# < Summary

Information

Class: | Renci.SshNet.Security.KeyExchange
Assembly: | Renci.SshNet
File(s): | \home\appveyor\projects\ssh-net\src\Renci.SshNet\Security\KeyExchange.cs

Line coverage
87%

Covered lines: | 200
Uncovered lines: | 29
Coverable lines: | 229
Total lines: | 550
Line coverage: | 87.3%

Branch coverage
61%

Covered branches: | 21
Total branches: | 34
Branch coverage: | 61.7%

Method coverage

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# Metrics

Method | Branch coverage | Cyclomatic complexity | Line coverage
--- | --- | --- | ---
get_Session() | 100% | 1 | 100%
get_SharedKey() | 100% | 1 | 100%
get_ExchangeHash() | 100% | 2 | 100%
Start(...) | 50% | 12 | 79.31%
Finish() | 100% | 2 | 100%
CreateServerCipher() | 50% | 2 | 100%
CreateClientCipher() | 50% | 2 | 100%
CreateServerHash() | 50% | 2 | 100%
CreateClientHash() | 50% | 2 | 100%
CreateCompressor() | 50% | 2 | 45.45%
CreateDecompressor() | 50% | 2 | 45.45%
CanTrustHostKey(...) | 50% | 2 | 88.88%
ValidateExchangeHash(...) | 100% | 2 | 100%
SendMessage(...) | 100% | 1 | 100%
GenerateSessionKey(...) | 100% | 2 | 100%
GenerateSessionKey(...) | 100% | 1 | 100%
get_SharedKey() | 100% | 1 | 100%
get_ExchangeHash() | 100% | 1 | 100%
get_Char() | 100% | 1 | 100%
get_SessionId() | 100% | 1 | 100%
get_BufferCapacity() | 100% | 1 | 100%
LoadData() | 100% | 1 | 0%
SaveData() | 100% | 1 | 100%
get_SharedKey() | 100% | 1 | 100%
get_ExchangeHash() | 100% | 1 | 100%
get_Key() | 100% | 1 | 100%
get_BufferCapacity() | 100% | 1 | 100%
LoadData() | 100% | 1 | 0%
SaveData() | 100% | 1 | 100%
Dispose() | 100% | 1 | 100%
Dispose(...) | 100% | 1 | 100%
Finalize() | 100% | 1 | 100%

# File(s)

## \home\appveyor\projects\ssh-net\src\Renci.SshNet\Security\KeyExchange.cs

| # | Line |  | Line coverage
--- | --- | --- | --- | ---
|  | `1` |  | `using System;`
|  | `2` |  | `using System.Collections.Generic;`
|  | `3` |  | `using System.Linq;`
|  | `4` |  | `using System.Security.Cryptography;`
|  | `5` |  | ``
|  | `6` |  | `using Renci.SshNet.Abstractions;`
|  | `7` |  | `using Renci.SshNet.Common;`
|  | `8` |  | `using Renci.SshNet.Compression;`
|  | `9` |  | `using Renci.SshNet.Messages;`
|  | `10` |  | `using Renci.SshNet.Messages.Transport;`
|  | `11` |  | `using Renci.SshNet.Security.Cryptography;`
|  | `12` |  | ``
|  | `13` |  | `namespace Renci.SshNet.Security`
|  | `14` |  | `{`
|  | `15` |  | `/// <summary>`
|  | `16` |  | `/// Represents base class for different key exchange algorithm implementations.`
|  | `17` |  | `/// </summary>`
|  | `18` |  | `public abstract class KeyExchange : Algorithm, IKeyExchange`
|  | `19` |  | `{`
|  | `20` |  | `private CipherInfo _clientCipherInfo;`
|  | `21` |  | `private CipherInfo _serverCipherInfo;`
|  | `22` |  | `private HashInfo _clientHashInfo;`
|  | `23` |  | `private HashInfo _serverHashInfo;`
|  | `24` |  | `private Type _compressionType;`
|  | `25` |  | `private Type _decompressionType;`
|  | `26` |  | ``
|  | `27` |  | `/// <summary>`
|  | `28` |  | `/// Gets the session.`
|  | `29` |  | `/// </summary>`
|  | `30` |  | `/// <value>`
|  | `31` |  | `/// The session.`
|  | `32` |  | `/// </value>`
| 32399 | `33` |  | `protected Session Session { get; private set; }`
|  | `34` |  | ``
|  | `35` |  | `/// <summary>`
|  | `36` |  | `/// Gets or sets key exchange shared key.`
|  | `37` |  | `/// </summary>`
|  | `38` |  | `/// <value>`
|  | `39` |  | `/// The shared key.`
|  | `40` |  | `/// </value>`
