CN111651733A - Off-line checking method for validity period of license - Google Patents
Off-line checking method for validity period of license Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 66
- 238000012795 verification Methods 0.000 claims abstract description 44
- 230000004913 activation Effects 0.000 claims description 72
- 230000008569 process Effects 0.000 claims description 42
- 230000008676 import Effects 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006855 networking Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
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- 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]
- G06F21/105—Arrangements for software license management or administration, e.g. for managing licenses at corporate level
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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
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
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Abstract
The invention relates to the field of license verification, in particular to an offline verification method for the validity period of a license. The method comprises the following steps: step S1, the local device acquires the license file generated by the license server and judges whether the license file passes the verification; step S2, operating the license file, generating an operating duration file according to the accumulated operating duration of the license, and carrying out self-checking encryption on the operating duration file to generate an encrypted operating duration file; step S3, judging whether the running time of the license file exceeds the permitted time of the license file according to the running time file; step S4, determining whether the system time of the local device exceeds the permitted time of the license according to the running time length file. The beneficial effects of the above technical scheme are: the running time length file is generated through self-checking encryption, so that the running time length file has the functions of tamper resistance and clone resistance, and cannot be restored to the original state through backup, and the offline checking of the validity period of the license is realized.
Description
Technical Field
The invention relates to the field of license verification, in particular to an offline verification method for the validity period of a license.
Background
In recent years, in order to guarantee the copyright of the application software, more and more application software limits the user's usage right by a license authentication method. The current licenses are generally divided into two types, one is a permanent license, the other is a temporary license, the temporary license can authorize a user to log in and use within a preset time, and most enterprise users tend to try out and purchase based on business policies, so that the application range of the temporary license is wider.
Since the temporary license needs to implement the software authorization function within the preset time, the license needs to configure a control policy of the corresponding license time. Licenses are based primarily on both relative time and absolute time control strategies. The existing checking method usually accumulates the running time of the license periodically during the running of the system, and simultaneously periodically compares the running time of the license to judge whether the system time of the local machine is within the allowed time limit of the license so as to finish the time-based policy control.
However, when the activation of the license fails, if the system time of the local computer is modified within the valid period of the license, and the license running time file is backed up at the same time, the running time file is restored to the initial state, which will cause the license which has failed to be activated again, thereby causing commercial loss.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an offline checking method of the validity period of a license, which is characterized by comprising the following procedures:
step S1, the local device acquires the license file generated by the license server, and determines whether the license file passes the verification:
if so, the license file is successfully activated, and then go to step S2;
if not, the license file fails to be activated, and then the process is exited;
step S2, the local device runs the license file, generates a running time length file of the license file according to the accumulated running time length of the license, and performs self-checking encryption on the running time length file to generate the encrypted running time length file;
step S3, the local device determines, according to the running time length file, whether the running time length of the license file exceeds the license time length of the license file:
if yes, the license file is expired, and then the process is exited;
if not, go to step S4;
step S4, the local device determines, according to the running duration file, whether the system time of the local device exceeds the license permitted time:
if yes, the license file is expired, and then the process is exited;
if not, the license file is not expired, and then the process is exited.
Preferably, step S2 includes:
step S21, the local device runs the license file, and obtains the periodic running duration of the license in the period in a preset period, and performs an accumulation calculation to obtain the accumulated running duration of the license;
step S22, the local device generates the running time file according to the accumulated running time;
step S23, carrying out self-checking encryption on the operation duration file to generate the encrypted operation duration file, wherein the operation duration file corresponds to the current period;
in step S24, the local device deletes the running time file corresponding to the previous cycle, and then goes to step S21.
Preferably, the period of operation time in step S21 is expressed by the following formula:
ti＝t′-ti-1
wherein the content of the first and second substances,
tithe cycle running time length in the current cycle is represented;
t' is used for representing the system time of the local device;
ti-1and the cycle running time length corresponding to the last cycle is represented.
Preferably, the process of performing self-checking encryption on the operation duration file in step S23 includes:
step S231, the local device carries out self-checking encryption according to the file attribute of the running time length file to generate a time length check code;
in step S232, the local device adds the duration check code to the running duration file, and then goes to step S24.
Preferably, the file attribute includes a file identification number and a file creation time.
Preferably, the file attribute includes a file identification number and a file modification time.
