1 files changed, 27 insertions, 0 deletions
diff --git a/src/curve25519.c b/src/curve25519.c
new file mode 100644
index 0000000..bfd2f58
--- /dev/null
+++ b/src/curve25519.c
@@ -0,0 +1,27 @@
+#include "curve25519-donna.h"
+
+#if !defined(CURVE25519_SUFFIX)
+#define CURVE25519_SUFFIX 
+#endif
+
+#define CURVE25519_FN3(fn,suffix) fn##suffix
+#define CURVE25519_FN2(fn,suffix) CURVE25519_FN3(fn,suffix)
+#define CURVE25519_FN(fn)         CURVE25519_FN2(fn,CURVE25519_SUFFIX)
+
+void
+CURVE25519_FN(curve25519_donna) (curve25519_key mypublic, const curve25519_key secret, const curve25519_key basepoint) {
+	curve25519_key e;
+	size_t i;
+
+	for (i = 0;i < 32;++i) e[i] = secret[i];
+	e[0] &= 0xf8;
+	e[31] &= 0x7f;
+	e[31] |= 0x40;
+	curve25519_scalarmult_donna(mypublic, e, basepoint);
+}
+
+void
+CURVE25519_FN(curve25519_donna_basepoint) (curve25519_key mypublic, const curve25519_key secret) {
+	static const curve25519_key basepoint = {9};
+	CURVE25519_FN(curve25519_donna)(mypublic, secret, basepoint);
+}