1 files changed, 119 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/pubkey/xmss/xmss_parameters.h b/comm/third_party/botan/src/lib/pubkey/xmss/xmss_parameters.h
new file mode 100644
index 0000000000..2f186ac53b
--- /dev/null
+++ b/comm/third_party/botan/src/lib/pubkey/xmss/xmss_parameters.h
@@ -0,0 +1,119 @@
+/*
+ * XMSS Parameters
+ * (C) 2016,2018 Matthias Gierlings
+ *
+ * Botan is released under the Simplified BSD License (see license.txt)
+ **/
+
+#ifndef BOTAN_XMSS_PARAMETERS_H_
+#define BOTAN_XMSS_PARAMETERS_H_
+
+#include <botan/xmss_wots.h>
+#include <string>
+
+namespace Botan {
+
+/**
+ * Descibes a signature method for XMSS, as defined in:
+ * [1] XMSS: Extended Hash-Based Signatures,
+ *     Request for Comments: 8391
+ *     Release: May 2018.
+ *     https://datatracker.ietf.org/doc/rfc8391/
+ **/
+class BOTAN_PUBLIC_API(2,0) XMSS_Parameters
+   {
+   public:
+      enum xmss_algorithm_t
+         {
+         XMSS_SHA2_10_256 = 0x00000001,
+         XMSS_SHA2_16_256 = 0x00000002,
+         XMSS_SHA2_20_256 = 0x00000003,
+         XMSS_SHA2_10_512 = 0x00000004,
+         XMSS_SHA2_16_512 = 0x00000005,
+         XMSS_SHA2_20_512 = 0x00000006,
+         XMSS_SHAKE_10_256 = 0x00000007,
+         XMSS_SHAKE_16_256 = 0x00000008,
+         XMSS_SHAKE_20_256 = 0x00000009,
+         XMSS_SHAKE_10_512 = 0x0000000a,
+         XMSS_SHAKE_16_512 = 0x0000000b,
+         XMSS_SHAKE_20_512 = 0x0000000c
+         };
+
+      static xmss_algorithm_t xmss_id_from_string(const std::string& algo_name);
+
+      XMSS_Parameters(const std::string& algo_name);
+      XMSS_Parameters(xmss_algorithm_t oid);
+
+      /**
+       * @return XMSS registry name for the chosen parameter set.
+       **/
+      const std::string& name() const
+         {
+         return m_name;
+         }
+
+      const std::string& hash_function_name() const
+         {
+         return m_hash_name;
+         }
+
+      /**
+       * Retrieves the uniform length of a message, and the size of
+       * each node. This correlates to XMSS parameter "n" defined
+       * in [1].
+       *
+       * @return element length in bytes.
+       **/
+      size_t element_size() const { return m_element_size; }
+
+      /**
+       * @returns The height (number of levels - 1) of the tree
+       **/
+      size_t tree_height() const { return m_tree_height; }
+
+      /**
+       * The Winternitz parameter.
+       *
+       * @return numeric base used for internal representation of
+       *         data.
+       **/
+      size_t wots_parameter() const { return m_w; }
+
+      size_t len() const { return m_len; }
+
+      xmss_algorithm_t oid() const { return m_oid; }
+
+      XMSS_WOTS_Parameters::ots_algorithm_t ots_oid() const
+         {
+         return m_wots_oid;
+         }
+
+      /**
+       * Returns the estimated pre-quantum security level of
+       * the chosen algorithm.
+       **/
+      size_t estimated_strength() const
+         {
+         return m_strength;
+         }
+
+      bool operator==(const XMSS_Parameters& p) const
+         {
+         return m_oid == p.m_oid;
+         }
+
+   private:
+      xmss_algorithm_t m_oid;
+      XMSS_WOTS_Parameters::ots_algorithm_t m_wots_oid;
+      std::string m_name;
+      std::string m_hash_name;
+      size_t m_element_size;
+      size_t m_tree_height;
+      size_t m_w;
+      size_t m_len;
+      size_t m_strength;
+   };
+
+}
+
+#endif