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Use BouncyCastle for Diffie-Hellman key exchange (#1654)

Browse Source 
Removes another vestige of hand-rolled crypto, and makes the classes public +
configurable for if/when we remove certain algorithms.
This commit is contained in:
Rob Hague
2025-08-02 11:08:56 +02:00
committed by GitHub
parent b7c5f1a87d
commit dab8a11738
25 changed files with 504 additions and 1017 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/Renci.SshNet/ConnectionInfo.cs
+9 -6
View File
@@ -7,6 +7,8 @@ using System.Text;
using Microsoft.Extensions.Logging;
using Org.BouncyCastle.Crypto.Agreement;
using Renci.SshNet.Common;
using Renci.SshNet.Compression;
using Renci.SshNet.Messages.Authentication;
@@ -357,12 +359,13 @@ namespace Renci.SshNet
{ "ecdh-sha2-nistp256", () => new KeyExchangeECDH256() },
{ "ecdh-sha2-nistp384", () => new KeyExchangeECDH384() },
{ "ecdh-sha2-nistp521", () => new KeyExchangeECDH521() },
{ "diffie-hellman-group-exchange-sha256", () => new KeyExchangeDiffieHellmanGroupExchangeSha256() },
{ "diffie-hellman-group-exchange-sha1", () => new KeyExchangeDiffieHellmanGroupExchangeSha1() },
{ "diffie-hellman-group16-sha512", () => new KeyExchangeDiffieHellmanGroup16Sha512() },
{ "diffie-hellman-group14-sha256", () => new KeyExchangeDiffieHellmanGroup14Sha256() },
{ "diffie-hellman-group14-sha1", () => new KeyExchangeDiffieHellmanGroup14Sha1() },
{ "diffie-hellman-group1-sha1", () => new KeyExchangeDiffieHellmanGroup1Sha1() },
{ "diffie-hellman-group-exchange-sha256", () => new KeyExchangeDiffieHellmanGroupExchange("diffie-hellman-group-exchange-sha256", HashAlgorithmName.SHA256) },
{ "diffie-hellman-group16-sha512", () => new KeyExchangeDiffieHellman("diffie-hellman-group16-sha512", DHStandardGroups.rfc3526_4096, HashAlgorithmName.SHA512) },
{ "diffie-hellman-group18-sha512", () => new KeyExchangeDiffieHellman("diffie-hellman-group18-sha512", DHStandardGroups.rfc3526_8192, HashAlgorithmName.SHA512) },
{ "diffie-hellman-group14-sha256", () => new KeyExchangeDiffieHellman("diffie-hellman-group14-sha256", DHStandardGroups.rfc3526_2048, HashAlgorithmName.SHA256) },
{ "diffie-hellman-group-exchange-sha1", () => new KeyExchangeDiffieHellmanGroupExchange("diffie-hellman-group-exchange-sha1", HashAlgorithmName.SHA1) },
{ "diffie-hellman-group14-sha1", () => new KeyExchangeDiffieHellman("diffie-hellman-group14-sha1", DHStandardGroups.rfc3526_2048, HashAlgorithmName.SHA1) },
{ "diffie-hellman-group1-sha1", () => new KeyExchangeDiffieHellman("diffie-hellman-group1-sha1", DHStandardGroups.rfc2409_1024, HashAlgorithmName.SHA1) },
};
Encryptions = new OrderedDictionary<string, CipherInfo>
src/Renci.SshNet/Messages/Transport/KeyExchangeDhGroupExchangeGroup.cs
+10 -10
View File
@@ -9,8 +9,8 @@ namespace Renci.SshNet.Messages.Transport
/// </summary>
public class KeyExchangeDhGroupExchangeGroup : Message
{
private byte[] _safePrime;
private byte[] _subGroup;
internal byte[] SafePrimeBytes { get; private set; }
internal byte[] SubGroupBytes { get; private set; }
/// <inheritdoc />
public override string MessageName
@@ -38,7 +38,7 @@ namespace Renci.SshNet.Messages.Transport
/// </value>
public BigInteger SafePrime
{
get { return _safePrime.ToBigInteger(); }
get { return SafePrimeBytes.ToBigInteger(); }
}
/// <summary>
@@ -49,7 +49,7 @@ namespace Renci.SshNet.Messages.Transport
/// </value>
public BigInteger SubGroup
{
get { return _subGroup.ToBigInteger(); }
get { return SubGroupBytes.ToBigInteger(); }
}
/// <summary>
@@ -64,9 +64,9 @@ namespace Renci.SshNet.Messages.Transport
{
var capacity = base.BufferCapacity;
capacity += 4; // SafePrime length
capacity += _safePrime.Length; // SafePrime
capacity += SafePrimeBytes.Length; // SafePrime
capacity += 4; // SubGroup length
capacity += _subGroup.Length; // SubGroup
capacity += SubGroupBytes.Length; // SubGroup
return capacity;
}
@@ -77,8 +77,8 @@ namespace Renci.SshNet.Messages.Transport
/// </summary>
protected override void LoadData()
{
_safePrime = ReadBinary();
_subGroup = ReadBinary();
SafePrimeBytes = ReadBinary();
SubGroupBytes = ReadBinary();
}
/// <summary>
@@ -86,8 +86,8 @@ namespace Renci.SshNet.Messages.Transport
/// </summary>
protected override void SaveData()
{
WriteBinaryString(_safePrime);
WriteBinaryString(_subGroup);
WriteBinaryString(SafePrimeBytes);
WriteBinaryString(SubGroupBytes);
}
internal override void Process(Session session)
src/Renci.SshNet/Security/GroupExchangeHashData.cs
+6 -17
View File
@@ -1,5 +1,4 @@
using System;
using System.Numerics;
using Renci.SshNet.Common;
@@ -9,8 +8,6 @@ namespace Renci.SshNet.Security
{
private byte[] _serverVersion;
private byte[] _clientVersion;
private byte[] _prime;
private byte[] _subGroup;
public string ServerVersion
{
@@ -36,17 +33,9 @@ namespace Renci.SshNet.Security
public uint MaximumGroupSize { get; set; }
public BigInteger Prime
{
private get { return _prime.ToBigInteger(); }
set { _prime = value.ToByteArray(isBigEndian: true); }
}
public byte[] Prime { get; set; }
public BigInteger SubGroup
{
private get { return _subGroup.ToBigInteger(); }
set { _subGroup = value.ToByteArray(isBigEndian: true); }
}
public byte[] SubGroup { get; set; }
public byte[] ClientExchangeValue { get; set; }
@@ -79,9 +68,9 @@ namespace Renci.SshNet.Security
capacity += 4; // PreferredGroupSize
capacity += 4; // MaximumGroupSize
capacity += 4; // Prime length
capacity += _prime.Length; // Prime
capacity += Prime.Length; // Prime
capacity += 4; // SubGroup length
capacity += _subGroup.Length; // SubGroup
capacity += SubGroup.Length; // SubGroup
capacity += 4; // ClientExchangeValue length
capacity += ClientExchangeValue.Length; // ClientExchangeValue
capacity += 4; // ServerExchangeValue length
@@ -107,8 +96,8 @@ namespace Renci.SshNet.Security
Write(MinimumGroupSize);
Write(PreferredGroupSize);
Write(MaximumGroupSize);
WriteBinaryString(_prime);
WriteBinaryString(_subGroup);
WriteBinaryString(Prime);
WriteBinaryString(SubGroup);
WriteBinaryString(ClientExchangeValue);
WriteBinaryString(ServerExchangeValue);
WriteBinaryString(SharedKey);
src/Renci.SshNet/Security/KeyExchange.cs
+1 -1
View File
@@ -482,7 +482,7 @@ namespace Renci.SshNet.Security
/// <summary>
/// Validates the exchange hash.
/// </summary>
/// <returns>true if exchange hash is valid; otherwise false.</returns>
/// <returns><see langword="true"/> if exchange hash is valid; otherwise <see langword="false"/>.</returns>
protected abstract bool ValidateExchangeHash();
private protected bool ValidateExchangeHash(byte[] encodedKey, byte[] encodedSignature)
src/Renci.SshNet/Security/KeyExchangeDiffieHellman.cs
+129 -113
View File
@@ -1,5 +1,10 @@
using System;
using System.Numerics;
#nullable enable
using System;
using System.Security.Cryptography;
using Org.BouncyCastle.Crypto.Agreement;
using Org.BouncyCastle.Crypto.Generators;
using Org.BouncyCastle.Crypto.Parameters;
using Renci.SshNet.Abstractions;
using Renci.SshNet.Common;
@@ -8,74 +13,65 @@ using Renci.SshNet.Messages.Transport;
namespace Renci.SshNet.Security
{
/// <summary>
/// Represents base class for Diffie Hellman key exchange algorithm.
/// Provides the implementation of "diffie-hellman-groupN" algorithms.
/// </summary>
internal abstract class KeyExchangeDiffieHellman : KeyExchange
public class KeyExchangeDiffieHellman : KeyExchange
{
#pragma warning disable SA1401 // Fields should be private
/// <summary>
/// Specifies key exchange group number.
/// </summary>
protected BigInteger _group;
private byte[]? _clientPayload;
private byte[]? _serverPayload;
private byte[]? _clientExchangeValue;
private byte[]? _serverExchangeValue;
private byte[]? _hostKey;
private byte[]? _signature;
/// <inheritdoc/>
public override string Name { get; }
private readonly DHParameters _dhParameters;
#if NET462
private readonly HashAlgorithm _hash;
#else
private readonly IncrementalHash _hash;
#endif
private DHBasicAgreement? _keyAgreement;
/// <summary>
/// Specifies key exchange prime number.
/// Initializes a new instance of the <see cref="KeyExchangeDiffieHellman"/> class.
/// </summary>
protected BigInteger _prime;
/// <summary>
/// Specifies client payload.
/// </summary>
protected byte[] _clientPayload;
/// <summary>
/// Specifies server payload.
/// </summary>
protected byte[] _serverPayload;
/// <summary>
/// Specifies client exchange number.
/// </summary>
protected byte[] _clientExchangeValue;
/// <summary>
/// Specifies server exchange number.
/// </summary>
protected byte[] _serverExchangeValue;
/// <summary>
/// Specifies random generated number.
