CN111797434A - File editing method and device - Google Patents

Abstract

One or more embodiments of this specification provide a method and device for editing a file, the method includes electronically signing and stamping the file; obtaining the to-be-signed data of the file and the official seal list field of the electronically signed and stamped official seal; The CA interface is called to digitally sign the data to be signed at the official seal list field and generate a signed file. In this method, the data to be signed of the file is obtained by itself, instead of using a third-party interface to obtain the data to be signed, and in the process of obtaining the data to be signed, the file structure is parsed, a digital certificate is added to the official seal list field, and the signature The structure is completely independent for assembly and processing, without relying on third-party interfaces, which is more convenient in function expansion and optimization, and the software has less dependence on the operating environment, and users can use it more quickly.

Description

A file editing method and device

technical field

One or more embodiments of this specification relate to the technical field of file processing, and in particular, to a file editing method and apparatus.

Background technique

At present, in the electronic bidding industry, traditional bidding tools are mainly developed in languages such as C/C+ or C#. In the process of digitally signing bidding documents, the acquisition of the content to be signed in the bidding documents mainly relies on calling a third-party interface Therefore, it is too dependent on the system environment and cannot run across platforms, which is not conducive to the expansion of functions.

SUMMARY OF THE INVENTION

In view of this, the purpose of one or more embodiments of the present specification is to propose a file editing method and apparatus to solve the problem of excessively relying on invoking a third-party interface when digitally signing bidding documents.

Based on the above purpose, a first aspect of one or more embodiments of this specification provides a file editing method, the method comprising:

Electronically sign and seal the documents;

Obtain the data to be signed of the document and the official seal list field of the electronic signature and official seal;

The CA interface is called to digitally sign the data to be signed at the official seal list field and generate a signed file.

Optionally, the acquisition of the to-be-signed data of the document and the official seal list field of the electronically signed official seal includes:

Obtain each structural object and a cross-reference table of the file, wherein the cross-reference table stores position information of the structural objects in the file;

Obtain the official seal list field of the electronically signed official seal in the document to determine the position for digital signature;

Set the required digital signature format in the document;

Determine the signature reserved byte space in the file, wherein the signature reserved byte space is used to store the returned signed data to be signed;

updating the structure objects and the offset addresses of the structure objects;

Acquire the data to be signed of the file according to the updated offset addresses of the structural objects.

Optionally, the calling CA interface digitally signs the data to be signed at the official seal list field and generates a signed file, including:

Call the CA interface to digitally sign the data to be signed at the official seal list field;

The signed data to be signed is written back into the signature reserved byte space to generate a signed file.

Optionally, the electronically signing and stamping the document with an official seal includes:

Obtain the official seal of the unit, and convert the official seal of the unit into an official seal image object;

Binding the official seal picture object as the current mouse shape;

In response to the operation of the user clicking the mouse, the actual stamping position coordinates of the document requirements are determined;

According to the coordinates of the actual stamping position, the official stamp picture object is written into the file.

Optionally, in response to the operation of the user clicking the mouse, determining the actual stamping position coordinates of the document requirements, including:

In response to the operation of the user clicking the mouse, obtain the window coordinates of the position where the user clicks;

Get the user's screen resolution;

According to the window coordinates, the screen resolution, the horizontal scroll bar position and the vertical scroll bar position, the actual stamping position coordinates of the document requirement are determined.

Optionally, before the step of writing the official seal picture object into the file according to the actual seal position coordinates, the method further includes:

Judging whether the coordinates of the actual stamping position exceed the page coordinates of the file;

If so, then determine the actual seal position coordinates again according to the page coordinate value of the document and the size of the official seal picture object;

If not, execute the step of writing the official seal picture object into the file according to the coordinates of the actual stamping position.

Optionally, before the step of electronically signing and stamping the document with an official seal, the method further includes

In response to the user's operation to open the file, the file is displayed on the display interface.

Optionally, the method further includes:

Upload the signed file to the server.

Optionally, uploading the signed file to the server includes:

Symmetrically encrypt the signed file to generate a first ciphertext;

performing asymmetric encryption on the first ciphertext to generate a second ciphertext;

performing a data signature on the second ciphertext to generate signature data;

uploading the second ciphertext and the signature data to a server, so that the server performs signature verification on the second ciphertext and the signature data;

When the signature verification fails, repeat the above steps until the signed file is successfully uploaded to the server.