| 15576 | `41` |  | `public byte[] SharedKey { get; protected set; }`
|  | `42` |  | ``
|  | `43` |  | `private byte[] _exchangeHash;`
|  | `44` |  | ``
|  | `45` |  | `/// <summary>`
|  | `46` |  | `/// Gets the exchange hash.`
|  | `47` |  | `/// </summary>`
|  | `48` |  | `/// <value>The exchange hash.</value>`
|  | `49` |  | `public byte[] ExchangeHash`
|  | `50` |  | `{`
|  | `51` |  | `get`
| 13178 | `52` |  | `{`
| 13178 | `53` |  | `_exchangeHash ??= CalculateHash();`
|  | `54` |  | ``
| 13178 | `55` |  | `return _exchangeHash;`
| 13178 | `56` |  | `}`
|  | `57` |  | `}`
|  | `58` |  | ``
|  | `59` |  | `/// <summary>`
|  | `60` |  | `/// Occurs when host key received.`
|  | `61` |  | `/// </summary>`
|  | `62` |  | `public event EventHandler<HostKeyEventArgs> HostKeyReceived;`
|  | `63` |  | ``
|  | `64` |  | `/// <summary>`
|  | `65` |  | `/// Starts key exchange algorithm.`
|  | `66` |  | `/// </summary>`
|  | `67` |  | `/// <param name="session">The session.</param>`
|  | `68` |  | `/// <param name="message">Key exchange init message.</param>`
|  | `69` |  | `public virtual void Start(Session session, KeyExchangeInitMessage message)`
| 1199 | `70` |  | `{`
| 1199 | `71` |  | `Session = session;`
|  | `72` |  | ``
| 1199 | `73` |  | `SendMessage(session.ClientInitMessage);`
|  | `74` |  | ``
|  | `75` |  | `// Determine encryption algorithm`
| 1199 | `76` |  | `var clientEncryptionAlgorithmName = (from b in session.ConnectionInfo.Encryptions.Keys`
| 3702 | `77` |  | `from a in message.EncryptionAlgorithmsClientToServer`
| 2440 | `78` |  | `where a == b`
| 2398 | `79` |  | `select a).FirstOrDefault();`
|  | `80` |  | ``
| 1199 | `81` |  | `if (string.IsNullOrEmpty(clientEncryptionAlgorithmName))`
| 0 | `82` |  | `{`
| 0 | `83` |  | `throw new SshConnectionException("Client encryption algorithm not found", DisconnectReason.KeyExchangeFa`
|  | `84` |  | `}`
|  | `85` |  | ``
| 1199 | `86` |  | `session.ConnectionInfo.CurrentClientEncryption = clientEncryptionAlgorithmName;`
|  | `87` |  | ``
|  | `88` |  | `// Determine encryption algorithm`
| 1199 | `89` |  | `var serverDecryptionAlgorithmName = (from b in session.ConnectionInfo.Encryptions.Keys`
| 3702 | `90` |  | `from a in message.EncryptionAlgorithmsServerToClient`
| 2440 | `91` |  | `where a == b`
| 2398 | `92` |  | `select a).FirstOrDefault();`
| 1199 | `93` |  | `if (string.IsNullOrEmpty(serverDecryptionAlgorithmName))`
| 0 | `94` |  | `{`
| 0 | `95` |  | `throw new SshConnectionException("Server decryption algorithm not found", DisconnectReason.KeyExchangeFa`
|  | `96` |  | `}`
|  | `97` |  | ``
| 1199 | `98` |  | `session.ConnectionInfo.CurrentServerEncryption = serverDecryptionAlgorithmName;`
|  | `99` |  | ``
|  | `100` |  | `// Determine client hmac algorithm`
| 1199 | `101` |  | `var clientHmacAlgorithmName = (from b in session.ConnectionInfo.HmacAlgorithms.Keys`
| 39105 | `102` |  | `from a in message.MacAlgorithmsClientToServer`
| 35496 | `103` |  | `where a == b`
| 2398 | `104` |  | `select a).FirstOrDefault();`
| 1199 | `105` |  | `if (string.IsNullOrEmpty(clientHmacAlgorithmName))`
| 0 | `106` |  | `{`
| 0 | `107` |  | `throw new SshConnectionException("Server HMAC algorithm not found", DisconnectReason.KeyExchangeFailed);`
|  | `108` |  | `}`
|  | `109` |  | ``
| 1199 | `110` |  | `session.ConnectionInfo.CurrentClientHmacAlgorithm = clientHmacAlgorithmName;`
|  | `111` |  | ``
|  | `112` |  | `// Determine server hmac algorithm`
| 1199 | `113` |  | `var serverHmacAlgorithmName = (from b in session.ConnectionInfo.HmacAlgorithms.Keys`
