Examples of ECFieldF2m

java.security.spec.ECFieldF2m
This immutable class defines an elliptic curve (EC) characteristic 2 finite field. @see ECField @author Valerie Peng @version 1.4, 11/17/05 @since 1.5

Examples of java.security.spec.ECFieldF2m

     * Test for <code>getM()</code> method.<br>
     *
     * Assertion: returns m value for <code>ECFieldF2m</code>
     */
    public final void testGetM() {
        assertEquals(2000, new ECFieldF2m(2000).getM());
    }

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Examples of java.security.spec.ECFieldF2m

     *
     * Assertion: returns mid terms of reduction polynomial
     */
    public final void testGetMidTermsOfReductionPolynomial01() {
        int[] a = new int[] {981,2,1};
        int[] b = new ECFieldF2m(2000,
                BigInteger.valueOf(0L).setBit(0).setBit(1).
                setBit(2).setBit(981).setBit(2000)).
                getMidTermsOfReductionPolynomial();
        assertTrue(Arrays.equals(a, b));
    }

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Examples of java.security.spec.ECFieldF2m

     * Test #2 for <code>getMidTermsOfReductionPolynomial()</code> method.<br>
     *
     * Assertion: returns null for normal basis
     */
    public final void testGetMidTermsOfReductionPolynomial02() {
        assertNull(new ECFieldF2m(2000).getMidTermsOfReductionPolynomial());
    }

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Examples of java.security.spec.ECFieldF2m

     *
     * Assertion: returns mid terms of reduction polynomial
     */
    public final void testGetMidTermsOfReductionPolynomial03() {
        int[] a = new int[] {367};
        int[] b = new ECFieldF2m(1999, a).getMidTermsOfReductionPolynomial();
        assertTrue(Arrays.equals(a, b));
    }

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Examples of java.security.spec.ECFieldF2m

     * Assertion: returns reduction polynomial
     */
    public final void testGetReductionPolynomial01() {
        BigInteger rp = BigInteger.valueOf(0L).setBit(0).setBit(1).setBit(2).
        setBit(981).setBit(2000);
        assertTrue(new ECFieldF2m(2000, rp).getReductionPolynomial().equals(rp));
    }

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Examples of java.security.spec.ECFieldF2m

     * Test #2 for <code>getReductionPolynomial()</code> method.<br>
     *
     * Assertion: returns null for normal basis
     */
    public final void testGetReductionPolynomial02() {
        assertNull(new ECFieldF2m(2000).getReductionPolynomial());
    }

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Examples of java.security.spec.ECFieldF2m

        // reference array
        int[] a = new int[] {367};
        // reference array copy
        int[] aCopy = a.clone();
        // create obj using copy
        ECFieldF2m f = new ECFieldF2m(1999, aCopy);
        // modify copy
        aCopy[0] = 5;
        // compare reference with returned array
        assertTrue(Arrays.equals(a, f.getMidTermsOfReductionPolynomial()));        
    }

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Examples of java.security.spec.ECFieldF2m

        // reference array
        int[] a = new int[] {981,2,1};
        // reference array copy
        int[] aCopy = a.clone();
        // create obj using copy
        ECFieldF2m f = new ECFieldF2m(2000, aCopy);
        // get array reference and modify returned array
        f.getMidTermsOfReductionPolynomial()[0] = 1532;
        // compare reference with returned for the second time array
        assertTrue(Arrays.equals(a, f.getMidTermsOfReductionPolynomial()));        
    }

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Examples of java.security.spec.ECFieldF2m

    public final void testECFieldF2mintintArray() {
        for(int i=0; i<intIntArrayCtorTestParameters.length; i++) {
            ECFieldF2mDomainParams tp = intIntArrayCtorTestParameters[i];
            try {
                // perform test
                new ECFieldF2m(tp.m, tp.ks);
                
                if (tp.x != null) {
                    // exception has been expected 
                    fail(getName() + ", set " + i +
                            " FAILED: expected exception has not been thrown");

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Examples of java.security.spec.ECFieldF2m

     *
     * Assertion: must return the same value if invoked
     * repeatedly on the same object. 
     */
    public final void testHashCode01() {
        ECFieldF2m f = new ECFieldF2m(2000);
        int hc = f.hashCode();
        assertTrue(hc == f.hashCode() &&
                   hc == f.hashCode() &&
                   hc == f.hashCode() &&
                   hc == f.hashCode() &&
                   hc == f.hashCode() &&
                   hc == f.hashCode() &&
                   hc == f.hashCode() &&
                   hc == f.hashCode());
    }

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