/// </summary>
protected BigInteger _privateExponent;
/// <summary>
/// Specifies host key data.
/// </summary>
protected byte[] _hostKey;
/// <summary>
/// Specifies signature data.
/// </summary>
protected byte[] _signature;
#pragma warning restore SA1401 // Fields should be private
/// <summary>
/// Gets the size, in bits, of the computed hash code.
/// </summary>
/// <value>
/// The size, in bits, of the computed hash code.
/// </value>
protected abstract int HashSize { get; }
/// <summary>
/// Validates the exchange hash.
/// </summary>
/// <returns>
/// true if exchange hash is valid; otherwise false.
/// </returns>
protected override bool ValidateExchangeHash()
/// <param name="name">The name of the key exchange algorithm.</param>
/// <param name="parameters">The Diffie-Hellman parameters to be used.</param>
/// <param name="hashAlgorithm">The hash algorithm to be used.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="name"/>, <paramref name="parameters"/>, or <see cref="HashAlgorithmName.Name"/> is <see langword="null"/>.
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="hashAlgorithm"/> is not a valid hash algorithm.
/// </exception>
public KeyExchangeDiffieHellman(
string name,
DHParameters parameters,
HashAlgorithmName hashAlgorithm)
{
return ValidateExchangeHash(_hostKey, _signature);
ThrowHelper.ThrowIfNull(name);
ThrowHelper.ThrowIfNull(parameters);
ThrowHelper.ThrowIfNullOrEmpty(hashAlgorithm.Name, nameof(hashAlgorithm));
Name = name;
_dhParameters = parameters;
#if NET462
_hash = CryptoConfig.CreateFromName(hashAlgorithm.Name) as HashAlgorithm
?? throw new ArgumentException($"Could not create {nameof(HashAlgorithm)} from `{hashAlgorithm}`.", nameof(hashAlgorithm));
#else
try
{
_hash = IncrementalHash.CreateHash(hashAlgorithm);
}
catch (CryptographicException cex)
{
throw new ArgumentException($"Could not create {nameof(HashAlgorithm)} from `{hashAlgorithm}`.", nameof(hashAlgorithm), cex);
}
#endif
}
/// <inheritdoc/>
@@ -85,66 +81,86 @@ namespace Renci.SshNet.Security
_serverPayload = message.GetBytes();
_clientPayload = Session.ClientInitMessage.GetBytes();
var g = new DHKeyPairGenerator();
g.Init(new DHKeyGenerationParameters(CryptoAbstraction.SecureRandom, _dhParameters));
var aKeyPair = g.GenerateKeyPair();
_keyAgreement = new DHBasicAgreement();
_keyAgreement.Init(aKeyPair.Private);
_clientExchangeValue = ((DHPublicKeyParameters)aKeyPair.Public).Y.ToByteArray();
Session.RegisterMessage("SSH_MSG_KEXDH_REPLY");
Session.KeyExchangeDhReplyMessageReceived += Session_KeyExchangeDhReplyMessageReceived;
SendMessage(new KeyExchangeDhInitMessage(_clientExchangeValue));
}
/// <summary>
/// Populates the client exchange value.
/// </summary>
protected void PopulateClientExchangeValue()
/// <inheritdoc/>
protected override byte[] CalculateHash()
{
if (_group.IsZero)
var keyExchangeHashData = new KeyExchangeHashData
{
throw new ArgumentNullException("_group");
}
ClientVersion = Session.ClientVersion,
ServerVersion = Session.ServerVersion,
ClientPayload = _clientPayload,
ServerPayload = _serverPayload,
HostKey = _hostKey,
ClientExchangeValue = _clientExchangeValue,
ServerExchangeValue = _serverExchangeValue,
SharedKey = SharedKey,
};
if (_prime.IsZero)
{
throw new ArgumentNullException("_prime");
}
// generate private exponent that is twice the hash size (RFC 4419) with a minimum
// of 1024 bits (whatever is less)
var privateExponentSize = Math.Max(HashSize * 2, 1024);
BigInteger clientExchangeValue;
do
{
// Create private component
_privateExponent = RandomBigInt(privateExponentSize);
// Generate public component
clientExchangeValue = BigInteger.ModPow(_group, _privateExponent, _prime);
}
while (clientExchangeValue < 1 || clientExchangeValue > (_prime - 1));
_clientExchangeValue = clientExchangeValue.ToByteArray(isBigEndian: true);
return Hash(keyExchangeHashData.GetBytes());
}
/// <summary>
/// Generates a new, random <see cref="BigInteger"/> of the specified length.
/// </summary>
/// <param name="bitLength">The number of bits for the new number.</param>
/// <returns>A random number of the specified length.</returns>
private static BigInteger RandomBigInt(int bitLength)
private void Session_KeyExchangeDhReplyMessageReceived(object? sender, MessageEventArgs<KeyExchangeDhReplyMessage> e)
{
var bytesArray = CryptoAbstraction.GenerateRandom((bitLength / 8) + (((bitLength % 8) > 0) ? 1 : 0));
bytesArray[bytesArray.Length - 1] = (byte)(bytesArray[bytesArray.Length - 1] & 0x7F); // Ensure not a negative value
return new BigInteger(bytesArray);
var message = e.Message;
Session.KeyExchangeDhReplyMessageReceived -= Session_KeyExchangeDhReplyMessageReceived;
Session.UnRegisterMessage("SSH_MSG_KEXDH_REPLY");
_serverExchangeValue = message.F;
_hostKey = message.HostKey;
_signature = message.Signature;
var publicKey = new DHPublicKeyParameters(new Org.BouncyCastle.Math.BigInteger(message.F), _dhParameters);
SharedKey = _keyAgreement!.CalculateAgreement(publicKey).ToByteArray();
Finish();
}
/// <summary>
/// Handles the server DH reply message.
/// </summary>
/// <param name="hostKey">The host key.</param>
/// <param name="serverExchangeValue">The server exchange value.</param>
/// <param name="signature">The signature.</param>
protected virtual void HandleServerDhReply(byte[] hostKey, byte[] serverExchangeValue, byte[] signature)
/// <inheritdoc/>
protected override bool ValidateExchangeHash()
{
_serverExchangeValue = serverExchangeValue;
_hostKey = hostKey;
SharedKey = BigInteger.ModPow(serverExchangeValue.ToBigInteger(), _privateExponent, _prime).ToByteArray(isBigEndian: true);
_signature = signature;
return ValidateExchangeHash(_hostKey, _signature);
}
/// <inheritdoc/>
protected override byte[] Hash(byte[] hashData)
{
#if NET462
return _hash.ComputeHash(hashData);
#else
_hash.AppendData(hashData);
return _hash.GetHashAndReset();
#endif
}
/// <inheritdoc/>
protected override void Dispose(bool disposing)
{
if (disposing)
{
_hash.Dispose();
}
base.Dispose(disposing);
}
}
}
src/Renci.SshNet/Security/KeyExchangeDiffieHellmanGroup14Sha1.cs
-62
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@@ -1,62 +0,0 @@
using System.Numerics;
namespace Renci.SshNet.Security
{
/// <summary>
/// Represents "diffie-hellman-group14-sha1" algorithm implementation.
/// </summary>
internal sealed class KeyExchangeDiffieHellmanGroup14Sha1 : KeyExchangeDiffieHellmanGroupSha1
{
/// <summary>
/// Defined in https://tools.ietf.org/html/rfc2409#section-6.2.
/// </summary>
private static readonly BigInteger SecondOkleyGroupReversed = new BigInteger(
[
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x68, 0xaa, 0xac, 0x8a,
0x5a, 0x8e, 0x72, 0x15, 0x10, 0x05, 0xfa, 0x98, 0x18, 0x26, 0xd2, 0x15,
0xe5, 0x6a, 0x95, 0xea, 0x7c, 0x49, 0x95, 0x39, 0x18, 0x17, 0x58, 0x95,
0xf6, 0xcb, 0x2b, 0xde, 0xc9, 0x52, 0x4c, 0x6f, 0xf0, 0x5d, 0xc5, 0xb5,
0x8f, 0xa2, 0x07, 0xec, 0xa2, 0x83, 0x27, 0x9b, 0x03, 0x86, 0x0e, 0x18,
0x2c, 0x77, 0x9e, 0xe3, 0x3b, 0xce, 0x36, 0x2e, 0x46, 0x5e, 0x90, 0x32,
0x7c, 0x21, 0x18, 0xca, 0x08, 0x6c, 0x74, 0xf1, 0x04, 0x98, 0xbc, 0x4a,
0x4e, 0x35, 0x0c, 0x67, 0x6d, 0x96, 0x96, 0x70, 0x07, 0x29, 0xd5, 0x9e,
0xbb, 0x52, 0x85, 0x20, 0x56, 0xf3, 0x62, 0x1c, 0x96, 0xad, 0xa3, 0xdc,
0x23, 0x5d, 0x65, 0x83, 0x5f, 0xcf, 0x24, 0xfd, 0xa8, 0x3f, 0x16, 0x69,
0x9a, 0xd3, 0x55, 0x1c, 0x36, 0x48, 0xda, 0x98, 0x05, 0xbf, 0x63, 0xa1,
0xb8, 0x7c, 0x00, 0xc2, 0x3d, 0x5b, 0xe4, 0xec, 0x51, 0x66, 0x28, 0x49,
0xe6, 0x1f, 0x4b, 0x7c, 0x11, 0x24, 0x9f, 0xae, 0xa5, 0x9f, 0x89, 0x5a,
0xfb, 0x6b, 0x38, 0xee, 0xed, 0xb7, 0x06, 0xf4, 0xb6, 0x5c, 0xff, 0x0b,
0x6b, 0xed, 0x37, 0xa6, 0xe9, 0x42, 0x4c, 0xf4, 0xc6, 0x7e, 0x5e, 0x62,
0x76, 0xb5, 0x85, 0xe4, 0x45, 0xc2, 0x51, 0x6d, 0x6d, 0x35, 0xe1, 0x4f,
0x37, 0x14, 0x5f, 0xf2, 0x6d, 0x0a, 0x2b, 0x30, 0x1b, 0x43, 0x3a, 0xcd,
0xb3, 0x19, 0x95, 0xef, 0xdd, 0x04, 0x34, 0x8e, 0x79, 0x08, 0x4a, 0x51,
0x22, 0x9b, 0x13, 0x3b, 0xa6, 0xbe, 0x0b, 0x02, 0x74, 0xcc, 0x67, 0x8a,
0x08, 0x4e, 0x02, 0x29, 0xd1, 0x1c, 0xdc, 0x80, 0x8b, 0x62, 0xc6, 0xc4,
0x34, 0xc2, 0x68, 0x21, 0xa2, 0xda, 0x0f, 0xc9, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0x00
]);
/// <summary>
/// Gets algorithm name.
