CN103838997A - Single-chip microcomputer password verification method and device - Google Patents
Single-chip microcomputer password verification method and device Download PDFInfo
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- CN103838997A CN103838997A CN201210473845.3A CN201210473845A CN103838997A CN 103838997 A CN103838997 A CN 103838997A CN 201210473845 A CN201210473845 A CN 201210473845A CN 103838997 A CN103838997 A CN 103838997A
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Abstract
The invention provides a single-chip microcomputer password verification method and device, and belongs to the technical field of single-chip microcomputers. The single-chip microcomputer password verification method comprises the steps that an externally-connected device obtains a preset password, and sends a password verification instruction to a single-chip microcomputer; the single-chip microcomputer generates a challenge code, sends the challenge code to the externally-connected device, and generates the password verification time; the externally-connected device carries out combination encryption on the challenge code and the preset password to generate first encryption verification information; the single-chip microcomputer judges whether the password verification time is over or not and carries out time and timeout frequency verification; the single-chip microcomputer carries out combination encryption on the challenge code and a password stored in the single-chip microcomputer to generate second encryption verification information; the single-chip microcomputer carries out password and failure frequency verification on the externally-connected device according to the second encryption verification information and the first encryption verification information. According to the single-chip microcomputer password verification method and device, password verification of the externally-connected device to the single-chip microcomputer is achieved, it is ensured that operations such as the illegal access operation, the read-write modification operation and the online upgrading operation of the externally-connected device are prevented from being carried out on internal programs of the single-chip microcomputer on the premise that no authorization permission exists, and safety protection of the programs of the single-chip microcomputer is achieved.
Description
Technical field
The present invention relates to singlechip technology field, relate in particular to a kind of single-chip microcomputer method of password authentication and device.
Background technology
Some household electrical appliance instrument and meters, machinery and equipment all can realize robotization control with single-chip microcomputer at present.As long as use different interface circuits and work out different application programs and just can realize different functions.User can be by the DLL (dynamic link library) of single-chip microcomputer, to the user application of its inside storage conduct interviews, read and write, revise, the operation such as upgrading.But in the time that user carries out various operation by external equipment to single-chip microcomputer; external equipment is not permitted to control; there is the hidden danger of secure context; cannot carry out restricted protection to the amendment of single-chip programmer, download, upgrading license, make other people easily distort, steal or copy scm software program.
In order to solve the security hidden trouble of above-mentioned proposition; existing part single-chip microcomputer limits its programmable number of times; but because this type of single-chip microcomputer programmable number of times is limited, can not repeatedly upgrade the user application of its storage, its protectiveness is perfect not.Therefore,, in the time that user operates single-chip microcomputer by external equipment, can first carry out authentication to external equipment.The plain mode of authentication is exactly password.But if single-chip microcomputer directly adopts clear-text passwords to be transferred to external equipment, its security protection reduces greatly.
Summary of the invention
Under the prerequisite of license without permission, forbid that in order to ensure single-chip microcomputer internally stored program external equipment carries out the various operations such as unauthorized access, read-write amendment, online upgrading; and in the time that carrying out authentication to external equipment, single-chip microcomputer ensures cryptosecurity; prevent Brute Force; to realize the protection to Single Chip Microcomputer (SCM) program security, the present invention proposes a kind of single-chip microcomputer method of password authentication and device.
For reaching this object, the present invention by the following technical solutions:
A kind of single-chip microcomputer method of password authentication, described method comprises:
Step 1: external equipment obtains preset password, sends password authentification order to single-chip microcomputer;
Step 2: described single-chip microcomputer receives after described password authentification order, generates challenge code, and described challenge code is sent to described external equipment;
Step 3: described external equipment receives described challenge code, by described challenge code and described preset password combined ciphering, generates the first encrypted authentication information, and described the first encrypted authentication information is sent to described single-chip microcomputer;
Step 4: described challenge code and this single-chip microcomputer storage password are carried out combined ciphering by described single-chip microcomputer, generates the second encrypted authentication information;
Step 5: described single-chip microcomputer judges that whether described the first encrypted authentication information is consistent with described the second encrypted authentication information, if consistent, the password authentification success of described single-chip microcomputer to described external equipment, otherwise the password authentification failure of described single-chip microcomputer to described external equipment.
Further, described external equipment is inputted and is obtained preset password by user.
