Invalid iOS Certificate

Invalid iOS Certificate

The iOS certificate suddenly becomes invalid.

 

This morning, an error occurred while packing at work.

 

According to the error message, I went to the "key string" and checked the certificate. The certificate was inexplicably invalid. It was good yesterday.

Go back to the key string and obtain the certificate from the certificate issuing center. Then log on to the developer account and apply for the certificate again. Then, add the certificate to the key string and package it again to find that the certificate you just applied for is still invalid. It took about half a day to find a solution.

 

Solution:

Method 1:

1. Open the key string in the system

2. Click "Log on" in the upper-left key string and click "certificate" in the lower-left category"

3. Select "Apple Worldwide Developer Certification Authority", right-click, and select "view overview"

4. Find and expand the trust, and change the first one to always trust,

 

 

Then let's see if the certificate is back to normal.

 

 

Method 2:

1. Download this file

Https://developer.apple.com/certificationauthority/applewwdrca.cerand install it.

2. Select "Log on" in the "key string" and click "certificate". On this page, select "show"-> "show expired certificates" in the toolbar ", at this time, you will find an expired "WWDR Certificate" (Apple Worldwide Developer Relations Certification Authority) and delete it.

3. Delete the expired "WWDR Certificate" in the system column.

4. Your certificate changed from "This certificate has an invalid issuer" (The issuer of This certificate is invalid) to "This certificate is valid.