Examples of java.security.spec.PSSParameterSpec

java.security.spec.PSSParameterSpec

etf.org/rfc/rfc3447.txt">PKCS#1 v2.1 standard.

Its ASN.1 definition in PKCS#1 standard is described below:

 RSASSA-PSS-params ::= SEQUENCE { hashAlgorithm      [0] OAEP-PSSDigestAlgorithms  DEFAULT sha1, maskGenAlgorithm   [1] PKCS1MGFAlgorithms  DEFAULT mgf1SHA1, saltLength         [2] INTEGER  DEFAULT 20, trailerField       [3] INTEGER  DEFAULT 1 }

where

 OAEP-PSSDigestAlgorithms    ALGORITHM-IDENTIFIER ::= { { OID id-sha1 PARAMETERS NULL   }| { OID id-sha256 PARAMETERS NULL }| { OID id-sha384 PARAMETERS NULL }| { OID id-sha512 PARAMETERS NULL }, ...  -- Allows for future expansion -- } PKCS1MGFAlgorithms    ALGORITHM-IDENTIFIER ::= { { OID id-mgf1 PARAMETERS OAEP-PSSDigestAlgorithms }, ...  -- Allows for future expansion -- }

Note: the PSSParameterSpec.DEFAULT uses the following: message digest -- "SHA-1" mask generation function (mgf) -- "MGF1" parameters for mgf -- MGF1ParameterSpec.SHA1 SaltLength -- 20 TrailerField -- 1 @see MGF1ParameterSpec @see AlgorithmParameterSpec @see java.security.Signature @author Valerie Peng @version 1.9 06/07/20 @since 1.4

    
            try
            {
                RSASSAPSSparams pssP = new RSASSAPSSparams((ASN1Sequence)aIn.readObject());
    
                currentSpec = new PSSParameterSpec(
                                       pssP.getHashAlgorithm().getObjectId().getId(), 
                                       pssP.getMaskGenAlgorithm().getObjectId().getId(), 
                                       new MGF1ParameterSpec(AlgorithmIdentifier.getInstance(pssP.getMaskGenAlgorithm().getParameters()).getObjectId().getId()),
                                       pssP.getSaltLength().getValue().intValue(),
                                       pssP.getTrailerField().getValue().intValue());

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     * Test #1 for <code>PSSParameterSpec(int)</code> ctor<br>
     * Assertion: constructs using valid parameter
     * <code>PSSParameterSpec<code> object
     */
    public final void testPSSParameterSpec0101() {
        AlgorithmParameterSpec aps = new PSSParameterSpec(20);
        assertTrue(aps instanceof PSSParameterSpec);
    }

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     * throws <code>IllegalArgumentException</code>
     * if <code>saltLen</code> less than 0
     */
    public final void testPSSParameterSpec0102() {
        try {
            new PSSParameterSpec(-1);
            fail("Expected IAE not thrown");
        } catch (IllegalArgumentException e) {
        }
    }

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     * </code> ctor<br>
     * Assertion: constructs using valid parameters
     * <code>PSSParameterSpec<code> object
     */
    public final void testPSSParameterSpec0201() {
        AlgorithmParameterSpec aps = new PSSParameterSpec("SHA-1", "MGF1",
                MGF1ParameterSpec.SHA1, 20, 1);
        assertTrue(aps instanceof PSSParameterSpec);
    }

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     * throws <code>NullPointerException</code>
     * if <code>mdName</code> is null
     */
    public final void testPSSParameterSpec0202() {
        try {
            new PSSParameterSpec(null, "MGF1", MGF1ParameterSpec.SHA1, 20, 1);
            fail("Expected NPE not thrown");
        } catch (NullPointerException e) {
        }
    }

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     * throws <code>NullPointerException</code>
     * if <code>mgfName</code> is null
     */
    public final void testPSSParameterSpec0203() {
        try {
            new PSSParameterSpec("SHA-1", null, MGF1ParameterSpec.SHA1, 20, 1);
            fail("Expected NPE not thrown");
        } catch (NullPointerException e) {
        }
    }

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     * throws <code>IllegalArgumentException<code>
     * if <code>saltLen<code> less than 0
     */
    public final void testPSSParameterSpec0204() {
        try {
            new PSSParameterSpec("SHA-1", "MGF1",
                    MGF1ParameterSpec.SHA1, -20, 1);
            fail("Expected IAE not thrown");
        } catch (IllegalArgumentException e) {
        }
    }

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     * throws <code>IllegalArgumentException</code>
     * if <code>trailerField</code> less than 0
     */
    public final void testPSSParameterSpec0205() {
        try {
            new PSSParameterSpec("SHA-1", "MGF1",
                    MGF1ParameterSpec.SHA1, 20, -1);
            fail("Expected IAE not thrown");
        } catch (IllegalArgumentException e) {
        }
    }

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     * </code> ctor<br>
     * Assertion: <code>AlgorithmParameterSpec</code> can be null
     * 
     */
    public final void testPSSParameterSpec0206() {
        new PSSParameterSpec("SHA-1", "MGF1", null, 20, 1);
    }

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    /**
     * Test for <code>getDigestAlgorithm()</code> method
     * Assertion: returns message digest algorithm name 
     */
    public final void testGetDigestAlgorithm() {
        PSSParameterSpec pssps = new PSSParameterSpec("SHA-1", "MGF1",
                MGF1ParameterSpec.SHA1, 20, 1);
        assertEquals("SHA-1", pssps.getDigestAlgorithm());
    }

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