public static SigningKey GetSigningKey(string publicKey, string privateKey)
{
using (MD5 md5Hash = MD5.Create())
{
SigningKey key = new SigningKey();
key.TimeStamp = CurrentUnixTimeStamp(DateTime.UtcNow).ToString();
key.PublicKey = publicKey;
var input = string.Concat(publicKey, CurrentUnixTimeStamp(DateTime.UtcNow), privateKey);
// Convert the input string to a byte array and compute the hash.
byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(input));
// Create a new Stringbuilder to collect the bytes
// and create a string.
StringBuilder sBuilder = new StringBuilder();
// Loop through each byte of the hashed data
// and format each one as a hexadecimal string.
foreach (byte character in data)
{
sBuilder.Append(character.ToString("x2"));
}
// Return the hexadecimal string.
key.Signature = sBuilder.ToString();
return(key);
}
}
private static string CreateJsonQueryStringWithZipCode(int zipCode)
{
SigningKey signingKey = Utilities.GetSigningKey(_publicKey, _privateKey);
return("{\"ts\": \"" + signingKey.TimeStamp + "\", \"sig\": \"" + signingKey.Signature + "\", \"key\": \"" + signingKey.PublicKey + "\", \"zip\": \"" + zipCode + "\"}");
}
