Svendsen Tech's New-RandomData function generates cryptographically secure or pseudorandom data. Can be used to generate keys and passwords with the -StreamToSTDOUT parameter and has comprehensive features for generating files with random data, of a specified size.
Works on Linux, but on a 8192 bytes specified file size I got 8128 as actual size. Guessing "\r" missing once per line is the difference. Should fix (the $IsLinux variable or what-it-was, add one byte per line for Linux).
The module has been published to the PowerShell Gallery and can be downloaded, inspected and installed with Save-Module, Find-Module and Install-Module.
PowerShell Gallery link (Microsoft site): https://www.powershellgallery.com/packages/RandomData/
Comprehensive online blog documentation here: https://www.powershelladmin.com/wiki/Create_cryptographically_secure_and_pseudorandom_data_with_PowerShell
Some code examples.
PS /home/joakim/Documents> Import-Module ./RandomData/
PS /home/joakim/Documents> $RandomString = New-RandomData -LineLength 20 -Size 20 -StreamToSTDOUT
PS /home/joakim/Documents> $RandomString
4zffUVJbOl6GF8sbQOpu
PS /home/joakim/Documents> $HexKey = New-RandomData -LineLength 64 -Size 64 -StreamToSTDOUT -Random
RandomChar RandomCharExclude RandomFileNameGUID
PS /home/joakim/Documents> $HexKey = New-RandomData -LineLength 64 -Size 64 -StreamToSTDOUT `
-RandomChar @(@([char]'a'..[char]'f') + @([char]'0'..[char]'9'))
PS /home/joakim/Documents> $HexKey
24aac8116deb2d79b8796995ce2687f84d3bd092259473d24e42e274f7562e57
# Sizes are off by a smidge on Linux, probably due to \r being missing on this platform.
PS /home/joakim/Documents> mkdir randomdatatest
PS /home/joakim/Documents> cd randomdatatest
PS /home/joakim/Documents/randomdatatest> gci
PS /home/joakim/Documents/randomdatatest> Measure-Command {
New-RandomData -Count 100 -Size 8192 -LineLength 128 -Path (Get-Location) }
| % TotalSeconds
2.3546092
PS /home/joakim/Documents/randomdatatest> gci | select -first 10
Directory: /home/joakim/Documents/randomdatatest
UnixMode User Group LastWriteTime Size Name
-------- ---- ----- ------------- ---- ----
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-001.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-002.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-003.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-004.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-005.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-006.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-007.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-008.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-009.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-010.txt
PS /home/joakim/Documents/randomdatatest> gci | select -last 10
Directory: /home/joakim/Documents/randomdatatest
UnixMode User Group LastWriteTime Size Name
-------- ---- ----- ------------- ---- ----
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-091.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-092.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-093.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-094.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-095.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-096.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-097.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-098.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-099.txt
-rw-rw-r-- joakim joakim 8/6/2022 00:02 8128 random_file-100.txt
PS /home/joakim/Documents/randomdatatest>
Joakim Borger Svendsen. Svendsen Tech.