add gen X25519 private key

common/crypt/sha.go

@@ -1,11 +0,0 @@
-package crypt
-
-import (
-	"crypto/sha256"
-	"encoding/hex"
-)
-
-func GenShaHash(data []byte) string {
-	d := sha256.Sum256(data)
-	return hex.EncodeToString(d[:])
-}

common/crypt/x25519.go

@@ -0,0 +1,13 @@
+package crypt
+
+import (
+	"crypto/sha256"
+)
+
+func GenX25519Private(data []byte) []byte {
+	key := sha256.Sum256(data)
+	key[0] &= 248
+	key[31] &= 127
+	key[31] |= 64
+	return key[:32]
+}