CN104732138A - Diagnostic equipment upgrading method and diagnostic equipment - Google Patents
Diagnostic equipment upgrading method and diagnostic equipment Download PDFInfo
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- CN104732138A CN104732138A CN201410855503.7A CN201410855503A CN104732138A CN 104732138 A CN104732138 A CN 104732138A CN 201410855503 A CN201410855503 A CN 201410855503A CN 104732138 A CN104732138 A CN 104732138A
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Abstract
The embodiment of the invention discloses a diagnostic equipment upgrading method. The method includes the steps that an upgrading file and ciphertext which are sent by a control device connected with diagnostic equipment are received; whether the upgrading file is legal or not is judged according to the ciphertext; when the upgrading file is legal, the diagnostic equipment is upgraded according to the upgrading file. The embodiment of the invention further discloses the diagnostic equipment. By means of the diagnostic equipment upgrading method and the diagnostic equipment, the legality and the performability of the file executed in the diagnostic equipment can be guaranteed, so that the diagnostic equipment can operate more stably and safely.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of upgrade method and equipment of diagnostic device.
Background technology
Along with the high speed development of automobile, the complicacy of automobile function improves day by day, and in order to improve the security of automobile, automotive diagnostic installation also highlights more and more important in daily life.
At present, because the update of automobile is frequent, in order to the diagnosis making automotive diagnostic installation can support new automobile, automotive diagnostic installation needs to upgrade, and could meet the demand of user.
But, current automotive diagnostic installation is carrying out in the process of upgrading, automotive diagnostic installation is only read upgrade file, and upgrade according to rising file, this makes automotive diagnostic installation may download to illegal upgrade software to upgrade, make automotive diagnostic installation cannot ensure the legitimacy of its upgrade software, as integrality and security, this may cause automotive diagnostic installation to carry out wrong diagnosis to automobile, this brings the inconvenient life security that even may cause user to user, makes the safety of user in the process using automobile can not get ensureing.
Summary of the invention
Embodiment of the present invention technical matters to be solved is, provides a kind of upgrade method and diagnostic device of diagnostic device.The legitimacy of the file run in diagnostic device and the completing property of file can be ensured, diagnostic device can be stablized more and safe operation.
In order to solve the problems of the technologies described above, embodiments provide a kind of upgrade method of diagnostic device, comprising:
The upgrade file that the opertaing device that reception is connected with diagnostic device sends and ciphertext;
Judge that whether described upgrade file is legal according to described ciphertext;
When described upgrade file is legal, according to described upgrade file, described diagnostic device is upgraded.
Wherein, describedly judge that whether described upgrade file is legal according to described ciphertext and comprise:
Pre-arranged public is used to verify described ciphertext;
When described cryptogram validation success, determine that described upgrade file is legal.
Wherein, use public-key described in and checking is carried out to described ciphertext comprise:
Adopt Predistribution Algorithm to calculate described upgrade file, obtain the first digest value;
Use described PKI, adopt decipherment algorithm to verify described ciphertext and described first digest value.
Wherein, described method also comprises:
When described ciphertext is unsuccessful, delete described upgrade file.
Correspondingly, the embodiment of the present invention additionally provides a kind of diagnostic device, comprising:
Receiving element, for receiving the upgrade file and ciphertext that the opertaing device that is connected with diagnostic device sends;
According to described ciphertext, judging unit, for judging that whether described upgrade file is legal;
Upgrade unit, for when described upgrade file is legal, upgrades to described diagnostic device according to described upgrade file.
Wherein, described judging unit comprises:
First checking subelement, verifies described ciphertext for using pre-arranged public;
Determine subelement, for when described cryptogram validation is successful, determine that described upgrade file is legal.
Wherein, described first checking subelement comprises:
Computation subunit, for adopting Predistribution Algorithm to calculate described upgrade file, obtains the first digest value;
Second checking subelement, for using described PKI, adopts decipherment algorithm to verify described ciphertext and described first digest value.
