CN111062007A - MCU program encryption method, intelligent terminal and storage medium - Google Patents
MCU program encryption method, intelligent terminal and storage medium Download PDFInfo
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- CN111062007A CN111062007A CN201911229850.8A CN201911229850A CN111062007A CN 111062007 A CN111062007 A CN 111062007A CN 201911229850 A CN201911229850 A CN 201911229850A CN 111062007 A CN111062007 A CN 111062007A
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- 238000009825 accumulation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
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- 238000004891 communication Methods 0.000 description 1
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- 238000004590 computer program Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/12—Protecting executable software
- G06F21/121—Restricting unauthorised execution of programs
- G06F21/123—Restricting unauthorised execution of programs by using dedicated hardware, e.g. dongles, smart cards, cryptographic processors, global positioning systems [GPS] devices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/101—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM] by binding digital rights to specific entities
- G06F21/1011—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM] by binding digital rights to specific entities to devices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/107—License processing; Key processing
Abstract
The invention discloses an MCU program encryption method, an intelligent terminal and a storage medium, wherein the method comprises the following steps: the upper computer is connected with the MCU, reads the chip ID of the MCU and generates a first secret key; the upper computer writes the first secret key into the tail of a BIN file of an execution program, generates a new BIN file and writes the new BIN file into a ROM program storage area of the MCU; the MCU reads the chip ID of the MCU, generates a second key, places the second key in the RAM, reads the first key and judges whether the first key and the second key are consistent; and when the watchdog timer is inconsistent, the watchdog timer overflows out of the reset chip, and when the watchdog timer is consistent, the watchdog timer is reset. According to the invention, a software mode is adopted for encryption and theft prevention, each chip corresponds to a different execution program BIN file, the chip cannot normally run and work after being copied, a comparison secret key method is embedded into a normal function, the anti-compiling and anti-cracking are realized, and the hardware cost is not increased.
Description
Technical Field
The invention relates to the technical field of computer application, in particular to an MCU (microprogrammed control Unit) program encryption method, an intelligent terminal and a storage medium.
Background
The MCU is also called a singlechip, is an integrated circuit chip, is a small and perfect microcomputer system formed by integrating functions of a central processing unit CPU with data processing capacity, a random access memory RAM, a read-only memory ROM, various I/O ports, an interrupt system, a timer/counter and the like on a silicon chip by adopting a super-large scale integrated circuit technology, has small volume, light weight and low price, and provides convenient conditions for learning, application and development. The single chip microcomputer has wide application fields, such as intelligent instruments, real-time industrial control, communication equipment, navigation systems, household appliances and the like.
Some encrypted MCU chips can acquire a BIN file (binary file) for copying through a hard cracking mode, most general MCU chips do not have a safety protection mechanism, and the codes in the MCU chips are protected by adopting a scheme of MCU plus the encrypted chips, so that the mode is relatively safe, but one encrypted chip needs to be additionally arranged, and the product cost is increased.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention mainly aims to provide an MCU program encryption method, an intelligent terminal and a storage medium, aiming at solving the defects in the prior art.
In order to achieve the above object, the present invention provides an MCU program encryption method, comprising the steps of:
the upper computer is connected with the MCU, reads the chip ID of the MCU and generates a first secret key;
the upper computer writes the first secret key into the tail of a BIN file of an execution program, generates a new BIN file and writes the new BIN file into a ROM program storage area of the MCU;
the MCU reads the chip ID of the MCU, generates a second key, places the second key in the RAM, reads the first key and judges whether the first key and the second key are consistent;
and when the watchdog timer is inconsistent, the watchdog timer overflows out of the reset chip, and when the watchdog timer is consistent, the watchdog timer is reset.
Optionally, the MCU program encryption method includes the steps of connecting the upper computer to the MCU, reading the chip ID of the MCU, and generating a first key, and specifically includes:
starting the upper computer burning program;
and the upper computer burning program is connected with the MCU through a burning program tool, reads the chip ID of the MCU, and generates a first key with 8 bytes through a custom algorithm.
Optionally, the MCU program encryption method, wherein the upper computer writes the first key into the end of a BIN file of an execution program, generates a new BIN file, and writes the new BIN file into a ROM program storage area of the MCU specifically includes:
the upper computer burning program writes the first secret key into the tail of a BIN file of an execution program and generates a new BIN file;
and the upper computer burning program writes the new BIN file into the ROM program storage area of the MCU.
