我已经为此提出了另一种解决方案。这仍然与 nginx 执行 NTLM 不同（如果 nginx 团队曾经实现这一点会很好）。但是，就目前而言，我所做的对我们有用。
我编写了一些使用加密 cookie 的 lua 代码。加密的 cookie 包含用户的 id、他认证的时间和他认证的 ip 地址。我在这里附上这些东西以供参考。它没有经过完善，但也许您可以使用它来开发自己的类似方案。
基本上，它的工作原理是：
- 如果 cookie 不可用或者过期或无效，nginx 会向后端 IIS 应用程序发出服务调用（预授权），并传递客户端的 IP 地址，然后将客户端重定向到我拥有的 IIS Web 应用程序“ Windows 身份验证”已打开。后端 IIS 应用程序的预身份验证服务会生成一个 GUID，并将该 GUID 的条目存储在 db 中，以及一个指示此 GUID 即将进行身份验证的标志。
- 浏览器由 nginx 重定向到传递 GUID 的身份验证器应用程序。
- IIS 应用程序通过 Windows 身份验证对用户进行身份验证，并使用用户 ID 和验证时间更新该 GUID 和客户端 IP 地址的数据库记录。
- IIS 应用程序将客户端重定向回原始请求。
- nginx lua 代码拦截此调用并再次对 IIS 应用程序进行后门服务调用（身份验证后），并询问用户 ID 和身份验证时间。此信息设置在加密的 cookie 中并发送到浏览器。请求被允许通过，同时 REMOTE_USER 被发送。
- 浏览器的后续请求传递 cookie，nginx lua 代码看到有效的 cookie 并通过传递 REMOTE_USER 请求标头直接代理请求（当然不需要再次验证）。
access.lua：
local enc = require("enc");
local strings = require("strings");
local dkjson = require("dkjson");
function beginAuth()
local headers = ngx.req.get_headers();
local contentTypeOriginal = headers["Content-Type"];
print( contentTypeOriginal );
ngx.req.set_header( "Content-Type", "application/json" );
local method = ngx.req.get_method();
local body = "";
if method == "POST" then
local requestedWith = headers["X-Requested-With"];
if requestedWith ~= nil and requestedWith == "XMLHttpRequest" then
print( "bailing, won't allow post during re-authentication." );
ngx.exit(ngx.HTTP_GONE); -- for now, we are NOT supporting a post for re-authentication. user must do a get first. cookies can't be set on these ajax calls when redirecting, so for now we can't support it.
ngx.say("Reload the page.");
return;
else
print( "Attempting to handle POST for request uri: " .. ngx.var.uri );
end
ngx.req.read_body();
local bodyData = ngx.req.get_body_data();
if bodyData ~= nil then
body = bodyData;
end
end
local json = dkjson.encode( { c = contentTypeOriginal, m = method, d = body } );
local origData = enc.base64encode( json );
local res = ngx.location.capture( "/preauth", { method = ngx.HTTP_POST, body = "{'clientIp':'" .. ngx.var.remote_addr .. "','originalUrl':'" .. ngx.var.FrontEndProtocol .. ngx.var.host .. ngx.var.uri .. "','originalData':'" .. origData .. "'}" } );
if contentTypeOriginal ~= nil then
ngx.req.set_header( "Content-Type", contentTypeOriginal );
else
ngx.req.clear_header( "Content-Type" );
end
if res.status == 200 then
ngx.header["Access-Control-Allow-Origin"] = "*";
ngx.header["Set-Cookie"] = "pca=guid:" .. enc.encrypt( res.body ) .. "; path=/"
ngx.redirect( ngx.var.authurl .. "auth/" .. res.body );
else
ngx.exit(res.status);
end
end
function completeAuth( cookie )
local guid = enc.decrypt( string.sub( cookie, 6 ) );
local contentTypeOriginal = ngx.header["Content-Type"];
ngx.req.set_header( "Content-Type", "application/json" );
local res = ngx.location.capture( "/postauth", { method = ngx.HTTP_POST, body = "{'clientIp':'" .. ngx.var.remote_addr .. "','guid':'" .. guid .. "'}" } );
if contentTypeOriginal ~= nil then
ngx.req.set_header( "Content-Type", contentTypeOriginal );
else
ngx.req.clear_header( "Content-Type" );
end
if res.status == 200 then
local resJson = res.body;
-- print( "here a1" );
-- print( resJson );
local resTbl = dkjson.decode( resJson );
if resTbl.StatusCode == 0 then
resTbl = resTbl.Result;
local time = os.time();
local sessionData = dkjson.encode( { u = resTbl.user, t = time, o = time } );
ngx.header["Set-Cookie"] = "pca=" .. enc.encrypt( sessionData ) .. "; path=/"
ngx.req.set_header( "REMOTE_USER", resTbl.user );
if resTbl.originalData ~= nil and resTbl.originalData ~= "" then
local tblJson = enc.base64decode( resTbl.originalData );
local tbl = dkjson.decode( tblJson );
if tbl.m ~= nil and tbl.m == "POST" then
ngx.req.set_method( ngx.HTTP_POST );
ngx.req.set_header( "Content-Type", tbl.c );
ngx.req.read_body();
ngx.req.set_body_data( tbl.d );
end
end
else
ngx.log( ngx.ERR, "error parsing json " .. resJson );
ngx.exit(500);
end
else
print( "error completing auth." );
ngx.header["Set-Cookie"] = "pca=; path=/; Expires=Thu, 01 Jan 1970 00:00:00 GMT; token=deleted;"
print( res.status );
ngx.exit(res.status);
end
end
local cookie = ngx.var.cookie_pca;
print( cookie );
if cookie == nil then
beginAuth();
elseif strings.starts( cookie, "guid:" ) then
completeAuth( cookie );
else
-- GOOD TO GO...
local json = enc.decrypt( cookie );
local d = dkjson.decode( json );
local now = os.time();
local diff = now - d.t;
local diffOriginal = 0;
if d.o ~= nil then
diffOriginal = now - d.o;
end
if diff > 3600 or diffOriginal > 43200 then
beginAuth();
elseif diff > 300 then
print( "regenerating new cookie after " .. tostring( diff ) .. " seconds." );
local sessionData = dkjson.encode( { u = d.u, t = now, o = d.t } );
ngx.header["Set-Cookie"] = "pca=" .. enc.encrypt( sessionData ) .. "; path=/"
end
ngx.req.set_header( "REMOTE_USER", d.u );
end
strings.lua:
local private = {};
local public = {};
strings = public;
function public.starts(String,Start)
return string.sub(String,1,string.len(Start))==Start
end
function public.ends(String,End)
return End=='' or string.sub(String,-string.len(End))==End
end
return strings;
enc.lua：
-- for base64, try something like: http://lua-users.org/wiki/BaseSixtyFour
local private = {};
local public = {};
enc = public;
local aeslua = require("aeslua");
private.key = "f8d7shfkdjfhhggf";
function public.encrypt( s )
return base64.base64encode( aeslua.encrypt( private.key, s ) );
end
function public.decrypt( s )
return aeslua.decrypt( private.key, base64.base64decode( s ) );
end
return enc;
示例 nginx 配置：
upstream dev {
ip_hash;
server app.server.local:8080;
}
set $authurl http://auth.server.local:8082/root/;
set $FrontEndProtocol https://;
location / {
proxy_pass http://dev/;
proxy_set_header Host $host;
proxy_redirect default;
proxy_http_version 1.1;
proxy_set_header Connection "";
proxy_set_header X-Real-IP $remote_addr;
proxy_buffers 128 8k;
access_by_lua_file conf/lua/app/dev/access.lua;
}