/// </summary>
public override string Name
{
get { return "diffie-hellman-group14-sha1"; }
}
/// <summary>
/// Gets the group prime.
/// </summary>
/// <value>
/// The group prime.
/// </value>
public override BigInteger GroupPrime
{
get
{
return SecondOkleyGroupReversed;
}
}
}
}
src/Renci.SshNet/Security/KeyExchangeDiffieHellmanGroup14Sha256.cs
-62
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@@ -1,62 +0,0 @@
using System.Numerics;
namespace Renci.SshNet.Security
{
/// <summary>
/// Represents "diffie-hellman-group14-sha256" algorithm implementation.
/// </summary>
internal sealed class KeyExchangeDiffieHellmanGroup14Sha256 : KeyExchangeDiffieHellmanGroupSha256
{
/// <summary>
/// Defined in https://tools.ietf.org/html/rfc2409#section-6.2.
/// </summary>
private static readonly BigInteger SecondOkleyGroupReversed = new BigInteger(
[
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x68, 0xaa, 0xac, 0x8a,
0x5a, 0x8e, 0x72, 0x15, 0x10, 0x05, 0xfa, 0x98, 0x18, 0x26, 0xd2, 0x15,
0xe5, 0x6a, 0x95, 0xea, 0x7c, 0x49, 0x95, 0x39, 0x18, 0x17, 0x58, 0x95,
0xf6, 0xcb, 0x2b, 0xde, 0xc9, 0x52, 0x4c, 0x6f, 0xf0, 0x5d, 0xc5, 0xb5,
0x8f, 0xa2, 0x07, 0xec, 0xa2, 0x83, 0x27, 0x9b, 0x03, 0x86, 0x0e, 0x18,
0x2c, 0x77, 0x9e, 0xe3, 0x3b, 0xce, 0x36, 0x2e, 0x46, 0x5e, 0x90, 0x32,
0x7c, 0x21, 0x18, 0xca, 0x08, 0x6c, 0x74, 0xf1, 0x04, 0x98, 0xbc, 0x4a,
0x4e, 0x35, 0x0c, 0x67, 0x6d, 0x96, 0x96, 0x70, 0x07, 0x29, 0xd5, 0x9e,
0xbb, 0x52, 0x85, 0x20, 0x56, 0xf3, 0x62, 0x1c, 0x96, 0xad, 0xa3, 0xdc,
0x23, 0x5d, 0x65, 0x83, 0x5f, 0xcf, 0x24, 0xfd, 0xa8, 0x3f, 0x16, 0x69,
0x9a, 0xd3, 0x55, 0x1c, 0x36, 0x48, 0xda, 0x98, 0x05, 0xbf, 0x63, 0xa1,
0xb8, 0x7c, 0x00, 0xc2, 0x3d, 0x5b, 0xe4, 0xec, 0x51, 0x66, 0x28, 0x49,
0xe6, 0x1f, 0x4b, 0x7c, 0x11, 0x24, 0x9f, 0xae, 0xa5, 0x9f, 0x89, 0x5a,
0xfb, 0x6b, 0x38, 0xee, 0xed, 0xb7, 0x06, 0xf4, 0xb6, 0x5c, 0xff, 0x0b,
0x6b, 0xed, 0x37, 0xa6, 0xe9, 0x42, 0x4c, 0xf4, 0xc6, 0x7e, 0x5e, 0x62,
0x76, 0xb5, 0x85, 0xe4, 0x45, 0xc2, 0x51, 0x6d, 0x6d, 0x35, 0xe1, 0x4f,
0x37, 0x14, 0x5f, 0xf2, 0x6d, 0x0a, 0x2b, 0x30, 0x1b, 0x43, 0x3a, 0xcd,
0xb3, 0x19, 0x95, 0xef, 0xdd, 0x04, 0x34, 0x8e, 0x79, 0x08, 0x4a, 0x51,
0x22, 0x9b, 0x13, 0x3b, 0xa6, 0xbe, 0x0b, 0x02, 0x74, 0xcc, 0x67, 0x8a,
0x08, 0x4e, 0x02, 0x29, 0xd1, 0x1c, 0xdc, 0x80, 0x8b, 0x62, 0xc6, 0xc4,
0x34, 0xc2, 0x68, 0x21, 0xa2, 0xda, 0x0f, 0xc9, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0x00
]);
/// <summary>
/// Gets algorithm name.
/// </summary>
public override string Name
{
get { return "diffie-hellman-group14-sha256"; }
}
/// <summary>
/// Gets the group prime.
/// </summary>
/// <value>
/// The group prime.
/// </value>
public override BigInteger GroupPrime
{
get
{
return SecondOkleyGroupReversed;
}
}
}
}
src/Renci.SshNet/Security/KeyExchangeDiffieHellmanGroup16Sha512.cs
-66
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@@ -1,66 +0,0 @@
using System.Numerics;
namespace Renci.SshNet.Security
{
/// <summary>
/// Represents "diffie-hellman-group16-sha512" algorithm implementation.
/// </summary>
internal sealed class KeyExchangeDiffieHellmanGroup16Sha512 : KeyExchangeDiffieHellmanGroupSha512
{
/// <summary>
/// Defined in https://tools.ietf.org/html/rfc3526#section-5.
/// </summary>
private static readonly BigInteger MoreModularExponentialGroup16Reversed = new BigInteger(
[
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x99, 0x31, 0x06, 0x34, 0xc9, 0x35, 0xf4, 0x4d,
0x8f, 0xc0, 0xa6, 0x90, 0xdc, 0xb7, 0xff, 0x86, 0xc1, 0xdd, 0x8f, 0x8d, 0x98, 0xea, 0xb4, 0x93,
0xa9, 0x5a, 0xb0, 0xd5, 0x27, 0x91, 0x06, 0xd0, 0x1c, 0x48, 0x70, 0x21, 0x76, 0xdd, 0x1b, 0xb8,
0xaf, 0xd7, 0xe2, 0xce, 0x70, 0x29, 0x61, 0x1f, 0xed, 0xe7, 0x5b, 0x51, 0x86, 0xa1, 0x3b, 0x23,
0xa2, 0xc3, 0x90, 0xa0, 0x4f, 0x96, 0xb2, 0x99, 0x5d, 0xc0, 0x6b, 0x4e, 0x47, 0x59, 0x7c, 0x28,
0xa6, 0xca, 0xbe, 0x1f, 0x14, 0xfc, 0x8e, 0x2e, 0xf9, 0x8e, 0xde, 0x04, 0xdb, 0xc2, 0xbb, 0xdb,
0xe8, 0x4c, 0xd4, 0x2a, 0xca, 0xe9, 0x83, 0x25, 0xda, 0x0b, 0x15, 0xb6, 0x34, 0x68, 0x94, 0x1a,
0x3c, 0xe2, 0xf4, 0x6a, 0x18, 0x27, 0xc3, 0x99, 0x26, 0x5b, 0xba, 0xbd, 0x10, 0x9a, 0x71, 0x88,
0xd7, 0xe6, 0x87, 0xa7, 0x12, 0x3c, 0x72, 0x1a, 0x01, 0x08, 0x21, 0xa9, 0x20, 0xd1, 0x82, 0x4b,
0x8e, 0x10, 0xfd, 0xe0, 0xfc, 0x5b, 0xdb, 0x43, 0x31, 0xab, 0xe5, 0x74, 0xa0, 0x4f, 0xe2, 0x08,
0xe2, 0x46, 0xd9, 0xba, 0xc0, 0x88, 0x09, 0x77, 0x6c, 0x5d, 0x61, 0x7a, 0x57, 0x17, 0xe1, 0xbb,
0x0c, 0x20, 0x7b, 0x17, 0x18, 0x2b, 0x1f, 0x52, 0x64, 0x6a, 0xc8, 0x3e, 0x73, 0x02, 0x76, 0xd8,
0x64, 0x08, 0x8a, 0xd9, 0x06, 0xfa, 0x2f, 0xf1, 0x6b, 0xee, 0xd2, 0x1a, 0x26, 0xd2, 0xe3, 0xce,
0x9d, 0x61, 0x25, 0x4a, 0xe0, 0x94, 0x8c, 0x1e, 0xd7, 0x33, 0x09, 0xdb, 0x8c, 0xae, 0xf5, 0xab,
0xc7, 0xe4, 0xe1, 0xa6, 0x85, 0x0f, 0x97, 0xb3, 0x7d, 0x0c, 0x06, 0x5d, 0x57, 0x71, 0xea, 0x8a,
0x0a, 0xef, 0xdb, 0x58, 0x04, 0x85, 0xfb, 0xec, 0x64, 0xba, 0x1c, 0xdf, 0xab, 0x21, 0x55, 0xa8,
0x33, 0x7a, 0x50, 0x04, 0x0d, 0x17, 0x33, 0xad, 0x2d, 0xc4, 0xaa, 0x8a, 0x5a, 0x8e, 0x72, 0x15,
0x10, 0x05, 0xfa, 0x98, 0x18, 0x26, 0xd2, 0x15, 0xe5, 0x6a, 0x95, 0xea, 0x7c, 0x49, 0x95, 0x39,
0x18, 0x17, 0x58, 0x95, 0xf6, 0xcb, 0x2b, 0xde, 0xc9, 0x52, 0x4c, 0x6f, 0xf0, 0x5d, 0xc5, 0xb5,
0x8f, 0xa2, 0x07, 0xec, 0xa2, 0x83, 0x27, 0x9b, 0x03, 0x86, 0x0e, 0x18, 0x2c, 0x77, 0x9e, 0xe3,
0x3b, 0xce, 0x36, 0x2e, 0x46, 0x5e, 0x90, 0x32, 0x7c, 0x21, 0x18, 0xca, 0x08, 0x6c, 0x74, 0xf1,
0x04, 0x98, 0xbc, 0x4a, 0x4e, 0x35, 0x0c, 0x67, 0x6d, 0x96, 0x96, 0x70, 0x07, 0x29, 0xd5, 0x9e,
0xbb, 0x52, 0x85, 0x20, 0x56, 0xf3, 0x62, 0x1c, 0x96, 0xad, 0xa3, 0xdc, 0x23, 0x5d, 0x65, 0x83,
0x5f, 0xcf, 0x24, 0xfd, 0xa8, 0x3f, 0x16, 0x69, 0x9a, 0xd3, 0x55, 0x1c, 0x36, 0x48, 0xda, 0x98,
0x05, 0xbf, 0x63, 0xa1, 0xb8, 0x7c, 0x00, 0xc2, 0x3d, 0x5b, 0xe4, 0xec, 0x51, 0x66, 0x28, 0x49,
0xe6, 0x1f, 0x4b, 0x7c, 0x11, 0x24, 0x9f, 0xae, 0xa5, 0x9f, 0x89, 0x5a, 0xfb, 0x6b, 0x38, 0xee,
0xed, 0xb7, 0x06, 0xf4, 0xb6, 0x5c, 0xff, 0x0b, 0x6b, 0xed, 0x37, 0xa6, 0xe9, 0x42, 0x4c, 0xf4,
0xc6, 0x7e, 0x5e, 0x62, 0x76, 0xb5, 0x85, 0xe4, 0x45, 0xc2, 0x51, 0x6d, 0x6d, 0x35, 0xe1, 0x4f,
0x37, 0x14, 0x5f, 0xf2, 0x6d, 0x0a, 0x2b, 0x30, 0x1b, 0x43, 0x3a, 0xcd, 0xb3, 0x19, 0x95, 0xef,
0xdd, 0x04, 0x34, 0x8e, 0x79, 0x08, 0x4a, 0x51, 0x22, 0x9b, 0x13, 0x3b, 0xa6, 0xbe, 0x0b, 0x02,
0x74, 0xcc, 0x67, 0x8a, 0x08, 0x4e, 0x02, 0x29, 0xd1, 0x1c, 0xdc, 0x80, 0x8b, 0x62, 0xc6, 0xc4,
0x34, 0xc2, 0x68, 0x21, 0xa2, 0xda, 0x0f, 0xc9, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0x00
]);
public override BigInteger GroupPrime
{
get
{
return MoreModularExponentialGroup16Reversed;
}
}
/// <summary>
/// Gets algorithm name.
