添加 同态加密算法 Paillierr

hutool-crypto/src/test/java/cn/hutool/crypto/asymmetric/PaillierTest.java

@@ -0,0 +1,49 @@
+package cn.hutool.crypto.asymmetric;
+
+import org.junit.Test;
+
+import java.math.BigInteger;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * @author Revers.
+ **/
+public class PaillierTest {
+	@Test
+	public void test() throws NoSuchAlgorithmException {
+		//生成 公钥和私钥
+		PaillierKeyPair paillierKeyPair = Paillier.generateKey();
+		PaillierpublicKey publicKey = paillierKeyPair.getPublicKey();
+		PaillierPrivateKey privateKey = paillierKeyPair.getPrivateKey();
+
+		//创建两个大整数m1,m2:
+		BigInteger m1 = new BigInteger("10");
+		BigInteger m2 = new BigInteger("40");
+
+		//公钥加密私钥解
+		byte[] em1 = Paillier.encrypt(m1, publicKey);
+		System.out.println("m1解密结果" + Paillier.decrypt(em1, privateKey));
+
+		//同态特性
+		byte[] em2 = Paillier.encrypt(m2, publicKey);
+		System.out.println("m1加密em1 :"+ new BigInteger(em1).toString(16));
+		System.out.println("m2加密em2 :"+ new BigInteger(em2).toString(16));
+		byte[] add = Paillier.add(em1, em2, publicKey);
+		System.out.println("m1+m2 密文的和：" + new BigInteger(add).toString(16));
+		System.out.println("m1+m2 密文的和的解：" + Paillier.decrypt(add,privateKey));
+
+		byte[] mul = Paillier.multiply(em1, m2, publicKey);
+		System.out.println("m1*m2 密文的积：" + new BigInteger(mul).toString(16));
+		System.out.println("m1*m2 密文的积的解：" + Paillier.decrypt(mul,privateKey));
+
+		//加解密字符串
+		String s = "123456dfsgsdg!@#%!@@#$!#%是豆腐干山豆根v啊微软";
+		System.out.println("字符串明文： "+s);
+
+		byte[] encrypt = Paillier.encryptString(s, publicKey);
+		System.out.println("字符串密文： "+ new BigInteger(encrypt).toString(16) );
+
+		String decrypt = Paillier.decryptString(encrypt, privateKey);
+		System.out.println("字符串密文解密： "+ decrypt);
+	}
+}