76 lines
3.1 KiB
Java
76 lines
3.1 KiB
Java
// SPDX-FileCopyrightText: 2021 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package org.pgpainless.signature.subpackets;
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import java.util.Date;
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import javax.annotation.Nonnull;
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import org.bouncycastle.bcpg.SignatureSubpacket;
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import org.bouncycastle.bcpg.SignatureSubpacketTags;
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import org.bouncycastle.openpgp.PGPSignatureSubpacketGenerator;
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/**
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* Utility class that helps to deal with BCs SignatureSubpacketGenerator class.
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*/
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public final class SignatureSubpacketGeneratorUtil {
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private SignatureSubpacketGeneratorUtil() {
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}
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/**
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* Remove all packets of the given type from the {@link PGPSignatureSubpacketGenerator PGPSignatureSubpacketGenerators}
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* internal set.
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*
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* @param subpacketType type of subpacket to remove
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* @param subpacketGenerator subpacket generator
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*/
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public static void removeAllPacketsOfType(org.pgpainless.algorithm.SignatureSubpacket subpacketType,
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PGPSignatureSubpacketGenerator subpacketGenerator) {
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removeAllPacketsOfType(subpacketType.getCode(), subpacketGenerator);
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}
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/**
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* Remove all packets of the given type from the {@link PGPSignatureSubpacketGenerator PGPSignatureSubpacketGenerators}
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* internal set.
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*
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* @param type type of subpacket to remove
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* @param subpacketGenerator subpacket generator
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*/
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public static void removeAllPacketsOfType(int type, PGPSignatureSubpacketGenerator subpacketGenerator) {
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for (SignatureSubpacket subpacket : subpacketGenerator.getSubpackets(type)) {
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subpacketGenerator.removePacket(subpacket);
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}
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}
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/**
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* Replace all occurrences of a signature creation time subpackets in the subpacket generator
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* with a single new instance representing the provided date.
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*
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* @param date signature creation time
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* @param subpacketGenerator subpacket generator
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*/
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public static void setSignatureCreationTimeInSubpacketGenerator(Date date, PGPSignatureSubpacketGenerator subpacketGenerator) {
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removeAllPacketsOfType(SignatureSubpacketTags.CREATION_TIME, subpacketGenerator);
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subpacketGenerator.setSignatureCreationTime(false, date);
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}
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/**
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* Replace all occurrences of key expiration time subpackets in the subpacket generator
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* with a single instance representing the new expiration time.
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*
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* @param expirationDate expiration time as date or null for no expiration
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* @param creationDate date on which the key was created
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* @param subpacketGenerator subpacket generator
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*/
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public static void setKeyExpirationDateInSubpacketGenerator(Date expirationDate,
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@Nonnull Date creationDate,
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PGPSignatureSubpacketGenerator subpacketGenerator) {
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removeAllPacketsOfType(SignatureSubpacketTags.KEY_EXPIRE_TIME, subpacketGenerator);
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long secondsToExpire = SignatureSubpacketsUtil.getKeyLifetimeInSeconds(expirationDate, creationDate);
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subpacketGenerator.setKeyExpirationTime(true, secondsToExpire);
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}
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}
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