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mirror of https://github.com/esiur/esiur-dotnet.git synced 2026-06-13 22:48:42 +00:00
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2026-05-24 18:27:22 +03:00
parent a6e8bed31d
commit eb323e8bf8
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using Esiur.Misc;
using Esiur.Security.Permissions;
using Org.BouncyCastle.Crypto.Digests;
using System;
using System.Collections.Generic;
using System.Text;
using Esiur.Data;
using Esiur.Data.Types;
namespace Esiur.Security.Authority.Providers
{
internal class PasswordAuthenticationHandler : IAuthenticationHandler
{
public string Protocol => "hash";
byte[] localNonce, remoteNonce;
byte[] localSalt, remoteSalt;
string initiatorIdentity, responderIdentity;
byte[] initiatorPassword, responderPassword;
string hostName, domain;
int step = 0;
AuthenticationMode mode;
AuthenticationDirection direction;
PasswordAuthenticationProvider provider;
public byte[] ComputeSha3(byte[] data, int bitLength = 256)
{
// 1. Initialize the digest (supports 224, 256, 384, 512)
var digest = new Sha3Digest(bitLength);
// 3. Update the digest with data
digest.BlockUpdate(data, 0, data.Length);
// 4. Retrieve the final hash
byte[] result = new byte[digest.GetDigestSize()];
digest.DoFinal(result, 0);
return result;
}
public AuthenticationResult Process(object authData)
{
var remoteAuthData = (object[])authData;
var localAuthData = new List<object>();
if (direction == AuthenticationDirection.Initiator)
{
if (mode == AuthenticationMode.None)
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
else if (mode == AuthenticationMode.InitializerIdentity)
{
if (step == 0)
{
// step 0: send local nonce and initiator identity.
if (initiatorIdentity == null)
(initiatorIdentity, initiatorPassword) = provider.GetSelfIdentityAndCredential(domain, hostName);
else
initiatorPassword = provider.GetSelfCredential(initiatorIdentity, domain, hostName);
if (initiatorPassword == null || initiatorIdentity == null)
return new AuthenticationResult(AuthenticationRuling.Failed, null);
// send local nonce and initiator identity
localAuthData.Add(localNonce);
localAuthData.Add(initiatorIdentity);
return new AuthenticationResult(AuthenticationRuling.InProgress, localAuthData);
}
else if (step == 1)
{
// expect remote nonce, salt and challenge.
remoteNonce = (byte[])remoteAuthData[0];
remoteSalt = (byte[])remoteAuthData[1];
var remoteChallenge = (byte[])remoteAuthData[2];
// prevent reply attack by checking if remote nonce is same as local nonce.
if (remoteNonce.SequenceEqual(localNonce))
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// make salted hash of password.
var hashedPassword = ComputeSha3(initiatorPassword.Concat(remoteSalt).ToArray());
var expectedRemoteChallenge = ComputeSha3(remoteNonce.Concat(hashedPassword)
.Concat(localNonce)
.ToArray());
// compare remote challenge
if (!remoteChallenge.SequenceEqual(expectedRemoteChallenge))
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// make hash challenge response.
var localChallenge = ComputeSha3(localNonce.Concat(hashedPassword)
.Concat(remoteNonce)
.ToArray());
localAuthData.Add(localChallenge);
step = -1;
// derive a session key from nonces and password.
// initiator identity + initiator password + initiator nonce + responder nonce
var sessionKey = ComputeSha3(initiatorIdentity.ToBytes()
.Concat(hashedPassword)
.Concat(localNonce)
.Concat(remoteNonce)
.ToArray(), 512);
return new AuthenticationResult(AuthenticationRuling.Succeeded, localAuthData, initiatorIdentity, null, sessionKey);
}
else
{
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
}
else if (mode == AuthenticationMode.ResponderIdentity)
{
if (step == 0)
{
// just send local nonce.
localAuthData.Add(localNonce);
return new AuthenticationResult(AuthenticationRuling.InProgress, localAuthData);
}
else if (step == 1)
{
// expect responder identity and nonce.
remoteNonce = (byte[])remoteAuthData[0];
responderIdentity = (string)remoteAuthData[1];
// prevent reply attack by checking if remote nonce is same as local nonce.
if (remoteNonce.SequenceEqual(localNonce))
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// check if responder identity is valid and get password.
