HashAlgorithm
RFC 5246 7.4.1.4.1
namespace Org.BouncyCastle.Tls
{
public abstract class HashAlgorithm
{
public const short none = 0;
public const short md5 = 1;
public const short sha1 = 2;
public const short sha224 = 3;
public const short sha256 = 4;
public const short sha384 = 5;
public const short sha512 = 6;
public const short Intrinsic = 8;
public static string GetName(short hashAlgorithm)
{
switch (hashAlgorithm) {
case 0:
return "none";
case 1:
return "md5";
case 2:
return "sha1";
case 3:
return "sha224";
case 4:
return "sha256";
case 5:
return "sha384";
case 6:
return "sha512";
case 8:
return "Intrinsic";
default:
return "UNKNOWN";
}
}
public static int GetOutputSize(short hashAlgorithm)
{
switch (hashAlgorithm) {
case 1:
return 16;
case 2:
return 20;
case 3:
return 28;
case 4:
return 32;
case 5:
return 48;
case 6:
return 64;
default:
return -1;
}
}
public static string GetText(short hashAlgorithm)
{
return GetName(hashAlgorithm) + "(" + hashAlgorithm.ToString() + ")";
}
public static bool IsPrivate(short hashAlgorithm)
{
if (224 <= hashAlgorithm)
return hashAlgorithm <= 255;
return false;
}
public static bool IsRecognized(short hashAlgorithm)
{
if ((uint)(hashAlgorithm - 1) <= 5 || hashAlgorithm == 8)
return true;
return false;
}
}
}