1 files changed, 54 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/stream/salsa20/salsa20.h b/comm/third_party/botan/src/lib/stream/salsa20/salsa20.h
new file mode 100644
index 0000000000..6ad0da7709
--- /dev/null
+++ b/comm/third_party/botan/src/lib/stream/salsa20/salsa20.h
@@ -0,0 +1,54 @@
+/*
+* Salsa20 / XSalsa20
+* (C) 1999-2010 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_SALSA20_H_
+#define BOTAN_SALSA20_H_
+
+#include <botan/stream_cipher.h>
+
+BOTAN_FUTURE_INTERNAL_HEADER(salsa20.h)
+
+namespace Botan {
+
+/**
+* DJB's Salsa20 (and XSalsa20)
+*/
+class BOTAN_PUBLIC_API(2,0) Salsa20 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;
+
+      size_t default_iv_length() const override;
+
+      Key_Length_Specification key_spec() const override;
+
+      void clear() override;
+      std::string name() const override;
+      StreamCipher* clone() const override;
+
+      static void salsa_core(uint8_t output[64], const uint32_t input[16], size_t rounds);
+      static void hsalsa20(uint32_t output[8], const uint32_t input[16]);
+
+      void seek(uint64_t offset) override;
+   private:
+      void key_schedule(const uint8_t key[], size_t key_len) override;
+
+      void initialize_state();
+
+      secure_vector<uint32_t> m_key;
+      secure_vector<uint32_t> m_state;
+      secure_vector<uint8_t> m_buffer;
+      size_t m_position = 0;
+   };
+
+}
+
+#endif