CN110532811A - A kind of PDF signature method and PDF sealing system - Google Patents
A kind of PDF signature method and PDF sealing system Download PDFInfo
- Publication number
- CN110532811A CN110532811A CN201910815681.XA CN201910815681A CN110532811A CN 110532811 A CN110532811 A CN 110532811A CN 201910815681 A CN201910815681 A CN 201910815681A CN 110532811 A CN110532811 A CN 110532811A
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- Prior art keywords
- signature
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- dictionary
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/93—Document management systems
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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
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
Abstract
The invention discloses a kind of PDF signature methods, first upload PDF document, and show that PDF signs the page；Stamped signature is dragged again to stamped signature position；It is later determined that signature, obtains signature object set；Then parsing signature object set, creates signature field；It finally signs electronically, generation signs documents.Invention additionally discloses a kind of PDF sealing systems of PDF signature method work described using signature.The present invention mainly passes through one common signature dictionary signV of creation, signature result is updated into dictionary of so far signing, then signature field each in PDF document is directed to the reference of the signature dictionary signV, final realization multiple position stamped signatures in a PDF document correspond to the purpose of the same digital certificate.
Description
Technical field
The present invention relates to cryptographic techniques and PDF layout files development field, especially Electronic Signature technology more particularly to one
Kind PDF signature method and PDF sealing system.
Background technique
With the development of technology, more and more enterprises and institutions and government offices take electronic office, greatly
It improves work efficiency, pdf document is increasingly becoming the common document form of each career field.But with the hair of electronic office
Exhibition, electronic document is easy the safety issues such as to be tampered or copy also to be occurred therewith.The technologies such as E-seal or electronic signature
Appearance solves the above problem.E-seal or signature are arranged in pdf document can recognize electronic document signatory's identity, with
Guarantee the integrality of file, while also may indicate that the content that signatory agrees to that electronic document is stated the fact.
In the prior art, need to use the same certificate in a pdf document；Multiple positions with the same seal come
Affix one's seal, or affixed one's seal with different seals (i.e. PDF batch is signed) when, it is general that there are two types of existing solutions.A kind of scheme is
It is embedded in picture in the position for needing to affix one's seal, is then affixed one's seal in the place that the last one needs is affixed one's seal with digital certificate；It is another
Kind scheme is that one of them position of affixing one's seal is affixed one's seal with digital certificate, in other positions with the shape of blank signature plus seal picture
Formula is affixed one's seal.But in practical applications, the defect of the first scheme be embedded in picture form can modify document text, if
Chapter was signed before PDF, the softwares such as Adobe can prompt original text to be tampered, so that sign test does not pass through；Second scheme then will lead to
Adobe software can guide user to be signed with digital certificate in the place of blank signature field, and the head position of seal has red
The experience effect of color alarm prompt, user is bad.
Summary of the invention
The present invention aiming at the shortcomings in the prior art, provides a kind of PDF signature method, comprising the following steps:
Step 1: uploading PDF document, and shows that PDF signs the page
Step 2: dragging stamped signature is to stamped signature position；
Step 3: determining signature, obtains signature object set；
Step 4: parsing signature object set creates signature field；
Step 5: updating electronic signature, and generation signs documents.
Optionally, in the step 2:
When the PDF document only needs single page stamped signature, dragging stamped signature is to stamped signature position；
When the PDF document needs multipage stamped signature, dragging stamped signature is to stamped signature position, and specified page number range；
When the PDF document needs keyword stamped signature, all positions for keyword occur are searched by input keyword
Coordinate is set, then drags stamped signature and waits for stamped signature position to these.
Optionally, in the step 3: clicking signature option, obtain the signature object set sent by front end from the background
It closes；The signature object set includes signature object, and the signature object includes signature type, signs location information, Yi Jiyin
Chapter information.
Optionally, in the step 4: parsing the content of each signature object, and according in the signature object
Hold creation signature field；The signature field includes chapter mould image layer and signature dictionary.
Optionally, in the step 4: loading the PDF document using Open Framework itext5, create a signature
Dictionary signV；The signature dictionary of each signature field is all directed toward the reference of the signature dictionary signV.
Optionally, in the step 5: being signed electronically using digital certificate, and the result of electronic signature is updated
To the signature dictionary signV, rear generate signs documents.
