def read_nv_index()

in cvm-attestation/tpm_wrapper.py [0:0]

• 17 lines of code
• 2 McCabe index (conditional complexity)

  def read_nv_index(self, index):
    tpm = Tpm()
    tpm.connect()

    handle = TPM_HANDLE(int(index, 16))
    response = tpm.NV_ReadPublic(handle)
    auth = TPM_HANDLE(TPM_RH.OWNER)

    total_bytes_to_read = response.nvPublic.dataSize
    bytes_read = 0
    buffer_size = 1024

    # store the hcl report
    hcl_report = b''

    while bytes_read < total_bytes_to_read:
      # Calculate how many bytes to read in this iteration
      bytes_to_read = min(buffer_size, total_bytes_to_read - bytes_read)

      # Read the data into the buffer
      data = tpm.NV_Read(auth, handle , bytes_to_read, bytes_read)
      hcl_report = hcl_report + data

      # Update the total bytes read
      bytes_read += bytes_to_read

    tpm.close()

    return hcl_report