Based on the same purpose, a second aspect of one or more embodiments of this specification provides a file editing apparatus, the apparatus comprising:

The electronic signature and official seal module is used to electronically sign and affix the official seal to the document;

A to-be-signed data acquisition module, used for acquiring the to-be-signed data of the document and the official seal list field of the electronic signature;

The digital signature module is used to call the CA interface to digitally sign the data to be signed at the official seal list field and generate a signed file.

Optionally, the to-be-signed data acquisition module is specifically used for:

Obtain each structural object and a cross-reference table of the file, wherein the cross-reference table stores position information of the structural objects in the file;

Obtain the official seal list field of the electronically signed official seal in the document to determine the position for digital signature;

Set the required digital signature format in the document;

Determine the signature reserved byte space in the file, wherein the signature reserved byte space is used to store the returned signed data to be signed;

updating the structure objects and the offset addresses of the structure objects;

Acquire the data to be signed of the file according to the updated offset addresses of the structural objects.

Optionally, the digital signature module is specifically used for:

Call the CA interface to digitally sign the data to be signed at the official seal list field;

The signed data to be signed is written back into the signature reserved byte space to generate a signed file.

Optionally, the electronic signature and seal module includes:

Obtain the official seal unit, which is used to obtain the official seal of the unit, and convert the official seal of the unit into an official seal image object;

an official seal image object binding unit, used for binding the official seal image object to the current mouse shape;

The actual stamping position coordinate determination unit is used to determine the actual stamping position coordinates required by the document in response to the operation of the user clicking the mouse;

The official seal image object writing unit is used for writing the official seal image object into the file according to the coordinates of the actual stamping position.

Optionally, a unit for determining the coordinates of the actual stamping position, which is specifically used for:

In response to the operation of the user clicking the mouse, obtain the window coordinates of the position where the user clicks;

Get the user's screen resolution;

According to the window coordinates, the screen resolution, the horizontal scroll bar position and the vertical scroll bar position, the actual stamping position coordinates of the document requirement are determined.

Optionally, the electronic signature and seal module also includes:

A judging unit, for judging whether the actual stamping position coordinates exceed the page coordinate value of the document; if so, the actual stamping position coordinate determining unit is again based on the page coordinate value of the document and the size of the official stamp picture object Determine the actual stamping position coordinates; if not, the official stamp picture object writing unit writes the official stamp picture object into the file according to the actual stamping position coordinates.

Optionally, the apparatus further includes a file display module, configured to display the file on the display interface in response to the user's operation of opening the file.

Optionally, the apparatus further includes a file uploading module for uploading the signed file to the server.

Optionally, the file uploading module is specifically configured to symmetrically encrypt the signed file to generate a first ciphertext;

performing asymmetric encryption on the first ciphertext to generate a second ciphertext;

performing a data signature on the second ciphertext to generate signature data;

uploading the second ciphertext and the signature data to a server, so that the server performs signature verification on the second ciphertext and the signature data;

When the signature verification fails, repeat the above steps until the signed file is successfully uploaded to the server.

As can be seen from the above, the file editing method and device provided by one or more embodiments of this specification firstly electronically sign and seal the file, and then obtain the data to be signed of the file and the official seal list field of the electronically signed official seal. , call the CA interface to digitally sign the data to be signed in the official seal list field, and finally generate the signed file; the data to be signed of the file is obtained by itself, not through a third-party interface to obtain the data to be signed. During the data process, the file structure is parsed, a digital certificate is added to the official seal list field, and the signature structure is completely assembled and processed independently, without relying on third-party interfaces, which is more convenient in function expansion and optimization, and the software has little dependence on the operating environment, users Faster to use.

Description of drawings

In order to more clearly illustrate one or more embodiments of the present specification or the technical solutions in the prior art, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art. Obviously, in the following description The accompanying drawings are only one or more embodiments of the present specification, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic flowchart of a file editing method provided by one or more embodiments of this specification;

FIG. 2 provides an explanation of step S12 in one or more embodiments of the present specification;

FIG. 3 is a schematic structural diagram of a file editing apparatus according to one or more embodiments of the present specification.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to the specific embodiments and the accompanying drawings.

It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of the present specification shall have the usual meanings understood by those with ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and similar terms used in one or more embodiments of this specification do not denote any order, quantity, or importance, but are merely used to distinguish the various components.

