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using System;
using System.IO;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Tls
{
public sealed class ServerSrpParams
{
private BigInteger m_N, m_g, m_B;
private byte[] m_s;
public ServerSrpParams(BigInteger N, BigInteger g, byte[] s, BigInteger B)
{
this.m_N = N;
this.m_g = g;
this.m_s = Arrays.Clone(s);
this.m_B = B;
}
public BigInteger B
{
get { return m_B; }
}
public BigInteger G
{
get { return m_g; }
}
public BigInteger N
{
get { return m_N; }
}
public byte[] S
{
get { return m_s; }
}
/// <summary>Encode this <see cref="ServerSrpParams"/> to a <see cref="Stream"/>.</summary>
/// <param name="output">the <see cref="Stream"/> to encode to.</param>
/// <exception cref="IOException"/>
public void Encode(Stream output)
{
TlsSrpUtilities.WriteSrpParameter(m_N, output);
TlsSrpUtilities.WriteSrpParameter(m_g, output);
TlsUtilities.WriteOpaque8(m_s, output);
TlsSrpUtilities.WriteSrpParameter(m_B, output);
}
/// <summary>Parse a <see cref="ServerSrpParams"/> from a <see cref="Stream"/>.</summary>
/// <param name="input">the <see cref="Stream"/> to parse from.</param>
/// <returns>a <see cref="ServerSrpParams"/> object.</returns>
/// <exception cref="IOException"/>
public static ServerSrpParams Parse(Stream input)
{
BigInteger N = TlsSrpUtilities.ReadSrpParameter(input);
BigInteger g = TlsSrpUtilities.ReadSrpParameter(input);
byte[] s = TlsUtilities.ReadOpaque8(input, 1);
BigInteger B = TlsSrpUtilities.ReadSrpParameter(input);
return new ServerSrpParams(N, g, s, B);
}
}
}
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