Wherein, described equipment also comprises:
Delete cells, for when described ciphertext is unsuccessful, deletes described upgrade file.
Implement the embodiment of the present invention, there is following beneficial effect:
In the invention process, diagnostic device receives the upgrade file and ciphertext that the opertaing device that is connected with diagnostic device sends, judge that whether described upgrade file is legal according to described ciphertext, and when described upgrade file is legal, according to described upgrade file, described diagnostic device is upgraded, this can ensure the legitimacy of the file run in diagnostic device and the completing property of file, diagnostic device can be stablized more and safe operation.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the first embodiment schematic flow sheet of the upgrade method of a kind of diagnostic device of the present invention;
Fig. 2 is the second embodiment schematic flow sheet of the upgrade method of a kind of diagnostic device of the present invention;
Fig. 3 is the first example structure figure of a kind of diagnostic device of the present invention;
Fig. 4 is the second example structure figure of a kind of diagnostic device of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In embodiments of the present invention, executive agent can be diagnostic device, and wherein, diagnostic device can be automotive diagnostic installation.
Referring to Fig. 1, is the first embodiment schematic flow sheet of the upgrade method of a kind of diagnostic device of the present invention.As shown in Figure 1, the upgrade method of a kind of diagnostic device described in the present embodiment comprises step:
S100, the upgrade file that the opertaing device that reception is connected with diagnostic device sends and ciphertext.
In embodiments of the present invention, diagnostic device can be the automotive diagnostic installation for diagnosing technical condition of vehicle.Namely diagnostic device can find out trouble location and the reason of automobile, comprises the Detection and diagnosis of motor car engine, the Detection and diagnosis of automobile chassis, the detection etc. of the Detection and diagnosis of body of a motor car and annex and automobile exhaust contaminant and noise.Wherein, be loaded with program of lower computer under in diagnostic device, this program of lower computer is the kernel program communicated with the ECU of automobile (Electronic Control Unit, electronic control unit), and diagnostic device carries out vehicle diagnosis mainly through program of lower computer.
In embodiments of the present invention, opertaing device can be the host computer be connected with diagnostic device, when user need upgrade the program of lower computer of diagnostic device, when supporting the diagnosis of new automobile to make diagnostic device, host computer can be connected with diagnostic device by user, and by host computer, upgrade file is downloaded to diagnostic device, thus program of lower computer renewal is carried out to diagnostic device, upgrading.
In embodiments of the present invention, host computer can be encrypted the upgrade file that diagnostic device carries out program of lower computer renewal, obtains ciphertext, and upgrade file and ciphertext are sent to diagnostic device.Wherein, host computer can adopt cryptographic algorithm to be encrypted upgrade file, and cryptographic algorithm can comprise symmetric encipherment algorithm or rivest, shamir, adelman etc.Wherein, in a symmetric encryption algorithm, data transmission side will expressly (raw data) and encryption key together after special cryptographic algorithm process, make it become complicated encrypted cipher text and send.After destination receives ciphertext, understand original text if want, then need to use the key of encryption and the algorithm for inversion of identical algorithms to be decrypted ciphertext, it just can be made to revert to readable plaintext.In a symmetric encryption algorithm, the key of use only has one, and send out collection of letters both sides and all use these double secret key data to encrypt and decrypt, this will ask decryption side must know encryption key in advance.In rivest, shamir, adelman, need two keys, PKI and private key, PKI and private key are a pair, if be encrypted data with PKI, only had and could decipher with corresponding private key; If be encrypted data with private key, so only had and could decipher with corresponding PKI.
