hash & sm4 & cert(未测试)

src/main/java/minsecurity/certificate/X509/X509CertUtil.java

@@ -0,0 +1,42 @@
+package minsecurity.certificate.X509;
+
+import java.security.*;
+import java.security.cert.CertificateException;
+import java.security.cert.X509Certificate;
+import java.util.Date;
+
+/*
+ * @Author: hongyu guo
+ * @Description:
+ * @Version: 1.0.0
+ * @Date: 15:59 2021/03/05
+ * @Copyright: MIN-Group；国家重大科技基础设施——未来网络北大实验室；深圳市信息论与未来网络重点实验室
+ */
+public class X509CertUtil {
+
+    public static boolean verify(X509Certificate certificate, PublicKey publicKey){
+        try {
+            certificate.verify(publicKey);
+
+        } catch (CertificateException | NoSuchAlgorithmException |
+                InvalidKeyException | NoSuchProviderException | SignatureException e) {
+            e.printStackTrace();
+            return false;
+        }
+        return true;
+    }
+
+    public static boolean isExpired(X509Certificate certificate){
+        Date notAfter = certificate.getNotAfter();
+        Date notBefore = certificate.getNotBefore();
+        long now = System.currentTimeMillis();
+        return now < notBefore.getTime() || now > notAfter.getTime();
+    }
+
+    public static boolean isValid(X509Certificate certificate, PublicKey publicKey){
+        boolean isExpired = isExpired(certificate);
+        boolean isVerify = verify(certificate, publicKey);
+        return !isExpired & isVerify;
+    }
+
+}