Java Cryptography Extension Example Codes

I put all JCE related codes here so that I have my own learning trail to grasp Java Cryptography Extension. Other than Java Crypto standard library, you can find also Bouncycastle(bouncycastle.org) library used. A single file should be executable with single bouncycastle dependency. Except the classname in capitalized naming.

Command to Generate Keys

ssh-keygen

$ ssh-keygen [-b 1024|2048] [-t rsa | ecdsa] -f keyfile.key
$ ssh-keygen -e -m [PKCS8|PEM] -f keyfile.key # export public key

openssl

$ openssl genrsa -out keyfile.key 2048
$ openssl rsa -in keyfile.key -pubout
$ openssl pkcs8 -topk8 -inform PEM -in keyfile.key -out keyfile.pk8 -nocrypt

java.security.KeyPair

$ groovy gen-rsa-keypair.groovy