Classic ASP
Classic ASP
ING Open Banking OAuth2 Client Credentials
See more OAuth2 Examples
Demonstrates how to get an access token for the ING Open Banking APIs using client credentials.Chilkat Classic ASP Downloads
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<%
success = 0
' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.
set cert = Server.CreateObject("Chilkat.Cert")
success = cert.LoadFromFile("qa_data/certs_and_keys/ING/example_client_tls.cer")
If (success = 0) Then
Response.Write "<pre>" & Server.HTMLEncode( cert.LastErrorText) & "</pre>"
Response.End
End If
set bdPrivKey = Server.CreateObject("Chilkat.BinData")
success = bdPrivKey.LoadFile("qa_data/certs_and_keys/ING/example_client_tls.key")
If (success = 0) Then
Response.Write "<pre>" & Server.HTMLEncode( "Failed to load example_client_tls.key") & "</pre>"
Response.End
End If
' The OAuth 2.0 client_id for these certificates is e77d776b-90af-4684-bebc-521e5b2614dd.
' Please note down this client_id since you will need it in the next steps to call the API.
set privKey = Server.CreateObject("Chilkat.PrivateKey")
success = privKey.LoadAnyFormat(bdPrivKey,"")
If (success = 0) Then
Response.Write "<pre>" & Server.HTMLEncode( privKey.LastErrorText) & "</pre>"
Response.End
End If
' Associate the private key with the certificate.
success = cert.SetPrivateKey(privKey)
If (success = 0) Then
Response.Write "<pre>" & Server.HTMLEncode( cert.LastErrorText) & "</pre>"
Response.End
End If
set http = Server.CreateObject("Chilkat.Http")
success = http.SetSslClientCert(cert)
If (success = 0) Then
Response.Write "<pre>" & Server.HTMLEncode( http.LastErrorText) & "</pre>"
Response.End
End If
' Calculate the Digest and add the "Digest" header. Do the equivalent of this:
' payload="grant_type=client_credentials"
' payloadDigest=`echo -n "$payload" | openssl dgst -binary -sha256 | openssl base64`
' digest=SHA-256=$payloadDigest
set crypt = Server.CreateObject("Chilkat.Crypt2")
crypt.HashAlgorithm = "SHA256"
crypt.EncodingMode = "base64"
payload = "grant_type=client_credentials"
payloadDigest = crypt.HashStringENC(payload)
' Calculate the current date/time and add the Date header.
' reqDate=$(LC_TIME=en_US.UTF-8 date -u "+%a, %d %b %Y %H:%M:%S GMT")
set dt = Server.CreateObject("Chilkat.CkDateTime")
success = dt.SetFromCurrentSystemTime()
' The desire date/time format is the "RFC822" format.
http.SetRequestHeader "Date",dt.GetAsRfc822(0)
' Calculate signature for signing your request
' Duplicate the following code:
' httpMethod="post"
' reqPath="/oauth2/token"
' signingString="(request-target): $httpMethod $reqPath
' date: $reqDate
' digest: $digest"
' signature=`printf "$signingString" | openssl dgst -sha256 -sign "${certPath}example_client_signing.key" -passin "pass:changeit" | openssl base64 -A`
httpMethod = "POST"
reqPath = "/oauth2/token"
set sbStringToSign = Server.CreateObject("Chilkat.StringBuilder")
success = sbStringToSign.Append("(request-target): ")
success = sbStringToSign.Append(httpMethod)
success = sbStringToSign.ToLowercase()
success = sbStringToSign.Append(" ")
success = sbStringToSign.AppendLine(reqPath,0)
success = sbStringToSign.Append("date: ")
success = sbStringToSign.AppendLine(dt.GetAsRfc822(0),0)
success = sbStringToSign.Append("digest: SHA-256=")
success = sbStringToSign.Append(payloadDigest)
set signingPrivKey = Server.CreateObject("Chilkat.PrivateKey")
success = signingPrivKey.LoadPemFile("qa_data/certs_and_keys/ING/example_client_signing.key")
If (success = 0) Then
Response.Write "<pre>" & Server.HTMLEncode( signingPrivKey.LastErrorText) & "</pre>"
Response.End
End If
set rsa = Server.CreateObject("Chilkat.Rsa")
success = rsa.UsePrivateKey(signingPrivKey)
If (success = 0) Then
