"A local file header is corrupt" error occurs while unpacking the ZIP archive #49580

Closed
#68106
Closed
"A local file header is corrupt" error occurs while unpacking the ZIP archive#49580
#68106
Labels
area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
Milestone
Future

Description

@Albeoris
Albeoris
opened on Mar 13, 2021

Description

In the process of working with a large number of .zip archives from various sources, I ran into a problem when unpacking some of them.

Configuration

  • Framework: .NET 5.0
  • OS: Windows 10
  • Architecture: x64

Regression?

No, there is a similar problem in .NET 4.7.2

Other information

ZipArchiveEntry.cs :: IsOpenable

// _compressedSize is (long) 4294967295 => ffffffffif(OffsetOfCompressedData+_compressedSize>_archive.ArchiveStream.Length){message=SR.LocalFileHeaderCorrupt;returnfalse;}

ZipBlocks.cs :: TryReadBlock

booluncompressedSizeInZip64=uncompressedSizeSmall==ZipHelper.Mask32Bit;// trueboolcompressedSizeInZip64=compressedSizeSmall==ZipHelper.Mask32Bit;// trueboolrelativeOffsetInZip64=relativeOffsetOfLocalHeaderSmall==ZipHelper.Mask32Bit;// falsebooldiskNumberStartInZip64=diskNumberStartSmall==ZipHelper.Mask16Bit;// false

ZipBlocks.cs :: TryGetZip64BlockFromGenericExtraField

zip64Block._size=extraField.Size;ushortexpectedSize=0;if(readUncompressedSize)expectedSize+=8;// trueif(readCompressedSize)expectedSize+=8;// trueif(readLocalHeaderOffset)expectedSize+=8;// falseif(readStartDiskNumber)expectedSize+=4;// false// expectedSize is 16// zip64Block._size is 28if(expectedSize!=zip64Block._size)returnfalse;// unreachable code if(readUncompressedSize)zip64Block._uncompressedSize=reader.ReadInt64();if(readCompressedSize)zip64Block._compressedSize=reader.ReadInt64();

Here is the ZipInfo result for the given archive.
The archive is alive and correctly opened by all current archivers.

There is no zipfile comment.
End-of-central-directory record:
-------------------------------
Zip archive file size: 7414 (0000000000001CF6h)
Actual end-cent-dir record offset: 7316 (0000000000001C94h)
Expected end-cent-dir record offset: 7316 (0000000000001C94h)
(based on the length of the central directory and its expected offset)
This zipfile constitutes the sole disk of a single-part archive; its
central directory contains 1 entry.
The central directory is 151 (0000000000000097h) bytes long,
and its (expected) offset in bytes from the beginning of the zipfile
is 7165 (0000000000001BFDh).
Central directory entry #1:
---------------------------
file.txt
offset of local header from start of archive: 0
(0000000000000000h) bytes
file system or operating system of origin: MS-DOS, OS/2 or NT FAT
version of encoding software: 4.5
minimum file system compatibility required: MS-DOS, OS/2 or NT FAT
minimum software version required to extract: 4.5
compression method: deflated
compression sub-type (deflation): normal
file security status: not encrypted
extended local header: no
file last modified on (DOS date/time): 2021 Mar 13 18:11:52
32-bit CRC value (hex): 1b0e1343
compressed size: 7042 bytes
uncompressed size: 93523 bytes
length of filename: 37 characters
length of extra field: 68 bytes
length of file comment: 0 characters
disk number on which file begins: disk 1
apparent file type: binary
non-MSDOS external file attributes: 000000 hex
MS-DOS file attributes (00 hex): none
The central-directory extra field contains:
- A subfield with ID 0x0001 (PKWARE 64-bit sizes) and 28 data bytes. The first
20 are: 53 6d 01 00 00 00 00 00 82 1b 00 00 00 00 00 00 00 00 00 00.
- A subfield with ID 0x000a (PKWARE Win32) and 32 data bytes. The first
20 are: 00 00 00 00 01 00 18 00 4b 75 22 0f 76 04 d7 01 4b 75 22 0f.
There is no file comment.

