CN101923875B - Method for controlling Java safety of blue-ray disc, video and audio play device and control circuit - Google Patents
Method for controlling Java safety of blue-ray disc, video and audio play device and control circuit Download PDFInfo
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Abstract
The invention relates to a system for controlling Java safety of a blue-ray disc, a video and audio play device and a control circuit. The method for controlling the Java safety of the blue-ray disc comprises the following steps: verifying files in a Java file list by utilizing at least one signature file; and after the operation of verifying the files in the Java file list by utilizing the at least one signature file is finished, verifying at least one signature file by utilizing at least one signature block file corresponding to the at least one signature file. The method for controlling the Java safety of the blue-ray disc, the video and audio play device and the control system can effectively control the Java safety of the blue-ray disc.
Description
Technical field
The invention relates to Blu-ray Disc (Blu-ray Disc, BD), and particularly be used for controlling the method for Blu-ray Disc Java (BD-Java, BD-J) safety and relevant video-audio playing device and control system thereof about a kind of.
Background technology
Blu-ray Disc Java (i.e. " Blu-ray Disc java applet language ") can be considered a kind of platform of supporting senior content for Blu-ray Disc.For the ease of comprehensive understanding, at first be described as follows about the background of Blu-ray Disc Java.
Blu-ray Disc Java is based on the whole world and can carries out a conception of species of Multimedia Home Platform (Globally Executable Multimedia Home Platform, Globally Executable MHP, GEM) and design.The basis that Multimedia Home Platform almost becomes most of global digital television application standards can be carried out in the above-mentioned whole world, these standards are for example: Multimedia Home Platform (Multimedia Home Platform, MHP), open cable application platform (the OpenCableTM Application Platform that is used for the North America CATV (cable television), OCAPTM) and the senior common application platform (Advanced Common Application Platform, ACAP) that is used for ABC American Broadcasting Co..Substantially, the standard that can carry out Multimedia Home Platform based on the whole world all is based upon on the java applet language technology of sun computing machine system house (Sun Microsystems), therefore can reach the content interoperability (Interoperability) of height between these standards.For example: it is feasible that the Blu-ray Disc content characteristic is used to selecting video; Again for example: the interactive television content of some type is also feasible by Reseal for use in Blu-ray Disc.
Owing to relating to the foregoing interoperability, it is quite important that security mechanism just seems.The security mechanism model that the security mechanism of Blu-ray Disc Java is based on the java applet language platform designs.According to the security mechanism of Blu-ray Disc Java, in Java filing (Java Archive, JAR) archives, the application program of being signed can more be worked than the application program of not signed; Such as: to the accesses such as read/write (access) action of local storage device, network access, to the selection of some title on the disc of Blu-ray Disc ROM (read-only memory) type (BD Read-Only Memory, BD-ROM) and to the control of other executory Blu-ray Disc application program.
Due to Java Virtual Machine (Java Virtual Machine, JVM) the existing form that limits to for the standard that satisfies widespread use, prior art is controlled too loose for the usefulness of Java safety of blue-ray disc, so that treatment efficiency in some cases descends.Therefore, the control for Java safety of blue-ray disc needs a novelty and efficient method.
More specifically at present in JVM, verification is by signature block file (Signature Block File, SBF) signature verification file (Signature File, SF), and then by SF verification MF
(Java file list file), this mode verification chronic.When its reason is SBF check SF, SF can be hash and calculates a hash value; Then with in the leafcertificate in the SBF file with public key with the Signature value in SBF file decoding, obtain a hash value, with this value and SF is carried out the hash value that the hash computing draws do contrast.If identical, SBF verification SF success is passed through this verification to SF/SBF; Otherwise SF is unsuccessful in the SBF verification, discards corresponding SF/SBF pair.Here relate to deciphering and be hash and calculate.It is long that relative hash of the time of deciphering calculates.
