Add Curve25519 based on curve25519-donna by Adam Langley.

This uses only the c64 version from curve25519-donna; on systems that
don't have a native uint128_t type, a donna128 type stands in for just
enough 128-bit operations to satisfy donna.cpp

1 files changed, 14 insertions, 0 deletions

diff --git a/src/lib/pubkey/pk_algs.cpp b/src/lib/pubkey/pk_algs.cpp
index 9673199e0..e1784dd9f 100644
--- a/src/lib/pubkey/pk_algs.cpp
+++ b/src/lib/pubkey/pk_algs.cpp
@@ -44,6 +44,10 @@
   #include <botan/ecdh.h>
 #endif
 
+#if defined(BOTAN_HAS_CURVE_25519)
+  #include <botan/curve25519.h>
+#endif
+
 namespace Botan {
 
 Public_Key* make_public_key(const AlgorithmIdentifier& alg_id,
@@ -98,6 +102,11 @@ Public_Key* make_public_key(const AlgorithmIdentifier& alg_id,
       return new ECDH_PublicKey(alg_id, key_bits);
 #endif
 
+#if defined(BOTAN_HAS_CURVE_25519)
+   if(alg_name == "Curve25519")
+      return new Curve25519_PublicKey(alg_id, key_bits);
+#endif
+
    return nullptr;
    }
 
@@ -154,6 +163,11 @@ Private_Key* make_private_key(const AlgorithmIdentifier& alg_id,
       return new ECDH_PrivateKey(alg_id, key_bits);
 #endif
 
+#if defined(BOTAN_HAS_CURVE_25519)
+   if(alg_name == "Curve25519")
+      return new Curve25519_PrivateKey(alg_id, key_bits, rng);
+#endif
+
    return nullptr;
    }