Commit 3e468cb0 authored by Peter Centgraf's avatar Peter Centgraf Committed by Ard Schrijvers

REPO-2180 [Backport 11.2] Use current PasswordHelper.getHashingAlgorithm()...

REPO-2180 [Backport 11.2] Use current PasswordHelper.getHashingAlgorithm() instead of a Cypher in RepositoryUserManager

(cherry picked from commit 3f1e414c)
(cherry picked from commit 5e036bc8)
parent 1744bd5b
......@@ -15,17 +15,12 @@
import java.util.Arrays;
import java.util.UUID;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;
import javax.jcr.Node;
import javax.jcr.RepositoryException;
import javax.jcr.SimpleCredentials;
......@@ -43,6 +38,8 @@ import;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
* UserManager backend that stores the users inside the JCR repository
......@@ -51,9 +48,13 @@ public class RepositoryUserManager extends AbstractUserManager {
private static final Logger log = LoggerFactory.getLogger(RepositoryUserManager.class);
private static final String SECURITY_PATH = HippoNodeType.CONFIGURATION_PATH + "/" + HippoNodeType.SECURITY_PATH;
// note we include a random uuid to make sure that *before* a successful login the attribute name is not known
// on the SimpleCredentials object
private static final String IDENTITY_SECRET = RepositoryUserManager.class.getName() + ".identitySecret";
// The attribute name under which we will store a token indicating that a SimpleCredentials object has been
// pre-approved for login for the contained user ID.
private static final String PREAPPROVAL_TOKEN_ATTR = RepositoryUserManager.class.getName() + ".preapprovalToken";
// A cryptographically-strong random token that is used to "sign" a pre-approval token as having been approved
// by this instance of this class, valid only for the lifespan of this JVM process.
private static final byte[] masterKey = UUID.randomUUID().toString().getBytes();
private static final long ONEDAYMS = 1000 * 3600 * 24;
......@@ -123,21 +124,26 @@ public class RepositoryUserManager extends AbstractUserManager {
return true;
byte[] storedIdentitySecret = (byte[])creds.getAttribute(IDENTITY_SECRET);
// Does this credentials object have a preapproval token?
final byte[] storedPreapprovalToken = (byte[]) creds.getAttribute(PREAPPROVAL_TOKEN_ATTR);
if (storedIdentitySecret != null) {
final int identity = IdentityCipher.INSTANCE.decrypt(storedIdentitySecret);
return identity == System.identityHashCode(creds);
// If yes, verify that the token belongs to this creds instance and is 'signed' by this class.
// Use the result instead of doing a normal password check.
final byte[] computedPreapprovalToken = computePreapprovalToken(creds);
if (storedPreapprovalToken != null) {
return Arrays.equals(storedPreapprovalToken, computedPreapprovalToken);
// do regular password check
// If no preapproval token exists, do the regular password check
final boolean result = PasswordHelper.checkHash(password, getPasswordHash(userinfo));
// store a secret for authentication on creds instance, but clear the actual password to avoid plaintext attack
// If the credentials are valid for the given user ID, store a token to indicate that the creds instance
// has been pre-approved and does not need to be checked again.
if (result) {
final byte[] identitySecret = IdentityCipher.INSTANCE.encrypt(creds);
creds.setAttribute(IDENTITY_SECRET, identitySecret);
creds.setAttribute(PREAPPROVAL_TOKEN_ATTR, computedPreapprovalToken);
// Clear the actual password to avoid plaintext attack, regardless of the result.
return result;
} catch (NoSuchAlgorithmException e) {
......@@ -197,47 +203,11 @@ public class RepositoryUserManager extends AbstractUserManager {
return false;
public static final class IdentityCipher {
private static final IdentityCipher INSTANCE = new IdentityCipher();
private final SecretKeySpec secret;
private IdentityCipher() {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
secret = new SecretKeySpec(kgen.generateKey().getEncoded(), "AES");
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("Encryption method AES could not be found", e);
public byte[] encrypt(final Object object) {
try {
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, secret);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(baos);
return cipher.doFinal(baos.toByteArray());
} catch (Exception e) {
throw new RuntimeException("Failed to encrypt object identity", e);
public int decrypt(byte[] bytes) {
try {
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, secret);
byte[] decrypted = cipher.doFinal(bytes);
ByteArrayInputStream baos = new ByteArrayInputStream(decrypted);
ObjectInputStream ois = new ObjectInputStream(baos);
return (int) ois.readObject();
} catch (Exception e) {
throw new RuntimeException("Could not decrypt object identity", e);
private byte[] computePreapprovalToken(SimpleCredentials creds) throws NoSuchAlgorithmException {
MessageDigest md = MessageDigest.getInstance(PasswordHelper.getHashingAlgorithm());
final byte[] credsId = Ints.toByteArray(System.identityHashCode(creds));
return md.digest(credsId);
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