CN111832081A - OFD quick signing method - Google Patents
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- CN111832081A CN111832081A CN202010706952.0A CN202010706952A CN111832081A CN 111832081 A CN111832081 A CN 111832081A CN 202010706952 A CN202010706952 A CN 202010706952A CN 111832081 A CN111832081 A CN 111832081A
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- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
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- 238000007796 conventional method Methods 0.000 description 1
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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
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Abstract
The invention provides an OFD quick signing method, which comprises the following steps: s1, logging in the electronic signature system by the user; s2, selecting an electronic seal for signing, dragging the electronic seal to a specified position, and repeating corresponding operations; s3, clicking to confirm signing, forming a list of signing information and packaging, and submitting the signing information list to a back end for processing; s4, analyzing the signing information list, inquiring and acquiring a specific electronic seal file according to the seal ID, and carrying out OFD signature on an OFD file to be signed; s5, abstracting the signature file, assembling data to be signed in a national secret format, performing electronic signature by using a corresponding digital certificate, assembling signature data in the national secret format, and generating a signature value file; and S6, compressing to generate the signed OFD file. The invention only carries out the hash abstract and the digital signature of all the files once, thereby improving the user experience, and each signature domain uses a real digital signature which accords with the OFD standard.
Description
Technical Field
The invention relates to an electronic signature method, in particular to an OFD quick signature method.
Background
The OFD is a domestic format file, is popularized and popular at present, and is widely used in the fields of the industries such as electronic invoices, file storage, electronic certificates and the like; the corresponding OFD signed scenarios and applications are also increasing. However, OFD signature technology is in the beginning of its work, and a relatively large number of technologies are now applied, namely fixed position single page stamping. The same user may need to stamp multiple locations at different locations on the OFD file; the conventional method is to cover one electronic signature and then cover the next electronic signature until all positions are covered with the electronic signatures.
The main defects are as follows: since each time an electronic signature is applied, all files inside the OFD need to be hashed and then signed repeatedly. The number M of the files in the OFD is related to the page number of the OFD and the elements of the OFD; if the number of OFDs is large, or the number of elements of the OFDs is large, the time for performing hash digest is long; if the seal needs to be carried out at N positions, the hash digests of M files and the signatures of N times need to be repeated for N times, so that the system is often overtime or long-time user waiting is caused, and the experience is very poor;
disclosure of Invention
The invention provides an OFD quick signing method, which solves the efficiency problem that sealing is required to be carried out at a plurality of positions of the same OFD file; and at the same time, to comply with the OFD digital certificate signing standard. The technical scheme is as follows:
an OFD quick signing method comprises the following steps:
s1, logging in the electronic signature system by a user, uploading the OFD file to be signed to the electronic signature system, and displaying a signature page;
s2, selecting the electronic seal for signing, dragging to the appointed position, and repeating the corresponding operation until the electronic seal for signing is placed at all the appointed positions;
s3, clicking to confirm signing, forming a list of signing information and packaging, wherein the signing information comprises signing types, seal IDs and specific positions of falling seals, and submitting the signing information list to a back end for processing;
s4, analyzing a signing information list, inquiring and acquiring a specific electronic seal file according to the seal ID, and carrying out OFD signature on the OFD file to be signed, wherein the OFD signature comprises an entry file Signaturexml, a signature file Signature.xml, a seal file seal.esl and a signature value SignValue.dat described by the signature;
s5, abstracting the signature file Signature.xml, assembling data to be signed in a national-secret format, carrying out electronic signature by using a corresponding digital certificate, assembling signature data in the national-secret format, and generating a signature value file SignValue.dat;
and S6, compressing to generate the signed OFD file.
Further, in step S2, the electronic seal can select a single-page seal, multiple-page seals, or a seal with a perforation.
Further, in step S3, the signature type includes a single page, multiple pages, and a seam, and the specific position includes a specific page number, an abscissa, and an ordinate.
Further, in step S4, the OFD signature includes the steps of:
s11: converting the electronic seal file and the specific positions of the dropped seals into OFD signature appearance StampAnnos, and constructing a list StampAnnos by a plurality of StampAnnos;
s12: decompressing the OFD compressed file, creating or updating an entry point file Signatures.xml described by the signature, creating a signature directory Sign _ N, creating a signature file Signature.xml, and writing the signature file seal.esl;
s13: a signature appearance node stampanot list stampannos is created inside the signature file,
s14: and simultaneously, carrying out file hash abstract on all files protected by the signature in the OFD compressed packet, generating an abstract node list References, and simultaneously writing a security algorithm provider, a signature algorithm and signature time into the files.
