package com.repair.common.utils;

import java.util.HashMap;
import java.util.Map;


public class EncryptionUtil {


    private static final int MAX_JSON_STRING = 40;

    /**
     * 将需要加密的字段分批加密
     *
     * @param jsonString
     * @param publicKey
     * @return
     * @throws Exception
     */
    public Map<Object, Object> encryption(String jsonString, String publicKey) throws Exception {
        int length = jsonString.length();
        int offset = 0;
        int i = 0;
        HashMap<Object, Object> map = new HashMap<>();
//        判断字符串长度是否大于40，大于就截取前40位，分批加密
        while (length - offset > 0) {
            if (length - offset > MAX_JSON_STRING) {
                String substring = jsonString.substring(offset, offset + MAX_JSON_STRING);
                String encrypt = RSAUtils.encrypt(substring, RSAUtils.getPublicKey(publicKey));
                map.put(i, encrypt);
            } else {
                String substring = jsonString.substring(offset,length);
                String encrypt = RSAUtils.encrypt(substring, RSAUtils.getPublicKey(publicKey));
                map.put(i, encrypt);
            }
            i++;
            offset = i * MAX_JSON_STRING;
        }
        return map;
    }
}