openssl req -new -key private.key -out request.csr -subj "/C=US/ST=Texas/L=Austin/O=MyOrg/CN=myserver.example.com"
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 for windows 11
openssl dgst -sha256 important.exe Outputs: SHA256(important.exe)= a1b2c3... openssl req -new -key private
openssl enc -d -aes-256-cbc -in secret.enc -out decrypted.txt -k myStrongPassword Through careful selection of installation method – whether
Add OpenSSL as a profile in Windows Terminal (JSON settings):
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.
[ req ] default_bits = 2048 default_keyfile = privkey.pem distinguished_name = req_distinguished_name string_mask = utf8only [ req_distinguished_name ] countryName = Country Name (2 letter code) countryName_default = US stateOrProvinceName = State or Province Name stateOrProvinceName_default = California localityName = Locality Name 0.organizationName = Organization Name organizationalUnitName = Organizational Unit Name commonName = Common Name (FQDN) commonName_default = localhost emailAddress = Email Address All commands below assume OpenSSL is in PATH and openssl.cnf is correctly configured. Run in Command Prompt, PowerShell, or Windows Terminal. 4.1 Key and Certificate Generation 4.1.1 Generate an RSA Private Key (2048-bit)