A pdf file electronic signature method and device
An electronic signature and document technology, applied in computer security devices, electronic digital data processing, instruments, etc., can solve the problems of difficulty in signing or sealing, and easy forgery and tampering of signatures, so as to reduce the risk of forgery and tampering , has the effect of authenticity
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Embodiment 1
[0026] The embodiment of the present invention provides a PDF file electronic signature method, such as figure 1 As shown, the method includes:
[0027] Step 101, the client determines and parses the PDF file to be signed;
[0028] Step 102, the client sets signature attributes for the parsed PDF file to be signed according to a preset method, and obtains a new PDF file to be signed;
[0029] In an embodiment, the signature attribute includes a signature position and a picture displayed by the signature;
[0030] Step 103, the client parses the new PDF file to be signed to obtain the byte stream of the new PDF file to be signed, and determines the byte stream corresponding to the signature position in the byte stream of the new PDF file to be signed according to the preset signature algorithm, according to Obtain the byte stream of the new PDF file to be signed except the byte stream corresponding to the signature position in the preset method, and use the obtained byte stre...
Embodiment 2
[0045]Embodiments of the present invention provide a method for electronically signing PDF files, such as figure 2 As shown, the method includes:
[0046] Step 201, the client determines the PDF file to be signed;
[0047] In this embodiment, the client determines that the PDF file to be signed is specifically: the client obtains the PDF file imported by the user, and when it detects that the user performs a signature operation on the PDF file, it determines that the PDF file imported by the user is a PDF file to be signed .
[0048] Step 202, the client parses the PDF file to be signed, sets signature attributes on the parsed PDF file to be signed according to a preset method, and obtains a new PDF file to be signed;
[0049] In this embodiment, specifically, the client parses the PDF file to be signed as follows: the client parses the root directory object of the PDF file through the parser, and obtains the interactive form object according to the root directory object; ...
Embodiment 3
[0126] The embodiment of the present invention provides a PDF file electronic signature device, such as image 3 As shown, the device includes:
[0127] Determine the parsing module 11, for determining and parsing the PDF file to be signed;
[0128] The setting module 12 is used to set the signature attribute for the PDF file to be signed that is analyzed by the analysis module 11 according to a preset method, so as to obtain a new PDF file to be signed; wherein, the signature attribute includes a signature position and a picture displayed by the signature;
[0129] Determining the parsing module 11 is also used to parse the new PDF file to be signed to obtain the byte stream of the new PDF file to be signed, and determine the byte corresponding to the signature position in the byte stream of the new PDF file to be signed according to the preset signature algorithm flow;
[0130] Obtaining module 13, is used for acquiring the byte stream except the byte stream corresponding ...
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