Challenge 7

1 files changed, 36 insertions, 0 deletions

diff --git a/src/solvers/Challenge7.scala b/src/solvers/Challenge7.scala
new file mode 100644
index 0000000..ee1745a
--- /dev/null
+++ b/src/solvers/Challenge7.scala
@@ -0,0 +1,36 @@
+package ixee.cryptopals.solvers
+
+import scala.io.Source
+import ixee.cryptopals.utils.ByteUtils._
+import ixee.cryptopals.utils.ConversionUtils._
+import ixee.cryptopals.utils.FunctionUtils._
+import ixee.cryptopals.utils._
+import io.github.marklister.base64.Base64._
+import javax.crypto.Cipher
+import javax.crypto.spec.SecretKeySpec
+
+object Challenge7 {
+  val path = "./data/7.txt"
+
+  lazy val ciphertext =
+    Source
+      .fromFile(path)
+      .getLines()
+      .toSeq
+      .flatten
+      .mkString
+      .toByteArray
+
+  val key = new SecretKeySpec(
+    "YELLOW SUBMARINE".asBytes.toArray,
+    "AES"
+  )
+
+  def run = {
+    val cipher = Cipher.getInstance(
+      "AES/ECB/PKCS5Padding"
+    )
+    cipher.init(Cipher.DECRYPT_MODE, key)
+    new String(cipher.doFinal(ciphertext))
+  }
+}