Openssl - For Windows

| From | To | Command | |------|----|---------| | PEM → DER | Binary | openssl x509 -in cert.pem -outform DER -out cert.der | | DER → PEM | Text base64 | openssl x509 -inform DER -in cert.der -outform PEM -out cert.pem | | PEM + key → PKCS#12 (.pfx) | Archive | openssl pkcs12 -export -out archive.pfx -inkey private.key -in cert.pem | | PKCS#12 → PEM | Extract | openssl pkcs12 -in archive.pfx -out extracted.pem -nodes |

openssl x509 -req -days 365 -in your_key_name.csr -signkey your_key_name.key -out your_key_name.crt openssl for windows

For the Windows administrator or developer, the lesson is clear: be cautious of where you get your binaries, keep your libraries updated, and learn to translate between the world of Linux PEM files and Windows PFX certificates. The bridge between these two ecosystems is built on OpenSSL, and it isn't going anywhere. | From | To | Command | |------|----|---------|

OpenSSL 3.4.0 22 Oct 2024 (Library: OpenSSL 3.4.0 22 Oct 2024) keep your libraries updated

openssl x509 -in cert.pem -text -noout