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  1. JDK
  2. JDK-4953553

RuntimeException for javax.crypto.Cipher.init(int, Key) for algorithm PBEWITHMD5

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: 5.0
    • Fix Version/s: 5.0
    • Component/s: security-libs
    • Labels:
    • Subcomponent:
    • Resolved In Build:
      b31
    • CPU:
      sparc
    • OS:
      solaris_2.6
    • Verification:
      Verified

      Description



      Name: iiR10263 Date: 11/13/2003



      The specification describes the following exceptions that are thrown
      by javax.crypto.Cipher.init(int, Key):

      Throws:
      InvalidKeyException - if the given key is inappropriate for
      initializing this cipher, or if this cipher is being initialized for
      decryption and requires algorithm parameters that cannot be determined
      from the given key, or if the given key has a keysize that exceeds the
      maximum allowable keysize (as determined from the configured
      jurisdiction policy files).

      Unfortunately current implementation throws RuntimeException when
      init(Cipher.DECRYPT_MODE, (Key)...)
      is called without parameters for Cipher objects of
      the PBEWITHMD5ANDDES algorithm.

      Please find the code example that reproduses the situation and exception stack
      trace below:

      import java.io.PrintWriter;
      import java.security.InvalidKeyException;
      import java.security.Key;
      import java.security.AlgorithmParameters;
      import java.security.spec.KeySpec;
      import javax.crypto.Cipher;
      import javax.crypto.SecretKeyFactory;
      import javax.crypto.spec.PBEKeySpec;

      public class e3 {
       
          public static void main(String argv[]) {
              Key k;
              Cipher c;
              AlgorithmParameters params = null;
              
              String alg = "PBEWITHMD5ANDDES";
              byte[] salt = {
                  (byte)0xc7, (byte)0x73, (byte)0x21, (byte)0x8c,
                  (byte)0x7e, (byte)0xc8, (byte)0xee, (byte)0x99
              };
              int count = 20;
              String s = "My wonderfull password that is long enough. Tra-la-la, let me sing a song";
              
              try {
                  int kl = Cipher.getMaxAllowedKeyLength(alg) / 8;
                  String p = (kl >= s.length()) ? s: s.substring(0, kl);
                  KeySpec ks = new PBEKeySpec(p.toCharArray(), salt, count, kl * 8);
              
                  SecretKeyFactory skf =
                      SecretKeyFactory.getInstance(alg);
           
                  // PBE algorithm is symmetric.
                  k = skf.generateSecret(ks);

                  c = Cipher.getInstance(alg);
                  
                  c.init(Cipher.ENCRYPT_MODE, k);
                  
                  params = c.getParameters();
                  
                  c.init(Cipher.DECRYPT_MODE, k/*, params*/);

                  System.out.println("passed");
              } catch (Exception e) {
                  e.printStackTrace(System.out);
              }
          }
      }

      java.lang.RuntimeException: Parameters missing
              at com.sun.crypto.provider.PBEWithMD5AndDESCipher.engineInit(DashoA6275)
              at javax.crypto.Cipher.init(DashoA6275)
              at javax.crypto.Cipher.init(DashoA6275)
              at e3.main(e3.java:42)

      Note that all works correct ("passed" appears) if we supply parameters by uncommenting /* , params */.

      java full version "1.5.0-beta-b26"

      ======================================================================

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            • Assignee:
              valeriep Valerie Peng
              Reporter:
              duke J. Duke (Inactive)
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