CN106325202A - Subroutine encrypting method, verifying method and corresponding PLC programming system - Google Patents
Subroutine encrypting method, verifying method and corresponding PLC programming system Download PDFInfo
- Publication number
- CN106325202A CN106325202A CN201610862176.7A CN201610862176A CN106325202A CN 106325202 A CN106325202 A CN 106325202A CN 201610862176 A CN201610862176 A CN 201610862176A CN 106325202 A CN106325202 A CN 106325202A
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- Prior art keywords
- subprogram
- plc
- flag bit
- version number
- upload
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/056—Programming the PLC
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/13—Plc programming
- G05B2219/13004—Programming the plc
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Programmable Controllers (AREA)
Abstract
The invention discloses a subroutine encrypting method which comprises the following steps: choosing the subroutines requiring to be encrypted from a PLC programming and editing device; in the subroutine attribute editing page, encrypting the subroutine, choosing and clicking the item of upload prohibited open; according to whether the item has been chosen and clicked, modifying the flag bits corresponding to the item of upload prohibited open; and downloading the encrypted subroutines and their flag bits into the PLC. The invention also discloses a corresponding verifying method and a PLC programming system. According to the technical schemes of the invention, the security of specifically encrypted subroutines can be increased greatly.
Description
Technical field
The present invention relates to PLC and program field, particularly relate to method, method of calibration and phase that a kind of subroutine is encrypted
The PLC programing system answered.
Background technology
In order to make an engineering with important value can only use on specific PLC, can be in the POU(program groups of PLC
Knit unit) some subprogram in, the step reading specified register (PLC version number) is set, if current PLC is not required
Version, then this sub-Cheng Chengxu performs STOP instruction, makes PLC out of service.
Therefore this STOP instruction, it is necessary in the subprogram of the encryption always called (there is core algorithm than such subprogram, must
Must encrypt), in case user deletes this instruction, thus avoid this subprogram to use on any PLC.
But existing this method there is also weak point, the possibility being cracked due to password existence, therefore this encryption
The safety of subprogram yet suffers from hidden danger.
Summary of the invention
In view of the deficiencies in the prior art, the present invention provides method, the method for calibration that a kind of subroutine is encrypted
And corresponding PLC programing system, the safety of particular encryption subprogram can be greatly improved.
In order to reach foregoing invention purpose, the one side of the embodiment of the present invention provides one and adds PLC subprogram
Close method, comprises the steps:
In PLC program editing machine, select the subprogram needing to be encrypted；
In the described subprogram attributes edit page, described subprogram is encrypted, and chooses " upload and forbid opening "
Option；
Whether choose according to described option, described " upload and the forbid opening " flag bit that option is corresponding of amendment；
Subprogram after described encryption and described flag bit are downloaded in PLC.
Wherein, " upload and forbid opening " step of the flag bit that option is corresponding described in described amendment particularly as follows:
When, in the described subprogram attributes edit page, having chosen " upload and forbid opening " option, then corresponding flag bit has been repaiied
Change into " 1 ", otherwise corresponding flag bit is revised as " 0 ".
Wherein, the subprogram that described needs are encrypted includes the checkout of version number subprogram of PLC and stops son
Program；
Wherein, the checkout of version number subprogram of PLC is used for reading the version number of the current PLC that described subprogram is downloaded to, and
The version number read is compared with the version number of storage in subprogram；
Described stopping subprogram, for when the checkout of version number subprogram comparative result of PLC differs for both, controls to stop
The operation of described PLC.
Wherein, farther include:
Subprogram after described encryption from PLC be uploaded to PLC program editing machine success after, in described subprogram increase " on
Carry successfully " flag bit；
Flag bit corresponding to " uploading and forbid opening " described in the subprogram after described encryption is " 1 ", and described in existence " on
Carry successfully " flag bit, then control to make the content of described subprogram can not be checked and be edited.
Correspondingly, the another aspect of the embodiment of the present invention also provides for a kind of PLC programing system, including:
Subprogram selects unit, in PLC program editing machine, selects the subprogram needing to be encrypted；
Cryptographic processing unit, in the described subprogram attributes edit page, is encrypted described subprogram, and hooks
Choosing " upload and forbid opening " option；
Flag bit amendment unit, whether for choosing according to described option, described " upload and the forbid opening " option of amendment is corresponding
Flag bit；
Download unit, for being downloaded to the subprogram after described encryption and described flag bit in PLC.
Wherein, described flag bit amendment unit revises described " upload and forbid opening " choosing the most in the following manner
The flag bit that item is corresponding:
When, in the described subprogram attributes edit page, having chosen " upload and forbid opening " option, then corresponding flag bit has been repaiied
Change into " 1 ", otherwise corresponding flag bit is revised as " 0 ".
