823 lines
29 KiB
Python
Executable file
823 lines
29 KiB
Python
Executable file
#!/usr/bin/env python
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#
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# esp-idf NVS partition generation tool. Tool helps in generating NVS-compatible
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# partition binary, with key-value pair entries provided via a CSV file.
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#
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# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from __future__ import division, print_function
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from builtins import int, range, bytes
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from io import open
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import sys
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import argparse
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import binascii
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import random
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import struct
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import os
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import array
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import csv
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import zlib
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import codecs
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from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
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from cryptography.hazmat.backends import default_backend
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VERSION1_PRINT = "v1 - Multipage Blob Support Disabled"
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VERSION2_PRINT = "v2 - Multipage Blob Support Enabled"
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""" Class for standard NVS page structure """
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class Page(object):
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PAGE_PARAMS = {
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"max_size": 4096,
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"max_old_blob_size": 1984,
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"max_new_blob_size": 4000,
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"max_entries": 126
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}
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# Item type codes
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U8 = 0x01
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I8 = 0x11
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U16 = 0x02
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I16 = 0x12
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U32 = 0x04
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I32 = 0x14
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SZ = 0x21
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BLOB = 0x41
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BLOB_DATA = 0x42
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BLOB_IDX = 0x48
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# Few Page constants
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HEADER_SIZE = 32
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BITMAPARRAY_OFFSET = 32
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BITMAPARRAY_SIZE_IN_BYTES = 32
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FIRST_ENTRY_OFFSET = 64
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SINGLE_ENTRY_SIZE = 32
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CHUNK_ANY = 0xFF
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ACTIVE = 0xFFFFFFFE
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FULL = 0xFFFFFFFC
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VERSION1 = 0xFF
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VERSION2 = 0xFE
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def __init__(self, page_num, is_rsrv_page=False):
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self.entry_num = 0
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self.is_encrypt = False
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self.encr_key = None
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self.bitmap_array = array.array('B')
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self.version = Page.VERSION2
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self.page_buf = bytearray(b'\xff') * Page.PAGE_PARAMS["max_size"]
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if not is_rsrv_page:
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self.bitmap_array = self.create_bitmap_array()
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self.set_header(page_num)
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def set_header(self, page_num):
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global page_header
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# set page state to active
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page_header = bytearray(b'\xff') * 32
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page_state_active_seq = Page.ACTIVE
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struct.pack_into('<I', page_header, 0, page_state_active_seq)
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# set page sequence number
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struct.pack_into('<I', page_header, 4, page_num)
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# set version
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if version == Page.VERSION2:
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page_header[8] = Page.VERSION2
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elif version == Page.VERSION1:
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page_header[8] = Page.VERSION1
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# set header's CRC
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crc_data = bytes(page_header[4:28])
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crc = zlib.crc32(crc_data, 0xFFFFFFFF)
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struct.pack_into('<I', page_header, 28, crc & 0xFFFFFFFF)
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self.page_buf[0:len(page_header)] = page_header
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def create_bitmap_array(self):
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bitarray = array.array('B')
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charsize = 32 # bitmaparray has 256 bits, hence 32 bytes
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fill = 255 # Fill all 8 bits with 1's
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bitarray.extend((fill,) * charsize)
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return bitarray
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def write_bitmaparray(self):
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bitnum = self.entry_num * 2
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byte_idx = bitnum // 8 # Find byte index in the array
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bit_offset = bitnum & 7 # Find bit offset in given byte index
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mask = ~(1 << bit_offset)
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self.bitmap_array[byte_idx] &= mask
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start_idx = Page.BITMAPARRAY_OFFSET
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end_idx = Page.BITMAPARRAY_OFFSET + Page.BITMAPARRAY_SIZE_IN_BYTES
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self.page_buf[start_idx:end_idx] = self.bitmap_array
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def encrypt_entry(self, data_arr, tweak_arr, encr_key):
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# Encrypt 32 bytes of data using AES-XTS encryption
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backend = default_backend()
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plain_text = codecs.decode(data_arr, 'hex')
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tweak = codecs.decode(tweak_arr, 'hex')
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cipher = Cipher(algorithms.AES(encr_key), modes.XTS(tweak), backend=backend)
