Cross Reference: /libcore/ojluni/src/main/java/javax/crypto/spec/DESKeySpec.java

Lines Matching refs:key
31  * This class specifies a DES key.
40      * The constant which defines the length of a DES key in bytes.
44     private byte[] key;
50      * each is both a key and a dual giving 12 keys with duals. The last
117      * <code>key</code> as the key material for the DES key.
119      * <p> The bytes that constitute the DES key are those between
120      * <code>key[0]</code> and <code>key[7]</code> inclusive.
122      * @param key the buffer with the DES key material. The first 8 bytes
125      * @exception NullPointerException if the given key material is
127      * @exception InvalidKeyException if the given key material is shorter
130     public DESKeySpec(byte[] key) throws InvalidKeyException {
131         this(key, 0);
136      * <code>key</code>, beginning at <code>offset</code> inclusive,
137      * as the key material for the DES key.
139      * <p> The bytes that constitute the DES key are those between
140      * <code>key[offset]</code> and <code>key[offset+7]</code> inclusive.
142      * @param key the buffer with the DES key material. The first 8 bytes
145      * @param offset the offset in <code>key</code>, where the DES key
148      * @exception NullPointerException if the given key material is
150      * @exception InvalidKeyException if the given key material, starting at
153     public DESKeySpec(byte[] key, int offset) throws InvalidKeyException {
154         if (key.length - offset < DES_KEY_LEN) {
155             throw new InvalidKeyException("Wrong key size");
157         this.key = new byte[DES_KEY_LEN];
158         System.arraycopy(key, offset, this.key, 0, DES_KEY_LEN);
162      * Returns the DES key material.
164      * @return the DES key material. Returns a new array
168         return (byte[])this.key.clone();
172      * Checks if the given DES key material, starting at <code>offset</code>
175      * @param key the buffer with the DES key material.
176      * @param offset the offset in <code>key</code>, where the DES key
179      * @return true if the given DES key material is parity-adjusted, false
182      * @exception InvalidKeyException if the given key material is
186     public static boolean isParityAdjusted(byte[] key, int offset)
188             if (key == null) {
189                 throw new InvalidKeyException("null key");
191             if (key.length - offset < DES_KEY_LEN) {
192                 throw new InvalidKeyException("Wrong key size");
196                 int k = Integer.bitCount(key[offset++] & 0xff);
206      * Checks if the given DES key material is weak or semi-weak.
208      * @param key the buffer with the DES key material.
209      * @param offset the offset in <code>key</code>, where the DES key
212      * @return true if the given DES key material is weak or semi-weak, false
215      * @exception InvalidKeyException if the given key material is
219     public static boolean isWeak(byte[] key, int offset)
221         if (key == null) {
222             throw new InvalidKeyException("null key");
224         if (key.length - offset < DES_KEY_LEN) {
225             throw new InvalidKeyException("Wrong key size");
230                 if (WEAK_KEYS[i][j] != key[j+offset]) {