ipnetwork | IPNetwork command line and C # library take care | TCP library
kandi X-RAY | ipnetwork Summary
kandi X-RAY | ipnetwork Summary
IPNetwork command line and C# library take care of complex network, IP, IPv4, IPv6, netmask, CIDR, subnet, subnetting, supernet, and supernetting calculation for .NET developers. It works with IPv4 as well as IPv6, is written in C#, has a light and clean API, and is fully unit-tested.
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QUESTION
Short version: I want to apply an IAuthorizationRequirement but only for particular users. Or find a different way to solve my problem.
Long version:
I have an Angular SPA application that uses an Asp.Net 5.0 API behind the scenes for CRUD and business logic. My issues are with the API's authentication and authorization.
Two JwtBearer Authentication SchemesI have a legacy requirement to authenticate and authorize (non human) clients to the same API with a shared secret (which is a Bearer + JWT (signed with the secret) in the Authorization header). So the application can share its data with other applications.
We recently added the ability to authenticate UI users with a third-party using OAuth2/PKCE (it used to be a custom DB authentication). This also comes as a JWT in the Authorization header in the format Bearer + JWT. But it's a different format than our home-grown shared secret-based one.
Enforce a policy that users authenticated by one scheme must be IP-filteredAs a separate effort, I would like the apply a Policy / IAuthorizationRequirement called IPAddressRequirement just to the shared secret authentication. This is so only configured IPs can use that authentication. So, if an authenticated user comes in bearing the Oauth2 JWT, we let them in no matter where they're coming from. If they are authenticated but have the shared secret-signed JWT, we check their IP. This is so, just in case, our shared secret leaks out, some outside bad actor can't use it.
However, the IPAddressRequirement seems to fire on all Authentication schemes. Which would result in UI users authenticated via Oauth2 having their IP addresses checked and blocked unless they are internal (not good).
- Can I have the policy filtered based on the authentication scheme ahead of time?
- Should I try a different approach (what)?
Another thought: I have the following objects available to me at runtime within the policy check. Is there something I can check for in any of them to determine which AuthenticationScheme was used (while I'm evaluating my policy?).
- IHttpContextAccessor (via DI)
- AuthorizationHandlerContext (parameter to the HandleRequirementAsync method)
Here is how I have setup my Policy:
...ANSWER
Answered 2022-Mar-17 at 21:41CUSTOM AUTHENTICATION HANDLER
Sounds like this would be the best fit for your use case, to give you best control and visibility over behaviour. See my example for how to integrate this. You can still use Microsoft's JWT validation within the handler.
CONTROL OVER THE CLAIMS PRINCIPAL
The main reason for the custom handler is to enable claims based authorization in the most extensible way, even if some ways of sending in JWTs are legacy. This includes adding your own claims such as trust_level=1 or whatever makes sense for your use case. See my handler class for an example.
API AUTHORIZATION
You will then be able to use .NET claims features such as policy based authorization within your API logic, as covered in this Curity code example. This could use custom claims produced from your handler, eg the trust_level value above.
More importantly than code niceties such as attributes, you can inject claims into your business logic, as in this code, and your business level authorization is then easy to extend.
MORE ABOUT CLAIMS
Ideally important claims should be issued within JWT access tokens, where they are digitally verifiable, and it should be possible to include domain specific claims, though this is not always supported. For more info on this topic, see this claims article for how claims are the main authorization mechanism in modern APIs.
QUESTION
I have a subnet 172.16.0.0/22 where I have four ranges 172.16.0.0 → 172.16.0.255 , 172.16.1.0 → 172.16.1.255, 172.16.2.0 → 172.16.2.255, and 172.16.3.0 → 172.16.3.255. I am using netaddr to find these ranges.
ANSWER
Answered 2022-Jan-03 at 00:28Try this:
QUESTION
I am new to programming and working on a hobby project. I am creating a process when a certain condition is true using subprocess module in python.
Now I want to terminate the process when the other condition is true.
...ANSWER
Answered 2021-Nov-22 at 21:17Use process.kill() to terminate process. Afterwards do process.wait() to wait till it fully terminates. Example below.
I replaced your shell command with simple python's infinite-loop program. Just for the sake of working example that can be tested by all StackOverflowers.
In your case for loop is not necessary, also my shell command doesn't matter, these two modifications were done only for runnable example purpose.
Notice in second if that I used 'process' in locals() and process is not None, this check is necessary in order to have no error if process variable wasn't yet created, in this case you don't need to kill/wait anything, because there is actually nothing to be killed/waited because there is no process created yet. Also I set variable to process = None so that you never do a second kill again on already killed process.
