将{"timestamp":1685523498,"sdkVersion":"1.0.30_1","vin":"LJUBMSA24PKFFF198","sign":"969ba7272b914106179fffaa502abee81fe4661392c8f3fe083eb916bdb44955"}直接赋值为字符串
时间: 2023-07-03 08:23:45 浏览: 276
你可以使用 char 数组来直接赋值为该 JSON 字符串。以下是示例代码:
```c
#include <stdio.h>
int main() {
// 直接赋值为 JSON 字符串
char json_str[] = "{\"timestamp\":1685523498,\"sdkVersion\":\"1.0.30_1\",\"vin\":\"LJUBMSA24PKFFF198\",\"sign\":\"969ba7272b914106179fffaa502abee81fe4661392c8f3fe083eb916bdb44955\"}";
// 打印 JSON 字符串
printf("%s\n", json_str);
return 0;
}
```
输出结果为:
```
{"timestamp":1685523498,"sdkVersion":"1.0.30_1","vin":"LJUBMSA24PKFFF198","sign":"969ba7272b914106179fffaa502abee81fe4661392c8f3fe083eb916bdb44955"}
```
相关问题
c语言定义json字符串 内容{"timestamp":1685523498,"sdkVersion":"1.0.30_1","vin":"LJUBMSA24PKFFF198","sign":"969ba7272b914106179fffaa502abee81fe4661392c8f3fe083eb916bdb44955"}
你可以使用 CJSON 库来定义 JSON 字符串。以下是使用 CJSON 定义你提供的 JSON 字符串的示例代码:
```c
#include <stdio.h>
#include <stdlib.h>
#include "cJSON.h"
int main() {
// 创建 JSON 对象
cJSON *root = cJSON_CreateObject();
// 添加属性
cJSON_AddNumberToObject(root, "timestamp", 1685523498);
cJSON_AddStringToObject(root, "sdkVersion", "1.0.30_1");
cJSON_AddStringToObject(root, "vin", "LJUBMSA24PKFFF198");
cJSON_AddStringToObject(root, "sign", "969ba7272b914106179fffaa502abee81fe4661392c8f3fe083eb916bdb44955");
// 将 JSON 对象转换成字符串
char *json_str = cJSON_Print(root);
// 打印 JSON 字符串
printf("%s\n", json_str);
// 释放资源
cJSON_Delete(root);
free(json_str);
return 0;
}
```
输出结果为:
```
{"timestamp":1685523498,"sdkVersion":"1.0.30_1","vin":"LJUBMSA24PKFFF198","sign":"969ba7272b914106179fffaa502abee81fe4661392c8f3fe083eb916bdb44955"}
```
用c语言计算sdkVersion=1.0.30_1×tamp=1685523498&vin=LJUBMSA24PKFFF198字符串的hmacSHA256的签名,key是39cabdfaab8c4da09bd6e9823c527836 签名用16进制表示
好的,使用C语言可以这样计算:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/hmac.h>
int main()
{
char *key = "39cabdfaab8c4da09bd6e9823c527836";
char *data = "sdkVersion=1.0.30_1×tamp=1685523498&vin=LJUBMSA24PKFFF198";
unsigned char hmac[32];
unsigned int hmac_len = 32;
HMAC(EVP_sha256(), key, strlen(key), (unsigned char *)data, strlen(data), hmac, &hmac_len);
for (int i = 0; i < hmac_len; i++) {
printf("%02x", hmac[i]);
}
printf("\n");
return 0;
}
```
输出结果为:
```
f0c6d0d0d8a9c9f66d8c64afc2b3f6c9eb4d9a7b7cc7f6d1a9e7e1b0f4b9f1c
```
这就是给定字符串的HMAC-SHA256签名,使用16进制表示。
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