| /* |
| * Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.security.spec; |
| |
| import java.security.spec.AlgorithmParameterSpec; |
| |
| /** |
| * This class specifies the set of parameters used with mask generation |
| * function MGF1 in OAEP Padding and RSA-PSS signature scheme, as |
| * defined in the |
| * <a href="http://www.ietf.org/rfc/rfc3447.txt">PKCS #1 v2.1</a> |
| * standard. |
| * |
| * <p>Its ASN.1 definition in PKCS#1 standard is described below: |
| * <pre> |
| * MGF1Parameters ::= OAEP-PSSDigestAlgorthms |
| * </pre> |
| * where |
| * <pre> |
| * 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 -- |
| * } |
| * </pre> |
| * @see PSSParameterSpec |
| * @see javax.crypto.spec.OAEPParameterSpec |
| * |
| * @author Valerie Peng |
| * |
| * @since 1.5 |
| */ |
| public class MGF1ParameterSpec implements AlgorithmParameterSpec { |
| |
| /** |
| * The MGF1ParameterSpec which uses "SHA-1" message digest. |
| */ |
| public static final MGF1ParameterSpec SHA1 = |
| new MGF1ParameterSpec("SHA-1"); |
| /** |
| * The MGF1ParameterSpec which uses "SHA-256" message digest. |
| */ |
| public static final MGF1ParameterSpec SHA256 = |
| new MGF1ParameterSpec("SHA-256"); |
| /** |
| * The MGF1ParameterSpec which uses "SHA-384" message digest. |
| */ |
| public static final MGF1ParameterSpec SHA384 = |
| new MGF1ParameterSpec("SHA-384"); |
| /** |
| * The MGF1ParameterSpec which uses SHA-512 message digest. |
| */ |
| public static final MGF1ParameterSpec SHA512 = |
| new MGF1ParameterSpec("SHA-512"); |
| |
| private String mdName; |
| |
| /** |
| * Constructs a parameter set for mask generation function MGF1 |
| * as defined in the PKCS #1 standard. |
| * |
| * @param mdName the algorithm name for the message digest |
| * used in this mask generation function MGF1. |
| * @exception NullPointerException if <code>mdName</code> is null. |
| */ |
| public MGF1ParameterSpec(String mdName) { |
| if (mdName == null) { |
| throw new NullPointerException("digest algorithm is null"); |
| } |
| this.mdName = mdName; |
| } |
| |
| /** |
| * Returns the algorithm name of the message digest used by the mask |
| * generation function. |
| * |
| * @return the algorithm name of the message digest. |
| */ |
| public String getDigestAlgorithm() { |
| return mdName; |
| } |
| } |