Further, described step 2 also comprises: described single-chip microcomputer produces the password authentification time;
Also comprise before described step 4: described single-chip microcomputer judges whether the described password authentification time finish, if finished, records expired times; Described single-chip microcomputer judges whether described external equipment to refuse password authentification a period of time according to described expired times.
Further, described external equipment receives described challenge code, and by described challenge code and described preset password combined ciphering, the first encrypted authentication information of generation comprises:
Described external equipment, by described challenge code and the combination of described preset password, generates the first character string information, and the array mode of wherein said challenge code and described preset password is challenge code+preset password;
Described external equipment is encrypted computing to described the first character string information, generates described the first encrypted authentication information, and described cryptographic calculation is for getting the computing of MD5 value.
Further, described challenge code and this single-chip microcomputer storage password are carried out combined ciphering by described single-chip microcomputer, and the second encrypted authentication information of generation comprises:
Described single-chip microcomputer, by described challenge code and this single-chip microcomputer storage password combination, generates the second character string information, and the array mode of wherein said challenge code and described preset password is challenge code+storage password;
Described single-chip microcomputer is encrypted computing to described the second character string information, generates described the second encrypted authentication information, and described cryptographic calculation is for getting the computing of MD5 value.
Further, when described single-chip microcomputer is failed to the password authentification of described external equipment, record the password authentification frequency of failure, described single-chip microcomputer judges whether described external equipment to refuse password authentification a period of time according to the described password authentification frequency of failure.
The present invention also provides a kind of single-chip microcomputer password authentication device, and described device comprises external equipment, single-chip microcomputer; Described external equipment comprises command sending unit, password generation unit, and described single-chip microcomputer comprises challenge code generation unit, password authentification unit;
Described command sending unit, for obtaining preset password, sends password authentification order to described single-chip microcomputer;
Described challenge code generation unit, for receiving described password authentification order, generates challenge code, and described challenge code is sent to described external equipment;
Described password generation unit, be connected with described command sending unit, for receiving described challenge code, by the preset password combined ciphering of described challenge code and described command sending unit, generate the first encrypted authentication information, and described the first encrypted authentication information is sent to described single-chip microcomputer;
Described password authentification unit, is connected with described challenge code generation unit, for the described challenge code of described challenge code generation unit and this single-chip microcomputer storage password are carried out to combined ciphering, generates the second encrypted authentication information;
Described password authentification unit, also judge that for passing through whether described the first encrypted authentication information is consistent with described the second encrypted authentication information, if consistent, the password authentification success of described single-chip microcomputer to described external equipment, otherwise the password authentification failure of described single-chip microcomputer to described external equipment.
Further, described command sending unit is inputted and is obtained preset password by user.
Further, described single-chip microcomputer also comprises time verifying unit, for generation of the password authentification time; Judge whether the described password authentification time finish, if finished, record expired times; Described single-chip microcomputer judges whether described external equipment to refuse password authentification a period of time according to described expired times.
Further, described password generation unit receives after described challenge code, and by the preset password combined ciphering of described challenge code and described command sending unit, the first encrypted authentication information of generation comprises:
Described password generation unit, by the preset password combination of described challenge code and described command sending unit, generates the first character string information, and wherein array mode is challenge code+preset password;
Described password generation unit is encrypted computing to described the first character string information, generates described the first encrypted authentication information, and wherein cryptographic calculation adopts and gets the computing of MD5 value.
Further, the described challenge code of described challenge code generation unit and this single-chip microcomputer storage password are carried out combined ciphering by described password authentification unit, and the second encrypted authentication information of generation comprises:
Described password authentification unit, by the described challenge code of described challenge code generation unit and this single-chip microcomputer storage password combination, generates the second character string information, and wherein array mode is challenge code+single-chip microcomputer password;
Described password generation unit is encrypted computing to described the second character string information, generates described the second encrypted authentication information, and wherein cryptographic calculation adopts and gets the computing of MD5 value.
Further, described password authentification unit is also in the time that described single-chip microcomputer is failed to the password authentification of described external equipment, record the password authentification frequency of failure, judge whether described external equipment to refuse password authentification a period of time according to the described password authentification frequency of failure.
