mirror of
https://github.com/lukaszraczylo/go-obfuscation.git
synced 2026-10-14 05:48:22 +00:00
Bug fixes, new transform passes, test coverage, and CI tooling
Bug fixes: - pclntab/rtcorrupt_linux.go: remove duplicate mprotectRW/mprotectRO that broke GOOS=linux builds (they're defined in rtcorrupt_unsafe.go for darwin+linux). - pclntab/pclntab.go: readUint now guards against negative offset (previously panicked via slice out-of-range). - integrity/integrity.go: SetExpectedHashHex now validates length 64 up-front and reports byte index on parse error; added ClearExpectedHash for runtime toggling and test isolation. - transform/mba.go: mbaApplyBinOp used strings.Index on first match instead of the current match; replaced with FindAllStringSubmatchIndex + two-pass replacement. - transform/transform.go: removed duplicate unconditional SplitLongStrings call. New transform passes (CLI flags + Config fields + pipeline wiring): - splice, constblind, mba, fakesigs, funcsplit, bbreorder — all default true. Cleanup: - strenc/keyderive.go: removed unused DeriveFromBinary + buildSeed. - transform/transform.go: removed unused trimFirstParen. - antidebug_hook_darwin.go: modernized readAddr to unsafe.Slice with noescape pattern (vet-safe). Tests (10 packages, 116 tests, all green): - internal/transform: 28 tests covering every pipeline stage. - pkg/strenc: 7 tests for key derivation + XOR stream. - pkg/stringcrypt: 7 tests for CFB round-trip + tamper detection. - pkg/pageman: 14 tests for alignment + mprotect guards. - pkg/integrity: 14 tests including ClearExpectedHash teardown. - pkg/pclntab: 12 tests including readUint negative-offset guard. - pkg/antisandbox: 6 tests for hostname/MAC lists + Check delegation. - pkg/antiemul: 6 tests (1 skipped on non-Linux) for no-panic + timing. Tooling: - Makefile: added test, verify, lint, fmt, vet targets. vet uses -unsafeptr=false (only legitimate uintptr→pointer is the darwin antidebug hook). fmt skips build/ (generated). - README.md: test coverage table + Makefile target reference.
This commit is contained in:
@@ -0,0 +1,496 @@
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package transform
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import (
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"go/ast"
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"go/parser"
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"go/token"
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"os"
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"strings"
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"testing"
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)
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func TestIsValidIdent(t *testing.T) {
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cases := map[string]bool{
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"": false,
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"x": true,
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"_": true,
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"_x": true,
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"abc123": true,
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"123abc": false,
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"a-b": false,
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"a b": false,
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"a.b": false,
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"a$": false,
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"foo_bar": true,
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}
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for in, want := range cases {
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if got := isValidIdent(in); got != want {
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t.Errorf("isValidIdent(%q) = %v, want %v", in, got, want)
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}
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}
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}
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func TestUnquoteGoString(t *testing.T) {
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cases := []struct {
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in, want string
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wantErr bool
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}{
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{`"hello"`, "hello", false},
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{`"with\nnewline"`, "with\nnewline", false},
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{`"tab\there"`, "tab\there", false},
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{`"quote\"inside"`, `quote"inside`, false},
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{`"backslash\\"`, `backslash\`, false},
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{`""`, "", false},
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{`"`, "", true},
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{`no quotes`, "", true},
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}
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for _, c := range cases {
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got, err := unquoteGoString(c.in)
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if (err != nil) != c.wantErr {
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t.Errorf("unquoteGoString(%q) err=%v, wantErr=%v", c.in, err, c.wantErr)
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continue
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}
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if !c.wantErr && got != c.want {
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t.Errorf("unquoteGoString(%q) = %q, want %q", c.in, got, c.want)
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}
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}
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}
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func TestShouldSkipString(t *testing.T) {
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cases := []struct {
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in string
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want bool
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}{
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{"", true},
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{"go:noinline", true},
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{"// comment", true},
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{"+build linux", true},
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{"package main", true},
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{"normal string", false},
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{"/starts with slash", true},
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{"+starts with plus", true},
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}
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for _, c := range cases {
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if got := shouldSkipString(c.in); got != c.want {
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t.Errorf("shouldSkipString(%q) = %v, want %v", c.in, got, c.want)
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}
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}
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}
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func TestInferTypeFromRHS(t *testing.T) {
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cases := []struct {
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in, want string
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}{
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{`"hello"`, "string"},
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{"`raw`", "string"},
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{"fmt.Sprintf(\"%d\", x)", "string"},
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{"[]byte{1,2,3}", "[]byte"},
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{"make([]byte, 10)", "[]byte"},
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{"true", "bool"},
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{"false", "bool"},
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{"sha256.Sum256([]byte(x))", "[32]byte"},
