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, 9 insertions, 0 deletions

diff --git a/src/cmd/keygen.cpp b/src/cmd/keygen.cpp
index 3054b98ee..ae23ce45e 100644
--- a/src/cmd/keygen.cpp
+++ b/src/cmd/keygen.cpp
@@ -17,6 +17,10 @@
 #include <botan/ecdsa.h>
 #endif
 
+#if defined(BOTAN_HAS_CURVE_25519)
+#include <botan/curve25519.h>
+#endif
+
 using namespace Botan;
 
 namespace {
@@ -55,6 +59,11 @@ Private_Key* gen_key(RandomNumberGenerator& rng, const std::string& algo, size_t
       }
 #endif
 
+#if defined(BOTAN_HAS_CURVE_25519)
+   if(algo == "curve25519")
+      return new Curve25519_PrivateKey(rng);
+#endif
+
    throw std::runtime_error("Unknown algorithm " + algo);
    }