Summary of the invention
Control too loose for solving above-mentioned usefulness for Java safety of blue-ray disc, so that the problem that treatment efficiency in some cases descends, the invention provides a kind of method, video-audio playing device and control system for controlling Java safety of blue-ray disc, can effectively control Java safety of blue-ray disc.
A kind of method that is used for controlling Java safety of blue-ray disc includes: verify Java file list file by utilizing at least one signature file; And by utilizing after at least one signature file verifies that the running of Java file list file is completed, verify at least one signature file by utilizing corresponding at least one signature block file of at least one signature file.
A kind of video-audio playing device includes storage module or portable Storage Media load-on module, and controller.Portable Storage Media load-on module is used for loading portable Storage Media.Controller is used for controlling Java safety of blue-ray disc for storage module or portable Storage Media, its middle controller is by utilizing at least one signature file to verify a Java file list file, and by utilizing after at least one signature file verifies that the running of Java file list file is completed, controller is verified at least one signature file by utilizing corresponding at least one signature block file of at least one signature file.
A kind of control system that is used for controlling Java safety of blue-ray disc is used for video-audio playing device.The control system that is used for controlling Java safety of blue-ray disc includes by utilizing at least one signature file to verify the module of Java file list file, and by utilizing after at least one signature file verifies that the running of Java file list file is completed, by utilizing the module of verifying at least one signature file corresponding at least one signature block file of at least one signature file.
Above-mentioned method, video-audio playing device and control system for controlling Java safety of blue-ray disc is by utilizing at least one signature file to verify Java file list file, and by utilizing after at least one signature file verifies that the running of Java file list file is completed, verify at least one signature file by utilizing corresponding at least one signature block file of at least one signature file, thereby effectively control Java safety of blue-ray disc.
Description of drawings
Fig. 1 is the schematic diagram according to the video-audio playing device of first embodiment of the invention.
Fig. 2 is the process flow diagram of a kind of be used for controlling Java safety of blue-ray disc according to an embodiment of the present invention method.
Fig. 3 is the schematic diagram of verification chain related in method shown in Figure 2.
Fig. 4 is the schematic diagram according to the video-audio playing device of second embodiment of the invention.
Embodiment
Please refer to Fig. 1, Fig. 1 is the schematic diagram according to the video-audio playing device 100 of first embodiment of the invention, and wherein the video-audio playing device 100 of present embodiment can be used as Blu-ray Disc (Blu-ray Disc, BD) player.Video-audio playing device 100 includes: storage module 110, portable Storage Media load-on module 120, controller 130 and storer 140.Portable Storage Media load-on module 120 is used for loading portable Storage Media.Storer 140 examples are nonvolatile memory.
In the present embodiment, storage module 110 is embodied as hard disk drive (Hard Disk Drive, HDD), and portable Storage Media load-on module 120 is embodied as the Blu-ray Disc load-on module, is used for loading Blu-ray Disc.Yet this just for illustrative purposes, is not limitation of the present invention.According to a change mode of present embodiment, portable Storage Media load-on module 120 is embodied as the card reader module, (for example: safe digital card (Security Digital Card)) is used for loading at least one storage card.This type of variation is not limitation of the present invention.
According to present embodiment, controller 130 is micro-control unit (Micro Control Unit, MCU), and it carries out a program code 140C who reads from storer 140.Yet this just for illustrative purposes, is not limitation of the present invention.According to a change mode of present embodiment, controller 130 is a hardware control, wherein is built in hardware control in program code 140C.That is to say, whether a program code example program code 140C described above is stored in storer, can change to some extent according to the different change mode of present embodiment; This type of variation is not limitation of the present invention.For example: in another change mode of present embodiment, video-audio playing device 100 can be portable video-audio playing device, and treatment circuit (for example portable Storage Media load-on module 120) is embodied as microprocessing unit (the Micro Processing Unit of executive routine code, MPU), wherein program code software code for example, can be stored in advance in portable video-audio playing device or download from server (Server) or the Internet (Internet).