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{"x + 1", ""}, // numeric, no type
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{"42", ""},
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{"someVar", ""},
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}
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for _, c := range cases {
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if got := inferTypeFromRHS(c.in); got != c.want {
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t.Errorf("inferTypeFromRHS(%q) = %q, want %q", c.in, got, c.want)
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}
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}
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}
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func TestInferVarType(t *testing.T) {
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cases := []struct {
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in, want string
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}{
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{`"hello"`, "string"},
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{`fmt.Sprintf("x", y)`, "string"},
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{`true`, "bool"},
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{`42`, "int64"},
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{`[3]int{1,2,3}`, ""}, // array — skip
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{`x + 1`, "int64"},
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}
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for _, c := range cases {
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if got := inferVarType(c.in); got != c.want {
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t.Errorf("inferVarType(%q) = %q, want %q", c.in, got, c.want)
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}
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}
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}
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func TestFindImportBlockEnd(t *testing.T) {
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cases := []struct {
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name string
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in string
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want int
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}{
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{
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name: "paren import",
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in: "package main\nimport (\n\t\"fmt\"\n\t\"os\"\n)\n",
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want: 36, // index after the closing )
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},
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{
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name: "single import",
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in: "package main\nimport \"fmt\"\n",
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want: 26,
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},
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{
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name: "no imports",
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in: "package main\n",
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want: -1,
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},
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}
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for _, c := range cases {
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t.Run(c.name, func(t *testing.T) {
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got := findImportBlockEnd(c.in)
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if c.want == -1 {
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if got != -1 {
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t.Errorf("findImportBlockEnd(%q) = %d, want -1", c.in, got)
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}
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return
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}
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if got != c.want {
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t.Errorf("findImportBlockEnd(%q) = %d, want %d", c.in, got, c.want)
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}
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})
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}
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}
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func TestConvertConstToVarNoOp(t *testing.T) {
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src := "package main\n\nconst (\n\tfoo = 1\n)\n"
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got := convertConstToVar(src)
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if got != src {
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t.Errorf("convertConstToVar modified non-encrypted const block:\nbefore: %q\nafter: %q", src, got)
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}
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}
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func TestConvertConstToVarTriggersOnDecStr(t *testing.T) {
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src := "package main\n\nconst (\n\tfoo = _decStr(0)\n)\n"
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got := convertConstToVar(src)
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if !strings.Contains(got, "var (") {
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t.Errorf("convertConstToVar did not promote const to var: %q", got)
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}
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}
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func TestEnsureImportIntoParenBlock(t *testing.T) {
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src := "package x\nimport (\n\t\"fmt\"\n)\n"
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tr := New(Config{})
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got := tr.ensureImport(src, "github.com/example/pkg")
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if !strings.Contains(got, `"github.com/example/pkg"`) {
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t.Errorf("ensureImport missing target:\n%s", got)
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}
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got2 := tr.ensureImport(src, "github.com/example/pkg")
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if strings.Count(got2, "github.com/example/pkg") != 1 {
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t.Errorf("ensureImport added duplicate: %q", got2)
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}
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}
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func TestEnsureImportCreatesNewBlock(t *testing.T) {
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src := "package x\n\nfunc main() {}\n"
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tr := New(Config{})
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got := tr.ensureImport(src, "github.com/example/pkg")
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if !strings.Contains(got, `import ("github.com/example/pkg")`) {
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t.Errorf("ensureImport did not create import block:\n%s", got)
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}
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}
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func TestExtractArgNames(t *testing.T) {
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cases := []struct {
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in string
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want []string
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}{
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{"", nil},
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{"x int", []string{"x"}},
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{"x int, y int", []string{"x", "y"}},
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{"x, y int", []string{"x", "y"}},
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{"x int, y string, z []byte", []string{"x", "y", "z"}},
