• New Version of RAR archiver

    From Janis Kracht@1:261/38 to All on Thu Aug 24 15:37:42 2023
    WinRAR - What's new in the latest version

    Version 6.23

    1. Added extraction of XZ archives utilizing ARM64 filter.

    2. Rar$LS* temporary files, created when extracting or testing multiple
    archives from Windows context menu, are now deleted immediately.
    Previously they were deleted only on next WinRAR runs and only
    if they were at least 1 hour old.

    3. Bugs fixed:

    a) a security issue involving out of bounds write is fixed
    in RAR4 recovery volumes processing code.

    We are thankful to goodbyeselene working with Trend Micro Zero Day
    Initiative for letting us know about this bug;

    For full list of changes, see WhatsNew.txt in the archive.

    --- BBBS/Li6 v4.10 Toy-6
    * Origin: Prism bbs (1:261/38)
  • From Janis Kracht@1:261/38 to All on Tue Apr 9 15:17:36 2024
    WinRAR - What's new in the latest version

    Version 7.00

    1. Compression dictionary sizes larger than 1 GB are supported
    for RAR archive format. Depending on the amount of physically
    available memory, dictionary up to 64 GB can be selected.

    Not power of 2 dictionary sizes can be specified for dictionaries
    exceeding 4 GB. So we are not limited to 4, 8, 16, 32, 64 series
    and can use values like 5 GB or 22 GB.

    Archives with dictionaries exceeding 4 GB can be unpacked only
    by WinRAR 7.0 or newer. 64-bit WinRAR version is needed to unpack
    archives with dictionaries exceeding 1 GB.

    Increasing the dictionary size can improve the compression ratio
    for large files with distant repeated blocks, like virtual machine
    disk images. It also can be efficient for sets of large similar files
    in a solid archive, such as a collection of software ISO images
    differing by version or localization.

    2. WinRAR issues a prompt allowing to cancel or continue if dictionary
    size in extracted RAR archive exceeds "Maximum dictionary size
    allowed to extract" parameter in "Settings/Compression".
    It is done to prevent the unexpected excessive memory allocation.

    In the command line mode by default WinRAR refuses to unpack archives
    with dictionary exceeding 4 GB. Use -md<size> or -mdx<size> to allow
    unpacking dictionaries up to and including the specified size.
    Unlike -md<size>, -mdx<size> is applied to extraction only and can be
    added to RAR environment variable, not affecting archiving commands.

    3. "Define dictionary sizes" dialog in "Settings/Compression" can be used
    to customize dictionary sizes proposed in the drop down list associated
    with "Dictionary size" field in "Archive name and parameters" dialog.

    4. Alternate search algorithm, optimized to locate longer and more distant
    repeated data blocks, can be used when creating RAR archives.
    It helps to improve the compression ratio and sometimes speed
    for redundant data like big text files.

    It increases memory usage and might reduce the compression speed
    for some types of data. It can be turned on or off with
    "Long range search" options in "Advanced compression parameters" dialog
    or with -mcl[+|-] switch. If "Auto" option is selected, WinRAR applies
    the long range search depending on the compression method, dictionary
    size and other parameters.

    This algorithm is required for dictionaries exceeding 4 GB
    and turning it off is ignored for such dictionaries.

    5. Much slower and more exhaustive repeated data search and compression
    algorithm can be enabled with "Exhaustive search" option in "Advanced
    compression parameters" dialog or with -mcx switch.
    It might provide the additional compression gain for some types of
    redundant data, but at much lower compression speed.

    Long range search is needed to implement this mode efficiently,
    so the exhaustive search option activates it automatically.

    Both long range and exhaustive search option do not affect
    the compatibility of created archives. So if dictionary size
    is in 128 KB - 4 GB range, archives created with these search options
    can be unpacked by all WinRAR versions beginning from 5.0.

    6. Maximum path length limit is increased from 2047 to 65535 characters.

    7. Creating archives in RAR 4.x format isn't supported anymore.
    Options and switches specific for this format are removed.
    It doesn't affect RAR 4.x archives decompression, which is included
    into WinRAR.

    8. "Propagate Mark of the Web" option in "Settings/Security" dialog
    controls assigning the archive Mark of the Web to extracted files.
    It is possible to prohibit propagating, allow it for several
    predefined file groups, for all files or for files matching user
    defined file masks.

    Mark of the Web is the security zone information added by Internet
    browsers to downloaded files. It can be used by various software
    for security purposes.

    It is supported only by GUI WinRAR. Console RAR doesn't propagate
    Mark of the Web regardless of this option.

    9. "Attributes" column can be enabled in "Settings/File list/Columns".
    It displays file attribute abbreviations, such as 'A' for "Archive"
    and 'D' for directory.
    9. "Attributes" column can be enabled in "Settings/File list/Columns".
    It displays file attribute abbreviations, such as 'A' for "Archive"
    and 'D' for directory.

    If file attribute isn't among those recognized by WinRAR,
    the numeric value of file attributes is also displayed.
    This value uses hexadecimal format for Windows attributes
    or octal format for Unix attributes.