The controller 130 of present embodiment can be controlled the runnings such as storage/reading out data of storage module 110 and portable Storage Media load-on module 120, and can decode, to reach the due basic running of audio-visual reproducer.Yet this just for illustrative purposes, is not limitation of the present invention.According to a change mode of present embodiment, display module and digital tuner can be integrated into video-audio playing device 100, so can form the multifunctional digital TV; This type of changes also non-limitation of the present invention.
Whether need arrange video processing module decode and the running such as image processing, can change to some extent according to the different change mode of present embodiment if note that; This type of variation is not limitation of the present invention.In addition, whether need to arrange screen display (On Screen Display, OSD) treatment circuit and process the decoded video content that expectation is shown, also can change to some extent according to the different change mode of present embodiment; This type of variation is not limitation of the present invention.
The controller 130 of present embodiment more can be controlled Java safety of blue-ray disc for storage module 110 or portable Storage Media except decoding and control the runnings such as storage/reading out data of above-mentioned storage module 110 and portable Storage Media load-on module 120.In the present embodiment, controller 130 (for example: the micro-control unit of above-mentioned executive programs code 140C) can verify Java file list file (Java Archive Manifest File, JARManifest File) by utilizing at least one signature file (Signature File).In addition, by utilizing after at least one signature file verifies that the running of Java file list file is completed, controller 130 (for example micro-control unit of above-mentioned executive programs code 140C) is verified at least one signature file by utilizing corresponding at least one signature block file (Signature Block File) of at least one signature file.
According to present embodiment, user's operation-interface of video-audio playing device 100 comprises telepilot 180, and wherein telepilot 180 sees through Remote Control Interface unit 170 (for example receivers) and controller 130 communications.In addition, but user's operation-interface of video-audio playing device 100 separately comprises the screen menu that some transmission display interfaces are shown, so that the user carries out the operation of various adjustment/setting.In the present embodiment, the button that the user can see through on telepilot 180 is selected, to trigger the runnings such as storage/reading out data of above-mentioned storage module 110 and portable Storage Media load-on module 120, controller 130 optionally carries out above-mentioned control for Java safety of blue-ray disc for content stored in storage module 110 or portable Storage Media.In addition, user's operation-interface of video-audio playing device 100 also can provide the user to select only to operate according to traditional Java safety of blue-ray disc mechanism, or starts the usefulness that above-mentioned control for Java safety of blue-ray disc promotes Java safety of blue-ray disc mechanism.
Can promote the efficient of Java safety of blue-ray disc mechanism in present embodiment for the control of Java safety of blue-ray disc, and when novel and efficient security mechanism are provided, be unlikely to cause processed archives or data incompatible situation to occur.Further illustrate below with reference to Fig. 2.
Fig. 2 is the process flow diagram of a kind of be used for controlling Java safety of blue-ray disc according to an embodiment of the present invention method 910.Method 910 can be applicable to video-audio playing device shown in Figure 1 100, controller 130 especially shown in Figure 1 (for example micro-control unit of above-mentioned executive programs code 140C).In addition, method 910 can be implemented by utilizing video-audio playing device 100, especially by utilizing controller shown in Figure 1 130 (for example micro-control unit of above-mentioned executive programs code 140C) to implement.So, method 910 can be described as follows according to the first embodiment:
Step 912: controller 130 (for example: the micro-control unit of above-mentioned executive programs code 140C) by utilizing at least one signature file to verify Java file list file.The situation that more often runs on implementation is, at least one signature file includes a plurality of signature files, for example: a plurality of signature file SF (0) shown in Figure 3, SF (1), SF (2) ..., SF (99).So, controller 130 (for example: the micro-control unit of above-mentioned executive programs code 140C) in this step by utilize signature file SF (0), SF (1), SF (2) ..., SF (99) verifies Java file list file.
