author | chegar |
Fri, 16 Sep 2011 12:09:04 -0700 | |
changeset 10596 | 39b3a979e600 |
parent 7668 | d4a77089c587 |
child 15264 | 3baf7f9d320d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.net.httpserver; |
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/** |
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* BasicAuthenticator provides an implementation of HTTP Basic |
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* authentication. It is an abstract class and must be extended |
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* to provide an implementation of {@link #checkCredentials(String,String)} |
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* which is called to verify each incoming request. |
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*/ |
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public abstract class BasicAuthenticator extends Authenticator { |
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protected String realm; |
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/** |
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* Creates a BasicAuthenticator for the given HTTP realm |
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* @param realm The HTTP Basic authentication realm |
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* @throws NullPointerException if the realm is an empty string |
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*/ |
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public BasicAuthenticator (String realm) { |
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this.realm = realm; |
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} |
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/** |
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* returns the realm this BasicAuthenticator was created with |
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* @return the authenticator's realm string. |
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*/ |
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public String getRealm () { |
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return realm; |
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} |
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public Result authenticate (HttpExchange t) |
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{ |
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Headers rmap = t.getRequestHeaders(); |
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/* |
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* look for auth token |
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*/ |
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String auth = rmap.getFirst ("Authorization"); |
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if (auth == null) { |
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Headers map = t.getResponseHeaders(); |
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map.set ("WWW-Authenticate", "Basic realm=" + "\""+realm+"\""); |
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return new Authenticator.Retry (401); |
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} |
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int sp = auth.indexOf (' '); |
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if (sp == -1 || !auth.substring(0, sp).equals ("Basic")) { |
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return new Authenticator.Failure (401); |
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} |
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byte[] b = Base64.base64ToByteArray (auth.substring(sp+1)); |
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String userpass = new String (b); |
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int colon = userpass.indexOf (':'); |
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String uname = userpass.substring (0, colon); |
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String pass = userpass.substring (colon+1); |
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if (checkCredentials (uname, pass)) { |
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return new Authenticator.Success ( |
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new HttpPrincipal ( |
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uname, realm |
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) |
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); |
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} else { |
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/* reject the request again with 401 */ |
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Headers map = t.getResponseHeaders(); |
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map.set ("WWW-Authenticate", "Basic realm=" + "\""+realm+"\""); |
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return new Authenticator.Failure(401); |
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} |
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} |
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/** |
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* called for each incoming request to verify the |
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* given name and password in the context of this |
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* Authenticator's realm. Any caching of credentials |
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* must be done by the implementation of this method |
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* @param username the username from the request |
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* @param password the password from the request |
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* @return <code>true</code> if the credentials are valid, |
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* <code>false</code> otherwise. |
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*/ |
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public abstract boolean checkCredentials (String username, String password); |
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} |
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class Base64 { |
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/** |
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* Translates the specified byte array into a Base64 string as per |
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* Preferences.put(byte[]). |
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*/ |
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static String byteArrayToBase64(byte[] a) { |
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return byteArrayToBase64(a, false); |
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} |
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/** |
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* Translates the specified byte array into an "aternate representation" |
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* Base64 string. This non-standard variant uses an alphabet that does |
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* not contain the uppercase alphabetic characters, which makes it |
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* suitable for use in situations where case-folding occurs. |
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*/ |
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static String byteArrayToAltBase64(byte[] a) { |
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return byteArrayToBase64(a, true); |
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} |
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private static String byteArrayToBase64(byte[] a, boolean alternate) { |
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int aLen = a.length; |
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int numFullGroups = aLen/3; |
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int numBytesInPartialGroup = aLen - 3*numFullGroups; |
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int resultLen = 4*((aLen + 2)/3); |
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StringBuffer result = new StringBuffer(resultLen); |
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char[] intToAlpha = (alternate ? intToAltBase64 : intToBase64); |
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// Translate all full groups from byte array elements to Base64 |
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int inCursor = 0; |
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for (int i=0; i<numFullGroups; i++) { |
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int byte0 = a[inCursor++] & 0xff; |
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int byte1 = a[inCursor++] & 0xff; |
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int byte2 = a[inCursor++] & 0xff; |
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result.append(intToAlpha[byte0 >> 2]); |
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result.append(intToAlpha[(byte0 << 4)&0x3f | (byte1 >> 4)]); |
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result.append(intToAlpha[(byte1 << 2)&0x3f | (byte2 >> 6)]); |
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result.append(intToAlpha[byte2 & 0x3f]); |
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} |
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// Translate partial group if present |
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if (numBytesInPartialGroup != 0) { |
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int byte0 = a[inCursor++] & 0xff; |
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result.append(intToAlpha[byte0 >> 2]); |
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if (numBytesInPartialGroup == 1) { |
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result.append(intToAlpha[(byte0 << 4) & 0x3f]); |
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result.append("=="); |
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} else { |
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// assert numBytesInPartialGroup == 2; |
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int byte1 = a[inCursor++] & 0xff; |
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result.append(intToAlpha[(byte0 << 4)&0x3f | (byte1 >> 4)]); |
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result.append(intToAlpha[(byte1 << 2)&0x3f]); |
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result.append('='); |
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} |
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} |
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// assert inCursor == a.length; |
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// assert result.length() == resultLen; |
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return result.toString(); |
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} |
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/** |
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* This array is a lookup table that translates 6-bit positive integer |
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* index values into their "Base64 Alphabet" equivalents as specified |
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* in Table 1 of RFC 2045. |
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*/ |