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encryptor = cipher.encryptor()
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encrypted_data = encryptor.update(plain_text)
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return encrypted_data
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def reverse_hexbytes(self, addr_tmp):
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addr = []
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reversed_bytes = ""
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for i in range(0, len(addr_tmp), 2):
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addr.append(addr_tmp[i:i + 2])
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reversed_bytes = "".join(reversed(addr))
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return reversed_bytes
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def encrypt_data(self, data_input, no_of_entries, nvs_obj):
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# Set values needed for encryption and encrypt data byte wise
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encr_data_to_write = bytearray()
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data_len_needed = 64 # in hex
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tweak_len_needed = 32 # in hex
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init_tweak_val = '0'
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init_data_val = 'f'
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tweak_tmp = ''
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encr_key_input = None
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# Extract encryption key and tweak key from given key input
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if len(self.encr_key) == key_len_needed:
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encr_key_input = self.encr_key
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else:
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encr_key_input = codecs.decode(self.encr_key, 'hex')
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rel_addr = nvs_obj.page_num * Page.PAGE_PARAMS["max_size"] + Page.FIRST_ENTRY_OFFSET
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if not isinstance(data_input, bytearray):
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byte_arr = bytearray(b'\xff') * 32
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byte_arr[0:len(data_input)] = data_input
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data_input = byte_arr
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data_input = binascii.hexlify(data_input)
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entry_no = self.entry_num
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start_idx = 0
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end_idx = start_idx + 64
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for _ in range(0, no_of_entries):
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# Set tweak value
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offset = entry_no * Page.SINGLE_ENTRY_SIZE
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addr = hex(rel_addr + offset)[2:]
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addr_len = len(addr)
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if addr_len > 2:
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if not addr_len % 2:
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addr_tmp = addr
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tweak_tmp = self.reverse_hexbytes(addr_tmp)
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tweak_val = tweak_tmp + (init_tweak_val * (tweak_len_needed - (len(tweak_tmp))))
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else:
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addr_tmp = init_tweak_val + addr
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tweak_tmp = self.reverse_hexbytes(addr_tmp)
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tweak_val = tweak_tmp + (init_tweak_val * (tweak_len_needed - (len(tweak_tmp))))
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else:
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tweak_val = addr + (init_tweak_val * (tweak_len_needed - len(addr)))
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# Encrypt data
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data_bytes = data_input[start_idx:end_idx]
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if type(data_bytes) == bytes:
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data_bytes = data_bytes.decode()
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data_val = data_bytes + (init_data_val * (data_len_needed - len(data_bytes)))
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encr_data_ret = self.encrypt_entry(data_val, tweak_val, encr_key_input)
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encr_data_to_write = encr_data_to_write + encr_data_ret
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# Update values for encrypting next set of data bytes
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start_idx = end_idx
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end_idx = start_idx + 64
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entry_no += 1
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return encr_data_to_write
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def write_entry_to_buf(self, data, entrycount,nvs_obj):
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encr_data = bytearray()
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if self.is_encrypt:
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encr_data_ret = self.encrypt_data(data, entrycount,nvs_obj)
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encr_data[0:len(encr_data_ret)] = encr_data_ret
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data = encr_data
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data_offset = Page.FIRST_ENTRY_OFFSET + (Page.SINGLE_ENTRY_SIZE * self.entry_num)
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start_idx = data_offset
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end_idx = data_offset + len(data)
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self.page_buf[start_idx:end_idx] = data
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# Set bitmap array for entries in current page
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for i in range(0, entrycount):
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self.write_bitmaparray()
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self.entry_num += 1
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def set_crc_header(self, entry_struct):
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crc_data = bytearray(b'28')
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crc_data[0:4] = entry_struct[0:4]
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crc_data[4:28] = entry_struct[8:32]
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crc_data = bytes(crc_data)
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crc = zlib.crc32(crc_data, 0xFFFFFFFF)
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struct.pack_into('<I', entry_struct, 4, crc & 0xFFFFFFFF)
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return entry_struct
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def write_varlen_binary_data(self, entry_struct, ns_index, key, data, data_size, total_entry_count, encoding, nvs_obj):
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chunk_start = 0
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chunk_count = 0
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chunk_index = Page.CHUNK_ANY
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offset = 0
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remaining_size = data_size
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tailroom = None
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while True:
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chunk_size = 0
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# Get the size available in current page
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tailroom = (Page.PAGE_PARAMS["max_entries"] - self.entry_num - 1) * Page.SINGLE_ENTRY_SIZE
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assert tailroom >= 0, "Page overflow!!"
