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Thread: java.io.StreamCorruptedException: invalid stream header

  1. #1
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    Default java.io.StreamCorruptedException: invalid stream header

    Hello,

    I am trying to encrypt a message using RSA algo but getting the following error:

    java.io.StreamCorruptedException: invalid stream header
    at java.io.ObjectInputStream.readStreamHeader(ObjectI nputStream.java:753)
    at java.io.ObjectInputStream.<init>(ObjectInputStream .java:268)

                 public static final String PUBLIC_KEY_FILE = "C:/TXT.key";
     
                 final String originalText = "Text to be encrypted ";
    	      ObjectInputStream inputStream = null;
    	      FileInputStream f=  new FileInputStream(PUBLIC_KEY_FILE);
    	      //  getting error on the below line
    	      inputStream = new ObjectInputStream(f);      
                  final PublicKey publicKey = (PublicKey) inputStream.readObject();
    	      final byte[] cipherText = encrypt(originalText, publicKey);


    Please guide.

    Thanks


  2. #2
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    Default Re: java.io.StreamCorruptedException: invalid stream header

    Can you post a small, complete program that compiles, executes and shows the problem.
    Also post the compete text of the error message.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: java.io.StreamCorruptedException: invalid stream header

    package in.javadigest.encryption;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.ObjectInputStream;
    import java.io.ObjectOutputStream;
    import java.security.KeyPair;
    import java.security.KeyPairGenerator;
    import java.security.NoSuchAlgorithmException;
    import java.security.PrivateKey;
    import java.security.PublicKey;
    import java.security.Key;
     
     
    import javax.crypto.Cipher;
     
    public class EncryptionUtil {
     
    	  /**
    	   * String to hold name of the encryption algorithm.
    	   */
    	  public static final String ALGORITHM = "RSA";
     
    	  /**
    	   * String to hold the name of the private key file.
    	   */
    	  public static final String PRIVATE_KEY_FILE = "C:/TXT2.key";
     
    	  /**
    	   * String to hold name of the public key file.
    	   */
    	  public static final String PUBLIC_KEY_FILE = "C:/TXT.key";
     
    	  /**
    	   * Generate key which contains a pair of private and public key using 1024
    	   * bytes. Store the set of keys in Prvate.key and Public.key files.
    	   * 
    	   * @throws NoSuchAlgorithmException
    	   * @throws IOException
    	   * @throws FileNotFoundException
    	   */
    	  public static void generateKey() {
    	    try {
    	      final KeyPairGenerator keyGen = KeyPairGenerator.getInstance(ALGORITHM);
    	      keyGen.initialize(1024);
    	      final KeyPair key = keyGen.generateKeyPair();
     
    	      File privateKeyFile = new File(PRIVATE_KEY_FILE);
    	      File publicKeyFile = new File(PUBLIC_KEY_FILE);
     
    	      // Create files to store public and private key
    	      if (privateKeyFile.getParentFile() != null) {
    	        privateKeyFile.getParentFile().mkdirs();
    	      }
    	      privateKeyFile.createNewFile();
     
    	      if (publicKeyFile.getParentFile() != null) {
    	        publicKeyFile.getParentFile().mkdirs();
    	      }
    	      publicKeyFile.createNewFile();
     
    	      // Saving the Public key in a file
    	      ObjectOutputStream publicKeyOS = new ObjectOutputStream(
    	          new FileOutputStream(publicKeyFile));
    	      publicKeyOS.writeObject(key.getPublic());
    	      publicKeyOS.close();
     
    	      // Saving the Private key in a file
    	      ObjectOutputStream privateKeyOS = new ObjectOutputStream(
    	          new FileOutputStream(privateKeyFile));
    	      privateKeyOS.writeObject(key.getPrivate());
    	      privateKeyOS.close();
    	    } catch (Exception e) {
    	      e.printStackTrace();
    	    }
     
    	  }
     
    	  /**
    	   * The method checks if the pair of public and private key has been generated.
    	   * 
    	   * @return flag indicating if the pair of keys were generated.
    	   */
    	  public static boolean areKeysPresent() {
     
    	    File privateKey = new File(PRIVATE_KEY_FILE);
    	    File publicKey = new File(PUBLIC_KEY_FILE);
     
    	    if (privateKey.exists() && publicKey.exists()) {
    	      return true;
    	    }
    	    return false;
    	  }
     
