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/*
* SonarQube
* Copyright (C) 2009-2025 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.auth.saml;
import java.io.ByteArrayInputStream;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.util.Base64;
import org.sonar.api.server.ServerSide;
@ServerSide
class SamlCertificateConverter {
public static final String SPACES = "\\s+";
X509Certificate toX509Certificate(String certificateString) {
String cleanedCertificateString = sanitizeCertificateString(certificateString);
byte[] decoded = Base64.getDecoder().decode(cleanedCertificateString);
try {
CertificateFactory factory = CertificateFactory.getInstance("X.509");
return (X509Certificate) factory.generateCertificate(new ByteArrayInputStream(decoded));
} catch (CertificateException e) {
throw new IllegalStateException("Invalid certificate", e);
}
}
private static String sanitizeCertificateString(String certificateString) {
return certificateString
.replace("-----BEGIN CERTIFICATE-----", "")
.replace("-----END CERTIFICATE-----", "")
.replaceAll(SPACES, "");
}
}
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