cn.crawin.msg.gateway.http.SignUtil.java Source code

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package cn.crawin.msg.gateway.http;

import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang3.StringUtils;

import cn.crawin.msg.gateway.Constants;
import cn.crawin.msg.gateway.HttpHeader;
import cn.crawin.msg.gateway.SystemHeader;

/**
 * ??
 */
public class SignUtil {

    /**
     * ??
     *
     * @param secret APP
     * @param method HttpMethod
     * @param path
     * @param headers
     * @param querys
     * @param bodys
     * @param signHeaderPrefixList ???Header?
     * @return ???
     */
    public static String sign(String secret, String method, String path, Map<String, String> headers,
            Map<String, String> querys, Map<String, String> bodys, List<String> signHeaderPrefixList) {
        try {
            Mac hmacSha256 = Mac.getInstance(Constants.HMAC_SHA256);
            byte[] keyBytes = secret.getBytes(Constants.ENCODING);
            hmacSha256.init(new SecretKeySpec(keyBytes, 0, keyBytes.length, Constants.HMAC_SHA256));

            return new String(Base64.encodeBase64(
                    hmacSha256.doFinal(buildStringToSign(method, path, headers, querys, bodys, signHeaderPrefixList)
                            .getBytes(Constants.ENCODING))),
                    Constants.ENCODING);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * ??
     * @param method
     * @param path
     * @param headers
     * @param querys
     * @param bodys
     * @param signHeaderPrefixList
     * @return
     */
    private static String buildStringToSign(String method, String path, Map<String, String> headers,
            Map<String, String> querys, Map<String, String> bodys, List<String> signHeaderPrefixList) {
        StringBuilder sb = new StringBuilder();

        sb.append(method.toUpperCase()).append(Constants.LF);
        if (null != headers) {
            if (null != headers.get(HttpHeader.HTTP_HEADER_ACCEPT)) {
                sb.append(headers.get(HttpHeader.HTTP_HEADER_ACCEPT));
            }
            sb.append(Constants.LF);
            if (null != headers.get(HttpHeader.HTTP_HEADER_CONTENT_MD5)) {
                sb.append(headers.get(HttpHeader.HTTP_HEADER_CONTENT_MD5));
            }
            sb.append(Constants.LF);
            if (null != headers.get(HttpHeader.HTTP_HEADER_CONTENT_TYPE)) {
                sb.append(headers.get(HttpHeader.HTTP_HEADER_CONTENT_TYPE));
            }
            sb.append(Constants.LF);
            if (null != headers.get(HttpHeader.HTTP_HEADER_DATE)) {
                sb.append(headers.get(HttpHeader.HTTP_HEADER_DATE));
            }
        }
        sb.append(Constants.LF);
        sb.append(buildHeaders(headers, signHeaderPrefixList));
        sb.append(buildResource(path, querys, bodys));

        return sb.toString();
    }

    /**
     * ??Path+Query+BODY
     *
     * @param path
     * @param querys
     * @param bodys
     * @return ??
     */
    private static String buildResource(String path, Map<String, String> querys, Map<String, String> bodys) {
        StringBuilder sb = new StringBuilder();

        if (!StringUtils.isBlank(path)) {
            sb.append(path);
        }
        Map<String, String> sortMap = new TreeMap<String, String>();
        if (null != querys) {
            for (Map.Entry<String, String> query : querys.entrySet()) {
                if (!StringUtils.isBlank(query.getKey())) {
                    sortMap.put(query.getKey(), query.getValue());
                }
            }
        }

        if (null != bodys) {
            for (Map.Entry<String, String> body : bodys.entrySet()) {
                if (!StringUtils.isBlank(body.getKey())) {
                    sortMap.put(body.getKey(), body.getValue());
                }
            }
        }

        StringBuilder sbParam = new StringBuilder();
        for (Map.Entry<String, String> item : sortMap.entrySet()) {
            if (!StringUtils.isBlank(item.getKey())) {
                if (0 < sbParam.length()) {
                    sbParam.append(Constants.SPE3);
                }
                sbParam.append(item.getKey());
                if (!StringUtils.isBlank(item.getValue())) {
                    sbParam.append(Constants.SPE4).append(item.getValue());
                }
            }
        }
        if (0 < sbParam.length()) {
            sb.append(Constants.SPE5);
            sb.append(sbParam);
        }

        return sb.toString();
    }

    /**
     * ??Http
     *
     * @param headers Http
     * @param signHeaderPrefixList ???Header?
     * @return ??Http
     */
    private static String buildHeaders(Map<String, String> headers, List<String> signHeaderPrefixList) {
        StringBuilder sb = new StringBuilder();

        if (null != signHeaderPrefixList) {
            signHeaderPrefixList.remove(SystemHeader.X_CA_SIGNATURE);
            signHeaderPrefixList.remove(HttpHeader.HTTP_HEADER_ACCEPT);
            signHeaderPrefixList.remove(HttpHeader.HTTP_HEADER_CONTENT_MD5);
            signHeaderPrefixList.remove(HttpHeader.HTTP_HEADER_CONTENT_TYPE);
            signHeaderPrefixList.remove(HttpHeader.HTTP_HEADER_DATE);
            Collections.sort(signHeaderPrefixList);
            if (null != headers) {
                Map<String, String> sortMap = new TreeMap<String, String>();
                sortMap.putAll(headers);
                StringBuilder signHeadersStringBuilder = new StringBuilder();
                for (Map.Entry<String, String> header : sortMap.entrySet()) {
                    if (isHeaderToSign(header.getKey(), signHeaderPrefixList)) {
                        sb.append(header.getKey());
                        sb.append(Constants.SPE2);
                        if (!StringUtils.isBlank(header.getValue())) {
                            sb.append(header.getValue());
                        }
                        sb.append(Constants.LF);
                        if (0 < signHeadersStringBuilder.length()) {
                            signHeadersStringBuilder.append(Constants.SPE1);
                        }
                        signHeadersStringBuilder.append(header.getKey());
                    }
                }
                headers.put(SystemHeader.X_CA_SIGNATURE_HEADERS, signHeadersStringBuilder.toString());
            }
        }

        return sb.toString();
    }

    /**
     * Http???? return
     */
    private static boolean isHeaderToSign(String headerName, List<String> signHeaderPrefixList) {
        if (StringUtils.isBlank(headerName)) {
            return false;
        }

        if (headerName.startsWith(Constants.CA_HEADER_TO_SIGN_PREFIX_SYSTEM)) {
            return true;
        }

        if (null != signHeaderPrefixList) {
            for (String signHeaderPrefix : signHeaderPrefixList) {
                if (headerName.equalsIgnoreCase(signHeaderPrefix)) {
                    return true;
                }
            }
        }

        return false;
    }
}