private bool VerifyCounterSignature(PKCS7.SignerInfo cs, byte[] signature)
{
if (cs.Version != 1)
{
return(false);
}
string a = null;
ASN1 asn = null;
int i = 0;
while (i < cs.AuthenticatedAttributes.Count)
{
ASN1 asn2 = (ASN1)cs.AuthenticatedAttributes[i];
string text = ASN1Convert.ToOid(asn2[0]);
string text2 = text;
switch (text2)
{
case "1.2.840.113549.1.9.3":
a = ASN1Convert.ToOid(asn2[1][0]);
break;
case "1.2.840.113549.1.9.4":
asn = asn2[1][0];
break;
case "1.2.840.113549.1.9.5":
this.timestamp = ASN1Convert.ToDateTime(asn2[1][0]);
break;
}
IL_FC:
i++;
continue;
goto IL_FC;
}
if (a != "1.2.840.113549.1.7.1")
{
return(false);
}
if (asn == null)
{
return(false);
}
string hashName = null;
int length = asn.Length;
if (length != 16)
{
if (length == 20)
{
hashName = "SHA1";
}
}
else
{
hashName = "MD5";
}
HashAlgorithm hashAlgorithm = HashAlgorithm.Create(hashName);
if (!asn.CompareValue(hashAlgorithm.ComputeHash(signature)))
{
return(false);
}
byte[] signature2 = cs.Signature;
ASN1 asn3 = new ASN1(49);
foreach (object obj in cs.AuthenticatedAttributes)
{
ASN1 asn4 = (ASN1)obj;
asn3.Add(asn4);
}
byte[] hashValue = hashAlgorithm.ComputeHash(asn3.GetBytes());
string issuerName = cs.IssuerName;
byte[] serialNumber = cs.SerialNumber;
foreach (X509Certificate x509Certificate in this.coll)
{
if (this.CompareIssuerSerial(issuerName, serialNumber, x509Certificate) && x509Certificate.PublicKey.Length > signature2.Length)
{
RSACryptoServiceProvider rsacryptoServiceProvider = (RSACryptoServiceProvider)x509Certificate.RSA;
RSAManaged rsamanaged = new RSAManaged();
rsamanaged.ImportParameters(rsacryptoServiceProvider.ExportParameters(false));
if (PKCS1.Verify_v15(rsamanaged, hashAlgorithm, hashValue, signature2, true))
{
this.timestampChain.LoadCertificates(this.coll);
return(this.timestampChain.Build(x509Certificate));
}
}
}
return(false);
}
private bool VerifyCounterSignature(PKCS7.SignerInfo cs, byte[] signature)
{
// SEQUENCE {
// INTEGER 1
if (cs.Version > 1)
{
return(false);
}
// SEQUENCE {
// SEQUENCE {
string contentType = null;
ASN1 messageDigest = null;
for (int i = 0; i < cs.AuthenticatedAttributes.Count; i++)
{
// SEQUENCE {
// OBJECT IDENTIFIER
ASN1 attr = (ASN1)cs.AuthenticatedAttributes [i];
string oid = ASN1Convert.ToOid(attr[0]);
switch (oid)
{
case "1.2.840.113549.1.9.3":
// contentType
contentType = ASN1Convert.ToOid(attr[1][0]);
break;
case "1.2.840.113549.1.9.4":
// messageDigest
messageDigest = attr[1][0];
break;
case "1.2.840.113549.1.9.5":
// SEQUENCE {
// OBJECT IDENTIFIER
// signingTime (1 2 840 113549 1 9 5)
// SET {
// UTCTime '030124013651Z'
// }
// }
timestamp = ASN1Convert.ToDateTime(attr[1][0]);
break;
default:
break;
}
}
if (contentType != PKCS7.Oid.data)
{
return(false);
}
// verify message digest
if (messageDigest == null)
{
return(false);
}
// TODO: must be read from the ASN.1 structure
string hashName = null;
switch (messageDigest.Length)
{
case 16:
hashName = "MD5";
break;
case 20:
hashName = "SHA1";
break;
}
HashAlgorithm ha = HashAlgorithm.Create(hashName);
if (!messageDigest.CompareValue(ha.ComputeHash(signature)))
{
return(false);
}
// verify signature
byte[] counterSignature = cs.Signature;
// change to SET OF (not [0]) as per PKCS #7 1.5
ASN1 aa = new ASN1(0x31);
foreach (ASN1 a in cs.AuthenticatedAttributes)
{
aa.Add(a);
}
byte[] p7hash = ha.ComputeHash(aa.GetBytes());
// we need to try all certificates
string issuer = cs.IssuerName;
byte[] serial = cs.SerialNumber;
foreach (X509Certificate x509 in coll)
{
if (CompareIssuerSerial(issuer, serial, x509))
{
if (x509.PublicKey.Length > counterSignature.Length)
{
RSACryptoServiceProvider rsa = (RSACryptoServiceProvider)x509.RSA;
// we need to HACK around bad (PKCS#1 1.5) signatures made by Verisign Timestamp Service
// and this means copying stuff into our own RSAManaged to get the required flexibility
RSAManaged rsam = new RSAManaged();
rsam.ImportParameters(rsa.ExportParameters(false));
if (PKCS1.Verify_v15(rsam, ha, p7hash, counterSignature, true))
{
timestampChain.LoadCertificates(coll);
return(timestampChain.Build(x509));
}
}
}
}
// no certificate can verify this signature!