A similar problem was mentioned earlier, but it was related to large files:
#1094

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    area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration

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      , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
       blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

      Skip to content
      "A local file header is corrupt" error occurs while unpacking the ZIP archive #49580
      Closed
      #68106
      Closed
      "A local file header is corrupt" error occurs while unpacking the ZIP archive#49580
      #68106
      Labels
      area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
      Milestone
      Future
      Description
      @Albeoris
      Albeoris
      opened on Mar 13, 2021
      Description
      In the process of working with a large number of .zip archives from various sources, I ran into a problem when unpacking some of them.
      Configuration
      • Framework: .NET 5.0
      • OS: Windows 10
      • Architecture: x64
      Regression?
      No, there is a similar problem in .NET 4.7.2
      Other information
      ZipArchiveEntry.cs :: IsOpenable
      // _compressedSize is (long) 4294967295 => ffffffffif(OffsetOfCompressedData+_compressedSize>_archive.ArchiveStream.Length){message=SR.LocalFileHeaderCorrupt;returnfalse;}
      ZipBlocks.cs :: TryReadBlock
      booluncompressedSizeInZip64=uncompressedSizeSmall==ZipHelper.Mask32Bit;// trueboolcompressedSizeInZip64=compressedSizeSmall==ZipHelper.Mask32Bit;// trueboolrelativeOffsetInZip64=relativeOffsetOfLocalHeaderSmall==ZipHelper.Mask32Bit;// falsebooldiskNumberStartInZip64=diskNumberStartSmall==ZipHelper.Mask16Bit;// false
      ZipBlocks.cs :: TryGetZip64BlockFromGenericExtraField
      zip64Block._size=extraField.Size;ushortexpectedSize=0;if(readUncompressedSize)expectedSize+=8;// trueif(readCompressedSize)expectedSize+=8;// trueif(readLocalHeaderOffset)expectedSize+=8;// falseif(readStartDiskNumber)expectedSize+=4;// false// expectedSize is 16// zip64Block._size is 28if(expectedSize!=zip64Block._size)returnfalse;// unreachable code if(readUncompressedSize)zip64Block._uncompressedSize=reader.ReadInt64();if(readCompressedSize)zip64Block._compressedSize=reader.ReadInt64();
      Here is the ZipInfo result for the given archive.
      
The archive is alive and correctly opened by all current archivers.
      There is no zipfile comment.
End-of-central-directory record:
-------------------------------
Zip archive file size: 7414 (0000000000001CF6h)
Actual end-cent-dir record offset: 7316 (0000000000001C94h)
Expected end-cent-dir record offset: 7316 (0000000000001C94h)
(based on the length of the central directory and its expected offset)
This zipfile constitutes the sole disk of a single-part archive; its
central directory contains 1 entry.
The central directory is 151 (0000000000000097h) bytes long,
and its (expected) offset in bytes from the beginning of the zipfile
is 7165 (0000000000001BFDh).
Central directory entry #1:
---------------------------
file.txt
offset of local header from start of archive: 0
(0000000000000000h) bytes
file system or operating system of origin: MS-DOS, OS/2 or NT FAT
version of encoding software: 4.5
minimum file system compatibility required: MS-DOS, OS/2 or NT FAT
minimum software version required to extract: 4.5
compression method: deflated
compression sub-type (deflation): normal
file security status: not encrypted
extended local header: no
file last modified on (DOS date/time): 2021 Mar 13 18:11:52
32-bit CRC value (hex): 1b0e1343
compressed size: 7042 bytes
uncompressed size: 93523 bytes
length of filename: 37 characters
length of extra field: 68 bytes
length of file comment: 0 characters
disk number on which file begins: disk 1
apparent file type: binary
non-MSDOS external file attributes: 000000 hex
MS-DOS file attributes (00 hex): none
The central-directory extra field contains:
- A subfield with ID 0x0001 (PKWARE 64-bit sizes) and 28 data bytes. The first
20 are: 53 6d 01 00 00 00 00 00 82 1b 00 00 00 00 00 00 00 00 00 00.
- A subfield with ID 0x000a (PKWARE Win32) and 32 data bytes. The first
20 are: 00 00 00 00 01 00 18 00 4b 75 22 0f 76 04 d7 01 4b 75 22 0f.
There is no file comment.

