AuthUtils.java
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package com.cnlive.demo.rdupload;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.SignatureException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import com.ksyun.ks3.model.acl.Authorization;
import com.ksyun.ks3.services.request.Ks3HttpRequest;
import com.ksyun.ks3.util.ByteUtil;
import android.text.TextUtils;
import android.util.Base64;
/**
*
* 签名工具类
*
*/
public class AuthUtils {
public static String calcAuthorization(Authorization auth,
Ks3HttpRequest request) throws SignatureException {
String signature = calcSignature(auth.getAccessKeySecret(), request);
String value = "KSS " + auth.getAccessKeyId() + ":" + signature;
return value;
}
private static String calcSignature(String accessKeySecret,
Ks3HttpRequest request) throws SignatureException {
String resource = CanonicalizedKSSResource(request);
String requestMethod = request.getHttpMethod().toString();
String contentMd5 = request.getContentMD5();
String contentType = request.getContentType();
String _signDate = request.getDate();
List<String> signList = new ArrayList<String>();
signList.addAll(Arrays.asList(new String[] { requestMethod, contentMd5,
contentType, _signDate }));
String _headers = CanonicalizedKSSHeaders(request);
if (_headers != null && !_headers.equals("")) {
signList.add(_headers);
}
signList.add(resource);
String signStr = TextUtils.join("\n", signList.toArray());
String serverSignature = calculateRFC2104HMAC(signStr, accessKeySecret);
return serverSignature;
}
// AuthListener方式，签名计算方法
public static String calcAuthToken(String httpMethod, String contentType,
String date, String contentMD5, String resource, String Headers,
String accessKeyId, String accessKeySecret)
throws SignatureException {
List<String> signList = new ArrayList<String>();
signList.addAll(Arrays.asList(new String[] { httpMethod, contentMD5,
contentType, date }));
String _headers = Headers;
if (_headers != null && !_headers.equals("")) {
signList.add(_headers);
}
signList.add(resource);
String signStr = TextUtils.join("\n", signList.toArray());
String serverSignature = calculateRFC2104HMAC(signStr, accessKeySecret);
String value = "KSS " + accessKeyId + ":" + serverSignature;
return value;
}
public static String CanonicalizedKSSResource(Ks3HttpRequest request) {
boolean escapeDoubleSlash = true;
String bucketName = request.getBucketname();
String objectKey = request.getObjectkey();
StringBuffer buffer = new StringBuffer();
buffer.append("/");
if (!TextUtils.isEmpty(bucketName)) {
buffer.append(bucketName).append("/");
}
if (!TextUtils.isEmpty(objectKey)) {
String encodedPath = null;
try {
encodedPath = URLEncoder.encode(objectKey, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
if (escapeDoubleSlash) {
encodedPath = encodedPath.replace("//", "/%2F");
}
buffer.append(encodedPath);
}
String resource = buffer.toString();
String queryParams = request.getParamsToSign();
if (queryParams != null && !queryParams.equals(""))
resource = resource + "?" + queryParams;
return resource;
}
public static String CanonicalizedKSSHeaders(Ks3HttpRequest request) {
String prefix = "x-kss";
Map<String, String> headers = request.getHeader();
List<String> headList = new ArrayList<String>();
for (String _header : headers.keySet()) {
if (_header.toLowerCase().startsWith(prefix)) {
headList.add(_header);
}
}
Collections.sort(headList, new Comparator<String>() {
public int compare(String o1, String o2) {
return ByteUtil.compareTo(o1.getBytes(), o2.toString()
.getBytes());
}
});
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < headList.size(); i++) {
String _key = headList.get(i);
buffer.append(headList.get(i) + ":" + headers.get(_key));
if (i < (headList.size() - 1))
buffer.append("\n");
}
return buffer.toString();
}
private static final String HMAC_SHA1_ALGORITHM = "HmacSHA1";
public static String calculateRFC2104HMAC(String data, String key)
throws SignatureException {
String result;
try {
// get an hmac_sha1 key from the raw key bytes
SecretKeySpec signingKey = new SecretKeySpec(key.getBytes(),
HMAC_SHA1_ALGORITHM);
// get an hmac_sha1 Mac instance and initialize with the signing key
Mac mac = Mac.getInstance(HMAC_SHA1_ALGORITHM);
mac.init(signingKey);
// compute the hmac on input data bytes
byte[] rawHmac = mac.doFinal(data.getBytes());
// base64-encode the hmac
// result = new String(Base64.encodeBase64(rawHmac), "GBK");
result = Base64.encodeToString(rawHmac, Base64.DEFAULT);
} catch (Exception e) {
throw new SignatureException("Failed to generate HMAC : " + e);
}
return result;
}
}