Preferably, in embodiments of the present invention, host computer can adopt rivest, shamir, adelman to be encrypted upgrade file.Concrete, can be, first, host computer can be compiled into binary file to the program of lower computer that will upgrade, obtain upgrade file, such as: host computer can use IAR EmbeddedWorkbench IDE composing software to compile the program of lower computer that will upgrade, generate slave computer BIN file, wherein, slave computer BIN file can called after Download.bin.We are understandable that, Download.bin file can be upgrade file.After host computer obtains upgrade file, host computer can use private key to the upgrade file encryption generated, generating ciphertext.Wherein, host computer uses private key to the upgrade file encryption generated, generating ciphertext can be: first, host computer can adopt MD5 (Message DigestAlgorithm, Message Digest Algorithm 5) algorithm calculates upgrade file, obtains digest value, secondly, host computer can use private key and adopt RSA Algorithm to calculate digest value, obtains ciphertext.In a particular application, can be, first, host computer can adopt MD5 algorithm to calculate Download.bin file, the digest value obtained is labeled as DigestData_A, secondly, host computer uses private key to carry out RSA Algorithm calculating to DigestData_A, acquisition ciphertext tokens is SignatureData_A, finally, SignatureData_A is added into Download.bin end-of-file by host computer, thus generates the file comprising ciphertext and upgrade file, and this file is labeled as Download_s.bin.Wherein, ciphertext can be digital signature, and private key can be undertaken preset by terminal user.Further, MD5 algorithm is the widely used a kind of hash function of computer safety field, in order to provide the integrity protection of message.The algorithm that RSA Algorithm is proposed together by Peter Lonard Lee Vista (RonRivest), A Di Shamir (Adi Shamir) and Leonard A Deman (Leonard Adleman) is a kind of cryptographic algorithm.
In embodiments of the present invention, when host computer need carry out transmission upgrade file and ciphertext to diagnostic device, first host computer can send to diagnostic device and enter diagnostic device request.Such as: host computer can send to diagnostic device the BOOT entry request entering diagnostic device, diagnostic device is entered with request, wherein, BOOT can be Bootloader program, for initialization diagnostic device, carries out the work such as safety verification, upgrading program of lower computer.When host computer enters diagnostic device success, host computer can send the request of upgrading program of lower computer to diagnostic device; When host computer enter diagnostic device unsuccessful time, then upgrading master computer diagnostic device failure, exit updating operation.When host computer allows the program of lower computer of upgrading diagnostic device, host computer can send upgrade file and ciphertext to diagnostic device.Such as: host computer can send Download_s.bin file to diagnostic device; When host computer is not allowed to the program of lower computer of upgrading diagnostic device, then upgrading master computer diagnostic device failure, exits updating operation.When host computer sends after upgrade file and ciphertext terminate, host computer can send upgrade file to diagnostic device and be sent instruction, and with indication diagnosis device file to be sent completely, diagnostic device can carry out next step operation.Wherein, in the process that host computer sends upgrade file and ciphertext, when occurring communicating interrupt or exception, the failure of upgrading master computer diagnostic device, exits updating operation.
In embodiments of the present invention, when diagnostic device receive host computer send ciphertext and upgrade file after, ciphertext and upgrade file can be stored in the operation of temporary buffer products for further by diagnostic device.
According to described ciphertext, S101, judges that whether described upgrade file is legal.
In embodiments of the present invention, when diagnostic device receives upgrade file and ciphertext, diagnostic device can be verified ciphertext, judges that whether described ciphertext is legal.Wherein, when the ciphertext of host computer encryption is that when adopting private key to be encrypted, diagnostic device can use public-key and to verify ciphertext, and judges whether ciphertext is proved to be successful, and when the authentication succeeds, determines that the upgrade file that diagnostic device receives is legal.Wherein, diagnostic device adopts PKI to verify ciphertext, first, diagnostic device can adopt Predistribution Algorithm to obtain the first digest value, secondly, diagnostic device can use public-key, and adopts decipherment algorithm to ciphertext and the checking of the first digest value, when cryptogram validation success, diagnostic file can determine that upgrade file is legal.Wherein, Predistribution Algorithm can be MD2 algorithm, MD4 algorithm and MD5 algorithm etc.Decipherment algorithm can be RSA Algorithm, ElGamal algorithm, Miller-Rabin algorithm and Diffie-Hellman algorithm etc.
S102, when described upgrade file is legal, upgrades to described diagnostic device according to described upgrade file.