Invention additionally discloses a kind of PDF sealing systems, using mentioned-above PDF signature method come work, the PDF label
Chapter system includes file uploading module, and seal signs module, signs object acquisition module, signs analysis of object module and number
Certificate signature module；The file uploading module is used to PDF document being uploaded to PDF sealing system；The seal signs module
For signing seal in the PDF document uploaded to stamped signature position；The signature object acquisition module is for obtaining signature
Object set, the signature object set include several signature objects, and the signature object signs seal by seal signature module
It is produced；The signature analysis of object module is used to parse each signature object in the signature object set, and according to every
The content creating signature field of a signature object, the signature field include signature dictionary；The signature analysis of object module is also used to
A signature dictionary signV is created, and the signature dictionary of each signature field is made all to be directed toward drawing for the signature dictionary signV
With；The result of electronic signature is updated to the signature dictionary for signing electronically by the digital certificate signature module
signV。
Optionally, each signature field further includes chapter mould image layer, and the chapter mould image layer includes seal pattern；It is described
Each seal pattern is all directed toward electronic signature representated by the digital certificate of the signature dictionary signV reference.
Optionally, the signature analysis of object module loads the PDF document by using Open Framework itext5 simultaneously
Parse the PDF document.
Optionally, the signature object in the signature object set includes signature type, signs location information and seal
Information.
The present invention is literary by using PDF during the signature of a PDF document, is loaded using Open Framework itext5
After shelves, a common signature dictionary signV is created, and signature is created by the content for the signature object for parsing PDF document
Domain, then the signature dictionary of each signature field is directed to the reference of the common signature dictionary signV of the creation, finally use
Digital certificate needed for the PDF document signs electronically, and the seal pattern under each signature field is made to be directed to common signature
Digital certificate cited in dictionary signV, and unique per pro person part of signature under the digital certificate.In same portion
In PDF document, need such as to encounter multipage stamped signature, junction of the edges of two sheets of paper stamped signature or keyword stamped signature when different location carries out stamped signature when encountering
When, the stamped signature that multiple positions may be implemented in the present invention corresponds to the certification of the same digital certificate；And in the seal figure of different location
Sample also in the case where difference, can also correspond to the signer of same digital certificate authentication；Also needing to modify some seal figure simultaneously
When sample, because of the signature field uniquely reference of direction one common signature dictionary signV where the seal pattern, and the label
Name dictionary signV has also obtained the electronic signature of digital certificate, and the electronic signature of the digital certificate meets Adobe standard, because
The phenomenon that being obstructed without operating process is not in the phenomenon that prompt original text is tampered, makes user's operating experience very
Good, process rapid and convenient improves the efficiency that PDF document batch signs stamped signature.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Attached drawing 1 is the flow diagram of the PDF signature method of the embodiment of the present invention one.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Attached drawing, the technical solution of the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is this hair
Bright a part of the embodiment, instead of all the embodiments.Based on described the embodiment of the present invention, ordinary skill
Personnel's every other embodiment obtained under the premise of being not necessarily to creative work, shall fall within the protection scope of the present invention.
Unless otherwise defined, the technical term or scientific term used herein should be in fields of the present invention and has
The ordinary meaning that the personage of general technical ability is understood." one embodiment " or " example " or " example " quoted in this specification
Mean that a particular feature, structure, or characteristic of description in conjunction with the embodiments itself can be included at least one disclosed implementation of this patent
In example.The appearance of each position of the phrase " in one embodiment " in the description is not necessarily all referring to the same embodiment.
Embodiment one:
The present invention discloses a kind of PDF signature method, mainly comprises the steps that
Step 1: PDF document is uploaded.When starting to carry out PDF stamped signature, PDF document to stamped signature is first uploaded to electronics label
Chapter system, and show to the stamped signature page.
Step 2: dragging stamped signature is to stamped signature position.In this step, it needs to select signature type first, i.e. selection is
Need single page stamped signature or multipage stamped signature or keyword stamped signature.
Specifically, when the pdf document of stamped signature only needs single page stamped signature, then the stamped signature of signature is selected, by this stamped signature
It is dragged to stamped signature position；It is the position for needing specifically to cover stamped signature on some page of PDF document to stamped signature position.Such as
In single page stamped signature, to stamped signature position by the specific coordinate X on the place page number and the page number, Y is specified.
