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/*
* Copyright (c) 2010-2015 Sonatype, Inc. All rights reserved.
*
* This program is licensed to you under the Apache License Version 2.0,
* and you may not use this file except in compliance with the Apache License Version 2.0.
* You may obtain a copy of the Apache License Version 2.0 at http://www.apache.org/licenses/LICENSE-2.0.
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the Apache License Version 2.0 is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
*/
package com.ning.http.util;
import static java.nio.charset.StandardCharsets.ISO_8859_1;
import static com.ning.http.util.AsyncHttpProviderUtils.getNonEmptyPath;
import static com.ning.http.util.AsyncHttpProviderUtils.getNTLM;
import static com.ning.http.util.MiscUtils.isNonEmpty;
import com.ning.http.client.ProxyServer;
import com.ning.http.client.Realm;
import com.ning.http.client.Request;
import com.ning.http.client.ntlm.NTLMEngine;
import com.ning.http.client.spnego.SpnegoEngine;
import com.ning.http.client.uri.Uri;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.List;
public final class AuthenticatorUtils {
private static final String PROXY_AUTH_HEADER = "Proxy-Authorization";
public static String perConnectionAuthorizationHeader(Request request,
Uri uri, ProxyServer proxyServer, Realm realm) throws IOException {
String authorizationHeader = null;
if (realm != null && realm.getUsePreemptiveAuth()) {
switch (realm.getScheme()) {
case NTLM:
String msg = NTLMEngine.INSTANCE.generateType1Msg();
authorizationHeader = "NTLM " + msg;
break;
case KERBEROS:
case SPNEGO:
String host;
if (proxyServer != null)
host = proxyServer.getHost();
else if (request.getVirtualHost() != null)
host = request.getVirtualHost();
else
host = uri.getHost();
try {
authorizationHeader = "Negotiate " + SpnegoEngine.INSTANCE.generateToken(host);
} catch (Throwable e) {
throw new IOException(e);
}
break;
default:
break;
}
}
return authorizationHeader;
}
public static String perRequestAuthorizationHeader(Request request,
Uri uri, Realm realm) {
String authorizationHeader = null;
if (realm != null && realm.getUsePreemptiveAuth() && !realm.isTargetProxy()) {
switch (realm.getScheme()) {
case BASIC:
authorizationHeader = computeBasicAuthentication(realm);
break;
case DIGEST:
if (isNonEmpty(realm.getNonce()))
authorizationHeader = computeDigestAuthentication(realm);
break;
case NTLM:
case KERBEROS:
case SPNEGO:
// NTLM, KERBEROS and SPNEGO are only set on the first request, see firstRequestOnlyAuthorizationHeader
case NONE:
break;
default:
throw new IllegalStateException("Invalid Authentication " + realm);
}
}
return authorizationHeader;
}
public static String perConnectionProxyAuthorizationHeader(
Request request, ProxyServer proxyServer, boolean connect)
throws IOException {
String proxyAuthorization = null;
if (connect) {
List auth = request.getHeaders().get(PROXY_AUTH_HEADER);
String ntlmHeader = getNTLM(auth);
if (ntlmHeader != null) {
proxyAuthorization = ntlmHeader;
}
} else if (proxyServer != null && proxyServer.getPrincipal() != null && isNonEmpty(proxyServer.getNtlmDomain())) {
List auth = request.getHeaders().get(PROXY_AUTH_HEADER);
if (getNTLM(auth) == null) {
String msg = NTLMEngine.INSTANCE.generateType1Msg();
proxyAuthorization = "NTLM " + msg;
}
}
return proxyAuthorization;
}
public static String perRequestProxyAuthorizationHeader(Request request,
Realm realm, ProxyServer proxyServer, boolean connect) {
String proxyAuthorization = null;
if (connect && proxyServer != null && proxyServer.getPrincipal() != null
&& proxyServer.getScheme() == Realm.AuthScheme.BASIC) {
proxyAuthorization = computeBasicAuthentication(proxyServer);
} else if (realm != null && realm.getUsePreemptiveAuth() && realm.isTargetProxy()) {
switch (realm.getScheme()) {
case BASIC:
proxyAuthorization = computeBasicAuthentication(realm);
break;
case DIGEST:
if (isNonEmpty(realm.getNonce()))
proxyAuthorization = computeDigestAuthentication(realm);
break;
case NTLM:
case KERBEROS:
case SPNEGO:
// NTLM, KERBEROS and SPNEGO are only set on the first request, see firstRequestOnlyAuthorizationHeader
case NONE:
break;
default:
throw new IllegalStateException("Invalid Authentication " + realm);
}
}
return proxyAuthorization;
}
public static String computeBasicAuthentication(Realm realm) {
return computeBasicAuthentication(realm.getPrincipal(), realm.getPassword(), realm.getCharset());
}
public static String computeBasicAuthentication(ProxyServer proxyServer) {
return computeBasicAuthentication(proxyServer.getPrincipal(), proxyServer.getPassword(), proxyServer.getCharset());
}
private static String computeBasicAuthentication(String principal, String password, Charset charset) {
String s = principal + ":" + password;
return "Basic " + Base64.encode(s.getBytes(charset));
}
public static String computeRealmURI(Realm realm) {
return computeRealmURI(realm.getUri(), realm.isUseAbsoluteURI(), realm.isOmitQuery());
}
public static String computeRealmURI(Uri uri, boolean useAbsoluteURI, boolean omitQuery) {
if (useAbsoluteURI) {
return omitQuery && MiscUtils.isNonEmpty(uri.getQuery()) ? uri.withNewQuery(null).toUrl() : uri.toUrl();
} else {
String path = getNonEmptyPath(uri);
return omitQuery || !MiscUtils.isNonEmpty(uri.getQuery()) ? path : path + "?" + uri.getQuery();
}
}
public static String computeDigestAuthentication(Realm realm) {
StringBuilder builder = new StringBuilder().append("Digest ");
append(builder, "username", realm.getPrincipal(), true);
append(builder, "realm", realm.getRealmName(), true);
append(builder, "nonce", realm.getNonce(), true);
append(builder, "uri", computeRealmURI(realm), true);
if (isNonEmpty(realm.getAlgorithm()))
append(builder, "algorithm", realm.getAlgorithm(), false);
append(builder, "response", realm.getResponse(), true);
if (realm.getOpaque() != null)
append(builder, "opaque", realm.getOpaque(), true);
if (realm.getQop() != null) {
append(builder, "qop", realm.getQop(), false);
// nc and cnonce only sent if server sent qop
append(builder, "nc", realm.getNc(), false);
append(builder, "cnonce", realm.getCnonce(), true);
}
builder.setLength(builder.length() - 2); // remove tailing ", "
// FIXME isn't there a more efficient way?
return new String(StringUtils.charSequence2Bytes(builder, ISO_8859_1));
}
private static StringBuilder append(StringBuilder builder, String name, String value, boolean quoted) {
builder.append(name).append('=');
if (quoted)
builder.append('"').append(value).append('"');
else
builder.append(value);
return builder.append(", ");
}
}