Optionally, the MCU program encryption method includes reading a chip ID of the MCU, generating a second key, placing the second key in the RAM, reading the first key, and determining whether the first key and the second key are consistent, and specifically includes:
the MCU is electrified to start working, the chip ID of the MCU is read through the MCU executive program, a second key with 8 bytes is generated through a custom algorithm, and the second key is placed in the RAM;
the MCU executes a program to read the first key with 8 bytes of ROM tail address;
and the MCU executes a program to compare the first secret key in the ROM with the second secret key in the RAM and judge whether the first secret key and the second secret key are consistent.
Optionally, the MCU program encryption method, wherein the resetting of the watchdog timer is performed when the watchdog timer is inconsistent with the watchdog timer, and the resetting of the watchdog timer is performed when the watchdog timer is consistent with the watchdog timer, specifically includes:
when the first key in the ROM is inconsistent with the second key in the RAM, the CPU controls the watchdog timer to overflow and reset the chip;
the CPU resets a watchdog timer when the first key in ROM is consistent with the second key in RAM.
Optionally, in the MCU program encryption method, the first key and the second key are keys that convert plaintext of the chip ID into ciphertext of 8 bytes by a custom algorithm.
In addition, to achieve the above object, the present invention further provides an MCU program encryption system, wherein the MCU program encryption system includes: the MCU is connected with the upper computer;
the upper computer is used for reading the chip ID of the MCU and generating a first secret key; the upper computer is also used for writing the first secret key into the tail end of a BIN file of an execution program, generating a new BIN file and writing the new BIN file into a ROM program storage area of the MCU;
the MCU is used for reading the chip ID of the MCU, generating a second key to be placed in the RAM, reading the first key, judging whether the first key is consistent with the second key or not, controlling the watchdog timer to overflow the reset chip when the first key is inconsistent with the second key, and resetting the watchdog timer when the first key is consistent with the second key.
In addition, in order to achieve the above object, the present invention further provides a storage medium, wherein the storage medium stores an MCU program encryption program, and the MCU program encryption program implements the steps of the MCU program encryption method described above when executed by a processor.
The method comprises the steps that an upper computer is connected with an MCU (microprogrammed control unit), the chip ID of the MCU is read, and a first secret key is generated; the upper computer writes the first secret key into the tail of a BIN file of an execution program, generates a new BIN file and writes the new BIN file into a ROM program storage area of the MCU; the MCU reads the chip ID of the MCU, generates a second key, places the second key in the RAM, reads the first key and judges whether the first key and the second key are consistent; and when the watchdog timer is inconsistent, the watchdog timer overflows out of the reset chip, and when the watchdog timer is consistent, the watchdog timer is reset. According to the invention, a software mode is adopted for encryption and theft prevention, each chip corresponds to a different execution program BIN file, the chip cannot normally run and work after being copied, a comparison secret key method is embedded into a normal function, the anti-compiling and anti-cracking are realized, and the hardware cost is not increased.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of the MCU program encryption method of the present invention;
FIG. 2 is a flowchart of step S10 in the MCU program encryption method according to the present invention;
FIG. 3 is a flowchart of step S20 in the MCU program encryption method according to the present invention;
FIG. 4 is a flowchart of step S30 in the MCU program encryption method according to the present invention;
FIG. 5 is a flowchart of step S40 in the MCU program encryption method according to the present invention;
FIG. 6 is a flow chart of the whole execution process of the MCU program encryption method of the present invention;
fig. 7 is a functional schematic diagram of the MCU program encryption system according to a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the MCU program encryption method according to the preferred embodiment of the present invention includes the following steps:
and step S10, connecting the upper computer with the MCU, reading the chip ID of the MCU, and generating a first key.
Please refer to fig. 2, which is a flowchart of step S10 in the MCU program encryption method according to the present invention.
As shown in fig. 2, the step S10 includes:
s11, starting the upper computer burning program;
and S12, connecting the upper computer burning program with the MCU through a burning program tool, reading the chip ID of the MCU, and generating a first key with 8 bytes through a custom algorithm.
