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66 lines
2.3 KiB
66 lines
2.3 KiB
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR) |
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#pragma warning disable |
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using System; |
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using System.IO; |
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Tls |
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{ |
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public sealed class KeyShareEntry |
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{ |
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private static bool CheckKeyExchangeLength(int length) |
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{ |
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return 0 < length && length < (1 << 16); |
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} |
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private readonly int m_namedGroup; |
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private readonly byte[] m_keyExchange; |
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/// <param name="namedGroup"><see cref="NamedGroup"/></param> |
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/// <param name="keyExchange"></param> |
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public KeyShareEntry(int namedGroup, byte[] keyExchange) |
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{ |
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if (!TlsUtilities.IsValidUint16(namedGroup)) |
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throw new ArgumentException("should be a uint16", "namedGroup"); |
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if (null == keyExchange) |
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throw new ArgumentNullException("keyExchange"); |
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if (!CheckKeyExchangeLength(keyExchange.Length)) |
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throw new ArgumentException("must have length from 1 to (2^16 - 1)", "keyExchange"); |
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this.m_namedGroup = namedGroup; |
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this.m_keyExchange = keyExchange; |
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} |
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/// <returns><see cref="NamedGroup"/></returns> |
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public int NamedGroup |
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{ |
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get { return m_namedGroup; } |
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} |
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public byte[] KeyExchange |
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{ |
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get { return m_keyExchange; } |
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} |
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/// <summary>Encode this <see cref="KeyShareEntry"/> to a <see cref="Stream"/>.</summary> |
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/// <param name="output">the <see cref="Stream"/> to encode to.</param> |
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/// <exception cref="IOException"/> |
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public void Encode(Stream output) |
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{ |
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TlsUtilities.WriteUint16(NamedGroup, output); |
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TlsUtilities.WriteOpaque16(KeyExchange, output); |
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} |
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/// <summary>Parse a <see cref="KeyShareEntry"/> from a <see cref="Stream"/>.</summary> |
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/// <param name="input">the <see cref="Stream"/> to parse from.</param> |
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/// <returns>a <see cref="KeyShareEntry"/> object.</returns> |
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/// <exception cref="IOException"/> |
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public static KeyShareEntry Parse(Stream input) |
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{ |
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int namedGroup = TlsUtilities.ReadUint16(input); |
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byte[] keyExchange = TlsUtilities.ReadOpaque16(input, 1); |
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return new KeyShareEntry(namedGroup, keyExchange); |
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} |
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} |
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} |
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#pragma warning restore |
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#endif
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