[v3_req] keyUsage = keyEncipherment, dataEncipherment extendedKeyUsage = serverAuth subjectAltName = @alt_names
Add OpenSSL as a profile in Windows Terminal (JSON settings): openssl for windows 11
function New-SelfSignedCertOpenSSL param([string]$CN = "localhost", [int]$Days = 365) $keyPath = "$env:TEMP\$CN.key" $crtPath = "$env:TEMP\$CN.crt" openssl req -x509 -newkey rsa:2048 -keyout $keyPath -out $crtPath -days $Days -nodes -subj "/CN=$CN" openssl pkcs12 -export -out "$env:TEMP\$CN.pfx" -inkey $keyPath -in $crtPath -password pass: Import-PfxCertificate -FilePath "$env:TEMP\$CN.pfx" -CertStoreLocation Cert:\LocalMachine\My Remove-Item $keyPath, $crtPath, "$env:TEMP\$CN.pfx" Mastery of key generation
[req] distinguished_name = req_distinguished_name req_extensions = v3_req prompt = no [req_distinguished_name] CN = myapp.local debug production issues
openssl crl -in root.crl -text -noout openssl verify -crl_check -CAfile root.crt -CRLfile root.crl server.crt openssl rand -base64 32 9. Conclusion OpenSSL on Windows 11 is not merely a port of a Linux utility; it is an essential cryptographic Swiss Army knife that fills gaps left by native Windows tools. Through careful selection of installation method – whether precompiled binaries for simplicity, WSL for Linux compatibility, or Git Bash for lightweight use – professionals can integrate OpenSSL seamlessly into their Windows workflows. Mastery of key generation, CSR creation, certificate conversion, and TLS testing empowers administrators to secure internal services, debug production issues, and automate certificate lifecycle management.