At present, in the electronic bidding industry, traditional bidding tools are mainly developed in languages such as C/C+ or C#. In the process of digitally signing bidding documents, the acquisition of the content to be signed in the bidding documents mainly relies on calling a third-party interface Therefore, it is too dependent on the system environment and cannot run across platforms, which is not conducive to the expansion of functions.

In order to solve the above problems, this specification provides a file editing method and device. First, the file is electronically signed and sealed, and then the data to be signed and the official seal list field of the electronically signed and sealed official seal are obtained, and the CA interface is called in the official seal list. At the domain, the data to be signed is digitally signed, and finally a signed file is generated. The method and device can be applied to computers, tablet computers, smart phones, etc., which are not specifically limited.

For ease of understanding, the file editing method is described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic flowchart of a file editing method provided by this specification; as shown in Fig. 1, the method includes:

S11. Electronically sign and seal the document;

S12. Obtain the data to be signed of the document and the official seal list field of the electronically signed official seal

S13, calling the CA interface to digitally sign the data to be signed at the official seal list field and generate a signed file.

In practical applications, the documents may be bidding documents, financial reports, audit reports, etc., which are not specifically limited. The data to be signed refers to the content contained in the file that needs to be signed. The official seal list field of the electronic signature and official seal is the address offset of the official seal of the electronic signature, which refers to the position of the official seal of the electronic signature in the document.

After the electronic device executing the method (hereinafter referred to as the electronic device) obtains the file, firstly electronically sign and seal the file, then obtain the official seal list field of the electronically signed and sealed official seal, and obtain the data to be signed in the file; obtain After the official seal list field of the electronic signature and the official seal and the data to be signed, call the CA interface to digitally sign the to-be-signed data at the position of the official seal list field. After the digital signature is completed, a signed file is generated to complete the electronic signature and official seal and The process of digital signature.

The process of electronically signing the official seal and the process of obtaining the data to be signed will be explained in detail in the subsequent process, and will not be repeated here.

It can be understood that this electronic device completes the electronic signature and official seal of the file by itself, and the data to be signed is also obtained by itself, instead of obtaining the data to be signed through a third-party interface. In addition, in the process of obtaining the data to be signed, the file structure is Perform analysis, add a digital certificate to the official seal list field, and assemble and process the signature structure completely independently, without relying on third-party interfaces, which is more convenient in function expansion and optimization, and the software has less dependence on the operating environment, making it faster for users to use.

FIG. 2 provides an explanation of step S12 in this specification; in practical applications, in order to edit the file, after the file is electronically signed and sealed, it is necessary to continue to obtain the data to be signed of the file and the electronic signature and seal. Then, as shown in Figure 2, in some possible implementations, obtain the data to be signed of the file and the official seal list field of the electronic signature, including:

S21. Obtain each structural object and a cross-reference table of the file, wherein the cross-reference table stores position information of each structural object in the file.

In order to obtain each structural object of the file and the offset address of each structural object, first obtain the trailer file tail object, the number of Size document objects and the Root root object, as well as the cross-reference table that records the relative position of each structural object in the file. The offset address of the cross-reference table can be obtained to obtain the document position at the beginning of the cross-reference table, and then the relative address of each structural object in the file can be obtained according to the position information of each structural object in the cross-reference table, and then the relative address of each structural object can be accessed. Structure object. The offset address is the offset of an address in the segment relative to the segment head address, and the relative address is the segment head address + offset address.

S22. Obtain the official seal list field of the electronically signed official seal in the document, so as to determine the position for digital signature.

In practical applications, after electronically signing and affixing the official seal to the document, a digital signature needs to be performed at the place where the official seal is electronically signed. The official seal list field for electronic signatures and official seals.

In order to obtain the official seal list field of the electronic signature and official seal in the file, you can first obtain the offset address of the AcroForm object, and obtain the official seal list of Fields according to the offset address of the AcroForm object; then calculate the address offset of the page Annots, the obtained The address offset of the page Annots is written into the Fields official seal list data, the address offset of the AcroForm document interaction dictionary object is calculated again, and the SigFlags signature field is set.

S23. Set a digital signature format required in the file.