The subprogram that wherein said needs are encrypted includes PLC checkout of version number subprogram and stops sub-journey
Sequence；
Wherein, PLC checkout of version number subprogram is used for reading the version number of the current PLC that described subprogram is downloaded to, and will
The version number read compares with the version number of storage in subprogram；
Described stopping subprogram, for when the checkout of version number subprogram comparative result of PLC differs for both, controls to stop
The operation of described PLC.
Wherein, farther include:
Upload and successfully indicate unit, be uploaded to PLC program editing machine for the subprogram after described encryption being detected from PLC
After merit, described subprogram increases " uploading successfully " flag bit；
Subprogram editor control unit, for the mark corresponding to " upload and forbid opening " described in the subprogram after described encryption
Will position is " 1 ", and there is described " uploading successfully " flag bit, controls to make the content of described subprogram invisible and can not be compiled
Volume；Flag bit corresponding to " uploading and forbid opening " described in the subprogram after described encryption is " 0 ", then control to make described son
The content of program can be checked after decryption and can be edited.
Correspondingly, the another further aspect of the embodiment of the present invention, also provide for a kind of method of verification encryption subprogram in PLC,
Encryption subprogram for being obtained the method using aforementioned subroutine to be encrypted is examined after being downloaded in PLC
Test, comprise the steps:
Run the PLC checkout of version number subprogram in described encryption subprogram, read the version number of current PLC, and will be read
Version number and described encryption subprogram in the version number of storage compare；
When comparative result differs for both, control to stop the operation of described PLC.
Implement the embodiment of the present invention, have the advantages that
The technical scheme that the embodiment of the present invention provides, by arranging, in encryption subprogram, the mark that " upload and forbid opening " is corresponding
Position and " uploading successfully " flag bit, after this subprogram is uploaded, and the flag bit of " upload and forbid opening " correspondence is " 1 "
It is that then this subprogram does not allows to be opened, and cannot view or edit the content of this subprogram on PLC program editing machine, permissible
The subprogram preventing encryption is cracked and is replicated, thus prevents this encryption subprogram from running on unauthorized PLC.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the main flow schematic diagram in one embodiment of method that the subroutine that the present invention provides is encrypted；
Fig. 2 is the surface chart that in Fig. 1, step S12 is corresponding；
Fig. 3 is the surface chart that in Fig. 1, step S19 is corresponding；
Fig. 4 is another surface chart that in Fig. 1, step S19 is corresponding；
Fig. 5 is the structural representation of an embodiment of a kind of PLC programing system that the present invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the invention are referred to explanation.
As it is shown in figure 1, be the main flow of an embodiment of the method that a kind of subroutine that the present invention provides is encrypted
Journey schematic diagram；And please also refer to shown in Fig. 2 to Fig. 4, in this embodiment, the method comprises the steps:
Step S10, in PLC program editing machine, selects the subprogram needing to be encrypted；
Step S12, in the described subprogram attributes edit page, is encrypted described subprogram, and chooses and " upload taboo
Only open " option；Concrete interface can be found in shown in Fig. 2；
Whether step S14, choose according to described option, described " upload and the forbid opening " flag bit that option is corresponding of amendment；This step
Rapid being specially is worked as in the described subprogram attributes edit page, has chosen " upload and forbid opening " option, then by corresponding mark
Position is revised as " 1 ", otherwise corresponding flag bit is revised as " 0 ".
Step S16, is downloaded to the subprogram after described encryption and described flag bit in PLC.
Further, also comprise the following steps that
Step S18, the subprogram after described encryption is after PLC is uploaded to the success of PLC program editing machine, in described subprogram
Increasing " uploading successfully " flag bit, as long as once uploading successfully, this flag bit is 1 the most always；
Step S19, the flag bit corresponding to " uploading and forbid opening " described in the subprogram after described encryption is " 1 ", and deposits
At described " uploading successfully " flag bit, then control to make the content of described subprogram can not be checked and be edited；Add when described
Flag bit corresponding to " uploading and forbid opening " described in subprogram after close is " 0 ", then control to make the content of described subprogram
Can be checked after decryption and can be edited.The interface of this two states can see shown in Fig. 3 and Fig. 4 respectively.
Specifically exist, the subprogram that described needs are encrypted includes the checkout of version number subprogram of PLC and stops
Only (Stop) subprogram；
Wherein, the checkout of version number subprogram of PLC is used for reading the version number of the current PLC that described subprogram is downloaded to, and
The version number read is compared with the version number of storage in subprogram；
Described stopping subprogram, for when the checkout of version number subprogram comparative result of PLC differs for both, controls to stop
The operation of described PLC.