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# Split the binary data into two and store a chunk of available size onto curr page
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if tailroom < remaining_size:
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chunk_size = tailroom
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else:
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chunk_size = remaining_size
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remaining_size = remaining_size - chunk_size
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# Change type of data to BLOB_DATA
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entry_struct[1] = Page.BLOB_DATA
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# Calculate no. of entries data chunk will require
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datachunk_rounded_size = (chunk_size + 31) & ~31
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datachunk_entry_count = datachunk_rounded_size // 32
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datachunk_total_entry_count = datachunk_entry_count + 1 # +1 for the entry header
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# Set Span
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entry_struct[2] = datachunk_total_entry_count
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# Update the chunkIndex
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chunk_index = chunk_start + chunk_count
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entry_struct[3] = chunk_index
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# Set data chunk
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data_chunk = data[offset:offset + chunk_size]
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# Compute CRC of data chunk
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struct.pack_into('<H', entry_struct, 24, chunk_size)
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if type(data) != bytes:
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data_chunk = bytes(data_chunk, encoding='utf8')
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crc = zlib.crc32(data_chunk, 0xFFFFFFFF)
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struct.pack_into('<I', entry_struct, 28, crc & 0xFFFFFFFF)
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# compute crc of entry header
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entry_struct = self.set_crc_header(entry_struct)
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# write entry header
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self.write_entry_to_buf(entry_struct, 1,nvs_obj)
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# write actual data
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self.write_entry_to_buf(data_chunk, datachunk_entry_count,nvs_obj)
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chunk_count = chunk_count + 1
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if remaining_size or (tailroom - chunk_size) < Page.SINGLE_ENTRY_SIZE:
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if page_header[0:4] != Page.FULL:
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page_state_full_seq = Page.FULL
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struct.pack_into('<I', page_header, 0, page_state_full_seq)
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nvs_obj.create_new_page()
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self = nvs_obj.cur_page
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offset = offset + chunk_size
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# All chunks are stored, now store the index
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if not remaining_size:
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# Initialise data field to 0xff
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data_array = bytearray(b'\xff') * 8
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entry_struct[24:32] = data_array
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# change type of data to BLOB_IDX
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entry_struct[1] = Page.BLOB_IDX
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# Set Span
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entry_struct[2] = 1
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# Update the chunkIndex
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chunk_index = Page.CHUNK_ANY
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entry_struct[3] = chunk_index
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struct.pack_into('<I', entry_struct, 24, data_size)
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entry_struct[28] = chunk_count
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entry_struct[29] = chunk_start
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# compute crc of entry header
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entry_struct = self.set_crc_header(entry_struct)
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# write last entry
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self.write_entry_to_buf(entry_struct, 1,nvs_obj)
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break
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return entry_struct
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def write_single_page_entry(self, entry_struct, data, datalen, data_entry_count, nvs_obj):
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# compute CRC of data
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struct.pack_into('<H', entry_struct, 24, datalen)
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if type(data) != bytes:
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data = bytes(data, encoding='utf8')
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crc = zlib.crc32(data, 0xFFFFFFFF)
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struct.pack_into('<I', entry_struct, 28, crc & 0xFFFFFFFF)
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# compute crc of entry header
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entry_struct = self.set_crc_header(entry_struct)
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# write entry header
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self.write_entry_to_buf(entry_struct, 1, nvs_obj)
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# write actual data
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self.write_entry_to_buf(data, data_entry_count, nvs_obj)
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"""
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Low-level function to write variable length data into page buffer. Data should be formatted
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according to encoding specified.