Preferably, step S1 includes:
step S11, the local device acquires the hardware file and the activation code file in the local device, encrypts the activation code file, and exports the hardware file and the encrypted activation code file;
step S12, the license server imports the hardware file and the activation code file, and generates a license file by signing;
step S13, the local device imports the license file, and determines whether the license file passes the verification according to the hardware file and the activation code file:
if so, the license file is successfully activated, and then go to step S2;
if not, the license file fails to be activated, and then the process is exited.
Preferably, the encryption process in step S11 includes:
step S111, the local equipment acquires the file attribute of the activation code file;
step S112, the local equipment carries out self-checking encryption according to the file attribute of the activation code file to generate a first check code;
step S113, the local device adds the first check code to the activation code file, and generates the encrypted activation code file.
Preferably, step S13 includes:
step S131, the local device imports the license file;
step S132, the local device determines whether the license file and the hardware file in the local device pass the matching check:
if yes, go to step S133;
if not, the license file fails to be activated, and then the process is exited;
step S133, the local device determines whether the activate code file exists in the local device:
if yes, go to step S134;
if not, the license file fails to be activated, and then the process is exited;
step S134, the local device determines whether the activate code file in the local device passes the validity check:
if yes, go to step S135;
if not, the license file fails to be activated, and then the process is exited;
step S135, the local device determines whether the license file and the activation code file in the local device pass matching verification:
if so, the license file is successfully activated, and then go to step S2;
if not, the license file fails to be activated, and then the process is exited.
Preferably, the step S134 includes:
step S1341, the local equipment performs self-checking encryption according to the activation code file before encryption in the local equipment to generate a verification activation code file;
step S1342, the local device determines whether the encrypted activation code file in the local device is consistent with the verification activation code file:
if yes, go to step S135;
if not, the license file fails to be activated, and then the process is exited.
The beneficial effects of the above technical scheme are: the running time length file is generated through self-checking encryption, so that the running time length file has the functions of tamper resistance and clone resistance, and cannot be restored to the original state through backup, and the offline checking of the validity period of the license is realized.
Drawings
FIG. 1 is a schematic general flow chart of a preferred embodiment of the present invention;
FIG. 2 is a flow chart of step S2 in a preferred embodiment of the present invention;
FIG. 3 is a flowchart of step S23 in a preferred embodiment of the present invention;
FIG. 4 is a flowchart of step S1 in a preferred embodiment of the present invention;
FIG. 5 is a flowchart of step S11 in a preferred embodiment of the present invention;
FIG. 6 is a flowchart of step S13 in a preferred embodiment of the present invention;
FIG. 7 is a flowchart illustrating step S134 in a preferred embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
An off-line verification method for validity period of a license is shown in fig. 1, and includes the following procedures:
step S1, the local device acquires the license file generated by the license server, and determines whether the license file passes the verification:
if so, the license file is successfully activated, and then go to step S2;
if not, the license file fails to be activated, and then the process is quitted;
step S2, the local device runs the license file and generates the running time length file of the license file according to the accumulated running time length of the license, and the running time length file is self-checked and encrypted to generate an encrypted running time length file;
step S3, the local device determines whether the running time of the license file exceeds the permitted time of the license file according to the running time file:
if yes, the license file is overdue, and then the process is exited;
if not, go to step S4;
step S4, the local device determines whether the system time of the local device exceeds the permitted time of the license according to the running time length file:
if yes, the license file is overdue, and then the process is exited;
if not, the license file is not expired, and then the process is exited.
Specifically, considering that in the prior art, the license verification policy is usually circumvented by modifying the system time of the local device to be within the allowed time period of the license, and therefore, after the license file is successfully activated in step S1, step S2 generates the running time file corresponding to the license file by the local device, and the running time file is used to perform timing monitoring on the validity period of the license, however, the running time file not only needs to be tamper-resistant, but also needs to be clone-resistant, so as to avoid the situation that the license file is infinitely recovered after being invalid due to the backup of the running time file, and therefore, after the running time file is generated, the running time file needs to be self-verified and encrypted to generate a time verification code, and the time verification code is added to the running time file, so that the encrypted running time file can be obtained, and then the time verification code is added to the running time file, the method and the device can prevent the validity period of the license file from being verified due to the fact that the running time length file is infinitely cloned.
Further, after the local device acquires the tamper-resistant and clone-resistant running time length file, the validity period of the license is verified by judging whether the running time length of the license exceeds the permission time length of the license and judging whether the system time of the local device exceeds the permission time length of the license.
