Obtaining key generation parameters on MED1775

[MasterCodeIT]

Would you mind displaying "Obtaining key generation parameters" on this DLL?

I found the security access levels (5, 9, 0B) but I can not find the cryptographic constants.

I can not seem to find it.

[jglim]

In brief, looking at MED1775_MED1775_12_42_00.dll as an example:

• From the exports, start from GenerateKeyExOpt. There should be paths for 3 access levels: 5, 9 and 11.
• For each case, there will usually be an alloc, parameter initialization routine, and the actual key generation routine.
• Enter the parameter initialization routine. At this point, the security provider should be known (5,11: PowertrainSecurityAlgo, 9: DaimlerStandardSecurityAlgo)
• Look further into the child routines in parameter init; there will be a shared routine where all parameters are initialized for 5, 9 and 11. Key generation parameters are found there

As an example for level 9:

From that parameter, the definition can be created:

  {
    "EcuName": "MED1775",
    "Aliases": [],
    "AccessLevel": 9,
    "SeedLength": 8,
    "KeyLength": 4,
    "Provider": "DaimlerStandardSecurityAlgo",
    "Origin": "MED1775_MED1775_12_42_00",
    "Parameters": [
      {
        "Key": "K",
        "Value": "35A9C476",
        "DataType": "ByteArray"
      }
    ]
  }

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As mentioned in jglim/CaesarSuite#29, I would appreciate if non-issues are created in its correct place as discussions here instead; I may not be able to reply to further non-issues.