csp | Content Security Policy HTTP middleware | Runtime Evironment library
kandi X-RAY | csp Summary
kandi X-RAY | csp Summary
A simple middleware for configuring CSP headers with support for websockets. This middleware was inspired by github.com/unrolled/secure which provides a good way to apply security policy to your HTTP server response headers to help mitigate some common web based XSS attacks. Unfortunately the unrolled/secure CSP configuration is a static string. Combining this with web sockets in dynamic environments where the server may be running behind a reverse proxy or in a Container, means that it is not possible to use the connect-src policy if you also wish to use websockets. This middleware provides just the CSP header, but also supports reading the host value directly out of the HTTP request and configuring the appropriate WS (HTTP) or WSS (TLS) protocol based on the request configuration. If you don't specify a specific CSP policy field, the middleware will not configure a policy for it.
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Top functions reviewed by kandi - BETA
- StarterConfig returns the default configuration .
- Middleware injects the next request to next handler
- New returns a new CSP instance
csp Key Features
csp Examples and Code Snippets
Community Discussions
Trending Discussions on csp
QUESTION
This code receives information from an acquaintance you want to register in editText, and then clicks finButton to save the information you receive as a file called friendlist.txt. However, the Toast message is outputted from the try-catch statement that is currently performed when finButton is pressed. Also, the checkpermission does not work, which is wrapped in a try~catch statement, but does not have output on the logcat.
And manifest.
uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"
uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
is written.
Please let me know the solution. And this content is written with a translator, so the sentence can be strange.
when you press finButton, the logcat is shown below.
The code corresponding to the 116th line is this.
...FileOutputStream outstream = openFileOutput("friendList.txt", Activity.MODE_WORLD_WRITEABLE);
ANSWER
Answered 2021-Jun-16 at 01:47Try with Context.MODE_APPEND or Context.MODE_PRIVATE instead of Activity.MODE_WORLD_WRITEABLE
QUESTION
We receive mp3 voicemails in Gmail. Starting today, all computers using Google Chrome can't play mp3s found in Gmail. This doesn't affect other sites that host mp3s.
Upon further inspection, the console reports:
...ANSWER
Answered 2021-May-29 at 09:56With the Content Security Policy directive media-src https://*.googlevideo.com/videoplayback/, media files from sources different to https://*.googlevideo.com/videoplayback/ can't be played in the / tags embedded into page.
Even you load media by ajax and create tag with blob:-Url, it will be blocked by above CSP.
It's not a browser dependant, that's how CSP is work.
With the current CSP restrictions, mediafiles can be played only in the isolated browsing contexts like </code>/<code><object></code>/<code><embed></code>.</p>
<p>I don't know is GMail made it intentionally or occasionally, but only browser extensions using nested browsing contexts can play media in such conditions.</p>
QUESTION
I have a GreaseMonkey user script that injects some HTML code into a page, and the HTML code is containing some JavaScript which points to an external script, which requires Google Analytics to work. To "bypass" Content Security Policy i injected this code just before :
...ANSWER
Answered 2021-Jun-07 at 20:48It's unclear what you want to achieve. It does not make any sense to change the tag script based in the DOM. Just don't set it in the first place or set it according to your needs.
QUESTION
I want to embed user provided HTML code in my website. The code will be self-contained, and will contain script and style tags. I am planning to block all network calls from the the provided HTML code by using Content Security Policy headers. The code will only be able to access standard libraries like jquery and other standard resources (the same will be specified in the CSP). I want to restrict any communication between the iframe content and the parent domain.
My plan is to use an </code> to embed the content. The user will give an input, and then on clicking a button, an <code>iframe</code> will be rendered with the given input snippet. It will be rendered inline with other content of the page.</p>
<p>I am concerned about the effect of this on the security of my website.</p>
<ol>
<li>Can I make the origin of the iframe <code>null</code>? Or will I have to host my content on a separate domain so that SOP blocks all the network calls to the parent page?</li>
<li>Will I be able to set up CSP for the iframe separately? If yes, can anyone suggest what all attributes the CSP should have?</li>
<li>Can I take the input html and inject it directly to my iframe from the parent page?</li>
</ol>
<p>If there are other alternatives which don't use <code>iframe</code>, which are those?</p>
ANSWER
Answered 2021-Jun-03 at 12:33Can I make the origin of the iframe null? Or will I have to host my content on a separate domain so that SOP blocks all the network calls to the parent page?
