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How to get boolean result of md5sum from two files in powershell
I had this question after viewing md5sum check using powershell v 1.0.
Hi Experts,
this is an extension to my above question.
could you pls help how to loop thru a directory and get md5sum on each file and find the same file on another directory and run the md5sum and return true or false
Say directory1 has 3 files and directory2 has 10 files.
Loop through each file in directory1 get md5 and find same file in directory2 and get md5 too
Get a summary of each file to a output file
output.txt
file1 = success
file2 = success
file3 = failure (md5 value did not match)
Hi Experts,
this is an extension to my above question.
could you pls help how to loop thru a directory and get md5sum on each file and find the same file on another directory and run the md5sum and return true or false
Say directory1 has 3 files and directory2 has 10 files.
Loop through each file in directory1 get md5 and find same file in directory2 and get md5 too
Get a summary of each file to a output file
output.txt
file1 = success
file2 = success
file3 = failure (md5 value did not match)
Do more with
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Try something like this
$directory1 = '\\server\share\folder1'
$directory2 = '\\server\share\folder2'
$files = GCI $directory1
ForEach ($f in $files) {
$hash1 = Get-FileHash $f.fullname
$hash2 = Get-FileHash (Join-Path $directory2 $f.name)
Write-Host $f.name ($hash1 -eq $hash2)
}
Function Get-FileHash
{
[CmdletBinding(DefaultParameterSetName = 'Path')]
param(
[System.String[]]
$Path,
[Alias('PSPath')]
[System.String[]]
$LiteralPath,
[System.String]
$Algorithm='SHA256'
)
# Construct the strongly-typed crypto object
$hasher = [System.Security.Cryptography.HashAlgorithm]::Create($Algorithm)
$pathsToProcess = @()
if($PSCmdlet.ParameterSetName -eq 'LiteralPath')
{
$pathsToProcess += Resolve-Path -LiteralPath $LiteralPath
}
else
{
$pathsToProcess += Resolve-Path $Path
}
foreach($filePath in $pathsToProcess)
{
if(Test-Path -LiteralPath $filePath -PathType Container)
{
continue
}
try
{
# Read the file specified in $FilePath as a Byte array
[system.io.stream]$stream = [system.io.file]::OpenRead($FilePath)
# Compute file-hash using the crypto object
[Byte[]] $computedHash = $hasher.ComputeHash($stream)
}
catch [Exception]
{
$errorMessage = [Microsoft.PowerShell.Commands.UtilityResources]::FileReadError -f $FilePath, $_
Write-Error -Message $errorMessage -Category ReadError -ErrorId 'FileReadError' -TargetObject $FilePath
return
}
finally
{
if($stream)
{
$stream.Close()
}
}
# Convert to hex-encoded string
[string] $hash = [BitConverter]::ToString($computedHash) -replace '-',''
$retVal = [PSCustomObject] @{
Algorithm = $Algorithm.ToUpperInvariant()
Hash = $hash
Path = $filePath
}
$retVal.psobject.TypeNames.Insert(0, 'Microsoft.Powershell.Utility.FileHash')
$retVal
}
}
$myobject = @()
$directory1 = read-host('Input Directory 1 Location')
if (!(test-path $directory1)) {
write-output ('invalid path:{0}' -f $directory1)
break
}
$directory2 = read-host('Input Directory 2 Location')
if (!(test-path $directory2)) {
write-output ('invalid path:{0}' -f $directory2)
break
}
if( $directory2[$directory2.Length -1] -ne '\'){
$directory2 += '\'
}
$files = get-childitem -path $directory1 -File
foreach ($file in $files){
$hash = Get-FileHash $file.fullname
$object = new-object -Typename psobject
$object | add-member -MemberType NoteProperty -Name 'Filename' -Value $file.name
$object | add-member -MemberType NoteProperty -Name 'Hash' -Value $hash.Hash
$myobject += $object
}
$myobject2 = @()
foreach ($file in $myobject)
{
$testfile = $directory2 + $file.filename
if(!(Test-path $testfile)) {
write-output ('{0} not found' -f $testfile)
break
}
else {
$successful = '= Success'
$hash = Get-FileHash $testfile
if ($file.hash -ne $hash.hash){
$successful = '= Failure (md5 value not match)'
}
write-output('{0} = {1}' -f $file.fileName,$successful)
$object = new-object -Typename psobject
$object | add-member -MemberType NoteProperty -Name 'Filename' -Value $file.Filename
$object | add-member -MemberType NoteProperty -Name 'Success' -Value $successful
$myobject2 += $object
}
$myobject2 | out-file c:\test2\ee.txt
}
Thanks Carlo, that looks neat but I believe 1.0 doesn't support this
thanks David, I will try tonight, as I'm away from my pc. btw how should call this function? how to pass the two directory as parameter (sorry I'm sort of new to powershell)
thanks David, I will try tonight, as I'm away from my pc. btw how should call this function? how to pass the two directory as parameter (sorry I'm sort of new to powershell)
Using the same function from the other post, I would keep it simple create 2 arrays with a list of files and hashes and then use compare-object to find the differences.