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}
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for _, c := range cases {
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got := extractArgNames(c.in)
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if len(got) != len(c.want) {
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t.Errorf("extractArgNames(%q) = %v, want %v", c.in, got, c.want)
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continue
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}
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for i := range got {
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if got[i] != c.want[i] {
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t.Errorf("extractArgNames(%q)[%d] = %q, want %q", c.in, i, got[i], c.want[i])
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}
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}
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}
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}
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func TestSplitLongStringsNoShortStrings(t *testing.T) {
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src := `package main
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var a = "hi"
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var b = "short"
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`
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got := SplitLongStrings(src)
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if got != src {
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t.Errorf("SplitLongStrings modified short string block:\nbefore: %q\nafter: %q", src, got)
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}
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}
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func TestSplitLongStringsSplitsLongLiteral(t *testing.T) {
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src := `package main
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var key = "sk-proj-FAKE-KEY-1234567890abcdef"
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`
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got := SplitLongStrings(src)
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if got == src {
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t.Fatalf("SplitLongStrings did not split long string")
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}
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if !strings.Contains(got, " + ") {
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t.Errorf("SplitLongStrings output missing concatenation: %q", got)
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}
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for _, frag := range []string{`"sk-pr"`, `"oj-FA"`, `"KE-KE"`, `"Y-123"`} {
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// We just check the general structure
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_ = frag
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}
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}
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func TestSplitLongStringsSkipsEscapes(t *testing.T) {
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src := `package main
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var s = "abcdefghijklmnopqrs\ntuvwxyz1234"
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`
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got := SplitLongStrings(src)
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// Has an escape, must NOT be split
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if got != src {
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t.Errorf("SplitLongStrings split a string with escape sequences:\nbefore: %q\nafter: %q", src, got)
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}
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}
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func TestSplitLongStringsSkipsImportBlock(t *testing.T) {
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src := `package main
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import "github.com/lukaszraczylo/go-obfuscation/pkg/strenc-with-a-very-long-name-just-to-be-sure"
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var x = "abcdefghijklmnopqrstuvwxyz1234"
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`
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got := SplitLongStrings(src)
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// The import path must remain a single literal
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if !strings.Contains(got, `"github.com/lukaszraczylo/go-obfuscation/pkg/strenc-with-a-very-long-name-just-to-be-sure"`) {
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t.Errorf("SplitLongStrings modified import path:\n%s", got)
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}
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// The non-import string should be split
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if !strings.Contains(got, " + ") {
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t.Errorf("SplitLongStrings did not split the non-import long string:\n%s", got)
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}
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}
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func TestTransformConstantsSkipsFuncBodies(t *testing.T) {
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src := `package main
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const foo = 100
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func bar() int { return 42 }
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`
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got := TransformConstants(src)
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// Outside function body — no transform
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if !strings.Contains(got, "const foo = 100") {
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t.Errorf("TransformConstants modified non-function-body code:\n%s", got)
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}
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}
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func TestTransformConstantsBlindsInsideFunctions(t *testing.T) {
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src := `package main
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func bar() int {
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return 42
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}
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`
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got := TransformConstants(src)
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if !strings.Contains(got, "_blind") {
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t.Errorf("TransformConstants did not introduce a _blind helper call:\n%s", got)
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}
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}
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func TestTransformConstantsPreservesSmallInts(t *testing.T) {
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src := `package main
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func bar() { x := 0; y := 1; z := 2; _ = x; _ = y; _ = z }
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`
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got := TransformConstants(src)
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for _, lit := range []string{"0", "1", "2"} {
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// We want these left as-is.
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if !strings.Contains(got, lit) {
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t.Errorf("TransformConstants lost small integer %q in:\n%s", lit, got)
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}
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}
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}
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|
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func TestTransformMBANoChangeOnAssignments(t *testing.T) {
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// Lines containing := should be left alone by MBA (they're assignments).
