fix https://gitee.com/dromara/hutool/issues/I3YP53 修复问题

add 新增生成共享秘钥的方法
add 新增验证的方法
add 新增生成谷歌验证器扫码字符串生成的方法

hutool-crypto/src/test/java/cn/hutool/crypto/test/digest/OTPTest.java

@@ -0,0 +1,43 @@
+package cn.hutool.crypto.test.digest;
+
+import cn.hutool.core.codec.Base32;
+import cn.hutool.crypto.digest.otp.TOTP;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.time.Instant;
+
+/**
+ * @author: xlgogo@outlook.com
+ * @date: 2021-07-01 18:14
+ * @description:
+ */
+public class OTPTest {
+	@Test
+	public void genKey(){
+		String key = TOTP.generateSecretKey(8);
+		System.out.println(key);
+	}
+
+	@Test
+	public void valid(){
+		String key = "VYCFSW2QZ3WZO";
+		// 2021/7/1下午6:29:54 显示code为 106659
+		//Assert.assertEquals(new TOTP(Base32.decode(key)).generate(Instant.ofEpochSecond(1625135394L)),106659);
+		TOTP totp = new TOTP(Base32.decode(key));
+		Instant instant = Instant.ofEpochSecond(1625135394L);
+		Assert.assertTrue(totp.validate(instant,0,106659));
+		Assert.assertTrue(totp.validate(instant.plusSeconds(30),1,106659));
+		Assert.assertTrue(totp.validate(instant.plusSeconds(60),2,106659));
+
+		Assert.assertFalse(totp.validate(instant.plusSeconds(60),1,106659));
+		Assert.assertFalse(totp.validate(instant.plusSeconds(90),2,106659));
+	}
+
+	@Test
+	public void googleAuthTest(){
+		String str = TOTP.generateGoogleSecretKey("xl7@qq.com", 10);
+		System.out.println(str);
+	}
+
+}