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DataElements.cs
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DataElements.cs
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using System;
using System.Globalization;
using System.Linq;
using System.Text;
namespace ISO_8583_MessageSandbox
{
public static class DataElements
{
private static readonly int[] _elementVariableLength = new int[130];
private static readonly int[] _elementFixedLength = new int[130];
string[] _elementsIndicator = new string[130];
public string Field127_3 { get; set; }
public string Field127_6 { get; set; }
public string Field127_9 { get; set; }
static DataElements()
{
#region variable legths
_elementVariableLength[2] = 16;
_elementVariableLength[32] = 2;
_elementVariableLength[33] = 2;
_elementVariableLength[34] = 2;
_elementVariableLength[35] = 2;
_elementVariableLength[36] = 3;
_elementVariableLength[44] = 25;
_elementVariableLength[45] = 2;
_elementVariableLength[46] = 3;
_elementVariableLength[47] = 3;
_elementVariableLength[48] = 3;
_elementVariableLength[54] = 3;
_elementVariableLength[55] = 3;
_elementVariableLength[56] = 3;
_elementVariableLength[57] = 3;
_elementVariableLength[58] = 3;
_elementVariableLength[59] = 3;
_elementVariableLength[60] = 1;
_elementVariableLength[61] = 3;
_elementVariableLength[62] = 3;
_elementVariableLength[63] = 3;
_elementVariableLength[72] = 3;
_elementVariableLength[99] = 2;
_elementVariableLength[100] = 2;
_elementVariableLength[102] = 2;
_elementVariableLength[103] = 2;
_elementVariableLength[104] = 3;
_elementVariableLength[105] = 3;
_elementVariableLength[106] = 3;
_elementVariableLength[107] = 3;
_elementVariableLength[108] = 3;
_elementVariableLength[109] = 3;
_elementVariableLength[110] = 3;
_elementVariableLength[111] = 3;
_elementVariableLength[112] = 3;
_elementVariableLength[113] = 2;
_elementVariableLength[114] = 3;
_elementVariableLength[115] = 3;
_elementVariableLength[116] = 3;
_elementVariableLength[117] = 3;
_elementVariableLength[118] = 3;
_elementVariableLength[119] = 3;
_elementVariableLength[120] = 3;
_elementVariableLength[121] = 3;
_elementVariableLength[122] = 3;
_elementVariableLength[123] = 3;
_elementVariableLength[124] = 3;
_elementVariableLength[125] = 2;
_elementVariableLength[126] = 1;
_elementVariableLength[127] = 3;
#endregion
#region fixed length
// "-" means not numeric.
_elementFixedLength[0] = 16;
_elementFixedLength[1] = 16;
_elementFixedLength[3] = 6;
_elementFixedLength[4] = 12;
_elementFixedLength[5] = 12;
_elementFixedLength[6] = 12;
_elementFixedLength[7] = 10;
_elementFixedLength[8] = 8;
_elementFixedLength[9] = 8;
_elementFixedLength[10] = 8;
_elementFixedLength[11] = 6;
_elementFixedLength[12] = 6;
_elementFixedLength[13] = 4;
_elementFixedLength[14] = 4;
_elementFixedLength[15] = 4;
_elementFixedLength[16] = 4;
_elementFixedLength[17] = 4;
_elementFixedLength[18] = 4;
_elementFixedLength[19] = 3;
_elementFixedLength[20] = 3;
_elementFixedLength[21] = 3;
_elementFixedLength[22] = 3;
_elementFixedLength[23] = 3;
_elementFixedLength[24] = 3;
_elementFixedLength[25] = 2;
_elementFixedLength[26] = 2;
_elementFixedLength[27] = 1;
_elementFixedLength[28] = 9;
_elementFixedLength[29] = 8;
_elementFixedLength[30] = 9;
_elementFixedLength[31] = 8;
