2017年6月13日
一.基本原理：通过app端和appServer一套约定(协议)来实现安全认证【主要是在请求header头里面添加制定参数来实现】，实现拦截功能主要在appServer端实现。
1.目的：减轻服务器端攻击概率，防止链接被劫持访问，防止重复提交等。
二.实现
1.主要约定了如下几个key
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2.常见场景流程图
2.1 app登录流程
image.png
2.2sign校验过程
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3.代码实现
3.1相关宏定义
//安全性相关key (header默认会变成小写)
#define server_key @"salt" //服务端跟客户端一起约定的特定图片，由特定图片计算出的MD5值(其实是后端给的图片)
#define token_key @"token" //客户端登录成功后服务端返回的安全令牌，用于校验接口访问的合法性，【一般登录成功后，正确情况下都不变】
#define guid_key @"guid" //客户端请求链接唯一参数,类似uuid,每次请求都需要重新获取,每次都不一样类似时间戳的概念
#define submitToken_key @"submittoken" //客户端提交表单的安全令牌；（只有post的时候才提交），防止重复提交用。 header默认会变小写
#define client_sign_key @"sign" //生成规则
#define deviceNumber_key @"devicenumber" //客户端设备号
#define obligateToken_key @"obligatetoken" //服务端预留Token,免登录用
#define apiCode_key @"apiCode" //过渡版本，区分新老版本用的 值为1后台就校验，以后后台会去掉
3.2请求设置相关header参数
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
//设置header参数
[QQRequest setHeaderParams:param withManager: manager reuestMode:getReqMode];
+ (void)setHeaderParams:(NSDictionary*)param withManager: (AFHTTPRequestOperationManager *)manager reuestMode:(NSString*)mode
{
NSMutableDictionary *dic = [NSMutableDictionary dictionaryWithDictionary:param];
//设置header参数
NSString *key = apiCode_key;
NSString *value = @"1";
[manager.requestSerializer setValue:value forHTTPHeaderField:key];
[dic setObject:value forKey:key];
key = guid_key;
value = [HuConfigration getGuidKey];
if (value.length > 0) {
[manager.requestSerializer setValue:value forHTTPHeaderField:key];
[dic setObject:value forKey:key];
}
key = token_key;
value = [kUserDefaults objectForKey:key] ?: @"";
if (value.length <= 0) {
value = [kUserDefaults objectForKey:obligateToken_key];
}
if (value.length > 0) {
[manager.requestSerializer setValue:value forHTTPHeaderField:key];
[dic setObject:value forKey:key];
}
key = deviceNumber_key;
value = [[HFDeviceInfo sharedHFDeviceInfo] getDeviceUUID] ?: @"";
if (value.length > 0) {
[manager.requestSerializer setValue:value forHTTPHeaderField:key];
[dic setObject:value forKey:key];
}
if ([mode isEqualToString:postReqMode]) {
key = submitToken_key;
value = [kUserDefaults objectForKey:key] ?: @"";
if (value.length > 0) {
[manager.requestSerializer setValue:value forHTTPHeaderField:key];
[dic setObject:value forKey:key];
}
}
key = client_sign_key;
NSString *tmp = [HuConfigration getUrlParamsFormatString:dic];
NSString *serverKey = [HuConfigration getServerKey];
if (value.length > 0) {
value = [[NSString stringWithFormat:@"%@&%@=%@", tmp, server_key, serverKey] MD5];
[manager.requestSerializer setValue:value forHTTPHeaderField:key];
}
// NSLog(@"wy_sendParam=%@&%@=%@",tmp,server_key,serverKey);
}
+ (NSString *)getGuidKey
{
NSString *res = [NSUUID UUID].UUIDString;
return res;
}
- (NSString*)getDeviceUUID
{
NSString *strUUID = [SSKeychain passwordForService:kSSToolkitTestsServiceName account:kSSToolkitTestsAccountName];
if ([strUUID length] <= 0) {
CFUUIDRef uuidRef = CFUUIDCreate(kCFAllocatorDefault);
strUUID = (NSString *)CFBridgingRelease(CFUUIDCreateString(kCFAllocatorDefault, uuidRef));
[SSKeychain setPassword:strUUID forService:kSSToolkitTestsServiceName account:kSSToolkitTestsAccountName];
}
return strUUID;
}