    	  /**
    	   * Encrypt the plain text using public key.
    	   * 
    	   * @param text
    	   *          : original plain text
    	   * @param key
    	   *          :The public key
    	   * @return Encrypted text
    	   * @throws java.lang.Exception
    	   */
    	  public static byte[] encrypt(String text, PublicKey key) {
    	    byte[] cipherText = null;
    	    try {
    	      // get an RSA cipher object and print the provider
    	      final Cipher cipher = Cipher.getInstance(ALGORITHM);
    	      // encrypt the plain text using the public key
    	      cipher.init(Cipher.ENCRYPT_MODE, key);
    	      cipherText = cipher.doFinal(text.getBytes());
    	    } catch (Exception e) {
    	      e.printStackTrace();
    	    }
    	    return cipherText;
    	  }
     
    	  /**
    	   * Decrypt text using private key.
    	   * 
    	   * @param text
    	   *          :encrypted text
    	   * @param key
    	   *          :The private key
    	   * @return plain text
    	   * @throws java.lang.Exception
    	   */
    	  public static String decrypt(byte[] text, PrivateKey key) {
    	    byte[] dectyptedText = null;
    	    try {
    	      // get an RSA cipher object and print the provider
    	      final Cipher cipher = Cipher.getInstance(ALGORITHM);
     
    	      // decrypt the text using the private key
    	      cipher.init(Cipher.DECRYPT_MODE, key);
    	      dectyptedText = cipher.doFinal(text);
     
    	    } catch (Exception ex) {
    	      ex.printStackTrace();
    	    }
     
    	    return new String(dectyptedText);
    	  }
     
     
     
     
    	  /**
    	   * Test the EncryptionUtil
    	   */
    	  public static void main(String[] args) {
     
    	    try {
     
    	      // Check if the pair of keys are present else generate those.
    	      if (!areKeysPresent()) {
    	        // Method generates a pair of keys using the RSA algorithm and stores it
    	        // in their respective files
    	        generateKey();
    	      }
     
    	      final String originalText = "Text to be encrypted ";
    	      ObjectInputStream inputStream = null;
    	   FileInputStream f=  new FileInputStream(PUBLIC_KEY_FILE);
    	      // Encrypt the string using the public key
    	      inputStream = new ObjectInputStream(f);
    	      final PublicKey publicKey = (PublicKey) inputStream.readObject();
    	      final byte[] cipherText = encrypt(originalText, publicKey);
     
     
    	      // Decrypt the cipher text using the private key.
    	      inputStream = new ObjectInputStream(new FileInputStream(PRIVATE_KEY_FILE));
    	      final PrivateKey privateKey = (PrivateKey) inputStream.readObject();
    	      final String plainText = decrypt(cipherText, privateKey);
     
    	      // Printing the Original, Encrypted and Decrypted Text
    	      System.out.println("Original Text: " + originalText);
    	      System.out.println("Encrypted Text: " +cipherText.toString());
    	      System.out.println("Decrypted Text: " + plainText);
     
    	    } catch (Exception e) {
    	      e.printStackTrace();
    	    }
    	  }
    	}

    Error:java.io.StreamCorruptedException: invalid stream header
    at java.io.ObjectInputStream.readStreamHeader(ObjectI nputStream.java:753)
    at java.io.ObjectInputStream.<init>(ObjectInputStream .java:268)
    at in.javadigest.encryption.EncryptionUtil.main(Encry ptionUtil.java:172)
    Last edited by MHZ; July 10th, 2014 at 08:19 AM. Reason: code tag

  4. #4
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    Default Re: java.io.StreamCorruptedException: invalid stream header

    The code works for me:
    Running: java -client -cp . EncryptionUtil

    Original Text: Text to be encrypted
    Encrypted Text: [B@15696b7 <<<<<<<<<<<< Use Arrays.toString() here
    Decrypted Text: Text to be encrypted

    0 error(s)
    If you don't understand my answer, don't ignore it, ask a question.

  5. #5
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    Default Re: java.io.StreamCorruptedException: invalid stream header

    Strange. Then why its not working for me? I am using Myeclipse tool.

  6. #6
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    Default Re: java.io.StreamCorruptedException: invalid stream header

    I use an enhanced editor that uses the command line.
    If you don't understand my answer, don't ignore it, ask a question.

  7. #7
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    Default Re: java.io.StreamCorruptedException: invalid stream header

    Thanks.
    It worked out when I run it through command prompt.
    Can you help me if I want to encrypt and decrypt by using fixed keys?

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    Default Re: java.io.StreamCorruptedException: invalid stream header

    There's nothing wrong with the code you posted. What help do you need?

  9. #9
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    Default Re: java.io.StreamCorruptedException: invalid stream header

    Please convert the following C# code to Java code.

    StreamReader reader = new StreamReader(filename);
    String modulus64 = reader.ReadLine();
    String exponent64 = reader.ReadLine();

    Thanks

  10. #10
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    Default Re: java.io.StreamCorruptedException: invalid stream header

    We'll get right on that.

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