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 +1,48 @@
+package sm2a
+
+import (
+	"fmt"
+	"io"
+	"math/big"
+
+	"xdx.jelly/xgcl/gmath"
+	"xdx.jelly/xgcl/sm/sm2"
+)
+
+type ClientEncKeyGenContext struct {
+	ClientKey *sm2.PrivateKey
+	Pubkey    *sm2.PublicKey
+}
+
+func NewClientEncKeyGenContext() *ClientEncKeyGenContext {
+	return &ClientEncKeyGenContext{
+		ClientKey: sm2.NewPrivateKey(),
+		Pubkey:    sm2.NewPublicKey(),
+	}
+}
+
+// ClientKeyGen_one 客户端加密密钥生成第一步
+func (c *ClientEncKeyGenContext) ClientKeyGen_one(rand io.Reader) ([]byte, error) {
+	buf := make([]byte, sm2.ByteSize())
+	if n, err := rand.Read(buf); n != len(buf) || err != nil {
+		return nil, fmt.Errorf("Generate random number error")
+	}
+	c.ClientKey.SetBytes(buf)
+
+	c.ClientKey.D.Mod(c.ClientKey.D, sm2.OrderN())
+	c.Pubkey = sm2.GenPublicKey(c.ClientKey)
+	out := make([]byte, 0, 2*sm2.ByteSize())
+	out = append(out, gmath.BigIntToNByte(c.Pubkey.X, sm2.ByteSize())...)
+	out = append(out, gmath.BigIntToNByte(c.Pubkey.Y, sm2.ByteSize())...)
+	return out, nil
+}
+
+// ClientKeyGen_one 客户端加密密钥生成第二步
+func (c *ClientEncKeyGenContext) ClientKeyGen_two(in []byte) error {
+	x := new(big.Int)
+	y := new(big.Int)
+	x.SetBytes(in[:sm2.ByteSize()])
+	y.SetBytes(in[sm2.ByteSize() : 2*sm2.ByteSize()])
+	c.Pubkey.X, c.Pubkey.Y = sm2.Curve().Add(c.Pubkey.X, c.Pubkey.Y, x, y)
+	return nil
+}