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private static final char intToBase64[] = { |
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'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', |
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'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', |
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'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', |
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'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', |
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' |
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}; |
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/** |
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* This array is a lookup table that translates 6-bit positive integer |
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* index values into their "Alternate Base64 Alphabet" equivalents. |
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* This is NOT the real Base64 Alphabet as per in Table 1 of RFC 2045. |
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* This alternate alphabet does not use the capital letters. It is |
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* designed for use in environments where "case folding" occurs. |
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*/ |
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private static final char intToAltBase64[] = { |
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'!', '"', '#', '$', '%', '&', '\'', '(', ')', ',', '-', '.', ':', |
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';', '<', '>', '@', '[', ']', '^', '`', '_', '{', '|', '}', '~', |
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'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', |
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'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', |
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '?' |
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}; |
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/** |
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* Translates the specified Base64 string (as per Preferences.get(byte[])) |
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* into a byte array. |
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* |
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* @throw IllegalArgumentException if <tt>s</tt> is not a valid Base64 |
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* string. |
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*/ |
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static byte[] base64ToByteArray(String s) { |
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return base64ToByteArray(s, false); |
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} |
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/** |
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* Translates the specified "aternate representation" Base64 string |
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* into a byte array. |
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* |
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* @throw IllegalArgumentException or ArrayOutOfBoundsException |
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* if <tt>s</tt> is not a valid alternate representation |
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* Base64 string. |
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*/ |
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static byte[] altBase64ToByteArray(String s) { |
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return base64ToByteArray(s, true); |
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} |
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private static byte[] base64ToByteArray(String s, boolean alternate) { |
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byte[] alphaToInt = (alternate ? altBase64ToInt : base64ToInt); |
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int sLen = s.length(); |
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int numGroups = sLen/4; |
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if (4*numGroups != sLen) |
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throw new IllegalArgumentException( |
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"String length must be a multiple of four."); |
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int missingBytesInLastGroup = 0; |
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int numFullGroups = numGroups; |
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if (sLen != 0) { |
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if (s.charAt(sLen-1) == '=') { |
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missingBytesInLastGroup++; |
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numFullGroups--; |
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} |
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if (s.charAt(sLen-2) == '=') |
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missingBytesInLastGroup++; |
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} |
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byte[] result = new byte[3*numGroups - missingBytesInLastGroup]; |
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// Translate all full groups from base64 to byte array elements |
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int inCursor = 0, outCursor = 0; |
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for (int i=0; i<numFullGroups; i++) { |
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int ch0 = base64toInt(s.charAt(inCursor++), alphaToInt); |
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int ch1 = base64toInt(s.charAt(inCursor++), alphaToInt); |
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int ch2 = base64toInt(s.charAt(inCursor++), alphaToInt); |
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int ch3 = base64toInt(s.charAt(inCursor++), alphaToInt); |
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result[outCursor++] = (byte) ((ch0 << 2) | (ch1 >> 4)); |
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result[outCursor++] = (byte) ((ch1 << 4) | (ch2 >> 2)); |
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result[outCursor++] = (byte) ((ch2 << 6) | ch3); |
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} |
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// Translate partial group, if present |
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if (missingBytesInLastGroup != 0) { |
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int ch0 = base64toInt(s.charAt(inCursor++), alphaToInt); |
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int ch1 = base64toInt(s.charAt(inCursor++), alphaToInt); |
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result[outCursor++] = (byte) ((ch0 << 2) | (ch1 >> 4)); |
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if (missingBytesInLastGroup == 1) { |
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int ch2 = base64toInt(s.charAt(inCursor++), alphaToInt); |
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result[outCursor++] = (byte) ((ch1 << 4) | (ch2 >> 2)); |
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} |
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} |
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// assert inCursor == s.length()-missingBytesInLastGroup; |
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// assert outCursor == result.length; |
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return result; |
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} |
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/** |
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* Translates the specified character, which is assumed to be in the |
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* "Base 64 Alphabet" into its equivalent 6-bit positive integer. |
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* |
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* @throw IllegalArgumentException or ArrayOutOfBoundsException if |
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* c is not in the Base64 Alphabet. |
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*/ |
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private static int base64toInt(char c, byte[] alphaToInt) { |
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int result = alphaToInt[c]; |
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if (result < 0) |
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throw new IllegalArgumentException("Illegal character " + c); |
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return result; |
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} |
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/** |
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278 |
* This array is a lookup table that translates unicode characters |
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* drawn from the "Base64 Alphabet" (as specified in Table 1 of RFC 2045) |
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* into their 6-bit positive integer equivalents. Characters that |
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* are not in the Base64 alphabet but fall within the bounds of the |
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* array are translated to -1. |
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*/ |
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private static final byte base64ToInt[] = { |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, |
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55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, |
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5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, |
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24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, |
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35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51 |
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}; |
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293 |
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/** |
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295 |
* This array is the analogue of base64ToInt, but for the nonstandard |
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* variant that avoids the use of uppercase alphabetic characters. |
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*/ |
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private static final byte altBase64ToInt[] = { |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, |
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2, 3, 4, 5, 6, 7, 8, -1, 62, 9, 10, 11, -1 , 52, 53, 54, 55, 56, 57, |
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58, 59, 60, 61, 12, 13, 14, -1, 15, 63, 16, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, |
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-1, -1, -1, 17, -1, 18, 19, 21, 20, 26, 27, 28, 29, 30, 31, 32, 33, |
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34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, |
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51, 22, 23, 24, 25 |
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}; |
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308 |
||
309 |
} |