> ## Documentation Index
> Fetch the complete documentation index at: https://notevil.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# CAPLfunctionSCCCreateCMSetKeyReq

[Open topic with navigation](../../../../../CANoeDEFamily.htm#Topics/CAPLFunctions/SmartCharging/Functions/CAPLfunctionSCCCreateCMSetKeyReq.md)

**CAPL Functions** » [Smart Charging](../CAPLFunctionsSmartChargingOverview.md) » [SCC Modeling Libraries (Simulation Setup)](../CAPLFunctionsSmartChargingOverview.md#BMNodeayerDLL) » [SLAC Test Functions](../CAPLFunctionsSmartChargingOverview.md#SLACtest) » [Shared Functions](../CAPLFunctionsSmartChargingOverview.md#SLACtest) » SCC\_CreateCM\_Set\_Key\_Req

# SCC\_CreateCM\_Set\_Key\_Req

[Valid for](../../../Shared/FeatureAvailability.md):  CANoe DE •  CANoe4SW DE

## Function Syntax

```c theme={null}
void SCC_CreateCM_Set_Key_Req ( byte SourceMac[], byte TargetMac[], byte NID[], byte NMK[] )
```

## Description

Creates a **CM\_Set\_Key.Req** message for sending.

## Parameters

* **SourceMac**: Source address of the Ethernet packet.
* **TargetMac**: Destination address of the Ethernet packet.
* **NID**: Network ID given by the CCo (EVSE) (7 byte).
* **NMK**: NMK to be set (16 byte).

### Additional Parameters

1. **KeyType** (dword):
   * 0x00 = DAK (AES-128)
   * 0x01 = NMK (AES-128)
   * 0x02 = NEK (AES-128)
   * 0x03 = TEK (AES-128)
   * 0x04 = Hash Key (Random-3072)
   * 0x05 = Nonce Only (no key)
   * 0x06-0xFF = Reserved

2. **MyNonce** (byte\[]): 4 byte random number.

3. **YourNonce** (byte\[]): Last received nonce (4 byte).

4. **PID** (dword): Protocol ID.

5. **PRN** (byte\[]): Protocol Run Number (2 byte).

6. **PMN** (dword): Protocol Message Number.

7. **CCoCapability** (dword): STA’s CCo Capability.

8. **NewEKS** (dword): PEKS or EKS.

## Return Values

—

## Example

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