internal static IFreeformEntity_Msg InitKeyExchangeEndG2H_SIM(this FreeformSecurityTableCollection secTables, IFreeformEntity_Msg request) { // store the partial key of the host FFTgt_B2B_Security_KeyExchange_PartialKey tgt = request.EntityPrimaryTarget as FFTgt_B2B_Security_KeyExchange_PartialKey; SECURITY_KEY_INDEX keyIndex = FreeformEncryptionHelper.GetSecurityKeyIndex(request); byte[] gmuPartialKey = secTables.CreatePartialKeyGmu(keyIndex); secTables.StoreOtherPartialKeyGmu(keyIndex, tgt.PartialKey); secTables.CreateCommonKey(keyIndex); // send the partial key of the gmu IFreeformEntity_Msg response = request.CopyTo(FF_FlowDirection.G2H, new FFCreateEntityRequest_G2H_ResponseRequired() { MessageType = FF_AppId_G2H_MessageTypes.FreeForm, Command = FF_AppId_G2H_Commands.ResponseRequest, SkipTransactionId = true, }); FFTgt_B2B_Security tgt2 = new FFTgt_B2B_Security() { SecurityData = new FFTgt_B2B_Security_KeyExchange_End() { PartialKey = gmuPartialKey, } }; response.AddTarget(tgt2); return(response); }
internal static IFreeformEntity_Msg InitKeyExchangePartialKeyH2G_GMU(this FreeformSecurityTableCollection secTables, IFreeformEntity_Msg request) { SECURITY_KEY_INDEX keyIndex = FreeformEncryptionHelper.GetSecurityKeyIndex(request); byte[] hostPartialKey = secTables.CreatePartialKeyHost(keyIndex); IFreeformEntity_Msg message = request.CopyTo(FF_FlowDirection.H2G, new FFCreateEntityRequest_H2G_ResponseRequired() { PollCode = FF_AppId_H2G_PollCodes.FreeformResponse, }); InitSecurityData(message, new FFTgt_B2B_Security_KeyExchange_PartialKey() { PartialKey = hostPartialKey, }); return(message); }
internal static IFreeformEntity_Msg InitKeyExchangeStatusH2G_GMU(this FreeformSecurityTableCollection secTables, IFreeformEntity_Msg request) { // store the partial key of the gmu FFTgt_B2B_Security_KeyExchange_End tgt = request.EntityPrimaryTarget as FFTgt_B2B_Security_KeyExchange_End; SECURITY_KEY_INDEX keyIndex = FreeformEncryptionHelper.GetSecurityKeyIndex(request); secTables.StoreOtherPartialKeyHost(keyIndex, tgt.PartialKey); secTables.CreateCommonKey(keyIndex); IFreeformEntity_Msg message = request.CopyTo(FF_FlowDirection.H2G, new FFCreateEntityRequest_H2G_ResponseRequired() { PollCode = FF_AppId_H2G_PollCodes.FreeformNoResponse, }); InitSecurityData(message, new FFTgt_B2B_Security_KeyExchange_Status() { Status = (request.EntityPrimaryTarget is FFTgt_B2B_Security_PartialKey ? FF_AppId_ResponseStatus_Types.Success : FF_AppId_ResponseStatus_Types.Fail), }); return(message); }
public byte[] Decrypt(IFreeformEntity_Msg message, byte[] buffer) { using (ILogMethod method = Log.LogMethod(this.DYN_MODULE_NAME, "Decrypt")) { List <byte> result = new List <byte>(); try { if (message == null || buffer == null || buffer.Length == 0) { return(new byte[0]); } FreeformSecurityTableCollection securityTables = FFMsgHandlerFactory.Current.GetSecurityTables(message.IpAddress); SECURITY_KEY_INDEX securityKey = message.GetSecurityKeyIndex(); ENCRYP_TARGETS encryptionType = (ENCRYP_TARGETS)buffer[0]; FF_FlowInitiation flowInitiation = message.FlowInitiation; switch (encryptionType) { case ENCRYP_TARGETS.ET_SdsEncryption: { byte[] bufferCopy = buffer.CopyToBuffer(1, buffer.Length - 1); FreeformEncryptionHelper.Decrypt(securityTables, flowInitiation, securityKey, ref bufferCopy); result.AddRange(bufferCopy); } break; case ENCRYP_TARGETS.ET_SdsAuthentication: case ENCRYP_TARGETS.ET_EFTStyleEncryption: { byte authenticationByteReceived = buffer[1]; byte[] bufferCopy = buffer.CopyToBuffer(2, buffer.Length - 2); FreeformEncryptionHelper.Decrypt(securityTables, flowInitiation, securityKey, ref bufferCopy); byte authenticationByteGenerated = FreeformEncryptionHelper.MakeAuthenticationByte(bufferCopy); if (encryptionType == ENCRYP_TARGETS.ET_EFTStyleEncryption) { byte[] temp = new byte[] { authenticationByteGenerated }; FreeformEncryptionHelper.Decrypt(securityTables, flowInitiation, securityKey, ref temp); authenticationByteGenerated = temp[0]; } if (authenticationByteReceived == authenticationByteGenerated) { result.AddRange(bufferCopy); } } break; default: break; } } catch (Exception ex) { method.Exception(ex); } return(result.ToArray()); } }
public List <byte> Encrypt(IFreeformEntity_Msg message, IFreeformEntity_MsgTgt target, List <byte> buffer) { using (ILogMethod method = Log.LogMethod(this.DYN_MODULE_NAME, "Encrypt")) { List <byte> result = new List <byte>(); try { if (message == null || buffer == null || buffer.Count == 0) { return(result); } byte[] source = buffer.ToArray(); FreeformSecurityTableCollection securityTables = FFMsgHandlerFactory.Current.GetSecurityTables(message.IpAddress); SECURITY_KEY_INDEX securityKey = message.GetSecurityKeyIndex(); FF_AppId_Encryption_Types encryptionType = target.EncryptionType; if (target.PrimaryTarget != null && target.PrimaryTarget.EncryptionType != FF_AppId_Encryption_Types.None) { encryptionType = target.PrimaryTarget.EncryptionType; } FF_FlowInitiation flowInitiation = message.FlowInitiation; switch (encryptionType) { case FF_AppId_Encryption_Types.Standard: { FreeformEncryptionHelper.Encrypt(securityTables, flowInitiation, securityKey, ref source); result.Add((byte)ENCRYP_TARGETS.ET_SdsEncryption); result.AddRange(source); } break; case FF_AppId_Encryption_Types.AuthByteClearData: case FF_AppId_Encryption_Types.AuthByteEncryptedData: { byte[] authenticationByte = new byte[] { FreeformEncryptionHelper.MakeAuthenticationByte(source) }; if (encryptionType == FF_AppId_Encryption_Types.AuthByteEncryptedData) { result.Add((byte)ENCRYP_TARGETS.ET_EFTStyleEncryption); FreeformEncryptionHelper.Encrypt(securityTables, flowInitiation, securityKey, ref authenticationByte); } else { result.Add((byte)ENCRYP_TARGETS.ET_SdsAuthentication); } FreeformEncryptionHelper.Encrypt(securityTables, flowInitiation, securityKey, ref source); result.AddRange(authenticationByte); result.AddRange(source); } break; default: result = buffer; break; } } catch (Exception ex) { method.Exception(ex); } return(result); } }