tldr/pages/common/openssl-x509.md

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2020-10-28 19:03:16 +00:00
# openssl x509
> OpenSSL command to manage X.509 certificates.
> More information: <https://www.openssl.org/docs/manmaster/man1/openssl-x509.html>.
- Display certificate information:
`openssl x509 -in {{filename.crt}} -noout -text`
- Display a certificate's expiration date:
`openssl x509 -enddate -noout -in {{filename.pem}}`
- Convert a certificate between binary DER encoding and textual PEM encoding:
`openssl x509 -inform {{der}} -outform {{pem}} -in {{original_certificate_file}} -out {{converted_certificate_file}}`
- Store a certificate's public key in a file:
`openssl x509 -in {{certificate_file}} -noout -pubkey -out {{output_file}}`