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"""
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def write_varlen_data(self, key, data, encoding, ns_index,nvs_obj):
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# Set size of data
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datalen = len(data)
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if datalen > Page.PAGE_PARAMS["max_old_blob_size"]:
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if version == Page.VERSION1:
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raise InputError("Version %s\n%s: Size exceeds max allowed length." % (VERSION1_PRINT,key))
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else:
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if encoding == "string":
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raise InputError("Version %s\n%s: Size exceeds max allowed length." % (VERSION2_PRINT,key))
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# Calculate no. of entries data will require
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rounded_size = (datalen + 31) & ~31
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data_entry_count = rounded_size // 32
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total_entry_count = data_entry_count + 1 # +1 for the entry header
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# Check if page is already full and new page is needed to be created right away
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if self.entry_num >= Page.PAGE_PARAMS["max_entries"]:
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raise PageFullError()
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elif (self.entry_num + total_entry_count) >= Page.PAGE_PARAMS["max_entries"]:
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if not (version == Page.VERSION2 and encoding in ["hex2bin", "binary", "base64"]):
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raise PageFullError()
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# Entry header
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entry_struct = bytearray(b'\xff') * 32
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# Set Namespace Index
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entry_struct[0] = ns_index
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# Set Span
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if version == Page.VERSION2:
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if encoding == "string":
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entry_struct[2] = data_entry_count + 1
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# Set Chunk Index
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chunk_index = Page.CHUNK_ANY
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entry_struct[3] = chunk_index
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else:
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entry_struct[2] = data_entry_count + 1
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# set key
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key_array = b'\x00' * 16
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entry_struct[8:24] = key_array
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entry_struct[8:8 + len(key)] = key.encode()
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# set Type
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if encoding == "string":
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entry_struct[1] = Page.SZ
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elif encoding in ["hex2bin", "binary", "base64"]:
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entry_struct[1] = Page.BLOB
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if version == Page.VERSION2 and (encoding in ["hex2bin", "binary", "base64"]):
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entry_struct = self.write_varlen_binary_data(entry_struct,ns_index,key,data,
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datalen,total_entry_count, encoding, nvs_obj)
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else:
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self.write_single_page_entry(entry_struct, data, datalen, data_entry_count, nvs_obj)
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""" Low-level function to write data of primitive type into page buffer. """
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def write_primitive_data(self, key, data, encoding, ns_index,nvs_obj):
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# Check if entry exceeds max number of entries allowed per page
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if self.entry_num >= Page.PAGE_PARAMS["max_entries"]:
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raise PageFullError()
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entry_struct = bytearray(b'\xff') * 32
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entry_struct[0] = ns_index # namespace index
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entry_struct[2] = 0x01 # Span
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chunk_index = Page.CHUNK_ANY
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entry_struct[3] = chunk_index
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# write key
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key_array = b'\x00' * 16
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entry_struct[8:24] = key_array
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entry_struct[8:8 + len(key)] = key.encode()
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if encoding == "u8":
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entry_struct[1] = Page.U8
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struct.pack_into('<B', entry_struct, 24, data)
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elif encoding == "i8":
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entry_struct[1] = Page.I8
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struct.pack_into('<b', entry_struct, 24, data)
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elif encoding == "u16":
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entry_struct[1] = Page.U16
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struct.pack_into('<H', entry_struct, 24, data)
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elif encoding == "u32":
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entry_struct[1] = Page.U32
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struct.pack_into('<I', entry_struct, 24, data)
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elif encoding == "i32":
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entry_struct[1] = Page.I32
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struct.pack_into('<i', entry_struct, 24, data)
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# Compute CRC
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crc_data = bytearray(b'28')
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crc_data[0:4] = entry_struct[0:4]
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crc_data[4:28] = entry_struct[8:32]
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crc_data = bytes(crc_data)
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crc = zlib.crc32(crc_data, 0xFFFFFFFF)
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struct.pack_into('<I', entry_struct, 4, crc & 0xFFFFFFFF)
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# write to file
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self.write_entry_to_buf(entry_struct, 1,nvs_obj)
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""" Get page buffer data of a given page """
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def get_data(self):
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return self.page_buf
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"""
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NVS class encapsulates all NVS specific operations to create a binary with given key-value pairs.