/// </summary>
public override string Name
{
get { return "diffie-hellman-group16-sha512"; }
}
}
}
src/Renci.SshNet/Security/KeyExchangeDiffieHellmanGroup1Sha1.cs
-48
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@@ -1,48 +0,0 @@
using System.Numerics;
namespace Renci.SshNet.Security
{
/// <summary>
/// Represents "diffie-hellman-group1-sha1" algorithm implementation.
/// </summary>
internal sealed class KeyExchangeDiffieHellmanGroup1Sha1 : KeyExchangeDiffieHellmanGroupSha1
{
private static readonly BigInteger SecondOkleyGroupReversed = new BigInteger(
[
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x81, 0x53, 0xe6, 0xec,
0x51, 0x66, 0x28, 0x49, 0xe6, 0x1f, 0x4b, 0x7c, 0x11, 0x24, 0x9f, 0xae,
0xa5, 0x9f, 0x89, 0x5a, 0xfb, 0x6b, 0x38, 0xee, 0xed, 0xb7, 0x06, 0xf4,
0xb6, 0x5c, 0xff, 0x0b, 0x6b, 0xed, 0x37, 0xa6, 0xe9, 0x42, 0x4c, 0xf4,
0xc6, 0x7e, 0x5e, 0x62, 0x76, 0xb5, 0x85, 0xe4, 0x45, 0xc2, 0x51, 0x6d,
0x6d, 0x35, 0xe1, 0x4f, 0x37, 0x14, 0x5f, 0xf2, 0x6d, 0x0a, 0x2b, 0x30,
0x1b, 0x43, 0x3a, 0xcd, 0xb3, 0x19, 0x95, 0xef, 0xdd, 0x04, 0x34, 0x8e,
0x79, 0x08, 0x4a, 0x51, 0x22, 0x9b, 0x13, 0x3b, 0xa6, 0xbe, 0x0b, 0x02,
0x74, 0xcc, 0x67, 0x8a, 0x08, 0x4e, 0x02, 0x29, 0xd1, 0x1c, 0xdc, 0x80,
0x8b, 0x62, 0xc6, 0xc4, 0x34, 0xc2, 0x68, 0x21, 0xa2, 0xda, 0x0f, 0xc9,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0x00
]);
/// <summary>
/// Gets algorithm name.
/// </summary>
public override string Name
{
get { return "diffie-hellman-group1-sha1"; }
}
/// <summary>
/// Gets the group prime.
/// </summary>
/// <value>
/// The group prime.
/// </value>
public override BigInteger GroupPrime
{
get
{
return SecondOkleyGroupReversed;
}
}
}
}
src/Renci.SshNet/Security/KeyExchangeDiffieHellmanGroupExchange.cs
+244
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@@ -0,0 +1,244 @@
#nullable enable
using System;
using System.Security.Cryptography;
using Org.BouncyCastle.Crypto.Agreement;
using Org.BouncyCastle.Crypto.Generators;
using Org.BouncyCastle.Crypto.Parameters;
using Renci.SshNet.Abstractions;
using Renci.SshNet.Common;
using Renci.SshNet.Messages.Transport;
namespace Renci.SshNet.Security
{
/// <summary>
/// Provides the implementation of "diffie-hellman-group-exchange" algorithms.
/// </summary>
public class KeyExchangeDiffieHellmanGroupExchange : KeyExchange
{
private byte[]? _clientPayload;
private byte[]? _serverPayload;
private byte[]? _clientExchangeValue;
private byte[]? _serverExchangeValue;
private byte[]? _prime;
private byte[]? _group;
private byte[]? _hostKey;
private byte[]? _signature;
/// <inheritdoc/>
public override string Name { get; }
#if NET
private readonly IncrementalHash _hash;
#else
private readonly HashAlgorithm _hash;
#endif
private readonly int _hashLengthInBits;
private readonly uint _minimumGroupSize;
private readonly uint _preferredGroupSize;
private readonly uint _maximumGroupSize;
private DHParameters? _dhParameters;
private DHBasicAgreement? _keyAgreement;
/// <summary>
/// Initializes a new instance of the <see cref="KeyExchangeDiffieHellmanGroupExchange"/> class.
/// </summary>
/// <param name="name">The name of the key exchange algorithm.</param>
/// <param name="hashAlgorithm">The hash algorithm to be used.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="name"/> or <see cref="HashAlgorithmName.Name"/> is <see langword="null"/>.
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="hashAlgorithm"/> is not a valid hash algorithm.
/// </exception>
public KeyExchangeDiffieHellmanGroupExchange(
string name,
HashAlgorithmName hashAlgorithm)
: this(name, hashAlgorithm, 2048, 4096, 8192)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="KeyExchangeDiffieHellmanGroupExchange"/> class.
/// </summary>
/// <param name="name">The name of the key exchange algorithm.</param>
/// <param name="hashAlgorithm">The hash algorithm to be used.</param>
/// <param name="minimumGroupSize">The minimum size in bits of an acceptable group.</param>
/// <param name="preferredGroupSize">The preferred size in bits of an acceptable group.</param>
/// <param name="maximumGroupSize">The maximum size in bits of an acceptable group.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="name"/> or <see cref="HashAlgorithmName.Name"/> is <see langword="null"/>.
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="hashAlgorithm"/> is not a valid hash algorithm.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="preferredGroupSize"/> is not between <paramref name="minimumGroupSize"/> and <paramref name="maximumGroupSize"/>.
