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When adding a path to the local store (via `LocalStore::addToStore`), ensure that the `ca` field of the provided `ValidPathInfo` does indeed correspond to the content of the path. Otherwise any untrusted user (or any binary cache) can add arbitrary content-addressed paths to the store (as content-addressed paths don’t need a signature).
39 lines
979 B
Bash
39 lines
979 B
Bash
source common.sh
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BINARY_CACHE=file://$cacheDir
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getHash() {
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basename "$1" | cut -d '-' -f 1
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}
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getRemoteNarInfo () {
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echo "$cacheDir/$(getHash "$1").narinfo"
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}
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cat <<EOF > $TEST_HOME/good.txt
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I’m a good path
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EOF
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cat <<EOF > $TEST_HOME/bad.txt
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I’m a bad path
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EOF
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good=$(nix-store --add $TEST_HOME/good.txt)
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bad=$(nix-store --add $TEST_HOME/bad.txt)
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nix copy --to "$BINARY_CACHE" "$good"
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nix copy --to "$BINARY_CACHE" "$bad"
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nix-collect-garbage >/dev/null 2>&1
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# Falsifying the narinfo file for '$good'
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goodPathNarInfo=$(getRemoteNarInfo "$good")
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badPathNarInfo=$(getRemoteNarInfo "$bad")
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for fieldName in URL FileHash FileSize NarHash NarSize; do
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sed -i "/^$fieldName/d" "$goodPathNarInfo"
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grep -E "^$fieldName" "$badPathNarInfo" >> "$goodPathNarInfo"
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done
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# Copying back '$good' from the binary cache. This should fail as it is
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# corrupted
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if nix copy --from "$BINARY_CACHE" "$good"; then
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fail "Importing a path with a wrong CA field should fail"
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fi
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