1 files changed, 82 insertions, 0 deletions
diff --git a/src/libs/3rdparty/botan/src/lib/modes/stream_mode.h b/src/libs/3rdparty/botan/src/lib/modes/stream_mode.h
new file mode 100644
index 0000000000..3bce01731a
--- /dev/null
+++ b/src/libs/3rdparty/botan/src/lib/modes/stream_mode.h
@@ -0,0 +1,82 @@
+/*
+* (C) 2015 Jack Lloyd
+* (C) 2016 Daniel Neus, Rohde & Schwarz Cybersecurity
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_STREAM_MODE_H_
+#define BOTAN_STREAM_MODE_H_
+
+#include <botan/cipher_mode.h>
+
+#if defined(BOTAN_HAS_STREAM_CIPHER)
+   #include <botan/stream_cipher.h>
+#endif
+
+namespace Botan {
+
+#if defined(BOTAN_HAS_STREAM_CIPHER)
+
+class BOTAN_PUBLIC_API(2,0) Stream_Cipher_Mode final : public Cipher_Mode
+   {
+   public:
+      /**
+      * @param cipher underyling stream cipher
+      */
+      explicit Stream_Cipher_Mode(StreamCipher* cipher) : m_cipher(cipher) {}
+
+      size_t process(uint8_t buf[], size_t sz) override
+         {
+         m_cipher->cipher1(buf, sz);
+         return sz;
+         }
+
+      void finish(secure_vector<uint8_t>& buf, size_t offset) override
+         { return update(buf, offset); }
+
+      size_t output_length(size_t input_length) const override { return input_length; }
+
+      size_t update_granularity() const override { return 1; }
+
+      size_t minimum_final_size() const override { return 0; }
+
+      size_t default_nonce_length() const override { return 0; }
+
+      bool valid_nonce_length(size_t nonce_len) const override
+         { return m_cipher->valid_iv_length(nonce_len); }
+
+      Key_Length_Specification key_spec() const override { return m_cipher->key_spec(); }
+
+      std::string name() const override { return m_cipher->name(); }
+
+      void clear() override
+         {
+         m_cipher->clear();
+         reset();
+         }
+
+      void reset() override { /* no msg state */ }
+
+   private:
+      void start_msg(const uint8_t nonce[], size_t nonce_len) override
+         {
+         if(nonce_len > 0)
+            {
+            m_cipher->set_iv(nonce, nonce_len);
+            }
+         }
+
+      void key_schedule(const uint8_t key[], size_t length) override
+         {
+         m_cipher->set_key(key, length);
+         }
+
+      std::unique_ptr<StreamCipher> m_cipher;
+   };
+
+#endif
+
+}
+
+#endif