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| openssl [2021/03/12 12:53] – tmaier | openssl [2021/03/12 12:53] (current) – tmaier |
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| ===== X.509 ===== | ===== X.509 ===== |
| Parsing a PEM file: ''openssl x509 -text -in some_file -inform pem''<br> | * Parsing a PEM file: ''openssl x509 -text -in some_file -inform pem'' |
| Download and parse certificate: ''echo | openssl s_client -starttls=smtp -connect some_domain.tld:25 2>/dev/null | openssl x509 -text'' | * Download and parse certificate: ''echo | openssl s_client -starttls=smtp -connect some_domain.tld:25 2>/dev/null | openssl x509 -text'' |
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| ===== Connect with TLS ===== | ===== Connect with TLS ===== |
| * Connect to SMTP: ''openssl s_client -connect some_domain.tld:587 -starttls smtp''<br> | * Connect to SMTP: ''openssl s_client -connect some_domain.tld:587 -starttls smtp'' |
| * Download certificate (HTTPS w/o SNI): ''openssl s_client -showcerts -connect some_domain.tld:443 </dev/null'' | * Download certificate (HTTPS w/o SNI): ''openssl s_client -showcerts -connect some_domain.tld:443 </dev/null'' |
| * Download certificate (HTTPS w/ SNI): ''openssl s_client -showcerts -servername some_domain.tld -connect some_domain.tld:443 </dev/null'' | * Download certificate (HTTPS w/ SNI): ''openssl s_client -showcerts -servername some_domain.tld -connect some_domain.tld:443 </dev/null'' |
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