public static string CalculateShaHash(NameValueCollection parameters, OgoneHashAlgorithm hashAlgorithm,
string passPhrase)
{
var dict = parameters.AllKeys.ToDictionary(k => k.ToUpper(), k => parameters[k]);
var sortedDict = new SortedDictionary <string, string>(dict);
var stringForHashing = string.Empty;
sortedDict.Where(p => !string.IsNullOrWhiteSpace(p.Value))
.ToList()
.ForEach(p => { stringForHashing += string.Concat(p.Key, "=", p.Value, passPhrase); });
var encoding = Encoding.UTF8;
var bytesToHash = encoding.GetBytes(stringForHashing);
using (var sha = GetHashAlgorithm(hashAlgorithm))
{
var hash = sha.ComputeHash(bytesToHash);
var hashString = BitConverter.ToString(hash);
hashString = hashString.Replace("-", string.Empty);
return(hashString);
}
}
private static HashAlgorithm GetHashAlgorithm(OgoneHashAlgorithm hashAlgorithm)
{
switch (hashAlgorithm)
{
case OgoneHashAlgorithm.Sha1:
return(new SHA1Managed());
case OgoneHashAlgorithm.Sha256:
return(new SHA256Managed());
case OgoneHashAlgorithm.Sha512:
return(new SHA512Managed());
default:
return(null);
}
}