In practical applications, before digitally signing the content to be signed in the file, the digital signature format required in the file needs to be preset; then, the signature processing program of the Filter object can be set to Adobe.PPKLite, the public key of the SubFilter object The cryptographic signature definition value is set to adbe.pkcs7.detached.

S24. Determine the reserved byte space for the signature in the file, where the reserved byte space for the signature is used to store the returned signed data to be signed.

In practical applications, in order to store the signed data to be signed, it is necessary to determine the reserved byte space for the signature in the file in advance; then, the reserved byte range space value can be calculated and written into the ByteRange array, where the Contents signature is reserved. The byte space exactly matches the range space specified in ByteRange, supplemented with the specified length of 0 bytes.

S25. Update each structural object and the offset address of each structural object.

In practical applications, in order to update each structure object and the offset address of each structure object, you can first write the compression algorithm of the stream object as the zip compression algorithm, and then write the resource page to include the resource style. The address offset is written into the cross-reference table, the trailer information is updated, the length of all bytes except the reserved byte space of the signature is obtained, and the byte range of the ByteRange is calculated.

S26: Acquire the data to be signed of the file according to the updated offset addresses of each structural object.

In practical applications, after updating each structural object and the offset address of each structural object, the data to be signed of the file can be further calculated according to the updated offset address of each structural object.

It can be understood that the electronic device obtains the content to be signed in the file by itself, instead of obtaining the data to be signed through a third-party interface, and in the process of obtaining the data to be signed, the file structure is parsed and added to the official seal list field. The digital certificate and signature structure are completely independently assembled and processed, without relying on third-party interfaces, which is more convenient in function expansion and optimization, and the software has less dependence on the operating environment, and users can use it more quickly.

In practical applications, after obtaining the data to be signed and determining the official seal list field of the electronic signature and the official seal, the data to be signed can be digitally signed; then, in some possible implementations, the CA interface is called to treat the signature in the official seal list field. The data is digitally signed and a signed file is generated, including:

Call the CA interface to digitally sign the data to be signed in the official seal list field;

Write back the signed data to be signed into the reserved byte space for signature to generate a signed file.

In order to digitally sign the data to be signed, after obtaining the data to be signed in the file and determining the official seal list field of the electronic signature and the official seal, you can first call the CA interface to digitally sign the data to be signed in the file at the official seal list field, and obtain the signature Then, the signed data to be signed is written back to the signature reserved byte space specified by ByteRange, that is, the Contents key, to regenerate the signed file.

In practical applications, before digitally signing the data to be signed, the document may be electronically signed and sealed; then, in some possible implementations, the document may be electronically signed and sealed, including:

Obtain the official seal of the unit, and convert the official seal of the unit into an official seal image object;

Bind the official seal image object to the current mouse shape;

In response to the operation of the user clicking the mouse, determine the actual stamping position coordinates of the document requirements;

According to the actual stamp position coordinates, the official stamp image object is written into the file.

In practical applications, when electronically signing and stamping a document, you can only stamp a certain page in the document, or you can stamp multiple pages in the document in batches. For example, you can stamp 6 pages, 8 pages in the document Pages or 10 pages to be stamped, there is no specific limitation.

When the user chooses to stamp a single page of a page in the file, after the user selects a page and selects specific coordinates, and clicks OK, the electronic stamp can only be placed on the specified coordinates in the selected page. Official seal.

When the user chooses to stamp multiple pages in the file in batches, the user can fill in the page number range in the page number range dialog box that pops up on the interface of this electronic device, and select the coordinate position of the electronic stamp, and then click OK, then you can The electronic official seal shall be affixed to the same coordinate position within the specified page number range.

After the user selects a single-page seal or batch seal, the electronic device can first call the third-party U-shield interface to obtain the unit's official seal in the current uKey in response to the user's operation, and then convert the obtained unit's official seal into an official seal image object. The official seal picture object is bound to the current mouse shape, and the user can perform the stamping operation when the user clicks the mouse, which improves the user experience.

When the user clicks the mouse, the electronic device responds to the user's operation to determine the actual stamping position coordinates required by the document; in order to obtain the actual stamping position coordinates required by the document, the electronic device first responds to the user's operation of clicking the mouse, obtains The window coordinates of the user's click position, and then the user's screen resolution is obtained. According to the window coordinates, screen resolution, horizontal scroll bar position and vertical scroll bar position of the user's click position, the actual stamp position coordinates of the file requirements are determined.