Response.Write "<pre>" & Server.HTMLEncode( rsa.LastErrorText) & "</pre>"
Response.End
End If
rsa.EncodingMode = "base64"
b64Signature = rsa.SignStringENC(sbStringToSign.GetAsString(),"SHA256")
set sbAuthHdrVal = Server.CreateObject("Chilkat.StringBuilder")
success = sbAuthHdrVal.Append("Signature keyId=""e77d776b-90af-4684-bebc-521e5b2614dd"",")
success = sbAuthHdrVal.Append("algorithm=""rsa-sha256"",")
success = sbAuthHdrVal.Append("headers=""(request-target) date digest"",")
success = sbAuthHdrVal.Append("signature=""")
success = sbAuthHdrVal.Append(b64Signature)
success = sbAuthHdrVal.Append("""")
set sbDigestHdrVal = Server.CreateObject("Chilkat.StringBuilder")
success = sbDigestHdrVal.Append("SHA-256=")
success = sbDigestHdrVal.Append(payloadDigest)
' Do the following CURL statement:
' curl -i -X POST "${httpHost}${reqPath}" \
' -H 'Accept: application/json' \
' -H 'Content-Type: application/x-www-form-urlencoded' \
' -H "Digest: ${digest}" \
' -H "Date: ${reqDate}" \
' -H "authorization: Signature keyId=\"$keyId\",algorithm=\"rsa-sha256\",headers=\"(request-target) date digest\",signature=\"$signature\"" \
' -d "${payload}" \
' --cert "${certPath}tlsCert.crt" \
' --key "${certPath}tlsCert.key"
set req = Server.CreateObject("Chilkat.HttpRequest")
req.AddParam "grant_type","client_credentials"
req.AddHeader "Accept","application/json"
req.AddHeader "Date",dt.GetAsRfc822(0)
req.AddHeader "Digest",sbDigestHdrVal.GetAsString()
req.AddHeader "Authorization",sbAuthHdrVal.GetAsString()
req.HttpVerb = "POST"
req.ContentType = "application/x-www-form-urlencoded"
set resp = Server.CreateObject("Chilkat.HttpResponse")
success = http.HttpReq("https://api.sandbox.ing.com/oauth2/token",req,resp)
If (success = 0) Then
Response.Write "<pre>" & Server.HTMLEncode( http.LastErrorText) & "</pre>"
Response.End
End If
' If successful, the status code = 200
Response.Write "<pre>" & Server.HTMLEncode( "Response Status Code: " & resp.StatusCode) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( resp.BodyStr) & "</pre>"
set json = Server.CreateObject("Chilkat.JsonObject")
success = json.Load(resp.BodyStr)
json.EmitCompact = 0
Response.Write "<pre>" & Server.HTMLEncode( json.Emit()) & "</pre>"
' A successful response contains an access token such as:
' {
' "access_token": "eyJhbGc ... bxI_SoPOBH9xmoM",
' "expires_in": 905,
' "scope": "payment-requests:view payment-requests:create payment-requests:close greetings:view virtual-ledger-accounts:fund-reservation:create virtual-ledger-accounts:fund-reservation:delete virtual-ledger-accounts:balance:view",
' "token_type": "Bearer",
' "keys": [
' {
' "kty": "RSA",
' "n": "3l3rdz4...04VPkdV",
' "e": "AQAB",
' "use": "sig",
' "alg": "RS256",
' "x5t": "3c396700fc8cd709cf9cb5452a22bcde76985851"
' }
' ],
' "client_id": "e77d776b-90af-4684-bebc-521e5b2614dd"
' }
' Use this online tool to generate parsing code from sample JSON:
' Generate Parsing Code from JSON
access_token = json.StringOf("access_token")
expires_in = json.IntOf("expires_in")
scope = json.StringOf("scope")
token_type = json.StringOf("token_type")
client_id = json.StringOf("client_id")
i = 0
count_i = json.SizeOfArray("keys")
Do While i < count_i
json.I = i
kty = json.StringOf("keys[i].kty")
n = json.StringOf("keys[i].n")
e = json.StringOf("keys[i].e")
use = json.StringOf("keys[i].use")
alg = json.StringOf("keys[i].alg")
x5t = json.StringOf("keys[i].x5t")
i = i + 1
Loop
' This example will save the JSON containing the access key to a file so that
' a subsequent example can load it and then use the access key for a request, such as to create a payment request.
success = json.WriteFile("qa_data/tokens/ing_access_token.json")
%>
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