--- /dev/null
+//
+// ========================================================================
+// Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
+// ------------------------------------------------------------------------
+// All rights reserved. This program and the accompanying materials
+// are made available under the terms of the Eclipse Public License v1.0
+// and Apache License v2.0 which accompanies this distribution.
+//
+// The Eclipse Public License is available at
+// http://www.eclipse.org/legal/epl-v10.html
+//
+// The Apache License v2.0 is available at
+// http://www.opensource.org/licenses/apache2.0.php
+//
+// You may elect to redistribute this code under either of these licenses.
+// ========================================================================
+//
+
+package org.eclipse.jetty.util.security;
+
+import java.io.Serializable;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+
+import org.eclipse.jetty.util.TypeUtil;
+import org.eclipse.jetty.util.log.Log;
+import org.eclipse.jetty.util.log.Logger;
+
+/* ------------------------------------------------------------ */
+/**
+ * Credentials. The Credential class represents an abstract mechanism for
+ * checking authentication credentials. A credential instance either represents
+ * a secret, or some data that could only be derived from knowing the secret.
+ * <p>
+ * Often a Credential is related to a Password via a one way algorithm, so while
+ * a Password itself is a Credential, a UnixCrypt or MD5 digest of a a password
+ * is only a credential that can be checked against the password.
+ * <p>
+ * This class includes an implementation for unix Crypt an MD5 digest.
+ *
+ * @see Password
+ *
+ */
+public abstract class Credential implements Serializable
+{
+ private static final Logger LOG = Log.getLogger(Credential.class);
+
+ private static final long serialVersionUID = -7760551052768181572L;
+
+ /* ------------------------------------------------------------ */
+ /**
+ * Check a credential
+ *
+ * @param credentials The credential to check against. This may either be
+ * another Credential object, a Password object or a String
+ * which is interpreted by this credential.
+ * @return True if the credentials indicated that the shared secret is known
+ * to both this Credential and the passed credential.
+ */
+ public abstract boolean check(Object credentials);
+
+ /* ------------------------------------------------------------ */
+ /**
+ * Get a credential from a String. If the credential String starts with a
+ * known Credential type (eg "CRYPT:" or "MD5:" ) then a Credential of that
+ * type is returned. Else the credential is assumed to be a Password.
+ *
+ * @param credential String representation of the credential
+ * @return A Credential or Password instance.
+ */
+ public static Credential getCredential(String credential)
+ {
+ if (credential.startsWith(Crypt.__TYPE)) return new Crypt(credential);
+ if (credential.startsWith(MD5.__TYPE)) return new MD5(credential);
+
+ return new Password(credential);
+ }
+
+ /* ------------------------------------------------------------ */
+ /**
+ * Unix Crypt Credentials
+ */
+ public static class Crypt extends Credential
+ {
+ private static final long serialVersionUID = -2027792997664744210L;
+
+ public static final String __TYPE = "CRYPT:";
+
+ private final String _cooked;
+
+ Crypt(String cooked)
+ {
+ _cooked = cooked.startsWith(Crypt.__TYPE) ? cooked.substring(__TYPE.length()) : cooked;
+ }
+
+ @Override
+ public boolean check(Object credentials)
+ {
+ if (credentials instanceof char[])
+ credentials=new String((char[])credentials);
+ if (!(credentials instanceof String) && !(credentials instanceof Password))
+ LOG.warn("Can't check " + credentials.getClass() + " against CRYPT");
+
+ String passwd = credentials.toString();
+ return _cooked.equals(UnixCrypt.crypt(passwd, _cooked));
+ }
+
+ public static String crypt(String user, String pw)
+ {
+ return "CRYPT:" + UnixCrypt.crypt(pw, user);
+ }
+ }
+
+ /* ------------------------------------------------------------ */
+ /**
+ * MD5 Credentials
+ */
+ public static class MD5 extends Credential
+ {
+ private static final long serialVersionUID = 5533846540822684240L;
+
+ public static final String __TYPE = "MD5:";
+
+ public static final Object __md5Lock = new Object();
+
+ private static MessageDigest __md;
+
+ private final byte[] _digest;
+
+ /* ------------------------------------------------------------ */
+ MD5(String digest)
+ {
+ digest = digest.startsWith(__TYPE) ? digest.substring(__TYPE.length()) : digest;
+ _digest = TypeUtil.parseBytes(digest, 16);
+ }
+
+ /* ------------------------------------------------------------ */
+ public byte[] getDigest()
+ {
+ return _digest;
+ }
+
+ /* ------------------------------------------------------------ */
+ @Override
+ public boolean check(Object credentials)
+ {
+ try
+ {
+ byte[] digest = null;
+
+ if (credentials instanceof char[])
+ credentials=new String((char[])credentials);
+ if (credentials instanceof Password || credentials instanceof String)
+ {
+ synchronized (__md5Lock)
+ {
+ if (__md == null) __md = MessageDigest.getInstance("MD5");
+ __md.reset();
+ __md.update(credentials.toString().getBytes(StandardCharsets.ISO_8859_1));
+ digest = __md.digest();
+ }
+ if (digest == null || digest.length != _digest.length) return false;
+ for (int i = 0; i < digest.length; i++)
+ if (digest[i] != _digest[i]) return false;
+ return true;
+ }
+ else if (credentials instanceof MD5)
+ {
+ MD5 md5 = (MD5) credentials;
+ if (_digest.length != md5._digest.length) return false;
+ for (int i = 0; i < _digest.length; i++)
+ if (_digest[i] != md5._digest[i]) return false;
+ return true;
+ }
+ else if (credentials instanceof Credential)
+ {
+ // Allow credential to attempt check - i.e. this'll work
+ // for DigestAuthModule$Digest credentials
+ return ((Credential) credentials).check(this);
+ }
+ else
+ {
+ LOG.warn("Can't check " + credentials.getClass() + " against MD5");
+ return false;
+ }
+ }
+ catch (Exception e)
+ {
+ LOG.warn(e);
+ return false;
+ }
+ }
+
+ /* ------------------------------------------------------------ */
+ public static String digest(String password)
+ {
+ try
+ {
+ byte[] digest;
+ synchronized (__md5Lock)
+ {
+ if (__md == null)
+ {
+ try
+ {
+ __md = MessageDigest.getInstance("MD5");
+ }
+ catch (Exception e)
+ {
+ LOG.warn(e);
+ return null;
+ }
+ }
+
+ __md.reset();
+ __md.update(password.getBytes(StandardCharsets.ISO_8859_1));
+ digest = __md.digest();
+ }
+
+ return __TYPE + TypeUtil.toString(digest, 16);
+ }
+ catch (Exception e)
+ {
+ LOG.warn(e);
+ return null;
+ }
+ }
+ }
+}
projects / gigi.git / blobdiff