Further, considering that the license validation in the prior art usually utilizes the execution time of the network component to determine the validity period of the license, so as to limit the determination process to the networking situation, but neglects the device offline and network failure situations, the introduction, activation, verification, and generation, encryption, and determination of the runtime file of the license file in steps S1-S4 in the present technical solution can implement the time policy control verification of the license in the offline situation, so as to avoid the phenomenon that the validity period of the license file cannot be verified due to the device offline, network failure, and networking failure evaded.
In a preferred embodiment of the present invention, as shown in fig. 2, step S2 includes:
step S21, the local device runs the license file, and obtains the periodic running time of the license in the period according to the preset period, and the accumulated running time of the license is obtained by accumulation calculation;
step S22, the local device generates an operation duration file according to the accumulated operation duration;
step S23, carrying out self-checking encryption on the operation duration file to generate an encrypted operation duration file, wherein the operation duration file corresponds to the current period;
in step S24, the local device deletes the running time file corresponding to the previous cycle, and then goes to step S21.
Specifically, in the running process of the license file, the validity period of the license file needs to be checked, so that the running time in the period is obtained in a preset period, the accumulated running time is obtained through accumulation calculation, then the running time file is generated according to the accumulated running time and the system time of the local device, self-checking encryption is performed according to the file attribute to generate a time length check code, the time length check code is added to the running time file to form an encrypted running time file, and the running time file at the moment can achieve the functions of tamper resistance and clone resistance.
Further, after the operation time length file after the self-checking encryption is generated, the operation time length file is encrypted, so that the safety of the operation time length file is improved.
Further, after the operation duration file corresponding to the current period is generated, the operation duration file corresponding to the previous period is deleted, and even if the content of the operation duration file in the initial state is backed up, the operation duration file cannot be restored to the initial state through the content of the overlay file.
In a preferred embodiment of the present invention, the period of operation time in step S21 is represented by the following formula:
ti＝t′-ti-1(1)
wherein the content of the first and second substances,
tithe system is used for representing the period running time in the current period;
t' is used to represent the system time of the local device;
ti-1which is used to represent the period operation duration corresponding to the last period.
Specifically, the accumulated running time in the running time file generated in the previous period is read by taking the preset period as a unit for calculation, and the periodic running time corresponding to the current period is generated by combining the system time in the local device, so that the local device can conveniently and accurately acquire the accumulated running time of the license in time, a new running time file is generated, and the validity period check accuracy of the license is improved.
In a preferred embodiment of the present invention, as shown in fig. 3, the process of performing self-checking encryption on the running time length file in step S23 includes:
step S231, the local device carries out self-checking encryption according to the file attribute of the running time length file to generate a time length check code;
in step S232, the local device adds the duration check code to the running duration file, and then goes to step S24.
In a preferred embodiment of the present invention, the file attribute includes a file identification number and a file creation time.
In a preferred embodiment of the present invention, the file attribute includes a file identification number and a file modification time.
Further, in a preferred embodiment of the present invention, a hash algorithm is used for self-checking encryption.
Specifically, the local equipment performs self-checking encryption according to the file attribute of the running time length file to generate a time length check code, the file attribute comprises the file identification number and the file creation time of the running time length file, the last modification time of the file can be used as the file attribute for encryption when the file is modified, and the unidirectional property and the attack resistance of a hash algorithm are considered, so that the hash algorithm can be adopted for encryption in the self-checking encryption process to improve the safety and the stability of the running time length file.
Further, in the process of self-checking encryption according to the running time length file, a key field can be set, a hash algorithm is adopted to encrypt the file attribute and the key field to generate a time length check code, and even if the algorithm is leaked, the same time length check code cannot be counterfeited.
Further, the running time length file adopted by the local device for judging the validity of the license file comprises not only the self-checking encrypted time length check code, but also the accumulated running time length and the system time. The method and the device have the advantages that if the operation duration file only has the duration check code, when the license file is failed to be activated, the operation duration file in the initial activation state of the license file can be restored by backing up the initially activated operation duration file and covering the initially activated operation duration file to the current operation duration file, and therefore time check of the license is avoided.
