mirror of
https://github.com/fleschutz/PowerShell.git
synced 2024-11-15 04:24:01 +01:00
128 lines
3.6 KiB
PowerShell
128 lines
3.6 KiB
PowerShell
<#
|
|
.SYNOPSIS
|
|
Checks a file
|
|
.DESCRIPTION
|
|
This PowerShell script determines and prints the file type of the given file.
|
|
.PARAMETER Path
|
|
Specifies the path to the file
|
|
.EXAMPLE
|
|
PS> ./check-file C:\my.exe
|
|
.LINK
|
|
https://github.com/fleschutz/PowerShell
|
|
.NOTES
|
|
Author: Markus Fleschutz | License: CC0
|
|
#>
|
|
|
|
param([string]$Path = "")
|
|
|
|
|
|
function Check-Header { param( $path )
|
|
$path = Resolve-Path $path
|
|
|
|
# Hexidecimal signatures for expected files
|
|
$known = @'
|
|
"Extension","Header"
|
|
"3gp","66 74 79 70 33 67"
|
|
"7z","37 7A BC AF 27 1C"
|
|
"8sv","38 53 56 58"
|
|
"8svx","46 4F 52 4D nn nn nn nn"
|
|
"acbm","46 4F 52 4D nn nn nn nn"
|
|
"aif","41 49 46 46"
|
|
"aiff","46 4F 52 4D nn nn nn nn"
|
|
"anbm","46 4F 52 4D nn nn nn nn"
|
|
"anim","46 4F 52 4D nn nn nn nn "
|
|
"asf","30 26 B2 75 8E 66 CF 11"
|
|
"avi","52 49 46 46 nn nn nn nn "
|
|
"bac","42 41 43 4B 4D 49 4B 45"
|
|
"bpg","42 50 47 FB"
|
|
"cab","4D 53 43 46"
|
|
"cin","80 2A 5F D7"
|
|
"class","CA FE BA BE"
|
|
"cmus","46 4F 52 4D nn nn nn nn"
|
|
"cr2","49 49 2A 00 10 00 00 00"
|
|
"crx","43 72 32 34"
|
|
"cwk","05 07 00 00 42 4F 42 4F"
|
|
"cwk","06 07 E1 00 42 4F 42 4F"
|
|
"dat","50 4D 4F 43 43 4D 4F 43"
|
|
"DBA","BE BA FE CA"
|
|
"DBA","00 01 42 44"
|
|
"dex","64 65 78 0A 30 33 35 00"
|
|
"djvu","41 54 26 54 46 4F 52 4D nn nn nn nn 44 4A 56"
|
|
"dmg","78 01 73 0D 62 62 60"
|
|
"doc","D0 CF 11 E0 A1 B1 1A E1"
|
|
"dpx","53 44 50 58"
|
|
"exr","76 2F 31 01"
|
|
"fax","46 41 58 58"
|
|
"faxx","46 4F 52 4D nn nn nn nn"
|
|
"fh8","41 47 44 33"
|
|
"fits","53 49 4D 50 4C 45 20 20"
|
|
"flac","66 4C 61 43"
|
|
"flif","46 4C 49 46"
|
|
"ftxt","46 4F 52 4D nn nn nn nn"
|
|
"gif","47 49 46 38 37 61"
|
|
"ico","00 00 01 00"
|
|
"idx","49 4E 44 58"
|
|
"iff","41 43 42 4D"
|
|
"iff","41 4E 42 4D"
|
|
"iff","41 4E 49 4D"
|
|
"iff","46 4F 52 4D nn nn nn nn"
|
|
"ilbm","46 4F 52 4D nn nn nn nn"
|
|
"iso","43 44 30 30 31"
|
|
"jpg","FF D8 FF DB"
|
|
"lbm","49 4C 42 4D"
|
|
"lz","4C 5A 49 50"
|
|
"lz4","04 22 4D 18"
|
|
"mid","4D 54 68 64"
|
|
"mkv","1A 45 DF A3"
|
|
"MLV","4D 4C 56 49"
|
|
"mus","43 4D 55 53"
|
|
"nes","4E 45 53 1A"
|
|
"ods","50 4B 05 06"
|
|
"ogg","4F 67 67 53"
|
|
"PDB","00 00 00 00 00 00 00 00"
|
|
"pdf","25 50 44 46"
|
|
"png","89 50 4E 47 0D 0A 1A 0A"
|
|
"ps","25 21 50 53"
|
|
"psd","38 42 50 53"
|
|
"rar","52 61 72 21 1A 07 00"
|
|
"rar","52 61 72 21 1A 07 01 00"
|
|
"smu","53 4D 55 53"
|
|
"smus","46 4F 52 4D nn nn nn nn"
|
|
"stg","4D 49 4C 20"
|
|
"tar","75 73 74 61 72 00 30 30"
|
|
"TDA","00 01 44 54"
|
|
"tif","49 49 2A 00"
|
|
"toast","45 52 02 00 00 00"
|
|
"tox","74 6F 78 33"
|
|
"txt","46 54 58 54"
|
|
"vsdx","50 4B 07 08"
|
|
"wav","52 49 46 46 nn nn nn nn"
|
|
"wma","A6 D9 00 AA 00 62 CE 6C"
|
|
"xar","78 61 72 21"
|
|
"yuv","59 55 56 4E"
|
|
"yuvn","46 4F 52 4D nn nn nn nn"
|
|
"zip","50 4B 03 04"
|
|
"epub","50 4B 03 04 0A 00 02 00"
|
|
'@ | ConvertFrom-Csv | sort {$_.header.length} -Descending
|
|
|
|
$known | % {$_.header = $_.header -replace '\s'}
|
|
|
|
try {
|
|
# Get content of each file (up to 4 bytes) for analysis
|
|
$HeaderAsHexString = New-Object System.Text.StringBuilder
|
|
[Byte[]](Get-Content -Path $path -TotalCount 4 -Encoding Byte -ea Stop) | % {
|
|
if (("{0:X}" -f $_).length -eq 1) {
|
|
$null = $HeaderAsHexString.Append('0{0:X}' -f $_)
|
|
} else {
|
|
$null = $HeaderAsHexString.Append('{0:X}' -f $_)
|
|
}
|
|
}
|
|
|
|
# Validate file header
|
|
# might change .startswith() to -match.
|
|
# might remove 'select -f 1' to get all possible matching extensions, or just somehow make it a better match.
|
|
$known | ? {$_.header.startswith($HeaderAsHexString.ToString())} | select -f 1 | % {$_.extension}
|
|
} catch {}
|
|
}
|
|
|
|
Check-Header $Path |