76 lines
1.6 KiB
C#
76 lines
1.6 KiB
C#
using System;
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using System.Collections;
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using System.IO;
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using Org.BouncyCastle.Math;
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using Org.BouncyCastle.Utilities;
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namespace Org.BouncyCastle.Crypto.Tls;
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public abstract class TlsSrpUtilities
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{
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public static void AddSrpExtension(IDictionary extensions, byte[] identity)
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{
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extensions[12] = CreateSrpExtension(identity);
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}
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public static byte[] GetSrpExtension(IDictionary extensions)
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{
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byte[] extensionData = TlsUtilities.GetExtensionData(extensions, 12);
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if (extensionData != null)
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{
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return ReadSrpExtension(extensionData);
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}
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return null;
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}
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public static byte[] CreateSrpExtension(byte[] identity)
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{
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if (identity == null)
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{
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throw new TlsFatalAlert(80);
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}
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return TlsUtilities.EncodeOpaque8(identity);
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}
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public static byte[] ReadSrpExtension(byte[] extensionData)
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{
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if (extensionData == null)
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{
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throw new ArgumentNullException("extensionData");
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}
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MemoryStream memoryStream = new MemoryStream(extensionData, writable: false);
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byte[] result = TlsUtilities.ReadOpaque8(memoryStream);
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TlsProtocol.AssertEmpty(memoryStream);
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return result;
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}
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public static BigInteger ReadSrpParameter(Stream input)
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{
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return new BigInteger(1, TlsUtilities.ReadOpaque16(input));
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}
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public static void WriteSrpParameter(BigInteger x, Stream output)
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{
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TlsUtilities.WriteOpaque16(BigIntegers.AsUnsignedByteArray(x), output);
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}
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public static bool IsSrpCipherSuite(int cipherSuite)
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{
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switch (cipherSuite)
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{
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case 49178:
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case 49179:
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case 49180:
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case 49181:
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case 49182:
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case 49183:
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case 49184:
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case 49185:
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case 49186:
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return true;
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default:
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return false;
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}
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}
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}
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