How does Postman generate oAuth 1.0a signatures? - oauth

I'm attempting to connect to an oAuth 1.0 authenticated endpoint but the signature that Postman creates does not match the signature we expect in our code. As far as I can see all the parameters that I have added are correct (Url, consumer_key, consumer_secret, nonce, timestamp, HMAC-SHA1) but Postman just seems to generate a different signature with these details. Does anyone know how Postman creates the signature?

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LinkedIn - Getting Access Token Error invalid_redirect_uri

has anyone succeeded in connecting to Linkedin API here?
I followed the instructions on the docs but failed to retrieve the Authorization Code.
Here's the result of my POST request to get the access_token
{
"error": "invalid_redirect_uri",
"error_description": "Unable to retrieve access token: appid/redirect uri/code verifier does not match authorization code. Or authorization code expired. Or external member binding exists"
}
I'm using the https//airbyte.io as a redirect_uri
My GET get request to obtain the authorization token is the following:
https://www.linkedin.com/oauth/v2/authorization?response_type=code&client_id=78oy2gu644mxz2&redirect_uri=https%3A%2F%2Fairbyte.io&scope=r_ads,r_ads_reporting,r_organization_social
I followed a couple advices in the different thread in SO
double checked my client_id and client_secret
encoded the URI in GET request
added scope parameters to the redirect_url at the POST request
Tested the request with the code within 20 seconds window.
Couple of things:
Ensure your redirect URI is also defined within your app's configuration as an allowed redirect URI. See https://learn.microsoft.com/en-us/linkedin/shared/authentication/authorization-code-flow?context=linkedin%2Fmarketing%2Fcontext&view=li-lms-2022-11&tabs=HTTPS1#step-1-configure-your-application. The documentation specifies a certain URL to use when testing with Postman.
In your authorization call, your scopes are comma-delimited. They should be space-delimited and URL-encoded. See https://learn.microsoft.com/en-us/linkedin/shared/authentication/authorization-code-flow?context=linkedin%2Fmarketing%2Fcontext&view=li-lms-2022-11&tabs=HTTPS1#step-2-request-an-authorization-code.

Access to api.twitter.com/2/users/:id/following as a user

I'm try to request call this route api.twitter.com/2/users/:id/following also getting the error :
Authenticating with OAuth 2.0 Application-Only is forbidden for this endpoint. Supported authentication types are [OAuth 1.0a User Context, OAuth 2.0 User Context].
I've trying to understand how I should generate an oauth token valid for this request, but i'm a bit lost! I've all the pipe line for the user authentication and for the last request I can get all user data including userToken and tokenSecret how i can use that info to generate the token for my request?
Also I've try to generate a token generate with apiKey and apiSecret withtou success
curl -u 'apiKey:apiSecret'
--data 'grant_type=client_credentials'
'https://api.twitter.com/oauth2/token'
I'm really lost using twitter api because of the multiples ways to authenticate
The curl command you're using will give an App-Only token, this won't work if you're trying the POST /2/users/:id/following endpoint. Follow this guide on generating an OAuth 2.0 User Access Token.

Define OAuth 2.0 Token Request in Postman

I'm trying to understand OAuth 2.0 which is scarcely, badly documented and I'm trying to implement OAuth 2.0 client call in my App. I am using Postman to simulate API calls, which works. Postman shows big orange button "Get New Access Token", where I select Grant Type, URL, Client ID, Client Secret, Scope and Authentication type. Upon clicking button Request Token, new bearer token is returned by the API, meaning the authentication succeeded. This of course is completely useless approach to me, because I have no idea what just happened. I need to create actual request that shows me exactly how it is formed, so that successful response with bearer token is returned. Postman, for absolutely no reason, will not let me see that or convert it's useless UI into a functional API request. All I have is black box with orange button "Request Token", which does who knows what.
Does anyone know, how to form a working OAuth 2.0 bearer token request in Postman, preferably to convert their useless token request dialog directly into a request?
After some research I have been able to form a valid OAuth2 token request. For clarity, here is a code sample, which we need to convert to Postman response:
var client = new RestClient("https://api_address/token");
client.Timeout = -1;
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Basic hash");
request.AddHeader("Content-Type", "application/x-www-form-urlencoded");
request.AddParameter("grant_type", "client_credentials");
IRestResponse response = client.Execute(request);
Console.WriteLine(response.Content);
The hash part of the request is formed from client_id and client_secret values. In Postman, this is defined as such:
Create a simple POST request with token API url.
Go to Authorization tab.
Select Basic Auth
Enter client_id and client_secret into corresponding fields as username and password.
Go to Body tab.
Select x-www-form-urlencoded.
Enter key grant_type with value of client_credentials.
This example is for the client credentials flow. OAuth2 authors felt that calling auth scenarios as auth scenarios isn't cool enough, so they are called flows, which is nonsense, but sounds cooler.
Process one:
Process two:
First, determine whether your token is passed through the header
It could be:
else process:

How to generate quickbooks request token in OAuth.I am receving bad request message

I am using the below format for generating the request token.I am getting bad request when
using the above code.What should auth_callback should i use.
https://oauth.intuit.com/oauth/v1/get_request_token?
&oauth_timestamp=1202956957
&oauth_consumer_key=123456891011121314151617181920
&oauth_signature_method=plaintext
&oauth_signature=abcdef
&oauth_version=1.0
&xoauth_lang_pref="en-us"
&oauth_callback="http://yoursite.com/callback".
This signature:
&oauth_signature=abcdef
Is no where near a valid signature.
You need to use an OAuth library, and generate a valid OAuth request and signature before you send the request to Intuit.
I also highly doubt your consumer key is correct.

MapMyFitness API OAuth questions

I am having some issues with MapMyFitness API. MapMyFitness uses OAuth 1.0
I am able to successfully get a temporary Authorization token/temporary secret Token combination from calling 3.1/oauth/request_token
After that, I am able to successfully direct the user to the Authorization page and get a redirect callback with a authorization verifier.
After that, I am, unfortunately, getting errors when trying to call 3.1/oauth/access_token. (HTTP error 401)
First of all, MMF documentation (http://api.mapmyfitness.com/3.1/oauth/access_token?doc) states: Exchange a request token and an authorization verifier for an access token. However, the list of input arguments in the documentation contains no mention of oauth_verifier. Should oauth_verifier that I have received with the redirect callback be passed to access_token call as an argument?
Secondly, it appears to me that perhaps I am not creating the signature correctly. For the 3.1/oauth/request_token call the key to generate the signature is 'XXX&' where XXX is the Consumer Secret Key assigned to my app by MapMyFitness. This works fine. For the 3.1/oauth/access_token call, I am using 'XXX&YYY' as a signature key where XXX is the Consumer Secret Key assigned to my app by MapMyFitness and YYY is the temporary Secret Token returned to me by the server during the 3.1/oauth/request_token call. Is that correct?
I would greatly appreciate any suggestions.
OK, I got it working. First of all, oauth_verifier DOES need to be included as part of parameters. For some reason, Map My Fitness does not include it in its list of required parameters, but it has to be there. Secondly - very important - according to OAuth 1.0 documentation, all parameters need to be in alphabetical order when creating the signature - otherwise there will be a signature mismatch and you'll get HTTP 401 error. Once I sorted my parameters in alphabetical order, I was able to exchange temporary MapMyFitness credentials to permanent ones.

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