(Swift 3,4,5...) ABN AMRO OAuth2 Client Credentials Authentication

Demonstrates how to obtain an access token for an ABN AMRO online API using OAuth2 with the Client Credentials flow.

For more information, see https://developer.abnamro.com/api/payment-initiation-v1/payment-initiation-tutorial

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    // This example sends the following CURL request:

    // 	curl -X POST -k https://auth-sandbox.connect.abnamro.com:8443/as/token.oauth2 \
    // 	-v \
    // 	--cert TPPCertificate.crt \
    // 	--key TPPprivateKey.key \
    // 	-H 'Cache-Control: no-cache' \
    // 	-H 'Content-Type: application/x-www-form-urlencoded' \
    // 	-d 'grant_type=client_credentials&client_id=TPP_test&scope=psd2:payment:sepa:write psd2:payment:sepa:read'

    let cert = CkoCert()!
    var success: Bool = cert.load(fromFile: "qa_data/certs/TPPCertificate.cer")
    if success != true {
        print("\(cert.lastErrorText!)")
        return
    }

    let bdKey = CkoBinData()!
    success = bdKey.loadFile("qa_data/certs/TPPprivateKey.key")

    let privKey = CkoPrivateKey()!
    success = privKey.loadAnyFormat(bdKey, password: "passwordIfNeeded")
    if success != true {
        print("\(privKey.lastErrorText!)")
        return
    }

    success = cert.setPrivateKey(privKey)
    if success != true {
        print("\(cert.lastErrorText!)")
        return
    }

    let http = CkoHttp()!

    success = http.setSslClientCert(cert)
    if success != true {
        print("\(http.lastErrorText!)")
        return
    }

    let req = CkoHttpRequest()!
    req.addParam("grant_type", value: "client_credentials")
    req.addParam("client_id", value: "TPP_test")
    req.addParam("scope", value: "psd2:payment:sepa:write psd2:payment:sepa:read")

    var resp: CkoHttpResponse? = http.postUrlEncoded("https://auth-sandbox.connect.abnamro.com:8443/as/token.oauth2", req: req)
    if http.lastMethodSuccess == false {
        print("\(http.lastErrorText!)")
        return
    }

    if resp!.statusCode.intValue != 200 {
        print("\(resp!.bodyStr!)")
        resp = nil
        return
    }

    // Get the JSON result:
    // {"access_token":"TIhycwl8rfrZPkXGw15mwldASAAK","token_type":"Bearer","expires_in":7200}
    let json = CkoJsonObject()!
    json.load(resp!.bodyStr)
    print("access_token: \(json.string(of: "access_token")!)")
    print("token_type: \(json.string(of: "token_type")!)")
    print("expires_in: \(json.string(of: "expires_in")!)")

    resp = nil

}