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  • What is a good way of checking to see if a particular user may access a particular file?

    - by Rising Star
    I am working on application which runs as a special unprivileged user. I would like to be able to easily check to see if the user can read a given file. It seems like this should be easy, even when I go into the file in Windows Explorer and see that the read permission is checked, it sometimes seems that there is still something preventing the user from reading the file (such as a parent directory that the user cannot browse) when I try to read it as the user programmatically. The user has no console logon permission, so I can't just log in as the user and try to read the file. So... If I want to know, "Does UserBob have access to file c:\specialPath\specialFile, what is an easy way to find out? BTW, my environment is Windows Server 2003.

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  • Securing Coredata objects

    - by Abraham Durairaj
    I am working on an application which has got some sensitive information. I am aware that it would be difficult for a layman to hack into iphone to get the information. If I use SQLite directly I have something called SQLite Cipher to encrypt / encode the database. Is there anyway where I can have the same way of encrypting the coredata so it makes it hard for hackers to get into the data. Can someone shed some light on this? Thanks in Advance

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  • Computer Invisible On Domain

    - by Giawa
    Good afternoon, I'm sorry that this isn't a programming question specifically, but stackoverflow has been great at answering questions in the past, so I thought I'd give it a shot. One of our Linux users attempted to install Cygwin on our Windows Server 2008 Domain Controller. Now it is no longer possible to browse the domain and see all of the computers. For example, \\my_domain_name will just bring up a username/password dialog box (that will not accept any username or password, even the domain administrator) and no computers will ever be listed. However, I can still connect to computers based on their name or IP address. So \\eridanus or \\192.168.1.85 still work to connect to the shared directories of computers on our network. Does anyone know where I can find these settings? and how I can fix this problem? Thanks, Giawa

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  • How to implement Administrator rights in Java Application?

    - by Yatendra Goel
    I am developing a Data Modeling Software that is implemented in Java. This application converts the textual data (stored in a database) to graphical form so that users can interpret the data in a more efficient form. Now, this application will be accessed by 3 kinds of persons: 1. Managers (who can fill the database with data and they can also view the visual form of the data after entering the data into the database) 2. Viewers (who can only view the visual form of data that has been filled by managers) 3. Administrators (who can create and manage other administrators, managers and viewers) Now, how to implement 3 diff. views of the same application. Note: Managers, Viewers and Administrators can be located in any part of the world and should access the application through internet. One idea that came in my mind is as follows: Step1: Code all the business logic in EJBs so that it can be used in distributed environment (means which can be accessed by several users through internet) Step2: Code 3 Swing GUI Clients: One for administrators, one for managers and one for viewers. These 3 GUI clients can access business logic written in EJBs. Step3: Distribute the clients corresponding to their users. For instance, manager client to managers. =================================QUESTIONS======================================= Q1. Is the above approach is correct? Q2. This is very common functionality that various softwares have. So, Do they implement this kind of functionality through this way or any other way? Q3. If any other approach would be more better, then what is that approach?

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  • Deny http access to a directory, allow access from WordPress plugin

    - by luke
    Hey. I need to prevent direct access to http://www.site.com/wp-content/uploads/folder/something.pdf through the browser. However the Download Monitor plugin I am using, which allows logged in users to download the file, needs to be able to work. Trying Order Allow,Deny Deny from all Allow from all but the download links do not now work... even though (I think) they are links produced by the script e.g. http://www.site.com/wp-content/plugins/download-monitor/download.php?id=something.pdf Enter that in the address bar and you correctly get a WordPress message, 'You must be logged in to download this file.' However, if someone knows the URL where the file was uploaded http://www.site.com/wp-content/uploads/folder/something.pdf they can still access it directly. I don't know how (guesswork?) they would find the direct URL anyway, but the client wants it stopped! Thanks for any help.

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  • Is it immoral to put a captcha on a login form?

    - by azkotoki
    In a recent project I put a captcha test on a login form, in order to stop possible brute force attacks. The immediate reaction of other coworkers was a request to remove it, saying that it was inapropiate for that purpose, and that it was quite exotic to see a captcha in that place. I've seen captcha images on signup, contact, password recovery forms, etc. So I personally don't see inapropiate to put a captcha also on a place like that. Well, it obviously burns down usability a little bit, but it's a matter of time and getting used to it. With the lack of a captcha test, one would have to put some sort of blacklist / account locking mechanism, which also has some drawbacks. Is it a good choice for you? Am I getting somewhat captcha-aholic and need some sort of group therapy? Thanks in advance.