| 39105 | `114` |  | `from a in message.MacAlgorithmsServerToClient`
| 35496 | `115` |  | `where a == b`
| 2398 | `116` |  | `select a).FirstOrDefault();`
| 1199 | `117` |  | `if (string.IsNullOrEmpty(serverHmacAlgorithmName))`
| 0 | `118` |  | `{`
| 0 | `119` |  | `throw new SshConnectionException("Server HMAC algorithm not found", DisconnectReason.KeyExchangeFailed);`
|  | `120` |  | `}`
|  | `121` |  | ``
| 1199 | `122` |  | `session.ConnectionInfo.CurrentServerHmacAlgorithm = serverHmacAlgorithmName;`
|  | `123` |  | ``
|  | `124` |  | `// Determine compression algorithm`
| 1199 | `125` |  | `var compressionAlgorithmName = (from b in session.ConnectionInfo.CompressionAlgorithms.Keys`
| 3597 | `126` |  | `from a in message.CompressionAlgorithmsClientToServer`
| 2398 | `127` |  | `where a == b`
| 2398 | `128` |  | `select a).LastOrDefault();`
| 1199 | `129` |  | `if (string.IsNullOrEmpty(compressionAlgorithmName))`
| 0 | `130` |  | `{`
| 0 | `131` |  | `throw new SshConnectionException("Compression algorithm not found", DisconnectReason.KeyExchangeFailed);`
|  | `132` |  | `}`
|  | `133` |  | ``
| 1199 | `134` |  | `session.ConnectionInfo.CurrentClientCompressionAlgorithm = compressionAlgorithmName;`
|  | `135` |  | ``
|  | `136` |  | `// Determine decompression algorithm`
| 1199 | `137` |  | `var decompressionAlgorithmName = (from b in session.ConnectionInfo.CompressionAlgorithms.Keys`
| 3597 | `138` |  | `from a in message.CompressionAlgorithmsServerToClient`
| 2398 | `139` |  | `where a == b`
| 2398 | `140` |  | `select a).LastOrDefault();`
| 1199 | `141` |  | `if (string.IsNullOrEmpty(decompressionAlgorithmName))`
| 0 | `142` |  | `{`
| 0 | `143` |  | `throw new SshConnectionException("Decompression algorithm not found", DisconnectReason.KeyExchangeFailed`
|  | `144` |  | `}`
|  | `145` |  | ``
| 1199 | `146` |  | `session.ConnectionInfo.CurrentServerCompressionAlgorithm = decompressionAlgorithmName;`
|  | `147` |  | ``
| 1199 | `148` |  | `_clientCipherInfo = session.ConnectionInfo.Encryptions[clientEncryptionAlgorithmName];`
| 1199 | `149` |  | `_serverCipherInfo = session.ConnectionInfo.Encryptions[serverDecryptionAlgorithmName];`
| 1199 | `150` |  | `_clientHashInfo = session.ConnectionInfo.HmacAlgorithms[clientHmacAlgorithmName];`
| 1199 | `151` |  | `_serverHashInfo = session.ConnectionInfo.HmacAlgorithms[serverHmacAlgorithmName];`
| 1199 | `152` |  | `_compressionType = session.ConnectionInfo.CompressionAlgorithms[compressionAlgorithmName];`
| 1199 | `153` |  | `_decompressionType = session.ConnectionInfo.CompressionAlgorithms[decompressionAlgorithmName];`
| 1199 | `154` |  | `}`
|  | `155` |  | ``
|  | `156` |  | `/// <summary>`
|  | `157` |  | `/// Finishes key exchange algorithm.`
|  | `158` |  | `/// </summary>`
|  | `159` |  | `public virtual void Finish()`
| 1199 | `160` |  | `{`
| 1199 | `161` |  | `if (!ValidateExchangeHash())`
| 1 | `162` |  | `{`
| 1 | `163` |  | `throw new SshConnectionException("Key exchange negotiation failed.", DisconnectReason.KeyExchangeFailed)`
|  | `164` |  | `}`
|  | `165` |  | ``
| 1198 | `166` |  | `SendMessage(new NewKeysMessage());`
| 1198 | `167` |  | `}`
|  | `168` |  | ``
|  | `169` |  | `/// <summary>`
|  | `170` |  | `/// Creates the server side cipher to use.`
|  | `171` |  | `/// </summary>`
|  | `172` |  | `/// <returns>Server cipher.</returns>`
|  | `173` |  | `public Cipher CreateServerCipher()`
| 1198 | `174` |  | `{`
