//
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// EZHttpUtil.m
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// EZOpenSDKDemo
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//
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// Created by 陈嘉乐 on 2021/2/26.
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// Copyright © 2021 hikvision. All rights reserved.
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//
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#import "EZHttpUtil.h"
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#import <Foundation/Foundation.h>
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#import <CommonCrypto/CommonDigest.h>
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#define APP_KEY @"HDL-HOME-APP-TEST"
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#define SECRET_KEY @"WeJ8TY88vbakCcnvH8G1tDUqzLWY8yss"
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@implementation EZHttpUtil
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+(NSMutableDictionary *)GetSignRequestDictionary:(NSMutableDictionary *)params{
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if(params == NULL){
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params =[NSMutableDictionary dictionary];
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}
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[params setValue:APP_KEY forKey:@"appKey"];
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[params setValue:@"" forKey:@"timestamp"];
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//1.对KEY升序
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NSArray *keyArray = [params allKeys];
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NSArray *sortKeyArray = [keyArray sortedArrayUsingComparator:^NSComparisonResult(id _Nonnull obj1, id _Nonnull obj2) {
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return [obj1 compare:obj2 options:NSNumericSearch];
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}];
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//2.2 拼接按URL键值对
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NSString *newString = @"";
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for(NSString *key in sortKeyArray){
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if(params[key] != NULL){
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NSString *valueStr = params[key];
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//检测当前参数是否需要参与校验
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if([self IfValueNeedSign:valueStr]){
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newString = [newString stringByAppendingString:[NSString stringWithFormat:@"%@=%@&", key,valueStr]];
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}
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}
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}
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//2.3 拼接SECRET_KEY
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newString = [newString substringToIndex:[newString length] - 1];
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newString = [ newString stringByAppendingString: SECRET_KEY];
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//2.4 MD5转换+转小写
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if(newString == nil || newString == NULL){
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newString = @"";
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}
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NSString* signstr = [self signMD5Encrypt:newString];
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[params setValue:signstr forKey:@"sign"];
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return params;
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}
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+ (NSString*)signMD5Encrypt:(NSString *)str
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{
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const char *cStr = [str UTF8String];
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unsigned char digest[CC_MD5_DIGEST_LENGTH];
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CC_MD5( cStr, strlen(cStr),digest );
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NSMutableString *result = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
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for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)
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[result appendFormat:@"%02x", digest[i]];
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return result;
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}
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/// <summary>
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/// 判断当前值是否需要参与签名，保持跟云端一致
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/// 空字符串不参与
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/// 数组,集合,对象不参与
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/// </summary>
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/// <param name="valueStr"></param>
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/// <returns></returns>
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+(bool)IfValueNeedSign:(NSString *)valueStr{
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if (( (valueStr == nil || [valueStr isKindOfClass:[NSNull class]] || valueStr.length == 0))//判空字符
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|| ([[valueStr substringToIndex:1] isEqual:@"{"])//判断是否为对象
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|| ([[valueStr substringToIndex:1] isEqual:@"["])//判断是否为数组
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) {
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return false;
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}
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return true;
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}
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@end
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