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  • arbitrary input from stdin to shell

    - by python_noob
    So I have this existing command that accepts a single argument, but I need something that accepts the argument over stdin instead. A shell script wrapper like the following works, but as I will be allowing untrusted users to pass arbitrary strings on stdin, I'm wondering if there's potential for someone to execute arbitary commands on the shell. #!/bin/sh $CMD "`cat`" Obviously if $CMD has a vulnerability in the way it processes the argument there's nothing I can do, so I'm concerned stuff like this: Somehow allow the user to escape the double quotes and pass input into argument #2 of $CMD Somehow cause another arbitary command to run

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  • Determining when or when not to escape output

    - by Ygam
    I have a page, where I have approximately 90 items I need to output. Most of them are object properties (I am using ORM so these objects map to my database tables). But the question is, do I have to escape each of those 90 outputs by applying functions to each (in my case, the htmlspecialchars)? Wouldn't that add a bit of an overhead (calling a single function 90 times)?

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  • MS Access: Permission problems with views

    - by Keith Williams
    "I'll use an Access ADP" I said, "it's only a tiny project and I've got better things to do", I said, "I can build an interface really quickly in Access" I said. </sarcasm> Sorry for the rant, but it's Friday, I have a date in just under two hours, and I'm here late because this just isn't working - so, in despair, I turn to SO for help. Access ADP front-end, linked to a SQL Server 2008 database Using a SQL Server account to log into the database (for testing); this account is a member of the role, "Api"; this role has SELECT, EXECUTE, INSERT, UPDATE, DELETE access to the "Api" schema The "Api" schema is owned by "dbo" All tables have a corresponding view in the Api schema: e.g. dbo.Customer -- Api.Customers The rationale is that users don't have direct table access, but can deal with views as if they were tables I can log into SQL using my test login, and it works fine: no access to the tables, but I can select, insert, update and delete from the Api views. In Access, I see the views, I can open them, but whenever I try to insert or update, I get the following error: The SELECT permission was denied on the object '[Table name which the view is using]', database '[database name]', schema 'dbo' Crazy as it sounds, Access seems to be trying to access the underlying table rather than the view. Any ideas?

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  • Automatic User Authentication Framework for Controllers in ASP.NET MVC?

    - by Austin
    In rails I could do something like this to make sure a user is authenticated before accessing an action in the controller: before_filter :checked_logged_in, :only => [:edit, :update] I was wondering if ASP.NET MVC had something similar or if there was a framework out there that could essentially do something like the following: For certain methods with actions that take a certain parameter, I want to point the action to a method, check to see if the user owns that object, and if so, proceed to the controller action. If not, I want to redirect him to another action where I can show him he has invalid credentials. So basically I am looking for a sort of "before_filter." Anyone know of anything out there that can do this? Thanks!

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  • Can I use encrypt web.config with a custom protection provider who's assembly is not in the GAC?

    - by James
    I have written a custom protected configuration provider for my web.config. When I try to encrypt my web.config with it I get the following error from aspnet_iisreg aspnet_regiis.exe -pef appSettings . -prov CustomProvider (This is running in my MSBuild) Could not load file or assembly 'MyCustomProviderNamespace' or one of its dependencies. The system cannot find the file specified. After checking with the Fusion log, I confirm it is checking both the GAC, and 'C:/WINNT/Microsoft.NET/Framework/v2.0.50727/' (the location of aspnet_iisreg). But it cannot find the provider. I do not want to move my component into the GAC, I want to leave the custom assembly in my ApplicationBase to copy around to various servers without having to pull/push from the GAC. Here is my provider configuration in the web.config. <configProtectedData> <providers> <add name="CustomProvider" type="MyCustomProviderNamespace.MyCustomProviderClass, MyCustomProviderNamespace" /> </providers> </configProtectedData> Has anyone got any ideas?

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  • How to sign XML document or verify XML document signature with C++?

    - by Budda
    Subj. I need to sign/verify in native C++ (no .NET), using private key for signing, public key for verification. I saw few examples on MSDN (http://msdn.microsoft.com/en-us/library/ms761363(VS.85).aspx) that demonstrate how to sign the document with CSP (I don't know what this means). For my case I need to create a "key" from the binary data array... can somebody help me with that? Thank you in advance.

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  • Accessing Identity.AuthenticationType

    - by Tewr
    While implementing a custom authentication type in a wcf service, I'm trying to read the property IIdentity.AuthenticationType using the call Thread.CurrentPrincipal.Identity.AuthenticationType. Unless the account running the service is local administrator, UnauthorizedAccessException is thrown when accessing this property, much like described in this support thread. I can however reset the Thread.CurrentPrincipalobject without hassle, thus altering the Authentication Type - But read it, I cannot. Is running as an administrator the only way here or is there some trick to let the user running the service "just" access this property?

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  • How to remove dangerous characters(ie script tags)?

