CN103034815A - Detection method and device for portable document format (PDF) file - Google Patents
Detection method and device for portable document format (PDF) file Download PDFInfo
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- CN103034815A CN103034815A CN2011103001568A CN201110300156A CN103034815A CN 103034815 A CN103034815 A CN 103034815A CN 2011103001568 A CN2011103001568 A CN 2011103001568A CN 201110300156 A CN201110300156 A CN 201110300156A CN 103034815 A CN103034815 A CN 103034815A
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Abstract
The invention provides a detection method for a portable document format (PDF) file. The detection method comprises the following steps of: monitoring a new PDF file created in a target folder; judging whether an encrypted information field in the PDF file is in line with an encryption standard or not; if the encrypted information field is in line with the encryption standard, further acquiring a decrypted file corresponding to the PDF file; and judging whether the decrypted file is correct or not to judge whether the PDF file is correctly encrypted or not. The invention provides a detection device for the PDF file. The detection device comprises a monitoring module, a field judgment module, an acquisition module and a decryption judgment module, wherein the monitoring module is used for monitoring the new PDF file created in the target folder; the field judgment module is used for judging whether the encrypted information field in the PDF file is in line with the encryption standard or not; the acquisition module is used for further acquiring the decrypted file corresponding to the PDF file if the encrypted information field is in line with the encryption standard; and the decryption judgment module is used for judging whether the decrypted file is correct or not to judge whether the PDF file is correctly encrypted or not. The encryption and the decryption of the PDF file are automatically tested.
Description
Technical field
The present invention relates to the work flow before printing technical field, in particular to a kind of detection method for pdf document and device.
Background technology
In the prior art, in the work flow before printing based on pdf document, for the consideration of security, the pdf document that generates in the processing procedure tends to be encrypted by modes such as encryption locks.Unavoidably also to be decrypted aftertreatment to encrypting pdf document in the flow process, as generating preview graph, the operation such as flying in advance.Whether the encryption of checking pdf document correctly is a very important content measurement for the tester, and main content measurement comprises:
1 in the situation that do not install that any Acrobat deciphering plug-in unit is manual opens the encryption pdf document, if can't open, and then file encryption success; If can open, then file encryption lost efficacy.
Whether generate the JPG preview graph after the 2 retrieval pdf document deciphering, judge the correctness of file encryption by JPG preview map generalization.
Above test prerequisite is the source file that uses in the test process in the situation that without encryption lock, and is correct by normalizer kernel explanation results.
Summary of the invention
The present invention aims to provide a kind of detection method for pdf document and device, to solve the problem that adds density test of pdf document.
In an embodiment of the present invention, provide a kind of detection method for pdf document, having comprised: the new pdf document that produces in the monitoring objective file; Judge whether the enciphered message field in the pdf document meets encryption standard; If meet, then further obtain the corresponding declassified document of pdf document; By judging whether declassified document is correct, whether correct with the encryption of determining pdf document.
In an embodiment of the present invention, provide a kind of pick-up unit for pdf document, having comprised: monitoring module is used for the new pdf document that the monitoring objective file produces; The field judge module is used for judging whether the enciphered message field of pdf document meets encryption standard; Acquisition module if be used for meeting, then further obtains the corresponding declassified document of pdf document; Whether the deciphering judge module is used for by judging whether declassified document is correct, correct with the encryption of determining pdf document.
The detection method and the device that are used for pdf document of the above embodiment of the present invention have been realized the automatic test that pdf document is encrypted.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 shows the process flow diagram according to the detection method that is used for pdf document of the embodiment of the invention;
Fig. 2 shows the process flow diagram that is used for according to the preferred embodiment of the invention the detection method of pdf document;
Fig. 3 shows the schematic diagram according to the pick-up unit that is used for pdf document of the embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 shows the process flow diagram according to the detection method that is used for pdf document of the embodiment of the invention, comprising:
Step S10, the new pdf document that produces in the monitoring objective file;
Step S20 judges whether the enciphered message field in the pdf document meets encryption standard;
Step S30 if meet, then further obtains the corresponding declassified document of pdf document;
Step S40, whether correct by judging declassified document, whether correct with the encryption of determining pdf document.