Step 914: controller 130 is verified at least one signature file by utilizing corresponding at least one signature block file (Signature Block File) of at least one signature file by utilizing after at least one signature file verifies that the running of Java file list file is completed.As previously described, the situation that more often runs on implementation is, at least one signature file includes a plurality of signature files, for example a plurality of signature file SF (0) shown in Figure 3, SF (1), SF (2) ..., SF (99); so, by utilizing signature file SF (0), SF (1), SF (2), ..., after SF (99) verifies that the running of Java file list file is completed, controller 130 (for example: the micro-control unit of above-mentioned executive programs code 140C) in this step respectively by utilizing corresponding to signature file SF (0), SF (1), SF (2), ..., a plurality of signature block file of SF (99), a plurality of signature block file SBF (0) shown in Figure 3 for example, SBF (1), SBF (2), ..., SBF (99), come certifying signature file SF (0), SF (1), SF (2), ..., SF (99).
Fig. 3 is the schematic diagram of verification chain related in method shown in Figure 2.As shown in Figure 3, by lowermost authentication category file (Authenticated Class File) play between uppermost certificate (RootCertificate) each verification chain of process be represented by dotted lines in the present embodiment, wherein arrow upwards expression below object be subjected to top object verification.The quantity of the Java file list file that uses due to the checking procedure in Java safety of blue-ray disc mechanism is single, thus in the middle of Fig. 3 by lowermost authentication category file play between uppermost certificate the verification chain of process all pass through single Java file list file.Therefore, in case single Java file list file or signature file SF (0), SF (1), SF (2) ..., SF (99) has any mistake or inapplicable situation, under the advantage of verification running general execution before the verification of step 914 operates of step 912, the controller 130 of present embodiment is just found to take the step of strain soon.
According to present embodiment, controller 130 in a single day judge a plurality of signature file SF (0), SF (1), SF (2) ..., the particular signature file in SF (99) has any mistake or inapplicable situation, stop/avoid carrying out by utilizing this particular signature file to verify the running of Java file list file and by utilizing the running of verifying this particular signature file corresponding to the particular signature block file of this particular signature file.
in addition, in a single day controller 130 judges that Java file list file has any mistake or inapplicable situation, stop/avoid carrying out by utilizing a plurality of signature file SF (0), SF (1), SF (2), ..., SF (99) verifies the running of Java file list file and passes through to utilize corresponding to a plurality of signature file SF (0), SF (1), SF (2), ..., a plurality of signature block file SBF (0) of SF (99), SBF (1), SBF (2), ..., SBF (99) verifies a plurality of signature file SF (0), SF (1), SF (2), ..., the running of SF (99).
In the present embodiment, controller 130 is by above-mentioned control for Java safety of blue-ray disc, just can promote the efficient of Java safety of blue-ray disc mechanism, and when novel and efficient security mechanism are provided, be unlikely to cause processed archives or data incompatible situation to occur.
Change mode according to present embodiment, in case verify that by utilizing a plurality of signature files the existing several of running of Java file list file is the verification failure, controller 130 can suppose first accordingly that Java file list file is wrong, just can optionally omit the verification of each whole verification chains, the performed program code 140C of its middle controller 130 can see through in advance some and revise setting, makes controller 130 directly omit the verification of each whole verification chains under this situation.
Certainly, although the upper efficient of above-mentioned setting running is high, but risky; Just in case controller 130 supposes that first " this Java file list file is wrong " (that is to say that this Java file list file is out of question in fact for wrong hypothesis, but a plurality of signature files in the running of verification failure are wrong or inapplicable in fact), the hypothesis of above-mentioned mistake will cause controller 130 erroneous judgements.Another change mode according to present embodiment, hypothesis for fear of above-mentioned mistake causes erroneous judgement, the performed program code 140C of controller 130 can see through in advance some and revise and set, and makes controller 130 can spot-check a plurality of suspicious signature file in the running of verification failure under this situation; So controller 130 is verified this a plurality of suspicious signature files by utilizing corresponding to a plurality of signature block file of these a plurality of suspicious signature files respectively, to avoid causing controller 130 erroneous judgements because of the hypothesis of above-mentioned mistake.
