Update Rust crate lopdf to 0.40

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
lopdf	dependencies	minor	0.32 → 0.40

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Release Notes

J-F-Liu/lopdf (lopdf)

v0.40.0

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v0.39.0: 0.39.0

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What's Changed

Improvements

• Add pdf decryption support that derived from pdftk by @​Mon-ius in #​443
• Add font embedding support to Document API #​219 by @​Rayato159 in #​439
• Add load_with_password for encrypted PDFs by @​vysakh0 in #​455
• Replace O(n×m) search_substring with O(n) linear algorithm by @​withzombies in #​460
• Add load_metadata() by @​abimaelmartell in #​459
• Support encrypted PDFs in metadata extraction API by @​abimaelmartell in #​461

Fixes

• Fix font resource linkage missed in PR #​439 by @​Rayato159 in #​444
• Fix Handle Byte Order Marks in CMaps by @​CryZe in #​450
• Fixed parsing of empty bfrange / bfchar sections in ToUnicode CMaps by @​RubyBit in #​456
• Fix allow 'length' entry to be present for V=1 encryption by @​lukaszgemborowski in #​457
• Fix get_page_images: do not fail if page does not contain XObject by @​lukaszgemborowski in #​458

Thanks a lot to the new contributors:

• @​Rayato159 made their first contribution in #​439
• @​CryZe made their first contribution in #​450
• @​vysakh0 made their first contribution in #​455
• @​RubyBit made their first contribution in #​456
• @​lukaszgemborowski made their first contribution in #​457
• @​withzombies made their first contribution in #​460
• @​abimaelmartell made their first contribution in #​459

v0.38.0

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Add

• Add enhanced PDF decryption support for encrypted documents with empty passwords
• Add automatic decryption during document loading for better pdftk compatibility
• Add raw object extraction before parsing to handle encrypted content
• Add support for decrypting PDFs with compressed object streams
• Add comprehensive test suite for PDF decryption functionality
• Add assets/encrypted.pdf test file for decryption testing
• Add examples demonstrating decryption capabilities (test_decryption.rs, verify_decryption.rs)

Enhance

• Enhance Reader::read() to detect and handle encrypted PDFs automatically
• Enhance document loading to attempt empty password authentication by default
• Enhance object processing to decrypt objects after parsing
• Enhance support for encrypted PDFs containing object streams

Fix

• Fix encrypted object parsing by extracting raw bytes before decryption
• Fix object stream handling in encrypted documents
• Fix decryption workflow to match pdftk's approach

Implementation Details

• Modified src/reader.rs to add load_encrypted_document() method
• Added extract_raw_object() method for raw byte extraction
• Added parse_raw_object() method for parsing extracted bytes
• Store raw object bytes in Reader::raw_objects field for deferred decryption
• Process compressed objects from object streams after decryption

v0.37.0

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Add

• Add complete PDF object streams write support enabling 11-61% file size reduction (#XXX)
• Add save_modern() method for easy object streams and cross-reference streams usage
• Add SaveOptions struct with builder pattern for configuring compression settings
• Add ObjectStreamBuilder for creating object streams programmatically
• Add cross-reference stream support for PDF 1.5+ compliance
• Add replace_partial_text() function for partial text replacement in PDFs
• Add comprehensive test suite with 50+ tests for object streams functionality
• Add object streams write capability (previously read-only)
• Add implementation documentation in OBJECT_STREAMS_IMPLEMENTATION.md

Fix

• Fix pdfutil build error - missing derive feature for clap dependency
• Fix async feature compilation - 25 examples/tests failing with --all-features
• Fix 31 clippy linting errors blocking CI with #![deny(clippy::all)]
• Fix object compression eligibility - structural objects (Catalog, Pages, Page) now properly compressed
• Fix trailer-referenced objects compression - only encryption dictionary excluded from compression
• Fix linearization detection for proper Catalog handling per PDF specification
• Fix compilation warnings

Update

• Update to Rust 2024 edition with minimum Rust 1.85 requirement

Maintain

• Maintain full backward compatibility - all existing APIs unchanged

v0.36.0

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Add

• Add support for Revision 5 (#​401)
• Add more checks to the encryption/decryption logic (#​399)
• Add sanity checks for PDF encryption, add examples for decrypting/encrypting PDF files and various bug fixes (#​397)
• Add encrypt function to crypt filters
• Add support for jiff and make both chrono and time optional features

Avoid

• Avoid parsing encrypted object streams early and correctly parse object streams upon decryption (#​385)
• Avoid decrypting cross-reference streams (#​381)

Check

• Check if the security handler is the standard one

Clarify

• Clarify datetime parsing logic using the PDF specification

Compute

• Compute the file encryption key (revision 6)

Declare

• Declare and implement crypt filters

Ensure

• Ensure the document is actually encrypted

Fix

• Fix unused imports
• Fix warning for rotate example
• Fix warnings about nom_parser
• Fix clippy warning about operator precedence
• Fix typo in comment

Gracefully

• Gracefully handle the is_aes check without throwing errors (#​376)