|  | `175` |  | `// Resolve Session ID`
| 1198 | `176` |  | `var sessionId = Session.SessionId ?? ExchangeHash;`
|  | `177` |  | ``
|  | `178` |  | `// Calculate server to client initial IV`
| 1198 | `179` |  | `var serverVector = Hash(GenerateSessionKey(SharedKey, ExchangeHash, 'B', sessionId));`
|  | `180` |  | ``
|  | `181` |  | `// Calculate server to client encryption`
| 1198 | `182` |  | `var serverKey = Hash(GenerateSessionKey(SharedKey, ExchangeHash, 'D', sessionId));`
|  | `183` |  | ``
| 1198 | `184` |  | `serverKey = GenerateSessionKey(SharedKey, ExchangeHash, serverKey, _serverCipherInfo.KeySize / 8);`
|  | `185` |  | ``
| 1198 | `186` |  | `DiagnosticAbstraction.Log(string.Format("[{0}] Creating {1} server cipher.",`
| 1198 | `187` |  | `Session.ToHex(Session.SessionId),`
| 1198 | `188` |  | `Session.ConnectionInfo.CurrentServerEncryption));`
|  | `189` |  | ``
|  | `190` |  | `// Create server cipher`
| 1198 | `191` |  | `return _serverCipherInfo.Cipher(serverKey, serverVector);`
| 1198 | `192` |  | `}`
|  | `193` |  | ``
|  | `194` |  | `/// <summary>`
|  | `195` |  | `/// Creates the client side cipher to use.`
|  | `196` |  | `/// </summary>`
|  | `197` |  | `/// <returns>Client cipher.</returns>`
|  | `198` |  | `public Cipher CreateClientCipher()`
| 1198 | `199` |  | `{`
|  | `200` |  | `// Resolve Session ID`
| 1198 | `201` |  | `var sessionId = Session.SessionId ?? ExchangeHash;`
|  | `202` |  | ``
|  | `203` |  | `// Calculate client to server initial IV`
| 1198 | `204` |  | `var clientVector = Hash(GenerateSessionKey(SharedKey, ExchangeHash, 'A', sessionId));`
|  | `205` |  | ``
|  | `206` |  | `// Calculate client to server encryption`
| 1198 | `207` |  | `var clientKey = Hash(GenerateSessionKey(SharedKey, ExchangeHash, 'C', sessionId));`
|  | `208` |  | ``
| 1198 | `209` |  | `clientKey = GenerateSessionKey(SharedKey, ExchangeHash, clientKey, _clientCipherInfo.KeySize / 8);`
|  | `210` |  | ``
| 1198 | `211` |  | `DiagnosticAbstraction.Log(string.Format("[{0}] Creating {1} client cipher.",`
| 1198 | `212` |  | `Session.ToHex(Session.SessionId),`
| 1198 | `213` |  | `Session.ConnectionInfo.CurrentClientEncryption));`
|  | `214` |  | ``
|  | `215` |  | `// Create client cipher`
| 1198 | `216` |  | `return _clientCipherInfo.Cipher(clientKey, clientVector);`
| 1198 | `217` |  | `}`
|  | `218` |  | ``
|  | `219` |  | `/// <summary>`
|  | `220` |  | `/// Creates the server side hash algorithm to use.`
|  | `221` |  | `/// </summary>`
|  | `222` |  | `/// <returns>`
|  | `223` |  | `/// The server-side hash algorithm.`
|  | `224` |  | `/// </returns>`
|  | `225` |  | `public HashAlgorithm CreateServerHash()`
| 1198 | `226` |  | `{`
|  | `227` |  | `// Resolve Session ID`
| 1198 | `228` |  | `var sessionId = Session.SessionId ?? ExchangeHash;`
|  | `229` |  | ``
| 1198 | `230` |  | `var serverKey = GenerateSessionKey(SharedKey,`
| 1198 | `231` |  | `ExchangeHash,`
| 1198 | `232` |  | `Hash(GenerateSessionKey(SharedKey, ExchangeHash, 'F', sessionId)),`
| 1198 | `233` |  | `_serverHashInfo.KeySize / 8);`
|  | `234` |  | ``
| 1198 | `235` |  | `DiagnosticAbstraction.Log(string.Format("[{0}] Creating {1} server hmac algorithm.",`
| 1198 | `236` |  | `Session.ToHex(Session.SessionId),`
| 1198 | `237` |  | `Session.ConnectionInfo.CurrentServerHmacAlgorithm));`
|  | `238` |  | ``
| 1198 | `239` |  | `return _serverHashInfo.HashAlgorithm(serverKey);`
| 1198 | `240` |  | `}`
|  | `241` |  | ``
|  | `242` |  | `/// <summary>`