Another change mode according to present embodiment, hypothesis for fear of above-mentioned mistake causes erroneous judgement, the performed program code 140C of controller 130 can see through in advance some and revise setting, make controller 130 can check each signature file in the running of verification failure under this situation, wherein each signature file in the running of verification failure is all classified suspicious signature file as; So controller 130 is verified this a plurality of suspicious signature files by utilizing corresponding to a plurality of signature block file of these a plurality of suspicious signature files respectively, to avoid causing controller 130 erroneous judgements because of the hypothesis of above-mentioned mistake.
According to another change mode of present embodiment, in case by utilizing a plurality of signature files to verify that the existing several of running of Java file list file is verification succeeds, controller 130 can suppose first accordingly that Java file list file is errorless; After this in case by utilizing a plurality of signature files to verify that any authentication failed appears in the running of Java file list file, because the quantity of the Java file list file in Java safety of blue-ray disc mechanism is single, controller 130 can judge immediately that it is inapplicable in the middle of a plurality of signature files, which signature file being arranged, and avoids verifying this (a bit) inapplicable signature file by utilizing corresponding to the signature block file of inapplicable signature file.Therefore, the present invention can save because these a plurality of signature files have temporal waste due to any mistake or inapplicable situation.
It should be noted that, even controller 130 supposes that first " this Java file list file is errorless " is wrong hypothesis (that is to say that this Java file list file may be wrong or inapplicable), compare with traditional practice, under this situation, present embodiment still has very large chance to make the contribution of enhancing efficiency to the control of whole Java safety of blue-ray disc.Due to single Java file list file be positioned at each verification chain than bottom, originally just should be subject to the verification on upper strata, therefore the running of present embodiment under the poorest situation, is that usefulness does not have lifting compared to traditional practice at most, but is unlikely to the usefulness variation.
Please refer to Fig. 4, Fig. 4 is the schematic diagram according to the video-audio playing device 200 of the present invention's one second embodiment, and wherein the second embodiment is a change mode of the first embodiment.Discrepancy Description between the second embodiment and the first embodiment is as follows.
As shown in Figure 4, video-audio playing device 200 comprises control system 205, control system 205 comprises controller 230 and program code 240C, wherein the controller 230 of present embodiment is hardware control (routine hardware control described above), the above-mentioned controller 130 that is used for replacing, and be built in controller 230 in program code 240C.According to present embodiment, control system 205 is control chip.In addition, program code 240C is the variant version of said procedure code 140C, carries out corresponding control so that controller 230 changes in response to above-mentioned framework.Present embodiment and aforementioned each embodiment/change mode similarity no longer repeat to give unnecessary details.
According to a change mode of the second embodiment, the performed program code of controller 230 in control system 205 reads outside self-controller 230.For example, the performed program code of controller 230 reads the built-in storer in control system 205.Again for example, the performed program code of controller 230 reads an external memory storage outside control system 205.Present embodiment and aforementioned each embodiment/change mode similarity no longer repeat to give unnecessary details.
According to another change mode of the second embodiment, be built in controller 230 in the part of the program code that the controller 230 in control system 205 is performed, and another part of the performed program code of controller 230 reads outside self-controller 230.For example, this another part reads the built-in storer in control system 205.Again for example, another part reads an external memory storage outside control system 205.Present embodiment and aforementioned each embodiment/change mode similarity no longer repeat to give unnecessary details.
The above is only better embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.According to another change mode of the second embodiment, be built in controller 230 in the part of the program code that the controller 230 in control system 205 is performed, and another part of the performed program code of controller 230 reads outside self-controller 230.For example, this another part reads the built-in storer in control system 205.Again for example, another part reads an external memory storage outside control system 205.Present embodiment and aforementioned each embodiment/change mode similarity no longer repeat to give unnecessary details.