    10. "Benchmark" command allows to specify the exact number of threads
    and copy results to clipboard. Information about WinRAR and Windows
    versions, CPU and memory is added to benchmark window.

    11. "Remove redundant folders from extraction path" option
    in "Settings/Paths" is now applicable also to extraction commands
    invoked from WinRAR user interface and to multiple archives
    unpacked to separate folders. It removes a destination path
    component, only if its name matches both the archive name and root
    archived folder name, provided that there are no other folders
    or files in archive root.

    For example, it will remove one of "Pictures" in the destination path
    if we unpack Pictures.rar containing the root "Pictures" folder
    to "Pictures\" destination.

    Previously it worked only for a single archive extracted from
    context menu and didn't check if archived folder name matches
    the last destination path component.

    12. "Word wrap in comment" option in "Interface" options group
    in "Settings/General" toggles the word wrap mode in archive comment

    13. Dictionary size data in archive information dialog is now available
    for .bz2, .lz, .tar.bz2, .tar.gz, .tar.lz, .tar.zst archives.

    14. Switch -ol- prohibits archiving and extracting symbolic links.

    15. Switches -sl<size>[u] and -sm<size>[u] recognize [k|K|m|M|g|G|t|T]
    size units for kilobytes, thousands of bytes, megabytes, millions
    of bytes, gigabytes, billions of bytes, terabytes, trillions of bytes.
    If unit character is 'b', 'B' or not present, bytes are assumed.

    Previously these switches accepted bytes only.

    16. SFX TempMode command accepts the optional @set:user parameter
    allowing to modify temporary folder permissions, so only the current
    user can access it. It prohibits a local user to replace files
    16. SFX TempMode command accepts the optional @set:user parameter
    allowing to modify temporary folder permissions, so only the current
    user can access it. It prohibits a local user to replace files
    in a temporary folder if SFX is started under another account.

    It also can be enabled with "Restrict folder access" option
    in "Advanced SFX options/Modes" dialog.

    Some installers might fail to start in a folder created with
    @set:user parameter.

    17. File permissions and NTFS alternate streams are not saved for
    hard link entries. They are saved only for the source file these
    entries refer to. It allows to reduce the archive size, because
    such file properties are automatically propagated to hard links
    copies when extracting.

    18. Keyboard shortcuts, such as Ctrl+A to select all files or Alt+E to
    unpack found archives, are now functional in "Search results" window
    also while search is still in progress. Previously they were available
    only after completing search.

    19. Switch -v<size>[unit] recognizes 't' and 'T' as terabytes and
    trillions of bytes for volume size units.

    20. Warning is issued if leading '-' character is missing in a parameter
    specified in "Additional switches" field of WinRAR archiving
    and extraction dialogs. Also it is issued for parameters lacking '-'
    in RAR environment variable and rar.ini file.

    Previously such malformed parameters were ignored silently.

    21. "Convert archives" command displays the smooth total operation progress.
    Previously the total progress was updated abruptly after converting
    an archive and was visible only when processing multiple archives.

    22. Proper progress is displayed when compressing symbolic link targets.

    23. "Integrate WinRAR into shell" option in WinRAR "Settings/Integration"
    is grayed out if "Global\Integration=0" is present in winrar.ini file.

    24. 64-bit WinRAR version uses 64-bit SFX modules by default.
    64-bit SFX modules are needed to unpack archives with dictionaries
    exceeding 1 GB.

    32-bit modules are renamed to Default32.SFX, Zip32.SFX, WinCon32.SFX.

    25. Maximum allowed dictionary size for archiving and extraction
    can be specified in gigabytes in MaxDictA and MaxDictE variables
    in "HKEY_CURRENT_USER\Software\WinRAR\Policy" Registry key.
    If these variables are smaller than corresponding values defined
    in WinRAR interface, they override interface values.

    26. Console RAR filters out character 27 from screen output. It is done
    for security reasons, because this character can be used to declare
    ANSI escape control sequences in some terminal applications.

    We are thankful to Siddharth Dushantha for bringing this issue
    to our attention.

    27. Bugs fixed:

    a) it was possible to overwrite Mark of the Web, propagated from
    archive to extracted files, and modify its security zone information
    utilizing a specially crafted .rar archive.

    We are thankful to Orange Tsai and NiNi from DEVCORE Research Team
    working with Trend Micro Zero Day Initiative for letting us know
    about this security issue.

    Unlike WinRAR, unrar.dll library doesn't propagate the archive
    Mark of the Web and leaves it to a caller application to assign it
    to extracted files. So unrar.dll isn't affected by this issue;

    b) "User defined archive extensions" field in "Settings/Integration"
    was not saved if winrar.ini was used to store settings
    and WinRAR was started under non-administrator user account.

    As usual, please see the complete list of changes in the file "What's new in the latest version" in the archive.

    --- BBBS/Li6 v4.10 Toy-6
    * Origin: <<Prism bbs (1:261/38)