After determining the actual stamping position coordinates of the document requirements, according to the actual stamping position coordinates of the requirements, write the official stamp image object into a certain page of the document or within the specified page number range of the document to complete the electronic signature and official stamping of the document.

In practical applications, after determining the actual stamping position coordinates required by the file according to the click window coordinates, screen resolution, horizontal scroll bar position and vertical scroll bar position, it can be further judged whether the obtained actual stamping position coordinates are feasible; then , in some possible implementations, before the step of writing the official seal image object into the file according to the actual stamping position coordinates, the method further includes:

Determine whether the actual stamp position coordinates exceed the page coordinates of the file;

If yes, then determine the actual seal position coordinates again according to the page coordinate value of the file and the size of the official seal image object;

If not, execute the steps of writing the official seal image object into the file according to the actual stamping position coordinates.

In one case, when the coordinates of the actual stamping position exceed the page coordinates of the document, it indicates that the actual stamping position falls outside the document page; then the actual stamping position needs to be determined again according to the page coordinates of the document and the size of the official stamp image object. To ensure that the re-determined coordinates of the actual stamping position do not exceed the page coordinates of the document, that is, the actual stamping position falls within the page of the document. After the actual stamping position coordinates are re-determined, according to the re-determined actual stamping position coordinates, the official stamp image object is written into a certain page of the document or within the specified page number range of the document.

In one case, when the actual stamping position coordinates do not exceed the page coordinates of the file, it means that the actual stamping position falls within the file page, and the official stamp image object can be written into the file directly according to the actual stamping position coordinates. within a page or within a specified range of document page numbers.

It is understandable that, after calculating the actual stamping position coordinates required for obtaining the document, first determine whether the actual stamping position coordinates exceed the document page coordinate value, that is, ensure that the actual stamping position coordinates fall within the document page, and ensure that the electronic signature is stamped with the official seal. Effective and improve editing accuracy.

In practical applications, in order to edit a file, the file needs to be displayed first; then, in some possible implementations, before the step of electronically signing and sealing the file, the method further includes:

In response to the user's operation of opening the file, the file is displayed on the display interface.

In practical applications, in order to edit a file, the user opens the file to be edited, and then the electronic device determines how to display the file on the display interface according to the file size.

In one case, when the file size is less than or equal to 10 pages, thumbnails of all page numbers of the file can be displayed, and the current page of the file can be displayed.

In one case, when the file size is larger than 10 pages, the thumbnails of the first 10 pages of the file can be displayed first. When scrolling down with the mouse wheel, the electronic device continues to load the file page and displays the content larger than 10 pages. You can also view the document structure according to the directory structure, page jump, previous page, next page, etc., or jump to the specified page for operation, and quickly display the file, which greatly improves the user experience.

In practical applications, after the editing of the file is completed, the file can be further processed; then, in some possible implementations, the method further includes:

Upload the signed file to the server.

During the file uploading process, in order to ensure the security of the file and the file is not arbitrarily tampered with, the method of encrypting the file can be used to ensure the security of the file during the uploading process; then, in some possible implementations, the signature After uploading the files to the server, including:

Symmetrically encrypt the signed file to generate the first ciphertext;

Perform asymmetric encryption on the first ciphertext to generate the second ciphertext;

Perform data signature on the second ciphertext to generate signature data;

uploading the second ciphertext and the signature data to the server, so that the server can perform signature verification on the second ciphertext and the signature data;

When the signature verification fails, repeat the above steps until the signed file is successfully uploaded to the server.

In practical applications, data signature is performed on the second ciphertext, and while the signature data is generated, the signed digest data will also be generated; after uploading the second ciphertext and the signature data to the server, the server will The text generates the digest data of the second ciphertext again, and then verifies whether the digest data of the second ciphertext matches the signed digest data.

If the digest data of the second ciphertext matches the digest data of the signature, the signature verification is passed, the server stores the second ciphertext, and the file is uploaded successfully.

If the second ciphertext is tampered with during the file uploading process, the digest data of the second ciphertext does not match the signed digest data, and the signature verification fails. The server will feed back the verification failure information to the electronic device. If the verification fails, the electronic device will repeat the above steps and re-upload the file to the server until the signature verification is passed, and the long-term file transfer is successful.