|  | `243` |  | `/// Creates the client side hash algorithm to use.`
|  | `244` |  | `/// </summary>`
|  | `245` |  | `/// <returns>`
|  | `246` |  | `/// The client-side hash algorithm.`
|  | `247` |  | `/// </returns>`
|  | `248` |  | `public HashAlgorithm CreateClientHash()`
| 1198 | `249` |  | `{`
|  | `250` |  | `// Resolve Session ID`
| 1198 | `251` |  | `var sessionId = Session.SessionId ?? ExchangeHash;`
|  | `252` |  | ``
| 1198 | `253` |  | `var clientKey = GenerateSessionKey(SharedKey,`
| 1198 | `254` |  | `ExchangeHash,`
| 1198 | `255` |  | `Hash(GenerateSessionKey(SharedKey, ExchangeHash, 'E', sessionId)),`
| 1198 | `256` |  | `_clientHashInfo.KeySize / 8);`
|  | `257` |  | ``
| 1198 | `258` |  | `DiagnosticAbstraction.Log(string.Format("[{0}] Creating {1} client hmac algorithm.",`
| 1198 | `259` |  | `Session.ToHex(Session.SessionId),`
| 1198 | `260` |  | `Session.ConnectionInfo.CurrentClientHmacAlgorithm));`
|  | `261` |  | ``
| 1198 | `262` |  | `return _clientHashInfo.HashAlgorithm(clientKey);`
| 1198 | `263` |  | `}`
|  | `264` |  | ``
|  | `265` |  | `/// <summary>`
|  | `266` |  | `/// Creates the compression algorithm to use to deflate data.`
|  | `267` |  | `/// </summary>`
|  | `268` |  | `/// <returns>`
|  | `269` |  | `/// The compression method.`
|  | `270` |  | `/// </returns>`
|  | `271` |  | `public Compressor CreateCompressor()`
| 1198 | `272` |  | `{`
| 1198 | `273` |  | `if (_compressionType is null)`
| 1198 | `274` |  | `{`
| 1198 | `275` |  | `return null;`
|  | `276` |  | `}`
|  | `277` |  | ``
| 0 | `278` |  | `DiagnosticAbstraction.Log(string.Format("[{0}] Creating {1} client compressor.",`
| 0 | `279` |  | `Session.ToHex(Session.SessionId),`
| 0 | `280` |  | `Session.ConnectionInfo.CurrentClientCompressionAlgorithm));`
|  | `281` |  | ``
| 0 | `282` |  | `var compressor = _compressionType.CreateInstance<Compressor>();`
|  | `283` |  | ``
| 0 | `284` |  | `compressor.Init(Session);`
|  | `285` |  | ``
| 0 | `286` |  | `return compressor;`
| 1198 | `287` |  | `}`
|  | `288` |  | ``
|  | `289` |  | `/// <summary>`
|  | `290` |  | `/// Creates the compression algorithm to use to inflate data.`
|  | `291` |  | `/// </summary>`
|  | `292` |  | `/// <returns>`
|  | `293` |  | `/// The decompression method.`
|  | `294` |  | `/// </returns>`
|  | `295` |  | `public Compressor CreateDecompressor()`
| 1198 | `296` |  | `{`
| 1198 | `297` |  | `if (_decompressionType is null)`
| 1198 | `298` |  | `{`
| 1198 | `299` |  | `return null;`
|  | `300` |  | `}`
|  | `301` |  | ``
| 0 | `302` |  | `DiagnosticAbstraction.Log(string.Format("[{0}] Creating {1} server decompressor.",`
| 0 | `303` |  | `Session.ToHex(Session.SessionId),`
| 0 | `304` |  | `Session.ConnectionInfo.CurrentServerCompressionAlgorithm));`
|  | `305` |  | ``
| 0 | `306` |  | `var decompressor = _decompressionType.CreateInstance<Compressor>();`
|  | `307` |  | ``
| 0 | `308` |  | `decompressor.Init(Session);`
|  | `309` |  | ``
| 0 | `310` |  | `return decompressor;`
| 1198 | `311` |  | `}`
|  | `312` |  | ``
|  | `313` |  | `/// <summary>`
|  | `314` |  | `/// Determines whether the specified host key can be trusted.`
|  | `315` |  | `/// </summary>`
|  | `316` |  | `/// <param name="host">The host algorithm.</param>`
|  | `317` |  | `/// <returns>`
|  | `318` |  | `/// <see langword="true"/> if the specified host can be trusted; otherwise, <see langword="false"/>.`
|  | `319` |  | `/// </returns>`
|  | `320` |  | `protected bool CanTrustHostKey(KeyHostAlgorithm host)`