      A similar problem was mentioned earlier, but it was related to large files:
      #1094
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
        Type
        No type
        Projects
        No projects
          Milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

          Skip to content
          "A local file header is corrupt" error occurs while unpacking the ZIP archive #49580
          Closed
          #68106
          Closed
          "A local file header is corrupt" error occurs while unpacking the ZIP archive#49580
          #68106
          Labels
          area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
          Milestone
          Future
          Description
          @Albeoris
          Albeoris
          opened on Mar 13, 2021
          Description
          In the process of working with a large number of .zip archives from various sources, I ran into a problem when unpacking some of them.
          Configuration
          • Framework: .NET 5.0
          • OS: Windows 10
          • Architecture: x64
          Regression?
          No, there is a similar problem in .NET 4.7.2
          Other information
          ZipArchiveEntry.cs :: IsOpenable
          // _compressedSize is (long) 4294967295 => ffffffffif(OffsetOfCompressedData+_compressedSize>_archive.ArchiveStream.Length){message=SR.LocalFileHeaderCorrupt;returnfalse;}
          ZipBlocks.cs :: TryReadBlock
          booluncompressedSizeInZip64=uncompressedSizeSmall==ZipHelper.Mask32Bit;// trueboolcompressedSizeInZip64=compressedSizeSmall==ZipHelper.Mask32Bit;// trueboolrelativeOffsetInZip64=relativeOffsetOfLocalHeaderSmall==ZipHelper.Mask32Bit;// falsebooldiskNumberStartInZip64=diskNumberStartSmall==ZipHelper.Mask16Bit;// false
          ZipBlocks.cs :: TryGetZip64BlockFromGenericExtraField
          zip64Block._size=extraField.Size;ushortexpectedSize=0;if(readUncompressedSize)expectedSize+=8;// trueif(readCompressedSize)expectedSize+=8;// trueif(readLocalHeaderOffset)expectedSize+=8;// falseif(readStartDiskNumber)expectedSize+=4;// false// expectedSize is 16// zip64Block._size is 28if(expectedSize!=zip64Block._size)returnfalse;// unreachable code if(readUncompressedSize)zip64Block._uncompressedSize=reader.ReadInt64();if(readCompressedSize)zip64Block._compressedSize=reader.ReadInt64();
          Here is the ZipInfo result for the given archive.
          
The archive is alive and correctly opened by all current archivers.
          There is no zipfile comment.
End-of-central-directory record:
-------------------------------
Zip archive file size: 7414 (0000000000001CF6h)
Actual end-cent-dir record offset: 7316 (0000000000001C94h)
Expected end-cent-dir record offset: 7316 (0000000000001C94h)
(based on the length of the central directory and its expected offset)
This zipfile constitutes the sole disk of a single-part archive; its
central directory contains 1 entry.
The central directory is 151 (0000000000000097h) bytes long,
and its (expected) offset in bytes from the beginning of the zipfile
is 7165 (0000000000001BFDh).
Central directory entry #1:
---------------------------
file.txt
offset of local header from start of archive: 0
(0000000000000000h) bytes
file system or operating system of origin: MS-DOS, OS/2 or NT FAT
version of encoding software: 4.5
minimum file system compatibility required: MS-DOS, OS/2 or NT FAT
minimum software version required to extract: 4.5
compression method: deflated
compression sub-type (deflation): normal
file security status: not encrypted
extended local header: no
file last modified on (DOS date/time): 2021 Mar 13 18:11:52
32-bit CRC value (hex): 1b0e1343
compressed size: 7042 bytes
uncompressed size: 93523 bytes
length of filename: 37 characters
length of extra field: 68 bytes
length of file comment: 0 characters
disk number on which file begins: disk 1
apparent file type: binary
non-MSDOS external file attributes: 000000 hex
MS-DOS file attributes (00 hex): none
The central-directory extra field contains:
- A subfield with ID 0x0001 (PKWARE 64-bit sizes) and 28 data bytes. The first
20 are: 53 6d 01 00 00 00 00 00 82 1b 00 00 00 00 00 00 00 00 00 00.
- A subfield with ID 0x000a (PKWARE Win32) and 32 data bytes. The first
20 are: 00 00 00 00 01 00 18 00 4b 75 22 0f 76 04 d7 01 4b 75 22 0f.
There is no file comment.

