feat(QMCv2): Add mapCipher & mflac/mgg key discovery

algo/qmc/cipher_rc4_test.go

@@ -0,0 +1,90 @@
+package qmc
+
+import (
+	"os"
+	"reflect"
+	"testing"
+)
+
+func loadTestRC4CipherData() ([]byte, []byte, []byte, error) {
+	key, err := os.ReadFile("./testdata/mflac0_rc4_key.bin")
+	if err != nil {
+		return nil, nil, nil, err
+	}
+	raw, err := os.ReadFile("./testdata/mflac0_rc4_raw.bin")
+	if err != nil {
+		return nil, nil, nil, err
+	}
+	target, err := os.ReadFile("./testdata/mflac0_rc4_target.bin")
+	if err != nil {
+		return nil, nil, nil, err
+	}
+
+	return key, raw, target, nil
+}
+func Test_rc4Cipher_Decrypt(t *testing.T) {
+	key, raw, target, err := loadTestRC4CipherData()
+	if err != nil {
+		t.Fatalf("load testing data failed: %s", err)
+	}
+	t.Run("overall", func(t *testing.T) {
+		c, err := NewRC4Cipher(key)
+		if err != nil {
+			t.Errorf("init rc4Cipher failed: %s", err)
+			return
+		}
+		c.Decrypt(raw, 0)
+		if !reflect.DeepEqual(raw, target) {
+			t.Error("overall")
+		}
+	})
+
+}
+
+func Test_rc4Cipher_encFirstSegment(t *testing.T) {
+	key, raw, target, err := loadTestRC4CipherData()
+	if err != nil {
+		t.Fatalf("load testing data failed: %s", err)
+	}
+	t.Run("first-block(0~128)", func(t *testing.T) {
+		c, err := NewRC4Cipher(key)
+		if err != nil {
+			t.Errorf("init rc4Cipher failed: %s", err)
+			return
+		}
+		c.Decrypt(raw[:128], 0)
+		if !reflect.DeepEqual(raw[:128], target[:128]) {
+			t.Error("first-block(0~128)")
+		}
+	})
+}
+
+func Test_rc4Cipher_encASegment(t *testing.T) {
+	key, raw, target, err := loadTestRC4CipherData()
+	if err != nil {
+		t.Fatalf("load testing data failed: %s", err)
+	}
+
+	t.Run("align-block(128~5120)", func(t *testing.T) {
+		c, err := NewRC4Cipher(key)
+		if err != nil {
+			t.Errorf("init rc4Cipher failed: %s", err)
+			return
+		}
+		c.Decrypt(raw[128:5120], 128)
+		if !reflect.DeepEqual(raw[128:5120], target[128:5120]) {
+			t.Error("align-block(128~5120)")
+		}
+	})
+	t.Run("simple-block(5120~10240)", func(t *testing.T) {
+		c, err := NewRC4Cipher(key)
+		if err != nil {
+			t.Errorf("init rc4Cipher failed: %s", err)
+			return
+		}
+		c.Decrypt(raw[5120:10240], 5120)
+		if !reflect.DeepEqual(raw[5120:10240], target[5120:10240]) {
+			t.Error("align-block(128~5120)")
+		}
+	})
+}