In embodiments of the present invention, when diagnostic device judges that upgrade file is legal, the upgrade file leaving temporary buffer in can be written in flash by diagnostic device, and upgrades.When diagnostic device judges that upgrade file is illegal, the upgrade file leaving temporary buffer in can be deleted by diagnostic device, and diagnostic device is upgraded unsuccessfully.
In the invention process, diagnostic device receives the upgrade file and ciphertext that the opertaing device that is connected with diagnostic device sends, judge that whether described upgrade file is legal according to described ciphertext, and when described upgrade file is legal, according to described upgrade file, described diagnostic device is upgraded, this can ensure the legitimacy of the file run in diagnostic device and the completing property of file, diagnostic device can be stablized more and safe operation.
Referring to Fig. 2, is the second embodiment schematic flow sheet of the upgrade method of a kind of diagnostic device of the present invention.As shown in Figure 2, the upgrade method of a kind of diagnostic device described in the present embodiment comprises step:
S200, the upgrade file that the opertaing device that reception is connected with diagnostic device sends and ciphertext.
S201, adopts Predistribution Algorithm to calculate described upgrade file, obtains the first digest value.
In embodiments of the present invention, Predistribution Algorithm can be MD2 algorithm, MD4 algorithm and MD5 algorithm etc., and preferably, Predistribution Algorithm can be MD5 algorithm.In a particular application, diagnostic device can adopt MD5 algorithm to calculate Download.bin file, and result of calculation is labeled as DigestData_B.
S202, uses described PKI, adopts decipherment algorithm to verify described ciphertext and described first digest value.
In embodiments of the present invention, decipherment algorithm can be RSA Algorithm, ElGamal algorithm, Miller-Rabin algorithm and Diffie-Hellman algorithm etc., and preferably, decipherment algorithm can be RSA Algorithm.In a particular application, diagnostic device can use public-key, RSA Algorithm is adopted to verify the ciphertext SignatureData_A received and the first digest value, wherein, adopt RSA Algorithm to be verified as prior art to the ciphertext SignatureData_A received and the first digest value, no longer repeat at this.
S203, when described cryptogram validation success, determines that described upgrade file is legal.
S204, when described upgrade file is legal, upgrades to described diagnostic device according to described upgrade file.
In embodiments of the present invention, the embodiment of step S200 and step S204 see the embodiment of the step S100 of above embodiment and step S102, no longer can repeat at this.
In the invention process, diagnostic device receives the upgrade file and ciphertext that the opertaing device that is connected with diagnostic device sends, judge that whether described upgrade file is legal according to described ciphertext, and when described upgrade file is legal, according to described upgrade file, described diagnostic device is upgraded, this can ensure the legitimacy of the file run in diagnostic device and the completing property of file, diagnostic device can be stablized more and safe operation.
See Fig. 3, it is the first example structure schematic diagram of a kind of diagnostic device of the embodiment of the present invention.Diagnostic device described in the present embodiment, comprising:
Receiving element 100, for receiving the upgrade file and ciphertext that the opertaing device that is connected with diagnostic device sends.
According to described ciphertext, judging unit 200, for judging that whether described upgrade file is legal.
Upgrade unit 300, for when described upgrade file is legal, upgrades to described diagnostic device according to described upgrade file.
In embodiments of the present invention, diagnostic device can be the automotive diagnostic installation for diagnosing technical condition of vehicle.Namely diagnostic device can find out trouble location and the reason of automobile, comprises the Detection and diagnosis of motor car engine, the Detection and diagnosis of automobile chassis, the detection etc. of the Detection and diagnosis of body of a motor car and annex and automobile exhaust contaminant and noise.Wherein, be loaded with program of lower computer under in diagnostic device, this program of lower computer is the kernel program communicated with the ECU of automobile (Electronic Control Unit, electronic control unit), and diagnostic device carries out vehicle diagnosis mainly through program of lower computer.