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Binary can later be flashed onto device via a flashing utility.
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"""
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class NVS(object):
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def __init__(self, fout, input_size):
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self.size = input_size
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self.namespace_idx = 0
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self.page_num = -1
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self.pages = []
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self.cur_page = self.create_new_page()
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self.fout = fout
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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if exc_type is None and exc_value is None:
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# Create pages for remaining available size
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while True:
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try:
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self.create_new_page()
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except InsufficientSizeError:
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self.size = None
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# Creating the last reserved page
|
|
self.create_new_page(is_rsrv_page=True)
|
|
break
|
|
|
|
result = self.get_binary_data()
|
|
if version == Page.VERSION1:
|
|
print("Version: ", VERSION1_PRINT)
|
|
else:
|
|
print("Version: ", VERSION2_PRINT)
|
|
self.fout.write(result)
|
|
|
|
def create_new_page(self, is_rsrv_page=False):
|
|
# Update available size as each page is created
|
|
if self.size == 0:
|
|
raise InsufficientSizeError("Size parameter is is less than the size of data in csv.Please increase size.")
|
|
if not is_rsrv_page:
|
|
self.size = self.size - Page.PAGE_PARAMS["max_size"]
|
|
self.page_num += 1
|
|
new_page = Page(self.page_num, is_rsrv_page)
|
|
new_page.version = version
|
|
new_page.is_encrypt = is_encrypt_data
|
|
if new_page.is_encrypt:
|
|
new_page.encr_key = key_input
|
|
self.pages.append(new_page)
|
|
self.cur_page = new_page
|
|
return new_page
|
|
|
|
"""
|
|
Write namespace entry and subsequently increase namespace count so that all upcoming entries
|
|
will be mapped to a new namespace.
|
|
"""
|
|
def write_namespace(self, key):
|
|
self.namespace_idx += 1
|
|
try:
|
|
self.cur_page.write_primitive_data(key, self.namespace_idx, "u8", 0,self)
|
|
except PageFullError:
|
|
new_page = self.create_new_page()
|
|
new_page.write_primitive_data(key, self.namespace_idx, "u8", 0,self)
|
|
|
|
"""
|
|
Write key-value pair. Function accepts value in the form of ascii character and converts
|
|
it into appropriate format before calling Page class's functions to write entry into NVS format.
|
|
Function handles PageFullError and creates a new page and re-invokes the function on a new page.
|
|
We don't have to guard re-invocation with try-except since no entry can span multiple pages.