| 1199 | `321` |  | `{`
| 1199 | `322` |  | `var handlers = HostKeyReceived;`
| 1199 | `323` |  | `if (handlers != null)`
| 1199 | `324` |  | `{`
| 1199 | `325` |  | `var args = new HostKeyEventArgs(host);`
| 1199 | `326` |  | `handlers(this, args);`
| 1199 | `327` |  | `return args.CanTrust;`
|  | `328` |  | `}`
|  | `329` |  | ``
| 0 | `330` |  | `return true;`
| 1199 | `331` |  | `}`
|  | `332` |  | ``
|  | `333` |  | `/// <summary>`
|  | `334` |  | `/// Validates the exchange hash.`
|  | `335` |  | `/// </summary>`
|  | `336` |  | `/// <returns>true if exchange hash is valid; otherwise false.</returns>`
|  | `337` |  | `protected abstract bool ValidateExchangeHash();`
|  | `338` |  | ``
|  | `339` |  | `private protected bool ValidateExchangeHash(byte[] encodedKey, byte[] encodedSignature)`
| 1199 | `340` |  | `{`
| 1199 | `341` |  | `var exchangeHash = CalculateHash();`
|  | `342` |  | ``
| 1199 | `343` |  | `var signatureData = new KeyHostAlgorithm.SignatureKeyData();`
| 1199 | `344` |  | `signatureData.Load(encodedSignature);`
|  | `345` |  | ``
| 1199 | `346` |  | `var keyAlgorithm = Session.ConnectionInfo.HostKeyAlgorithms[signatureData.AlgorithmName](encodedKey);`
|  | `347` |  | ``
| 1199 | `348` |  | `Session.ConnectionInfo.CurrentHostKeyAlgorithm = signatureData.AlgorithmName;`
|  | `349` |  | ``
| 1199 | `350` |  | `if (CanTrustHostKey(keyAlgorithm))`
| 1198 | `351` |  | `{`
|  | `352` |  | `// keyAlgorithm.VerifySignature decodes the signature data before verifying.`
|  | `353` |  | `// But as we have already decoded the data to find the signature algorithm,`
|  | `354` |  | `// we just verify the decoded data directly through the DigitalSignature.`
| 1198 | `355` |  | `return keyAlgorithm.DigitalSignature.Verify(exchangeHash, signatureData.Signature);`
|  | `356` |  | `}`
|  | `357` |  | ``
| 1 | `358` |  | `return false;`
| 1199 | `359` |  | `}`
|  | `360` |  | ``
|  | `361` |  | `/// <summary>`
|  | `362` |  | `/// Calculates key exchange hash value.`
|  | `363` |  | `/// </summary>`
|  | `364` |  | `/// <returns>Key exchange hash.</returns>`
|  | `365` |  | `protected abstract byte[] CalculateHash();`
|  | `366` |  | ``
|  | `367` |  | `/// <summary>`
|  | `368` |  | `/// Hashes the specified data bytes.`
|  | `369` |  | `/// </summary>`
|  | `370` |  | `/// <param name="hashData">The hash data.</param>`
|  | `371` |  | `/// <returns>`
|  | `372` |  | `/// The hash of the data.`
|  | `373` |  | `/// </returns>`
|  | `374` |  | `protected abstract byte[] Hash(byte[] hashData);`
|  | `375` |  | ``
|  | `376` |  | `/// <summary>`
|  | `377` |  | `/// Sends SSH message to the server.`
|  | `378` |  | `/// </summary>`
|  | `379` |  | `/// <param name="message">The message.</param>`
|  | `380` |  | `protected void SendMessage(Message message)`
| 3602 | `381` |  | `{`
| 3602 | `382` |  | `Session.SendMessage(message);`
| 3602 | `383` |  | `}`
|  | `384` |  | ``
|  | `385` |  | `/// <summary>`
|  | `386` |  | `/// Generates the session key.`
|  | `387` |  | `/// </summary>`
|  | `388` |  | `/// <param name="sharedKey">The shared key.</param>`
|  | `389` |  | `/// <param name="exchangeHash">The exchange hash.</param>`
|  | `390` |  | `/// <param name="key">The key.</param>`
|  | `391` |  | `/// <param name="size">The size.</param>`
|  | `392` |  | `/// <returns>`
|  | `393` |  | `/// The session key.`
|  | `394` |  | `/// </returns>`
|  | `395` |  | `private byte[] GenerateSessionKey(byte[] sharedKey, byte[] exchangeHash, byte[] key, int size)`