Specifically, each MCU has a unique chip ID, the upper computer reads the chip ID before starting a burning program, a group of first KEYs (KEY) with the length of 8 bytes is obtained through self-defined algorithm conversion, and the KEYs are parameters which are input in an algorithm for converting a plaintext into a ciphertext or converting the ciphertext into the plaintext.
The self-defined algorithm may be simple accumulation, and is used to convert the plaintext of the chip ID into a KEY of 8 bytes of ciphertext.
And step S20, the upper computer writes the first key into the end of the BIN file of the execution program, generates a new BIN file and writes the new BIN file into the ROM program storage area of the MCU.
Please refer to fig. 3, which is a flowchart of step S20 in the MCU program encryption method according to the present invention.
As shown in fig. 3, the step S20 includes:
s21, the upper computer burning program writes the first key into the tail of the BIN file of the executive program and generates a new BIN file;
and S22, writing the new BIN file into the ROM program storage area of the MCU by the upper computer burning program.
Specifically, the upper computer burning program adds the first key of 8 bytes to the end of the BIN file of the execution program, i.e. generates a new BIN file, and then the execution program and the first key of 8 bytes (i.e. the new BIN file) are burned into a ROM (Read-Only Memory, a solid-state semiconductor Memory capable of Only reading out data stored in advance, which is characterized in that once the data is stored, the data cannot be changed or deleted, and the data is usually used in an electronic or computer system which does not need to change the data frequently, and the data does not disappear due to power supply shutdown) program storage area of the MCU.
And step S30, the MCU reads the chip ID of the MCU, generates a second key, places the second key in the RAM, reads the first key and judges whether the first key and the second key are consistent.
Please refer to fig. 4, which is a flowchart of step S30 in the MCU program encryption method according to the present invention.
As shown in fig. 4, the step S30 includes:
s31, the MCU is electrified to start working, the MCU executes a program to read the chip ID of the MCU, generates a second key with 8 bytes through a custom algorithm, and places the second key in the RAM;
s32, the MCU executes a program to read the first key with 8 bytes at the ROM tail address;
s33, the MCU executes the program to compare the first key in the ROM with the second key in the RAM and judge whether the two are consistent.
Specifically, the MCU starts up to run and read the chip ID, obtains a group of 8-byte second KEYs through the same custom algorithm, and puts the group of 8-byte second KEYs into a RAM (Random Access Memory, also called a main Memory, which is an internal Memory for directly exchanging data with the CPU, which can be read and written at any time and is fast, and is usually used as a temporary data storage medium for an operating system or other running programs, and when the RAM works, information can be written or read from any specified address) in a Memory global variable, and adds a KEY comparison in a WDT (Watch Dog Timer) program, that is, obtains 8-byte KEYs (first KEYs) from the end of an execution program to compare with 8-byte KEYs (second KEYs) in the RAM Memory, and determines whether the first KEYs and the second KEYs are consistent.
And step S40, if the two timers are not consistent, the watchdog timer overflows to reset the chip, and if the two timers are consistent, the watchdog timer is reset.
Please refer to fig. 5, which is a flowchart of step S40 in the MCU program encryption method according to the present invention.
As shown in fig. 5, the step S40 includes:
s41, when the first key in the ROM is inconsistent with the second key in the RAM, the CPU controls the watchdog timer to overflow and reset the chip;
s42, when the first key in ROM is consistent with the second key in RAM, the CPU resets the watchdog timer.
Specifically, if the first key in the ROM is the same as the second key in the RAM, a WDT (watchdog timer) is reset, and if the first key in the ROM is not the same as the second key in the RAM, the WDT (watchdog timer) overflows or is called "timeout", and the WDT timeout forces the device to reset, so that the execution program cannot normally run on the single chip microcomputer.
The whole implementation process is shown in fig. 6:
a: starting a burning program of the upper computer;
b: connecting the MCU through a burning program tool, reading a chip ID of the MCU, and generating 8-byte KEY through a custom algorithm;
c: writing the KEY into the tail of the BIN file of the executive program to generate a new BIN file;
d: writing the new BIN file into a ROM program storage area of the MCU;
e: finishing the burning;
f: the MCU is electrified to start working;
g: reading the chip ID of the MCU, generating 8-byte KEY through a custom algorithm, and placing the KEY into the RAM;
h: reading 8 bytes KEY at the end address of the ROM;
i, comparing KEY in the ROM with KEY in the RAM;
j: the KEY in the ROM is different from the KEY in the RAM, and the WDT overflows the reset chip;
k, resetting WDT when KEY in ROM is the same as KEY in RAM;
m: the routine is ended.
