不需要密码，身份加载默认都是无密码的，所以代码回滚了

src/main/java/security/IdentityManager.java

@@ -311,10 +311,10 @@ public class IdentityManager {
      * @author hongyu guo
      * @date 2021/5/21
     **/
-    public boolean loadCert(String identityName, Certificate cert,String passwd) throws Exception {
+    public boolean loadCert(String identityName, Certificate cert) throws Exception {
         if(existIdentity(identityName)) {
             // 已经存在
-            Identity id = Persist.getIdentityByNameFromStorage(identityName, passwd);
+            Identity id = Persist.getIdentityByNameFromStorage(identityName, "");
             if(id == null)
                 throw new IdentifyManagerException("can not find identity by name [" + identityName + "] in sqlite");
             Certificate oldCert = id.getCert();
@@ -338,9 +338,6 @@ public class IdentityManager {
         }
         return true;
     }
-    public boolean loadCert(String identityName, Certificate cert) throws Exception {
-        return loadCert(identityName,cert,"");
-    }
 
     /**
      * 使用指定的网络身份给自己签发一个自签证书
@@ -475,7 +472,7 @@ public class IdentityManager {
     public boolean importCert(byte[] bytesOfCert,byte[] passwd) throws Exception {
         Certificate cert = CertUtils.fromPem(new String(bytesOfCert), passwd, Common.SM4ECB);
         LoggerHelper.info("importing cert: "+cert.toString());
-        return loadCert(cert.getIssueTo(), cert,new String(passwd));
+        return loadCert(cert.getIssueTo(), cert);
     }
 
     public ConcurrentMap<String, Identity> getIdentifies() {