So, by arranging flag bit corresponding to " upload and forbid opening " and " uploading successfully " flag bit, can be at son
Program does not allows to open after uploading, and is possible to prevent this subprogram encrypted to be cracked.
As it is shown in figure 5, be the structural representation of an embodiment of a kind of PLC programing system that the present invention provides.In this enforcement
In example, this PLC programing system 1 includes:
Subprogram selects unit, in PLC program editing machine, selects the subprogram needing to be encrypted；
Cryptographic processing unit 10, in the described subprogram attributes edit page, is encrypted described subprogram, and
Choose " upload and forbid opening " option；
Flag bit amendment unit 11, whether for choosing according to described option, described " upload and the forbid opening " option of amendment is corresponding
Flag bit；
Download unit 12, for being downloaded to the subprogram after described encryption and described flag bit in PLC；
Upload successfully sign unit 13, be uploaded to PLC program editing machine for the subprogram after described encryption being detected from PLC
After success, described subprogram increases " uploading successfully " flag bit；
Subprogram editor control unit 16, for corresponding to " upload and forbid opening " described in the subprogram after described encryption
Flag bit is " 1 ", and there is described " uploading successfully " flag bit, controls to make the content of described subprogram invisible and can not be compiled
Volume；Flag bit corresponding to " uploading and forbid opening " described in the subprogram after described encryption is " 0 ", then control to make described son
The content of program can be checked after decryption and can be edited；
Memory element 15, is used for storing the information such as aforementioned flag bit, PLC version number.
Wherein, described flag bit amendment unit 12 revises described " upload and forbid opening " the most in the following manner
The flag bit that option is corresponding:
When, in the described subprogram attributes edit page, having chosen " upload and forbid opening " option, then corresponding flag bit has been repaiied
Change into " 1 ", otherwise corresponding flag bit is revised as " 0 ".
Wherein, the subprogram that described needs are encrypted includes PLC checkout of version number subprogram and stops sub-journey
Sequence；
Wherein, PLC checkout of version number subprogram is used for reading the version number of the current PLC that described subprogram is downloaded to, and will
The version number read compares with the version number of storage in subprogram；
Described stopping subprogram, for when the checkout of version number subprogram comparative result of PLC differs for both, controls to stop
The operation of described PLC.
Correspondingly, one of them embodiment of the present invention additionally provides a kind of method that subroutine carries out verifying, and is used for
The encryption subprogram that the method being encrypted the subroutine using earlier figures 1 to Fig. 4 to be introduced is obtained is being downloaded to PLC
Test after in, it is characterised in that comprise the steps:
Run the PLC checkout of version number subprogram in described encryption subprogram, read the version number of current PLC, and will be read
Version number and described encryption subprogram in the PLC version number of storage compare；
When comparative result differs for both, represent that this PLC is unauthorized PLC, control to stop the operation of described PLC.
More details, can be in the lump with reference to the aforementioned explanation to Fig. 1 to Fig. 4.
Specifically, in PLC program editing machine, this subprogram can be a part of program organization unit (POU)；Program
Organizational unit (POU) includes mastery routine (OB1), subprogram and interrupt service routine.POU can individually encrypt, the POU after encryption
A labelling locked can be shown, it is impossible to open and check contents of program.Download program is in CPU, more also keeps encryption shape after uploading
State.
Implement the embodiment of the present invention, there is following beneficial effect:
The technical scheme that the embodiment of the present invention provides, by arranging, in encryption subprogram, the mark that " upload and forbid opening " is corresponding
Position and " uploading successfully " flag bit, after this subprogram is uploaded, and the flag bit of " upload and forbid opening " correspondence is " 1 "
It is that then this subprogram does not allows to be opened, and cannot view or edit the content of this subprogram on PLC program editing machine, permissible
The subprogram preventing encryption is cracked and is replicated, thus prevents this encryption subprogram from running on unauthorized PLC.
The above disclosed present pre-ferred embodiments that is only, can not limit the right model of the present invention with this certainly
Enclose, the equivalent variations therefore made according to the claims in the present invention, still belong to the scope that the present invention is contained.
Claims (9)
1. the method that a subroutine is encrypted, it is characterised in that comprise the steps:
In PLC program editing machine, select the subprogram needing to be encrypted；
In the described subprogram attributes edit page, described subprogram is encrypted, and chooses " upload and forbid opening "
Option；
Whether choose according to described option, described " upload and the forbid opening " flag bit that option is corresponding of amendment；
Subprogram after described encryption and described flag bit are downloaded in PLC.