Xml defines the binary summary information of all the files protected by the current signature, specifies the appearance of the current signature, stampanot, and defines the node SignValue of the signature value file SignValue.
A digital signature can be associated with 1 or more signature appearances, or can be unassociated; when a plurality of positions need to be electronically signed, the electronic signatures are converted into the appearances of signatures with corresponding numbers, and meanwhile, the digital signatures point to the same, so that the file abstract and the signatures are only needed to be signed once.
The OFD quick signing method only carries out hash digests and digital signatures on all files once, improves user experience, and each signature domain uses a real digital signature, and accords with OFD standards.
Drawings
FIG. 1 is a schematic illustration of a current signature on a PDF document provided by an electronic contract;
FIG. 2 is a schematic diagram of an optimized signature of the present invention;
fig. 3 is an exemplary diagram of an OFD file opened with winrar;
FIG. 4 is a schematic flow chart of an embodiment of the present invention.
Detailed Description
As shown in fig. 1, in the original practice, assuming that 3 chapters need to be signed on a PDF document, OFD stamping needs to be performed three times, and each stamping needs to be performed with a digest of the OFD file and a digital signature. The signature information comprises a signature provider, a signature algorithm, signature time, a file abstract list and signature appearance, and the signature appearance can call a seal file.
As shown in fig. 2, the present invention optimizes the process of multiple signatures, and the optimized method is: and 3-time stamping is changed into 1-time stamping, the abstract and the digital signature of the OFD file are only carried out once, and 3 signature appearances corresponding to the 3-time stamping are converted into three signature appearances in the one-time stamping.
The OFD signature comprises an entry file signature. Xml defines the binary summary information of all the files protected by the current signature, designates the appearance StampAnnot of the current signature (the signature appearance refers to the specific sample presented by an electronic signature and includes information such as the position, page number, horizontal and vertical coordinates, length and width of the signature, and a seal picture of the signature), and defines the node SignValue pointing to the signature value file SignValue.dat of the current signature; one digital signature may or may not be associated with 1 or more signature appearances; when a plurality of positions need to be electronically signed, the electronic signatures are converted into the appearances of signatures with corresponding numbers, and meanwhile, the digital signatures point to the same, so that the file abstract and the signatures are only needed to be signed once.
Therefore, a user needs to stamp at a plurality of positions in one OFD file, such as stamping according to keyword positioning, multi-page stamping, perforation stamping and other scenes, if the positions needing to be stamped have a plurality of positions, multiple Hash abstracts and digital signatures need to be carried out, the flow is blocked due to the Hash abstracts and the signature efficiency, and the user experience is influenced. And the optimized process only carries out hash abstract and digital signature of all files once, so that the user experience is improved, and each signature domain uses a real digital signature and conforms to the OFD standard.
As shown in fig. 4, in a specific embodiment, the method comprises the following steps:
s1, logging in the electronic signature system by a user, uploading the OFD file to be signed to the electronic signature system, and displaying a signature page;
s2, selecting an electronic seal for signing, dragging the electronic seal to a specified position, and selecting a single-page seal, a multi-page seal and a joint seal; repeating the corresponding operation until the electronic seal for signing is placed at all the appointed positions;
and S3, clicking to confirm signing, packaging a list of signing information, wherein the signing information comprises signing types (types comprise single page, multiple pages and seal on the perforation), a seal ID, specific positions (specific page number, abscissa and ordinate) of falling seals and the like, and submitting the signing information list to a back end for processing.
S4, analyzing the signing information list, and inquiring and acquiring the specific electronic seal file (electronic seal data in a national seal format and the length and width of the seal) according to the seal ID. Converting the electronic seal file and the specific position of the seal drop into OFD signature appearance StampAnnot, and constructing a plurality of StampAnnos into a list
StampAnnos. Decompressing OFD compressed file, creating or updating signature description entry point file
Xml, creating a signature directory Sign _ N, creating a signature file signature xml, writing in a seal file seal, creating a signature appearance node StampAnnos list in the signature file, simultaneously performing file hash summarization on all files protected by signatures in an OFD compressed packet, generating a summary node list References, and simultaneously writing a security algorithm provider, a signature algorithm, signature time and the like in the files.
S5, abstracting the signature file Signature.xml, assembling the data to be signed in a national secret format (meeting the digital format requirement of an electronic signature in GBT 38540 and 2020 secure electronic signature password technical specification issued by the national secret agency), carrying out electronic signature by using a corresponding digital certificate, assembling the signature data in the national secret format, and generating a signature value file SignValue.dat.
S6, compressing and generating signed OFD file (though the suffix OFD file is OFD, but actually is a ZIP compressed file, and the compressed file is a stack of XML file and file directory, and fig. 3 is an example of opening OFD file with winrar).