Technical scheme of the present invention realizes the password authentification of single-chip microcomputer to external equipment by a kind of challenge response mode based on the password authentification time.Adopt ciphertext transmission password; in conjunction with the mode based on challenge response; the possibility of having avoided password to be intercepted and captured by Malware in transport process; require external equipment within the password authentification time, to respond, judge whether according to expired times, the password authentification frequency of failure a period of time that refuses inspection of books; can effectively prevent Brute Force; well ensure that single-chip microcomputer internally stored program forbids that under the prerequisite of license without permission user carries out the various operations such as unauthorized access, read-write amendment, online upgrading, has realized the security of Single Chip Microcomputer (SCM) program is protected.
Brief description of the drawings
Fig. 1 is a kind of single-chip microcomputer method of password authentication process flow diagram that the specific embodiment of the invention one provides;
Fig. 2 is a kind of single-chip microcomputer password authentication device schematic diagram that the specific embodiment of the invention two provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
In a kind of single-chip microcomputer method of password authentication proposing in the present invention and device, external equipment can be the various devices such as upgrading main frame, mobile phone, server, to the user program in single-chip microcomputer can upgrade, the various operations such as read-write, amendment.It is external equipment that various embodiments of the present invention are selected upgrading main frame; the operation that user program in single-chip microcomputer is carried out is updating operation; a kind of single-chip microcomputer method of password authentication and the device that adopt the present invention to propose; ensure that the single-chip microcomputer internally stored program main frame of forbidding upgrading carries out illegal online upgrading to it under the prerequisite of license without permission, realizing the protection to Single Chip Microcomputer (SCM) program security.
Embodiment mono-
Fig. 1 has shown a kind of single-chip microcomputer method of password authentication process flow diagram, and the present embodiment is by adopting a kind of challenge response mode based on the password authentification time to realize the password authentification of single-chip microcomputer to upgrading main frame, and concrete steps are as follows:
Step 101: user requires the preset password of checking to upgrading main frame input single-chip microcomputer in the mode of keyboard input, the preset password of upgrading host stores user input, sends password authentification order to single-chip microcomputer.
Step 102: single-chip microcomputer receives password authentification order, generates challenge code simultaneously, and challenge code is sent to upgrading main frame, and produce the password authentification time, for example 30 seconds.Wherein challenge code is generally selected the random code of 16-48 position, is preferably 32 random codes.
Step 103: upgrading main frame receives after the challenge code of single-chip microcomputer transmission, by the challenge code of its reception and preset password combination producing the first character string information, and the first character string information generating is got to MD5(Message-Digest Algorithm5, Message-Digest Algorithm 5) value is encrypted, generate the first encrypted authentication information, and its first encrypted authentication information is sent to single-chip microcomputer, wherein challenge code and preset password array mode are selected challenge code+preset password.
Step 104: single-chip microcomputer receives the first encrypted authentication information, judges whether 30 seconds password authentification time finished.If do not finished, execution step 105.If finished, illustrate that this password authentification is overtime, record expired times.If expired times are greater than the number of times of regulation, for example 3 times, expired times zero clearing, single-chip microcomputer is refused password authentification a period of time to upgrading main frame, and for example 5 minutes, otherwise single-chip microcomputer is waited for and is received password authentification order next time.
Step 105: the challenge code generating in step 102 and this single-chip microcomputer storage password are carried out combination producing the second character string information by single-chip microcomputer, and the second character string information generating is got to MD5 value and is encrypted, generate the second encrypted authentication information, wherein store password and be single-chip microcomputer carrying out before password authentification pre-stored well, challenge code and this single-chip microcomputer storage password combination mode are selected challenge code+storage password.
Step 106: whether the second encrypted authentication information that single-chip microcomputer generates with step 105 by the first encrypted authentication information more having received is consistent, judges upgrading main frame password authentification success or not.If consistent, upgrading main frame password authentification success, otherwise the password authentification frequency of failure is recorded in upgrading main frame password authentification failure.If the password authentification frequency of failure is greater than the number of times of regulation, the zero clearing of the password authentification frequency of failure, single-chip microcomputer is refused password authentification a period of time to upgrading main frame, and for example 5 minutes, otherwise single-chip microcomputer is waited for and is received password authentification order next time.
In above-mentioned steps, all adopt and get md5 encryption computing to the first character string information with to the second character string information, because MD5 value produces by irreversible character string mapping algorithm, there is uniqueness, if anyone has done any change to original or character string, its MD5 value all can change, this cryptographic algorithm can realize carries out authentication to single-chip microcomputer, unique identification.