I find Compare-Object a simple way to compare arrays.
Function Get-FileHash
{
[CmdletBinding(DefaultParameterSetName = "Path")]
param(
[System.String[]]
$Path,
[Alias("PSPath")]
[System.String[]]
$LiteralPath,
[System.String]
$Algorithm="SHA256"
)
# Construct the strongly-typed crypto object
$hasher = [System.Security.Cryptography.HashAlgorithm]::Create($Algorithm)
$pathsToProcess = @()
if($PSCmdlet.ParameterSetName -eq "LiteralPath")
{
$pathsToProcess += Resolve-Path -LiteralPath $LiteralPath
}
else
{
$pathsToProcess += Resolve-Path $Path
}
foreach($filePath in $pathsToProcess)
{
if(Test-Path -LiteralPath $filePath -PathType Container)
{
continue
}
try
{
# Read the file specified in $FilePath as a Byte array
[system.io.stream]$stream = [system.io.file]::OpenRead($FilePath)
# Compute file-hash using the crypto object
[Byte[]] $computedHash = $hasher.ComputeHash($stream)
}
catch [Exception]
{
$errorMessage = [Microsoft.PowerShell.Commands.UtilityResources]::FileReadError -f $FilePath, $_
Write-Error -Message $errorMessage -Category ReadError -ErrorId "FileReadError" -TargetObject $FilePath
return
}
finally
{
if($stream)
{
$stream.Close()
}
}
# Convert to hex-encoded string
[string] $hash = [BitConverter]::ToString($computedHash) -replace '-',''
$retVal = [PSCustomObject] @{
Algorithm = $Algorithm.ToUpperInvariant()
Hash = $hash
Path = $filePath
}
$retVal.psobject.TypeNames.Insert(0, "Microsoft.Powershell.Utility.FileHash")
$retVal
}
}
$arr1 = gci -Recurse c:\temp\folder1 | % {
Get-FileHash $_.fullname} | select `
@{n="Hash";e={$_.item("hash")}}, `
@{n="algorithm";e={$_.item("algorithm")}}, `
@{n="Path";e={$_.item("path")}
}
$arr2 = gci -Recurse c:\temp\folder2 | % {
Get-FileHash $_.fullname} | select `
@{n="Hash";e={$_.item("hash")}}, `
@{n="algorithm";e={$_.item("algorithm")}}, `
@{n="Path";e={$_.item("path")}
}
Compare-Object -ReferenceObject $arr1 -DifferenceObject $arr2 -Property hash | % {
$indicator = $_
if ($indicator.sideindicator -eq "<=")
{
$arr1 | ? {$_.hash -eq $indicator.hash}
}
else
{
$arr2 | ? {$_.hash -eq $indicator.hash}
}
}
I find Compare-Object a simple way to compare arrays.
Hi David,
Thanks very much...that worked fine for me, I will attempt how to pass two directories as arguments to that function.
@Learnctx,
I changed the path in the function but I rece. below blank report. I'm sure I did something wrong...sorry :(
PS C:\parent\scripts> .\compareMD52.ps1
Hash algorithm Path
---- --------- ----
Thanks very much...that worked fine for me, I will attempt how to pass two directories as arguments to that function.
