How do I update the Credentials after I upload a report to POWER BI

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Jeff_973 wrote:

After I publish a report to the Power BI Service, I cannot embed the report until I set the credentials for the source of the data. Currently, I have to log into Power Bi portal and do this manually. I would like to programmatically set the credentials using the Microsoft.PowerBi.API.V2.Models SDK. Is there any good examples out there on how to do this?  

 

I call the PowerBIClient.Datasets.GetGatewayDatasourcesInGroupWithHttpMessagesAsync to get a reference to the GatewayDatasource object and then call the PowerBIClient.Gateways.UpdateDatasourceWithHttpMessagesAsync to update the credentials. Is this correct?

 

One issue I am having is constructing a CredentialDetails obj which is needed to create an UpdateDatasourceRequest object which is one of the parameters to call the UpdateDatasource method. 

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Jeff_973

You could check my last reply in this thread.

public static class AsymmetricKeyEncryptionHelper
    {

        private const int SegmentLength = 85;
        private const int EncryptedLength = 128;


        /// <summary>
        /// 
        /// </summary>
        /// <param name="userName"></param> the datasouce user name
        /// <param name="password"></param> the datasource password
        /// <param name="gatewaypublicKeyExponent"></param> gateway publicKey Exponent field, you can get it from the get gateways api response json
        /// <param name="gatewaypublicKeyModulus"></param> gateway publicKey Modulus field, you can get it from the get gateways api response json
        /// <returns></returns>
        public static string EncodeCredentials(string userName, string password, string gatewaypublicKeyExponent, string gatewaypublicKeyModulus)
        {
            // using json serializer to handle escape characters in username and password
            var plainText = string.Format("{{\"credentialData\":[{{\"value\":{0},\"name\":\"username\"}},{{\"value\":{1},\"name\":\"password\"}}]}}", JsonConvert.SerializeObject(userName), JsonConvert.SerializeObject(password));
            using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(EncryptedLength * 8))
            {
                var parameters = rsa.ExportParameters(false);
                parameters.Exponent = Convert.FromBase64String(gatewaypublicKeyExponent);
                parameters.Modulus = Convert.FromBase64String(gatewaypublicKeyModulus);
                rsa.ImportParameters(parameters);
                return Encrypt(plainText, rsa);
            }
        }

        private static string Encrypt(string plainText, RSACryptoServiceProvider rsa)
        {
            byte[] plainTextArray = Encoding.UTF8.GetBytes(plainText);

            // Split the message into different segments, each segment's length is 85. So the result may be 85,85,85,20.
            bool hasIncompleteSegment = plainTextArray.Length % SegmentLength != 0;

            int segmentNumber = (!hasIncompleteSegment) ? (plainTextArray.Length / SegmentLength) : ((plainTextArray.Length / SegmentLength) + 1);

            byte[] encryptedData = new byte[segmentNumber * EncryptedLength];
            int encryptedDataPosition = 0;

            for (var i = 0; i < segmentNumber; i++)
            {
                int lengthToCopy;

                if (i == segmentNumber - 1 && hasIncompleteSegment)
                    lengthToCopy = plainTextArray.Length % SegmentLength;
                else
                    lengthToCopy = SegmentLength;

                var segment = new byte[lengthToCopy];

                Array.Copy(plainTextArray, i * SegmentLength, segment, 0, lengthToCopy);

                var segmentEncryptedResult = rsa.Encrypt(segment, true);

                Array.Copy(segmentEncryptedResult, 0, encryptedData, encryptedDataPosition, segmentEncryptedResult.Length);

                encryptedDataPosition += segmentEncryptedResult.Length;
            }

            return Convert.ToBase64String(encryptedData);
        }
    }

You can use it as

var credentials = AsymmetricKeyEncryptionHelper.EncodeCredentials(username, password, gateway.PublicKey.Exponent, gateway.PublicKey.Modulus);

I am having the same issue. Any updates on where to get the below values? 

gateway.PublicKey.Exponent, gateway.PublicKey.Modulus