Use X64 ASM ed25519 signatures on Linux/x64, which are about 10X faster. Will matter a lot for network controllers, not so much for other things.

1 files changed, 25 insertions, 0 deletions

diff --git a/ext/ed25519-amd64-asm/keypair.c b/ext/ed25519-amd64-asm/keypair.c
new file mode 100644
index 00000000..7e094710
--- /dev/null
+++ b/ext/ed25519-amd64-asm/keypair.c
@@ -0,0 +1,25 @@
+#include <string.h>
+#include "crypto_sign.h"
+#include "crypto_hash_sha512.h"
+#include "randombytes.h"
+#include "ge25519.h"
+
+int crypto_sign_keypair(unsigned char *pk,unsigned char *sk)
+{
+  unsigned char az[64];
+  sc25519 scsk;
+  ge25519 gepk;
+
+  randombytes(sk,32);
+  crypto_hash_sha512(az,sk,32);
+  az[0] &= 248;
+  az[31] &= 127;
+  az[31] |= 64;
+
+  sc25519_from32bytes(&scsk,az);
+  
+  ge25519_scalarmult_base(&gepk, &scsk);
+  ge25519_pack(pk, &gepk);
+  memmove(sk + 32,pk,32);
+  return 0;
+}