You can make the origin of the iframe null if you'll use, for instance, a data:-Url. This will prevent cross-origin requests in modern browsers, but Content Security Policy of parent document will be inherited into iframe in all browsers.
In this case some old browsers (Firefox/WinXP) will spread CSP from the iframe to parent document too.
Will I be able to set up CSP for the iframe separately? If yes, can anyone suggest what all attributes the CSP should have?
You are able to set separate CSP for iframe only if it's loaded via network scheme (http:/https:) - it will be created isolated browsing context. If non-network schemes (data:, blob:, etc) iframe will inherit CSP of parent document.
In case of isolated browsing context you can use any "attributes the CSP" what you need for your specific case.
Pay attention to csp=, sandbox= attributes, these can be useful.
Can I take the input html and inject it directly to my iframe from the parent page?
This is contravert your statement: "I want to restrict any communication between the iframe content and the parent domain.".
Therefore all communications are possible via server only.
If there are other alternatives which don't use iframe, which are those?
Isolated browsing contexts can be created via /, but these are not useful in your case.
QUESTION
I want to capture the web element highlighted in the below screenshot:
I have already tried following options (using absolute as well as relative path):
- submit = driver.find_element_by_xpath("html/body/vra-root/vra-shell/clr-main-container/vra-tabs/nav/ul/li[2]/a").click()
- submit = driver.find_element_by_xpath("//ul[@class='nav']//li[@class='nav-item ng-star-inserted']//a[@id='csp.cs.ui.deployment'] and contains [text()='Deployments']").click()
- submit = driver.find_element_by_xpath("//a[text()='Deployments']").click()
- content = driver.find_element_by_css_selector('a.nav-link').click()
But, everytime I am getting the follwing error message`NoSuchElementException: Message: no such element: Unable to locate element:
I am new to this, any help is appreciated!`
...ANSWER
Answered 2021-May-28 at 19:05This looks like in an iframe, if yes then you can switch it to iframe first like this :
QUESTION
I am creating a C# app that authenticates via a node.js server. I am using RSA for this purpose. I generated a public and private key for the server using crypto. Every time the client connects to the server, it generates a key pair for itself. The client gets the server public key from an endpoint. I have used XML strings as well as PEM strings, but neither of them worked. (using RSACryptoServiceProvider) When the server attempted to decrypt it, it threw an OAEP decoding error. I am trying to decrypt the message with the paired private key.
I have viewed other threads but they were not very helpful.
Here's the code for the server. It encrypts/decrypts with the built-in crypto module. (I have tested this with a node.js client and a node.js server, and it works.)
...ANSWER
Answered 2021-Jan-26 at 14:44There are multiple types of padding, and apparently the encryption is trying to use PKCS1 (I guess), and the decryption defaults to OAEP.
In crypto.privateDecrypt you can set the padding to eg. padding: crypto.constants.RSA_PKCS1_PADDING and it should work.
You should go for OAEP on both ends if possible (and it should be), in which case your Node code is already ok as the default is OAEP, and C# should be set to OAEP too.
Edit: I mixed it up first, but the point is, you can set the padding type on either end, and they must match. :)
QUESTION
I'm making a chess game. I've created a main file with the Tkinter code in a class "Window". In this class, I created a canvas. Then I've created a second file with the name "pieces", where I put the behaviour of the different pieces. In this one, I have a superclass "Pieces", and a subclass "Bishop" (because I haven't created the classes for the other pieces yet)
What I tried first to do, is to create a bishop's icon in the constructor of the class "Bishop". My class "Bishop" has the argument "color", so that, when we create an object "Bishop", we can choose if he's black or white. So I wrote :
...ANSWER
Answered 2021-May-24 at 16:18If you are familiar with Model/View approach of writing code, it will help you find your way around tkinter applications. In such a case you would place all the code relating to views in one class and all the data is managed in the Model class(es).
