如何從該方法

Question

密鑰生成方法

public static String generateKeys(String keyAlgorithm, int numBits) { 

    try { 
     // Get the public/private key pair 
     KeyPairGenerator keyGen = KeyPairGenerator.getInstance(keyAlgorithm); 
     keyGen.initialize(numBits); 
     KeyPair keyPair = keyGen.genKeyPair(); 
     PrivateKey privateKey = keyPair.getPrivate(); 
     PublicKey publicKey = keyPair.getPublic(); 

     System.out.println("\n" + "Generating key/value pair using " + privateKey.getAlgorithm() + " algorithm"); 

     // Get the bytes of the public and private keys 
     byte[] privateKeyBytes = privateKey.getEncoded(); 
     byte[] publicKeyBytes = publicKey.getEncoded(); 

     // Get the formats of the encoded bytes 
     String formatPrivate = privateKey.getFormat(); // PKCS#8 
     String formatPublic = publicKey.getFormat(); // X.509 

     String pv=String.valueOf(privateKeyBytes); 

     System.out.println("Private Key : " + Base64.encode(pv)); 

     String pb=String.valueOf(publicKeyBytes); 
     System.out.println("Public Key : " + Base64.encode(pb)); 
      // return pb; 

      // System.out.println("Private Key : " + Base64.encode(String.valueOf(privateKeyBytes))); 
      // System.out.println("Public Key : " + Base64.encode(String.valueOf(publicKeyBytes))); 

     // The bytes can be converted back to public and private key objects 
     KeyFactory keyFactory = KeyFactory.getInstance(keyAlgorithm); 
     EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(privateKeyBytes); 
     PrivateKey privateKey2 = keyFactory.generatePrivate(privateKeySpec); 

     EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(publicKeyBytes); 
     PublicKey publicKey2 = keyFactory.generatePublic(publicKeySpec); 

     // The original and new keys are the same 
      // System.out.println(" Are both private keys equal? " + privateKey.equals(privateKey2)); 
      // System.out.println(" Are both public keys equal? " + publicKey.equals(publicKey2)); 
    } catch (InvalidKeySpecException specException) { 
     System.out.println("Exception"); 
     System.out.println("Invalid Key Spec Exception"); 
    } catch (NoSuchAlgorithmException e) { 
     System.out.println("Exception"); 
     System.out.println("No such algorithm: " + keyAlgorithm); 
    } 
     return null; 
    } 
} 

這裏獲得公共密鑰的唯一的價值就是我的密鑰生成代碼 我想從上面的方法獲得公共密鑰的唯一的價值，並將其發送使用序列化到服務器。

String pb=String.valueOf(publicKeyBytes); 
System.out.println("Public Key : " + Base64.encode(pb)); 

但我的方法顯示空 我如何可以存儲通過密鑰存儲庫或任何其他方法在文件中的公鑰/私鑰

Answer 1

您應該能夠通過運行來獲得公共密鑰字符串以下：

System.out.println（new String（java.util.Base64.getEncoder（）。encode（publicKeyBytes）））;