Java Utililty Methods Key Pair Create

List of utility methods to do Key Pair Create

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Description

The list of methods to do Key Pair Create are organized into topic(s).

Method

voidgenerateKeyPair(int keySize, String fileChavePublica, String fileChavePrivada)
generate Key Pair 
KeyPairGenerator pairgen = KeyPairGenerator.getInstance("RSA");
SecureRandom random = new SecureRandom();
pairgen.initialize(keySize, random);
KeyPair keyPair = pairgen.generateKeyPair();
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(fileChavePublica));
out.writeObject(keyPair.getPublic());
out.close();
out = new ObjectOutputStream(new FileOutputStream(fileChavePrivada));
...
KeyPairgenerateKeyPair(int keySizeInBits, String algo)
generate Key Pair 
KeyPairGenerator kg = KeyPairGenerator.getInstance(algo);
kg.initialize(keySizeInBits);
return kg.generateKeyPair();
KeyPairgenerateKeyPair(int len)
generate Key Pair 
KeyPairGenerator kpGen;
try {
    kpGen = KeyPairGenerator.getInstance("RSA");
} catch (NoSuchAlgorithmException e) {
    throw new IllegalStateException("RSA algorithm not supported!?", e);
kpGen.initialize(len, new SecureRandom());
return kpGen.generateKeyPair();
...
KeyPairgenerateKeyPair(int size)
This method generates a key pair for RSA encryption. 
try {
    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(RSA_ALGORITHM_NAME);
    keyPairGenerator.initialize(size);
    return keyPairGenerator.genKeyPair();
} catch (NoSuchAlgorithmException e) {
    throw new RuntimeException("Could not generate RSA key pair!", e);
KeyPairgenerateKeyPair(String algo)
generate Key Pair 
KeyPairGenerator kpg = KeyPairGenerator.getInstance(algo);
return kpg.genKeyPair();
KeyPairgenerateKeyPair(String algo, int keyLength, String provider)
Generate a random asymmetric key pair. 
KeyPairGenerator keyGenerator = null;
if (provider != null) {
    keyGenerator = KeyPairGenerator.getInstance(algo, provider);
} else {
    keyGenerator = KeyPairGenerator.getInstance(algo);
keyGenerator.initialize(keyLength);
return keyGenerator.generateKeyPair();
...
KeyPairgenerateKeyPair(String algorithm, int bits)
Generates a key pair of given algorithm and strength. 
KeyPairGenerator generator = null;
if (provider == null) {
    generator = KeyPairGenerator.getInstance(algorithm);
} else {
    generator = KeyPairGenerator.getInstance(algorithm, provider);
generator.initialize(bits);
return generator.generateKeyPair();
...
KeyPairgenerateKeyPair(String algorithm, int keySize)
generate Key Pair 
return createKeyPairGenerator(algorithm, keySize).generateKeyPair();
KeyPairgenerateKeyPair(String algorithm, int keysize)
generate Key Pair 
if (algorithm.equalsIgnoreCase("RSA") && keysize < 1024)
    throw new IllegalArgumentException("key size should be 1024 or higher");
KeyPairGenerator keyGen = KeyPairGenerator.getInstance(algorithm);
SecureRandom rnd = null;
try {
    rnd = SecureRandom.getInstanceStrong();
} catch (NoSuchAlgorithmException e) {
    rnd = new SecureRandom();
...
KeyPairgenerateKeyPair(String algorithm, int size)
generate Key Pair 
KeyPairGenerator keyGen = null;
try {
    keyGen = KeyPairGenerator.getInstance(algorithm);
} catch (NoSuchAlgorithmException e) {
    throw new KeyException("Cannot initialize keypair generator", e);
SecureRandom random = new SecureRandom();
keyGen.initialize(size, random);
...