When the pdf document when stamped signature needs multipage stamped signature, then the stamped signature of signature is dragged to stamped signature position, and specify
Need the page number range of stamped signature；At this time to stamped signature position simultaneously need to sign page number range (such as 1-8 pages) and on the page number
Specific coordinate X, Y are specified.It is identical that junction of the edges of two sheets of paper stamped signature with multipage stamped signature treats stamped signature method for determining position.
When the pdf document when stamped signature needs keyword stamped signature, then key is found out by the lookup means that keyword inputs
All position coordinates where word.Do positional shift appropriate if necessary to relative key position coordinate, then at this time
The offset X relative to keyword coordinate, Y and keyword position coordinate is then needed to determine jointly to stamped signature position.
Step 3: determining signature, obtains signature object set.In this step, after clicking the button of confirmation signature, after
Platform will obtain the set including institute's sealed contract object sent by front end, i.e. signature object set.Wherein, object is signed
Including sealed contract type, location information and seal information etc. are signed.In other embodiments, signature object is not limited to
The example that the present embodiment provides, further include affix one's seal in practical applications involved in need other resolved signature objects, no
Same embodiment can have different signature Object Selections because of reasons such as design accuracy to be solved, convenience.Wherein, it signs
Administration's location information refers to the specific page number of the seal in PDF document and the coordinate X on the page number and coordinate Y, when encountering multipage label
When chapter or junction of the edges of two sheets of paper stamped signature, signature location information further includes signature page number range, such as needs then to need 1-8 pages in 1-8 pages of upper stamped signature
Signature page number range；Seal information includes seal pictorial information and the wide height of seal, by the byte arrays of parsing seal and picture
Gained；Signing type includes single page stamped signature, multipage stamped signature, junction of the edges of two sheets of paper stamped signature and keyword stamped signature etc..
Step 4: parsing signature object set creates signature field.In this step, Open Framework itext5 is used first
PDF document is loaded, a signature dictionary signV is created.Wherein, Open Framework itext5 is that a open source in the prior art is exempted from
The software taken edits the java class library of PDF document, accordingly, with respect to the introduction of Open Framework itext5 for generating PDF document
It does not describe excessively in the present embodiment.Specifically, this step further include parsing signature object set, i.e., by for circulation come
Circulation parses the content of each signature object, and according to the content creating signature field of signature object, i.e., according to signature position letter
Breath and seal information create signature field.Seal information includes seal pictorial information and the wide height of seal.
Wherein, a stamped signature generates a PDF signature field, and a signature field includes a chapter mould image layer and a signature
Dictionary.Chapter mould image layer includes image object corresponding to the Zhang Mo of stamped signature, this image object is to show in PDF text after stamped signature
Seal pattern on shelves, the seal pattern can be different patterns.Stamped signature dictionary includes signature result data (signature result number
According to for PKCS7 signed data structure), this signature result data includes user certificate information, and PDF comprising this signature makes a summary letter
Breath, and comprising private key corresponding to user certificate to the signature result of PDF summary info.Meanwhile this step is also by each label
The signature dictionary of name domain all points to drawing for the signature dictionary signV that front is created by Open Framework itext5 load PDF document
With the chapter mould image layer under that is, each signature field is all directed toward the reference of the same signature dictionary signV, finally makes each signature field
All use this same signature dictionary signV.
Step 5: updating electronic signature, and generation signs documents.This step carries out electronics label by using digital certificate
Name, this digital certificate are digital certificate corresponding with the signer of PDF document to be signed；And more by the result of electronic signature
Common signature dictionary signV is newly arrived, the new file after ultimately generating signature.In this step, the chapter under each signature field
Mould image layer is all directed toward the reference of same signature dictionary signV, and this common signature dictionary signV is directed toward one only
One represents the digital signature of signer's authentication.Therefore, in a PDF document, if signed before cross stamped signature, because
Newly-built multiple signature fields meet the standard of adobe, therefore the softwares such as adobe (refer mainly to the relevant reading of PDF, software for editing, are
The prior art) it is not in that prompt original text is tampered, this is more convenient for the usage experience of user.
In the prior art of PDF stamped signature, when user needs multiple positions in a electronic contract to sign
Zhang Shi, such as encounter needs multipage stamped signature, junction of the edges of two sheets of paper stamped signature or according to keyword position stamped signature when, the position for needing to affix one's seal has more
Place, then needs to carry out at this time multiple digital signature, but normally result in because of the efficiency of digital certificate signature process by
Situations such as resistance prompt original text such as occurs and is tampered, and sign test does not pass through, influences user experience.