Handle

• Handle cases where the stream objects override the crypt filter

Implement

• Implement Document::encrypt() (#​396)
• Implement password authentication (revision 6)
• Implement decrypt with and without password sanitization
• Implement authentication functions
• Implement password sanitization from string
• Implement password algorithms 2-7
• Implement encrypt_object function
• Implement and use PKCS#​5 padding instead
• Implement function to parse the available crypt filters
• Implement 256-bit AES-CBC crypt filter
• Implement TryFrom rather than TryInto

Improve

• Improve the AES decryption with some sanity checks (#​383)

Merge

• Merge remaining algorithms functions into PasswordAlgorithm implementation

Missing

• Missing import to test

Only

• Only encode EncryptMetadata when V >= 4 (#​400)

Provide

• Provide revision-agnostic functions for the password algorithms

Randomly

• Randomly generate file encryption key for V5 in encrypt example (#​403)

Recurse

• Recurse into arrays and dictionaries to fully decrypt all strings/streams (#​378)

Release

• Release 0.36

Remove

• Remove the old implementation
• Remove workflow that used to enable the nom_parser feature
• Remove nom_parser feature

Reorganize

• Reorganize encryption code

Sanitize

• Sanitize passwords (revision 6)

Try

• Try decrypting with an empty password

Unpack

• Unpack objects after decrypting object streams (#​382)

Update

• Update to nom 8.0 and nom_locate 5.0 (#​402)

Update

• update changelog

Use

• Use a hasher instead of allocating a Vec
• Use the new implementation to compute the file encryption key
• Use the default stream and string crypt filter if present
• Use Unix epoch if time feature is not enabled
• Use get_deref for the Kids array to handle indirect references (#​379)

Validate

• Validate encryption dictionary for revision 5 (#​405)

Validate

• validate binary comment during parsing (#​392)

v0.35.0

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Add

• Add test for supported color types in PDF image embedding
• Add function for text chunks extraction. (#​342)

Added

• added binary comment as attribute and for load and write. Binary Comment is gonna be important for pdf in A/2, A/3 format. (#​370)

Allow

• Allow parsing off-spec PDF files with prefixes before the header (#​362)

Also

• Also accept ASCII85 streams without EOD marker (#​354)

Fix

• Fix clippy warning
• Fix incorrect image data handling in PDF content stream
• Fix BitsPerComponent calculation and improper ColorSpace mapping
• Fix incorrect color type detection for JPEG images
• Fix mulitplication overflow in ascii85 decode (#​348)
• Fix out of memory bug (#​347)
• Fix addition overflow (#​346)
• Fix lowercase s of Procset and no space target string(J-F-Liu#​323) (#​324)

Ignore

• Ignore space after byte index of startxref (#​371)

Implement

• Implement ToUnicode for variadic len encodings (#​328)

Improve

• Improve JPEG processing efficiency by avoiding unnecessary decode (#​345)
• Improve cmap parsing and internal error handling (#​335)

Inline

• Inline images (#​356)

Keep

• keep existing values when extending dictionary (#​322)

Properly

• Properly support document prefixes (#​365)

Refactor

• Refactor and optimize image processing logic in xobject.rs

Release

• Release 0.35

Remove

• remove misleading Object::as_string (#​350)

Remove

• Remove superfluous ref keyword (#​361)
• Remove pom parser (#​355)
• Remove /Prev from trailer (#​333)

Replace

• Replace debug assert with Result (#​349)
• Replace unwrap with error handling (#​351)

Rework

• Rework errors (#​358)

Specify

• Specify minimum Rust version in Cargo.toml (#​320)

Support

• Support UTF-16 encoding for bookmark titles with non-ASCII characters (#​364)
• Support AES encryption and revision 4 (#​343)

Throw

• Throw error if xref stream cannot be uncompressed (#​339)

Update

• update changelog

v0.34.0

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Add

• Add ASCII85 decoding (#​317)
• Add text extraction based on ToUnicode cmap (#​314)
• Add error handling to object stream (#​299)
• Add PDFDocEncoding (#​296)

Cleanup

• Cleanup comments and cargo fmt (#​290)

Detect

• Detect reference cycles when going through trailers (#​308)
• Detect reference cycles when parsing streams (with nom_parser) (#​300)
• Detect reference cycles when collecting page resources (#​298)

Fix

• Fix unicode fonts extraction in extract text example. (#​315)
• Fix clippy warings

Implement

• Implement encoding and decoding of text strings (PDF1.7 section 7.9.2.2) (#​297)

Improve

• Improve error handling (#​307)

Refactor

• Refactor get_or_create_resources() (#​291)

Release

• Release 0.34

Replace

• Replace unwrap with returning error (#​310)
• Replace LinkedHashMap with IndexMap (#​293)

Update

• Update dependencies (#​309)
• Update readme of pdfutil (#​295)

v0.33.0

Accept

• Accept comments in content parsing (#​261)

Added

• Added a new feature to get images info from the pdf page. (#​275)

Async

• Async Examples (#​266)

AsyncReader

• AsyncReader (#​265)

Fix

• Fix parse outline failed, the key ’D‘ might be an object id (#​274)
• Fix parse outline failed(#​270) (#​271)

Indexmap

• indexmap use in TOC for sorted TOC (#​267)

Release

• Release 0.33

Replace

• Replace md5 with md-5 (#​272)

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