Because the result who encrypts by encryption lock is not identical to each pdf document, if whether the checking encrypted result is accurate, need a large amount of file of test just can obtain metastable conclusion.When test file quantity was a lot, if test with artificial method, it is very low that the efficient of test can become, and accuracy also can reduce.And in the present embodiment, a testing process is provided, can realize this testing process by computer programming, for example come execution in step S10 with the monitoring function, come execution in step S20 with regular expression, come execution in step S30 with the flow process control algolithm, come execution in step S40 with judgement statement and documentation function etc., thereby can automatically realize the density test that adds of pdf document in enormous quantities.This can improve the efficient that seal pre-treatment flow process File adds density test, the resource that saves manpower and time, the hit rate of increase defective.
Preferably, before step S20, also comprise:
The reading out data table;
Judge that whether putting down in writing pdf document in the tables of data processed;
If record was processed, then ignore pdf document;
Otherwise, continue execution in step S20.
Preferably, after the step S20, also comprise:
If there is no the enciphered message field is then determined the pdf document unencryption, and will be determined that outcome record is in tables of data;
If the form of enciphered message field does not meet encryption standard, then determine pdf document encryption mistake, and will determine that outcome record (is and processes) in tables of data;
If the form of enciphered message field meets encryption standard, then recording of encrypted character string and judged result in tables of data.
Prior art need to manually be filled in certain test record, and the statistics of test result is very inconvenient.Above preferred embodiment adopts tables of data to put down in writing the disposition of pdf document, thereby can the history of forming record, can provide intuitively test report, is conducive to carry out that daily record is consulted etc., helps the tester to carry out extensive compatibility test.Can also deposit the attributes such as file name, size, time in tables of data, storage file does not carry out re-treatment.For tables of data, can provide the functions such as printing, preservation, transmission mail.
Whether preferably, step S30 comprises: obtain the preview graph file with filename corresponding with the filename of pdf document, for example, search with pdf document JPG file of the same name and exist.When the PDF interpreter generates PDF, generally all to generate the JPG preview graph for checking, generation JPG preview graph must be decrypted the encryption pdf document that generates first and read, if encrypt when invalid or wrong, this preview graph can generate scarcely, therefore, utilize this characteristic, whether the JPG preview graph generates and can be used as test file and whether encrypt correct important evidence.By the detection to the preview graph file, can determine whether the encryption of pdf document is correct.The preferred embodiment is fairly simple, easily realizes.
Preferably, step S40 comprises:
If the preview graph file exists, its creation-time is later than the creation-time of pdf document, and its file size is non-vanishing, determines that then the pdf document encryption is correct;
If above-mentioned arbitrary condition does not satisfy, then determine pdf document encryption mistake.
Above-mentioned condition judgment process can realize with some very simple documentation functions, thereby be easy to carry out computer programming.
