1 files changed, 74 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/filters/secqueue.h b/comm/third_party/botan/src/lib/filters/secqueue.h
new file mode 100644
index 0000000000..42d2f09e2d
--- /dev/null
+++ b/comm/third_party/botan/src/lib/filters/secqueue.h
@@ -0,0 +1,74 @@
+/*
+* SecureQueue
+* (C) 1999-2007 Jack Lloyd
+*     2012 Markus Wanner
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_SECURE_QUEUE_H_
+#define BOTAN_SECURE_QUEUE_H_
+
+#include <botan/data_src.h>
+#include <botan/filter.h>
+
+BOTAN_FUTURE_INTERNAL_HEADER(secqueue.h)
+
+namespace Botan {
+
+/**
+* A queue that knows how to zeroize itself
+*/
+class BOTAN_PUBLIC_API(2,0) SecureQueue final : public Fanout_Filter, public DataSource
+   {
+   public:
+      std::string name() const override { return "Queue"; }
+
+      void write(const uint8_t[], size_t) override;
+
+      size_t read(uint8_t[], size_t) override;
+      size_t peek(uint8_t[], size_t, size_t = 0) const override;
+      size_t get_bytes_read() const override;
+
+      bool end_of_data() const override;
+
+      bool empty() const;
+
+      bool check_available(size_t n) override { return n <= size(); }
+
+      /**
+      * @return number of bytes available in the queue
+      */
+      size_t size() const;
+
+      bool attachable() override { return false; }
+
+      /**
+      * SecureQueue assignment
+      * @param other the queue to copy
+      */
+      SecureQueue& operator=(const SecureQueue& other);
+
+      /**
+      * SecureQueue default constructor (creates empty queue)
+      */
+      SecureQueue();
+
+      /**
+      * SecureQueue copy constructor
+      * @param other the queue to copy
+      */
+      SecureQueue(const SecureQueue& other);
+
+      ~SecureQueue() { destroy(); }
+
+   private:
+      void destroy();
+      size_t m_bytes_read;
+      class SecureQueueNode* m_head;
+      class SecureQueueNode* m_tail;
+   };
+
+}
+
+#endif