By using PDF signature method provided in this embodiment, multiple stamped signatures can be made to correspond to same once signed, i.e., once
The reference that all chapter mould image layers can be made to be directed toward the same signature dictionary signV is signed, and one in the present embodiment is altogether
With signature dictionary signV be directed toward a digital certificate, therefore, the present embodiment finally realizes portion PDF document in it is multiple not
Stamped signature (the seal pattern of different location can be different images) with position is all directed toward the purpose of the same digital certificate, i.e., not
The signer of the certification of unique identities representated by the same digital certificate is all directed toward with the stamped signature of position.Therefore, the present embodiment can
With solve in the prior art multipage stamped signature, junction of the edges of two sheets of paper stamped signature or according to keyword position stamped signature brought by it is more in same PDF document
The efficiency of a position stamped signature, the i.e. efficiency of batch signature.Simultaneously as the present embodiment meets Adobe digital certificate
Standard, therefore when occurring needing to modify seal pattern (i.e. image object corresponding to chapter mould image layer Zhang Mo), because number is demonstrate,proved
Book is unique and does not change, therefore the softwares such as Adobe will not prompt original text to be modified.
Embodiment two:
The present embodiment discloses a kind of a kind of PDF label to work by one of embodiment one PDF signature method
Chapter system.Wherein, a kind of PDF sealing system disclosed in the present embodiment includes file uploading module, and seal signs module, signature
Object acquisition module signs analysis of object module and digital certificate signature module.Specifically, file uploading module is for will be to
The PDF document of stamped signature is uploaded to PDF sealing system, and shows to the stamped signature page.Then, seal signature module is then used for stamped signature
It is dragged to stamped signature position, and clicks signature；Meanwhile after clicking signature, the signature object acquisition module on backstage be will acquire
The signature object set sent from foreground, signing the signature object in object set includes signature type, signature position letter
Breath and seal information.Signature analysis of object module is then used to parse signature object set, according to the signature position of signature object
Information and seal information creating signature field, signature field include chapter mould image layer and signature dictionary, and signature analysis of object module also makes
A signature dictionary signV is created after loading PDF document with Open Framework itext5, refers both to the signature dictionary of each signature field
Reference to the same signature dictionary signV, signature dictionary signV, which is then directed toward one, uniquely to be believed by digital certificate authentication identity
The signer of breath.Digital certificate signature module using digital certificate for being signed electronically, and by the result of electronic signature
Common signature dictionary signV is updated, the new file after generating signature.Due in the present embodiment, chapter mould image layer includes
Seal pattern, the signature dictionary of each signature field are directed to the reference of the same signature dictionary signV, therefore the chapter of each signature field
Mould image layer is also directed to the digital certificate of per pro people's authentication cited in the same signature dictionary signV, therefore same
Each seal pattern of a PDF document is all directed toward the same signer.Therefore, the present embodiment may be implemented in a PDF text
In shelves, when needing when multiple positions carry out stamped signature, multiple label are realized in the electronic signature that can only carry out a digital certificate
The purpose of the same signer of Zhang Zhixiang.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, the range for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
In short, the foregoing is merely presently preferred embodiments of the present invention, it is all according to equalization made by scope of the present invention patent
Variation and modification, shall all be covered by the patent of the invention.
Claims (10)
1. a kind of PDF signature method, which comprises the following steps:
Step 1: uploading PDF document, and shows that PDF signs the page
Step 2: dragging stamped signature is to stamped signature position；
Step 3: determining signature, obtains signature object set；
Step 4: parsing signature object set creates signature field；
Step 5: updating electronic signature, and generation signs documents.
2. PDF signature method according to claim 1, it is characterised in that:
In the step 2:
When the PDF document only needs single page stamped signature, dragging stamped signature is to stamped signature position；
When the PDF document needs multipage stamped signature, dragging stamped signature is to stamped signature position, and specified page number range；
When the PDF document needs keyword stamped signature, all positions for keyword occur are searched by input keyword and are sat
Mark, then drag stamped signature and wait for stamped signature position to these.
3. PDF signature method according to claim 2, it is characterised in that:
In the step 3:
Signature option is clicked, obtains the signature object set sent by front end from the background；
The signature object set includes several signature objects, and the signature object includes signature type, signs location information, with
And seal information.