return(false);
}
private bool VerifyCounterSignature(PKCS7.SignerInfo cs, byte[] signature)
{
if (cs.Version == 1)
{
string str = null;
ASN1 asn = null;
for (int i = 0; i < cs.AuthenticatedAttributes.Count; i++)
{
ASN1 asn2 = (ASN1)cs.AuthenticatedAttributes[i];
string key = ASN1Convert.ToOid(asn2[0]);
if (key != null)
{
if (__f__switch_map3 == null)
{
Dictionary <string, int> dictionary = new Dictionary <string, int>(3)
{
{
"1.2.840.113549.1.9.3",
0
},
{
"1.2.840.113549.1.9.4",
1
},
{
"1.2.840.113549.1.9.5",
2
}
};
__f__switch_map3 = dictionary;
}
if (__f__switch_map3.TryGetValue(key, out int num2))
{
switch (num2)
{
case 0:
str = ASN1Convert.ToOid(asn2[1][0]);
break;
case 1:
asn = asn2[1][0];
break;
case 2:
this.timestamp = ASN1Convert.ToDateTime(asn2[1][0]);
break;
}
}
}
}
if (str != "1.2.840.113549.1.7.1")
{
return(false);
}
if (asn == null)
{
return(false);
}
string hashName = null;
switch (asn.Length)
{
case 0x10:
hashName = "MD5";
break;
case 20:
hashName = "SHA1";
break;
}
HashAlgorithm hash = HashAlgorithm.Create(hashName);
if (asn.CompareValue(hash.ComputeHash(signature)))
{
byte[] buffer = cs.Signature;
ASN1 asn3 = new ASN1(0x31);
IEnumerator enumerator = cs.AuthenticatedAttributes.GetEnumerator();
try
{
while (enumerator.MoveNext())
{
ASN1 current = (ASN1)enumerator.Current;
asn3.Add(current);
}
}
finally
{
if (enumerator is IDisposable disposable)
{
disposable.Dispose();
}
}
byte[] hashValue = hash.ComputeHash(asn3.GetBytes());
string issuerName = cs.IssuerName;
byte[] serialNumber = cs.SerialNumber;
X509CertificateCollection.X509CertificateEnumerator enumerator2 = this.coll.GetEnumerator();
try
{
while (enumerator2.MoveNext())
{
X509Certificate current = enumerator2.Current;
if (this.CompareIssuerSerial(issuerName, serialNumber, current) &&
(current.PublicKey.Length > buffer.Length))
{
RSACryptoServiceProvider rSA = (RSACryptoServiceProvider)current.RSA;
RSAManaged rsa = new RSAManaged();
rsa.ImportParameters(rSA.ExportParameters(false));
if (PKCS1.Verify_v15(rsa, hash, hashValue, buffer, true))
{
this.timestampChain.LoadCertificates(this.coll);
return(this.timestampChain.Build(current));
}
}
}
}
finally
{
if (enumerator2 is IDisposable disposable2)
{
disposable2.Dispose();
}
}
}
}
return(false);
}
/// <summary>
/// Handles incoming packet.