|
|
"""
|
|
def write_entry(self, key, value, encoding):
|
|
if encoding == "hex2bin":
|
|
if len(value) % 2 != 0:
|
|
raise InputError("%s: Invalid data length. Should be multiple of 2." % key)
|
|
value = binascii.a2b_hex(value)
|
|
|
|
if encoding == "base64":
|
|
value = binascii.a2b_base64(value)
|
|
|
|
if encoding == "string":
|
|
if type(value) == bytes:
|
|
value = value.decode()
|
|
value += '\0'
|
|
|
|
encoding = encoding.lower()
|
|
varlen_encodings = ["string", "binary", "hex2bin", "base64"]
|
|
primitive_encodings = ["u8", "i8", "u16", "u32", "i32"]
|
|
|
|
if encoding in varlen_encodings:
|
|
try:
|
|
self.cur_page.write_varlen_data(key, value, encoding, self.namespace_idx,self)
|
|
except PageFullError:
|
|
new_page = self.create_new_page()
|
|
new_page.write_varlen_data(key, value, encoding, self.namespace_idx,self)
|
|
elif encoding in primitive_encodings:
|
|
try:
|
|
self.cur_page.write_primitive_data(key, int(value), encoding, self.namespace_idx,self)
|
|
except PageFullError:
|
|
new_page = self.create_new_page()
|
|
new_page.write_primitive_data(key, int(value), encoding, self.namespace_idx,self)
|
|
else:
|
|
raise InputError("%s: Unsupported encoding" % encoding)
|
|
|
|
""" Return accumulated data of all pages """
|
|
def get_binary_data(self):
|
|
data = bytearray()
|
|
for page in self.pages:
|
|
data += page.get_data()
|
|
return data
|
|
|
|
|
|
class PageFullError(RuntimeError):
|
|
"""
|
|
Represents error when current page doesn't have sufficient entries left
|
|
to accommodate current request
|
|
"""
|
|
def __init__(self):
|
|
super(PageFullError, self).__init__()
|
|
|
|
|
|
class InputError(RuntimeError):
|
|
"""
|
|
Represents error on the input
|
|
"""
|
|
def __init__(self, e):
|
|
super(InputError, self).__init__(e)
|
|
|
|
|
|
class InsufficientSizeError(RuntimeError):
|
|
"""
|
|
Represents error when NVS Partition size given is insufficient
|
|
to accomodate the data in the given csv file
|
|
"""
|
|
def __init__(self, e):
|
|
super(InsufficientSizeError, self).__init__(e)
|
|
|
|
|
|
def nvs_open(result_obj, input_size):
|
|
""" Wrapper to create and NVS class object. This object can later be used to set key-value pairs
|
|
|
|
:param result_obj: File/Stream object to dump resultant binary. If data is to be dumped into memory, one way is to use BytesIO object
|
|
:param input_size: Size of Partition
|
|
:return: NVS class instance
|
|
"""
|
|
return NVS(result_obj, input_size)
|
|
|
|
|
|
def write_entry(nvs_instance, key, datatype, encoding, value):
|
|
""" Wrapper to set key-value pair in NVS format
|
|
|
|
:param nvs_instance: Instance of an NVS class returned by nvs_open()
|
|
:param key: Key of the data
|
|
:param datatype: Data type. Valid values are "file", "data" and "namespace"
|
|
:param encoding: Data encoding. Valid values are "u8", "i8", "u16", "u32", "i32", "string", "binary", "hex2bin" and "base64"
|
|
:param value: Data value in ascii encoded string format for "data" datatype and filepath for "file" datatype
|
|
:return: None
|
|
"""
|
|
|
|
if datatype == "file":
|
|
abs_file_path = value
|
|
if os.path.isabs(value) is False:
|
|
script_dir = os.path.dirname(__file__)
|
|
abs_file_path = os.path.join(script_dir, value)
|
|
|
|
with open(abs_file_path, 'rb') as f:
|
|
value = f.read()
|
|
|
|
if datatype == "namespace":
|
|
nvs_instance.write_namespace(key)
|
|
else:
|
|
nvs_instance.write_entry(key, value, encoding)
|
|
|
|
|
|
def nvs_close(nvs_instance):
|
|
""" Wrapper to finish writing to NVS and write data to file/stream object provided to nvs_open method
|
|
|
|
:param nvs_instance: Instance of NVS class returned by nvs_open()
|
|
:return: None
|
|
"""
|
|
nvs_instance.__exit__(None, None, None)
|
|
|
|
|
|
def check_input_args(input_filename=None, output_filename=None, input_part_size=None, is_key_gen=None,
|
|
encrypt_mode=None, key_file=None, version_no=None, print_arg_str=None, print_encrypt_arg_str=None):
|
|
|
|
global version, is_encrypt_data, input_size, key_gen
|
|
|
|
version = version_no
|
|
is_encrypt_data = encrypt_mode
|
|
key_gen = is_key_gen
|
|
input_size = input_part_size
|
|
|
|
if is_encrypt_data.lower() == 'true':
|
|
is_encrypt_data = True
|
|
elif is_encrypt_data.lower() == 'false':
|
|
is_encrypt_data = False
|
|
|
|
if version == 'v1':
|
|
version = Page.VERSION1
|
|
elif version == 'v2':
|
|
version = Page.VERSION2
|
|
|
|
if key_gen.lower() == 'true':
|
|
key_gen = True
|
|
elif key_gen.lower() == 'false':
|
|
key_gen = False
|
|
|
|
if key_gen:
|
|
if all(arg is not None for arg in [input_filename, output_filename, input_size]):
|
|
if not is_encrypt_data:
|
|
sys.exit("--encrypt argument is missing or set to false.")