          A similar problem was mentioned earlier, but it was related to large files:
          #1094
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
            Type
            No type
            Projects
            No projects
              Milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              "A local file header is corrupt" error occurs while unpacking the ZIP archive #49580
              Closed
              #68106
              Closed
              "A local file header is corrupt" error occurs while unpacking the ZIP archive#49580
              #68106
              Labels
              area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
              Milestone
              Future
              Description
              @Albeoris
              Albeoris
              opened on Mar 13, 2021
              Description
              In the process of working with a large number of .zip archives from various sources, I ran into a problem when unpacking some of them.
              Configuration
              • Framework: .NET 5.0
              • OS: Windows 10
              • Architecture: x64
              Regression?
              No, there is a similar problem in .NET 4.7.2
              Other information
              ZipArchiveEntry.cs :: IsOpenable
              // _compressedSize is (long) 4294967295 => ffffffffif(OffsetOfCompressedData+_compressedSize>_archive.ArchiveStream.Length){message=SR.LocalFileHeaderCorrupt;returnfalse;}
              ZipBlocks.cs :: TryReadBlock
              booluncompressedSizeInZip64=uncompressedSizeSmall==ZipHelper.Mask32Bit;// trueboolcompressedSizeInZip64=compressedSizeSmall==ZipHelper.Mask32Bit;// trueboolrelativeOffsetInZip64=relativeOffsetOfLocalHeaderSmall==ZipHelper.Mask32Bit;// falsebooldiskNumberStartInZip64=diskNumberStartSmall==ZipHelper.Mask16Bit;// false
              ZipBlocks.cs :: TryGetZip64BlockFromGenericExtraField
              zip64Block._size=extraField.Size;ushortexpectedSize=0;if(readUncompressedSize)expectedSize+=8;// trueif(readCompressedSize)expectedSize+=8;// trueif(readLocalHeaderOffset)expectedSize+=8;// falseif(readStartDiskNumber)expectedSize+=4;// false// expectedSize is 16// zip64Block._size is 28if(expectedSize!=zip64Block._size)returnfalse;// unreachable code if(readUncompressedSize)zip64Block._uncompressedSize=reader.ReadInt64();if(readCompressedSize)zip64Block._compressedSize=reader.ReadInt64();
              Here is the ZipInfo result for the given archive.
              
The archive is alive and correctly opened by all current archivers.
              There is no zipfile comment.
End-of-central-directory record:
-------------------------------
Zip archive file size: 7414 (0000000000001CF6h)
Actual end-cent-dir record offset: 7316 (0000000000001C94h)
Expected end-cent-dir record offset: 7316 (0000000000001C94h)
(based on the length of the central directory and its expected offset)
This zipfile constitutes the sole disk of a single-part archive; its
central directory contains 1 entry.
The central directory is 151 (0000000000000097h) bytes long,
and its (expected) offset in bytes from the beginning of the zipfile
is 7165 (0000000000001BFDh).
Central directory entry #1:
---------------------------
file.txt
offset of local header from start of archive: 0
(0000000000000000h) bytes
file system or operating system of origin: MS-DOS, OS/2 or NT FAT
version of encoding software: 4.5
minimum file system compatibility required: MS-DOS, OS/2 or NT FAT
minimum software version required to extract: 4.5
compression method: deflated
compression sub-type (deflation): normal
file security status: not encrypted
extended local header: no
file last modified on (DOS date/time): 2021 Mar 13 18:11:52
32-bit CRC value (hex): 1b0e1343
compressed size: 7042 bytes
uncompressed size: 93523 bytes
length of filename: 37 characters
length of extra field: 68 bytes
length of file comment: 0 characters
disk number on which file begins: disk 1
apparent file type: binary
non-MSDOS external file attributes: 000000 hex
MS-DOS file attributes (00 hex): none
The central-directory extra field contains:
- A subfield with ID 0x0001 (PKWARE 64-bit sizes) and 28 data bytes. The first
20 are: 53 6d 01 00 00 00 00 00 82 1b 00 00 00 00 00 00 00 00 00 00.
- A subfield with ID 0x000a (PKWARE Win32) and 32 data bytes. The first
20 are: 00 00 00 00 01 00 18 00 4b 75 22 0f 76 04 d7 01 4b 75 22 0f.
There is no file comment.