(localSalt, responderPassword) = provider.GetHostedAccountCredential(responderIdentity, domain);
if (responderPassword == null)
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// make hash challenge response.
var localChallenge = ComputeSha3(localNonce.Concat(responderPassword)
.Concat(remoteNonce)
.ToArray());
// send localSalt and challenge
localAuthData.Add(localSalt);
localAuthData.Add(localChallenge);
step = 2;
return new AuthenticationResult(AuthenticationRuling.InProgress, localAuthData);
}
else if (step == 2)
{
// expect remote challenge.
var remoteChallenge = (byte[])remoteAuthData[0];
// compare remote challenge
var expectedRemoteChallenge = ComputeSha3(remoteNonce.Concat(responderPassword)
.Concat(localNonce)
.ToArray());
if (!remoteChallenge.SequenceEqual(expectedRemoteChallenge))
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// derive a session key from nonces and password.
// responder identity + responder hashed password + initiator nonce + responder nonce
var sessionKey = ComputeSha3(responderIdentity.ToBytes()
.Concat(responderPassword)
.Concat(localNonce)
.Concat(remoteNonce)
.ToArray(), 512);
step = -1;
return new AuthenticationResult(AuthenticationRuling.Succeeded, null, initiatorIdentity, responderIdentity, sessionKey);
}
else
{
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
}
else if (mode == AuthenticationMode.DualIdentity)
{
if (step == 0)
{
// step 0: send local nonce and initiator identity.
if (initiatorIdentity == null)
(initiatorIdentity, initiatorPassword) = provider.GetSelfIdentityAndCredential(domain, hostName);
else
initiatorPassword = provider.GetSelfCredential(initiatorIdentity, domain, hostName);
if (initiatorPassword == null || initiatorIdentity == null)
{
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
localAuthData.Add(localNonce);
localAuthData.Add(initiatorIdentity);
return new AuthenticationResult(AuthenticationRuling.InProgress, localAuthData);
}
else if (step == 1)
{
// expect responder identity, nonce and salt.
remoteNonce = (byte[])remoteAuthData[0];
responderIdentity = (string)remoteAuthData[1];
remoteSalt = (byte[])remoteAuthData[2];
// prevent reply attack by checking if remote nonce is same as local nonce.
if (remoteNonce.SequenceEqual(localNonce))
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// check if responder identity is valid and get password.
(localSalt, responderPassword) = provider.GetHostedAccountCredential(responderIdentity, domain);
if (responderPassword == null)
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// make salted hash of password.
var hashedPassword = ComputeSha3(initiatorPassword.Concat(remoteSalt).ToArray());
// make hash challenge response.
var localChallenge = ComputeSha3(localNonce.Concat(hashedPassword)
.Concat(responderPassword)
.Concat(remoteNonce)
.ToArray());
// send localSalt and challenge
localAuthData.Add(localSalt);
localAuthData.Add(localChallenge);
step = 2;
return new AuthenticationResult(AuthenticationRuling.InProgress, localAuthData);
}
else if (step == 2)
{
// expect remote challenge.
var remoteChallenge = (byte[])remoteAuthData[0];
// make salted hash of password.
var hashedPassword = ComputeSha3(initiatorPassword.Concat(remoteSalt).ToArray());
// compare remote challenge
var expectedRemoteChallenge = ComputeSha3(remoteNonce.Concat(hashedPassword)
.Concat(responderPassword)
.Concat(localNonce)
.ToArray());
if (!remoteChallenge.SequenceEqual(expectedRemoteChallenge))
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// derive a session key from nonces and password.