|
|
elif any(arg is not None for arg in [input_filename, output_filename, input_size]):
|
|
sys.exit(print_arg_str)
|
|
else:
|
|
if not input_size:
|
|
if not all(arg is not None for arg in [input_filename, output_filename]):
|
|
sys.exit(print_arg_str)
|
|
|
|
if is_encrypt_data and not key_gen and not key_file:
|
|
sys.exit(print_encrypt_arg_str)
|
|
|
|
if is_encrypt_data and key_gen and key_file:
|
|
sys.exit(print_encrypt_arg_str)
|
|
|
|
if not is_encrypt_data and key_file:
|
|
sys.exit("Invalid. Cannot give --keyfile as --encrypt is set to false.")
|
|
|
|
if input_size:
|
|
# Set size
|
|
input_size = int(input_size, 0)
|
|
|
|
if input_size % 4096 != 0:
|
|
sys.exit("Size of partition must be multiple of 4096")
|
|
|
|
# Update size as a page needs to be reserved of size 4KB
|
|
input_size = input_size - Page.PAGE_PARAMS["max_size"]
|
|
|
|
if input_size < (2 * Page.PAGE_PARAMS["max_size"]):
|
|
sys.exit("Minimum NVS partition size needed is 0x3000 bytes.")
|
|
|
|
|
|
def nvs_part_gen(input_filename=None, output_filename=None, input_part_size=None, is_key_gen=None, encrypt_mode=None, key_file=None, version_no=None):
|
|
""" Wrapper to generate nvs partition binary
|
|
|
|
:param input_filename: Name of input file containing data
|
|
:param output_filename: Name of output file to store generated binary
|
|
:param input_part_size: Size of partition in bytes (must be multiple of 4096)
|
|
:param is_key_gen: Enable encryption key generation in encryption mode
|
|
:param encrypt_mode: Enable/Disable encryption mode
|
|
:param key_file: Input file having encryption keys in encryption mode
|
|
:param version_no: Format Version number
|
|
:return: None
|
|
"""
|
|
|
|
global key_input, key_len_needed
|
|
|
|
key_len_needed = 64
|
|
key_input = bytearray()
|
|
|
|
if key_gen:
|
|
key_input = ''.join(random.choice('0123456789abcdef') for _ in range(128)).strip()
|
|
elif key_file:
|
|
with open(key_file, 'rb') as key_f:
|
|
key_input = key_f.read(64)
|
|
|
|
if all(arg is not None for arg in [input_filename, output_filename, input_size]):
|
|
input_file = open(input_filename, 'rt', encoding='utf8')
|
|
output_file = open(output_filename, 'wb')
|
|
|
|
with nvs_open(output_file, input_size) as nvs_obj:
|
|
reader = csv.DictReader(input_file, delimiter=',')
|
|
for row in reader:
|
|
try:
|
|
write_entry(nvs_obj, row["key"], row["type"], row["encoding"], row["value"])
|
|
except (InputError) as e:
|
|
print(e)
|
|
input_file.close()
|
|
output_file.close()
|
|
sys.exit(-2)
|
|
|
|
input_file.close()
|
|
output_file.close()
|
|
|
|
if key_gen:
|
|
keys_page_buf = bytearray(b'\xff') * Page.PAGE_PARAMS["max_size"]
|
|
key_bytes = bytearray()
|
|
if len(key_input) == key_len_needed:
|
|
