certs error in sb6190 but not in sb6141

[christianrodher]

the problem lies in liball_docsis.so.. This stupid arris modem just accepts private keys of 688 bytes... moto private keys are 672 or so. Anyone is an expert in C that can reverse the entire liball_docsis.so?

Come on lets work to make sb6190 better... Im starring to learn C, but it will take me years to be proficient enough to decompile this.

Code:

*(_WORD *)(v1 + 3364) = v4;
  close(v3);
  sprintf(&s, "%s/%s", &v43, "cm_key_prv.bin");
  v6 = open(&s, 0);
  v7 = v6;
  if ( v6 == -1 )
  {
    logger_build_send_log_msg(&unk_B6474, 0, "Failed to open CM certificate file!\n", 0);
    return v7;
  }
  v8 = read(v6, &buf, 0x2B0u);
  if ( v8 == 688 )
  {
    v40 = 0;
    v35 = 0;
    ptr = 0;
    v28 = 0;
    v36 = 0;
    v37 = 0;
    v38 = 0;
    v39 = 0;
    v31 = 0;
    v32 = 0;
    v33 = 0;
    v34 = 0;
    printf("\n%s: **** privateKey retrieved from NVRAM (len: %d):\n", &unk_B6480, 688);
    if ( ProdDb_GetLanMacAddr(v29) )