/// </exception>
public KeyExchangeDiffieHellmanGroupExchange(
string name,
HashAlgorithmName hashAlgorithm,
uint minimumGroupSize,
uint preferredGroupSize,
uint maximumGroupSize)
{
ThrowHelper.ThrowIfNull(name);
ThrowHelper.ThrowIfNullOrEmpty(hashAlgorithm.Name, nameof(hashAlgorithm));
if (preferredGroupSize < minimumGroupSize || preferredGroupSize > maximumGroupSize)
{
throw new ArgumentOutOfRangeException(nameof(preferredGroupSize));
}
Name = name;
_minimumGroupSize = minimumGroupSize;
_preferredGroupSize = preferredGroupSize;
_maximumGroupSize = maximumGroupSize;
#if NET
try
{
_hash = IncrementalHash.CreateHash(hashAlgorithm);
_hashLengthInBits = _hash.HashLengthInBytes * 8;
}
catch (CryptographicException cex)
{
throw new ArgumentException($"Could not create {nameof(HashAlgorithm)} from `{hashAlgorithm}`.", nameof(hashAlgorithm), cex);
}
#else
_hash = CryptoConfig.CreateFromName(hashAlgorithm.Name) as HashAlgorithm
?? throw new ArgumentException($"Could not create {nameof(HashAlgorithm)} from `{hashAlgorithm}`.", nameof(hashAlgorithm));
_hashLengthInBits = _hash.HashSize;
#endif
}
/// <inheritdoc/>
protected override byte[] CalculateHash()
{
var groupExchangeHashData = new GroupExchangeHashData
{
ClientVersion = Session.ClientVersion,
ServerVersion = Session.ServerVersion,
ClientPayload = _clientPayload,
ServerPayload = _serverPayload,
HostKey = _hostKey,
MinimumGroupSize = _minimumGroupSize,
PreferredGroupSize = _preferredGroupSize,
MaximumGroupSize = _maximumGroupSize,
Prime = _prime,
SubGroup = _group,
ClientExchangeValue = _clientExchangeValue,
ServerExchangeValue = _serverExchangeValue,
SharedKey = SharedKey,
};
return Hash(groupExchangeHashData.GetBytes());
}
/// <inheritdoc/>
public override void Start(Session session, KeyExchangeInitMessage message, bool sendClientInitMessage)
{
base.Start(session, message, sendClientInitMessage);
_serverPayload = message.GetBytes();
_clientPayload = Session.ClientInitMessage.GetBytes();
Session.RegisterMessage("SSH_MSG_KEX_DH_GEX_GROUP");
Session.KeyExchangeDhGroupExchangeGroupReceived += Session_KeyExchangeDhGroupExchangeGroupReceived;
// 1. client sends SSH_MSG_KEY_DH_GEX_REQUEST
SendMessage(new KeyExchangeDhGroupExchangeRequest(_minimumGroupSize, _preferredGroupSize, _maximumGroupSize));
}
private void Session_KeyExchangeDhGroupExchangeGroupReceived(object? sender, MessageEventArgs<KeyExchangeDhGroupExchangeGroup> e)
{
// 2. server sends SSH_MSG_KEX_DH_GEX_GROUP
var groupMessage = e.Message;
Session.UnRegisterMessage("SSH_MSG_KEX_DH_GEX_GROUP");
Session.KeyExchangeDhGroupExchangeGroupReceived -= Session_KeyExchangeDhGroupExchangeGroupReceived;
_prime = groupMessage.SafePrimeBytes;
_group = groupMessage.SubGroupBytes;
// https://datatracker.ietf.org/doc/html/rfc4419#section-6.2
var minimumBitLength = 2 * _hashLengthInBits;
_dhParameters = new DHParameters(
new Org.BouncyCastle.Math.BigInteger(_prime),
new Org.BouncyCastle.Math.BigInteger(_group),
q: null,
m: minimumBitLength,
l: 0);
var g = new DHKeyPairGenerator();
g.Init(new DHKeyGenerationParameters(CryptoAbstraction.SecureRandom, _dhParameters));
var aKeyPair = g.GenerateKeyPair();
_keyAgreement = new DHBasicAgreement();
_keyAgreement.Init(aKeyPair.Private);
_clientExchangeValue = ((DHPublicKeyParameters)aKeyPair.Public).Y.ToByteArray();
Session.RegisterMessage("SSH_MSG_KEX_DH_GEX_REPLY");
Session.KeyExchangeDhGroupExchangeReplyReceived += Session_KeyExchangeDhGroupExchangeReplyReceived;
// 3. client sends SSH_MSG_KEX_DH_GEX_INIT
SendMessage(new KeyExchangeDhGroupExchangeInit(_clientExchangeValue));
}
private void Session_KeyExchangeDhGroupExchangeReplyReceived(object? sender, MessageEventArgs<KeyExchangeDhGroupExchangeReply> e)
{
// 4. server sends SSH_MSG_KEX_DH_GEX_REPLY
var message = e.Message;
Session.KeyExchangeDhGroupExchangeReplyReceived -= Session_KeyExchangeDhGroupExchangeReplyReceived;
Session.UnRegisterMessage("SSH_MSG_KEX_DH_GEX_REPLY");
Session.KeyExchangeDhGroupExchangeReplyReceived -= Session_KeyExchangeDhGroupExchangeReplyReceived;
_serverExchangeValue = message.F;
_hostKey = message.HostKey;
_signature = message.Signature;
var publicKey = new DHPublicKeyParameters(new Org.BouncyCastle.Math.BigInteger(message.F), _dhParameters);
SharedKey = _keyAgreement!.CalculateAgreement(publicKey).ToByteArray();
// When SSH_MSG_KEX_DH_GEX_REPLY received key exchange is completed
Finish();
}
/// <inheritdoc/>
protected override bool ValidateExchangeHash()
{
return ValidateExchangeHash(_hostKey, _signature);
}
/// <inheritdoc/>
protected override byte[] Hash(byte[] hashData)
{
#if NET
_hash.AppendData(hashData);
return _hash.GetHashAndReset();
#else
return _hash.ComputeHash(hashData);
#endif
}
/// <inheritdoc/>
protected override void Dispose(bool disposing)
{
if (disposing)
{
_hash.Dispose();
}
base.Dispose(disposing);
}
}
}
src/Renci.SshNet/Security/KeyExchangeDiffieHellmanGroupExchangeSha1.cs
-41
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@@ -1,41 +0,0 @@
using Renci.SshNet.Abstractions;
namespace Renci.SshNet.Security
{
/// <summary>
/// Represents "diffie-hellman-group-exchange-sha1" algorithm implementation.
/// </summary>
internal sealed class KeyExchangeDiffieHellmanGroupExchangeSha1 : KeyExchangeDiffieHellmanGroupExchangeShaBase
{
/// <summary>
/// Gets algorithm name.
/// </summary>
public override string Name
{
get { return "diffie-hellman-group-exchange-sha1"; }
}
/// <summary>
/// Gets the size, in bits, of the computed hash code.
/// </summary>
/// <value>
/// The size, in bits, of the computed hash code.
/// </value>
protected override int HashSize
{
get { return 160; }
}
/// <summary>
/// Hashes the specified data bytes.
/// </summary>
/// <param name="hashData">The hash data.</param>
/// <returns>
/// The hash of the data.
/// </returns>
protected override byte[] Hash(byte[] hashData)
{
return CryptoAbstraction.HashSHA1(hashData);
}
}
}
src/Renci.SshNet/Security/KeyExchangeDiffieHellmanGroupExchangeSha256.cs
-41
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@@ -1,41 +0,0 @@
using Renci.SshNet.Abstractions;
namespace Renci.SshNet.Security
{
/// <summary>
/// Represents "diffie-hellman-group-exchange-sha256" algorithm implementation.
/// </summary>
internal sealed class KeyExchangeDiffieHellmanGroupExchangeSha256 : KeyExchangeDiffieHellmanGroupExchangeShaBase
{
/// <summary>
/// Gets algorithm name.
/// </summary>
public override string Name
{
get { return "diffie-hellman-group-exchange-sha256"; }
}
/// <summary>
/// Gets the size, in bits, of the computed hash code.
/// </summary>
/// <value>
/// The size, in bits, of the computed hash code.
/// </value>
protected override int HashSize
{
get { return 256; }
}
/// <summary>
/// Hashes the specified data bytes.
/// </summary>
/// <param name="hashData">Data to hash.</param>
/// <returns>
/// The hash of the data.
/// </returns>
protected override byte[] Hash(byte[] hashData)
{
return CryptoAbstraction.HashSHA256(hashData);
}
}
}
src/Renci.SshNet/Security/KeyExchangeDiffieHellmanGroupExchangeShaBase.cs
-111
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@@ -1,111 +0,0 @@
using Renci.SshNet.Messages.Transport;
namespace Renci.SshNet.Security
{
/// <summary>
/// Base class for "diffie-hellman-group-exchange" algorithms.
/// </summary>
internal abstract class KeyExchangeDiffieHellmanGroupExchangeShaBase : KeyExchangeDiffieHellman
{
private const int MinimumGroupSize = 1024;
private const int PreferredGroupSize = 1024;
private const int MaximumProupSize = 8192;
/// <summary>
/// Calculates key exchange hash value.
/// </summary>
/// <returns>
/// Key exchange hash.
/// </returns>
protected override byte[] CalculateHash()
{
var groupExchangeHashData = new GroupExchangeHashData
{
ClientVersion = Session.ClientVersion,
ServerVersion = Session.ServerVersion,
ClientPayload = _clientPayload,
ServerPayload = _serverPayload,
HostKey = _hostKey,
MinimumGroupSize = MinimumGroupSize,
PreferredGroupSize = PreferredGroupSize,
MaximumGroupSize = MaximumProupSize,
Prime = _prime,
SubGroup = _group,
ClientExchangeValue = _clientExchangeValue,
ServerExchangeValue = _serverExchangeValue,
SharedKey = SharedKey,
};
return Hash(groupExchangeHashData.GetBytes());
}
/// <inheritdoc/>
public override void Start(Session session, KeyExchangeInitMessage message, bool sendClientInitMessage)
{
base.Start(session, message, sendClientInitMessage);
// Register SSH_MSG_KEX_DH_GEX_GROUP message
Session.RegisterMessage("SSH_MSG_KEX_DH_GEX_GROUP");
// Subscribe to KeyExchangeDhGroupExchangeGroupReceived events
Session.KeyExchangeDhGroupExchangeGroupReceived += Session_KeyExchangeDhGroupExchangeGroupReceived;
// 1. client sends SSH_MSG_KEY_DH_GEX_REQUEST
SendMessage(new KeyExchangeDhGroupExchangeRequest(MinimumGroupSize, PreferredGroupSize, MaximumProupSize));
}
/// <summary>
/// Finishes key exchange algorithm.
/// </summary>
public override void Finish()
{
base.Finish();
Session.KeyExchangeDhGroupExchangeGroupReceived -= Session_KeyExchangeDhGroupExchangeGroupReceived;
Session.KeyExchangeDhGroupExchangeReplyReceived -= Session_KeyExchangeDhGroupExchangeReplyReceived;
}
private void Session_KeyExchangeDhGroupExchangeGroupReceived(object sender, MessageEventArgs<KeyExchangeDhGroupExchangeGroup> e)
{
// 2. server sends SSH_MSG_KEX_DH_GEX_GROUP
var groupMessage = e.Message;
// Unregister SSH_MSG_KEX_DH_GEX_GROUP message once received
Session.UnRegisterMessage("SSH_MSG_KEX_DH_GEX_GROUP");
// Unsubscribe from KeyExchangeDhGroupExchangeGroupReceived events
Session.KeyExchangeDhGroupExchangeGroupReceived -= Session_KeyExchangeDhGroupExchangeGroupReceived;
// Register in order to be able to receive SSH_MSG_KEX_DH_GEX_REPLY message
Session.RegisterMessage("SSH_MSG_KEX_DH_GEX_REPLY");
// Subscribe to KeyExchangeDhGroupExchangeReplyReceived events
Session.KeyExchangeDhGroupExchangeReplyReceived += Session_KeyExchangeDhGroupExchangeReplyReceived;
_prime = groupMessage.SafePrime;
_group = groupMessage.SubGroup;
PopulateClientExchangeValue();
// 3. client sends SSH_MSG_KEX_DH_GEX_INIT
SendMessage(new KeyExchangeDhGroupExchangeInit(_clientExchangeValue));
}
private void Session_KeyExchangeDhGroupExchangeReplyReceived(object sender, MessageEventArgs<KeyExchangeDhGroupExchangeReply> e)
{
// 4. server sends SSH_MSG_KEX_DH_GEX_REPLY
var replyMessage = e.Message;
// Unregister SSH_MSG_KEX_DH_GEX_REPLY message once received
Session.UnRegisterMessage("SSH_MSG_KEX_DH_GEX_REPLY");
// Unsubscribe from KeyExchangeDhGroupExchangeReplyReceived events
Session.KeyExchangeDhGroupExchangeReplyReceived -= Session_KeyExchangeDhGroupExchangeReplyReceived;
HandleServerDhReply(replyMessage.HostKey, replyMessage.F, replyMessage.Signature);
// When SSH_MSG_KEX_DH_GEX_REPLY received key exchange is completed
Finish();
}
}
}
src/Renci.SshNet/Security/KeyExchangeDiffieHellmanGroupSha1.cs
-33
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@@ -1,33 +0,0 @@
using Renci.SshNet.Abstractions;
namespace Renci.SshNet.Security
{
/// <summary>
/// Represents "diffie-hellman-group1-sha1" algorithm implementation.
