Header中携带签名

import java.security.MessageDigest;
import sun.misc.BASE64Encoder;
import java.io.UnsupportedEncodingException;
import java.security.NoSuchAlgorithmException;

public class Md5{
     public static void main(String[] args) {
          try {
                 String exampleString = "blog";
                 MessageDigest messageDigest = MessageDigest.getInstance("MD5"); 
                 BASE64Encoder encoder = new BASE64Encoder(); 
                 //计算字符串的MD5值，然后将MD5值进行Base64编码
                 String contentMd5 = encoder.encode(messageDigest.digest(exampleString.getBytes("utf-8")));
                 System.out.println("Content-MD5:" + contentMd5);    
          } catch (NoSuchAlgorithmException | UnsupportedEncodingException e) 
          {
                 e.printStackTrace();
          }
     }
}

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Base64;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.TreeMap;

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

public class SignDemo {
	
    private static final String SIGN_SEP = "\n";
    private static final String OBS_PREFIX = "x-obs-";
    private static final String DEFAULT_ENCODING = "UTF-8";
    private static final List<String> SUB_RESOURCES = Collections.unmodifiableList(Arrays.asList(
        "CDNNotifyConfiguration", "acl", "append", "attname", "backtosource", "cors", "customdomain", "delete",
   	"deletebucket", "directcoldaccess", "encryption", "inventory", "length", "lifecycle", "location", "logging",
   	"metadata", "mirrorBackToSource", "modify", "name", "notification", "obscompresspolicy", 
   	"partNumber", "policy", "position", "quota","rename", "replication", "response-cache-control", 
   	"response-content-disposition","response-content-encoding", "response-content-language", "response-content-type", 
   	"response-expires","restore", "storageClass", "storagePolicy", "storageinfo", "tagging", "torrent", "truncate",
   	"uploadId", "uploads", "versionId", "versioning", "versions", "website", "x-image-process",
  	 "x-image-save-bucket", "x-image-save-object", "x-obs-security-token", "object-lock", "retention"));
 
    private String ak;
    private String sk;
    // 对字符串进行UTF8编码
    public String urlEncode(String input) throws UnsupportedEncodingException {
        return URLEncoder.encode(input, DEFAULT_ENCODING)
            .replaceAll("%7E", "~") //for browser
            .replaceAll("%2F", "/")
            .replaceAll("%20", "+");
    }
 
    private String join(List<?> items, String delimiter) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < items.size(); i++) {
            String item = items.get(i).toString();
            sb.append(item);
            if (i < items.size() - 1) {
                sb.append(delimiter);
            }
        }
        return sb.toString();
    }
	
    private boolean isValid(String input) {
        return input != null && !input.equals("");
    }

    // 使用访问密钥SK计算HmacSHA1值
    public String hmacSha1(String input) throws NoSuchAlgorithmException, InvalidKeyException, UnsupportedEncodingException {
        SecretKeySpec signingKey = new SecretKeySpec(this.sk.getBytes(DEFAULT_ENCODING), "HmacSHA1");
        // 获取Mac实例，并通过getInstance方法指定使用HMAC-SHA1算法
        Mac mac = Mac.getInstance("HmacSHA1");
        // 使用访问密钥SK初始化Mac对象
        mac.init(signingKey);
        return Base64.getEncoder().encodeToString(mac.doFinal(input.getBytes(DEFAULT_ENCODING)));
    }

    // 构造StringToSign
    private String stringToSign(String httpMethod, Map<String, String[]> headers, Map<String, String> queries,
        String bucketName, String objectName) throws Exception{
        String contentMd5 = "";
        String contentType = "";
        String date = "";
		
        TreeMap<String, String> canonicalizedHeaders = new TreeMap<String, String>();
		
        String key;
        List<String> temp = new ArrayList<String>();
        for(Map.Entry<String, String[]> entry : headers.entrySet()) {
            key = entry.getKey();
            if(key == null || entry.getValue() == null || entry.getValue().length == 0) {
                continue;
            }
			
            key = key.trim().toLowerCase(Locale.ENGLISH);
            if(key.equals("content-md5")) {
                contentMd5 = entry.getValue()[0];
                continue;
            }
			
            if(key.equals("content-type")) {
                contentType = entry.getValue()[0];
                continue;
            }
			
            if(key.equals("date")) {
                date = entry.getValue()[0];
                continue;
            }
			
            if(key.startsWith(OBS_PREFIX)) {				
                for(String value : entry.getValue()) {
                    if(value != null) {
                        temp.add(value.trim());
                    }
                }
                canonicalizedHeaders.put(key, this.join(temp, ","));
                temp.clear();
            }
        }
	// 如果header头域中包含x-obs-date，Date参数置空
        if(canonicalizedHeaders.containsKey("x-obs-date")) {
            date = "";
        }	
		
        // 构造StringToSign，拼接HTTP-Verb、Content-MD5、Content-Type、Date
        StringBuilder stringToSign = new StringBuilder();
        stringToSign.append(httpMethod).append(SIGN_SEP)
            .append(contentMd5).append(SIGN_SEP)
            .append(contentType).append(SIGN_SEP)
            .append(date).append(SIGN_SEP);
			
