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 +1,37 @@
+package elgamal
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"math/big"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"xdx.jelly/xgcl/grand"
+)
+
+func TestElGamal(t *testing.T) {
+	x := bigFromBase16("013d5955a5e91b8fed1b56b6bdcd467939de9bfc")
+	y := bigFromBase16("b7866990d044b1bccbbcf84c29f145ee17d4f4608c79a55e249e9e108b91e36381944fa3c0c3f51876f63bce7bb30ffde9ca02265e916dd3fb2e060b0dfeaaa67d5a359159b948c3df1141f0e0a22380a3633c1ffbcb1c228ffe4ef0bab52293bfdff4b64e3f362d63b11a4d2507f6e9e98de71aff09fdb64e3737c046044138")
+	// M := bigFromBase16("4142434445464748494a31323334353637383930")
+	// m := new(big.Int).Exp(P1024.g, M, P1024.p)
+	m, _ := rand.Int(grand.Reader, P1024.p)
+	sk := &PrivateKey{
+		x: *x,
+		PublicKey: PublicKey{
+			y:      *y,
+			Params: P1024,
+		},
+	}
+	pk := &sk.PublicKey
+	b, _ := hex.DecodeString("d8d0f2d6a3e2d745ab4410e2042a740e7a81a280")
+	c1, err := pk.Encryption(m, b)
+	assert.Nil(t, err)
+	c2, err := pk.Encryption(m, grand.Reader)
+	c, _ := new(Cipher).HomoMap(c1, c2)
+	mm0, _ := sk.Decryption(c)
+	mm1 := new(big.Int).Mul(m, m)
+	mm1.Mod(mm1, pk.Params.p)
+
+	assert.Zero(t, mm0.Cmp(mm1))
+}