/// </summary>
internal abstract class KeyExchangeDiffieHellmanGroupSha1 : KeyExchangeDiffieHellmanGroupShaBase
{
/// <summary>
/// Gets the size, in bits, of the computed hash code.
/// </summary>
/// <value>
/// The size, in bits, of the computed hash code.
/// </value>
protected override int HashSize
{
get { return 160; }
}
/// <summary>
/// Hashes the specified data bytes.
/// </summary>
/// <param name="hashData">The hash data.</param>
/// <returns>
/// The hash of the data.
/// </returns>
protected override byte[] Hash(byte[] hashData)
{
return CryptoAbstraction.HashSHA1(hashData);
}
}
}
src/Renci.SshNet/Security/KeyExchangeDiffieHellmanGroupSha256.cs
-33
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@@ -1,33 +0,0 @@
using Renci.SshNet.Abstractions;
namespace Renci.SshNet.Security
{
/// <summary>
/// Base class for "diffie-hellman" SHA-256 group algorithm implementations.
/// </summary>
internal abstract class KeyExchangeDiffieHellmanGroupSha256 : KeyExchangeDiffieHellmanGroupShaBase
{
/// <summary>
/// Gets the size, in bits, of the computed hash code.
/// </summary>
/// <value>
/// The size, in bits, of the computed hash code.
/// </value>
protected override int HashSize
{
get { return 256; }
}
/// <summary>
/// Hashes the specified data bytes.
/// </summary>
/// <param name="hashData">The hash data.</param>
/// <returns>
/// The hash of the data.
/// </returns>
protected override byte[] Hash(byte[] hashData)
{
return CryptoAbstraction.HashSHA256(hashData);
}
}
}
src/Renci.SshNet/Security/KeyExchangeDiffieHellmanGroupSha512.cs
-33
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@@ -1,33 +0,0 @@
using Renci.SshNet.Abstractions;
namespace Renci.SshNet.Security
{
/// <summary>
/// Base class for "diffie-hellman" SHA-512 group algorithm implementations.
/// </summary>
internal abstract class KeyExchangeDiffieHellmanGroupSha512 : KeyExchangeDiffieHellmanGroupShaBase
{
/// <summary>
/// Gets the size, in bits, of the computed hash code.
/// </summary>
/// <value>
/// The size, in bits, of the computed hash code.
/// </value>
protected override int HashSize
{
get { return 512; }
}
/// <summary>
/// Hashes the specified data bytes.
/// </summary>
/// <param name="hashData">The hash data.</param>
/// <returns>
/// The hash of the data.
/// </returns>
protected override byte[] Hash(byte[] hashData)
{
return CryptoAbstraction.HashSHA512(hashData);
}
}
}
src/Renci.SshNet/Security/KeyExchangeDiffieHellmanGroupShaBase.cs
-80
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@@ -1,80 +0,0 @@
using System.Numerics;
using Renci.SshNet.Messages.Transport;
namespace Renci.SshNet.Security
{
internal abstract class KeyExchangeDiffieHellmanGroupShaBase : KeyExchangeDiffieHellman
{
/// <summary>
/// Gets the group prime.
/// </summary>
/// <value>
/// The group prime.
/// </value>
public abstract BigInteger GroupPrime { get; }
/// <inheritdoc/>
public override void Start(Session session, KeyExchangeInitMessage message, bool sendClientInitMessage)
{
base.Start(session, message, sendClientInitMessage);
Session.RegisterMessage("SSH_MSG_KEXDH_REPLY");
Session.KeyExchangeDhReplyMessageReceived += Session_KeyExchangeDhReplyMessageReceived;
_prime = GroupPrime;
_group = 2;
PopulateClientExchangeValue();
SendMessage(new KeyExchangeDhInitMessage(_clientExchangeValue));
}
/// <summary>
/// Finishes key exchange algorithm.
/// </summary>
public override void Finish()
{
base.Finish();
Session.KeyExchangeDhReplyMessageReceived -= Session_KeyExchangeDhReplyMessageReceived;
}
/// <summary>
/// Calculates key exchange hash value.
/// </summary>
/// <returns>
/// Key exchange hash.
/// </returns>
protected override byte[] CalculateHash()
{
var keyExchangeHashData = new KeyExchangeHashData
{
ClientVersion = Session.ClientVersion,
ServerVersion = Session.ServerVersion,
ClientPayload = _clientPayload,
ServerPayload = _serverPayload,
HostKey = _hostKey,
ClientExchangeValue = _clientExchangeValue,
ServerExchangeValue = _serverExchangeValue,
SharedKey = SharedKey,
};
return Hash(keyExchangeHashData.GetBytes());
}
private void Session_KeyExchangeDhReplyMessageReceived(object sender, MessageEventArgs<KeyExchangeDhReplyMessage> e)
{
var message = e.Message;
// Unregister message once received
Session.UnRegisterMessage("SSH_MSG_KEXDH_REPLY");
HandleServerDhReply(message.HostKey, message.F, message.Signature);
// When SSH_MSG_KEXDH_REPLY received key exchange is completed
Finish();
}
}
}
src/Renci.SshNet/Security/KeyExchangeEC.cs
+2 -12
View File
@@ -44,12 +44,7 @@ namespace Renci.SshNet.Security
/// </value>
protected abstract int HashSize { get; }
/// <summary>
/// Calculates key exchange hash value.
/// </summary>
/// <returns>
/// Key exchange hash.
/// </returns>
/// <inheritdoc/>
protected override byte[] CalculateHash()
{
var hashData = new KeyExchangeHashData
@@ -67,12 +62,7 @@ namespace Renci.SshNet.Security
return Hash(hashData.GetBytes());
}
/// <summary>
/// Validates the exchange hash.
/// </summary>
/// <returns>
/// true if exchange hash is valid; otherwise false.
/// </returns>
/// <inheritdoc/>
protected override bool ValidateExchangeHash()
{
return ValidateExchangeHash(_hostKey, _signature);
test/Renci.SshNet.IntegrationTests/KeyExchangeAlgorithmTests.cs
-1
View File
@@ -158,7 +158,6 @@ namespace Renci.SshNet.IntegrationTests
}
[TestMethod]
[Ignore]
public void DiffieHellmanGroup18Sha512()
{
_remoteSshdConfig.ClearKeyExchangeAlgorithms()
test/Renci.SshNet.Tests/Classes/Security/KeyExchangeDiffieHellmanGroup14Sha1Test.cs
-61
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@@ -1,61 +0,0 @@
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Renci.SshNet.Common;
using Renci.SshNet.Security;
using Renci.SshNet.Tests.Common;
namespace Renci.SshNet.Tests.Classes.Security
{
[TestClass]
public class KeyExchangeDiffieHellmanGroup14Sha1Test : TestBase
{
private static readonly byte[] SecondOkleyGroup =
{
0x00,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc9, 0x0f, 0xda, 0xa2,
0x21, 0x68, 0xc2, 0x34, 0xc4, 0xc6, 0x62, 0x8b, 0x80, 0xdc, 0x1c, 0xd1,
0x29, 0x02, 0x4e, 0x08, 0x8a, 0x67, 0xcc, 0x74, 0x02, 0x0b, 0xbe, 0xa6,
0x3b, 0x13, 0x9b, 0x22, 0x51, 0x4a, 0x08, 0x79, 0x8e, 0x34, 0x04, 0xdd,
0xef, 0x95, 0x19, 0xb3, 0xcd, 0x3a, 0x43, 0x1b, 0x30, 0x2b, 0x0a, 0x6d,
0xf2, 0x5f, 0x14, 0x37, 0x4f, 0xe1, 0x35, 0x6d, 0x6d, 0x51, 0xc2, 0x45,
0xe4, 0x85, 0xb5, 0x76, 0x62, 0x5e, 0x7e, 0xc6, 0xf4, 0x4c, 0x42, 0xe9,
0xa6, 0x37, 0xed, 0x6b, 0x0b, 0xff, 0x5c, 0xb6, 0xf4, 0x06, 0xb7, 0xed,
0xee, 0x38, 0x6b, 0xfb, 0x5a, 0x89, 0x9f, 0xa5, 0xae, 0x9f, 0x24, 0x11,
0x7c, 0x4b, 0x1f, 0xe6, 0x49, 0x28, 0x66, 0x51, 0xec, 0xe4, 0x5b, 0x3d,
