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using System;
using System.Collections;
using System.Globalization;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Iana;
using Org.BouncyCastle.Asn1.Misc;
using Org.BouncyCastle.Asn1.Nist;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.Rosstandart;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Crypto.Macs;
using Org.BouncyCastle.Crypto.Paddings;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Security
{
/// <remarks>
/// Utility class for creating HMac object from their names/Oids
/// </remarks>
public sealed class MacUtilities
{
private MacUtilities()
{
}
private static readonly IDictionary algorithms = Platform.CreateHashtable();
//private static readonly IDictionary oids = Platform.CreateHashtable();
static MacUtilities()
{
algorithms[IanaObjectIdentifiers.HmacMD5.Id] = "HMAC-MD5";
algorithms[IanaObjectIdentifiers.HmacRipeMD160.Id] = "HMAC-RIPEMD160";
algorithms[IanaObjectIdentifiers.HmacSha1.Id] = "HMAC-SHA1";
algorithms[IanaObjectIdentifiers.HmacTiger.Id] = "HMAC-TIGER";
algorithms[PkcsObjectIdentifiers.IdHmacWithSha1.Id] = "HMAC-SHA1";
algorithms[MiscObjectIdentifiers.HMAC_SHA1.Id] = "HMAC-SHA1";
algorithms[PkcsObjectIdentifiers.IdHmacWithSha224.Id] = "HMAC-SHA224";
algorithms[PkcsObjectIdentifiers.IdHmacWithSha256.Id] = "HMAC-SHA256";
algorithms[PkcsObjectIdentifiers.IdHmacWithSha384.Id] = "HMAC-SHA384";
algorithms[PkcsObjectIdentifiers.IdHmacWithSha512.Id] = "HMAC-SHA512";
algorithms[NistObjectIdentifiers.IdHMacWithSha3_224.Id] = "HMAC-SHA3-224";
algorithms[NistObjectIdentifiers.IdHMacWithSha3_256.Id] = "HMAC-SHA3-256";
algorithms[NistObjectIdentifiers.IdHMacWithSha3_384.Id] = "HMAC-SHA3-384";
algorithms[NistObjectIdentifiers.IdHMacWithSha3_512.Id] = "HMAC-SHA3-512";
algorithms[RosstandartObjectIdentifiers.id_tc26_hmac_gost_3411_12_256.Id] = "HMAC-GOST3411-2012-256";
algorithms[RosstandartObjectIdentifiers.id_tc26_hmac_gost_3411_12_512.Id] = "HMAC-GOST3411-2012-512";
// TODO AESMAC?
algorithms["DES"] = "DESMAC";
algorithms["DES/CFB8"] = "DESMAC/CFB8";
algorithms["DES64"] = "DESMAC64";
algorithms["DESEDE"] = "DESEDEMAC";
algorithms[PkcsObjectIdentifiers.DesEde3Cbc.Id] = "DESEDEMAC";
algorithms["DESEDE/CFB8"] = "DESEDEMAC/CFB8";
algorithms["DESISO9797MAC"] = "DESWITHISO9797";
algorithms["DESEDE64"] = "DESEDEMAC64";
algorithms["DESEDE64WITHISO7816-4PADDING"] = "DESEDEMAC64WITHISO7816-4PADDING";
algorithms["DESEDEISO9797ALG1MACWITHISO7816-4PADDING"] = "DESEDEMAC64WITHISO7816-4PADDING";
algorithms["DESEDEISO9797ALG1WITHISO7816-4PADDING"] = "DESEDEMAC64WITHISO7816-4PADDING";
algorithms["ISO9797ALG3"] = "ISO9797ALG3MAC";
algorithms["ISO9797ALG3MACWITHISO7816-4PADDING"] = "ISO9797ALG3WITHISO7816-4PADDING";
algorithms["SKIPJACK"] = "SKIPJACKMAC";
algorithms["SKIPJACK/CFB8"] = "SKIPJACKMAC/CFB8";
algorithms["IDEA"] = "IDEAMAC";
algorithms["IDEA/CFB8"] = "IDEAMAC/CFB8";
algorithms["RC2"] = "RC2MAC";
algorithms["RC2/CFB8"] = "RC2MAC/CFB8";
algorithms["RC5"] = "RC5MAC";
algorithms["RC5/CFB8"] = "RC5MAC/CFB8";
algorithms["GOST28147"] = "GOST28147MAC";
algorithms["VMPC"] = "VMPCMAC";
algorithms["VMPC-MAC"] = "VMPCMAC";
algorithms["SIPHASH"] = "SIPHASH-2-4";
algorithms["PBEWITHHMACSHA"] = "PBEWITHHMACSHA1";
algorithms["1.3.14.3.2.26"] = "PBEWITHHMACSHA1";
}
// /// <summary>
// /// Returns a ObjectIdentifier for a given digest mechanism.
