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/**
* Copyright (c) 2011, 2013, Jonathan Giles, Johan Vos, Hendrik Ebbers
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of DataFX, the website javafxdata.org, nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.datafx.reader;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.GeneralSecurityException;
import java.util.List;
import java.util.Map;
import java.util.TreeSet;
import java.util.UUID;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
class OAuth {
public static final String SIGNATURE = "oauth_signature";
public static final String NONCE = "oauth_nonce";
public static final String VERSION = "oauth_version";
public static final String CONSUMER_KEY = "oauth_consumer_key";
public static final String SIGNATURE_METHOD = "oauth_signature_method";
public static final String TIMESTAMP = "oauth_timestamp";
public static String getHeader(String method, String url,
MultiValuedMap requestParams, String consumerKey, String consumerSecret)
throws UnsupportedEncodingException, GeneralSecurityException {
TreeSet params = new TreeSet();
for (Map.Entry> entry: requestParams.entrySet()) {
String key = entry.getKey();
for (String val : entry.getValue()) {
params.add(percentEncode(key)+"="+ percentEncode(val));
}
}
String nonce = getNonce();
params.add(percentEncode(NONCE)+"="+percentEncode(nonce));
String version = "1.0";
params.add(percentEncode(VERSION)+"="+percentEncode(version));
String timeStamp = Long.toString(System.currentTimeMillis() / 1000);
params.add(percentEncode(TIMESTAMP)+"="+percentEncode(timeStamp));
String signatureMethod = "HMAC-SHA1";
params.add(percentEncode(SIGNATURE_METHOD)+"="+percentEncode(signatureMethod));
params.add(percentEncode(CONSUMER_KEY)+"="+percentEncode(consumerKey));
int idx = 0;
int psize = params.size();
StringBuilder sb = new StringBuilder();
for (String part : params) {
sb.append(part);
if (++idx < psize) {
sb.append("&");
}
}
String baseString = method + "&" + percentEncode(url) + "&" + percentEncode(sb.toString());
String signKey = percentEncode(consumerSecret) + "&";
String signature = computeSignature(baseString, signKey);
StringBuilder sh = new StringBuilder("OAuth ");
sh.append(percentEncode(SIGNATURE)).append("=\"").append(percentEncode(signature)).append("\"");
sh.append(", ");
sh.append(percentEncode(NONCE)).append("=\"").append(percentEncode(nonce)).append("\"");
sh.append(", ");
sh.append(percentEncode(VERSION)).append("=\"").append(percentEncode(version)).append("\"");
sh.append(", ");
sh.append(percentEncode(CONSUMER_KEY)).append("=\"").append(percentEncode(consumerKey)).append("\"");
sh.append(", ");
sh.append(percentEncode(SIGNATURE_METHOD)).append("=\"").append(percentEncode(signatureMethod)).append("\"");
sh.append(", ");
sh.append(percentEncode(TIMESTAMP)).append("=\"").append(percentEncode(timeStamp)).append("\"");
return sh.toString();
}
private static String getNonce() {
String answer = UUID.randomUUID().toString();
return answer;
}
private static String percentEncode(String s) {
if (s == null) {
return "";
}
try {
return URLEncoder.encode(s, "UTF-8")
.replace("+", "%20").replace("*", "%2A")
.replace("%7E", "~");
} catch (UnsupportedEncodingException wow) {
throw new RuntimeException(wow.getMessage(), wow);
}
}
private static String computeSignature(String baseString, String secret) throws GeneralSecurityException, UnsupportedEncodingException {
byte[] sb = secret.getBytes();
SecretKey secretKey = new SecretKeySpec(sb, "HmacSHA1");
Mac mac = Mac.getInstance("HmacSHA1");
mac.init(secretKey);
byte[] text = baseString.getBytes();
byte[] digest = mac.doFinal(text);
String answer = Base64.encode(digest);
return answer;
}
}
