Example usage for java.security KeyPairGenerator initialize

List of usage examples for java.security KeyPairGenerator initialize

  1. HOME
  2. Java
  3. java
  4. java.security.*
  5. KeyPairGenerator
  6. initialize

Introduction

In this page you can find the example usage for java.security KeyPairGenerator initialize.

Prototype

public void initialize(AlgorithmParameterSpec params) throws InvalidAlgorithmParameterException

Source Link

Document

Initializes the key pair generator using the specified parameter set and the SecureRandom implementation of the highest-priority installed provider as the source of randomness.

Usage

From source file:cherry.goods.crypto.RSASignatureTest.java

private RSASignature create1() throws Exception {
    KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA");
    keygen.initialize(2048);
    KeyPair key = keygen.generateKeyPair();
    RSASignature impl = new RSASignature();
    impl.setAlgorithm("SHA256withRSA");
    impl.setPublicKeyBytes(key.getPublic().getEncoded());
    impl.setPrivateKeyBytes(key.getPrivate().getEncoded());
    return impl;/* w w w  . j  a  va  2 s  .c om*/
}

From source file:cherry.goods.crypto.RSACryptoTest.java

private RSACrypto create1() throws Exception {
    KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA");
    keygen.initialize(2048);
    KeyPair key = keygen.generateKeyPair();
    RSACrypto impl = new RSACrypto();
    impl.setAlgorithm("RSA/ECB/PKCS1Padding");
    impl.setPublicKeyBytes(key.getPublic().getEncoded());
    impl.setPrivateKeyBytes(key.getPrivate().getEncoded());
    return impl;/*w  w w  .j  a  v a  2  s .  c  om*/
}

From source file:com.microsoft.azure.management.TestContainerService.java

private String getSshKey() throws Exception {
    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
    keyPairGenerator.initialize(2048);
    KeyPair keyPair = keyPairGenerator.generateKeyPair();
    RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
    ByteArrayOutputStream byteOs = new ByteArrayOutputStream();
    DataOutputStream dos = new DataOutputStream(byteOs);
    dos.writeInt("ssh-rsa".getBytes().length);
    dos.write("ssh-rsa".getBytes());
    dos.writeInt(publicKey.getPublicExponent().toByteArray().length);
    dos.write(publicKey.getPublicExponent().toByteArray());
    dos.writeInt(publicKey.getModulus().toByteArray().length);
    dos.write(publicKey.getModulus().toByteArray());
    String publicKeyEncoded = new String(Base64.encodeBase64(byteOs.toByteArray()));
    return "ssh-rsa " + publicKeyEncoded + " ";
}

From source file:cherry.goods.crypto.RSASignatureTest.java

private RSASignature create2(char[] password) throws Exception {

    KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA");
    keygen.initialize(2048);
    KeyPair key = keygen.generateKeyPair();

    String pbeAlgName = "PBEWithMD5AndDES";
    PBEKeySpec pbeKeySpec = new PBEKeySpec(password);
    PBEParameterSpec pbeParamSpec = new PBEParameterSpec(RandomUtils.nextBytes(8), 20);
    SecretKey pbeKey = SecretKeyFactory.getInstance(pbeAlgName).generateSecret(pbeKeySpec);
    AlgorithmParameters pbeParam = AlgorithmParameters.getInstance(pbeAlgName);
    pbeParam.init(pbeParamSpec);//from w  w w.  j  a v a  2s.  c om
    Cipher cipher = Cipher.getInstance(pbeAlgName);
    cipher.init(Cipher.ENCRYPT_MODE, pbeKey, pbeParam);
    EncryptedPrivateKeyInfo encryptedKeyInfo = new EncryptedPrivateKeyInfo(pbeParam,
            cipher.doFinal(key.getPrivate().getEncoded()));

    RSASignature impl = new RSASignature();
    impl.setAlgorithm("SHA256withRSA");
    impl.setPublicKeyBytes(key.getPublic().getEncoded());
    impl.setPrivateKeyBytes(encryptedKeyInfo.getEncoded(), password);
    return impl;
}

From source file:cherry.goods.crypto.RSACryptoTest.java

private RSACrypto create2(char[] password) throws Exception {

    KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA");
    keygen.initialize(2048);
    KeyPair key = keygen.generateKeyPair();

    String pbeAlgName = "PBEWithMD5AndDES";
    PBEKeySpec pbeKeySpec = new PBEKeySpec(password);
    PBEParameterSpec pbeParamSpec = new PBEParameterSpec(RandomUtils.nextBytes(8), 20);
    SecretKey pbeKey = SecretKeyFactory.getInstance(pbeAlgName).generateSecret(pbeKeySpec);
    AlgorithmParameters pbeParam = AlgorithmParameters.getInstance(pbeAlgName);
    pbeParam.init(pbeParamSpec);/*  www .  j  a  v a  2 s. c o m*/
    Cipher cipher = Cipher.getInstance(pbeAlgName);
    cipher.init(Cipher.ENCRYPT_MODE, pbeKey, pbeParam);
    EncryptedPrivateKeyInfo encryptedKeyInfo = new EncryptedPrivateKeyInfo(pbeParam,
            cipher.doFinal(key.getPrivate().getEncoded()));

