We running 2 application on amazon EC2 (backend.example.com & frontend.example.com). For that application, we used a paid SSL Certificate. That certificate expiration date at 2021 June. But today, we got an error -
cURL error 60: SSL certificate problem: certificate has expired (see http://curl.haxx.se/libcurl/c/libcurl-errors.html)
We check certificate expiration date, but there was no problem (2021 June). Then we follow this thread - curl: (60) SSL certificate problem: unable to get local issuer certificate (@Dahomz answer)
After that, when we curl example.com by - curl -v --url https://backend.example.com --cacert /etc/ssl/ssl.cert/cacert.pem, It working fine. Response like -
* Rebuilt URL to: https://backend.example.com/
* Trying 127.0.0.1...
* Connected to backend.example.com (127.0.0.1) port 443 (#0)
* found 139 certificates in /etc/ssl/ssl.cert/cacert.pem
* found 600 certificates in /etc/ssl/certs
* ALPN, offering http/1.1
* SSL connection using TLS1.2 / ******_RSA_***_***_GCM_*****
* server certificate verification OK
* server certificate status verification SKIPPED
* common name: *.example.com (matched)
* server certificate expiration date OK
* server certificate activation date OK
* certificate public key: RSA
* certificate version: #3
* subject: OU=Domain Control Validated,OU=PositiveSSL Wildcard,CN=*.example.xyz
* start date: Mon, 04 May 2019 00:00:00 GMT
* expire date: Wed, 07 June 2021 23:59:59 GMT
* issuer: C=GB,ST=Greater Manchester,L=Salford,O=Sectigo Limited,CN=Sectigo RSA Domain Validation Secure Server CA
* compression: NULL
* ALPN, server accepted to use http/1.1
But when we hit from frontend.example.com to backend.example.com by curl, it throws this error -
* Rebuilt URL to: https://backend.example.com/
* Trying 127.0.0.1...
* Connected to backend.example.com (127.0.0.1) port 443 (#0)
* ALPN, offering http/1.1
* Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
* successfully set certificate verify locations:
* CAfile: /etc/ssl/ssl.cert/cacert.pem
CApath: /etc/ssl/certs
* SSL connection using TLSv1.2 / *****-RSA-*****-GCM-******
* ALPN, server accepted to use http/1.1
* Server certificate:
* subject: OU=Domain Control Validated; OU=PositiveSSL Wildcard; CN=*.example.com
* start date: Mar 4 00:00:00 2019 GMT
* expire date: Apr 7 23:59:59 2021 GMT
* issuer: C=GB; ST=Greater Manchester; L=Salford; O=Sectigo Limited; CN=Sectigo RSA Domain Validation Secure Server CA
* SSL certificate verify result: certificate has expired (10), continuing anyway.
My curl code -
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://backend.example.com");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_STDERR, fopen(public_path("c.log"), 'w'));
curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
$output = curl_exec($ch);
$error = curl_error($ch);
$info = curl_getinfo($ch);
curl_close($ch);
To fix the problem, remove the expired root certificate from your domain certificate.