It can be understood that, in the process of uploading the file to the server, the upload is performed in an encrypted manner, which ensures that the file is not tampered with during the uploading process, and improves the security of the above-mentioned process of the file.

It should be noted that the methods of one or more embodiments of this specification may be executed by a single device, such as a computer or a server. The method in this embodiment can also be applied in a distributed scenario, and is completed by the cooperation of multiple devices. In the case of such a distributed scenario, one device among the multiple devices may only execute one or more steps in the method of one or more embodiments of the present specification, and the multiple devices may perform operations on each other. interact to complete the described method.

The foregoing describes specific embodiments of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that in the embodiments and still achieve desirable results. Additionally, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

FIG. 3 is a schematic structural diagram of a file editing device provided by this specification; as shown in FIG. 2 , the device includes:

The electronic signature and official seal module 31 is used to electronically sign and seal the document;

The data to be signed acquisition module 32 is used to acquire the data to be signed of the file and the official seal list field of the electronic signature and official seal;

The digital signature module 33 is used to call the CA interface to digitally sign the data to be signed at the official seal list field and generate a signed file.

In a possible implementation, the to-be-signed data acquisition module 32 is specifically configured to:

Obtain each structural object and a cross-reference table of the file, wherein the cross-reference table stores the position information of each structural object in the file;

Obtain the official seal list field of the electronically signed official seal in the document to determine the location of the digital signature;

Set the required digital signature format in the file;

Determine the signature reserved byte space in the file, wherein the signature reserved byte space is used to store the returned signed data to be signed;

Update each structure object and the offset address of each structure object;

According to the updated offset address of each structural object, the data to be signed of the file is obtained.

In a possible implementation manner, the digital signature module 33 is specifically used for:

Call the CA interface to digitally sign the data to be signed in the official seal list field;

Write back the signed data to be signed into the reserved byte space for signature to generate a signed file.

In a possible implementation, the electronic signature and seal module 31 includes:

Get the official seal unit, which is used to obtain the official seal of the unit, and convert the official seal of the unit into an official seal image object;

The official seal image object binding unit is used to bind the official seal image object to the current mouse shape;

The actual stamping position coordinate determination unit is used to determine the actual stamping position coordinates required by the document in response to the operation of the user clicking the mouse;

The official seal image object writing unit is used to write the official seal image object into the file according to the actual stamping position coordinates.

In a possible implementation, the actual stamping position coordinate determination unit is specifically used for:

In response to the operation of the user clicking the mouse, obtain the window coordinates of the position where the user clicks;

Get the user's screen resolution;

According to the window coordinates, screen resolution, horizontal scroll bar position and vertical scroll bar position, determine the actual stamp position coordinates of the file requirements.

In a possible implementation, the electronic signature and seal module 31 further includes:

The judgment unit is used to judge whether the actual stamping position coordinates exceed the page coordinate value of the document; if so, the actual stamping position coordinate determination unit determines the actual stamping position coordinates again according to the page coordinate value of the document and the size of the official stamp image object; if If not, the official seal image object writing unit writes the official seal image object to the file according to the actual stamping position coordinates.

In a possible implementation manner, the apparatus further includes a file display module (not shown in the figure), configured to display the file on the display interface in response to the user's operation of opening the file.

In a possible implementation manner, the apparatus further includes a file uploading module (not shown in the figure) for uploading the signed file to the server.

In a possible implementation, the file uploading module is specifically configured to symmetrically encrypt the signed file to generate the first ciphertext;

Perform asymmetric encryption on the first ciphertext to generate the second ciphertext;

Perform data signature on the second ciphertext to generate signature data;

uploading the second ciphertext and the signature data to the server, so that the server can perform signature verification on the second ciphertext and the signature data;

When the signature verification fails, repeat the above steps until the signed file is successfully uploaded to the server.

For the convenience of description, when describing the above device, the functions are divided into various modules and described respectively. Of course, when implementing one or more embodiments of this specification, the functions of each module may be implemented in one or more software and/or hardware.

The apparatuses in the foregoing embodiments are used to implement the corresponding methods in the foregoing embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

It should be understood by those of ordinary skill in the art that the discussion of any of the above embodiments is only exemplary, and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; under the spirit of the present disclosure, the above embodiments or Technical features in different embodiments may also be combined, steps may be carried out in any order, and there are many other variations of the different aspects of one or more embodiments of this specification as described above, which are not in detail for the sake of brevity supply.