// responder identity + responder password + initiator nonce + responder nonce
var sessionKey = ComputeSha3(initiatorIdentity.ToBytes()
.Concat(responderIdentity.ToBytes())
.Concat(hashedPassword)
.Concat(responderPassword)
.Concat(localNonce)
.Concat(remoteNonce)
.ToArray(), 512);
step = -1;
return new AuthenticationResult(AuthenticationRuling.Succeeded, null, initiatorIdentity, responderIdentity, sessionKey);
}
else
{
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
}
}
else if (direction == AuthenticationDirection.Responder)
{
if (mode == AuthenticationMode.None)
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
else if (mode == AuthenticationMode.InitializerIdentity)
{
if (step == 0)
{
if (remoteAuthData.Length < 2)
return new AuthenticationResult(AuthenticationRuling.Failed, null);
// step 0: expect remote nonce and initiator identity.
remoteNonce = (byte[])remoteAuthData[0];
initiatorIdentity = (string)remoteAuthData[1];
// prevent reply attack by checking if remote nonce is same as local nonce.
// @TODO: We can change our localNonce then send it
if (remoteNonce.SequenceEqual(localNonce))
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// get initiator password from provider.
(localSalt, initiatorPassword) = provider.GetHostedAccountCredential(initiatorIdentity, domain);
// account not found or no password for this account.
if (initiatorPassword == null || initiatorIdentity == null)
{
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
var localChallenge = ComputeSha3(localNonce.Concat(initiatorPassword)
.Concat(remoteNonce)
.ToArray());
// send local nonce, salt and challenge.
localAuthData.Add(localNonce);
localAuthData.Add(localSalt);
localAuthData.Add(localChallenge);
step = 1;
return new AuthenticationResult(AuthenticationRuling.InProgress,
localAuthData);
}
else if (step == 1)
{
// expect challenge response.
var remoteChallenge = (byte[])remoteAuthData[0];
var expectedRemoteChallenge = ComputeSha3(remoteNonce.Concat(initiatorPassword)
.Concat(localNonce)
.ToArray());
// compare remote challenge
if (!expectedRemoteChallenge.SequenceEqual(remoteChallenge))
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// compute session key.
// derive a session key from nonces and password.
// initiator identity + initiator password + initiator nonce + responder nonce
var sessionKey = ComputeSha3(initiatorIdentity.ToBytes()
.Concat(initiatorPassword)
.Concat(remoteNonce)
.Concat(localNonce)
.ToArray(), 512);
step = -1;
return new AuthenticationResult(AuthenticationRuling.Succeeded, null, initiatorIdentity, responderIdentity, sessionKey);
}
else
{
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
}
else if (mode == AuthenticationMode.ResponderIdentity)
{
if (step == 0)
{
if (remoteAuthData.Length < 1)
return new AuthenticationResult(AuthenticationRuling.Failed, null);
// step 0: receive remote nonce.
remoteNonce = (byte[])remoteAuthData[0];
// prevent reply attack by checking if remote nonce is same as local nonce.
// @TODO: We can change our localNonce then send it
if (remoteNonce.SequenceEqual(localNonce))
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// get responder identity from provider.
if (responderIdentity == null)
(responderIdentity, responderPassword) = provider.GetSelfIdentityAndCredential(domain, hostName);
else
responderPassword = provider.GetSelfCredential(responderIdentity, domain, hostName);
if (responderPassword == null || responderIdentity == null)
{
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
localAuthData.Add(localNonce);
localAuthData.Add(responderIdentity);
step = 1;
// send local nonce and identity.
return new AuthenticationResult(AuthenticationRuling.InProgress,
localAuthData
);
}
else if (step == 1)
{
// expect remote salt and challenge.
remoteSalt = (byte[])remoteAuthData[0];
var remoteChallenge = (byte[])remoteAuthData[1];
// compute expected challenge response.
var hashedPassword = ComputeSha3(responderPassword.Concat(remoteSalt).ToArray());
var expectedRemoteChallenge = ComputeSha3(remoteNonce.Concat(hashedPassword)
.Concat(localNonce)
.ToArray());
// compare remote challenge
if (!expectedRemoteChallenge.SequenceEqual(remoteChallenge))
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// compute our challenge response.
var localChallenge = ComputeSha3(localNonce.Concat(hashedPassword)
.Concat(remoteNonce)
.ToArray());
// derive a session key from nonces and password.