2. the method that subroutine as claimed in claim 1 is encrypted, it is characterised in that " upload taboo described in described amendment
Only open " step of flag bit that option is corresponding particularly as follows:
When, in the described subprogram attributes edit page, having chosen " upload and forbid opening " option, then corresponding flag bit has been repaiied
Change into " 1 ", otherwise corresponding flag bit is revised as " 0 ".
3. the method that subroutine as claimed in claim 2 is encrypted, it is characterised in that the son that described needs are encrypted
Program includes the checkout of version number subprogram of PLC and stops subprogram；
Wherein, the checkout of version number subprogram of PLC is used for reading the version number of the current PLC that described subprogram is downloaded to, and
The version number read is compared with the version number of storage in subprogram；
Described stopping subprogram, for when the checkout of version number subprogram comparative result of PLC differs for both, controls to stop
The operation of described PLC.
4. the method that subroutine as claimed in claim 3 is encrypted, it is characterised in that farther include:
Subprogram after described encryption from PLC be uploaded to PLC program editing machine success after, in described subprogram increase " on
Carry successfully " flag bit；
Flag bit corresponding to " uploading and forbid opening " described in the subprogram after described encryption is " 1 ", and described in existence " on
Carry successfully " flag bit, then control to make the content of described subprogram can not be checked and be edited；When the sub-journey after described encryption
Flag bit corresponding to " uploading and forbid opening " described in sequence is " 0 ", then control to make the content of described subprogram after decryption may be used
Checked and can be edited.
5. a PLC programing system, it is characterised in that including:
Subprogram selects unit, in PLC program editing machine, selects the subprogram needing to be encrypted；
Cryptographic processing unit, in the described subprogram attributes edit page, is encrypted described subprogram, and hooks
Choosing " upload and forbid opening " option；
Flag bit amendment unit, whether for choosing according to described option, described " upload and the forbid opening " option of amendment is corresponding
Flag bit；
Download unit, for being downloaded to the subprogram after described encryption and described flag bit in PLC.
6. PLC programing system as claimed in claim 5, it is characterised in that described flag bit amendment unit is specifically with following side
Described " upload and the forbid opening " flag bit that option is corresponding of formula amendment:
When, in the described subprogram attributes edit page, having chosen " upload and forbid opening " option, then corresponding flag bit has been repaiied
Change into " 1 ", otherwise corresponding flag bit is revised as " 0 ".
7. a kind of PLC programing system, it is characterised in that wrap in the subprogram that described needs are encrypted
Containing PLC checkout of version number subprogram and stopping subprogram；
Wherein, PLC checkout of version number subprogram is used for reading the version number of the current PLC that described subprogram is downloaded to, and will
The version number read compares with the version number of storage in subprogram；
Described stopping subprogram, for when the checkout of version number subprogram comparative result of PLC differs for both, controls to stop
The operation of described PLC.
8. a kind of PLC programing system as claimed in claim 7, it is characterised in that farther include:
Upload and successfully indicate unit, be uploaded to PLC program editing machine for the subprogram after described encryption being detected from PLC
After merit, described subprogram increases " uploading successfully " flag bit；
Subprogram editor control unit, for the mark corresponding to " upload and forbid opening " described in the subprogram after described encryption
Will position is " 1 ", and there is described " uploading successfully " flag bit, controls to make the content of described subprogram invisible and can not be compiled
Volume；Flag bit corresponding to " uploading and forbid opening " described in the subprogram after described encryption is " 0 ", then control to make described son
The content of program can be checked after decryption and can be edited.
9. subroutine carries out the method verified, for using claim 1-4 any one subroutine such as to add
The encryption subprogram that close method is obtained is tested after being downloaded in PLC, it is characterised in that comprise the steps:
Run the PLC checkout of version number subprogram in described encryption subprogram, read the version number of current PLC, and will be read
Version number and described encryption subprogram in the version number of storage compare；
When comparative result differs for both, control to stop the operation of described PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610862176.7A CN106325202A (en) | 2016-09-29 | 2016-09-29 | Subroutine encrypting method, verifying method and corresponding PLC programming system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610862176.7A CN106325202A (en) | 2016-09-29 | 2016-09-29 | Subroutine encrypting method, verifying method and corresponding PLC programming system |
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| CN201610862176.7A Pending CN106325202A (en) | 2016-09-29 | 2016-09-29 | Subroutine encrypting method, verifying method and corresponding PLC programming system |
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Cited By (1)
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| CN107659397A (en) * | 2017-08-11 | 2018-02-02 | 深圳市钱海网络技术有限公司 | A kind of sensitive information transmission method and system |
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| CN107659397A (en) * | 2017-08-11 | 2018-02-02 | 深圳市钱海网络技术有限公司 | A kind of sensitive information transmission method and system |
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Application publication date: 20170111 |