QUESTION
I am using the Microsoft.AspNetCore.HttpOverrides.IPNetwork class to check to see if an ip address is in a subnet, but the result is not what I expect
...ANSWER
Answered 2021-Sep-17 at 16:48Per https://github.com/dotnet/aspnetcore/issues/6674, there is a bug in MS's Contains implementation for the IPNetwork class. The bug has been fixed, but not yet released. As I read it, it expects the address of the CIDR prefix to be the first address that would come from the CIDR prefix/length.
This means that it doesn't like "10.10.10.1/30" and instead wants "10.10.10.0/30", which does indeed give the expected results.
QUESTION
# GOAL: Compare list1 objects against the entire list2 objects for the output of non-intersecting CIDRs and output CIDRs that do NOT intersect
#
# example: item #1 in list1 gets checked against all entries in list2 for non-intersecting CIDRs
# then item #2 in list1 gets checked against all entries in list2 for non-intersecting CIDRs
# then item #3 in list1 gets checked against all entries in list2 for non-intersecting CIDRs
# output any in CIDRs in list1 that do NOT intersect any item in any CIDR from list2
# list1 and list2 are literally 2 files of which both contain tons of IPs with their CIDR range
# Need to check for any list1 items intersecting IPs with any of list 2 items
# Servers as loop counters and the lines contained in list1
list1_counter = 0
# Servers as loop counters and the lines contained in list2
list2_counter = 0
# collect results from CIDR check
results = []
# loop until at the line count of line2 as it reached the end of list
while list1_counter <= list2_cidr_count:
# for list1's first line compared to all of list2 lines
for list1_lines[list1_counter] in list2_lines:
print(list1_lines[list1_counter])
print(list2_lines[list2_counter])
# Compare CIDR for any intersections for list1's first line to all of list2 lines
a = (ipaddr.IPNetwork(list1_lines[list1_counter]).overlaps(list2_lines[list2_counter]))
# append to results list here
results.append(a)
# increase counter to go to list1's second line and start from top
list2_counter += 1
ANSWER
Answered 2021-Aug-20 at 23:09What helped me when I was starting out writing code, creating loops and flow-control was writing down what I wanted to do in basic English before beginning to code.
So, if we simplify the instructions in your code, and skip the part about CIDRs, then we can write it down as the following:
We have two lists:
- list1
- list2
For each value inside of list1, we want to go over each value inside of list2 and compare them to each other.
If the current value of list1 is found inside of list2, then we want to discard that value. However, if no matches were found, then we want to save that value.
Okay, so now we can create a simpler example with the above statements as the scaffold of our loops and comparisons:
QUESTION
I have a list of cidr notations and i have a python program that generates a list of ip adress from the cidr notation.Here is the program
...ANSWER
Answered 2021-Jul-28 at 11:47Try this:
QUESTION
I trying to write a Python script to convert the range between two IP addresses to CIDR,
...ANSWER
Answered 2020-Sep-02 at 19:01If iprange_to_cidrs always returns the minimum number of IP ranges needed to span the supplied range (as seems likely) then you only need to test the length of the list which it returns.
However, if you do not want to verify that this is always the case, the following approach could be used.
QUESTION
I want to write script to scan subnet, take List of IPs and open Multi-Thread sessions to scan ALL those IPs in same time for open ports:
...ANSWER
Answered 2020-Aug-05 at 15:41Yes, you're passing in each var in the list as an argument, aka 2 arguments. You can add each thread to a list, start them all, and then join them all which is generally how I use multiprocessing. Try something like this to give you an idea of how that might work--
QUESTION
I Want to iterate over some IP address and networks, to check if an IP belongs to a particular network.
This is what I have written so far.
...ANSWER
Answered 2020-Apr-01 at 15:09import netaddr,ipaddress
from netaddr import *
IP_found = []
IP_miss = []
dca = ['172.17.34.2', '172.17.33.1', '172.17.35.1', '172.17.36.2']
ip_net = [IPNetwork('172.17.34.0/27'), IPNetwork('172.17.35.0/27')]
for ip in dca: # Loops through the ip
if any(ip in ip_subnet for ip_subnet in ip_net): # Loops through subnet
IP_found.append(ip)
else:
IP_miss.append(ip)
print(len(IP_found))
print(len(IP_miss))
print(IP_found)
print(IP_miss)
QUESTION
I'm trying to build a simple web app based on tutorials: one, two and three. All of them uses slightly different approaches and were written for older versions of the used libraries, so current Diesel and Rocket API slightly differs. I want in response to POST-request return created record or record id. At this point I'm able to return only list of records - list of a single record (attempts to return single record, based on Vec.first() don't compile).
Cargo.toml:
...ANSWER
Answered 2020-Feb-03 at 09:22It's as simple as changing the function that loads values from the database.
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