In your case, you could start with the structure illustrated below and grow from it:
QUESTION
I am creating a short RPG game for my AP CSP project and for some reason when I call the method Element in line 310-313, it just ends the rest of the code in Main (which is all the remaining code in the program). The user is required to press x to continue the game but it skips all of that and auto-fills the user-inputs correctly. Put it short, once you select your element in the code, the program finishes the game by itself, which is not supposed to happen since the user needs to have its input to continue the dialogue.
Aforementioned, the intended output of this code is to complete the dialogue with the user input and user information only. Please help as this is due soon!
...ANSWER
Answered 2021-May-11 at 07:49It looks like you stopped following the pattern that you applied in the beginning. As you'll see, prior to line 310, you have used
QUESTION
I hope someone can explain to me where I have made a mistake. I always thought that when I export a certificate with a private key and import it again, the private key is stable and does not change. Especially across computers.
Now I have been proven wrong and I don't understand it.
Given a certificate Z. Which contains a private key pk. I import this certificate onto a computer C1 and onto a computer C2.
I get the parameters of the private key on both.
...ANSWER
Answered 2021-May-18 at 16:37Basically, the D value doesn't matter, and you're seeing a consequence of that.
"Did you just say the D value doesn't matter? Isn't RSA based on m == modpow(modpow(m, e, n), d, n)?"
Yep, and yep. But the Chinese Remainder Theorem provides for a more efficient implementation for modpow(m, d, n), so no one really bothers with D.
The other thing that's going on, is that when an RSA private key is imported you have a couple of choices: 1) verify that n == (p * q) and the d/dp/dq/qInv make sense given n/e/p/q, fail if they don't, 2) import the key on faith, deal with consequences of inconsistency ("garbage in, garbage out"), 3) do (1) but fix any incorrect data.
OK, so we have the premise of why the values might change (strategy (3)), but why are they actually changing?
Because there are at least two different common answers for D. ("Isn't D unique?" no. "Didn't you say D doesn't matter?" OK, so it matters in computing the CRT parameters, then it stops mattering.)
The original RSA paper defined D as the modular multiplicative inverse of e modulo the Euler totient function of N. The usual symbol for the Euler totient function is the Greek letter phi. Many smart people later, the statement got changed to D being the modular multiplicative inverse of e modulo the Carmichael function of N. The usual symbol for the Carmichael function is the Greek letter lambda.
The difference is sort of a squares-vs-rectangles thing. All D-phi values work for RSA, because e * D-phi === 1 (mod lambda(N)). Since all D-lambda values also work for RSA, but don't adhere to e * D-lambda === 1 (mod phi(N)), the formula got rewritten.
OK, there's the background, so what's happening?
- Windows CAPI (powers RSACryptoServiceProvider on Windows, RSA.Create() on .NET Framework) generates keys using lambda, but preserves the D value across import/export.
- OpenSSL (powers RSA classes on Linux) generates keys using phi, but preserves the D value across import/export.
- Windows CNG (powers RSACng on Windows, RSA.Create() on .NET5/.NET Core on Windows) generates keys using phi, but discards D on import and recomputes it from N/E/P/Q for export.
- (There's some nuance here... I feel like CNG changed to maybe preserve the D value around Windows 10 20H1.)
- I don't remember what Android does (probably OpenSSL behaviors), or what macOS does.
So, my guess is that C1 and C2 are running on different OSes (or different versions of the same OS).
https://github.com/dotnet/runtime/commit/700a07cae19fe64649c2fb4c6c10e6b9aa85dc29 shows how we dealt with it in the test suite for .NET. For application code, my recommendation is to just trust the systems.
QUESTION
I'm not sure how this issue is happening, the key that I'm attempting to pass to the CSP was originally a Base64Encoded string which I've tried passing in using ImportSubjectInfoKey() as well. Each time when debugging I have exported the parameters and I am able to get my public key back as a Base64 string so as far as I know it's a valid key. However once it hits the VerifyData method it breaks with a Bad Key exception. While debugging, I did notice that rsa1.CspKeyContainerInfo was mentioning an error "Exportable: {key does not exist}". Is this where my issue is coming from? I've included the public key below as an XML string if anyone can see an issue.
...ANSWER
Answered 2021-May-17 at 16:15The posted code fails because VerifySignature() doesn't expect the raw data but the hashed data, see also this example from the documentation.
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