@Learnctx,
I changed the path in the function but I rece. below blank report. I'm sure I did something wrong...sorry :(
PS C:\parent\scripts> .\compareMD52.ps1
Hash algorithm Path
---- --------- ----
Test-something -directory1 c:\temp -directory2 C:\test2
Test-something c:\temp C:\test2
Test-something c:\temp c:\test2 -verbose #shows files as compared
Test-something c:\temp c:\test2 -debug #opens output file when done
Test-something c:\temp C:\test2
Test-something c:\temp c:\test2 -verbose #shows files as compared
Test-something c:\temp c:\test2 -debug #opens output file when done
Function Get-FileHash
{
[CmdletBinding(DefaultParameterSetName = 'Path')]
param(
[System.String[]]
$Path,
[Alias('PSPath')]
[System.String[]]
$LiteralPath,
[System.String]
$Algorithm='SHA256'
)
# Construct the strongly-typed crypto object
$hasher = [System.Security.Cryptography.HashAlgorithm]::Create($Algorithm)
$pathsToProcess = @()
if($PSCmdlet.ParameterSetName -eq 'LiteralPath')
{
$pathsToProcess += Resolve-Path -LiteralPath $LiteralPath
}
else
{
$pathsToProcess += Resolve-Path $Path
}
foreach($filePath in $pathsToProcess)
{
if(Test-Path -LiteralPath $filePath -PathType Container)
{
continue
}
try
{
# Read the file specified in $FilePath as a Byte array
[system.io.stream]$stream = [system.io.file]::OpenRead($FilePath)
# Compute file-hash using the crypto object
[Byte[]] $computedHash = $hasher.ComputeHash($stream)
}
catch [Exception]
{
$errorMessage = [Microsoft.PowerShell.Commands.UtilityResources]::FileReadError -f $FilePath, $_
Write-Error -Message $errorMessage -Category ReadError -ErrorId 'FileReadError' -TargetObject $FilePath
return
}
finally
{
if($stream)
{
$stream.Close()
}
}
# Convert to hex-encoded string
[string] $hash = [BitConverter]::ToString($computedHash) -replace '-',''
$retVal = [PSCustomObject] @{
Algorithm = $Algorithm.ToUpperInvariant()
Hash = $hash
Path = $filePath
}
$retVal.psobject.TypeNames.Insert(0, 'Microsoft.Powershell.Utility.FileHash')
$retVal
}
}
function Test-Something
{
<#
.SYNOPSIS
Short Description
.DESCRIPTION
Detailed Description
.EXAMPLE
Test-Something
explains how to use the command
can be multiple lines
.EXAMPLE
Test-Something
another example
can have as many examples as you like
.EXAMPLE
Test-something -directory1 c:\temp -directory2 C:\test2
.EXAMPLE
Test-something c:\temp C:\test2
#>
[CmdletBinding()]
param
(
[Parameter(Mandatory=$false, Position=0)]
[Object]
$directory1 = (read-host('Input Directory 1 Location')),
[Parameter(Mandatory=$false, Position=1)]
[Object]
$directory2 =(read-host('Input Directory 2 Location'))
)
if (!(test-path $directory1)) {
write-output ('invalid path:{0}' -f $directory1)
break
}
if (!(test-path $directory2)) {
write-output ('invalid path:{0}' -f $directory2)
break
}
if( $directory2[$directory2.Length -1] -ne '\'){
$directory2 += '\'
}
$myobject = @()
$files = get-childitem -path $directory1 -File
foreach ($file in $files){
$hash = Get-FileHash $file.fullname
$object = new-object -Typename psobject
$object | add-member -MemberType NoteProperty -Name 'Filename' -Value $file.name
$object | add-member -MemberType NoteProperty -Name 'Hash' -Value $hash.Hash
$myobject += $object
}
$myobject2 = @()
foreach ($file in $myobject)
{
$testfile = $directory2 + $file.filename
if(!(Test-path $testfile)) {
write-output ('{0} not found' -f $testfile)
break
}
else {
$successful = '= Success'
$hash = Get-FileHash $testfile
if ($file.hash -ne $hash.hash){
$successful = '= Failure (md5 value not match)'
}
write-verbose('{0} = {1}' -f $file.fileName,$successful)
$object = new-object -Typename psobject
$object | add-member -MemberType NoteProperty -Name 'Filename' -Value $file.Filename
$object | add-member -MemberType NoteProperty -Name 'Success' -Value $successful
$myobject2 += $object
}
$myobject2 | out-file c:\test2\ee.txt
}
if($DebugPreference -ne 'SilentlyContinue') {
c:\test2\ee.txt
}
}
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