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114 lines
2.8 KiB
114 lines
2.8 KiB
/*
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* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.security.spec;
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import java.security.spec.AlgorithmParameterSpec;
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/**
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* This class specifies the set of parameters used with mask generation
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* function MGF1 in OAEP Padding and RSA-PSS signature scheme, as
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* defined in the
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* <a href="http://www.ietf.org/rfc/rfc3447.txt">PKCS #1 v2.1</a>
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* standard.
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*
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* <p>Its ASN.1 definition in PKCS#1 standard is described below:
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* <pre>
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* MGF1Parameters ::= OAEP-PSSDigestAlgorthms
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* </pre>
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* where
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* <pre>
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* OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= {
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* { OID id-sha1 PARAMETERS NULL }|
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* { OID id-sha224 PARAMETERS NULL }|
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* { OID id-sha256 PARAMETERS NULL }|
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* { OID id-sha384 PARAMETERS NULL }|
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* { OID id-sha512 PARAMETERS NULL },
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* ... -- Allows for future expansion --
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* }
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* </pre>
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* @see PSSParameterSpec
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* @see javax.crypto.spec.OAEPParameterSpec
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*
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* @author Valerie Peng
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*
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* @since 1.5
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*/
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public class MGF1ParameterSpec implements AlgorithmParameterSpec {
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/**
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* The MGF1ParameterSpec which uses "SHA-1" message digest.
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*/
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public static final MGF1ParameterSpec SHA1 =
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new MGF1ParameterSpec("SHA-1");
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/**
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* The MGF1ParameterSpec which uses "SHA-224" message digest.
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*/
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public static final MGF1ParameterSpec SHA224 =
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new MGF1ParameterSpec("SHA-224");
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/**
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* The MGF1ParameterSpec which uses "SHA-256" message digest.
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*/
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public static final MGF1ParameterSpec SHA256 =
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new MGF1ParameterSpec("SHA-256");
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/**
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* The MGF1ParameterSpec which uses "SHA-384" message digest.
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*/
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public static final MGF1ParameterSpec SHA384 =
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new MGF1ParameterSpec("SHA-384");
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/**
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* The MGF1ParameterSpec which uses SHA-512 message digest.
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*/
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public static final MGF1ParameterSpec SHA512 =
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new MGF1ParameterSpec("SHA-512");
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private String mdName;
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/**
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* Constructs a parameter set for mask generation function MGF1
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* as defined in the PKCS #1 standard.
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*
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* @param mdName the algorithm name for the message digest
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* used in this mask generation function MGF1.
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* @exception NullPointerException if {@code mdName} is null.
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*/
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public MGF1ParameterSpec(String mdName) {
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if (mdName == null) {
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throw new NullPointerException("digest algorithm is null");
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}
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this.mdName = mdName;
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}
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/**
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* Returns the algorithm name of the message digest used by the mask
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* generation function.
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*
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* @return the algorithm name of the message digest.
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*/
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public String getDigestAlgorithm() {
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return mdName;
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}
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}
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