Checking Subject Alternative Name (SAN) and Extensions

To verify the Subject Alternative Name (SAN) entries in a certificate:

Bash
    
 
openssl x509 -in cert.pem -text -noout | grep -A1 "Subject Alternative Name"
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To check for extensions in a certificate:

Bash
    
 
openssl x509 -in cert.pem -text -noout | grep "X509v3"
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Last updated on Nov 19, 2024

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