The invention adopts a software mode to encrypt MCU execution programs (also called BIN files), each MCU has a unique chip ID, an upper computer reads the chip ID before starting a burning program, a group of KEY with the length of 8 bytes is obtained through conversion of a custom algorithm, the custom algorithm can be simple accumulation, the plaintext of the chip ID is converted into the KEY with the ciphertext of 8 bytes, the KEY with the 8 bytes is added to the tail part of the execution program, then the execution program and the KEY with the 8 bytes are burnt into the MCU, the MCU starts up to run and read the chip ID, a group of KEY with the 8 bytes is obtained through the same custom algorithm and is put into an RAM, comparison of the KEY is added in a WDT program, the KEY with the 8 bytes in the RAM is obtained from the tail part of the execution program for comparison, WDT is reset if equal, WDT overflows if unequal, or overtime exists, WDT can force resetting of a device, therefore, the executive program can not normally run on the singlechip.
The invention adopts a software mode to encrypt and prevent theft, each chip corresponds to different execution program BIN files, the chips cannot normally run and work after being copied, the KEY method is embedded into a normal function to prevent the compiling and the decoding, and the software method does not increase the hardware cost for preventing theft.
Further, as shown in fig. 6 and 7, based on the MCU program encryption method, the present invention further provides an MCU program encryption system, wherein the MCU program encryption system comprises: the MCU is connected with the upper computer; the upper computer is used for reading the chip ID of the MCU and generating a first secret key; the upper computer is also used for writing the first secret key into the tail end of a BIN file of an execution program, generating a new BIN file and writing the new BIN file into a ROM program storage area of the MCU; the MCU is used for reading the chip ID of the MCU, generating a second key to be placed in the RAM, reading the first key, judging whether the first key is consistent with the second key or not, controlling the watchdog timer to overflow the reset chip when the first key is inconsistent with the second key, and resetting the watchdog timer when the first key is consistent with the second key.
The invention also provides a storage medium, wherein the storage medium stores an MCU program encryption program, and the MCU program encryption program realizes the steps of the MCU program encryption method when being executed by a processor.
In summary, the present invention provides an MCU program encryption method, an intelligent terminal and a storage medium, where the method includes: the upper computer is connected with the MCU, reads the chip ID of the MCU and generates a first secret key; the upper computer writes the first secret key into the tail of a BIN file of an execution program, generates a new BIN file and writes the new BIN file into a ROM program storage area of the MCU; the MCU reads the chip ID of the MCU, generates a second key, places the second key in the RAM, reads the first key and judges whether the first key and the second key are consistent; and when the watchdog timer is inconsistent, the watchdog timer overflows out of the reset chip, and when the watchdog timer is consistent, the watchdog timer is reset. According to the invention, a software mode is adopted for encryption and theft prevention, each chip corresponds to a different execution program BIN file, the chip cannot normally run and work after being copied, a comparison secret key method is embedded into a normal function, the anti-compiling and anti-cracking are realized, and the hardware cost is not increased.
Of course, it will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program instructing relevant hardware (such as a processor, a controller, etc.), and the program may be stored in a computer readable storage medium, and when executed, the program may include the processes of the above method embodiments. The storage medium may be a memory, a magnetic disk, an optical disk, etc.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (8)
1. An MCU program encryption method, characterized in that the MCU program encryption method comprises:
the upper computer is connected with the MCU, reads the chip ID of the MCU and generates a first secret key;
the upper computer writes the first secret key into the tail of a BIN file of an execution program, generates a new BIN file and writes the new BIN file into a ROM program storage area of the MCU;
the MCU reads the chip ID of the MCU, generates a second key, places the second key in the RAM, reads the first key and judges whether the first key and the second key are consistent;
and when the watchdog timer is inconsistent, the watchdog timer overflows out of the reset chip, and when the watchdog timer is consistent, the watchdog timer is reset.
