RE: How RPi3 could decrypt Mesh packets

MartinBL — Thu, 31 Aug 2017 11:08:00 GMT

Hi,

To sniff packets using the PyACI-interface you need to add relevant cryptographic keys and addresses. In the light control example you will find these in the folder "examples/light_control/client/include/provisioner.h":

#define APPKEY {0x5f, 0x11, 0x6e, 0x6f, 0x72, 0x64, 0x69, 0x63, 0x5f, 0x5f, 0x73, 0x65, 0x6d, 0x69, 0x5f, 0x5f}
#define NETKEY {0x5f, 0x5f, 0x6e, 0x6f, 0x72, 0x64, 0x69, 0x63, 0x5f, 0x5f, 0x73, 0x65, 0x6d, 0x69, 0x5f, 0x5f}
#define APPKEY_INDEX (0)
#define NETKEY_INDEX (0)

#define GROUP_ADDRESS (0xCAFE)
#define PROVISIONER_ADDRESS  (0x0001)
#define UNPROV_START_ADDRESS (0x0010)

To use the build in BLE chip to sniff mesh activity you will have to implement the decryption yourself. It is unfortunately not possible to use mesh without encryption.