I will show you how to generate the following files using OpenSSL.

• Private Key
• Certificate Signing Request
• X.509 Certificate/Public Key
• PKCS12 Keystore

Generate the Private Key with 1024 key size – test.key

• openssl genrsa -out test.key 1024

Generate the Certificate Signing Request – test.csr

• openssl req -new -key test.key -out test.csr

Generate the X.509 Certificate/Public Key which has 365 effective days – test.cert

• openssl x509 –req –days 365 -in test.csr -signkey test.key -sha1 –out test.cert

Generate the PKCS12 Keystore – text.p12

• openssl pkcs12 -name test -export -in test.cert -inkey test.key -out test.p12

Done =)