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https://stackoverflow.com/questions/29771477/how-to-read-password-protected-excel-files-using-poi-with-eevnt-model
I want to read password protected excel files (.xls and .xlsx) with Apache POI. I am not using the usermodel (org.apache.poi.ss.usermodel) but an Event API to process xls and xlsx files (to address the memory footprint issue).
https://poi.apache.org/apidocs/3.17/org/apache/poi/hssf/record/ProtectRecord.html
Description: defines whether a sheet or workbook is protected (HSSF DOES NOT SUPPORT ENCRYPTION) HSSF now supports the simple "protected" sheets (where they are not encrypted and open office et al ignore the password record entirely). REFERENCE: PG 373 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)
https://bz.apache.org/bugzilla/show_bug.cgi?id=60347
I have a password protected worksheet create with excel 95,97-2003 i have the password and i was trying to read this file in different ways Method 1: WorkbookFactory.create(inputStream, "password"); throws: org.apache.poi.EncryptedDocumentException: HSSF does not currently support CryptoAPI encryption Method 2: protected InputStream ...
https://bz.apache.org/bugzilla/show_bug.cgi?id=27548
The first record after the WRITEPROTECT that contains a String is the FONT record, but the font name cannot be read because the name and length are encrypted. POI does not support encryption and cannot read a workbook which is password protected. Try …
https://bz.apache.org/bugzilla/show_bug.cgi?id=59857
Interestingly the first encrypted records (even long ones) get de-/encrypted correctly, but starting with the FontRecords (with the xor-encryption-abc.xls) only one of the bytes differ. This also happens even when the whole record processing is bypassed and the plain/encrypted stream of …
http://apache-poi.1045710.n5.nabble.com/Bug-59857-New-Password-protected-files-with-quot-Microsoft-Enhanced-Cryptographic-Provider-v1-0-quot-td5723967.html
[Bug 59857] New: Password protected files with "Microsoft Enhanced Cryptographic Provider v1.0"
https://stackoverflow.com/questions/29771477/how-to-read-password-protected-excel-files-using-poi-with-eevnt-model?noredirect=1
I want to read password protected excel files (.xls and .xlsx) with Apache POI. I am not using the usermodel (org.apache.poi.ss.usermodel) but an Event API to process xls and xlsx files (to address the memory footprint issue).
http://apache-poi.1045710.n5.nabble.com/Will-poi-library-support-reading-encrypted-excel-file-td5720988.html
Will poi library support reading encrypted excel file?. Hi, I tried to read Excel files which are protected with password, but got the EncryptedDocumentException. Case 1: when reading .xlsx...
http://poi.apache.org/encryption.html
When encrypted, the zipped files will be stored within an OLE file in the EncryptedPackage stream. If you plan to use POI to actually generate encrypted documents, be aware not to use anything less than agile encryption, because RC4 is not really secure and ECB chaining is problematic too. Of course you'll need to make sure, that your clients ...
https://bz.apache.org/bugzilla/show_bug.cgi?id=35897
Based on FilePassRecord code,it appears that poi does NOT handle 2,3 or 4 (all of them are RC4 CryptoAPI encryption header structure). Any workarounds. As an interesting aside, when I google around, I don't see anyone having reported the EncryptedDocumentException: HSSF does not currently support CryptoAPI encryption.
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