0xc2, 0x00, 0x7c, 0xb8, 0xa1, 0x63, 0xbf, 0x05, 0x98, 0xda, 0x48, 0x36,
0x1c, 0x55, 0xd3, 0x9a, 0x69, 0x16, 0x3f, 0xa8, 0xfd, 0x24, 0xcf, 0x5f,
0x83, 0x65, 0x5d, 0x23, 0xdc, 0xa3, 0xad, 0x96, 0x1c, 0x62, 0xf3, 0x56,
0x20, 0x85, 0x52, 0xbb, 0x9e, 0xd5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6d,
0x67, 0x0c, 0x35, 0x4e, 0x4a, 0xbc, 0x98, 0x04, 0xf1, 0x74, 0x6c, 0x08,
0xca, 0x18, 0x21, 0x7c, 0x32, 0x90, 0x5e, 0x46, 0x2e, 0x36, 0xce, 0x3b,
0xe3, 0x9e, 0x77, 0x2c, 0x18, 0x0e, 0x86, 0x03, 0x9b, 0x27, 0x83, 0xa2,
0xec, 0x07, 0xa2, 0x8f, 0xb5, 0xc5, 0x5d, 0xf0, 0x6f, 0x4c, 0x52, 0xc9,
0xde, 0x2b, 0xcb, 0xf6, 0x95, 0x58, 0x17, 0x18, 0x39, 0x95, 0x49, 0x7c,
0xea, 0x95, 0x6a, 0xe5, 0x15, 0xd2, 0x26, 0x18, 0x98, 0xfa, 0x05, 0x10,
0x15, 0x72, 0x8e, 0x5a, 0x8a, 0xac, 0xaa, 0x68, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff
};
private KeyExchangeDiffieHellmanGroup14Sha1 _group14;
protected override void OnInit()
{
base.OnInit();
_group14 = new KeyExchangeDiffieHellmanGroup14Sha1();
}
[TestMethod]
public void GroupPrimeShouldBeSecondOakleyGroup()
{
var bytes = _group14.GroupPrime.ToByteArray(isBigEndian: true);
Assert.IsTrue(SecondOkleyGroup.IsEqualTo(bytes));
}
[TestMethod]
public void NameShouldBeDiffieHellmanGroup14Sha1()
{
Assert.AreEqual("diffie-hellman-group14-sha1", _group14.Name);
}
}
}
test/Renci.SshNet.Tests/Classes/Security/KeyExchangeDiffieHellmanGroup14Sha256Test.cs
-61
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@@ -1,61 +0,0 @@
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Renci.SshNet.Common;
using Renci.SshNet.Security;
using Renci.SshNet.Tests.Common;
namespace Renci.SshNet.Tests.Classes.Security
{
[TestClass]
public class KeyExchangeDiffieHellmanGroup14Sha256Test : TestBase
{
private static readonly byte[] SecondOkleyGroup =
{
0x00,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc9, 0x0f, 0xda, 0xa2,
0x21, 0x68, 0xc2, 0x34, 0xc4, 0xc6, 0x62, 0x8b, 0x80, 0xdc, 0x1c, 0xd1,
0x29, 0x02, 0x4e, 0x08, 0x8a, 0x67, 0xcc, 0x74, 0x02, 0x0b, 0xbe, 0xa6,
0x3b, 0x13, 0x9b, 0x22, 0x51, 0x4a, 0x08, 0x79, 0x8e, 0x34, 0x04, 0xdd,
0xef, 0x95, 0x19, 0xb3, 0xcd, 0x3a, 0x43, 0x1b, 0x30, 0x2b, 0x0a, 0x6d,
0xf2, 0x5f, 0x14, 0x37, 0x4f, 0xe1, 0x35, 0x6d, 0x6d, 0x51, 0xc2, 0x45,
0xe4, 0x85, 0xb5, 0x76, 0x62, 0x5e, 0x7e, 0xc6, 0xf4, 0x4c, 0x42, 0xe9,
0xa6, 0x37, 0xed, 0x6b, 0x0b, 0xff, 0x5c, 0xb6, 0xf4, 0x06, 0xb7, 0xed,
0xee, 0x38, 0x6b, 0xfb, 0x5a, 0x89, 0x9f, 0xa5, 0xae, 0x9f, 0x24, 0x11,
0x7c, 0x4b, 0x1f, 0xe6, 0x49, 0x28, 0x66, 0x51, 0xec, 0xe4, 0x5b, 0x3d,
0xc2, 0x00, 0x7c, 0xb8, 0xa1, 0x63, 0xbf, 0x05, 0x98, 0xda, 0x48, 0x36,
0x1c, 0x55, 0xd3, 0x9a, 0x69, 0x16, 0x3f, 0xa8, 0xfd, 0x24, 0xcf, 0x5f,
0x83, 0x65, 0x5d, 0x23, 0xdc, 0xa3, 0xad, 0x96, 0x1c, 0x62, 0xf3, 0x56,
0x20, 0x85, 0x52, 0xbb, 0x9e, 0xd5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6d,
0x67, 0x0c, 0x35, 0x4e, 0x4a, 0xbc, 0x98, 0x04, 0xf1, 0x74, 0x6c, 0x08,
0xca, 0x18, 0x21, 0x7c, 0x32, 0x90, 0x5e, 0x46, 0x2e, 0x36, 0xce, 0x3b,
0xe3, 0x9e, 0x77, 0x2c, 0x18, 0x0e, 0x86, 0x03, 0x9b, 0x27, 0x83, 0xa2,
0xec, 0x07, 0xa2, 0x8f, 0xb5, 0xc5, 0x5d, 0xf0, 0x6f, 0x4c, 0x52, 0xc9,
0xde, 0x2b, 0xcb, 0xf6, 0x95, 0x58, 0x17, 0x18, 0x39, 0x95, 0x49, 0x7c,
0xea, 0x95, 0x6a, 0xe5, 0x15, 0xd2, 0x26, 0x18, 0x98, 0xfa, 0x05, 0x10,
0x15, 0x72, 0x8e, 0x5a, 0x8a, 0xac, 0xaa, 0x68, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff
};
private KeyExchangeDiffieHellmanGroup14Sha256 _group14;
protected override void OnInit()
{
base.OnInit();
_group14 = new KeyExchangeDiffieHellmanGroup14Sha256();
}
[TestMethod]
public void GroupPrimeShouldBeSecondOakleyGroup()
{
var bytes = _group14.GroupPrime.ToByteArray(isBigEndian: true);
Assert.IsTrue(SecondOkleyGroup.IsEqualTo(bytes));
}
[TestMethod]
public void NameShouldBeDiffieHellmanGroup14Sha256()
{
Assert.AreEqual("diffie-hellman-group14-sha256", _group14.Name);
}
}
}
test/Renci.SshNet.Tests/Classes/Security/KeyExchangeDiffieHellmanGroup16Sha512Test.cs
-71
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@@ -1,71 +0,0 @@
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Renci.SshNet.Common;
using Renci.SshNet.Security;
using Renci.SshNet.Tests.Common;
namespace Renci.SshNet.Tests.Classes.Security
{
[TestClass]
public class KeyExchangeDiffieHellmanGroup16Sha512Test : TestBase
{
private static readonly byte[] MoreModularExponentialGroup16 =
{
0x00,
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xc9,0x0f,0xda,0xa2,0x21,0x68,0xc2,0x34,
0xc4,0xc6,0x62,0x8b,0x80,0xdc,0x1c,0xd1,0x29,0x02,0x4e,0x08,0x8a,0x67,0xcc,0x74,
0x02,0x0b,0xbe,0xa6,0x3b,0x13,0x9b,0x22,0x51,0x4a,0x08,0x79,0x8e,0x34,0x04,0xdd,
0xef,0x95,0x19,0xb3,0xcd,0x3a,0x43,0x1b,0x30,0x2b,0x0a,0x6d,0xf2,0x5f,0x14,0x37,
0x4f,0xe1,0x35,0x6d,0x6d,0x51,0xc2,0x45,0xe4,0x85,0xb5,0x76,0x62,0x5e,0x7e,0xc6,
0xf4,0x4c,0x42,0xe9,0xa6,0x37,0xed,0x6b,0x0b,0xff,0x5c,0xb6,0xf4,0x06,0xb7,0xed,
0xee,0x38,0x6b,0xfb,0x5a,0x89,0x9f,0xa5,0xae,0x9f,0x24,0x11,0x7c,0x4b,0x1f,0xe6,
0x49,0x28,0x66,0x51,0xec,0xe4,0x5b,0x3d,0xc2,0x00,0x7c,0xb8,0xa1,0x63,0xbf,0x05,
0x98,0xda,0x48,0x36,0x1c,0x55,0xd3,0x9a,0x69,0x16,0x3f,0xa8,0xfd,0x24,0xcf,0x5f,
0x83,0x65,0x5d,0x23,0xdc,0xa3,0xad,0x96,0x1c,0x62,0xf3,0x56,0x20,0x85,0x52,0xbb,
0x9e,0xd5,0x29,0x07,0x70,0x96,0x96,0x6d,0x67,0x0c,0x35,0x4e,0x4a,0xbc,0x98,0x04,
0xf1,0x74,0x6c,0x08,0xca,0x18,0x21,0x7c,0x32,0x90,0x5e,0x46,0x2e,0x36,0xce,0x3b,
0xe3,0x9e,0x77,0x2c,0x18,0x0e,0x86,0x03,0x9b,0x27,0x83,0xa2,0xec,0x07,0xa2,0x8f,
0xb5,0xc5,0x5d,0xf0,0x6f,0x4c,0x52,0xc9,0xde,0x2b,0xcb,0xf6,0x95,0x58,0x17,0x18,
0x39,0x95,0x49,0x7c,0xea,0x95,0x6a,0xe5,0x15,0xd2,0x26,0x18,0x98,0xfa,0x05,0x10,
0x15,0x72,0x8e,0x5a,0x8a,0xaa,0xc4,0x2d,0xad,0x33,0x17,0x0d,0x04,0x50,0x7a,0x33,
0xa8,0x55,0x21,0xab,0xdf,0x1c,0xba,0x64,0xec,0xfb,0x85,0x04,0x58,0xdb,0xef,0x0a,
0x8a,0xea,0x71,0x57,0x5d,0x06,0x0c,0x7d,0xb3,0x97,0x0f,0x85,0xa6,0xe1,0xe4,0xc7,
0xab,0xf5,0xae,0x8c,0xdb,0x09,0x33,0xd7,0x1e,0x8c,0x94,0xe0,0x4a,0x25,0x61,0x9d,
0xce,0xe3,0xd2,0x26,0x1a,0xd2,0xee,0x6b,0xf1,0x2f,0xfa,0x06,0xd9,0x8a,0x08,0x64,
0xd8,0x76,0x02,0x73,0x3e,0xc8,0x6a,0x64,0x52,0x1f,0x2b,0x18,0x17,0x7b,0x20,0x0c,
0xbb,0xe1,0x17,0x57,0x7a,0x61,0x5d,0x6c,0x77,0x09,0x88,0xc0,0xba,0xd9,0x46,0xe2,
0x08,0xe2,0x4f,0xa0,0x74,0xe5,0xab,0x31,0x43,0xdb,0x5b,0xfc,0xe0,0xfd,0x10,0x8e,
0x4b,0x82,0xd1,0x20,0xa9,0x21,0x08,0x01,0x1a,0x72,0x3c,0x12,0xa7,0x87,0xe6,0xd7,
0x88,0x71,0x9a,0x10,0xbd,0xba,0x5b,0x26,0x99,0xc3,0x27,0x18,0x6a,0xf4,0xe2,0x3c,
0x1a,0x94,0x68,0x34,0xb6,0x15,0x0b,0xda,0x25,0x83,0xe9,0xca,0x2a,0xd4,0x4c,0xe8,
0xdb,0xbb,0xc2,0xdb,0x04,0xde,0x8e,0xf9,0x2e,0x8e,0xfc,0x14,0x1f,0xbe,0xca,0xa6,
0x28,0x7c,0x59,0x47,0x4e,0x6b,0xc0,0x5d,0x99,0xb2,0x96,0x4f,0xa0,0x90,0xc3,0xa2,
