Validate SSL certificate using OpenSSL command

Check a Certificate Signing Request (CSR) $openssl req -text -noout -verify -in CSR.csr Check a private key $openssl rsa -in privateKey.key -check Check a certificate $openssl x509 -in certificate.crt -text -noout Check a PKCS#12 file (.pfx or .p12) $openssl pkcs12 -info -in keyStore.p12