              A similar problem was mentioned earlier, but it was related to large files:
              #1094
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                Type
                No type
                Projects
                No projects
                  Milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions
                  
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

                  Skip to content
                  "A local file header is corrupt" error occurs while unpacking the ZIP archive #49580
                  Closed
                  #68106
                  Closed
                  "A local file header is corrupt" error occurs while unpacking the ZIP archive#49580
                  #68106
                  Labels
                  area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                  Milestone
                  Future
                  Description
                  @Albeoris
                  Albeoris
                  opened on Mar 13, 2021
                  Description
                  In the process of working with a large number of .zip archives from various sources, I ran into a problem when unpacking some of them.
                  Configuration
                  • Framework: .NET 5.0
                  • OS: Windows 10
                  • Architecture: x64
                  Regression?
                  No, there is a similar problem in .NET 4.7.2
                  Other information
                  ZipArchiveEntry.cs :: IsOpenable
                  // _compressedSize is (long) 4294967295 => ffffffffif(OffsetOfCompressedData+_compressedSize>_archive.ArchiveStream.Length){message=SR.LocalFileHeaderCorrupt;returnfalse;}
                  ZipBlocks.cs :: TryReadBlock
                  booluncompressedSizeInZip64=uncompressedSizeSmall==ZipHelper.Mask32Bit;// trueboolcompressedSizeInZip64=compressedSizeSmall==ZipHelper.Mask32Bit;// trueboolrelativeOffsetInZip64=relativeOffsetOfLocalHeaderSmall==ZipHelper.Mask32Bit;// falsebooldiskNumberStartInZip64=diskNumberStartSmall==ZipHelper.Mask16Bit;// false
                  ZipBlocks.cs :: TryGetZip64BlockFromGenericExtraField
                  zip64Block._size=extraField.Size;ushortexpectedSize=0;if(readUncompressedSize)expectedSize+=8;// trueif(readCompressedSize)expectedSize+=8;// trueif(readLocalHeaderOffset)expectedSize+=8;// falseif(readStartDiskNumber)expectedSize+=4;// false// expectedSize is 16// zip64Block._size is 28if(expectedSize!=zip64Block._size)returnfalse;// unreachable code if(readUncompressedSize)zip64Block._uncompressedSize=reader.ReadInt64();if(readCompressedSize)zip64Block._compressedSize=reader.ReadInt64();
                  Here is the ZipInfo result for the given archive.
                  
The archive is alive and correctly opened by all current archivers.
                  There is no zipfile comment.
End-of-central-directory record:
-------------------------------
Zip archive file size: 7414 (0000000000001CF6h)
Actual end-cent-dir record offset: 7316 (0000000000001C94h)
Expected end-cent-dir record offset: 7316 (0000000000001C94h)
(based on the length of the central directory and its expected offset)
This zipfile constitutes the sole disk of a single-part archive; its
central directory contains 1 entry.
The central directory is 151 (0000000000000097h) bytes long,
and its (expected) offset in bytes from the beginning of the zipfile
is 7165 (0000000000001BFDh).
Central directory entry #1:
---------------------------
file.txt
offset of local header from start of archive: 0
(0000000000000000h) bytes
file system or operating system of origin: MS-DOS, OS/2 or NT FAT
version of encoding software: 4.5
minimum file system compatibility required: MS-DOS, OS/2 or NT FAT
minimum software version required to extract: 4.5
compression method: deflated
compression sub-type (deflation): normal
file security status: not encrypted
extended local header: no
file last modified on (DOS date/time): 2021 Mar 13 18:11:52
32-bit CRC value (hex): 1b0e1343
compressed size: 7042 bytes
uncompressed size: 93523 bytes
length of filename: 37 characters
length of extra field: 68 bytes
length of file comment: 0 characters
disk number on which file begins: disk 1
apparent file type: binary
non-MSDOS external file attributes: 000000 hex
MS-DOS file attributes (00 hex): none
The central-directory extra field contains:
- A subfield with ID 0x0001 (PKWARE 64-bit sizes) and 28 data bytes. The first
20 are: 53 6d 01 00 00 00 00 00 82 1b 00 00 00 00 00 00 00 00 00 00.
- A subfield with ID 0x000a (PKWARE Win32) and 32 data bytes. The first
20 are: 00 00 00 00 01 00 18 00 4b 75 22 0f 76 04 d7 01 4b 75 22 0f.
There is no file comment.