Fig. 2 shows the process flow diagram that is used for according to the preferred embodiment of the invention the detection method of pdf document, comprises the steps:
Step S202, monitoring scanning is encrypted pdf document and is generated catalogue;
Step S204, when the monitoring folder content changes, be that new encryption pdf document is when producing, judge whether file is untreated new pdf document, when the pdf document that gets access to processed out-of-date, in tables of data, can get access to corresponding record, then no longer continue to process this document, continue the scanning document catalogue;
Step S206 when the pdf document that gets access to is untreated, opens pdf document stream, obtains the enciphered message field that records in the pdf document;
Step S208 judges whether the enciphered message field exists;
Step S210, the enciphered message field of pdf document if there is no then no longer continues to process this document, directly record pdf document unencryption in tables of data;
Step S212 if the enciphered message field of pdf document exists, judges further then whether the form of enciphered message field meets encryption standard;
Step S214 if do not meet, then determines the file encryption mistake, and judged result is recorded in the tables of data;
Step S216, if pdf document enciphered message field meets standard, then log file encrypted characters sequence and judged result in tables of data;
Step S218, search the JPG file of the same name with pdf document, such as pdf document title [407_ZBA05705C_ps_p0001_b30.pdf], corresponding JPG preview graph file of the same name [407_ZBA05705C_ps_p0001_b30_Pre.jpg] [407_ZBA05705C_ps_p0001_b30_Tmb.jpg];
Step S214, if JPG preview graph file does not exist, then log file is encrypted mistake in tables of data.
Step S220, if JPG preview graph file exists, and size be not 0K, log file is encrypted correctly in tables of data.
Step S222, above test result all is recorded in the tables of data, can print or sends mail to the dependence test personnel as annex.
Fig. 3 shows the schematic diagram according to the pick-up unit that is used for pdf document of the embodiment of the invention, comprising:
Whether deciphering judge module 40 is used for by judging whether declassified document is correct, correct with the encryption of determining pdf document.
Preferably, this device also comprises:
Read module is used for the reading out data table;
Process judge module, be used for judging whether tables of data is put down in writing pdf document and processed;
Ignore module, processed if be used for record, then ignore pdf document;
Calling module is used for otherwise calls the field judge module.
Preferably, this device also comprises:
The first module is used for if there is no enciphered message field, then determines the pdf document unencryption, and will determine that outcome record is in tables of data;
The second module does not meet encryption standard if be used for the form of enciphered message field, then determines pdf document encryption mistake, and will determine that outcome record is in tables of data;
The 3rd module meets encryption standard if be used for the form of enciphered message field, then recording of encrypted character string and judged result in tables of data.
Preferably, acquisition module obtains the preview graph file with filename corresponding with the filename of pdf document.
Preferably, if deciphering judge module preview graph file exists, its creation-time is later than the creation-time of pdf document, and its file size is non-vanishing, determines that then the pdf document encryption is correct; If above-mentioned arbitrary condition does not satisfy, then determine pdf document encryption mistake.
As can be seen from the above description, the present invention has improved PDF and has encrypted the efficient of correctness test, and can provide intuitively test report.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the memory storage and be carried out by calculation element, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a detection method that is used for pdf document is characterized in that, comprising:
The new pdf document that produces in the monitoring objective file;
Judge whether the enciphered message field in the described pdf document meets encryption standard;
If meet, then further obtain the corresponding declassified document of described pdf document;
By judging whether described declassified document is correct, whether correct with the encryption of determining described pdf document.
2. method according to claim 1 is characterized in that, the enciphered message field in judging described pdf document also comprises before whether meeting encryption standard:
The reading out data table;
Judge that whether putting down in writing described pdf document in the described tables of data processed;
If record was processed, then ignore described pdf document;
Otherwise the continuation execution is described judges whether the enciphered message field in the described pdf document meets the step of encryption standard.
3. method according to claim 2 is characterized in that, judges whether the enciphered message field in the described pdf document meets after the encryption standard, also comprises:
If there is no described enciphered message field is then determined described pdf document unencryption, and will be determined that outcome record is in described tables of data;
If the form of described enciphered message field does not meet encryption standard, then determine described pdf document encryption mistake, and will determine that outcome record is in described tables of data;
If the form of described enciphered message field meets encryption standard, then recording of encrypted information field and judged result in described tables of data.
4. method according to claim 3 is characterized in that, obtains the corresponding declassified document of described pdf document and comprises:
Obtain the preview graph file with filename corresponding with the filename of described pdf document.