_elementFixedLength[37] = -12;
_elementFixedLength[38] = -6;
_elementFixedLength[39] = -2;
_elementFixedLength[40] = -3;
_elementFixedLength[41] = -8;
_elementFixedLength[42] = -15;
_elementFixedLength[43] = -40;
_elementFixedLength[44] = -25;
_elementFixedLength[49] = -3;
_elementFixedLength[50] = -3;
_elementFixedLength[51] = -3;
_elementFixedLength[52] = -8;
_elementFixedLength[53] = 18;
_elementFixedLength[64] = -4;
_elementFixedLength[65] = -16;
_elementFixedLength[66] = 1;
_elementFixedLength[67] = 2;
_elementFixedLength[68] = 3;
_elementFixedLength[69] = 3;
_elementFixedLength[70] = 3;
_elementFixedLength[71] = 4;
_elementFixedLength[73] = 6;
_elementFixedLength[74] = 10;
_elementFixedLength[75] = 10;
_elementFixedLength[76] = 10;
_elementFixedLength[77] = 10;
_elementFixedLength[78] = 10;
_elementFixedLength[79] = 10;
_elementFixedLength[80] = 10;
_elementFixedLength[81] = 10;
_elementFixedLength[82] = 12;
_elementFixedLength[83] = 12;
_elementFixedLength[84] = 12;
_elementFixedLength[85] = 12;
_elementFixedLength[86] = 15;
_elementFixedLength[87] = 15;
_elementFixedLength[88] = 15;
_elementFixedLength[89] = 15;
_elementFixedLength[90] = 42;
_elementFixedLength[91] = -1;
_elementFixedLength[92] = 2;
_elementFixedLength[93] = 5;
_elementFixedLength[94] = -7;
_elementFixedLength[95] = -42;
_elementFixedLength[96] = -8;
_elementFixedLength[97] = 16;
_elementFixedLength[98] = -25;
_elementFixedLength[101] = -17;
_elementFixedLength[128] = -16;
#endregion
}
public DataElements(byte[] elements, byte[] bitmap)
{
#region variable legths
_elementVariableLength[2] = 16;
_elementVariableLength[32] = 2;
_elementVariableLength[33] = 2;
_elementVariableLength[34] = 2;
_elementVariableLength[35] = 2;
_elementVariableLength[36] = 3;
_elementVariableLength[44] = 25;
_elementVariableLength[45] = 2;
_elementVariableLength[46] = 3;
_elementVariableLength[47] = 3;
_elementVariableLength[48] = 3;
_elementVariableLength[54] = 3;
_elementVariableLength[55] = 3;
_elementVariableLength[56] = 3;
_elementVariableLength[57] = 3;
_elementVariableLength[58] = 3;
_elementVariableLength[59] = 3;
_elementVariableLength[60] = 1;
_elementVariableLength[61] = 3;
_elementVariableLength[62] = 3;
_elementVariableLength[63] = 3;
_elementVariableLength[72] = 3;
_elementVariableLength[99] = 2;
_elementVariableLength[100] = 2;
_elementVariableLength[102] = 2;
_elementVariableLength[103] = 2;
_elementVariableLength[104] = 3;
_elementVariableLength[105] = 3;
_elementVariableLength[106] = 3;
_elementVariableLength[107] = 3;
_elementVariableLength[108] = 3;
_elementVariableLength[109] = 3;
_elementVariableLength[110] = 3;
_elementVariableLength[111] = 3;
_elementVariableLength[112] = 3;
_elementVariableLength[113] = 2;
_elementVariableLength[114] = 3;
_elementVariableLength[115] = 3;
_elementVariableLength[116] = 3;
_elementVariableLength[117] = 3;
_elementVariableLength[118] = 3;
_elementVariableLength[119] = 3;
_elementVariableLength[120] = 3;
_elementVariableLength[121] = 3;
_elementVariableLength[122] = 3;
_elementVariableLength[123] = 3;
_elementVariableLength[124] = 3;
_elementVariableLength[125] = 2;
_elementVariableLength[126] = 1;
_elementVariableLength[127] = 3;
#endregion
#region fixed length
// "-" means not numeric.
