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package e2e
import (
"fmt"
"os/exec"
"strings"
"testing"
)
func FuzzArgumentIntegrity(f *testing.F) {
f.Add("; rm -rf /")
f.Add("$(whoami)")
f.Add(" spaced ")
f.Add("\"'\"'\"")
f.Add("\x00null\x00")
f.Fuzz(func(t *testing.T, payload string) {
binaryPath, err := GetBinaryPath()
if err != nil {
t.Skip("Skipping E2E fuzz test: wg-wrap binary not found (WG_WRAP_BIN not set)")
}
out, err := exec.Command(binaryPath, "test-args", payload).CombinedOutput()
if strings.Contains(payload, "\x00") {
if err != nil || strings.Contains(string(out), "contains null byte") {
return
}
}
if err != nil {
// If we hit a system limit (like disk quota in /tmp during heavy fuzzing),
// it's an environmental issue, not a bug in our binary.
if strings.Contains(string(out), "disk quota exceeded") ||
strings.Contains(string(out), "no space left on device") {
return
}
t.Fatalf("Binary crashed for payload %q: %v\nOutput: %s", payload, err, string(out))
}
lines := strings.Split(strings.TrimSpace(string(out)), "\n")
if len(lines) < 3 {
t.Fatalf("Unexpected output format for payload %q\nOutput: %s", payload, string(out))
}
parts := strings.Split(lines[len(lines)-1], ":")
if len(parts) < 2 {
t.Fatalf("Malformed hex line for payload %q: %s", payload, lines[len(lines)-1])
}
if parts[1] != fmt.Sprintf("%x", payload) {
t.Errorf("8-bit mismatch!\nSent Hex: %s\nRecv Hex: %s\nPayload: %q", fmt.Sprintf("%x", payload), parts[1], payload)
}
})
}
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