0x23,0x3b,0xa1,0x86,0x51,0x5b,0xe7,0xed,0x1f,0x61,0x29,0x70,0xce,0xe2,0xd7,0xaf,
0xb8,0x1b,0xdd,0x76,0x21,0x70,0x48,0x1c,0xd0,0x06,0x91,0x27,0xd5,0xb0,0x5a,0xa9,
0x93,0xb4,0xea,0x98,0x8d,0x8f,0xdd,0xc1,0x86,0xff,0xb7,0xdc,0x90,0xa6,0xc0,0x8f,
0x4d,0xf4,0x35,0xc9,0x34,0x06,0x31,0x99,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff
};
private KeyExchangeDiffieHellmanGroup16Sha512 _group16;
protected override void OnInit()
{
base.OnInit();
_group16 = new KeyExchangeDiffieHellmanGroup16Sha512();
}
[TestMethod]
public void GroupPrimeShouldBeMoreModularExponentialGroup16()
{
var bytes = _group16.GroupPrime.ToByteArray(isBigEndian: true);
Assert.IsTrue(MoreModularExponentialGroup16.IsEqualTo(bytes));
}
[TestMethod]
public void NameShouldBeDiffieHellmanGroup16Sha512()
{
Assert.AreEqual("diffie-hellman-group16-sha512", _group16.Name);
}
}
}
test/Renci.SshNet.Tests/Classes/Security/KeyExchangeDiffieHellmanGroup1Sha1Test.cs
-54
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@@ -1,54 +0,0 @@
using System.Linq;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Renci.SshNet.Common;
using Renci.SshNet.Security;
using Renci.SshNet.Tests.Common;
namespace Renci.SshNet.Tests.Classes.Security
{
[TestClass]
public class KeyExchangeDiffieHellmanGroup1Sha1Test : TestBase
{
private static readonly byte[] SecondOkleyGroup =
{
0x00,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc9, 0x0f, 0xda, 0xa2,
0x21, 0x68, 0xc2, 0x34, 0xc4, 0xc6, 0x62, 0x8b, 0x80, 0xdc, 0x1c, 0xd1,
0x29, 0x02, 0x4e, 0x08, 0x8a, 0x67, 0xcc, 0x74, 0x02, 0x0b, 0xbe, 0xa6,
0x3b, 0x13, 0x9b, 0x22, 0x51, 0x4a, 0x08, 0x79, 0x8e, 0x34, 0x04, 0xdd,
0xef, 0x95, 0x19, 0xb3, 0xcd, 0x3a, 0x43, 0x1b, 0x30, 0x2b, 0x0a, 0x6d,
0xf2, 0x5f, 0x14, 0x37, 0x4f, 0xe1, 0x35, 0x6d, 0x6d, 0x51, 0xc2, 0x45,
0xe4, 0x85, 0xb5, 0x76, 0x62, 0x5e, 0x7e, 0xc6, 0xf4, 0x4c, 0x42, 0xe9,
0xa6, 0x37, 0xed, 0x6b, 0x0b, 0xff, 0x5c, 0xb6, 0xf4, 0x06, 0xb7, 0xed,
0xee, 0x38, 0x6b, 0xfb, 0x5a, 0x89, 0x9f, 0xa5, 0xae, 0x9f, 0x24, 0x11,
0x7c, 0x4b, 0x1f, 0xe6, 0x49, 0x28, 0x66, 0x51, 0xec, 0xe6, 0x53, 0x81,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};
private KeyExchangeDiffieHellmanGroup1Sha1 _group1;
protected override void OnInit()
{
base.OnInit();
_group1 = new KeyExchangeDiffieHellmanGroup1Sha1();
}
[TestMethod]
public void GroupPrimeShouldBeSecondOakleyGroup()
{
var bytes = _group1.GroupPrime.ToByteArray(isBigEndian: true);
Assert.IsTrue(SecondOkleyGroup.IsEqualTo(bytes));
SecondOkleyGroup.Reverse().DebugPrint();
}
[TestMethod]
public void NameShouldBeDiffieHellmanGroup1Sha1()
{
Assert.AreEqual("diffie-hellman-group1-sha1", _group1.Name);
}
}
}
test/Renci.SshNet.Tests/Classes/Security/KeyExchangeDiffieHellmanGroupExchangeTest.cs
+54
View File
@@ -0,0 +1,54 @@
using System;
using System.Security.Cryptography;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Renci.SshNet.Security;
namespace Renci.SshNet.Tests.Classes.Security
{
[TestClass]
public class KeyExchangeDiffieHellmanGroupExchangeTest
{
[TestMethod]
public void NameShouldBeCtorValue()
{
KeyExchangeDiffieHellmanGroupExchange kex = new("diffie-hellman-group-exchange-sha256", HashAlgorithmName.SHA512);
Assert.AreEqual("diffie-hellman-group-exchange-sha256", kex.Name);
}
[TestMethod]
public void Ctor_ArgumentNullException()
{
var ex = Assert.Throws<ArgumentNullException>(() => new KeyExchangeDiffieHellmanGroupExchange(name: null, HashAlgorithmName.SHA512));
Assert.AreEqual("name", ex.ParamName);
ex = Assert.Throws<ArgumentNullException>(() => new KeyExchangeDiffieHellmanGroupExchange("kex", default));
Assert.AreEqual("hashAlgorithm", ex.ParamName);
ex = Assert.Throws<ArgumentNullException>(() => new KeyExchangeDiffieHellmanGroupExchange("kex", new HashAlgorithmName(null)));
Assert.AreEqual("hashAlgorithm", ex.ParamName);
}
[TestMethod]
public void Ctor_InvalidHashAlgorithm_ThrowsArgumentException()
{
var ex = Assert.ThrowsExactly<ArgumentException>(() => new KeyExchangeDiffieHellmanGroupExchange("kex", new HashAlgorithmName("bad")));
Assert.AreEqual("hashAlgorithm", ex.ParamName);
ex = Assert.ThrowsExactly<ArgumentException>(() => new KeyExchangeDiffieHellmanGroupExchange("kex", new HashAlgorithmName("")));
Assert.AreEqual("hashAlgorithm", ex.ParamName);
}
[TestMethod]
public void Ctor_InvalidGroupSizes_ThrowsArgumentOutOfRangeException()
{
var ex = Assert.Throws<ArgumentOutOfRangeException>(() => new KeyExchangeDiffieHellmanGroupExchange("kex", HashAlgorithmName.SHA512, 1024, 4096, 2048));
Assert.AreEqual("preferredGroupSize", ex.ParamName);
ex = Assert.Throws<ArgumentOutOfRangeException>(() => new KeyExchangeDiffieHellmanGroupExchange("kex", HashAlgorithmName.SHA512, 8192, 4096, 2048));
Assert.AreEqual("preferredGroupSize", ex.ParamName);
}
}
}
test/Renci.SshNet.Tests/Classes/Security/KeyExchangeDiffieHellmanTest.cs
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using System;
using System.Security.Cryptography;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Org.BouncyCastle.Crypto.Agreement;
using Renci.SshNet.Security;
namespace Renci.SshNet.Tests.Classes.Security
{
[TestClass]
public class KeyExchangeDiffieHellmanTest
{
[TestMethod]
public void NameShouldBeCtorValue()
{
KeyExchangeDiffieHellman kex = new("diffie-hellman-group16-sha512", DHStandardGroups.rfc3526_4096, HashAlgorithmName.SHA512);
Assert.AreEqual("diffie-hellman-group16-sha512", kex.Name);
}
[TestMethod]
public void Ctor_ArgumentNullException()
{
var ex = Assert.Throws<ArgumentNullException>(() => new KeyExchangeDiffieHellman(name: null, DHStandardGroups.rfc3526_4096, HashAlgorithmName.SHA512));
Assert.AreEqual("name", ex.ParamName);
ex = Assert.Throws<ArgumentNullException>(() => new KeyExchangeDiffieHellman("kex", parameters: null, HashAlgorithmName.SHA512));
Assert.AreEqual("parameters", ex.ParamName);
ex = Assert.Throws<ArgumentNullException>(() => new KeyExchangeDiffieHellman("kex", DHStandardGroups.rfc3526_4096, default));
Assert.AreEqual("hashAlgorithm", ex.ParamName);
ex = Assert.Throws<ArgumentNullException>(() => new KeyExchangeDiffieHellman("kex", DHStandardGroups.rfc3526_4096, new HashAlgorithmName(null)));
Assert.AreEqual("hashAlgorithm", ex.ParamName);
}
[TestMethod]
public void Ctor_InvalidHashAlgorithm_ThrowsArgumentException()
{
var ex = Assert.ThrowsExactly<ArgumentException>(() => new KeyExchangeDiffieHellman("kex", DHStandardGroups.rfc3526_4096, new HashAlgorithmName("bad")));
Assert.AreEqual("hashAlgorithm", ex.ParamName);
ex = Assert.ThrowsExactly<ArgumentException>(() => new KeyExchangeDiffieHellman("kex", DHStandardGroups.rfc3526_4096, new HashAlgorithmName("")));
Assert.AreEqual("hashAlgorithm", ex.ParamName);
}
}
}