_elementFixedLength[0] = 16;
_elementFixedLength[1] = 16;
_elementFixedLength[3] = 6;
_elementFixedLength[4] = 12;
_elementFixedLength[5] = 12;
_elementFixedLength[6] = 12;
_elementFixedLength[7] = 10;
_elementFixedLength[8] = 8;
_elementFixedLength[9] = 8;
_elementFixedLength[10] = 8;
_elementFixedLength[11] = 6;
_elementFixedLength[12] = 6;
_elementFixedLength[13] = 4;
_elementFixedLength[14] = 4;
_elementFixedLength[15] = 4;
_elementFixedLength[16] = 4;
_elementFixedLength[17] = 4;
_elementFixedLength[18] = 4;
_elementFixedLength[19] = 3;
_elementFixedLength[20] = 3;
_elementFixedLength[21] = 3;
_elementFixedLength[22] = 3;
_elementFixedLength[23] = 3;
_elementFixedLength[24] = 3;
_elementFixedLength[25] = 2;
_elementFixedLength[26] = 2;
_elementFixedLength[27] = 1;
_elementFixedLength[28] = 9;
_elementFixedLength[29] = 8;
_elementFixedLength[30] = 9;
_elementFixedLength[31] = 8;
_elementFixedLength[37] = -12;
_elementFixedLength[38] = -6;
_elementFixedLength[39] = -2;
_elementFixedLength[40] = -3;
_elementFixedLength[41] = -8;
_elementFixedLength[42] = -15;
_elementFixedLength[43] = -40;
_elementFixedLength[44] = -25;
_elementFixedLength[49] = -3;
_elementFixedLength[50] = -3;
_elementFixedLength[51] = -3;
_elementFixedLength[52] = -8;
_elementFixedLength[53] = 18;
_elementFixedLength[64] = -4;
_elementFixedLength[65] = -16;
_elementFixedLength[66] = 1;
_elementFixedLength[67] = 2;
_elementFixedLength[68] = 3;
_elementFixedLength[69] = 3;
_elementFixedLength[70] = 3;
_elementFixedLength[71] = 4;
_elementFixedLength[73] = 6;
_elementFixedLength[74] = 10;
_elementFixedLength[75] = 10;
_elementFixedLength[76] = 10;
_elementFixedLength[77] = 10;
_elementFixedLength[78] = 10;
_elementFixedLength[79] = 10;
_elementFixedLength[80] = 10;
_elementFixedLength[81] = 10;
_elementFixedLength[82] = 12;
_elementFixedLength[83] = 12;
_elementFixedLength[84] = 12;
_elementFixedLength[85] = 12;
_elementFixedLength[86] = 15;
_elementFixedLength[87] = 15;
_elementFixedLength[88] = 15;
_elementFixedLength[89] = 15;
_elementFixedLength[90] = 42;
_elementFixedLength[91] = -1;
_elementFixedLength[92] = 2;
_elementFixedLength[93] = 5;
_elementFixedLength[94] = -7;
_elementFixedLength[95] = -42;
_elementFixedLength[96] = -8;
_elementFixedLength[97] = 16;
_elementFixedLength[98] = -25;
_elementFixedLength[101] = -17;
_elementFixedLength[128] = -16;
#endregion
}
/// <summary>
/// Parses the specified data elements.
/// </summary>
/// <returns>Data Elements string array</returns>
public string[] Parse(byte[] elements, byte[] bitmap)
{
// create the data elements array
var dataElements = new string[130];
try
{
var primaryBitmap = new byte[8];
var secondaryBitmap = new byte[8];
var secondaryBitmapBinary = string.Empty;
// copy the primary bitmap out of the message bitmap
Buffer.BlockCopy(bitmap, 0, primaryBitmap, 0, 8);
var primaryBitmapBinary = HexStringToBinary(ByteArrayToHex(primaryBitmap));
if (primaryBitmapBinary.Substring(0, 1) == "1")
{
// copy the secondary bitmap out of the message bitmap
Buffer.BlockCopy(bitmap, 8, secondaryBitmap, 0, 8);
secondaryBitmapBinary = HexStringToBinary(ByteArrayToHex(secondaryBitmap));
}
var bitmapBinary = primaryBitmapBinary + secondaryBitmapBinary;
var dataElementValues = Encoding.Default.GetString(elements);
var position = 0;
// loop thru all characters in binary representation
for (var i = 2; i < bitmapBinary.Length; i++)
{
int length;
switch (i)
{
case 2: // Primary account number. Length n..19 (note" .. indicates 2 digit length indicator)
if (bitmapBinary.Substring(i - 1, 1) == "1")
{
length = Convert.ToInt32(dataElementValues.Substring(position, 2));
dataElements[i] = dataElementValues.Substring(0, length);
position = dataElements[i].Length + 2;
}
break;
case 32: // Financial Institute Id. Length n..11
