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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.api.config.internal;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.annotation.Nullable;
/**
* @since 3.0
*/
public final class Encryption {
private static final Pattern ENCRYPTED_PATTERN = Pattern.compile("^\\{([^{^}]*)}(.*)$");
private static final String BASE64_ALGORITHM = "b64";
private static final String AES_ECB_ALGORITHM = "aes";
private static final String AES_GCM_ALGORITHM = "aes-gcm";
private final AesECBCipher aesECBCipher;
private final AesGCMCipher aesGCMCipher;
private final Map<String, Cipher> ciphers;
public Encryption(@Nullable String pathToSecretKey) {
aesECBCipher = new AesECBCipher(pathToSecretKey);
aesGCMCipher = new AesGCMCipher(pathToSecretKey);
ciphers = new HashMap<>();
ciphers.put(BASE64_ALGORITHM, new Base64Cipher());
ciphers.put(AES_ECB_ALGORITHM, aesECBCipher);
ciphers.put(AES_GCM_ALGORITHM, aesGCMCipher);
}
public void setPathToSecretKey(@Nullable String pathToSecretKey) {
aesECBCipher.setPathToSecretKey(pathToSecretKey);
aesGCMCipher.setPathToSecretKey(pathToSecretKey);
}
/**
* Checks the availability of the secret key, that is required to encrypt and decrypt.
*/
public boolean hasSecretKey() {
return aesGCMCipher.hasSecretKey();
}
public boolean isEncrypted(String value) {
return value.indexOf('{') == 0 && value.indexOf('}') > 1;
}
public String encrypt(String clearText) {
return encrypt(AES_GCM_ALGORITHM, clearText);
}
public String scramble(String clearText) {
return encrypt(BASE64_ALGORITHM, clearText);
}
public String generateRandomSecretKey() {
return aesGCMCipher.generateRandomSecretKey();
}
public String decrypt(String encryptedText) {
Matcher matcher = ENCRYPTED_PATTERN.matcher(encryptedText);
if (matcher.matches()) {
Cipher cipher = ciphers.get(matcher.group(1).toLowerCase(Locale.ENGLISH));
if (cipher != null) {
return cipher.decrypt(matcher.group(2));
}
}
return encryptedText;
}
private String encrypt(String algorithm, String clearText) {
Cipher cipher = ciphers.get(algorithm);
if (cipher == null) {
throw new IllegalArgumentException("Unknown cipher algorithm: " + algorithm);
}
return String.format("{%s}%s", algorithm, cipher.encrypt(clearText));
}
}
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