83TsGAc6

1public class KeyService {
2  
3  private final KeyRepository keyRepository;
4  
5  public void generateSymmetric(String alias) {
6    KeyGenerator generator = KeyGenerator.getInstance("AES");
7    generator.init(256);
8    this.keyRepository.store(alias, generator.generateKey());    
9  }
10  
11  public SecretKey exportSymmetric(String alias) {
12    return this.keyRepository.load(alias);
13  }
14  
15  public void generateAsymmetric(String alias) {
16    KeyGenerator generator = KeyGenerator.getInstance("RSA");
17    generator.init(2048);
18    this.keyRepository.store(alias, generator.generateKeyPair());    
19  }
20  
21  public KeyPair exportAsymmetric(String alias) { 
22    PrivateKey privateKey = this.keyRepository.load(alias);
23    KeyFactory factory KeyFactory.getInstance("RSA");
24    RSAPrivateCrtKeySpec privateSpec = factory.getKeySpec(privateKey, RSAPrivateCrtKeySpec.class);
25    PublicKey publicKey = factory.generatePublic(new RSAPublicKeySpec(privateSpec.getModulus(), privateSpec.getPublicExponent()));
26    return new KeyPair(publicKey, privateKey);
27  }
28}