init: v1.0.0

pbkd/prf.go

@@ -0,0 +1,32 @@
+package pbkd
+
+import "xdx.jelly/xgcl/mac"
+
+type prfer interface {
+	prf(data []byte) ([]byte, error)
+	hLen() int64
+}
+
+const hmacSm3TagSize = 32
+
+type hmacSm3 struct {
+	m mac.MAC
+}
+
+func newPrfHmacSm3(key []byte) prfer {
+	for i := len(key); i < 16; i++ {
+		key = append(key, 0)
+	}
+	m, _ := mac.NewHMacSm3(key, hmacSm3TagSize)
+	return &hmacSm3{
+		m: m,
+	}
+}
+
+func (h *hmacSm3) prf(data []byte) ([]byte, error) {
+	return h.m.ComputeMAC(data)
+}
+
+func (h *hmacSm3) hLen() int64 {
+	return hmacSm3TagSize
+}