52 lines
1.5 KiB
Go
52 lines
1.5 KiB
Go
package file
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import (
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"os"
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"path/filepath"
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"testing"
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)
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func TestControlledRelativePath(t *testing.T) {
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base := t.TempDir()
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inside := filepath.Join(base, "nested", "key.pem")
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relative, err := ControlledRelativePath(base, inside)
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if err != nil || relative != filepath.Join("nested", "key.pem") {
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t.Fatalf("unexpected controlled path result: %q, %v", relative, err)
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}
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if _, err := ControlledRelativePath(base, filepath.Join(base, "..", "outside.pem")); err == nil {
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t.Fatal("outside path must be rejected")
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}
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if _, err := ControlledRelativePath(base, ""); err == nil {
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t.Fatal("empty path must be rejected")
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}
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}
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func TestReadRegularFileRejectsSymlinkAndOversizedFile(t *testing.T) {
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root := t.TempDir()
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regular := filepath.Join(root, "regular.txt")
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if err := os.WriteFile(regular, []byte("safe"), 0600); err != nil {
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t.Fatal(err)
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}
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data, err := ReadRegularFile(regular, 16)
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if err != nil || string(data) != "safe" {
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t.Fatalf("regular file read failed: %q, %v", data, err)
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}
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if err := os.WriteFile(regular, []byte("too large"), 0600); err != nil {
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t.Fatal(err)
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}
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if _, err := ReadRegularFile(regular, 4); err == nil {
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t.Fatal("oversized file was accepted")
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}
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outside := filepath.Join(t.TempDir(), "outside.txt")
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if err := os.WriteFile(outside, []byte("outside"), 0600); err != nil {
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t.Fatal(err)
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}
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link := filepath.Join(root, "link.txt")
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if err := os.Symlink(outside, link); err != nil {
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t.Skipf("symlink is unavailable: %v", err)
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}
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if _, err := ReadRegularFile(link, 16); err == nil {
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t.Fatal("symlink was accepted")
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}
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}
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