If you want to know SSL Certificate details for a URL using cURL, you can connect to the server at 443 port or HTTPS protocol with --verbose flag.
Example:
curl --verbose https://code2care.org
* Trying 172.67.164.66:443...
* Connected to code2care.org (172.67.164.66) port 443 (#0)
* ALPN: offers h2,http/1.1
* (304) (OUT), TLS handshake, Client hello (1):
* CAfile: /etc/ssl/cert.pem
* CApath: none
* (304) (IN), TLS handshake, Server hello (2):
* (304) (IN), TLS handshake, Unknown (8):
* (304) (IN), TLS handshake, Certificate (11):
* (304) (IN), TLS handshake, CERT verify (15):
* (304) (IN), TLS handshake, Finished (20):
* (304) (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / AEAD-CHACHA20-POLY1305-SHA256
* ALPN: server accepted h2
* Server certificate:
* subject: CN=code2care.org
* start date: Jul 9 03:53:07 2023 GMT
* expire date: Oct 7 03:53:06 2023 GMT
* subjectAltName: host "code2care.org" matched cert's "code2care.org"
* issuer: C=US; O=Google Trust Services LLC; CN=GTS CA 1P5
* SSL certificate verify ok.You will see all details related to the Server SSL under "Server certificate"
Facing issues? Have Questions? Post them here! I am happy to answer!
Author Info:
Rakesh (He/Him) has over 14+ years of experience in Web and Application development. He is the author of insightful How-To articles for Code2care.
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You can also reach out to him via e-mail: rakesh@code2care.org
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