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DynaPDF.CheckEmbeddedFileCheckSum
Checks the checksum for an embedded file.
| Component | Version | macOS | Windows | Linux | Server | iOS SDK |
| DynaPDF | 15.0 | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
MBS( "DynaPDF.CheckEmbeddedFileCheckSum"; PDF; Handle ) More
Parameters
| Parameter | Description | Example |
|---|---|---|
| The PDF reference returned from DynaPDF.New. | ||
| Handle | The index number for the embedded file. Range from 0 to DynaPDF.GetEmbeddedFileCount. | 0 |
Result
Returns status or error.
Description
Checks the checksum for an embedded file.Returns 1 for checksum okay, 0 for checksum invalid and -1 if no checksum is present.
You may detect bad bytes e.g. from a disk reading error or transmitting error.
Since the checksum is just MD5, a malicious actor could swap out the content of the embedded file and fill in a new correct checksum.
Examples
Query name, content and check checksum:
Set Variable [ $name ; Value: MBS( "DynaPDF.GetEmbeddedFile"; $PDF; $Index; "name" ) ]
Set Variable [ $file ; Value: MBS( "DynaPDF.GetEmbeddedFileAsContainer"; $PDF; $Index ) ]
Set Variable [ $checksumOkay ; Value: MBS( "DynaPDF.CheckEmbeddedFileCheckSum"; $PDF; $Index) ]
See also
Release notes
- Version 15.0
- Added DynaPDF.CheckEmbeddedFileCheckSum function.
Blog Entries
This function checks for a license.
Created 27th December 2024, last changed 31st December 2024