// /// </summary>
// /// <param name="mechanism">A string representation of the digest meanism.</param>
// /// <returns>A DerObjectIdentifier, null if the Oid is not available.</returns>
// public static DerObjectIdentifier GetObjectIdentifier(
// string mechanism)
// {
// mechanism = (string) algorithms[Platform.ToUpperInvariant(mechanism)];
//
// if (mechanism != null)
// {
// return (DerObjectIdentifier)oids[mechanism];
// }
//
// return null;
// }
// public static ICollection Algorithms
// {
// get { return oids.Keys; }
// }
public static IMac GetMac(
DerObjectIdentifier id)
{
return GetMac(id.Id);
}
public static IMac GetMac(
string algorithm)
{
string upper = Platform.ToUpperInvariant(algorithm);
string mechanism = (string) algorithms[upper];
if (mechanism == null)
{
mechanism = upper;
}
if (Platform.StartsWith(mechanism, "PBEWITH"))
{
mechanism = mechanism.Substring("PBEWITH".Length);
}
if (Platform.StartsWith(mechanism, "HMAC"))
{
string digestName;
if (Platform.StartsWith(mechanism, "HMAC-") || Platform.StartsWith(mechanism, "HMAC/"))
{
digestName = mechanism.Substring(5);
}
else
{
digestName = mechanism.Substring(4);
}
return new HMac(DigestUtilities.GetDigest(digestName));
}
if (mechanism == "AESCMAC")
{
return new CMac(new AesEngine());
}
if (mechanism == "DESMAC")
{
return new CbcBlockCipherMac(new DesEngine());
}
if (mechanism == "DESMAC/CFB8")
{
return new CfbBlockCipherMac(new DesEngine());
}
if (mechanism == "DESMAC64")
{
return new CbcBlockCipherMac(new DesEngine(), 64);
}
if (mechanism == "DESEDECMAC")
{
return new CMac(new DesEdeEngine());
}
if (mechanism == "DESEDEMAC")
{
return new CbcBlockCipherMac(new DesEdeEngine());
}
if (mechanism == "DESEDEMAC/CFB8")
{
return new CfbBlockCipherMac(new DesEdeEngine());
}
if (mechanism == "DESEDEMAC64")
{
return new CbcBlockCipherMac(new DesEdeEngine(), 64);
}
if (mechanism == "DESEDEMAC64WITHISO7816-4PADDING")
{
return new CbcBlockCipherMac(new DesEdeEngine(), 64, new ISO7816d4Padding());
}
if (mechanism == "DESWITHISO9797"
|| mechanism == "ISO9797ALG3MAC")
{
return new ISO9797Alg3Mac(new DesEngine());
}
if (mechanism == "ISO9797ALG3WITHISO7816-4PADDING")
{
return new ISO9797Alg3Mac(new DesEngine(), new ISO7816d4Padding());
}
if (mechanism == "SKIPJACKMAC")
{
return new CbcBlockCipherMac(new SkipjackEngine());
}
if (mechanism == "SKIPJACKMAC/CFB8")
{
return new CfbBlockCipherMac(new SkipjackEngine());
}
if (mechanism == "IDEAMAC")
{
return new CbcBlockCipherMac(new IdeaEngine());
}
if (mechanism == "IDEAMAC/CFB8")
{
return new CfbBlockCipherMac(new IdeaEngine());
}
if (mechanism == "RC2MAC")
{
return new CbcBlockCipherMac(new RC2Engine());
}
if (mechanism == "RC2MAC/CFB8")
{
return new CfbBlockCipherMac(new RC2Engine());
}
if (mechanism == "RC5MAC")
{
return new CbcBlockCipherMac(new RC532Engine());
}
if (mechanism == "RC5MAC/CFB8")
{
return new CfbBlockCipherMac(new RC532Engine());
}
if (mechanism == "GOST28147MAC")
{
return new Gost28147Mac();
}
if (mechanism == "VMPCMAC")
{
return new VmpcMac();
}
if (mechanism == "SIPHASH-2-4")
{
return new SipHash();
}
throw new SecurityUtilityException("Mac " + mechanism + " not recognised.");
}
public static string GetAlgorithmName(
DerObjectIdentifier oid)
{
return (string) algorithms[oid.Id];
}
public static byte[] CalculateMac(string algorithm, ICipherParameters cp, byte[] input)
{
IMac mac = GetMac(algorithm);
mac.Init(cp);
mac.BlockUpdate(input, 0, input.Length);
return DoFinal(mac);
}
public static byte[] DoFinal(IMac mac)
{
byte[] b = new byte[mac.GetMacSize()];
mac.DoFinal(b, 0);
return b;
}
public static byte[] DoFinal(IMac mac, byte[] input)
{
mac.BlockUpdate(input, 0, input.Length);
return DoFinal(mac);
}
}
}
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