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Java Bouncy Castle Generate Rsa Key Pair Chart

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The KeyPairGenerator class is used to generate pairs of public and private keys. Key pair generators are constructed using the getInstance factory methods (static methods that return instances of a given class). A Key pair generator for a particular algorithm creates a public/private key pair that can be used with this algorithm. But I need getEncoded method available in Java which is not available in BC library in C#. This getEncoded method is used to convert given key into X.509 encoded key.In case of Java, public key getting twice converted (getencoded and getBytes),I.

packageme.txedo.security;

importjava.io.FileNotFoundException;

importjava.io.IOException;

importjava.security.Key;

importjava.security.KeyPair;

importjava.security.KeyPairGenerator;

importjava.security.NoSuchAlgorithmException;

importjava.security.NoSuchProviderException;

importjava.security.Security;

importjava.security.interfaces.RSAPrivateKey;

importjava.security.interfaces.RSAPublicKey;

importorg.apache.log4j.Logger;

importorg.bouncycastle.jce.provider.BouncyCastleProvider;

publicclassMain {

protectedfinalstaticLoggerLOGGER=Logger.getLogger(Main.class);

publicstaticfinalintKEY_SIZE=1024;

publicstaticvoidmain(String[] args) throwsFileNotFoundException, IOException, NoSuchAlgorithmException, NoSuchProviderException {

Security.addProvider(newBouncyCastleProvider());

LOGGER.info('BouncyCastle provider added.');

KeyPair keyPair = generateRSAKeyPair();

RSAPrivateKey priv = (RSAPrivateKey) keyPair.getPrivate();

RSAPublicKey pub = (RSAPublicKey) keyPair.getPublic();

writePemFile(priv, 'RSA PRIVATE KEY', 'id_rsa');

writePemFile(pub, 'RSA PUBLIC KEY', 'id_rsa.pub');

}

privatestaticKeyPairgenerateRSAKeyPair() throwsNoSuchAlgorithmException, NoSuchProviderException {

KeyPairGenerator generator =KeyPairGenerator.getInstance('RSA', 'BC');

generator.initialize(KEY_SIZE);

KeyPair keyPair = generator.generateKeyPair();

LOGGER.info('RSA key pair generated.');

return keyPair;

}

privatestaticvoidwritePemFile(Keykey, Stringdescription, Stringfilename)

throwsFileNotFoundException, IOException {

PemFile pemFile =newPemFile(key, description);

pemFile.write(filename);

LOGGER.info(String.format('%s successfully writen in file %s.', description, filename));

}

}

Java Bouncycastle Generate Rsa Key Pair Using Openssl

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