                  A similar problem was mentioned earlier, but it was related to large files:
                  #1094
                  Metadata
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                  No one assigned
                    Labels
                    area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
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                    No projects
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                      None yet
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                      Skip to content
                      "A local file header is corrupt" error occurs while unpacking the ZIP archive #49580
                      Closed
                      #68106
                      Closed
                      "A local file header is corrupt" error occurs while unpacking the ZIP archive#49580
                      #68106
                      Labels
                      area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                      Milestone
                      Future
                      Description
                      @Albeoris
                      Albeoris
                      opened on Mar 13, 2021
                      Description
                      In the process of working with a large number of .zip archives from various sources, I ran into a problem when unpacking some of them.
                      Configuration
                      • Framework: .NET 5.0
                      • OS: Windows 10
                      • Architecture: x64
                      Regression?
                      No, there is a similar problem in .NET 4.7.2
                      Other information
                      ZipArchiveEntry.cs :: IsOpenable
                      // _compressedSize is (long) 4294967295 => ffffffffif(OffsetOfCompressedData+_compressedSize>_archive.ArchiveStream.Length){message=SR.LocalFileHeaderCorrupt;returnfalse;}
                      ZipBlocks.cs :: TryReadBlock
                      booluncompressedSizeInZip64=uncompressedSizeSmall==ZipHelper.Mask32Bit;// trueboolcompressedSizeInZip64=compressedSizeSmall==ZipHelper.Mask32Bit;// trueboolrelativeOffsetInZip64=relativeOffsetOfLocalHeaderSmall==ZipHelper.Mask32Bit;// falsebooldiskNumberStartInZip64=diskNumberStartSmall==ZipHelper.Mask16Bit;// false
                      ZipBlocks.cs :: TryGetZip64BlockFromGenericExtraField
                      zip64Block._size=extraField.Size;ushortexpectedSize=0;if(readUncompressedSize)expectedSize+=8;// trueif(readCompressedSize)expectedSize+=8;// trueif(readLocalHeaderOffset)expectedSize+=8;// falseif(readStartDiskNumber)expectedSize+=4;// false// expectedSize is 16// zip64Block._size is 28if(expectedSize!=zip64Block._size)returnfalse;// unreachable code if(readUncompressedSize)zip64Block._uncompressedSize=reader.ReadInt64();if(readCompressedSize)zip64Block._compressedSize=reader.ReadInt64();
                      Here is the ZipInfo result for the given archive.
                      
The archive is alive and correctly opened by all current archivers.
                      There is no zipfile comment.
End-of-central-directory record:
-------------------------------
Zip archive file size: 7414 (0000000000001CF6h)
Actual end-cent-dir record offset: 7316 (0000000000001C94h)
Expected end-cent-dir record offset: 7316 (0000000000001C94h)
(based on the length of the central directory and its expected offset)
This zipfile constitutes the sole disk of a single-part archive; its
central directory contains 1 entry.
The central directory is 151 (0000000000000097h) bytes long,
and its (expected) offset in bytes from the beginning of the zipfile
is 7165 (0000000000001BFDh).
Central directory entry #1:
---------------------------
file.txt
offset of local header from start of archive: 0
(0000000000000000h) bytes
file system or operating system of origin: MS-DOS, OS/2 or NT FAT
version of encoding software: 4.5
minimum file system compatibility required: MS-DOS, OS/2 or NT FAT
minimum software version required to extract: 4.5
compression method: deflated
compression sub-type (deflation): normal
file security status: not encrypted
extended local header: no
file last modified on (DOS date/time): 2021 Mar 13 18:11:52
32-bit CRC value (hex): 1b0e1343
compressed size: 7042 bytes
uncompressed size: 93523 bytes
length of filename: 37 characters
length of extra field: 68 bytes
length of file comment: 0 characters
disk number on which file begins: disk 1
apparent file type: binary
non-MSDOS external file attributes: 000000 hex
MS-DOS file attributes (00 hex): none
The central-directory extra field contains:
- A subfield with ID 0x0001 (PKWARE 64-bit sizes) and 28 data bytes. The first
20 are: 53 6d 01 00 00 00 00 00 82 1b 00 00 00 00 00 00 00 00 00 00.
- A subfield with ID 0x000a (PKWARE Win32) and 32 data bytes. The first
20 are: 00 00 00 00 01 00 18 00 4b 75 22 0f 76 04 d7 01 4b 75 22 0f.
There is no file comment.

