1 files changed, 57 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/block/cascade/cascade.h b/comm/third_party/botan/src/lib/block/cascade/cascade.h
new file mode 100644
index 0000000000..26f5133811
--- /dev/null
+++ b/comm/third_party/botan/src/lib/block/cascade/cascade.h
@@ -0,0 +1,57 @@
+/*
+* Block Cipher Cascade
+* (C) 2010 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_CASCADE_H_
+#define BOTAN_CASCADE_H_
+
+#include <botan/block_cipher.h>
+
+BOTAN_FUTURE_INTERNAL_HEADER(cascade.h)
+
+namespace Botan {
+
+/**
+* Block Cipher Cascade
+*/
+class BOTAN_PUBLIC_API(2,0) Cascade_Cipher final : public BlockCipher
+   {
+   public:
+      void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
+      void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
+
+      size_t block_size() const override { return m_block; }
+
+      Key_Length_Specification key_spec() const override
+         {
+         return Key_Length_Specification(m_cipher1->maximum_keylength() +
+                                         m_cipher2->maximum_keylength());
+         }
+
+      void clear() override;
+      std::string name() const override;
+      BlockCipher* clone() const override;
+
+      /**
+      * Create a cascade of two block ciphers
+      * @param cipher1 the first cipher
+      * @param cipher2 the second cipher
+      */
+      Cascade_Cipher(BlockCipher* cipher1, BlockCipher* cipher2);
+
+      Cascade_Cipher(const Cascade_Cipher&) = delete;
+      Cascade_Cipher& operator=(const Cascade_Cipher&) = delete;
+   private:
+      void key_schedule(const uint8_t[], size_t) override;
+
+      size_t m_block;
+      std::unique_ptr<BlockCipher> m_cipher1, m_cipher2;
+   };
+
+
+}
+
+#endif