1 files changed, 66 insertions, 0 deletions
diff --git a/src/libs/3rdparty/botan/src/lib/stream/ctr/ctr.h b/src/libs/3rdparty/botan/src/lib/stream/ctr/ctr.h
new file mode 100644
index 0000000000..c4c5981616
--- /dev/null
+++ b/src/libs/3rdparty/botan/src/lib/stream/ctr/ctr.h
@@ -0,0 +1,66 @@
+/*
+* CTR-BE Mode
+* (C) 1999-2007 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_CTR_BE_H_
+#define BOTAN_CTR_BE_H_
+
+#include <botan/block_cipher.h>
+#include <botan/stream_cipher.h>
+
+namespace Botan {
+
+/**
+* CTR-BE (Counter mode, big-endian)
+*/
+class BOTAN_PUBLIC_API(2,0) CTR_BE final : public StreamCipher
+   {
+   public:
+      void cipher(const uint8_t in[], uint8_t out[], size_t length) override;
+
+      void set_iv(const uint8_t iv[], size_t iv_len) override;
+
+      bool valid_iv_length(size_t iv_len) const override
+         { return (iv_len <= m_cipher->block_size()); }
+
+      Key_Length_Specification key_spec() const override
+         {
+         return m_cipher->key_spec();
+         }
+
+      std::string name() const override;
+
+      CTR_BE* clone() const override
+         { return new CTR_BE(m_cipher->clone(), m_ctr_size); }
+
+      void clear() override;
+
+      /**
+      * @param cipher the block cipher to use
+      */
+      explicit CTR_BE(BlockCipher* cipher);
+
+      CTR_BE(BlockCipher* cipher, size_t ctr_size);
+
+      void seek(uint64_t offset) override;
+   private:
+      void key_schedule(const uint8_t key[], size_t key_len) override;
+      void add_counter(const uint64_t counter);
+
+      std::unique_ptr<BlockCipher> m_cipher;
+
+      const size_t m_block_size;
+      const size_t m_ctr_size;
+      const size_t m_ctr_blocks;
+
+      secure_vector<uint8_t> m_counter, m_pad;
+      std::vector<uint8_t> m_iv;
+      size_t m_pad_pos;
+   };
+
+}
+
+#endif