +11,8 @@ object CryptoUtils {
     s + s"${padLength.toChar}" * padLength
   }
 
+  def cbcDecryptInstance(ecbCipher: Cipher, key: SecretKeySpec): CBCCipher = {
+    ecbCipher.init(Cipher.DECRYPT_MODE, key)
+    new CBCCipher(ecbCipher)
+  }
 }