To generate x_fp_hash using C# please see the code below:
using System;
using System.Security;
using System.Security.Cryptography;
using System.Text;
class CalculateHash {
static void Main() {
StringBuilder sb = new StringBuilder();
// x_login^x_fp_sequence^x_fp_timestamp^x_amount^x_currency
String x_login = "WSP-ACTIV-70";
String x_fp_sequence = "123";
String x_fp_timestamp = "1228774539";
String x_amount = "100.00";
String x_currency = ""; // default empty
sb.Append(x_login)
.Append("^")
.Append(x_fp_sequence)
.Append("^")
.Append(x_fp_timestamp)
.Append("^")
.Append(x_amount)
.Append("^")
.Append(x_currency);
// Convert string to array of bytes.
byte[] data = Encoding.UTF8.GetBytes(sb.ToString());
// key
byte[] key = Encoding.UTF8.GetBytes("V0WX5fK~o6eEhr7hbs3ZeyxS");
// Create HMAC-MD5 Algorithm;
// HMACMD5 hmac = new HMACMD5(key);
// Create HMAC-SHA1 Algorithm;
HMACSHA1 hmac = new HMACSHA1(key);
// Compute hash.
byte[] hashBytes = hmac.ComputeHash(data);
// Convert to HEX string.
String x_fp_hash = System.BitConverter.ToString(hashBytes).Replace("-", "").toLower();
String msg = String.Format("x_login = {0}, x_fp_sequence = {1}, x_fp_timestamp = {2}, x_amount = {3}, x_currency= {4}.\n x_fp_hash = {5}", x_login, x_fp_sequence, x_fp_timestamp, x_amount, x_currency, x_fp_hash);
System.Console.WriteLine(msg);
}
}
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