61 lines
1.7 KiB
Java
61 lines
1.7 KiB
Java
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package pgp.cert_d;
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import pgp.certificate_store.exception.BadNameException;
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import java.io.File;
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import java.util.regex.Pattern;
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public class FilenameResolver {
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private final File baseDirectory;
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private final Pattern openPgpV4FingerprintPattern = Pattern.compile("^[a-f0-9]{40}$");
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public FilenameResolver(File baseDirectory) {
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this.baseDirectory = baseDirectory;
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}
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public File getBaseDirectory() {
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return baseDirectory;
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}
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/**
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* Calculate the file location for the certificate addressed by the given
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* lowercase hexadecimal OpenPGP fingerprint.
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*
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* @param fingerprint fingerprint
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* @return absolute certificate file location
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* @throws BadNameException
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*/
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public File getCertFileByFingerprint(String fingerprint) throws BadNameException {
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if (!isFingerprint(fingerprint)) {
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throw new BadNameException();
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}
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// is fingerprint
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File subdirectory = new File(getBaseDirectory(), fingerprint.substring(0, 2));
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File file = new File(subdirectory, fingerprint.substring(2));
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return file;
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}
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public File getCertFileBySpecialName(String specialName) throws BadNameException {
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if (!isSpecialName(specialName)) {
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throw new BadNameException();
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}
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return new File(getBaseDirectory(), specialName);
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}
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private boolean isFingerprint(String fingerprint) {
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return openPgpV4FingerprintPattern.matcher(fingerprint).matches();
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}
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private boolean isSpecialName(String specialName) {
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return SpecialNames.lookupSpecialName(specialName) != null;
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}
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}
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