3.3 若回包中headre有新的值，更新
[manager POST:url parameters:param success:^(AFHTTPRequestOperation *operation, id responseObject) {
//设置新的header值
[QQRequest setNewHeaderDataFromResponse:operation];
[QQRequest handleResponse:responseObject HUD:HUD success:success error:error];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
//设置新的header值
[QQRequest setNewHeaderDataFromResponse:operation];
}];
//设置新的header值
+ (void)setNewHeaderDataFromResponse:(AFHTTPRequestOperation *)operation
{
NSDictionary *responseHeaders = operation.response.allHeaderFields;
NSString *key = token_key;
NSString *value = responseHeaders[key];
if (value.length > 0) {
[kUserDefaults setObject:value forKey:key];
// NSLog(@"wy_new_%@=%@",key,responseHeaders[key]);
}
key = submitToken_key;
value = responseHeaders[key];
if (value.length > 0) {
[kUserDefaults setObject:value forKey:key];
// NSLog(@"wy_new_%@=%@",key,responseHeaders[key]);
}
key = obligateToken_key;
value = responseHeaders[key];
if (value.length > 0) {
[kUserDefaults setObject:value forKey:key];
// NSLog(@"wy_new_%@=%@",key,responseHeaders[key]);
}
}
3.4 安全认证相关参数处理
+ (void)handleResponse:(NSDictionary *)dict
HUD:(MBProgressHUD *)HUD
success:(SuccessBlock)success
error:(ErrorBlock)error
{
Boolean successFlag = [dict[@"success"] boolValue];
if (!successFlag) {
BOOL needAlertError = [QQRequest handleSecurityError:dict];
if (needAlertError) {
NSString *string = dict[@"errMsg"] ? dict[@"errMsg"] : @"网络异常";
HUD.detailsLabelText = string;
HUD.detailsLabelFont = [UIFont systemFontOfSize:15 * kFontScale];
HUD.mode = MBProgressHUDModeCustomView;
[HUD hide:YES afterDelay:2];
}
if (error) {
error(dict);
}
return;
}
if (success) {
[HUD hide:YES];
success(dict);
}
}
//处理安全性相关错误
+ (BOOL)handleSecurityError:(NSDictionary*)dic
{
BOOL needAlertError = YES;
NSString *errCode = [HuConfigration stringValue:dic[@"errCode"]];
BOOL needBackToLoginPage = NO;
if ([errCode isEqualToString:@"api_001"]){
//submitToken失效,请重新登录
// needBackToLoginPage = YES;
}else if ([errCode isEqualToString:@"api_002"]){
//不是同一设备，请重新登录
needBackToLoginPage = YES;
}else if ([errCode isEqualToString:@"api_003"]){
//sign无效，请重新登录
// needBackToLoginPage = YES;
}else if ([errCode isEqualToString:@"api_004"]){
//guid失效，请重新登录
// needBackToLoginPage = YES;
}else if ([errCode isEqualToString:@"api_005"]){
//非法参数，请重新请求
}else if ([errCode isEqualToString:@"api_006"]){
//token失效，请重新请求
NSString *value = [kUserDefaults objectForKey:obligateToken_key];
NSDictionary *param = @{obligateToken_key:value};
NSString *funItem = HuFuncItem_getToken;
NSString *urlString = [NSString stringWithFormat:@"%@/%@",quanQaunURL,funItem];
[Request requestAppServerCommon:param urlString:urlString view:nil reuestMode:getReqMode funItem:funItem success:^(NSDictionary *dic) {
//请求失败重新退出登录
if (dic[@"success"] && [dic[@"success"] boolValue] == NO) {
[HuConfigration backToLoginPage];
}
} error:^(NSDictionary *dic) {
//请求失败重新退出登录
if (dic[@"success"] && [dic[@"success"] boolValue] == NO) {
[HuConfigration backToLoginPage];
}
TRACELOG(@"%@",dic[@"errMsg"] ? dic[@"errMsg"] : @"网络异常");
} failure:^{
TRACELOG(@"failure");
}];
}
if (needBackToLoginPage) {
[HuConfigration backToLoginPage];
}
return needAlertError;
}
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