2. The MCU program encryption method according to claim 1, wherein the upper computer is connected to an MCU, reads a chip ID of the MCU, and generates a first key, specifically comprising:
starting the upper computer burning program;
and the upper computer burning program is connected with the MCU through a burning program tool, reads the chip ID of the MCU, and generates a first key with 8 bytes through a custom algorithm.
3. The MCU program encryption method of claim 2, wherein the host computer writes the first key to the end of a BIN file of an execution program to generate a new BIN file and writes the new BIN file into a ROM program storage area of the MCU, specifically comprising:
the upper computer burning program writes the first secret key into the tail of a BIN file of an execution program and generates a new BIN file;
and the upper computer burning program writes the new BIN file into the ROM program storage area of the MCU.
4. The MCU program encryption method of claim 3, wherein the MCU reads a chip ID of the MCU, generates a second key, places the second key in the RAM, reads the first key, and determines whether the first key and the second key are consistent, specifically comprising:
the MCU is electrified to start working, the chip ID of the MCU is read through the MCU executive program, a second key with 8 bytes is generated through a custom algorithm, and the second key is placed in the RAM;
the MCU executes a program to read the first key with 8 bytes of ROM tail address;
and the MCU executes a program to compare the first secret key in the ROM with the second secret key in the RAM and judge whether the first secret key and the second secret key are consistent.
5. The MCU program encryption method of claim 4, wherein the watchdog timer overflows the reset chip when inconsistent and resets when consistent, specifically comprising:
when the first key in the ROM is inconsistent with the second key in the RAM, the CPU controls the watchdog timer to overflow and reset the chip;
the CPU resets a watchdog timer when the first key in ROM is consistent with the second key in RAM.
6. The MCU program encryption method of claim 1, wherein the first key and the second key are keys for converting plaintext of the chip ID into ciphertext of 8 bytes by a custom algorithm.
7. An MCU program encryption system, characterized in that, the MCU program encryption system includes: the MCU is connected with the upper computer;
the upper computer is used for reading the chip ID of the MCU and generating a first secret key; the upper computer is also used for writing the first secret key into the tail end of a BIN file of an execution program, generating a new BIN file and writing the new BIN file into a ROM program storage area of the MCU;
the MCU is used for reading the chip ID of the MCU, generating a second key to be placed in the RAM, reading the first key, judging whether the first key is consistent with the second key or not, controlling the watchdog timer to overflow the reset chip when the first key is inconsistent with the second key, and resetting the watchdog timer when the first key is consistent with the second key.
8. A storage medium, characterized in that the storage medium stores an MCU program encryption program, which when executed by a processor implements the steps of the MCU program encryption method of any one of claims 1-6.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113194067A (en) * | 2021-03-29 | 2021-07-30 | 无锡九科芯微电子有限公司 | MCU communication system and method |
| CN113204805A (en) * | 2021-04-25 | 2021-08-03 | 山东英信计算机技术有限公司 | Server power-on method, system, equipment and medium |
| CN113806774A (en) * | 2021-09-15 | 2021-12-17 | 惠州市德赛电池有限公司 | Encryption method, decryption method and system |
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2019
- 2019-12-04 CN CN201911229850.8A patent/CN111062007A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113194067A (en) * | 2021-03-29 | 2021-07-30 | 无锡九科芯微电子有限公司 | MCU communication system and method |
| CN113204805A (en) * | 2021-04-25 | 2021-08-03 | 山东英信计算机技术有限公司 | Server power-on method, system, equipment and medium |
| CN113806774A (en) * | 2021-09-15 | 2021-12-17 | 惠州市德赛电池有限公司 | Encryption method, decryption method and system |
| CN113806774B (en) * | 2021-09-15 | 2024-02-13 | 惠州市德赛电池有限公司 | Encryption method, decryption method and system |
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Address after: No.23, 136 Yuhai East Road, Hangzhou Bay New District, Ningbo City, Zhejiang Province Applicant after: Fu Zhi Yi Internet of vehicles (Ningbo) Co.,Ltd. Address before: 518000 Room 201, building A, No. 1, Qian Wan Road, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong (Shenzhen Qianhai business secretary Co., Ltd.) Applicant before: FUERDA IOV (SHENZHEN) Co.,Ltd. |
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |