1 files changed, 51 insertions, 0 deletions
diff --git a/src/ext/ed25519/ref10/keypair.c b/src/ext/ed25519/ref10/keypair.c
new file mode 100644
index 0000000000..7ddbaa971e
--- /dev/null
+++ b/src/ext/ed25519/ref10/keypair.c
@@ -0,0 +1,51 @@
+/* Modified for Tor: new API, 64-byte secret keys. */
+#include <string.h>
+#include "randombytes.h"
+#include "crypto_sign.h"
+#include "crypto_hash_sha512.h"
+#include "ge.h"
+
+int
+crypto_sign_seckey(unsigned char *sk)
+{
+  unsigned char seed[32];
+
+  if (randombytes(seed,32) < 0)
+    return -1;
+
+  crypto_sign_seckey_expand(sk, seed);
+
+  memwipe(seed, 0, 32);
+
+  return 0;
+}
+
+int crypto_sign_seckey_expand(unsigned char *sk, const unsigned char *skseed)
+{
+  crypto_hash_sha512(sk,skseed,32);
+  sk[0] &= 248;
+  sk[31] &= 63;
+  sk[31] |= 64;
+
+  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;
+}
+