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Create DjangoPasswordVerifier.java

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Верификация PBKDF2_SHA256
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Metall 2022-09-21 08:32:53 +05:00 committed by GitHub
parent 07be86f695
commit 8bf58cff18
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LaunchServer/src/main/java/pro/gravit/launchserver/auth/password/DjangoPasswordVerifier.java Normal file
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package pro.gravit.launchserver.auth.password;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.bouncycastle.crypto.digests.SHA256Digest;
import org.bouncycastle.crypto.generators.PKCS5S2ParametersGenerator;
import org.bouncycastle.crypto.params.KeyParameter;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
public class DjangoPasswordVerifier extends PasswordVerifier {
public final Integer DEFAULT_ITERATIONS = 10000;
private static final Logger logger = LogManager.getLogger();
private static final String algorithm = "pbkdf2_sha256";
public String getEncodedHash(String password, String salt, int iterations) {
PKCS5S2ParametersGenerator generator = new PKCS5S2ParametersGenerator(new SHA256Digest());
generator.init(password.getBytes(StandardCharsets.UTF_8), salt.getBytes(), iterations);
byte[] dk = ((KeyParameter) generator.generateDerivedParameters(256)).getKey();
byte[] hashBase64 = Base64.getEncoder().encode(dk);
return new String(hashBase64);
}
public String encode(String password, String salt, int iterations) {
String hash = getEncodedHash(password, salt, iterations);
return String.format("%s$%d$%s$%s", algorithm, iterations, salt, hash);
}
@Override
public boolean check(String encryptedPassword, String password) {
String[] params = encryptedPassword.split("\\$");
if (params.length != 4) {
logger.warn(" end 1 " + params.length);
return false;
}
int iterations = Integer.parseInt(params[1]);
String salt = params[2];
String hash = encode(password, salt, iterations);
return hash.equals(encryptedPassword);
}
}