                      A similar problem was mentioned earlier, but it was related to large files:
                      #1094
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                        Type
                        No type
                        Projects
                        No projects
                          Milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
                          Issue actions
                          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                          Skip to content
                          "A local file header is corrupt" error occurs while unpacking the ZIP archive #49580
                          Closed
                          #68106
                          Closed
                          "A local file header is corrupt" error occurs while unpacking the ZIP archive#49580
                          #68106
                          Labels
                          area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                          Milestone
                          Future
                          Description
                          @Albeoris
                          Albeoris
                          opened on Mar 13, 2021
                          Description
                          In the process of working with a large number of .zip archives from various sources, I ran into a problem when unpacking some of them.
                          Configuration
                          • Framework: .NET 5.0
                          • OS: Windows 10
                          • Architecture: x64
                          Regression?
                          No, there is a similar problem in .NET 4.7.2
                          Other information
                          ZipArchiveEntry.cs :: IsOpenable
                          // _compressedSize is (long) 4294967295 => ffffffffif(OffsetOfCompressedData+_compressedSize>_archive.ArchiveStream.Length){message=SR.LocalFileHeaderCorrupt;returnfalse;}
                          ZipBlocks.cs :: TryReadBlock
                          booluncompressedSizeInZip64=uncompressedSizeSmall==ZipHelper.Mask32Bit;// trueboolcompressedSizeInZip64=compressedSizeSmall==ZipHelper.Mask32Bit;// trueboolrelativeOffsetInZip64=relativeOffsetOfLocalHeaderSmall==ZipHelper.Mask32Bit;// falsebooldiskNumberStartInZip64=diskNumberStartSmall==ZipHelper.Mask16Bit;// false
                          ZipBlocks.cs :: TryGetZip64BlockFromGenericExtraField
                          zip64Block._size=extraField.Size;ushortexpectedSize=0;if(readUncompressedSize)expectedSize+=8;// trueif(readCompressedSize)expectedSize+=8;// trueif(readLocalHeaderOffset)expectedSize+=8;// falseif(readStartDiskNumber)expectedSize+=4;// false// expectedSize is 16// zip64Block._size is 28if(expectedSize!=zip64Block._size)returnfalse;// unreachable code if(readUncompressedSize)zip64Block._uncompressedSize=reader.ReadInt64();if(readCompressedSize)zip64Block._compressedSize=reader.ReadInt64();
                          Here is the ZipInfo result for the given archive.
                          
The archive is alive and correctly opened by all current archivers.
                          There is no zipfile comment.
End-of-central-directory record:
-------------------------------
Zip archive file size: 7414 (0000000000001CF6h)
Actual end-cent-dir record offset: 7316 (0000000000001C94h)
Expected end-cent-dir record offset: 7316 (0000000000001C94h)
(based on the length of the central directory and its expected offset)
This zipfile constitutes the sole disk of a single-part archive; its
central directory contains 1 entry.
The central directory is 151 (0000000000000097h) bytes long,
and its (expected) offset in bytes from the beginning of the zipfile
is 7165 (0000000000001BFDh).
Central directory entry #1:
---------------------------
file.txt
offset of local header from start of archive: 0
(0000000000000000h) bytes
file system or operating system of origin: MS-DOS, OS/2 or NT FAT
version of encoding software: 4.5
minimum file system compatibility required: MS-DOS, OS/2 or NT FAT
minimum software version required to extract: 4.5
compression method: deflated
compression sub-type (deflation): normal
file security status: not encrypted
extended local header: no
file last modified on (DOS date/time): 2021 Mar 13 18:11:52
32-bit CRC value (hex): 1b0e1343
compressed size: 7042 bytes
uncompressed size: 93523 bytes
length of filename: 37 characters
length of extra field: 68 bytes
length of file comment: 0 characters
disk number on which file begins: disk 1
apparent file type: binary
non-MSDOS external file attributes: 000000 hex
MS-DOS file attributes (00 hex): none
The central-directory extra field contains:
- A subfield with ID 0x0001 (PKWARE 64-bit sizes) and 28 data bytes. The first
20 are: 53 6d 01 00 00 00 00 00 82 1b 00 00 00 00 00 00 00 00 00 00.
- A subfield with ID 0x000a (PKWARE Win32) and 32 data bytes. The first
20 are: 00 00 00 00 01 00 18 00 4b 75 22 0f 76 04 d7 01 4b 75 22 0f.
There is no file comment.