The above is only better embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. method that is used for controlling Java safety of blue-ray disc includes:
Verify Java file list file by utilizing at least one signature file; And
By utilizing after this at least one signature file verifies that the running of this Java file list file is completed, verify this at least one signature file by utilizing corresponding at least one signature block file of this at least one signature file.
2. the method that is used for controlling Java safety of blue-ray disc as claimed in claim 1, is characterized in that, this at least one signature file includes a plurality of signature files.
3. the method that is used for controlling Java safety of blue-ray disc as claimed in claim 2, is characterized in that, this method that is used for controlling Java safety of blue-ray disc separately includes:
In case judge that the particular signature file in these a plurality of signature files has any mistake or inapplicable situation, stop and/or avoid carrying out by utilizing this particular signature file to verify the running of this Java file list file and verifying the running of this particular signature file by utilization corresponding to the particular signature block file of this particular signature file.
4. the method that is used for controlling Java safety of blue-ray disc as claimed in claim 1, is characterized in that, this method that is used for controlling Java safety of blue-ray disc separately includes:
In case judge that this Java file list file has any mistake or inapplicable situation, stop and/or avoid carrying out by utilizing this at least one signature file to verify the running of this Java file list file and verifying the running of this at least one signature file by utilization corresponding at least one signature block file of this at least one signature file.
5. video-audio playing device includes:
Storage module or portable Storage Media load-on module, this portable Storage Media load-on module is used for loading portable Storage Media; And
Controller, be used for controlling Java safety of blue-ray disc for this storage module or this portable Storage Media, wherein this controller is by utilizing at least one signature file to verify a Java file list file, and by utilizing after this at least one signature file verifies that the running of this Java file list file is completed, this controller is verified this at least one signature file by utilizing corresponding at least one signature block file of this at least one signature file.
6. video-audio playing device as claimed in claim 5, is characterized in that, this at least one signature file includes a plurality of signature files.
7. video-audio playing device as claimed in claim 6, it is characterized in that, in a single day this controller judges that the particular signature file in these a plurality of signature files has any mistake or inapplicable situation, stops and/or avoids carrying out by utilizing this particular signature file to verify the running of this Java file list file and verifying the running of this particular signature file by utilization corresponding to the particular signature block file of this particular signature file.
8. video-audio playing device as claimed in claim 5, it is characterized in that, in a single day this controller judges that this Java file list file has any mistake or inapplicable situation, stops and/or avoids carrying out by utilizing this at least one signature file to verify the running of this Java file list file and verifying the running of this at least one signature file by utilization corresponding at least one signature block file of this at least one signature file.
9. control system that is used for controlling Java safety of blue-ray disc, this control system that is used for controlling Java safety of blue-ray disc includes:
Verify the module of Java file list file by utilizing at least one signature file, and by utilizing after this at least one signature file verifies that the running of this Java file list file is completed, by utilizing the module of verifying this at least one signature file corresponding at least one signature block file of this at least one signature file.
10. the control system that is used for controlling Java safety of blue-ray disc as claimed in claim 9, is characterized in that, this at least one signature file includes a plurality of signature files.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864135A (en) * | 2003-10-10 | 2006-11-15 | 皇家飞利浦电子股份有限公司 | Java lifecycle model for bd-discs |
| CN1955971A (en) * | 2005-10-27 | 2007-05-02 | 北京振戎融通通信技术有限公司 | Safety installation method suitable for Java application program |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864135A (en) * | 2003-10-10 | 2006-11-15 | 皇家飞利浦电子股份有限公司 | Java lifecycle model for bd-discs |
| CN1955971A (en) * | 2005-10-27 | 2007-05-02 | 北京振戎融通通信技术有限公司 | Safety installation method suitable for Java application program |
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