The present embodiment has provided the method for password authentication of a kind of single-chip microcomputer to upgrading main frame by the challenge response mode based on the password authentification time.The method adopts ciphertext transmission password; in conjunction with the mode based on challenge response; ensure the safety of single-chip microcomputer password; require upgrading main frame within the password authentification time, to respond, judge whether according to expired times, the password authentification frequency of failure a period of time that refuses inspection of books; can effectively prevent Brute Force; well ensure that single-chip microcomputer internally stored program forbids that user carries out illegal online upgrading operation under the prerequisite of license without permission, realized the security protection to Single Chip Microcomputer (SCM) program.
Embodiment bis-
Referring to Fig. 2, a kind of single-chip microcomputer password authentication device schematic diagram.The password authentication device that single-chip microcomputer carries out when upgrading main frame is carried out to online upgrading comprises upgrading main frame, single-chip microcomputer.Upgrading main frame comprises command sending unit 11, password generation unit 12, and single-chip microcomputer comprises challenge code generation unit 21, time verifying unit 22, password authentification unit 23.
Challenge code generation unit 21 for receiving password authentification order, generates challenge code simultaneously, is sent to upgrading main frame.Wherein challenge code is generally selected the random code of 16-48 position, is preferably 32 random codes.
Whether password authentification unit 23 is also for consistent with the second encrypted authentication information by comparing the first encrypted authentication information, judge upgrading main frame password authentification success or not, if consistent, upgrading main frame password authentification success, otherwise upgrading main frame password authentification failure, records the password authentification frequency of failure.If the password authentification frequency of failure is greater than the number of times of regulation, the zero clearing of the password authentification frequency of failure, single-chip microcomputer is refused password authentification a period of time to upgrading main frame, and for example 5 minutes, otherwise single-chip microcomputer is waited for and is received password authentification order next time.
The device that the present embodiment provides a kind of single-chip microcomputer to carry out password authentification to upgrading main frame, device has carried out cryptographic calculation to single-chip microcomputer password, the transmission of employing ciphertext, ensure the security of single-chip microcomputer password, and by time verifying unit 22 and password authentification unit 23, realize and required upgrading main frame within the password authentification time, to respond, judge whether according to expired times, the password authentification frequency of failure a period of time that refuses inspection of books, can effectively prevent Brute Force.
One of ordinary skill in the art will appreciate that all or part of step that realizes above-described embodiment can complete by hardware, also can carry out the hardware that instruction is relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be ROM (read-only memory), disk or CD etc.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. a single-chip microcomputer method of password authentication, is characterized in that, described method comprises:
Step 1: external equipment obtains preset password, sends password authentification order to single-chip microcomputer;
Step 2: described single-chip microcomputer receives after described password authentification order, generates challenge code, and described challenge code is sent to described external equipment;
Step 3: described external equipment receives described challenge code, by described challenge code and described preset password combined ciphering, generates the first encrypted authentication information, and described the first encrypted authentication information is sent to described single-chip microcomputer;
Step 4: described challenge code and this single-chip microcomputer storage password are carried out combined ciphering by described single-chip microcomputer, generates the second encrypted authentication information;
Step 5: described single-chip microcomputer judges that whether described the first encrypted authentication information is consistent with described the second encrypted authentication information, if consistent, the password authentification success of described single-chip microcomputer to described external equipment, otherwise the password authentification failure of described single-chip microcomputer to described external equipment.
2. single-chip microcomputer method of password authentication according to claim 1, is characterized in that, described external equipment is inputted and obtained preset password by user.
3. single-chip microcomputer method of password authentication according to claim 1, is characterized in that, described step 2 also comprises: described single-chip microcomputer produces the password authentification time;
Also comprise before described step 4: described single-chip microcomputer judges whether the described password authentification time finish, if finished, records expired times; Described single-chip microcomputer judges whether described external equipment to refuse password authentification a period of time according to described expired times.
4. single-chip microcomputer method of password authentication according to claim 1, is characterized in that, described external equipment receives described challenge code, and by described challenge code and described preset password combined ciphering, the first encrypted authentication information of generation comprises:
Described external equipment, by described challenge code and the combination of described preset password, generates the first character string information, and the array mode of wherein said challenge code and described preset password is challenge code+preset password;
Described external equipment is encrypted computing to described the first character string information, generates described the first encrypted authentication information, and described cryptographic calculation is for getting the computing of MD5 value.