| 4792 | `396` |  | `{`
| 4792 | `397` |  | `var result = new List<byte>(key);`
|  | `398` |  | ``
| 4798 | `399` |  | `while (size > result.Count)`
| 6 | `400` |  | `{`
| 6 | `401` |  | `var sessionKeyAdjustment = new SessionKeyAdjustment`
| 6 | `402` |  | `{`
| 6 | `403` |  | `SharedKey = sharedKey,`
| 6 | `404` |  | `ExchangeHash = exchangeHash,`
| 6 | `405` |  | `Key = key,`
| 6 | `406` |  | `};`
|  | `407` |  | ``
| 6 | `408` |  | `result.AddRange(Hash(sessionKeyAdjustment.GetBytes()));`
| 6 | `409` |  | `}`
|  | `410` |  | ``
| 4792 | `411` |  | `return result.ToArray();`
| 4792 | `412` |  | `}`
|  | `413` |  | ``
|  | `414` |  | `/// <summary>`
|  | `415` |  | `/// Generates the session key.`
|  | `416` |  | `/// </summary>`
|  | `417` |  | `/// <param name="sharedKey">The shared key.</param>`
|  | `418` |  | `/// <param name="exchangeHash">The exchange hash.</param>`
|  | `419` |  | `/// <param name="p">The p.</param>`
|  | `420` |  | `/// <param name="sessionId">The session id.</param>`
|  | `421` |  | `/// <returns>`
|  | `422` |  | `/// The session key.`
|  | `423` |  | `/// </returns>`
|  | `424` |  | `private static byte[] GenerateSessionKey(byte[] sharedKey, byte[] exchangeHash, char p, byte[] sessionId)`
| 7188 | `425` |  | `{`
| 7188 | `426` |  | `var sessionKeyGeneration = new SessionKeyGeneration`
| 7188 | `427` |  | `{`
| 7188 | `428` |  | `SharedKey = sharedKey,`
| 7188 | `429` |  | `ExchangeHash = exchangeHash,`
| 7188 | `430` |  | `Char = p,`
| 7188 | `431` |  | `SessionId = sessionId`
| 7188 | `432` |  | `};`
| 7188 | `433` |  | `return sessionKeyGeneration.GetBytes();`
| 7188 | `434` |  | `}`
|  | `435` |  | ``
|  | `436` |  | `private sealed class SessionKeyGeneration : SshData`
|  | `437` |  | `{`
| 21564 | `438` |  | `public byte[] SharedKey { get; set; }`
|  | `439` |  | ``
| 21564 | `440` |  | `public byte[] ExchangeHash { get; set; }`
|  | `441` |  | ``
| 14376 | `442` |  | `public char Char { get; set; }`
|  | `443` |  | ``
| 21564 | `444` |  | `public byte[] SessionId { get; set; }`
|  | `445` |  | ``
|  | `446` |  | `/// <summary>`
|  | `447` |  | `/// Gets the size of the message in bytes.`
|  | `448` |  | `/// </summary>`
|  | `449` |  | `/// <value>`
|  | `450` |  | `/// The size of the messages in bytes.`
|  | `451` |  | `/// </value>`
|  | `452` |  | `protected override int BufferCapacity`
|  | `453` |  | `{`
|  | `454` |  | `get`
| 7188 | `455` |  | `{`
| 7188 | `456` |  | `var capacity = base.BufferCapacity;`
| 7188 | `457` |  | `capacity += 4; // SharedKey length`
| 7188 | `458` |  | `capacity += SharedKey.Length; // SharedKey`
| 7188 | `459` |  | `capacity += ExchangeHash.Length; // ExchangeHash`
| 7188 | `460` |  | `capacity += 1; // Char`
| 7188 | `461` |  | `capacity += SessionId.Length; // SessionId`
| 7188 | `462` |  | `return capacity;`
| 7188 | `463` |  | `}`
|  | `464` |  | `}`
|  | `465` |  | ``
|  | `466` |  | `protected override void LoadData()`
| 0 | `467` |  | `{`
| 0 | `468` |  | `throw new NotImplementedException();`
|  | `469` |  | `}`
|  | `470` |  | ``
|  | `471` |  | `protected override void SaveData()`
| 7188 | `472` |  | `{`
| 7188 | `473` |  | `WriteBinaryString(SharedKey);`
| 7188 | `474` |  | `Write(ExchangeHash);`
| 7188 | `475` |  | `Write((byte) Char);`
| 7188 | `476` |  | `Write(SessionId);`
| 7188 | `477` |  | `}`
|  | `478` |  | `}`
|  | `479` |  | ``
|  | `480` |  | `private sealed class SessionKeyAdjustment : SshData`
|  | `481` |  | `{`