In a preferred embodiment of the present invention, as shown in fig. 4, step S1 includes:
step S11, the local equipment acquires the hardware file and the activation code file in the local equipment, encrypts the activation code file and exports the hardware file and the encrypted activation code file;
step S12, the license server imports the hardware file and the activation code file, and generates a license file by signing;
step S13, the local device imports the license file, and determines whether the license file passes the verification according to the hardware file and the activation code file:
if so, the license file is successfully activated, and then go to step S2;
if not, the license file activation fails, and then the process exits.
Specifically, before the local device runs the license file, the license file needs to be acquired, and then the license file is verified, and only if the license file successfully activated through verification is used by the local device, the local device can run the license file. In order to improve the accuracy of offline verification of the license, the activation code file in the local equipment is encrypted, the hardware file and the encrypted activation code file are exported, the license server imports the hardware file and the activation code file and carries out signature to generate a license file, finally the local equipment imports the license file, and whether the license file passes the verification or not is judged according to the hardware file and the activation code file.
Furthermore, after the license file is successfully activated, the activation code file is deleted, and because the encrypted activation code file has the characteristics of tamper resistance and counterfeit prevention, the same activation code file cannot be generated after deletion, so that one activation code corresponds to one import activation of the license, the license is only allowed to be imported and activated once, and the repeated import activation of the license file is avoided.
In a preferred embodiment of the present invention, as shown in fig. 5, the encryption process in step S11 includes:
step S111, the local equipment acquires the file attribute of the activation code file;
step S112, the local equipment carries out self-checking encryption according to the file attribute of the activation code file to generate a first check code;
and step S113, adding the first check code into the activation code file by the local equipment to generate an encrypted activation code file.
Specifically, the local device performs self-checking encryption on the activation code file through the steps S111 to S113, generates the encrypted activation code file, and exports the activation code file to the license file, so that the validity check accuracy of the license file can be improved.
In a preferred embodiment of the present invention, as shown in fig. 6, step S13 includes:
step S131, the local device imports the license file;
step S132, the local device judges whether the license file and the hardware file in the local device pass the matching check:
if yes, go to step S133;
if not, the license file fails to be activated, and then the process is quitted;
step S133, the local device determines whether an activation code file exists in the local device:
if yes, go to step S134;
if not, the license file fails to be activated, and then the process is quitted;
step S134, the local device judges whether the activation code file in the local device passes the validity check:
if yes, go to step S135;
if not, the license file fails to be activated, and then the process is quitted;
step S135, the local device judges whether the license file and the activation code file in the local device pass the matching check:
if so, the license file is successfully activated, and then go to step S2;
if not, the license file activation fails, and then the process exits.
Specifically, in the process of activating the license file by the local device, the hardware file and the activation code file in the license file, and the hardware file and the activation code file in the local device need to be matched and checked in sequence.
In a preferred embodiment of the present invention, as shown in fig. 7, step S134 includes:
step S1341, the local equipment performs self-checking encryption according to the activation code file before encryption in the local equipment to generate a verification activation code file;
step S1342, the local device determines whether the encrypted activate code file in the local device is consistent with the verification activate code file:
if yes, go to step S135;
if not, the license file activation fails, and then the process exits.
Specifically, in order to improve the security of the self-check code encryption, a hash algorithm is used to encrypt the file attribute, and in step S341, the native device performs self-check encryption according to the file attribute of the activation code file before encryption in the native device to generate a verification activation code file; in step S322, it is determined whether the encrypted activation code file in the local device is consistent with the verification activation code file, that is, whether the first check code in the encrypted activation code file in the local device is consistent with the verification activation code in the verification activation code file, if not, the license file fails to be activated, and the process exits, if so, the process goes to step S133, and the activation code file in the license file and the activation code file in the local device are subjected to matching verification.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. An off-line checking method for the validity period of a license is characterized by comprising the following procedures:
step S1, the local device acquires the license file generated by the license server, and determines whether the license file passes the verification:
if so, the license file is successfully activated, and then go to step S2;
if not, the license file fails to be activated, and then the process is exited;
step S2, the local device runs the license file, generates a running time length file of the license file according to the accumulated running time length of the license, and performs self-checking encryption on the running time length file to generate the encrypted running time length file;
step S3, the local device determines, according to the running time length file, whether the running time length of the license file exceeds the license time length of the license file:
if yes, the license file is expired, and then the process is exited;
if not, go to step S4;
step S4, the local device determines, according to the running duration file, whether the system time of the local device exceeds the license permitted time:
if yes, the license file is expired, and then the process is exited;
if not, the license file is not expired, and then the process is exited.
