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kme : checksum   19

Hashing it Out in PowerShell: Using Get-FileHash |
Windows 7, even with all the updates, only has PowerShell 2.0, so no 'get-filehash' for Windows 7.
PowerShell 4.0 introduced a new cmdlet, Get-FileHash, primarily for use with Desired State Configuration (DSC). In a pull server configuration, you need to provide file hashes so that servers can recognize changes. That is the primary purpose of a file hash as far as I am concerned is for file integrity. Windows supports several different hashing algorithms, which you should not confuse with encryption.
powershell  hash  checksum  crypto  windows  win7  shellscripting 
6 weeks ago by kme
md5sum on Mac OS X | check MD5 hashes
tl;dr: use 'md5', but it doesn't have a '-c' option.
macos  checksum  hashes  md5  sysadmin  security  sortof  solution 
11 weeks ago by kme
Check and verify md5/sha1/sha256 checksums for MacOS X when I download files - nixCraft |
The solution is to check `uname -s` == "Darwin" and use `shasum -a 1` instead of `sha1sum`, which only exists on Linux
mac  osx  macos  security  checksum  hash  sha1  workaround  solution 
january 2019 by kme
Calculating checksums with CertUtil – Jan Christiansen's technical blog |
Among the supported hash algorithms are MD5, SHA1 and SHA256.

Be aware that the hash algorithm has to be in uppercase or the command can fail with:
CertUtil: -hashfile command FAILED: 0xd00000bb (-805306181)
CertUtil: WsResetMetadata
windows  sighmicrosoft  hash  checksum  errormessage  solution 
october 2018 by kme
hashing - Is there a built-in checksum utility on Windows 7? - Super User
CertUtil is a pre-installed Windows utility that can be used to generate hash checksums:

<code>certUtil -hashfile pathToFileToCheck [HashAlgorithm]
HashAlgorithm choices: MD2 MD4 MD5 SHA1 SHA256 SHA384 SHA512</code>

So for example, the following generates an MD5 checksum for the file C:\TEMP\MyDataFile.img:

<code>CertUtil -hashfile C:\TEMP\MyDataFile.img MD5</code>

To get output similar to *Nix systems you can add some PowerShell magic:

<code style="language-powershell">$(CertUtil -hashfile C:\TEMP\MyDataFile.img MD5)[1] -replace " ",""</code>
windows  hashing  checksum  hash  md5  sha1  commandline  utility  software  solution 
april 2018 by kme
Bash: parallelize md5sum checksum on many files - Stack Overflow []
Use GNU parallel. And you can find some more examples on how to implement it here.

find /mnt/data -type f | parallel -j 64 md5sum > md5.txt
md5sum  checksum  gnuparallel  clustercomputing  parallel  maybesolution 
august 2016 by kme
IcoFX - Support
For the file icofxsetup.exe:
CRC32: AE97BB11
MD5: 0C4858CA1193D73FB10C2656BECBB42F
SHA-1: C8982CBDF59653F72E92B7BDFD867BDCBA7F68A5

For the file (IcoFX Portable Edition):
CRC32: D0C23D10
MD5: 069E5551B7DEEE6F37833E8930E66A34
SHA-1: 44432CDF0D3368B5AD061AE3CC9EA73BE16F5BD1
icofx  checksum  md5  windows  utility  graphics  software 
may 2014 by kme

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