/// <summary>
/// 请求登录第三方系统
/// </summary>
/// <returns></returns>
public IActionResult RedirectToSite(RedirectToSiteRequestModel data)
{
/*
* 1.检查用户是否登录
* 2.检查是否存在SSO中的UserToken
* 若不存在，则请求 sso Authentication/AuthRedirectToSite 获取UserToken
* 3.判断UserToken
* 若不存在，则返回认证失败
* 若存在，则重定向到 sso Authentication/RedirectToSite
* */
//1.检查用户是否登录
if (!loginHelper.IsLogin(HttpContext))
{
return(Redirect(ssoConfigs.AuthFail));
}
var userIdClaim = HttpContext.User.Claims.FirstOrDefault(x => x.Type == SessionConstants.UserIdScheme);
var userTokenClaim = HttpContext.User.Claims.FirstOrDefault(x => x.Type == SessionConstants.UserTokenScheme);
var userId = userIdClaim == null ? "" : userIdClaim.Value;
var userToken = userTokenClaim == null ? "" : userTokenClaim.Value;
var mapping = siteContext.UserMapping.FirstOrDefault(x => x.UserId == int.Parse(userId));
var ssoUserId = mapping == null ? 0 : mapping.SsoUserId;
//检查 userId
if (string.IsNullOrWhiteSpace(userId))
{
return(Redirect(ssoConfigs.AuthFail));
}
//2.检查 UserToken
if (string.IsNullOrWhiteSpace(userToken))
{
var siteToken = ssoConfigs.SiteToken;
var requestModel = new AuthRedirectToSiteRequesModel()
{
UserId = int.Parse(userId),
SsoUserId = ssoUserId,
TargetUrl = data.TargetUrl,
FailUrl = ssoConfigs.AuthFail
};
var responseStr = httpPostHelper.Send(ssoConfigs.AuthRedirectToSite, JsonConvert.SerializeObject(requestModel));
var responseObject = JsonConvert.DeserializeObject <AuthRedirectToSiteResponseModel>(responseStr);
if (responseObject == null || !responseObject.Success || string.IsNullOrWhiteSpace(responseObject.UserToken))
{
return(Redirect(ssoConfigs.AuthFail));
}
userToken = responseObject.UserToken;
}
string url = $"{ssoConfigs.RedirectToSite}?AppKey={ssoConfigs.AppKey}&UserToken={userToken}&UserId={userId}&SsoUserId={ssoUserId}&TargetUrl={data.TargetUrl}&FailUrl={ssoConfigs.AuthFail}";
return(Redirect(url));
}
/// <summary>
/// 获取登录用户的UserToken
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public AuthRedirectToSiteResponseModel AuthRedirectToSite()
{
/*
* 1.验证 AppKey、签名
* 2.验证 UserToken
* a.有SsoUserId，则根据SsoUserId 加上 SourceSiteConfigId、TargerSiteConfigId 获取用户信息
* b.无SsoUserId，则根据 UserId、SourceSiteCofnigId 获取用户信息
* 3.向请求 client 发送 AuthCallBack 回调验证，确认此请求是正常请求还是别人伪造的请求
* 若为伪造的请求，则直接返回请求认证失败信息以及提示，终止请求
* 4.若第2步中，获取不到用户信息，则创建 User 信息
* 5.返回验证成功信息，以及UserToken
* */
AuthRedirectToSiteRequesModel data = null;
var appKey = HttpContext.Request.Headers[HttpHeaders.AppKey];
var disgest = HttpContext.Request.Headers[HttpHeaders.Disgest];
var reader = new StreamReader(Request.Body);
var bodyStr = reader.ReadToEnd();
data = JsonConvert.DeserializeObject <AuthRedirectToSiteRequesModel>(bodyStr);
#region 验证签名
byte[] body = Encoding.UTF8.GetBytes(bodyStr);
if (!computeHashHelper.IsComputeHash(disgest, body))
{
return(new AuthRedirectToSiteResponseModel()
{
Success = false,
Code = 1,
Message = "ComputeHash wrong."
});
}
#endregion
#region 验证 AppKey
//#TODO 后续需要将 SiteConfig 缓存起来，不要每次查询
var siteConfig = siteContext.SiteConfig.FirstOrDefault(x => x.AppKey == appKey);
if (siteConfig == null)
{
return(new AuthRedirectToSiteResponseModel()
{
Success = false,
Code = 2,
Message = "AppKey wrong."
});
}
#endregion
#region 验证跳转地址
Uri TargetUrl = new Uri(data.TargetUrl);
var tagerHost = TargetUrl.Authority.ToUpper();
//#TODO 后续需要将 SiteConfig 缓存起来，不要每次查询
var tagerSiteConfig = siteContext.SiteConfig.FirstOrDefault(x => x.Host == tagerHost);
if (tagerSiteConfig == null)
{
return(new AuthRedirectToSiteResponseModel()
{
Success = false,
Code = 3,
Message = "TargetUrl wrong."
});
}
#endregion
#region 验证用户是否存在，不存在则新增
UserMapping userMapping = data.SsoUserId > 0 ? siteContext.UserMapping.FirstOrDefault(x => x.SsoUserId == data.SsoUserId && (x.SourceSiteConfigId == siteConfig.Id || x.SourceSiteConfigId == tagerSiteConfig.Id))
: siteContext.UserMapping.FirstOrDefault(x => x.UserId == data.UserId && x.SourceSiteConfigId == siteConfig.Id);
if (userMapping == null)
{
//#TODO 需要事物控制，如果回调认证失败，需要回滚
userMapping = new UserMapping()
{
UserId = data.UserId,
SourceSiteConfigId = siteConfig.Id,
TargetSiteConfigId = tagerSiteConfig.Id,
Token = Guid.NewGuid()
};
siteContext.UserMapping.Add(userMapping);
siteContext.SaveChanges();
//#TODO 去 client 获取用户基本信息
var user = new User()
{
SsoUserId = userMapping.SsoUserId
};
siteContext.User.Add(user);
siteContext.SaveChanges();
#region 回调验证
var callBackRequest = new AuthCallbackRequestModel()
{
AuthType = AuthTypeEnum.RedirectToSite,
SsoUserId = userMapping.SsoUserId,
UserId = userMapping.UserId
};
var postData = JsonConvert.SerializeObject(callBackRequest);
var resrponseStr = httpPostHelper.Send(siteConfig.AuthCallBack, siteConfig, postData);
var reswponseObject = JsonConvert.DeserializeObject <AuthCallbackResponseModel>(resrponseStr);
if (reswponseObject == null || !reswponseObject.Success)
{
return(new AuthRedirectToSiteResponseModel()
{
Success = false,
Code = 4,
Message = "AuthCallback wrong."
});
}
#endregion
}
#endregion
return(new AuthRedirectToSiteResponseModel()
{
Success = true,
Code = 0,
UserToken = userMapping.Token.ToString()
});
}
