SimpleSodiumPS

0.0.1

functions/private/Find-SodiumLibrary.ps1

function Find-SodiumLibrary {
    $arch = [System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture
    $archStr = switch ($arch) {
        ([System.Runtime.InteropServices.Architecture]::X64)   { 'x64'   }
        ([System.Runtime.InteropServices.Architecture]::Arm64) { 'arm64' }
        ([System.Runtime.InteropServices.Architecture]::X86)   { 'x86'   }
        default { throw "Unsupported CPU architecture: $arch" }
    }

    $isWindows = [System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform([System.Runtime.InteropServices.OSPlatform]::Windows)
    $isLinux   = [System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform([System.Runtime.InteropServices.OSPlatform]::Linux)
    $isMacOS   = [System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform([System.Runtime.InteropServices.OSPlatform]::OSX)

    if      ($isWindows) { $rid = "win-$archStr";   $libFile = 'libsodium.dll'   }
    elseif  ($isLinux)   { $rid = "linux-$archStr"; $libFile = 'libsodium.so'    }
    elseif  ($isMacOS)   { $rid = "osx-$archStr";   $libFile = 'libsodium.dylib' }
    else { throw 'Unsupported operating system.' }

    $nativeDir  = Join-Path $script:moduleRoot 'native' $rid
    $cachedPath = Join-Path $nativeDir $libFile

    if (Test-Path $cachedPath) {
        return $cachedPath
    }

    $nupkgUrl = 'https://api.nuget.org/v3-flatcontainer/libsodium/1.0.18/libsodium.1.0.18.nupkg'
    $tmpFile  = [System.IO.Path]::GetTempFileName()
    try {
        Write-Verbose "[SimpleSodiumPS] Downloading libsodium 1.0.18 from NuGet..."
        Invoke-WebRequest -Uri $nupkgUrl -OutFile $tmpFile -UseBasicParsing

        $null = New-Item -ItemType Directory -Path $nativeDir -Force

        Add-Type -AssemblyName System.IO.Compression.FileSystem
        $zip = [System.IO.Compression.ZipFile]::OpenRead($tmpFile)
        try {
            $entryPath = "runtimes/$rid/native/$libFile"
            $entry = $zip.Entries | Where-Object { $_.FullName -eq $entryPath }
            if (-not $entry) {
                throw "libsodium NuGet package does not contain '$entryPath'. Platform '$rid' may not be supported."
            }
            [System.IO.Compression.ZipFileExtensions]::ExtractToFile($entry, $cachedPath, $true)
        } finally {
            $zip.Dispose()
        }

        if (-not $isWindows) {
            & chmod +x $cachedPath
        }

        Write-Verbose "[SimpleSodiumPS] libsodium cached at: $cachedPath"
        return $cachedPath
    } finally {
        Remove-Item $tmpFile -ErrorAction SilentlyContinue
    }
}