Furthermore, devices may be shown in block diagram form in order to avoid obscuring one or more embodiments of this description, and this also takes into account the fact that details regarding the implementation of such block diagram devices are highly dependent on the implementation of the invention (ie, these details should be well within the understanding of those skilled in the art) of the platform describing one or more embodiments. Where specific details (eg, circuits) are set forth to describe exemplary embodiments of the present disclosure, it will be apparent to those skilled in the art that these specific details may be used without or with variations One or more embodiments of this specification are implemented below. Accordingly, these descriptions are to be considered illustrative rather than restrictive.

Although the present disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations to these embodiments will be apparent to those of ordinary skill in the art from the foregoing description.

The embodiment or embodiments of this specification are intended to cover all such alternatives, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of the present specification should be included within the protection scope of the present disclosure.

Claims (10)

1. a file editing method, is characterized in that, described method comprises: Electronically sign and seal the documents; Obtain the data to be signed of the document and the official seal list field of the electronic signature and official seal; The CA interface is called to digitally sign the data to be signed at the official seal list field and generate a signed file. 2. file editing method according to claim 1, is characterized in that, described obtaining the data to be signed of described file and the official seal list field of described electronic signature seal, comprising: Obtain each structural object and a cross-reference table of the file, wherein the cross-reference table stores position information of the structural objects in the file; Obtain the official seal list field of the electronically signed official seal in the document to determine the position for digital signature; Set the required digital signature format in the document; Determine the signature reserved byte space in the file, wherein the signature reserved byte space is used to store the returned signed data to be signed; updating the structure objects and the offset addresses of the structure objects; Acquire the data to be signed of the file according to the updated offset addresses of the structural objects. 3. file editing method according to claim 2, is characterized in that, described calling CA interface carries out digital signature to described data to be signed at described official seal list field place and generates the file after signature, comprising: Call the CA interface to digitally sign the data to be signed at the official seal list field; The signed data to be signed is written back into the signature reserved byte space to generate a signed file. 4. file editing method according to claim 1, is characterized in that, the described file is electronically signed and sealed, comprising: Obtain the official seal of the unit, and convert the official seal of the unit into an official seal image object; Binding the official seal picture object as the current mouse shape; In response to the operation of the user clicking the mouse, the actual stamping position coordinates of the document requirements are determined; According to the coordinates of the actual stamping position, the official stamp picture object is written into the file. 5. The file editing method according to claim 4, wherein, in response to the operation of the user clicking the mouse, determining the actual stamping position coordinates of the file requirements, comprising: In response to the operation of the user clicking the mouse, obtain the window coordinates of the position where the user clicks; Get the user's screen resolution; According to the window coordinates, the screen resolution, the horizontal scroll bar position and the vertical scroll bar position, the actual stamping position coordinates of the document requirement are determined. 6. The file editing method according to claim 4, characterized in that, before the step of writing the official seal picture object into the file according to the actual seal position coordinates, the method further comprises: Judging whether the coordinates of the actual stamping position exceed the page coordinates of the file; If so, then determine the actual seal position coordinates again according to the page coordinate value of the document and the size of the official seal picture object; If not, execute the step of writing the official seal picture object into the file according to the coordinates of the actual stamping position. 7. The file editing method according to claim 1, wherein, before the step of electronically signing and stamping the file, the method further comprises: In response to the user's operation to open the file, the file is displayed on the display interface. 8. The file editing method according to claim 1, wherein the method further comprises: Upload the signed file to the server. 9. The file editing method according to claim 8, wherein the uploading the signed file to the server comprises: Symmetrically encrypt the signed file to generate a first ciphertext; performing asymmetric encryption on the first ciphertext to generate a second ciphertext; performing a data signature on the second ciphertext to generate signature data; uploading the second ciphertext and the signature data to a server, so that the server performs signature verification on the second ciphertext and the signature data; When the signature verification fails, repeat the above steps until the signed file is successfully uploaded to the server. 10. A file editing device, comprising: The electronic signature and official seal module is used to electronically sign and affix the official seal to the document; A to-be-signed data acquisition module, used for acquiring the to-be-signed data of the document and the official seal list field of the electronic signature; The digital signature module is used to call the CA interface to digitally sign the data to be signed at the official seal list field and generate a signed file.

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