init: v1.0.0

2026-05-27 23:03:00 +08:00
commit 8d97f750eb
466 changed files with 80067 additions and 0 deletions
@@ -0,0 +1,44 @@
+package sm2m
+
+import (
+	"crypto/rand"
+	"io"
+	"math/big"
+
+	"xdx.jelly/xgcl/gerrors"
+	"xdx.jelly/xgcl/gmath"
+	"xdx.jelly/xgcl/sm/sm2"
+)
+
+// ClientGenAuthKey 生成客户端授权密钥
+// dc' = dc * r
+func ClientGenAuthKey(clientKey *sm2.PrivateKey, rnd io.Reader) (*sm2.PrivateKey, []byte, error) {
+	var r *big.Int
+	var err error
+	for r == nil || gmath.IsBigInt0(r) {
+		r, err = rand.Int(rnd, sm2.OrderN())
+		if err != nil {
+			return nil, nil, gerrors.WithAnnotating(ErrInvalidInput, "input rnd must be nil, []byte or io.Reader")
+		}
+	}
+
+	authKey := sm2.NewPrivateKey()
+
+	authKey.D.Mul(clientKey.D, r)
+	authKey.D.Mod(authKey.D, sm2.OrderN())
+	return authKey, gmath.BigIntToNByte(r, sm2.ByteSize()), nil
+}
+
+// ServerGenAuthKey 生成服务端授权密钥
+// // ds' = ds / r
+func ServerGenAuthKey(serverKey *sm2.PrivateKey, r []byte) (*sm2.PrivateKey, error) {
+	bigR := new(big.Int).SetBytes(r)
+	if gmath.IsBigInt0(bigR) || bigR.Cmp(sm2.OrderN()) >= 0 {
+		return nil, gerrors.WithAnnotating(ErrInvalidInput, "input r is zero or bigger than order N")
+	}
+	bigR.ModInverse(bigR, sm2.OrderN())
+	authKey := sm2.NewPrivateKey()
+	authKey.D.Mul(serverKey.D, bigR)
+	authKey.D.Mod(authKey.D, sm2.OrderN())
+	return authKey, nil
+}