| 18 | `482` |  | `public byte[] SharedKey { get; set; }`
|  | `483` |  | ``
| 18 | `484` |  | `public byte[] ExchangeHash { get; set; }`
|  | `485` |  | ``
| 18 | `486` |  | `public byte[] Key { get; set; }`
|  | `487` |  | ``
|  | `488` |  | `/// <summary>`
|  | `489` |  | `/// Gets the size of the message in bytes.`
|  | `490` |  | `/// </summary>`
|  | `491` |  | `/// <value>`
|  | `492` |  | `/// The size of the messages in bytes.`
|  | `493` |  | `/// </value>`
|  | `494` |  | `protected override int BufferCapacity`
|  | `495` |  | `{`
|  | `496` |  | `get`
| 6 | `497` |  | `{`
| 6 | `498` |  | `var capacity = base.BufferCapacity;`
| 6 | `499` |  | `capacity += 4; // SharedKey length`
| 6 | `500` |  | `capacity += SharedKey.Length; // SharedKey`
| 6 | `501` |  | `capacity += ExchangeHash.Length; // ExchangeHash`
| 6 | `502` |  | `capacity += Key.Length; // Key`
| 6 | `503` |  | `return capacity;`
| 6 | `504` |  | `}`
|  | `505` |  | `}`
|  | `506` |  | ``
|  | `507` |  | `protected override void LoadData()`
| 0 | `508` |  | `{`
| 0 | `509` |  | `throw new NotImplementedException();`
|  | `510` |  | `}`
|  | `511` |  | ``
|  | `512` |  | `protected override void SaveData()`
| 6 | `513` |  | `{`
| 6 | `514` |  | `WriteBinaryString(SharedKey);`
| 6 | `515` |  | `Write(ExchangeHash);`
| 6 | `516` |  | `Write(Key);`
| 6 | `517` |  | `}`
|  | `518` |  | `}`
|  | `519` |  | ``
|  | `520` |  | `#region IDisposable Members`
|  | `521` |  | ``
|  | `522` |  | `/// <summary>`
|  | `523` |  | `/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.`
|  | `524` |  | `/// </summary>`
|  | `525` |  | `public void Dispose()`
| 1199 | `526` |  | `{`
| 1199 | `527` |  | `Dispose(disposing: true);`
| 1199 | `528` |  | `GC.SuppressFinalize(this);`
| 1199 | `529` |  | `}`
|  | `530` |  | ``
|  | `531` |  | `/// <summary>`
|  | `532` |  | `/// Releases unmanaged and - optionally - managed resources.`
|  | `533` |  | `/// </summary>`
|  | `534` |  | `/// <param name="disposing"><see langword="true"/> to release both managed and unmanaged resources; <see langwor`
|  | `535` |  | `protected virtual void Dispose(bool disposing)`
| 1223 | `536` |  | `{`
| 1223 | `537` |  | `}`
|  | `538` |  | ``
|  | `539` |  | `/// <summary>`
|  | `540` |  | `/// Releases unmanaged resources and performs other cleanup operations before the`
|  | `541` |  | `/// <see cref="KeyExchange"/> is reclaimed by garbage collection.`
|  | `542` |  | `/// </summary>`
|  | `543` |  | `~KeyExchange()`
| 48 | `544` |  | `{`
| 24 | `545` |  | `Dispose(disposing: false);`
| 48 | `546` |  | `}`
|  | `547` |  | ``
|  | `548` |  | `#endregion`
|  | `549` |  | `}`
|  | `550` |  | `}`

# Methods/Properties

get_Session()
get_SharedKey()
get_ExchangeHash()
Start(Renci.SshNet.Session,Renci.SshNet.Messages.Transport.KeyExchangeInitMessage)
Finish()
CreateServerCipher()
CreateClientCipher()
CreateServerHash()
CreateClientHash()
CreateCompressor()
CreateDecompressor()
CanTrustHostKey(Renci.SshNet.Security.KeyHostAlgorithm)
ValidateExchangeHash(System.Byte[],System.Byte[])
SendMessage(Renci.SshNet.Messages.Message)
GenerateSessionKey(System.Byte[],System.Byte[],System.Byte[],System.Int32)
GenerateSessionKey(System.Byte[],System.Byte[],System.Char,System.Byte[])
get_SharedKey()
get_ExchangeHash()
get_Char()
get_SessionId()
get_BufferCapacity()
LoadData()
SaveData()
get_SharedKey()
get_ExchangeHash()
get_Key()
get_BufferCapacity()
LoadData()
SaveData()
Dispose()
Dispose(System.Boolean)
Finalize()