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(Xojo Plugin) PRODA Get OAuth2 Access Token using JWT

See more PRODA Examples

Demonstrates how to get an OAuth2 access token for the PRODA Australian Government Online Services using a JWT.

For more information, see https://www.servicesaustralia.gov.au/organisations/business/services/proda-provider-digital-access

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Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// First create a JWT to be sent in the POST to https://vnd.proda.humanservices.gov.au/mga/sps/oauth/oauth20/token

Dim privKey As New Chilkat.PrivateKey

// Load an RSA private key from a PEM file.
// Chilkat provides alternative methods to load from other formats, or to load from a string or binary data.
Dim success As Boolean
success = privKey.LoadEncryptedPemFile("qa_data/pem/rsa_passwd.pem","passwd")
If (success <> True) Then
    System.DebugLog(privKey.LastErrorText)
    Return
End If

Dim jwt As New Chilkat.Jwt

// Build the JOSE header
Dim jose As New Chilkat.JsonObject
// Use RS256.  Pass the string "RS384" or "RS512" to use RSA with SHA-384 or SHA-512.
success = jose.AppendString("alg","RS256")
success = jose.AppendString("typ","JWT")
success = jose.AppendString("kid","test-device")

// Now build the JWT claims (also known as the payload)
Dim claims As New Chilkat.JsonObject
success = claims.AppendString("iss","9646844092")
success = claims.AppendString("sub","test-device")
success = claims.AppendString("aud","https://proda.humanservices.gov.au")

// Set the timestamp of when the JWT was created to now.
Dim curDateTime As Int32
curDateTime = jwt.GenNumericDate(0)
success = claims.AddIntAt(-1,"iat",curDateTime)

// Set the timestamp defining an expiration time (end time) for the token
// to be now + 1 hour (3600 seconds)
success = claims.AddIntAt(-1,"exp",curDateTime + 3600)

// Produce the smallest possible JWT:
jwt.AutoCompact = True

// Create the JWT token.  This is where the RSA signature is created.
Dim jwtToken As String
jwtToken = jwt.CreateJwtPk(jose.Emit(),claims.Emit(),privKey)

// ---------------------------------------------------------------------
// Build and send the POST, which should look something like this:

// POST https://vnd.proda.humanservices.gov.au/mga/sps/oauth/oauth20/token HTTP/1.1
// Content-Type: application/x-www-form-urlencoded
// Content-Length: 666
// Host: vnd.proda.humanservices.gov.au
// 
// grant_type=urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer&assertion=<jwt>&client_id=VendorClient03

Dim http As New Chilkat.Http

Dim req As New Chilkat.HttpRequest

// Add the request params.
req.AddParam "grant_type","urn:ietf:params:oauth:grant-type:jwt-bearer"
req.AddParam "assertion",jwtToken
req.AddParam "client_id","VendorClient03"

// Send the POST
// Chilkat automatically adds the Content-Type (which is application/x-www-form-urlencoded for the PostUrlEncoded method)
// Chilkat also automatically adds the Host and Content-Length headers.
Dim resp As Chilkat.HttpResponse
resp = http.PostUrlEncoded("https://vnd.proda.humanservices.gov.au/mga/sps/oauth/oauth20/token",req)
If (http.LastMethodSuccess <> True) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

System.DebugLog("Response status code = " + Str(resp.StatusCode))
System.DebugLog("Response body:")
System.DebugLog(resp.BodyStr)


 

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