                          A similar problem was mentioned earlier, but it was related to large files:
                          #1094
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                            Type
                            No type
                            Projects
                            No projects
                              Milestone
                              Relationships
                              None yet
                              Development
                              No branches or pull requests
                              Issue actions
                              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

                              Skip to content
                              "A local file header is corrupt" error occurs while unpacking the ZIP archive #49580
                              Closed
                              #68106
                              Closed
                              "A local file header is corrupt" error occurs while unpacking the ZIP archive#49580
                              #68106
                              Labels
                              area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                              Milestone
                              Future
                              Description
                              @Albeoris
                              Albeoris
                              opened on Mar 13, 2021
                              Description
                              In the process of working with a large number of .zip archives from various sources, I ran into a problem when unpacking some of them.
                              Configuration
                              • Framework: .NET 5.0
                              • OS: Windows 10
                              • Architecture: x64
                              Regression?
                              No, there is a similar problem in .NET 4.7.2
                              Other information
                              ZipArchiveEntry.cs :: IsOpenable
                              // _compressedSize is (long) 4294967295 => ffffffffif(OffsetOfCompressedData+_compressedSize>_archive.ArchiveStream.Length){message=SR.LocalFileHeaderCorrupt;returnfalse;}
                              ZipBlocks.cs :: TryReadBlock
                              booluncompressedSizeInZip64=uncompressedSizeSmall==ZipHelper.Mask32Bit;// trueboolcompressedSizeInZip64=compressedSizeSmall==ZipHelper.Mask32Bit;// trueboolrelativeOffsetInZip64=relativeOffsetOfLocalHeaderSmall==ZipHelper.Mask32Bit;// falsebooldiskNumberStartInZip64=diskNumberStartSmall==ZipHelper.Mask16Bit;// false
                              ZipBlocks.cs :: TryGetZip64BlockFromGenericExtraField
                              zip64Block._size=extraField.Size;ushortexpectedSize=0;if(readUncompressedSize)expectedSize+=8;// trueif(readCompressedSize)expectedSize+=8;// trueif(readLocalHeaderOffset)expectedSize+=8;// falseif(readStartDiskNumber)expectedSize+=4;// false// expectedSize is 16// zip64Block._size is 28if(expectedSize!=zip64Block._size)returnfalse;// unreachable code if(readUncompressedSize)zip64Block._uncompressedSize=reader.ReadInt64();if(readCompressedSize)zip64Block._compressedSize=reader.ReadInt64();
                              Here is the ZipInfo result for the given archive.
                              
The archive is alive and correctly opened by all current archivers.
                              There is no zipfile comment.
End-of-central-directory record:
-------------------------------
Zip archive file size: 7414 (0000000000001CF6h)
Actual end-cent-dir record offset: 7316 (0000000000001C94h)
Expected end-cent-dir record offset: 7316 (0000000000001C94h)
(based on the length of the central directory and its expected offset)
This zipfile constitutes the sole disk of a single-part archive; its
central directory contains 1 entry.
The central directory is 151 (0000000000000097h) bytes long,
and its (expected) offset in bytes from the beginning of the zipfile
is 7165 (0000000000001BFDh).
Central directory entry #1:
---------------------------
file.txt
offset of local header from start of archive: 0
(0000000000000000h) bytes
file system or operating system of origin: MS-DOS, OS/2 or NT FAT
version of encoding software: 4.5
minimum file system compatibility required: MS-DOS, OS/2 or NT FAT
minimum software version required to extract: 4.5
compression method: deflated
compression sub-type (deflation): normal
file security status: not encrypted
extended local header: no
file last modified on (DOS date/time): 2021 Mar 13 18:11:52
32-bit CRC value (hex): 1b0e1343
compressed size: 7042 bytes
uncompressed size: 93523 bytes
length of filename: 37 characters
length of extra field: 68 bytes
length of file comment: 0 characters
disk number on which file begins: disk 1
apparent file type: binary
non-MSDOS external file attributes: 000000 hex
MS-DOS file attributes (00 hex): none
The central-directory extra field contains:
- A subfield with ID 0x0001 (PKWARE 64-bit sizes) and 28 data bytes. The first
20 are: 53 6d 01 00 00 00 00 00 82 1b 00 00 00 00 00 00 00 00 00 00.
- A subfield with ID 0x000a (PKWARE Win32) and 32 data bytes. The first
20 are: 00 00 00 00 01 00 18 00 4b 75 22 0f 76 04 d7 01 4b 75 22 0f.
There is no file comment.

                              A similar problem was mentioned earlier, but it was related to large files:
                              #1094
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                area-System.IO.Compressionneeds-further-triageIssue has been initially triaged, but needs deeper consideration or reconsideration
                                Type
                                No type
                                Projects
                                No projects
                                  Milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions