获取凭证的签名

**Java获取凭证的签名**
```
public static String getSignature( String key, String secret, String timestamp){
String[] arr = new String[] { key, secret, timestamp };
		// key、secret、timestamp三个参数进行字典序排序
        Arrays.sort(arr);
        StringBuilder sb = new StringBuilder();
		//将三个参数字符串拼接成一个字符串
        for (int i = 0; i < arr.length; i++) {
            sb.append(arr[i]);
        }
        MessageDigest md;
        String signature = null;
        try {
            md = MessageDigest.getInstance("SHA-1");
            // 进行sha1摘要
            byte[] digest = md.digest(sb.toString().getBytes());
            signature = byteToStr(digest);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
		return signature;
}

/**
     * 将字节数组转换为十六进制字符串
     *
     * @param byteArray
     * @return
     */
    private static String byteToStr(byte[] byteArray) {
        String strDigest = "";
        for (int i = 0; i < byteArray.length; i++) {
            strDigest += byteToHexStr(byteArray[i]);
        }
        return strDigest;
    }

/**
     * 将字节转换为十六进制字符串
     *
     * @param mByte
     * @return
     */
    private static String byteToHexStr(byte mByte) {
        char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
        char[] tempArr = new char[2];
        tempArr[0] = Digit[(mByte >>> 4) & 0X0F];
        tempArr[1] = Digit[mByte & 0X0F];
        String s = new String(tempArr);
        return s;
    }
```
**C++获取凭证的签名**
```
时间戳获取：
FString UPXYAPIManager::GetTimestamp()
{
   int64 sec_since_epoch = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
   return std::to_string(sec_since_epoch).c_str();
}
生成签名：
FString UPXYAPIManager::GetSignature(const FString& Key, const FString& Secret, const FString Timestamp)
{
   TArray<FString> Strings{Key, Secret, Timestamp};
   Strings.Sort();
   
   FString OriginString{};
   for (const FString& Item : Strings)
   {
      OriginString.Append(Item);
   }
   
   std::string stdstring(TCHAR_TO_UTF8(*OriginString));
   FSHA1 HashState;
   HashState.Update((uint8*)stdstring.c_str(), stdstring.size());
   HashState.Final();

uint8 Hash[FSHA1::DigestSize];
   HashState.GetHash(Hash);
   FString Signature {BytesToHex(Hash, FSHA1::DigestSize)};
   return Signature;
   
}
```
**PHP获取凭证的签名**
```
//Sort the key, secret, and timestamp parameters in alphabetical order
sort($arr, SORT_NATURAL);
$string = implode('', $arr);
$signature = sha1($string);
		```
**Shell 获取凭证的签名**
```bash
function larkxr.getSignature() {
        
        # 排序
        __sort() {
                arr=(`echo -e "${adminKeys[adminKey]}\n${adminKeys[adminSecret]}\n${adminKeys[timestamp]}" |sort`)
        }
        
        declare -A adminKeys=(
                [adminKey]=603284317954637824
                [adminSecret]=c8333614aca34ebcb6fbaccc31196d37
                [timestamp]=$(( `date +%s%N` / 1000000 ))	# 获取时间戳

# 生成凭证
                [signature]=`__sort;echo -ne "${arr[0]}${arr[1]}${arr[2]}" | sha1sum | awk '{print $1}'`
        )

}

larkxr.getSignature
```