48 lines
1.2 KiB
PowerShell
48 lines
1.2 KiB
PowerShell
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param (
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# Specifies a path to one or more locations.
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[Parameter(Mandatory=$true,
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HelpMessage="Path to resource for which to generate integrity hash.")]
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[Alias("path", "resource")]
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[ValidateNotNullOrEmpty()]
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[string]
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$filename,
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[Parameter(HelpMessage="Desired hash algorithm.")]
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[Alias("algorithm")]
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[ValidateSet('sha256', 'sha384', 'sha512')]
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[string]
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$hashAlgo='sha384'
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)
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function hashSHA($type) {
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switch($type) {
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'sha256' { return [System.Security.Cryptography.SHA256]::Create() }
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'sha384' { return [System.Security.Cryptography.SHA384]::Create() }
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'sha512' { return [System.Security.Cryptography.SHA512]::Create() }
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default {
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Write-Host "`rUnknown hash algorithm.`r"
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exit 2
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}
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}
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}
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$fileContents = Get-Content $filename -Raw
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$hashAlgo = $hashAlgo.ToLower()
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$hashValue = hashSHA $hashAlgo
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try {
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$hashBytes = $hashValue.ComputeHash([System.Text.Encoding]::UTF8.GetBytes($fileContents))
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$hashBase64 = [System.Convert]::ToBase64String($hashBytes)
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Write-Host "`r$hashAlgo-$hashBase64`r"
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}
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catch {
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Write-Host "There was a problem generating a hash value."
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exit 1
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}
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finally {
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$hashValue.Dispose()
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}
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exit 0
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#EOF
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