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using System;
namespace Org.BouncyCastle.Tls
{
/// <summary>RFC 5246 7.4.1.4.1</summary>
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;
/*
* RFC 8422
*/
public const short Intrinsic = 8;
public static string GetName(short hashAlgorithm)
{
switch (hashAlgorithm)
{
case none:
return "none";
case md5:
return "md5";
case sha1:
return "sha1";
case sha224:
return "sha224";
case sha256:
return "sha256";
case sha384:
return "sha384";
case sha512:
return "sha512";
case Intrinsic:
return "Intrinsic";
default:
return "UNKNOWN";
}
}
public static int GetOutputSize(short hashAlgorithm)
{
switch (hashAlgorithm)
{
case md5:
return 16;
case sha1:
return 20;
case sha224:
return 28;
case sha256:
return 32;
case sha384:
return 48;
case sha512:
return 64;
default:
return -1;
}
}
public static string GetText(short hashAlgorithm)
{
return GetName(hashAlgorithm) + "(" + hashAlgorithm + ")";
}
public static bool IsPrivate(short hashAlgorithm)
{
return 224 <= hashAlgorithm && hashAlgorithm <= 255;
}
public static bool IsRecognized(short hashAlgorithm)
{
switch (hashAlgorithm)
{
case md5:
case sha1:
case sha224:
case sha256:
case sha384:
case sha512:
case Intrinsic:
return true;
default:
return false;
}
}
}
}
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