0N/A/*
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2362N/A * by Oracle in the LICENSE file that accompanied this code.
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0N/A */
0N/A
0N/Apackage javax.crypto.spec;
0N/A
0N/Aimport java.math.BigInteger;
0N/Aimport java.security.spec.AlgorithmParameterSpec;
0N/Aimport java.security.spec.MGF1ParameterSpec;
0N/A
0N/A/**
0N/A * This class specifies the set of parameters used with OAEP Padding,
0N/A * as defined in the
0N/A * <a href="http://www.ietf.org/rfc/rfc3447.txt">PKCS #1</a>
0N/A * standard.
0N/A *
0N/A * Its ASN.1 definition in PKCS#1 standard is described below:
0N/A * <pre>
0N/A * RSAES-OAEP-params ::= SEQUENCE {
0N/A * hashAlgorithm [0] OAEP-PSSDigestAlgorithms DEFAULT sha1,
0N/A * maskGenAlgorithm [1] PKCS1MGFAlgorithms DEFAULT mgf1SHA1,
0N/A * pSourceAlgorithm [2] PKCS1PSourceAlgorithms DEFAULT pSpecifiedEmpty
0N/A * }
0N/A * </pre>
0N/A * where
0N/A * <pre>
0N/A * OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= {
0N/A * { OID id-sha1 PARAMETERS NULL }|
0N/A * { OID id-sha256 PARAMETERS NULL }|
0N/A * { OID id-sha384 PARAMETERS NULL }|
0N/A * { OID id-sha512 PARAMETERS NULL },
0N/A * ... -- Allows for future expansion --
0N/A * }
0N/A * PKCS1MGFAlgorithms ALGORITHM-IDENTIFIER ::= {
0N/A * { OID id-mgf1 PARAMETERS OAEP-PSSDigestAlgorithms },
0N/A * ... -- Allows for future expansion --
0N/A * }
0N/A * PKCS1PSourceAlgorithms ALGORITHM-IDENTIFIER ::= {
0N/A * { OID id-pSpecified PARAMETERS OCTET STRING },
0N/A * ... -- Allows for future expansion --
0N/A * }
0N/A * </pre>
0N/A * <p>Note: the OAEPParameterSpec.DEFAULT uses the following:
0N/A * message digest -- "SHA-1"
0N/A * mask generation function (mgf) -- "MGF1"
0N/A * parameters for mgf -- MGF1ParameterSpec.SHA1
0N/A * source of encoding input -- PSource.PSpecified.DEFAULT
0N/A *
0N/A * @see java.security.spec.MGF1ParameterSpec
0N/A * @see PSource
0N/A *
0N/A * @author Valerie Peng
0N/A *
0N/A * @since 1.5
0N/A */
0N/Apublic class OAEPParameterSpec implements AlgorithmParameterSpec {
0N/A
0N/A private String mdName = "SHA-1";
0N/A private String mgfName = "MGF1";
0N/A private AlgorithmParameterSpec mgfSpec = MGF1ParameterSpec.SHA1;
0N/A private PSource pSrc = PSource.PSpecified.DEFAULT;
0N/A
0N/A /**
0N/A * The OAEP parameter set with all default values.
0N/A */
0N/A public static final OAEPParameterSpec DEFAULT = new OAEPParameterSpec();
0N/A
0N/A /**
0N/A * Constructs a parameter set for OAEP padding as defined in
0N/A * the PKCS #1 standard using the default values.
0N/A */
0N/A private OAEPParameterSpec() {
0N/A }
0N/A
0N/A /**
0N/A * Constructs a parameter set for OAEP padding as defined in
0N/A * the PKCS #1 standard using the specified message digest
0N/A * algorithm <code>mdName</code>, mask generation function
0N/A * algorithm <code>mgfName</code>, parameters for the mask
0N/A * generation function <code>mgfSpec</code>, and source of
0N/A * the encoding input P <code>pSrc</code>.
0N/A *
0N/A * @param mdName the algorithm name for the message digest.
0N/A * @param mgfName the algorithm name for the mask generation
0N/A * function.
0N/A * @param mgfSpec the parameters for the mask generation function.
0N/A * If null is specified, null will be returned by getMGFParameters().
0N/A * @param pSrc the source of the encoding input P.
0N/A * @exception NullPointerException if <code>mdName</code>,
0N/A * <code>mgfName</code>, or <code>pSrc</code> is null.
0N/A */
0N/A public OAEPParameterSpec(String mdName, String mgfName,
0N/A AlgorithmParameterSpec mgfSpec,
0N/A PSource pSrc) {
0N/A if (mdName == null) {
0N/A throw new NullPointerException("digest algorithm is null");
0N/A }
0N/A if (mgfName == null) {
0N/A throw new NullPointerException("mask generation function " +
0N/A "algorithm is null");
0N/A }
0N/A if (pSrc == null) {
0N/A throw new NullPointerException("source of the encoding input " +
0N/A "is null");
0N/A }
0N/A this.mdName = mdName;
0N/A this.mgfName = mgfName;
0N/A this.mgfSpec = mgfSpec;
0N/A this.pSrc = pSrc;
0N/A }
0N/A
0N/A /**
0N/A * Returns the message digest algorithm name.
0N/A *
0N/A * @return the message digest algorithm name.
0N/A */
0N/A public String getDigestAlgorithm() {
0N/A return mdName;
0N/A }
0N/A
0N/A /**
0N/A * Returns the mask generation function algorithm name.
0N/A *
0N/A * @return the mask generation function algorithm name.
0N/A */
0N/A public String getMGFAlgorithm() {
0N/A return mgfName;
0N/A }
0N/A
0N/A /**
0N/A * Returns the parameters for the mask generation function.
0N/A *
0N/A * @return the parameters for the mask generation function.
0N/A */
0N/A public AlgorithmParameterSpec getMGFParameters() {
0N/A return mgfSpec;
0N/A }
0N/A
0N/A /**
0N/A * Returns the source of encoding input P.
0N/A *
0N/A * @return the source of encoding input P.
0N/A */
0N/A public PSource getPSource() {
0N/A return pSrc;
0N/A }
0N/A}