    RSACrypto impl = new RSACrypto();
    impl.setAlgorithm("RSA/ECB/PKCS1Padding");
    impl.setPublicKeyBytes(key.getPublic().getEncoded());
    impl.setPrivateKeyBytes(encryptedKeyInfo.getEncoded(), password);
    return impl;
}

From source file:com.ibm.mobilefirstplatform.clientsdk.android.security.mca.internal.security.DefaultJSONSignerTests.java

public KeyPair generateRandomKeyPair() {
    KeyPair keyPair = null;//from  w  w  w .  ja v  a 2s.  co  m

    try {
        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
        kpg.initialize(512);
        keyPair = kpg.genKeyPair();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }

    return keyPair;
}

From source file:org.springframework.security.oauth.common.signature.TestRSA_SHA1SignatureMethod.java

/**
 * tests signing and verifying./*  w w  w .  ja va  2s. c  om*/
 */
public void testSignAndVerify() throws Exception {
    KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
    generator.initialize(1024);
    KeyPair keyPair = generator.generateKeyPair();
    String baseString = "thisismysignaturebasestringthatshouldbemuchlongerthanthisbutitdoesnthavetobeandherearesomestrangecharacters!@#$%^&*)(*";

    byte[] signatureBytes;
    {
        Signature signer = Signature.getInstance("SHA1withRSA");
        signer.initSign(keyPair.getPrivate());
        signer.update(baseString.getBytes("UTF-8"));
        signatureBytes = signer.sign();
    }

    {
        Signature signer = Signature.getInstance("SHA1withRSA");
        signer.initVerify(keyPair.getPublic());
        signer.update(baseString.getBytes("UTF-8"));
        assertTrue(signer.verify(signatureBytes));
    }

    RSA_SHA1SignatureMethod signatureMethod = new RSA_SHA1SignatureMethod(keyPair.getPrivate(),
            keyPair.getPublic());
    String signature = signatureMethod.sign(baseString);
    signatureMethod.verify(baseString, signature);
}

From source file:com.formkiq.core.service.crypto.SecureTokenServiceImpl.java

@Override
public Pair<RSAPublicKey, RSAPrivateKey> initializeToken(final int keysize) throws NoSuchAlgorithmException {

    KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
    kpg.initialize(keysize);

    KeyPair kp = kpg.genKeyPair();
    RSAPublicKey publicKey = (RSAPublicKey) kp.getPublic();
    RSAPrivateKey privateKey = (RSAPrivateKey) kp.getPrivate();

    return Pair.of(publicKey, privateKey);
}

From source file:cherry.goods.crypto.VersionedSignatureTest.java

private RSASignature createRSASignature() throws Exception {
    KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA");
    keygen.initialize(2048);
    KeyPair key = keygen.generateKeyPair();
    RSASignature impl = new RSASignature();
    impl.setAlgorithm("SHA256withRSA");
    impl.setPublicKeyBytes(key.getPublic().getEncoded());
    impl.setPrivateKeyBytes(key.getPrivate().getEncoded());
    return impl;/*from  w  ww  . j  a v a 2s  . c o  m*/
}

From source file:com.bluepixel.security.manager.Server.java

private void generateKey() {
    try {/*w w w. ja va  2 s.c  o m*/
        KeyPairGenerator keyGen = KeyPairGenerator.getInstance(DEFAULT_ALGORITHM);
        keyGen.initialize(DEFAULT_KEY_LENGTH);
        KeyPair keypair = keyGen.generateKeyPair();
        PublicKey pbKey = keypair.getPublic();
        PrivateKey piKey = keypair.getPrivate();

        publicKey = Base64.encodeWebSafe(pbKey.getEncoded(), false);
        privateKey = Base64.encodeWebSafe(piKey.getEncoded(), false);

        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");

        cipher.init(Cipher.ENCRYPT_MODE, piKey);

        secretKeys = new ConcurrentHashMap<String, String>();
        String[] randomKeys = generateRandomWords(10);
        for (String key : randomKeys) {
            String cipherText = Base64.encodeWebSafe(cipher.doFinal(key.getBytes()), false);
            secretKeys.put(key, cipherText);
        }
    } catch (NoSuchAlgorithmException e) {
    } catch (InvalidKeyException e) {
    } catch (NoSuchPaddingException e) {
    } catch (IllegalBlockSizeException e) {
    } catch (BadPaddingException e) {
    }
}