Openssl For Windows 11 <2026 Edition>

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"

openssl s_client -starttls smtp -connect mail.example.com:587 4.5.1 Compute SHA-256 Hash openssl for windows 11

openssl base64 -in certificate.crt -out cert.b64 5.1 Importing Certificates into Windows Certificate Store After converting to PKCS#12 or DER, use PowerShell or certlm.msc (Local Machine) / certmgr.msc (Current User). openssl for windows 11

openssl enc -aes-256-cbc -salt -in secret.txt -out secret.enc -k myStrongPassword openssl for windows 11

openssl s_client -connect example.com:443 -servername example.com The -servername flag enables SNI (Server Name Indication).