add dependencies to repo

[matrix_esp_thesis] / ext / olm / lib / ed25519 / src / keypair.c

diff --git a/ext/olm/lib/ed25519/src/keypair.c b/ext/olm/lib/ed25519/src/keypair.c
new file mode 100644 (file)
index 0000000..dc1b8ec
--- /dev/null
+++ b/ext/olm/lib/ed25519/src/keypair.c
@@ -0,0 +1,16 @@
+#include "ed25519.h"
+#include "sha512.h"
+#include "ge.h"
+
+
+void ed25519_create_keypair(unsigned char *public_key, unsigned char *private_key, const unsigned char *seed) {
+    ge_p3 A;
+
+    sha512(seed, 32, private_key);
+    private_key[0] &= 248;
+    private_key[31] &= 63;
+    private_key[31] |= 64;
+
+    ge_scalarmult_base(&A, private_key);
+    ge_p3_tobytes(public_key, &A);
+}