mirror of
https://github.com/Abdess/retroarch_system.git
synced 2026-10-10 21:43:23 -05:00
Abdessamad Derraz
9001ebb992
The manifest is untrusted input. It is now read under a size limit and validated before use: destinations are contained below the BIOS root, repo_path stays inside bios/, release_asset is a basename, hashes match their shape, declared totals match their lists, and every entry has a download source. Downloads stream against the declared size, are checked by SHA-256 then SHA-1, land in a per-process temporary file and are installed with os.replace. Copies into standalone-emulator directories are opt-in with --standalone-copies so a detection never writes outside the selected tree. Both bootstraps verify install.py against an embedded SHA-256 before running it, and require the Python version install.py actually needs. A target that publishes no core list is a target with no filter, not a broken manifest: rejecting it disabled --target for the whole platform.
64 lines
2.8 KiB
PowerShell
64 lines
2.8 KiB
PowerShell
# One-line bootstrap and local wrapper. The downloaded installer is accepted
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# only when it matches the SHA-256 embedded in this wrapper.
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[CmdletBinding()]
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param(
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[Parameter(ValueFromRemainingArguments = $true)]
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[string[]]$InstallerArguments
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)
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$ErrorActionPreference = "Stop"
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$defaultInstallUrl = "https://raw.githubusercontent.com/Abdess/retrobios/main/install.py"
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$defaultInstallSha256 = "79630030c1b7445e2df02bcf0272c4530d24827b2589780b214489ab036d2e8c"
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$maximumInstallerBytes = 2MB
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$installer = if ($PSScriptRoot) { Join-Path $PSScriptRoot "install.py" } else { $null }
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$temporary = $null
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try {
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if (-not $installer -or -not (Test-Path -LiteralPath $installer -PathType Leaf)) {
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$url = if ($env:RETROBIOS_INSTALL_URL) { $env:RETROBIOS_INSTALL_URL } else { $defaultInstallUrl }
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$expected = if ($env:RETROBIOS_INSTALL_SHA256) { $env:RETROBIOS_INSTALL_SHA256 } else { $defaultInstallSha256 }
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$uri = [Uri]$url
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if ($uri.Scheme -ne "https") {
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throw "RETROBIOS_INSTALL_URL must use HTTPS."
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}
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if ($expected -notmatch '^[0-9a-fA-F]{64}$') {
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throw "Installer SHA-256 must contain exactly 64 hexadecimal characters."
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}
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$temporary = Join-Path ([IO.Path]::GetTempPath()) ("retrobios-install-{0}.py" -f [Guid]::NewGuid())
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Invoke-WebRequest -Uri $uri -OutFile $temporary -UseBasicParsing
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if ((Get-Item -LiteralPath $temporary).Length -gt $maximumInstallerBytes) {
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throw "Downloaded installer exceeds the size limit."
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}
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$actual = (Get-FileHash -LiteralPath $temporary -Algorithm SHA256).Hash.ToLowerInvariant()
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if ($actual -ne $expected.ToLowerInvariant()) {
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throw "install.py SHA-256 mismatch."
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}
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$installer = $temporary
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}
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$python = Get-Command py -ErrorAction SilentlyContinue
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if ($python) {
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& $python.Source -3 -c "import sys; raise SystemExit(sys.version_info < (3, 8))"
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if ($LASTEXITCODE -ne 0) { throw "Python 3.8 or newer is required." }
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& $python.Source -3 $installer @InstallerArguments
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if ($LASTEXITCODE -ne 0) { throw "RetroBIOS installer failed with exit code $LASTEXITCODE." }
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return
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}
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$python = Get-Command python3 -ErrorAction SilentlyContinue
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if (-not $python) {
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$python = Get-Command python -ErrorAction SilentlyContinue
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}
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if (-not $python) {
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throw "Python 3.8 or newer is required."
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}
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& $python.Source -c "import sys; raise SystemExit(sys.version_info < (3, 8))"
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if ($LASTEXITCODE -ne 0) { throw "Python 3.8 or newer is required." }
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& $python.Source $installer @InstallerArguments
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if ($LASTEXITCODE -ne 0) { throw "RetroBIOS installer failed with exit code $LASTEXITCODE." }
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}
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finally {
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if ($temporary -and (Test-Path -LiteralPath $temporary)) {
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Remove-Item -LiteralPath $temporary -Force
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}
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}
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