5. single-chip microcomputer method of password authentication according to claim 1, is characterized in that, described challenge code and this single-chip microcomputer storage password are carried out combined ciphering by described single-chip microcomputer, and the second encrypted authentication information of generation comprises:
Described single-chip microcomputer, by described challenge code and this single-chip microcomputer storage password combination, generates the second character string information, and the array mode of wherein said challenge code and described preset password is challenge code+storage password;
Described single-chip microcomputer is encrypted computing to described the second character string information, generates described the second encrypted authentication information, and described cryptographic calculation is for getting the computing of MD5 value.
6. single-chip microcomputer method of password authentication according to claim 1, it is characterized in that, when described single-chip microcomputer is failed to the password authentification of described external equipment, record the password authentification frequency of failure, described single-chip microcomputer judges whether described external equipment to refuse password authentification a period of time according to the described password authentification frequency of failure.
7. a single-chip microcomputer password authentication device, is characterized in that, described device comprises external equipment, single-chip microcomputer; Described external equipment comprises command sending unit, password generation unit, and described single-chip microcomputer comprises challenge code generation unit, password authentification unit;
Described command sending unit, for obtaining preset password, sends password authentification order to described single-chip microcomputer;
Described challenge code generation unit, for receiving described password authentification order, generates challenge code, and described challenge code is sent to described external equipment;
Described password generation unit, be connected with described command sending unit, for receiving described challenge code, by the preset password combined ciphering of described challenge code and described command sending unit, generate the first encrypted authentication information, and described the first encrypted authentication information is sent to described single-chip microcomputer;
Described password authentification unit, is connected with described challenge code generation unit, for the described challenge code of described challenge code generation unit and this single-chip microcomputer storage password are carried out to combined ciphering, generates the second encrypted authentication information;
Described password authentification unit, also judge that for passing through whether described the first encrypted authentication information is consistent with described the second encrypted authentication information, if consistent, the password authentification success of described single-chip microcomputer to described external equipment, otherwise the password authentification failure of described single-chip microcomputer to described external equipment.
8. single-chip microcomputer password authentication device according to claim 7, is characterized in that, described command sending unit is inputted and obtained preset password by user.
9. single-chip microcomputer password authentication device according to claim 7, it is characterized in that, described single-chip microcomputer also comprises time verifying unit, for generation of the password authentification time, judge whether the described password authentification time finishes, if finished, record expired times, judge whether described external equipment to refuse password authentification a period of time according to described expired times.
10. single-chip microcomputer password authentication device according to claim 7, it is characterized in that, described password generation unit receives after described challenge code, and by the preset password combined ciphering of described challenge code and described command sending unit, the first encrypted authentication information of generation comprises:
Described password generation unit, by the preset password combination of described challenge code and described command sending unit, generates the first character string information, and wherein array mode is challenge code+preset password;
Described password generation unit is encrypted computing to described the first character string information, generates described the first encrypted authentication information, and wherein cryptographic calculation adopts and gets the computing of MD5 value.
11. single-chip microcomputer password authentication devices according to claim 7, is characterized in that, the described challenge code of described challenge code generation unit and this single-chip microcomputer storage password are carried out combined ciphering by described password authentification unit, and the second encrypted authentication information of generation comprises:
Described password authentification unit, by the described challenge code of described challenge code generation unit and this single-chip microcomputer storage password combination, generates the second character string information, and wherein array mode is challenge code+single-chip microcomputer password;
Described password generation unit is encrypted computing to described the second character string information, generates described the second encrypted authentication information, and wherein cryptographic calculation adopts and gets the computing of MD5 value.
12. single-chip microcomputer password authentication devices according to claim 7, it is characterized in that, described password authentification unit is also in the time that described single-chip microcomputer is failed to the password authentification of described external equipment, record the password authentification frequency of failure, judge whether described external equipment to refuse password authentification a period of time according to the described password authentification frequency of failure.
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| CN109784045B (en) * | 2017-11-14 | 2023-08-22 | 厦门雅迅网络股份有限公司 | Dual system communication access control method and computer readable storage medium |
| CN111209543A (en) * | 2019-11-28 | 2020-05-29 | 郑州众智科技股份有限公司 | Method for encrypting and verifying generator set controller and encryption system |
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Application publication date: 20140604 |