# 签名

### 签名规则：

 1：签名中出现&，为连接符，非运算符，签名规则：body体中signature不参与签名，但header中的timestamp参与body签名 

2：其余以参数名的字典升序排序（ascii码升序），且值不为空，并拼接"key=value"格式，多参数之间以&链接，得到A 值为空，不参与签名 只有数字类型以及字符串类型,参与签名 

3：timestamp=时间戳，得到B，然后B\&A得到C 

4：将C使用MD5加密并全部字母变为大写，得到最终值D，即为signature值 

5：body中需要增加signature，然后对body中数据，转为json后，进行encode转码，得到E 

6：用公司公钥将E进行加密，得到F，其请求key值为data F长度以100长度分割，进行分段加密，加密后的值，需以用","进行拼接 7：最终请求参数结构如下：

```json
//请求header
{
    "timestamp": 11111131331,
    "trace": "xxxxxx"
}

//请求body
{
    "data": F
}
```

### 签名示例：

1：a=1\&b=2\&c=3\&timestamp=11111131331，即为A 

2：timestamp=11111131331，即为B 

3: A\&B 即 timestamp=11111131331\&a=1\&b=2\&c=3\&timestamp=11111131331 为最终C取值 

4：将C进行MD5加密并全部字母变为大写，得到最终签名密钥 

5：对所有body参数，转为json后，encode转码，得到E 

6：RSA加密 用公司公钥将E加密，得到F 若E长度>100,则RSA(E\[0-100])=E1,RSA\[E\[剩余长度]]=E2，最终F=E1,E2

> 增加签名后的内容：

```json
//请求header
{
   "timestamp": 11111131331,
   "trace": "xxxxxx"
}

//请求body
{
   "a": 1,
   "b": 2,
   "c": "3",
   "signature": "44b3a042-dd5d-4796-92e1-651927b6ada9"
}
```

> 参数加密后的内容：

```json
//请求header
{
    "timestamp": 11111131331,
    "trace": "xxxxxx"
}

//请求body
{
    "data": F
}
```

### JAVA DEMO

<https://github.com/CTradeExchange/multimarket-demo>


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