实战-打造一个帮你健康打卡的物联网小硬件-实现登陆

#include <ESP8266WiFi.h>

const char *ssid = "SSID";
const char *password = "PWD";

WiFiClient client;

void setupWifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void setup ( void ) { 
  Serial.begin(9600);
  setupWifi();
}

void loop ( void ) {
//
}

#include <Crypto.h>
#include <SHA256.h>

// 定义哈希大小
#define HASH_SIZE 32

// 将 hex 转回 char
char *btoh(char *dest, uint8_t *src, int len)
{
  char *d = dest;
  while (len--)
    sprintf(d, "%02x", (unsigned char)*src++), d += 2;
  return dest;
}

// 使用sha256加密密码
char *crypto_password(char *str)
{
  char hex[256];
  char *msg = str;

  uint8_t result[HASH_SIZE];
  SHA256 sha256Hash;

  sha256Hash.reset();
  sha256Hash.update(msg, strlen(msg));
  sha256Hash.finalize(result, HASH_SIZE);

  return btoh(hex, result, HASH_SIZE);
}

// LIT(Luoyang Institute of Science and Technology) Health Platform
#define CONFIG_LIT_ENDPOINT_LOGIN "http://hmgr.sec.lit.edu.cn/wms/healthyLogin"

#include <ArduinoJson.h>
#include <ESP8266HTTPClient.h>

#include "config.h"

......

StaticJsonDocument<200> login_data;

void litLogin(char *user, char *psw)
{
  char buffer[256];

  Serial.println(buffer);

  login_data["cardNo"] = user;
  login_data["password"] = crypto_password(psw);

  serializeJson(login_data, buffer);

  http.begin(CONFIG_LIT_ENDPOINT_LOGIN); //Specify request destination
  http.addHeader("Content-Type", "application/json");
  int httpCode = http.POST(buffer); //Send the request

  if (httpCode > 0)
  { //Check the returning code

    String payload = http.getString(); //Get the request response payload
    Serial.println(payload);           //Print the response payload
  }

  http.end(); //Close connection
}

void setup()
{
......

  // try to login
  litLogin("USERNAME", "PASSWORD");

}