key_bytes = key_input
|
|
else:
|
|
key_bytes = codecs.decode(key_input, 'hex')
|
|
key_len = len(key_bytes)
|
|
keys_page_buf[0:key_len] = key_bytes
|
|
crc_data = keys_page_buf[0:key_len]
|
|
crc_data = bytes(crc_data)
|
|
crc = zlib.crc32(crc_data, 0xFFFFFFFF)
|
|
struct.pack_into('<I', keys_page_buf, key_len, crc & 0xFFFFFFFF)
|
|
with open("encryption_keys.bin",'wb') as output_keys_file:
|
|
output_keys_file.write(keys_page_buf)
|
|
|
|
print("Binary created.")
|
|
|
|
|
|
def main():
|
|
parser = argparse.ArgumentParser(description="ESP32 NVS partition generation utility")
|
|
nvs_part_gen_group = parser.add_argument_group('To generate NVS partition')
|
|
nvs_part_gen_group.add_argument(
|
|
"--input",
|
|
help="Path to CSV file to parse.",
|
|
default=None)
|
|
|
|
nvs_part_gen_group.add_argument(
|
|
"--output",
|
|
help='Path to output converted binary file.',
|
|
default=None)
|
|
|
|
nvs_part_gen_group.add_argument(
|
|
"--size",
|
|
help='Size of NVS Partition in bytes (must be multiple of 4096)')
|
|
|
|
nvs_part_gen_group.add_argument(
|
|
"--version",
|
|
help='Set version. Default: v2',
|
|
choices=['v1','v2'],
|
|
default='v2',
|
|
type=str.lower)
|
|
|
|
keygen_action = nvs_part_gen_group.add_argument(
|
|
"--keygen",
|
|
help='Generate keys for encryption. Creates an `encryption_keys.bin` file. Default: false',
|
|
choices=['true','false'],
|
|
default='false',
|
|
type=str.lower)
|
|
|
|
nvs_part_gen_group.add_argument(
|
|
"--encrypt",
|
|
help='Set encryption mode. Default: false',
|
|
choices=['true','false'],
|
|
default='false',
|
|
type=str.lower)
|
|
|
|
nvs_part_gen_group.add_argument(
|
|
"--keyfile",
|
|
help='File having key for encryption (Applicable only if encryption mode is true)',
|
|
default=None)
|
|
|
|
key_gen_group = parser.add_argument_group('To generate encryption keys')
|
|
key_gen_group._group_actions.append(keygen_action)
|
|
|
|
args = parser.parse_args()
|
|
input_filename = args.input
|
|
output_filename = args.output
|
|
part_size = args.size
|
|
version_no = args.version
|
|
is_key_gen = args.keygen
|
|
is_encrypt_data = args.encrypt
|
|
key_file = args.keyfile
|
|
|
|
print_arg_str = "Invalid.\nTo generate nvs partition binary --input, --output and --size arguments are mandatory.\n \
|
|
To generate encryption keys --keygen argument is mandatory."
|
|
print_encrypt_arg_str = "Missing parameter. Enter --keyfile or --keygen."
|
|
|
|
check_input_args(input_filename,output_filename, part_size, is_key_gen, is_encrypt_data, key_file, version_no, print_arg_str, print_encrypt_arg_str)
|
|
nvs_part_gen(input_filename, output_filename, part_size, is_key_gen, is_encrypt_data, key_file, version_no)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|