init

ed25519/ref10/keypair.c

@@ -0,0 +1,46 @@
+#include <string.h>
+#include "randombytes.h"
+#include "crypto_sign.h"
+#include "crypto_hash_sha512.h"
+#include "ge.h"
+
+int crypto_sign_seckey_expand(unsigned char *sk,const unsigned char *seed)
+{
+  crypto_hash_sha512(sk,seed,32);
+  sk[0] &= 248;
+  sk[31] &= 63;
+  sk[31] |= 64;
+
+  return 0;
+}
+
+int crypto_sign_seckey(unsigned char *sk)
+{
+  unsigned char seed[32];
+
+  if (randombytes(seed,32) < 0)
+    return -1;
+
+  crypto_sign_seckey_expand(sk,seed);
+
+  return 0;
+}
+
+int crypto_sign_pubkey(unsigned char *pk,const unsigned char *sk)
+{
+  ge_p3 A;
+
+  ge_scalarmult_base(&A,sk);
+  ge_p3_tobytes(pk,&A);
+
+  return 0;
+}
+
+
+int crypto_sign_keypair(unsigned char *pk,unsigned char *sk)
+{
+  crypto_sign_seckey(sk);
+  crypto_sign_pubkey(pk,sk);
+
+  return 0;
+}