/// </summary>
/// <param name="packet">Incoming packet.</param>
protected override void Handle(Packet packet)
{
Logger.WriteLine(Source.OuterNetwork, "Received: {0}", packet.ToString());
if (!CacheServiceConnection.Active) // validate if login service is active
{
Send(LoginFailed.ToPacket(UserAuthenticationResponseType.ServerMaintenance));
UserConnectionsListener.CloseActiveConnection(this);
return;
}
if (QueuedRequestsPool.HasRequest(this, true)) // validate if user is awaiting response from cache service
{
return;
}
switch (packet.FirstOpcode)
{
case 0x07:
{
Send(ResponseAuthGameGuard.Static);
return;
}
case 0x00:
{
m_RSADecryptor = new RSAManaged();
m_RSADecryptor.ImportParameters(UserConnectionsListener.PrivateKey);
// get login and password
unsafe
{
byte[] bytes = new byte[0x80];
fixed(byte *buf = bytes, src = packet.GetBuffer())
L2Buffer.Copy(src, 0x01, buf, 0x00, 0x80);
fixed(byte *buf = m_RSADecryptor.DecryptValue(bytes))
{
L2Buffer.GetTrimmedString(buf, 0x03, ref Login, 0x0e);
L2Buffer.GetTrimmedString(buf, 0x11, ref Password, 0x10);
}
}
// validate user login
if (!Utils.IsValidUserLogin(Login))
{
Send(LoginFailed.ToPacket(UserAuthenticationResponseType.UserOrPasswordWrong));
return;
}
//Password = Utils.HashPassword(Password);
Session.AccountName = Login;
Logger.WriteLine(Session.ToString());
long requestId = long.MinValue;
// request cache to auth user
if (QueuedRequestsPool.Enqueue(this, ref requestId))
{
CacheServiceConnection.Send(new UserAuthenticationRequest(requestId, Login, Password, Session.ID).ToPacket());
}
else
{
Logger.WriteLine(Source.InnerNetwork, "Failed to send UserAuthenticationRequest to cache service, request was not enqueued by QueuedRequestsPool ?...");
Send(LoginFailed.ToPacket(UserAuthenticationResponseType.SystemError));
UserConnectionsListener.CloseActiveConnection(this);
}
return;
}
case 0x05:
{
int login1 = packet.ReadInt();
int login2 = packet.ReadInt();
if (login1 != Session.Login1 || login2 != Session.Login2)
{
Logger.WriteLine(Source.OuterNetwork, "Invalid UserSession data: {0}. BAN!", Session.ToString());
CacheServiceConnection.Send(new UnCacheUser(Session.ID).ToPacket());
UserConnectionsListener.CloseActiveConnection(this);
}
else
{
long requestID = long.MinValue;
if (QueuedRequestsPool.Enqueue(this, ref requestID))
{
CacheServiceConnection.Send(new WorldsListRequest(requestID).ToPacket());
}
else
{
Logger.WriteLine(Source.InnerNetwork, "Failed to send WorldsListRequest to cache service, request was not enqueued by QueuedRequestsPool ?...");
UserConnectionsListener.CloseActiveConnection(this);
}
}
return;
}
case 0x02:
{
// skip not needed data
packet.MoveOffset(8);
long requestID = long.MinValue;
if (QueuedRequestsPool.Enqueue(this, ref requestID))
{
CacheServiceConnection.Send(new JoinWorldRequest(requestID, Session.ID, packet.ReadByte()).ToPacket());
}
else
{
Logger.WriteLine(Source.InnerNetwork, "Failed to send JionWorldRequest to cache service, request was not enqueued by QueuedRequestsPool ?...");
UserConnectionsListener.CloseActiveConnection(this);
}
return;
}
}
Logger.WriteLine(Source.OuterNetwork, "Unknown packet received: {0}", packet.ToString());
UserConnectionsListener.CloseActiveConnection(this);
}
public override void ImportParameters(RSAParameters parameters)
{
rsa.ImportParameters(parameters);
}
private bool VerifyCounterSignature(PKCS7.SignerInfo cs, byte[] signature)
{
if (cs.Version != 1)
{
return(false);
}
string a = null;
ASN1 aSN = null;
for (int i = 0; i < cs.AuthenticatedAttributes.Count; i++)
{
ASN1 aSN2 = (ASN1)cs.AuthenticatedAttributes[i];
switch (ASN1Convert.ToOid(aSN2[0]))
{
case "1.2.840.113549.1.9.3":
a = ASN1Convert.ToOid(aSN2[1][0]);
break;
case "1.2.840.113549.1.9.4":
aSN = aSN2[1][0];
break;
case "1.2.840.113549.1.9.5":
timestamp = ASN1Convert.ToDateTime(aSN2[1][0]);
break;
}
}
if (a != "1.2.840.113549.1.7.1")
{
return(false);
}
if (aSN == null)
{
return(false);
}
string hashName = null;
switch (aSN.Length)
{
case 16:
hashName = "MD5";
break;
case 20:
hashName = "SHA1";
break;
}
HashAlgorithm hashAlgorithm = HashAlgorithm.Create(hashName);
if (!aSN.CompareValue(hashAlgorithm.ComputeHash(signature)))
{
return(false);
}
byte[] signature2 = cs.Signature;
ASN1 aSN3 = new ASN1(49);
foreach (ASN1 authenticatedAttribute in cs.AuthenticatedAttributes)
{
aSN3.Add(authenticatedAttribute);
}
byte[] hashValue = hashAlgorithm.ComputeHash(aSN3.GetBytes());
string issuerName = cs.IssuerName;
byte[] serialNumber = cs.SerialNumber;
foreach (X509Certificate item in coll)
{
if (CompareIssuerSerial(issuerName, serialNumber, item) && item.PublicKey.Length > signature2.Length)
{
RSACryptoServiceProvider rSACryptoServiceProvider = (RSACryptoServiceProvider)item.RSA;
RSAManaged rSAManaged = new RSAManaged();
rSAManaged.ImportParameters(rSACryptoServiceProvider.ExportParameters(includePrivateParameters: false));
if (PKCS1.Verify_v15(rSAManaged, hashAlgorithm, hashValue, signature2, tryNonStandardEncoding: true))
{
timestampChain.LoadCertificates(coll);
return(timestampChain.Build(item));
}
}
}
return(false);
}