        // 构造StringToSign，拼接CanonicalizedHeaders
        for(Map.Entry<String, String> entry : canonicalizedHeaders.entrySet()) {
            stringToSign.append(entry.getKey()).append(":").append(entry.getValue()).append(SIGN_SEP);
        }
		
        // 构造StringToSign，拼接CanonicalizedResource
        stringToSign.append("/");
        if(this.isValid(bucketName)) {
            stringToSign.append(bucketName).append("/");
            if(this.isValid(objectName)) {
                stringToSign.append(this.urlEncode(objectName));
            }
        }
		
        TreeMap<String, String> canonicalizedResource = new TreeMap<String, String>();
        for(Map.Entry<String, String> entry : queries.entrySet()) {
            key = entry.getKey();
            if(key == null) {
                continue;
            }
			
            if(SUB_RESOURCES.contains(key)) {
                canonicalizedResource.put(key, entry.getValue());
            }
        }
		
        if(canonicalizedResource.size() > 0) {
            stringToSign.append("?");
            for(Map.Entry<String, String> entry : canonicalizedResource.entrySet()) {
                stringToSign.append(entry.getKey());
                if(this.isValid(entry.getValue())) {
                    stringToSign.append("=").append(entry.getValue());
                }
                stringToSign.append("&");
            }
            stringToSign.deleteCharAt(stringToSign.length()-1);
        }
		
        // System.out.println(String.format("StringToSign:%s%s", SIGN_SEP, stringToSign.toString()));
		
        return stringToSign.toString();
    }
	
    public String headerSignature(String httpMethod, Map<String, String[]> headers, Map<String, String> queries, String bucketName, String objectName) throws Exception {

        // 构造StringToSign
        String stringToSign = this.stringToSign(httpMethod, headers, queries, bucketName, objectName);
		
        // 计算签名
        return String.format("OBS %s:%s", this.ak, this.hmacSha1(stringToSign));
    }
	
    public static void main(String[] args) throws Exception {
        SignDemo demo = new SignDemo();

        /* 认证用的ak和sk硬编码到代码中或者明文存储都有很大的安全风险，建议在配置文件或者环境变量中密文存放，使用时解密，确保安全；
        本示例以ak和sk保存在环境变量中为例，运行本示例前请先在本地环境中设置环境变量HUAWEICLOUD_SDK_AK和HUAWEICLOUD_SDK_SK。*/
        demo.ak = System.getenv("HUAWEICLOUD_SDK_AK");
        demo.sk = System.getenv("HUAWEICLOUD_SDK_SK");
		
        String bucketName = "bucket-test";
        String objectName = "hello.jpg";
        Map<String, String[]> headers = new HashMap<String, String[]>();
        headers.put("date", new String[] {"Sat, 12 Oct 2015 08:12:38 GMT"});
        headers.put("x-obs-acl", new String[] {"public-read"});
        headers.put("x-obs-meta-key1", new String[] {"value1"});
        headers.put("x-obs-meta-key2", new String[] {"value2", "value3"});
        Map<String, String> queries = new HashMap<String, String>();
        queries.put("acl", null);
	
        //计算Header中携带的签名	
        System.out.println(demo.headerSignature("PUT", headers, queries, bucketName, objectName));
    }
	
}

import os
import sys
import hashlib
import hmac
import binascii
from datetime import datetime
IS_PYTHON2 = sys.version_info.major == 2 or sys.version < '3'

# 认证用的ak和sk硬编码到代码中或者明文存储都有很大的安全风险，建议在配置文件或者环境变量中密文存放，使用时解密，确保安全；
# 本示例以ak和sk保存在环境变量中为例，运行本示例前请先在本地环境中设置环境变量HUAWEICLOUD_SDK_AK和HUAWEICLOUD_SDK_SK。
yourSecretAccessKeyID = os.getenv('HUAWEICLOUD_SDK_SK')

httpMethod = "PUT"
contentType = "application/xml"
# "date" 是请求生成的时间
date = datetime.utcnow().strftime('%a, %d %b %Y %H:%M:%S GMT')
canonicalizedHeaders = "x-obs-acl:private\n"
CanonicalizedResource = "/newbucketname2"

# 构造StringToSign
canonical_string = httpMethod + "\n" + "\n" + contentType + "\n" + date + "\n" + canonicalizedHeaders + CanonicalizedResource

# 计算签名，签名公式公式为Signature = Base64( HMAC-SHA1( YourSecretAccessKeyID, UTF-8-Encoding-Of( StringToSign ) ) )
if IS_PYTHON2:    
    hashed = hmac.new(yourSecretAccessKeyID, canonical_string, hashlib.sha1)    
    encode_canonical = binascii.b2a_base64(hashed.digest())[:-1]
else:    
    hashed = hmac.new(yourSecretAccessKeyID.encode('UTF-8'), canonical_string.encode('UTF-8'), hashlib.sha1)
    encode_canonical = binascii.b2a_base64(hashed.digest())[:-1].decode('UTF-8')

print(encode_canonical)