2. The off-line verification method according to claim 1, wherein step S2 includes:
step S21, the local device runs the license file, and obtains the periodic running duration of the license in the period in a preset period, and performs an accumulation calculation to obtain the accumulated running duration of the license;
step S22, the local device generates the running time file according to the accumulated running time;
step S23, carrying out self-checking encryption on the operation duration file to generate the encrypted operation duration file, wherein the operation duration file corresponds to the current period;
in step S24, the local device deletes the running time file corresponding to the previous cycle, and then goes to step S21.
3. The off-line verification method according to claim 2, wherein the period of operation time in step S21 is expressed by the following formula:
ti＝t′-ti-1
wherein the content of the first and second substances,
tithe cycle running time length in the current cycle is represented;
t' is used for representing the system time of the local device;
ti-1and the cycle running time length corresponding to the last cycle is represented.
4. The offline verification method according to claim 2, wherein the step S23 of performing self-verification encryption on the runtime duration file includes:
step S231, the local device carries out self-checking encryption according to the file attribute of the running time length file to generate a time length check code;
in step S232, the local device adds the duration check code to the running duration file, and then goes to step S24.
5. The offline verification method of claim 4, wherein said file attributes comprise a file identification number and a file creation time.
6. The offline verification method of claim 4, wherein said file attributes comprise a file identification number and a file modification time.
7. The off-line verification method according to claim 1, wherein step S1 includes:
step S11, the local device acquires the hardware file and the activation code file in the local device, encrypts the activation code file, and exports the hardware file and the encrypted activation code file;
step S12, the license server imports the hardware file and the activation code file, and generates a license file by signing;
step S13, the local device imports the license file, and determines whether the license file passes the verification according to the hardware file and the activation code file:
if so, the license file is successfully activated, and then go to step S2;
if not, the license file fails to be activated, and then the process is exited.
8. The offline verification method according to claim 7, wherein said encryption process in step S11 includes:
step S111, the local equipment acquires the file attribute of the activation code file;
step S112, the local equipment carries out self-checking encryption according to the file attribute of the activation code file to generate a first check code;
step S113, the local device adds the first check code to the activation code file, and generates the encrypted activation code file.
9. The off-line verification method according to claim 7, wherein the step S13 includes:
step S131, the local device imports the license file;
step S132, the local device determines whether the license file and the hardware file in the local device pass the matching check:
if yes, go to step S133;
if not, the license file fails to be activated, and then the process is exited;
step S133, the local device determines whether the activate code file exists in the local device:
if yes, go to step S134;
if not, the license file fails to be activated, and then the process is exited;
step S134, the local device determines whether the activate code file in the local device passes the validity check:
if yes, go to step S135;
if not, the license file fails to be activated, and then the process is exited;
step S135, the local device determines whether the license file and the activation code file in the local device pass matching verification:
if so, the license file is successfully activated, and then go to step S2;
if not, the license file fails to be activated, and then the process is exited.
10. The off-line verification method according to claim 9, wherein the step S134 includes:
step S1341, the local equipment performs self-checking encryption according to the activation code file before encryption in the local equipment to generate a verification activation code file;
step S1342, the local device determines whether the encrypted activation code file in the local device is consistent with the verification activation code file:
if yes, go to step S135;
if not, the license file fails to be activated, and then the process is exited.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113656101A (en) * | 2021-08-17 | 2021-11-16 | 成都长城开发科技有限公司 | Authorization management method, system, server and user side |
| CN115422509A (en) * | 2022-07-18 | 2022-12-02 | 广州中望龙腾软件股份有限公司 | Tamper-proof authorization file generation method, verification method, device and medium |
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| JP2008021021A (en) * | 2006-07-11 | 2008-01-31 | Hitachi Ltd | License authentication method for software |
| CN102495811A (en) * | 2011-12-12 | 2012-06-13 | 创新科软件技术（深圳）有限公司 | Method for generating and validating license and storage equipment |
| CN106874714A (en) * | 2017-02-15 | 2017-06-20 | 湖南长城银河科技有限公司 | A kind of software authorization method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113656101A (en) * | 2021-08-17 | 2021-11-16 | 成都长城开发科技有限公司 | Authorization management method, system, server and user side |
| CN115422509A (en) * | 2022-07-18 | 2022-12-02 | 广州中望龙腾软件股份有限公司 | Tamper-proof authorization file generation method, verification method, device and medium |
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