    - by chobo2
    I am wondering is there any sort of C# class or 3rd party library that removes dangerous characters such as script tags? I know you can use regex but I also know people can write their script tags so many ways that you can fool the regex into thinking it is OK. I also heard that HTML Agility Pack is good so I am wondering is there any script removal class made for it?

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  • Restricting access to records. Is claim-based permissions a good idea.

    - by Vitalik
    in .net Claim-based identity framework If i wanted to restrict users to do an operation (view or edit) on let's say an account, a particular account #123456.(i am talking about business entity, like a bank account.) Is it a good idea to create a claim for each account they can view or edit? Any disadvantages of having a lot of claims in a set? a system admin might have access to all accounts in the system thus creating hundreds of claims (maybe more than one for each account)

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  • How to design service that can provide interface as JAX-WS web service, or via JMS, or as local meth

    - by kevinegham
    Using a typical JEE framework, how do I develop and deploy a service that can be called as a web service (with a WSDL interface), be invoked via JMS messages, or called directly from another service in the same container? Here's some more context: Currently I am responsible for a service (let's call it Service X) with the following properties: Interface definition is a human readable document kept up-to-date manually. Accepts HTTP form-encoded requests to a single URL. Sends plain old XML responses (no schema). Uses Apache to accept requests + a proprietary application server (not servlet or EJB based) containing all logic which runs in a seperate tier. Makes heavy use of a relational database. Called both by internal applications written in a variety of languages and also by a small number of third-parties. I want to (or at least, have been told to!): Switch to a well-known (pref. open source) JEE stack such as JBoss, Glassfish, etc. Split Service X into Service A and Service B so that we can take Service B down for maintenance without affecting Service A. Note that Service B will depend on (i.e. need to make requests to) Service A. Make both services easier for third parties to integrate with by providing at least a WS-I style interface (WSDL + SOAP + XML + HTTP) and probably a JMS interface too. In future we might consider a more lightweight API too (REST + JSON? Google Protocol Buffers?) but that's a nice to have. Additional consideration are: On a smaller deployment, Service A and Service B will likely to running on the same machine and it would seem rather silly for them to use HTTP or a message bus to communicate; better if they could run in the same container and make method calls to each other. Backwards compatibility with the existing ad-hoc Service X interface is not required, and we're not planning on re-using too much of the existing code for the new services. I'm happy with either contract-first (WSDL I guess) or (annotated) code-first development. Apologies if my terminology is a bit hazy - I'm pretty experienced with Java and web programming in general, but am finding it quite hard to get up to speed with all this enterprise / SOA stuff - it seems I have a lot to learn! I'm also not very used to using a framework rather than simply writing code that calls some packages to do things. I've got as far as downloading Glassfish, knocking up a simple WSDL file and using wsimport + a little dummy code to turn that into a WAR file which I've deployed.

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  • Why wouldn't I be able to establish a trust relationship for a SSL/TLS channel?

    - by Abe Miessler
    I have a piece of .NET code that is erroring out when it makes a call to HTTPWebRequest.GetRequestStream. Here is the error message: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. I've read a few things that suggest that I might need a certificate on the machine running the code, but i'm not sure if that's true or how to do it. If I need to get a certificate, how do I do it? Code: var request = (HttpWebRequest)HttpWebRequest.Create(requestUrl); //my url request.Method = StringUtilities.ConvertToString(httpMethod); // Set the http method GET, POST, etc. if (postData != null) { request.ContentLength = postData.Length; request.ContentType = contentType; using (var dataStream = request.GetRequestStream()) { dataStream.Write(postData, 0, postData.Length); } }

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  • Can a proxy server cache SSL GETs? If not, would response body encryption suffice?

    - by Damian Hickey
    Can a (||any) proxy server cache content that is requested by a client over https? As the proxy server can't see the querystring, or the http headers, I reckon they can't. I'm considering a desktop application, run by a number of people behind their companies proxy. This application may access services across the internet and I'd like to take advantage of the in-built internet caching infrastructure for 'reads'. If the caching proxy servers can't cache SSL delivered content, would simply encrypting the content of a response be a viable option? I am considering all GET requests that we wish to be cachable be requested over http with the body encrypted using asymmetric encryption, where each client has the decryption key. Anytime we wish to perform a GET that is not cachable, or a POST operation, it will be performed over SSL.

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  • Does HttpWebRequest automatically take care of certificate validation?

    - by Kevin Pang
    I'm using an HttpWebRequest object to access a web service via an HTTP POST. Part of the requirement is that I: Verify that the URL in the certificate matches the URL I'm posting to Verify that the certificate is valid and trusted Verify that the certificate has not expired Does HttpWebRequest automatically handle that for me? I'd assume that if any of these conditions came up, I'd get the standard "could not establish trust relationship for the SSL/TLS secure channel" exception.

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