/// <summary>
/// SerializeCredentials method implementation
/// </summary>
public string SerializeCredentials(MFAUserCredential creds, string username)
{
MemoryStream stream = new MemoryStream();
BinaryWriter writer = new BinaryWriter(stream);
writer.Write(creds.Descriptor.Id.Length);
writer.Write(creds.Descriptor.Id, 0, creds.Descriptor.Id.Length);
writer.Write(creds.UserId.Length);
writer.Write(creds.UserId, 0, creds.UserId.Length);
writer.Write(creds.PublicKey.Length);
writer.Write(creds.PublicKey, 0, creds.PublicKey.Length);
writer.Write(creds.UserHandle.Length);
writer.Write(creds.UserHandle, 0, creds.UserHandle.Length);
writer.Write(creds.SignatureCounter);
writer.Write(creds.CredType);
writer.Write(creds.RegDate.ToBinary());
writer.Write(creds.AaGuid.ToByteArray());
writer.Write((byte)creds.Descriptor.Type.Value);
if (creds.Descriptor.Transports != null)
{
writer.Write(creds.Descriptor.Transports.Length);
foreach (MFAAuthenticatorTransport tr in creds.Descriptor.Transports)
{
writer.Write((byte)tr);
}
}
else
{
writer.Write(0);
}
string Descriptor = HexaEncoding.GetHexStringFromByteArray(stream.ToArray());
string distinguishedName = string.Empty;
if (_host != null)
{
distinguishedName = GetMFAdistinguishedName(username);
}
else
{
distinguishedName = username;
}
distinguishedName = CheckSumEncoding.CheckSumAsString(distinguishedName);
if (string.IsNullOrEmpty(creds.NickName))
{
creds.NickName = "None";
}
return(string.Format("B:{0}:{1}:{2}:{3}", (Descriptor.Length).ToString(), Descriptor, distinguishedName, creds.NickName));
}
/// <summary>
/// DeserializeCredentials method implementation
/// </summary>
internal MFAUserCredential DeserializeCredentials(string descriptor, string username)
{
string distinguishedName = string.Empty;
if (_host != null)
{
distinguishedName = GetMFAdistinguishedName(username);
}
else
{
distinguishedName = username;
}
string[] values = descriptor.Split(':');
string value = values[2];
if (!distinguishedName.ToLower().Equals(values[3].ToString().ToLower()))
{
throw new SecurityException("Invalid Key for user " + username);
}
byte[] bytes = HexaEncoding.GetByteArrayFromHexString(value);
MemoryStream stream = new MemoryStream(bytes);
BinaryReader reader = new BinaryReader(stream);
int test = reader.ReadInt32();
byte[] _DescId = reader.ReadBytes(test);
byte[] _Userid = reader.ReadBytes(reader.ReadInt32());
byte[] _PublicKey = reader.ReadBytes(reader.ReadInt32());
byte[] _UserHandle = reader.ReadBytes(reader.ReadInt32());
uint _SignatureCounter = reader.ReadUInt32();
string _CredType = reader.ReadString();
DateTime _RegDate = DateTime.FromBinary(reader.ReadInt64());
Guid _AaGuid = new Guid(reader.ReadBytes(16));
MFAPublicKeyCredentialType?_DescType = (MFAPublicKeyCredentialType)reader.ReadByte();
int DescTransportCount = reader.ReadInt32();
MFAAuthenticatorTransport[] _DescTransport = null;
if (DescTransportCount > 0)
{
_DescTransport = new MFAAuthenticatorTransport[DescTransportCount];
for (int i = 0; i < DescTransportCount; i++)
{
_DescTransport[i] = (MFAAuthenticatorTransport)reader.ReadByte();
}
}
var creds = new MFAUserCredential()
{
UserId = _Userid,
PublicKey = _PublicKey,
UserHandle = _UserHandle,
SignatureCounter = _SignatureCounter,
CredType = _CredType,
RegDate = _RegDate,
AaGuid = _AaGuid,
};
creds.Descriptor = new MFAPublicKeyCredentialDescriptor(_DescId)
{
Type = _DescType,
Transports = _DescTransport
};
return(creds);
}
