1 files changed, 127 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/pubkey/xmss/xmss_signature.h b/comm/third_party/botan/src/lib/pubkey/xmss/xmss_signature.h
new file mode 100644
index 0000000000..d791dbedb8
--- /dev/null
+++ b/comm/third_party/botan/src/lib/pubkey/xmss/xmss_signature.h
@@ -0,0 +1,127 @@
+/*
+ * XMSS Signature
+ * (C) 2016 Matthias Gierlings
+ *
+ * Botan is released under the Simplified BSD License (see license.txt)
+ **/
+
+#ifndef BOTAN_XMSS_SIGNATURE_H_
+#define BOTAN_XMSS_SIGNATURE_H_
+
+#include <cstddef>
+#include <botan/exceptn.h>
+#include <botan/types.h>
+#include <botan/secmem.h>
+#include <botan/xmss_parameters.h>
+#include <botan/xmss_wots.h>
+
+namespace Botan {
+
+class XMSS_Signature final
+   {
+   public:
+      /**
+       * Creates a signature from an XMSS signature method and a uint8_t sequence
+       * representing a raw signature.
+       *
+       * @param oid XMSS signature method
+       * @param raw_sig An XMSS signature serialized using
+       *                XMSS_Signature::bytes().
+       **/
+      XMSS_Signature(XMSS_Parameters::xmss_algorithm_t oid,
+                     const secure_vector<uint8_t>& raw_sig);
+
+      /**
+       * Creates an XMSS Signature from a leaf index used for signature
+       * generation, a random value and a tree signature.
+       *
+       * @param leaf_idx Leaf index used to generate the signature.
+       * @param randomness A random value.
+       * @param tree_sig A tree signature.
+       **/
+      XMSS_Signature(size_t leaf_idx,
+                     const secure_vector<uint8_t>& randomness,
+                     const XMSS_WOTS_PublicKey::TreeSignature& tree_sig)
+         : m_leaf_idx(leaf_idx), m_randomness(randomness),
+           m_tree_sig(tree_sig) {}
+
+      /**
+       * Creates an XMSS Signature from a leaf index used for signature
+       * generation, a random value and a tree signature.
+       *
+       * @param leaf_idx Leaf index used to generate the signature.
+       * @param randomness A random value.
+       * @param tree_sig A tree signature.
+       **/
+      XMSS_Signature(size_t leaf_idx,
+                     secure_vector<uint8_t>&& randomness,
+                     XMSS_WOTS_PublicKey::TreeSignature&& tree_sig)
+         : m_leaf_idx(leaf_idx), m_randomness(std::move(randomness)),
+           m_tree_sig(std::move(tree_sig)) {}
+
+      size_t unused_leaf_index() const { return m_leaf_idx; }
+      void set_unused_leaf_idx(size_t idx) { m_leaf_idx = idx; }
+
+      const secure_vector<uint8_t> randomness() const
+         {
+         return m_randomness;
+         }
+
+      secure_vector<uint8_t>& randomness()
+         {
+         return m_randomness;
+         }
+
+      void set_randomness(const secure_vector<uint8_t>& randomness)
+         {
+         m_randomness = randomness;
+         }
+
+      void set_randomness(secure_vector<uint8_t>&& randomness)
+         {
+         m_randomness = std::move(randomness);
+         }
+
+      const XMSS_WOTS_PublicKey::TreeSignature& tree() const
+         {
+         return m_tree_sig;
+         }
+
+      XMSS_WOTS_PublicKey::TreeSignature& tree()
+         {
+         return m_tree_sig;
+         }
+
+      void set_tree(const XMSS_WOTS_PublicKey::TreeSignature& tree_sig)
+         {
+         m_tree_sig = tree_sig;
+         }
+
+      void set_tree(XMSS_WOTS_PublicKey::TreeSignature&& tree_sig)
+         {
+         m_tree_sig = std::move(tree_sig);
+         }
+
+      /**
+       * Generates a serialized representation of XMSS Signature by
+       * concatenating the following elements in order:
+       * 4-byte leaf index, n-bytes randomness, ots_signature,
+       * authentication path.
+       *
+       * n is the element_size(), len equal to len(), h the tree height
+       * defined by the chosen XMSS signature method.
+       *
+       * @return serialized signature, a sequence of
+       *         4+(len + h + 1)n bytes.
+       **/
+      secure_vector<uint8_t> bytes() const;
+
+   private:
+      size_t m_leaf_idx;
+      secure_vector<uint8_t> m_randomness;
+      XMSS_WOTS_PublicKey::TreeSignature m_tree_sig;
+   };
+
+}
+
+#endif