Claims (6)
1. An OFD quick signing method comprises the following steps:
s1, logging in the electronic signature system by a user, uploading the OFD file to be signed to the electronic signature system, and displaying a signature page;
s2, selecting the electronic seal for signing, dragging to the appointed position, and repeating the corresponding operation until the electronic seal for signing is placed at all the appointed positions;
s3, clicking to confirm signing, forming a list of signing information and packaging, wherein the signing information comprises signing types, seal IDs and specific positions of falling seals, and submitting the signing information list to a back end for processing;
s4, analyzing a signing information list, inquiring and acquiring a specific electronic seal file according to the seal ID, and carrying out OFD signature on the OFD file to be signed, wherein the OFD signature comprises an entry file Signaturexml, a signature file Signature.xml, a seal file seal.esl and a signature value SignValue.dat described by the signature;
s5, abstracting the signature file Signature.xml, assembling data to be signed in a national-secret format, carrying out electronic signature by using a corresponding digital certificate, assembling signature data in the national-secret format, and generating a signature value file SignValue.dat;
and S6, compressing to generate the signed OFD file.
2. The OFD quick stick method according to claim 1, wherein: in step S2, the electronic seal can select a single-page seal, multiple-page seals, or a seal with a perforation.
3. The OFD quick stick method according to claim 1, wherein: in step S3, the signature types include single page, multiple pages, and a seam, and the specific position includes a specific page number, abscissa, and ordinate.
4. The OFD quick stick method according to claim 1, wherein: in step S4, the OFD signature includes the steps of:
s11: converting the electronic seal file and the specific positions of the dropped seals into OFD signature appearance StampAnnos, and constructing a list StampAnnos by a plurality of StampAnnos;
s12: decompressing the OFD compressed file, creating or updating an entry point file Signatures.xml described by the signature, creating a signature directory Sign _ N, creating a signature file Signature.xml, and writing the signature file seal.esl;
s13: a signature appearance node stampanot list stampannos is created inside the signature file,
s14: and simultaneously, carrying out file hash abstract on all files protected by the signature in the OFD compressed packet, generating an abstract node list References, and simultaneously writing a security algorithm provider, a signature algorithm and signature time into the files.
5. The OFD quick stick method according to claim 1, wherein: xml defines the binary summary information of all the files protected by the current signature, specifies the appearance of the current signature, stampanot, and defines the node SignValue pointing to the signature value file SignValue.
6. The OFD quick stick method according to claim 5, wherein: a digital signature can be associated with 1 or more signature appearances, or can be unassociated; when a plurality of positions need to be electronically signed, the electronic signatures are converted into the appearances of signatures with corresponding numbers, and meanwhile, the digital signatures point to the same, so that the file abstract and the signatures are only needed to be signed once.
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| CN202010706952.0A CN111832081B (en) | 2020-07-21 | 2020-07-21 | OFD quick signing method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112347493A (en) * | 2020-11-04 | 2021-02-09 | 杭州天谷信息科技有限公司 | Encryption, decryption and graying method for OFD (office file) |
| CN112732649A (en) * | 2020-12-21 | 2021-04-30 | 航天信息股份有限公司 | OFD document signing method, electronic device and medium |
| CN113541973A (en) * | 2021-09-17 | 2021-10-22 | 杭州天谷信息科技有限公司 | Electronic signature packaging method |
| CN113781015A (en) * | 2021-09-27 | 2021-12-10 | 深圳法大大网络科技有限公司 | File signing method and device, computer equipment and storage medium |
| CN114064621A (en) * | 2021-10-28 | 2022-02-18 | 江苏未至科技股份有限公司 | Method for judging repeated data |
| CN115455492A (en) * | 2022-09-30 | 2022-12-09 | 百望股份有限公司 | OFD file manufacturing method and device |
| CN116167090A (en) * | 2023-04-21 | 2023-05-26 | 云筑信息科技(成都)有限公司 | Method for batch processing of PDF file electronic signatures based on UKey |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112347493A (en) * | 2020-11-04 | 2021-02-09 | 杭州天谷信息科技有限公司 | Encryption, decryption and graying method for OFD (office file) |
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| CN113781015A (en) * | 2021-09-27 | 2021-12-10 | 深圳法大大网络科技有限公司 | File signing method and device, computer equipment and storage medium |
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| CN116167090A (en) * | 2023-04-21 | 2023-05-26 | 云筑信息科技(成都)有限公司 | Method for batch processing of PDF file electronic signatures based on UKey |
| CN116167090B (en) * | 2023-04-21 | 2023-08-22 | 云筑信息科技(成都)有限公司 | Method for batch processing of PDF file electronic signatures based on UKey |
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