5. method according to claim 4 is characterized in that, judges whether described declassified document correctly comprises:
If described preview graph file exists, its creation-time is later than the creation-time of described pdf document, and its file size is non-vanishing, determines that then described pdf document encryption is correct;
If above-mentioned arbitrary condition does not satisfy, then determine described pdf document encryption mistake.
6. a pick-up unit that is used for pdf document is characterized in that, comprising:
Monitoring module is used for the new pdf document that the monitoring objective file produces;
The field judge module is used for judging whether the enciphered message field of described pdf document meets encryption standard;
Acquisition module if be used for meeting, then further obtains the corresponding declassified document of described pdf document;
Whether the deciphering judge module is used for by judging whether described declassified document is correct, correct with the encryption of determining described pdf document.
7. device according to claim 6 is characterized in that, also comprises:
Read module is used for the reading out data table;
Process judge module, be used for judging whether described tables of data is put down in writing described pdf document and processed;
Ignore module, processed if be used for record, then ignore described pdf document;
Calling module is used for otherwise calls described field judge module.
8. device according to claim 7 is characterized in that, also comprises:
The first module is used for if there is no described enciphered message field, then determines described pdf document unencryption, and will determine that outcome record is in described tables of data;
The second module does not meet encryption standard if be used for the form of described enciphered message field, then determines described pdf document encryption mistake, and will determine that outcome record is in described tables of data;
The 3rd module meets encryption standard if be used for the form of described enciphered message field, then recording of encrypted information field and judged result in described tables of data.
9. device according to claim 8 is characterized in that, described acquisition module obtains the preview graph file with filename corresponding with the filename of described pdf document.
10. device according to claim 9 is characterized in that, if the described preview graph file of described deciphering judge module exists, its creation-time is later than the creation-time of described pdf document, and its file size is non-vanishing, determines that then described pdf document encryption is correct; If above-mentioned arbitrary condition does not satisfy, then determine described pdf document encryption mistake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110300156.8A CN103034815B (en) | 2011-09-30 | 2011-09-30 | Detection method and device for portable document format (PDF) file |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110300156.8A CN103034815B (en) | 2011-09-30 | 2011-09-30 | Detection method and device for portable document format (PDF) file |
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| CN103034815A true CN103034815A (en) | 2013-04-10 |
| CN103034815B CN103034815B (en) | 2015-07-22 |
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| CN201110300156.8A Expired - Fee Related CN103034815B (en) | 2011-09-30 | 2011-09-30 | Detection method and device for portable document format (PDF) file |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104750675A (en) * | 2015-04-01 | 2015-07-01 | 山东省计算中心（国家超级计算济南中心） | Identification method for encrypted file of unknown format |
| CN108038441A (en) * | 2017-12-07 | 2018-05-15 | 庞军良 | A kind of System and method for based on image recognition |
| CN109767516A (en) * | 2018-12-14 | 2019-05-17 | 北京摩拜科技有限公司 | Log setting and Method of printing, setting and printing device and log system |
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| US20050289639A1 (en) * | 2004-06-23 | 2005-12-29 | Leung Wai K | System and method of securing the management of documentation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104750675A (en) * | 2015-04-01 | 2015-07-01 | 山东省计算中心（国家超级计算济南中心） | Identification method for encrypted file of unknown format |
| CN104750675B (en) * | 2015-04-01 | 2017-09-26 | 山东省计算中心（国家超级计算济南中心） | A kind of unknown format encrypts the recognition methods of file |
| CN108038441A (en) * | 2017-12-07 | 2018-05-15 | 庞军良 | A kind of System and method for based on image recognition |
| CN108038441B (en) * | 2017-12-07 | 2021-03-16 | 潘晓梅 | System and method based on image recognition |
| CN109767516A (en) * | 2018-12-14 | 2019-05-17 | 北京摩拜科技有限公司 | Log setting and Method of printing, setting and printing device and log system |
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| Publication number | Publication date |
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| CN103034815B (en) | 2015-07-22 |
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