4. PDF signature method according to claim 3, it is characterised in that:
In the step 4:
The content of each signature object is parsed, and according to the content creating signature field of the signature object；
The signature field includes chapter mould image layer and signature dictionary.
5. PDF signature method according to claim 4, it is characterised in that:
In the step 4:
The PDF document is loaded using Open Framework itext5, creates a signature dictionary signV；
The signature dictionary of each signature field is all directed toward the reference of the signature dictionary signV.
6. PDF signature method according to claim 5, it is characterised in that:
In the step 5:
It is signed electronically using digital certificate, and the result of electronic signature is updated to the signature dictionary signV, it is rear to generate
It signs documents.
7. a kind of PDF sealing system, using PDF signature method described in claim 1-6 come work, it is characterised in that:
The PDF sealing system includes file uploading module, and seal signs module, signs object acquisition module, signs object solution
Analyse module and digital certificate signature module；
The file uploading module is used to PDF document being uploaded to PDF sealing system；
The seal signature module is used to sign seal in the PDF document uploaded to stamped signature position；
The signature object acquisition module includes signature object, institute for obtaining signature object set, the signature object set
Signature object is stated as produced by seal signature module signature seal；
The signature analysis of object module is used to parse each signature object in the signature object set, and according to each label
The content creating signature field of object is affixed one's name to, the signature field includes signature dictionary；
The signature analysis of object module is also used to create a signature dictionary signV, and makes the signature of each signature field
Dictionary is all directed toward the reference of the signature dictionary signV；
The result of electronic signature is updated to the signature dictionary for signing electronically by the digital certificate signature module
signV。
8. PDF sealing system according to claim 7, it is characterised in that:
Each signature field further includes chapter mould image layer, and the chapter mould image layer includes seal pattern；
Each seal pattern is all directed toward electronic signature representated by the digital certificate of the signature dictionary signV reference.
9. PDF sealing system according to claim 7, it is characterised in that:
The signature analysis of object module is loaded the PDF document by using Open Framework itext5 and parses the PDF
Document.
10. PDF sealing system according to claim 7, it is characterised in that:
Signature object in the signature object set includes signature type, signs location information and seal information.
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| CN201910815681.XA CN110532811B (en) | 2019-08-30 | 2019-08-30 | PDF (Portable document Format) signature method and PDF signature system |
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| CN201910815681.XA CN110532811B (en) | 2019-08-30 | 2019-08-30 | PDF (Portable document Format) signature method and PDF signature system |
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| CN111797434A (en) * | 2020-05-22 | 2020-10-20 | 北京国电通网络技术有限公司 | File editing method and device |
| CN111723407A (en) * | 2020-06-24 | 2020-09-29 | 中国联合网络通信集团有限公司 | Multi-page signature system, method, apparatus, and computer-readable storage medium |
| CN111723407B (en) * | 2020-06-24 | 2023-12-22 | 中国联合网络通信集团有限公司 | Multi-page signature system, method, apparatus, and computer-readable storage medium |
| CN111832081A (en) * | 2020-07-21 | 2020-10-27 | 杭州天谷信息科技有限公司 | OFD quick signing method |
| CN111832080A (en) * | 2020-07-21 | 2020-10-27 | 杭州天谷信息科技有限公司 | Method for making electronic contract useless |
| CN111832010A (en) * | 2020-07-22 | 2020-10-27 | 上海绿安信息科技有限公司 | Electronic signature generation system applied to medicine management |
| CN112583603A (en) * | 2020-12-08 | 2021-03-30 | 上海市数字证书认证中心有限公司 | Visual signature method and device, electronic equipment and computer readable storage medium |
| CN112583603B (en) * | 2020-12-08 | 2022-07-12 | 上海市数字证书认证中心有限公司 | Visual signature method and device, electronic equipment and computer readable storage medium |
| CN113918059B (en) * | 2021-10-26 | 2023-11-28 | 国电南瑞科技股份有限公司 | Signature position positioning method and device for electronic cloud signature |
| CN113918059A (en) * | 2021-10-26 | 2022-01-11 | 国电南瑞科技股份有限公司 | Signature position positioning method and device of electronic cloud signature |
| CN115442143A (en) * | 2022-09-05 | 2022-12-06 | 开普数智科技(广东)有限公司 | Electronic signature method, device, equipment and readable medium |
| CN115442143B (en) * | 2022-09-05 | 2023-07-28 | 开普数智科技(广东)有限公司 | Electronic signature method, device, equipment and readable medium |
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