13

Is there any Built-In Checksum utility for Windows 10 using CRC-32? I checked different answers which are old and mention certUtil, but that does not support CRC-32 or CRC-64.

Update: I had also checked Is there a built-in checksum utility on Windows 7?, however, that's an old question and does not specifically asks for CRC-32 and Windows 10 may have support for it now. That's why asking this.

Umair Malhi
  • 231

7 Answers7

16

There is a way to get the CRC-32 on Windows (since Win 7):

  1. Right-click the file(s) you wish to get the CRC-32 for and click Send to → Compressed (zipped) folder.
  2. Open the ZIP file using Windows Explorer, set the view to details.
  3. Right-click on the detail header and select the CRC-32 column to be visible.
  4. Resize columns so the CRC-32 is visible.
  5. There you go!

Explorer providing CRC-32

Taylor Hillegeist
  • 161
7

7-Zip provides an additional Windows Explorer context menu entry from which checksums can be calculated:

  1. Right-click the file you wish to get the CRC-32 for. A context menu appears.
  2. Select the CRC SHA submenu entry.
  3. Select any of the available algorithms: CRC-32, CRC-64, SHA-1 or SHA-256 to calculate the respective checksum, or select "*" to calculate all of them and additionally BLAKE2sp.
Trudy
  • 179
  • 1
  • 4
3

I opened the .zip with Windows Explorer, the right-clicked the file to show properties in order to see the CRC32 value:

properties

Peregrino69
  • 5,004
user1553567
  • 31
3

For Windows 10, I can offer a powershell solution to read RtlComputeCrc32 API on Ntdll.dll.

param (
    [Parameter(Mandatory=$true)]
    [string]$InputFile
)

Add-Type -TypeDefinition @"
using System;
using System.Runtime.InteropServices;


public class Win32Api {
    [DllImport("ntdll.dll")]
    public static extern uint RtlComputeCrc32(uint dwInitial, byte[] pData, int iLen);
}
"@


Read the file as bytes


$fileBytes = [System.IO.File]::ReadAllBytes($InputFile)


Calculate the CRC32 checksum using the Win32 API


$crc32 = [Win32Api]::RtlComputeCrc32(0, $fileBytes, $fileBytes.Length)


Convert the CRC32 value to hexadecimal string


$crc32String = $crc32.ToString("X8")


Display the CRC32 checksum


Write-Output "CRC32: 0x$crc32String"
#Just to keep Powershell window open. Remove this line for non-interactive usage.
pause

Save this script as a file like crc32.ps1 You can run on windows console as

Powershell -ExecutionPolicy Bypass -File crc32.ps1 -InputFile SomeFile.bin
Cem Polat
  • 131
2

Wrapped the code from Cem Polat into a function. It's working fine and fast! Thanks Cem!

Add-Type -TypeDefinition @"
using System;
using System.Runtime.InteropServices;

public class Win32Api {
    [DllImport("ntdll.dll")]
    public static extern uint RtlComputeCrc32(uint dwInitial, byte[] pData, int iLen);
}
"@


function Get-CRC32 {
    [CmdletBinding()]
    param (
        [Parameter(Mandatory=$true,ValueFromPipeline = $true)]
        [string]$InputFile
    )
    Write-host $InputFile
    # Read the file as bytes
    $fileBytes = [System.IO.File]::ReadAllBytes($InputFile)


# Calculate the CRC32 checksum using the Win32 API
$crc32 = [Win32Api]::RtlComputeCrc32(0, $fileBytes, $fileBytes.Length)

# Convert the CRC32 value to hexadecimal string
$crc32String = $crc32.ToString("X8")

# Display the CRC32 checksum
Write-Output $crc32String



}
LawF0rge52
  • 21
0

OpenHashTab is nice tools recomended as do the job https://github.com/namazso/OpenHashTab/releases/tag/v3.0.4 enter image description here

user956584
  • 396
-1

On my side it works, but you MUST be in the ziped folder via the windows explorer. Then, once inside, you can see the CRC-32 column option.

Benoit
  • 1