In embodiments of the present invention, opertaing device can be the host computer be connected with diagnostic device, when user need upgrade the program of lower computer of diagnostic device, when supporting the diagnosis of new automobile to make diagnostic device, host computer can be connected with diagnostic device by user, and by host computer, upgrade file is downloaded to diagnostic device, thus program of lower computer renewal is carried out to diagnostic device, upgrading.
In embodiments of the present invention, host computer can be encrypted the upgrade file that diagnostic device carries out program of lower computer renewal, obtains ciphertext, and upgrade file and ciphertext are sent to diagnostic device.Wherein, host computer can adopt cryptographic algorithm to be encrypted upgrade file, and cryptographic algorithm can comprise symmetric encipherment algorithm or rivest, shamir, adelman etc.Wherein, in a symmetric encryption algorithm, data transmission side will expressly (raw data) and encryption key together after special cryptographic algorithm process, make it become complicated encrypted cipher text and send.After destination receives ciphertext, understand original text if want, then need to use the key of encryption and the algorithm for inversion of identical algorithms to be decrypted ciphertext, it just can be made to revert to readable plaintext.In a symmetric encryption algorithm, the key of use only has one, and send out collection of letters both sides and all use these double secret key data to encrypt and decrypt, this will ask decryption side must know encryption key in advance.In rivest, shamir, adelman, need two keys, PKI and private key, PKI and private key are a pair, if be encrypted data with PKI, only had and could decipher with corresponding private key; If be encrypted data with private key, so only had and could decipher with corresponding PKI.
Preferably, in embodiments of the present invention, host computer can adopt rivest, shamir, adelman to be encrypted upgrade file.Concrete, can be, first, host computer can be compiled into binary file to the program of lower computer that will upgrade, obtain upgrade file, such as: host computer can use IAR EmbeddedWorkbench IDE composing software to compile the program of lower computer that will upgrade, generate slave computer BIN file, wherein, slave computer BIN file can called after Download.bin.We are understandable that, Download.bin file can be upgrade file.After host computer obtains upgrade file, host computer can use private key to the upgrade file encryption generated, generating ciphertext.Wherein, host computer uses private key to the upgrade file encryption generated, generating ciphertext can be: first, host computer can adopt MD5 (Message DigestAlgorithm, Message Digest Algorithm 5) algorithm calculates upgrade file, obtains digest value, secondly, host computer can use private key and adopt RSA Algorithm to calculate digest value, obtains ciphertext.In a particular application, can be, first, host computer can adopt MD5 algorithm to calculate Download.bin file, the digest value obtained is labeled as DigestData_A, secondly, host computer uses private key to carry out RSA Algorithm calculating to DigestData_A, acquisition ciphertext tokens is SignatureData_A, finally, SignatureData_A is added into Download.bin end-of-file by host computer, thus generates the file comprising ciphertext and upgrade file, and this file is labeled as Download_s.bin.Wherein, ciphertext can be digital signature, and private key can be undertaken preset by terminal user.Further, MD5 algorithm is the widely used a kind of hash function of computer safety field, in order to provide the integrity protection of message.The algorithm that RSA Algorithm is proposed together by Peter Lonard Lee Vista (RonRivest), A Di Shamir (Adi Shamir) and Leonard A Deman (Leonard Adleman) is a kind of cryptographic algorithm.
In embodiments of the present invention, when host computer need carry out transmission upgrade file and ciphertext to diagnostic device, first host computer can send to diagnostic device and enter diagnostic device request.Such as: host computer can send to diagnostic device the BOOT entry request entering diagnostic device, diagnostic device is entered with request, wherein, BOOT can be Bootloader program, for initialization diagnostic device, carries out the work such as safety verification, upgrading program of lower computer.When host computer enters diagnostic device success, host computer can send the request of upgrading program of lower computer to diagnostic device; When host computer enter diagnostic device unsuccessful time, then upgrading master computer diagnostic device failure, exit updating operation.When host computer allows the program of lower computer of upgrading diagnostic device, host computer can send upgrade file and ciphertext to diagnostic device.Such as: host computer can send Download_s.bin file to diagnostic device; When host computer is not allowed to the program of lower computer of upgrading diagnostic device, then upgrading master computer diagnostic device failure, exits updating operation.When host computer sends after upgrade file and ciphertext terminate, host computer can send upgrade file to diagnostic device and be sent instruction, and with indication diagnosis device file to be sent completely, diagnostic device can carry out next step operation.Wherein, in the process that host computer sends upgrade file and ciphertext, when occurring communicating interrupt or exception, the failure of upgrading master computer diagnostic device, exits updating operation.
In embodiments of the present invention, when receiving element 100 receive host computer send ciphertext and upgrade file after, ciphertext and upgrade file can be stored in the operation of temporary buffer products for further by receiving element 100.
In embodiments of the present invention, when receiving element 100 receives upgrade file and ciphertext, judging unit 200 can be verified ciphertext, judges that whether described ciphertext is legal.Wherein, when the ciphertext of host computer encryption is that when adopting private key to be encrypted, judging unit 200 can use public-key and to verify ciphertext, and judges whether ciphertext is proved to be successful, and when the authentication succeeds, determines that the upgrade file that diagnostic device receives is legal.Wherein, judging unit 200 adopts PKI to verify ciphertext, first, judging unit 200 can adopt Predistribution Algorithm to obtain the first digest value, secondly, judging unit 200 can use public-key, and adopts decipherment algorithm to ciphertext and the checking of the first digest value, when cryptogram validation success, diagnostic file can determine that upgrade file is legal.Wherein, Predistribution Algorithm can be MD2 algorithm, MD4 algorithm and MD5 algorithm etc.Decipherment algorithm can be RSA Algorithm, ElGamal algorithm, Miller-Rabin algorithm and Diffie-Hellman algorithm etc.
In embodiments of the present invention, when judging unit 200 judges that upgrade file is legal, the upgrade file leaving temporary buffer in can be written in flash by upgrade unit 300, and upgrades.When judging unit 200 judges that upgrade file is illegal, the upgrade file leaving temporary buffer in can be deleted by diagnostic device, and diagnostic device is upgraded unsuccessfully.
In the invention process, diagnostic device receives the upgrade file and ciphertext that the opertaing device that is connected with diagnostic device sends, judge that whether described upgrade file is legal according to described ciphertext, and when described upgrade file is legal, according to described upgrade file, described diagnostic device is upgraded, this can ensure the legitimacy of the file run in diagnostic device and the completing property of file, diagnostic device can be stablized more and safe operation.
See Fig. 4, it is the second example structure schematic diagram of a kind of diagnostic device of the embodiment of the present invention.Diagnostic device described in the present embodiment, comprising:
Receiving element 400, for receiving the upgrade file and ciphertext that the opertaing device that is connected with diagnostic device sends.
According to described ciphertext, judging unit 500, for judging that whether described upgrade file is legal.
Upgrade unit 600, for when described upgrade file is legal, upgrades to described diagnostic device according to described upgrade file.
Delete cells 700, for when described ciphertext is unsuccessful, deletes described upgrade file.
Wherein, described judging unit 500 specifically for:
Pre-arranged public is used to verify described ciphertext;
When described cryptogram validation success, determine that described upgrade file is legal.
Wherein, described judging unit 500 specifically for:
Adopt Predistribution Algorithm to calculate described upgrade file, obtain the first digest value;
Use described PKI, adopt decipherment algorithm to verify described ciphertext and described first digest value.
Wherein, described ciphertext comprises digital signature.
In embodiments of the present invention, Predistribution Algorithm can be MD2 algorithm, MD4 algorithm and MD5 algorithm etc., and preferably, Predistribution Algorithm can be MD5 algorithm.In a particular application, judging unit 500 can adopt MD5 algorithm to calculate Download.bin file, and result of calculation is labeled as DigestData_B.
