abac | Attribute based access control for Node.js | Authorization library

At my work, I have a task to search and find solutions to implement the ABAC authorization in our microservices organized in a monorepo. We have some products and we use the concept of realms to organize the different client's data in the same database. Here our requirements are likely:

• An user, which is a manager of his company, can only see data from your company and from your employees.
• The same company can have N places, where each can have a manager. The manager of each place can only see the data from there.

First I thought to build some code to be used in every router of every API to verify the authorization and allow or deny the request. Something like this:

The other thing I thought was to create an API instead of a lib.

So, based on this question, I discovered that ABAC can be externalized from the apps (APIs) and make a lot of sense to me, see the image below.

But then I have some questions.

1. Is bad to do what I thought in the first image or in the second?

2. How the PDP will know what the user wants to do? Based on the route he is calling? But with this approach, the single responsibility will be hurt as the PDP needs to internalize (step 2) what other apps do, right?

3. The PIP needs to call the database for the PDP validates the authorization. So this can be slow as the same query will be done 2x, one for checking the policy and the other inside the service with business logic.

I'm trying to write a regular expression which doesn't allow 'a' and 'c' to be next to each other in any combination of "abc" , the combinations might be "a" , "b" , "c" , "acb" , "abac" , here "abac" must be ignored because it contains "a" and "c" next to each other , I've written a regular expression which is doing half the job correct and the other half incorrect , it's basically ignoring a , bcb , bcc and others which are not supposed to be ignored.

Here's the regular expression :

Hi we are implementing ABAC over SpringSecurity (looks same as Axiomatics solution). So we would like to define custome expression and customize underlaying mechanisms. e.g. @PreAuthorize("myexpression").

At this point I'm trying understand how can I get information about the target method (the JoinPoint): name, class, parameters. I didn't find how to do it for SpringSecurity customization.

As I Inderstand, other solution may be implemention based direct on AOP e.g. @Around, however I would like to try first to find out if the Spring Security can provide me a way to get somehow JoinPoint it self, isn't it implemented over AOP ?

If anyone have an example, thanks.

I am solving a problem of code forces. Here is the problem link -> Problem Link My code passes 9 test cases out of 10 and the 10th case is this

100

??b?a?a???aca?c?a?ca??????ac?b???aabb?c?ac??cbca???a?b????baa?ca??b???cbc??c??ab?ac???c?bcbb?c??abac

and the error I got is this

wrong answer expected '331264319', found '-2013109745'

Diagnostics detected issues [cpp.clang++-diagnose]: p71.cpp:14:20: runtime error: signed integer overflow: 3 * 965628297 cannot be represented in type 'int' SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior p71.cpp:14:20 in

Other test cases

6 ac?b?c output - 24

7 ??????? output - 2835

9 cccbbbaaa output - 0

100 accbaccabccbbbbabacabaaccacbcbcababbbcbcbcccabcbbc?caaabcabcaaccbccabaaaaccacabbaabcbbccbbababaac output - 14634

This all test cases gives the right answer except the 1st on

and my code which I was submitted is this

I am trying to follow this article for Secret Manager and tried applying attribute based access controll (ABAC) for AWS Lambda by using this user role policy linkage:

1. Create IAM user
2. Assign a role to this IAM user
3. Role is assigned an ABAC policy for lambda.

currently my ABAC policy for Lambda usage for different users in a project is as follows:

This is not a duplicate of The name 'ViewData' does not exist in the current context since that question asks about ASP.NET MVC, which is different from .NET Core!!!

I added the following C# code to my Razor page:

I have a quite specific question that I'm unsure about how to go forward with.

I have a list of numbers and I want to extract some specific patterns from them where I loop through the list and create a new one, it's easier to explain with an example.

Say I have a list, a = [2, 9, 3, 2, 3, 5, 7, 9].

What I want to do with this list is loop through 4 numbers at a time and give them corresponding letters, depending on when they occur in the sequence.

i.e. First four numbers = 2932 = ABCA

Second sequence of numbers = 9323 = ABCB

Third sequence = 3235 = ABAC

Fourth sequence = 2357 = ABCD

Fifth sequence = 3579 = ABCD

I then want to take these sequences and add them to another list which would now look like,

b = [ABCA, ABCB, ABAC, ABCD, ABCD]

I'm really unsure about how the format of the code should be, the length of the new list will always be 3 less than the original. Any help would be great, thanks.

So I'm trying implement a fairly simple ABAC system for my application and came across open policy agent during my investigations. It seems to be a good fit for my needs but I just can't make it work for my use case where I have an user object that is read from jwt claims that looks something like this: { email: "1@1.com", role: "admin", location: "us" }. I want to check if that user has access rights to a specific path (which is provided as input, same as the user). So for example i want to give access rights to /admin/us if user.role == admin and user.location == us. I've created an example on the rego playground and it is working fine as long as the user has exactly the same claims as written in the policy, but fails if the user has any additional claims:

I want to insert text data into a Postgres bytea column using the concat function or the || operator. I am getting an error