51     static final long serialVersionUID = 7647557958927458271L;
  52 
  53     // the public key
  54     private BigInteger y;
  55 
  56     // the key bytes, without the algorithm information
  57     private byte[] key;
  58 
  59     // the encoded key
  60     private byte[] encodedKey;
  61 
  62     // the prime modulus
  63     private BigInteger p;
  64 
  65     // the base generator
  66     private BigInteger g;
  67 
  68     // the private-value length (optional)
  69     private int l;
  70 
  71     private int DH_data[] = { 1, 2, 840, 113549, 1, 3, 1 };
  72 
  73     /**
  74      * Make a DH public key out of a public value <code>y</code>, a prime
  75      * modulus <code>p</code>, and a base generator <code>g</code>.
  76      *
  77      * @param y the public value
  78      * @param p the prime modulus
  79      * @param g the base generator
  80      *
  81      * @exception InvalidKeyException if the key cannot be encoded
  82      */
  83     DHPublicKey(BigInteger y, BigInteger p, BigInteger g)
  84         throws InvalidKeyException {
  85         this(y, p, g, 0);
  86     }
  87 
  88     /**
  89      * Make a DH public key out of a public value <code>y</code>, a prime
  90      * modulus <code>p</code>, a base generator <code>g</code>, and a
  91      * private-value length <code>l</code>.

  51     static final long serialVersionUID = 7647557958927458271L;
  52 
  53     // the public key
  54     private BigInteger y;
  55 
  56     // the key bytes, without the algorithm information
  57     private byte[] key;
  58 
  59     // the encoded key
  60     private byte[] encodedKey;
  61 
  62     // the prime modulus
  63     private BigInteger p;
  64 
  65     // the base generator
  66     private BigInteger g;
  67 
  68     // the private-value length (optional)
  69     private int l;
  70 
  71     private int[] DH_data = { 1, 2, 840, 113549, 1, 3, 1 };
  72 
  73     /**
  74      * Make a DH public key out of a public value <code>y</code>, a prime
  75      * modulus <code>p</code>, and a base generator <code>g</code>.
  76      *
  77      * @param y the public value
  78      * @param p the prime modulus
  79      * @param g the base generator
  80      *
  81      * @exception InvalidKeyException if the key cannot be encoded
  82      */
  83     DHPublicKey(BigInteger y, BigInteger p, BigInteger g)
  84         throws InvalidKeyException {
  85         this(y, p, g, 0);
  86     }
  87 
  88     /**
  89      * Make a DH public key out of a public value <code>y</code>, a prime
  90      * modulus <code>p</code>, a base generator <code>g</code>, and a
  91      * private-value length <code>l</code>.