if (bitmapBinary.Substring(i - 1, 1) == "1")
{
length = Convert.ToInt32(dataElementValues.Substring(position, 2));
dataElements[i] = dataElementValues.Substring(position + 2, length);
position = position + dataElements[i].Length + 2;
}
break;
case 44: // Additional response data. Length ..25
if (bitmapBinary.Substring(i - 1, 1) == "1")
{
length = Convert.ToInt32(dataElementValues.Substring(position, 2));
dataElements[i] = dataElementValues.Substring(position + 2, length);
position = position + dataElements[i].Length + 2;
}
break;
case 52:
if (bitmapBinary.Substring(i - 1, 1) == "1")
{
dataElements[i] =
dataElementValues.Substring(position, Math.Abs(_elementFixedLength[i]));
position = position + Math.Abs(_elementFixedLength[i]);
}
break;
case 59: // Echo Data ..255
if (bitmapBinary.Substring(i - 1, 1) == "1")
{
length = Convert.ToInt32(dataElementValues.Substring(position, 3));
dataElements[i] = dataElementValues.Substring(position + 3, length);
position = position + dataElements[i].Length + 3;
}
break;
case 123: // Terminal Type. Length ..15
if (bitmapBinary.Substring(i - 1, 1) == "1")
{
// This field and is made up of a number of sub fields
// Positions 14 and15 from the left are relevant and must be used by the financial institution to indicate
// which type of terminal the transaction originates from.
// The following are possible types
// POS : 01
// ATM : 02
// IVR : 20
// Internet : 90
length = Convert.ToInt32(dataElementValues.Substring(position, 3));
dataElements[i] = dataElementValues.Substring(position + 3, length);
position = position + dataElements[i].Length + 3;
}
break;
case 127:
// This is a variable-length field, consisting of a 3-digit length indicator,
// followed by an 8-byte bit map indicating the presence of fields, followed by the sub-fields.
// 127.3 Routing Information
// 126.6 Authorization Profile
// 127.9 Unique Transaction Id
Field127_3 = string.Empty;
Field127_6 = string.Empty;
Field127_9 = string.Empty;
dataElements[i] = string.Empty;
if (bitmapBinary.Substring(i - 1, 1) == "1")
{
// determine field length including the bitmap
length = Convert.ToInt32(dataElementValues.Substring(position, 3));
var field127Bitmap = new byte[64];
// copy field bitmap into field 127 bitmap
var fieldBitmap = Encoding.UTF8.GetBytes(dataElementValues.Substring(position + 3, 25).Trim());
Buffer.BlockCopy(fieldBitmap, 0, field127Bitmap, 0, fieldBitmap.Length);
var field127BitmapBinary = HexStringToBinary(ByteArrayToHex(field127Bitmap));
field127BitmapBinary = field127BitmapBinary.Substring(0, 9);
position = position + 28;
var values = dataElementValues.Substring(position, length - 25);
// loop thru each item in binary string
for (var ii = 0; ii < field127BitmapBinary.Length + 1; ii++)
{
switch (ii)
{
case 3:
Field127_3 = values.Substring(0, 31);
break;
case 6:
Field127_6 = values.Substring(31, 2);
break;
case 9:
var subFieldLength = Convert.ToInt32(values.Substring(33, 3));
Field127_9 = values.Substring(36, subFieldLength);
break;
}
}
}
break;
default:
// populate all fixed length elements
if (bitmapBinary.Substring(i - 1, 1) == "1")
{
dataElements[i] = dataElementValues.Substring(position, Math.Abs(_elementFixedLength[i]));
position = position + Math.Abs(_elementFixedLength[i]);
}
break;
}
}
return dataElements;
}
catch (Exception ex)
{
Log.WriteLine(ex.ToString());
return dataElements;
}
}
private static string HexStringToBinary(string hex)
{
var binaryValue = string.Join(string.Empty, hex.Select(character => Convert.ToString(Convert.ToInt64(character.ToString(CultureInfo.InvariantCulture), 16), 2)
.PadLeft(4, '0')));
return binaryValue;
}
private static string ByteArrayToHex(byte[] byteArray)
{
var hex = BitConverter.ToString(byteArray);
return hex.Replace("-", "");
}
}
public static string[] Parse(this DataElements)
{
}
}