/// <summary>
/// Create new Datahasher with given algorithm
/// </summary>
/// <param name="algorithm">Hash algorithm</param>
public DataHasher(HashAlgorithm algorithm)
{
if (algorithm == null)
{
throw new ArgumentNullException(nameof(algorithm));
}
_algorithm = algorithm;
_hasher = GetHasher(algorithm);
}
private static HMAC GetHasher(HashAlgorithm hmacAlgorithm, byte[] key)
{
if (hmacAlgorithm == HashAlgorithm.Sha1)
{
return(new HMACSHA1(key));
}
if (hmacAlgorithm == HashAlgorithm.Sha2256)
{
return(new HMACSHA256(key));
}
if (hmacAlgorithm == HashAlgorithm.Ripemd160)
{
return(new HMACRIPEMD160(key));
}
if (hmacAlgorithm == HashAlgorithm.Sha2384)
{
return(new HMACSHA384(key));
}
if (hmacAlgorithm == HashAlgorithm.Sha2512)
{
return(new HMACSHA512(key));
}
throw new HashingException("Hash algorithm(" + hmacAlgorithm.Name + ") is not supported.");
}
private static System.Security.Cryptography.HashAlgorithm GetHasher(HashAlgorithm algorithm)
{
if (algorithm == HashAlgorithm.Sha1)
{
return(new SHA1CryptoServiceProvider());
}
if (algorithm == HashAlgorithm.Sha2256)
{
return(new SHA256Managed());
}
if (algorithm == HashAlgorithm.Ripemd160)
{
return(new RIPEMD160Managed());
}
if (algorithm == HashAlgorithm.Sha2384)
{
return(new SHA384Managed());
}
if (algorithm == HashAlgorithm.Sha2512)
{
return(new SHA512Managed());
}
throw new HashingException("Hash algorithm(" + algorithm.Name + ") is not supported.");
}
/// <summary>
/// Create new HmacHasher with given algorithm
/// </summary>
/// <param name="algorithm">HMAC algorithm</param>
public HmacHasher(HashAlgorithm algorithm)
{
_algorithm = algorithm;
}
