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//
// ========================================================================
// Copyright (c) 1995-2013 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.client.security;
import java.io.IOException;
import java.security.MessageDigest;
import java.util.Map;
import org.eclipse.jetty.client.HttpExchange;
import org.eclipse.jetty.http.HttpHeaders;
import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.TypeUtil;
public class DigestAuthentication implements Authentication
{
private static final String NC = "00000001";
Realm securityRealm;
Map details;
public DigestAuthentication(Realm realm, Map details)
{
this.securityRealm=realm;
this.details=details;
}
public void setCredentials( HttpExchange exchange )
throws IOException
{
StringBuilder buffer = new StringBuilder().append("Digest");
buffer.append(" ").append("username").append('=').append('"').append(securityRealm.getPrincipal()).append('"');
buffer.append(", ").append("realm").append('=').append('"').append(String.valueOf(details.get("realm"))).append('"');
buffer.append(", ").append("nonce").append('=').append('"').append(String.valueOf(details.get("nonce"))).append('"');
buffer.append(", ").append("uri").append('=').append('"').append(exchange.getURI()).append('"');
buffer.append(", ").append("algorithm").append('=').append(String.valueOf(details.get("algorithm")));
String cnonce = newCnonce(exchange, securityRealm, details);
buffer.append(", ").append("response").append('=').append('"').append(newResponse(cnonce,
exchange, securityRealm, details)).append('"');
buffer.append(", ").append("qop").append('=').append(String.valueOf(details.get("qop")));
buffer.append(", ").append("nc").append('=').append(NC);
buffer.append(", ").append("cnonce").append('=').append('"').append(cnonce).append('"');
exchange.setRequestHeader( HttpHeaders.AUTHORIZATION,
new String(buffer.toString().getBytes(StringUtil.__ISO_8859_1)));
}
protected String newResponse(String cnonce, HttpExchange exchange, Realm securityRealm, Map details)
{
try{
MessageDigest md = MessageDigest.getInstance("MD5");
// calc A1 digest
md.update(securityRealm.getPrincipal().getBytes(StringUtil.__ISO_8859_1));
md.update((byte)':');
md.update(String.valueOf(details.get("realm")).getBytes(StringUtil.__ISO_8859_1));
md.update((byte)':');
md.update(securityRealm.getCredentials().getBytes(StringUtil.__ISO_8859_1));
byte[] ha1 = md.digest();
// calc A2 digest
md.reset();
md.update(exchange.getMethod().getBytes(StringUtil.__ISO_8859_1));
md.update((byte)':');
md.update(exchange.getURI().getBytes(StringUtil.__ISO_8859_1));
byte[] ha2=md.digest();
md.update(TypeUtil.toString(ha1,16).getBytes(StringUtil.__ISO_8859_1));
md.update((byte)':');
md.update(String.valueOf(details.get("nonce")).getBytes(StringUtil.__ISO_8859_1));
md.update((byte)':');
md.update(NC.getBytes(StringUtil.__ISO_8859_1));
md.update((byte)':');
md.update(cnonce.getBytes(StringUtil.__ISO_8859_1));
md.update((byte)':');
md.update(String.valueOf(details.get("qop")).getBytes(StringUtil.__ISO_8859_1));
md.update((byte)':');
md.update(TypeUtil.toString(ha2,16).getBytes(StringUtil.__ISO_8859_1));
byte[] digest=md.digest();
// check digest
return encode(digest);
}
catch(Exception e)
{
throw new RuntimeException(e);
}
}
protected String newCnonce(HttpExchange exchange, Realm securityRealm, Map details)
{
try
{
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] b= md.digest(String.valueOf(System.currentTimeMillis()).getBytes(StringUtil.__ISO_8859_1));
return encode(b);
}
catch(Exception e)
{
throw new RuntimeException(e);
}
}
private static String encode(byte[] data)
{
StringBuilder buffer = new StringBuilder();
for (int i=0; i<data.length; i++)
{
buffer.append(Integer.toHexString((data[i] & 0xf0) >>> 4));
buffer.append(Integer.toHexString(data[i] & 0x0f));
}
return buffer.toString();
}
}
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