In embodiments of the present invention, decipherment algorithm can be RSA Algorithm, ElGamal algorithm, Miller-Rabin algorithm and Diffie-Hellman algorithm etc., and preferably, decipherment algorithm can be RSA Algorithm.In a particular application, judging unit 500 can use public-key, RSA Algorithm is adopted to verify the ciphertext SignatureData_A received and the first digest value, wherein, judging unit 500 adopts RSA Algorithm to be verified as prior art to the ciphertext SignatureData_A received and the first digest value, no longer repeats at this.
In embodiments of the present invention, when judging unit 500 pairs of cryptogram validation successes, judging unit 500 can determine that received upgrade file is legal.
Wherein, be understandable that, the function of each functional module of the present embodiment also according to the associated description with reference to above-described embodiment, no longer can repeat herein.
In the invention process, diagnostic device receives the upgrade file and ciphertext that the opertaing device that is connected with diagnostic device sends, judge that whether described upgrade file is legal according to described ciphertext, and when described upgrade file is legal, according to described upgrade file, described diagnostic device is upgraded, this can ensure the legitimacy of the file run in diagnostic device and the completing property of file, diagnostic device can be stablized more and safe operation.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above disclosedly be only present pre-ferred embodiments, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (8)
1. a upgrade method for diagnostic device, is characterized in that, described method comprises:
The upgrade file that the opertaing device that reception is connected with diagnostic device sends and ciphertext;
Judge that whether described upgrade file is legal according to described ciphertext;
When described upgrade file is legal, according to described upgrade file, described diagnostic device is upgraded.
2. the method for claim 1, is characterized in that, describedly judges that whether described upgrade file is legal according to described ciphertext and comprises:
Pre-arranged public is used to verify described ciphertext;
When described cryptogram validation success, determine that described upgrade file is legal.
3. method as claimed in claim 2, is characterized in that, described in use public-key and checking is carried out to described ciphertext comprise:
Adopt Predistribution Algorithm to calculate described upgrade file, obtain the first digest value;
Use described PKI, adopt decipherment algorithm to verify described ciphertext and described first digest value.
4. method as claimed in claim 3, it is characterized in that, described method also comprises:
When described ciphertext is unsuccessful, delete described upgrade file.
5. a diagnostic device, is characterized in that, described equipment comprises:
Receiving element, for receiving the upgrade file and ciphertext that the opertaing device that is connected with diagnostic device sends;
According to described ciphertext, judging unit, for judging that whether described upgrade file is legal;
Upgrade unit, for when described upgrade file is legal, upgrades to described diagnostic device according to described upgrade file.
6. equipment as claimed in claim 5, it is characterized in that, described judging unit comprises:
First checking subelement, verifies described ciphertext for using pre-arranged public;
Determine subelement, for when described cryptogram validation is successful, determine that described upgrade file is legal.
7. equipment as claimed in claim 6, is characterized in that, described first checking subelement comprises:
Computation subunit, for adopting Predistribution Algorithm to calculate described upgrade file, obtains the first digest value;
Second checking subelement, for using described PKI, adopts decipherment algorithm to verify described ciphertext and described first digest value.
8. equipment as claimed in claim 7, it is characterized in that, described equipment also comprises:
Delete cells, for when described ciphertext is unsuccessful, deletes described upgrade file.
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| CN201410855503.7A CN104732138A (en) | 2014-12-31 | 2014-12-31 | Diagnostic equipment upgrading method and diagnostic equipment |
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| CN107704756A (en) * | 2017-09-26 | 2018-02-16 | 晶晨半导体(上海)股份有限公司 | Safe checking method and system before a kind of system upgrade |
| CN108124491A (en) * | 2017-12-28 | 2018-06-05 | 深圳市元征软件开发有限公司 | Diagnosis connector upgrading verification method, device and the diagnosis connector of diagnostic device |
| CN108255535A (en) * | 2016-12-28 | 2018-07-06 | 乐视汽车（北京）有限公司 | Vehicle device upgrade method and vehicle device |
| CN113515747A (en) * | 2021-05-17 | 2021-10-19 | 深圳市友华通信技术有限公司 | Equipment upgrading method, device, equipment and storage medium |
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Application publication date: 20150624 |