Tips and Tricks for dealing with SSL
openssl req -out CSR.csr -new -newkey rsa:2048 -nodes -keyout privateKey.key
Generate a self-signed certificate (see How to Create and Install an Apache Self Signed Certificate for more info)
openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:2048 -keyout privateKey.key -out certificate.crt
openssl req -out CSR.csr -key privateKey.key -new
openssl x509 -x509toreq -in certificate.crt -out CSR.csr -signkey privateKey.key
openssl req -text -noout -verify -in CSR.csr
openssl rsa -in privateKey.key -check
openssl x509 -in certificate.crt -text -noout
openssl pkcs12 -info -in keyStore.p12
openssl s_client -connect www.paypal.com:443
openssl rsa -in privateKey.pem -out newPrivateKey.pem
These commands allow you to convert certificates and keys to different formats to make them compatible with specific types of servers or software. For example, you can convert a normal PEM file that would work with Apache to a PFX (PKCS#12) file and use it with Tomcat or IIS. Use our SSL Converter to convert certificates without messing with OpenSSL.
openssl x509 -inform der -in certificate.cer -out certificate.pem
openssl x509 -outform der -in certificate.pem -out certificate.der
openssl pkcs12 -in keyStore.pfx -out keyStore.pem -nodes
You can add -nocerts
to only output the private key or add -nokeys
to only output the certificates.
openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt -certfile CACert.crt