// responder identity + responder hashed password + initiator nonce + responder nonce
var sessionKey = ComputeSha3(responderIdentity.ToBytes()
.Concat(hashedPassword)
.Concat(remoteNonce)
.Concat(localNonce)
.ToArray(), 512);
localAuthData.Add(localChallenge);
step = -1;
return new AuthenticationResult(AuthenticationRuling.Succeeded, localAuthData, responderIdentity, null, sessionKey);
}
else
{
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
}
else if (mode == AuthenticationMode.DualIdentity)
{
if (step == 0)
{
if (remoteAuthData.Length < 2)
return new AuthenticationResult(AuthenticationRuling.Failed, null);
// step 0: receive remote nonce and initiator identity.
remoteNonce = (byte[])remoteAuthData[0];
initiatorIdentity = (string)remoteAuthData[1];
// prevent reply attack by checking if remote nonce is same as local nonce.
// @TODO: We can change our localNonce then send it
if (remoteNonce.SequenceEqual(localNonce))
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// get responder identity from provider.
if (responderIdentity == null)
(responderIdentity, responderPassword) = provider.GetSelfIdentityAndCredential(domain, hostName);
else
responderPassword = provider.GetSelfCredential(responderIdentity, domain, hostName);
if (responderPassword == null || responderIdentity == null)
{
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// get initiator password from provider.
(localSalt, initiatorPassword) = provider.GetHostedAccountCredential(initiatorIdentity, domain);
// account not found or no password for this account.
if (initiatorPassword == null || initiatorIdentity == null)
{
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// send local nonce, salt and responder identity.
localAuthData.Add(localNonce);
localAuthData.Add(localSalt);
localAuthData.Add(responderIdentity);
step = 1;
// send local nonce and identity.
return new AuthenticationResult(AuthenticationRuling.InProgress,
localAuthData
);
}
else if (step == 1)
{
// expect initiator salt and challenge.
var remoteSalt = (byte[])remoteAuthData[0];
var remoteChallenge = (byte[])remoteAuthData[1];
// compute expected challenge response.
var hashedPassword = ComputeSha3(responderPassword.Concat(remoteSalt).ToArray());
// compare remote challenge
var expectedRemoteChallenge = ComputeSha3(remoteNonce.Concat(initiatorPassword)
.Concat(hashedPassword)
.Concat(localNonce)
.ToArray());
// compare remote challenge
if (!expectedRemoteChallenge.SequenceEqual(remoteChallenge))
{
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
// compute our challenge
var localChallenge = ComputeSha3(localNonce.Concat(hashedPassword)
.Concat(initiatorPassword)
.Concat(remoteNonce)
.ToArray());
localAuthData.Add(localChallenge);
// derive a session key from nonces and password.
// responder identity + responder password + initiator nonce + responder nonce
var sessionKey = ComputeSha3(initiatorIdentity.ToBytes()
.Concat(responderIdentity.ToBytes())
.Concat(initiatorPassword)
.Concat(hashedPassword)
.Concat(remoteNonce)
.Concat(localNonce)
.ToArray(), 512);
step = -1;
return new AuthenticationResult(AuthenticationRuling.Succeeded, localAuthData, initiatorIdentity, responderIdentity, sessionKey);
}
else
{
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
}
}
step = -1;
return new AuthenticationResult(AuthenticationRuling.Failed, null);
}
public PasswordAuthenticationHandler(AuthenticationMode mode,
AuthenticationDirection direction,
string initiatorIdentity,
string responderIdentity,
string hostName,
string domain,
PasswordAuthenticationProvider provider)
{
localNonce = Global.GenerateBytes(20);
this.provider = provider;
this.initiatorIdentity = initiatorIdentity;
this.responderIdentity = responderIdentity;
this.mode = mode;
this.direction = direction;
this.domain = domain;
this.hostName = hostName;
}
}
}