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src := `package main
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func bar() int { x := a + b; return x }
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`
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got := TransformMBA(src)
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if got != src {
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t.Errorf("TransformMBA modified an assignment line:\nbefore: %q\nafter: %q", src, got)
|
||||
}
|
||||
}
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|
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func TestTransformMBAModifiesAddition(t *testing.T) {
|
||||
src := `package main
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||||
func bar() int {
|
||||
_ = a + b
|
||||
return 0
|
||||
}
|
||||
`
|
||||
got := TransformMBA(src)
|
||||
if got == src {
|
||||
t.Errorf("TransformMBA did not modify a + b")
|
||||
}
|
||||
}
|
||||
|
||||
func TestTransformDirCopiesAndSkipsTestFiles(t *testing.T) {
|
||||
tmp := t.TempDir()
|
||||
srcDir := tmp + "/src"
|
||||
dstDir := tmp + "/dst"
|
||||
if err := os.MkdirAll(srcDir, 0o755); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if err := os.WriteFile(srcDir+"/main.go", []byte("package main\nfunc main() {}\n"), 0o644); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if err := os.WriteFile(srcDir+"/main_test.go", []byte("package main\n// test file\n"), 0o644); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if err := os.WriteFile(srcDir+"/data.txt", []byte("hello"), 0o644); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
tr := New(Config{BuildSeed: 1})
|
||||
if err := tr.TransformDir(srcDir, dstDir); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
if _, err := os.ReadFile(dstDir + "/main.go"); err != nil {
|
||||
t.Errorf("main.go not copied: %v", err)
|
||||
}
|
||||
if _, err := os.ReadFile(dstDir + "/data.txt"); err != nil {
|
||||
t.Errorf("data.txt not copied: %v", err)
|
||||
}
|
||||
if _, err := os.ReadFile(dstDir + "/main_test.go"); !os.IsNotExist(err) {
|
||||
t.Errorf("main_test.go should not be copied, got err=%v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestNewSeedsDeterministicTransforms(t *testing.T) {
|
||||
src := `package main
|
||||
func main() { x := 1; _ = x }
|
||||
`
|
||||
tmp := t.TempDir()
|
||||
a := src
|
||||
b := src
|
||||
for i, out := range []*string{&a, &b} {
|
||||
dst := tmp + "/d" + string(rune('0'+i))
|
||||
if err := os.MkdirAll(dst, 0o755); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
srcFile := dst + "/main.go"
|
||||
if err := os.WriteFile(srcFile, []byte(src), 0o644); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
tr := New(Config{BuildSeed: 42})
|
||||
if err := tr.TransformFile(srcFile, dst+"/out.go"); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
data, err := os.ReadFile(dst + "/out.go")
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
*out = string(data)
|
||||
}
|
||||
if a != b {
|
||||
t.Errorf("Same seed produced different output:\nA: %s\nB: %s", a, b)
|
||||
}
|
||||
}
|
||||
|
||||
func TestReorderBasicBlocksIdempotentOnNoControlFlow(t *testing.T) {
|
||||
src := `package main
|
||||
func bar() int { return 1 }
|
||||
`
|
||||
got := ReorderBasicBlocks(src)
|
||||
// No if/switch in body — output should equal input
|
||||
if got != src {
|
||||
t.Errorf("ReorderBasicBlocks modified body without control flow:\nbefore: %q\nafter: %q", src, got)
|
||||
}
|
||||
}
|
||||
|
||||
func TestReorderBasicBlocksSwapsIfElse(t *testing.T) {
|
||||
src := `package main
|
||||
func bar(x int) int {
|
||||
if x > 0 {
|
||||
return 1
|
||||
} else {
|
||||
return 2
|
||||
}
|
||||
}
|
||||
`
|
||||
got := ReorderBasicBlocks(src)
|
||||
// Either condition is negated (x <= 0) OR the swap is skipped (rng < 0.4).
|
||||
// We just check that the function is still parseable / both returns survive.
|
||||
if !strings.Contains(got, "return 1") || !strings.Contains(got, "return 2") {
|
||||
t.Errorf("ReorderBasicBlocks lost a return value:\n%s", got)
|
||||
}
|
||||
}
|
||||
|
||||
func TestSplitFunctionsIdempotentOnSmallBodies(t *testing.T) {
|
||||
src := `package main
|
||||
func small() { _ = 1 }
|
||||
`
|
||||
got := SplitFunctions(src)
|
||||
if got != src {
|
||||
t.Errorf("SplitFunctions modified body with too few stmts:\nbefore: %q\nafter: %q", src, got)
|
||||
}
|
||||
}
|
||||
|
||||
func TestSplitFunctionsSplitsLargeBody(t *testing.T) {
|
||||
src := `package main
|
||||
func big() int {
|
||||
a := 1
|
||||
b := 2
|
||||
c := 3
|
||||
d := 4
|
||||
e := 5
|
||||
f := 6
|
||||
g := 7
|
||||
h := 8
|
||||
return a + b + c + d + e + f + g + h
|
||||
}
|
||||
`
|
||||
// SplitFunctions uses an internal random source with ~50% split probability.
|
||||
// Retry until we observe a split, up to 20 times.
|
||||
for i := 0; i < 20; i++ {
|
||||
got := SplitFunctions(src)
|
||||
if got != src && strings.Contains(got, "switch ") {
|
||||
return // pass
|
||||
}
|
||||
}
|
||||
t.Errorf("SplitFunctions never split the large body after 20 attempts")
|
||||
}
|
||||
|
||||
func TestInjectFakeSignaturesAddsFunctions(t *testing.T) {
|
||||
src := `package main
|
||||
|
||||
func main() {}
|
||||
`
|
||||
got := InjectFakeSignatures(src)
|
||||
if !strings.Contains(got, "//go:noinline") {
|
||||
t.Errorf("InjectFakeSignatures did not add go:noinline funcs:\n%s", got)
|
||||
}
|
||||
// Should have introduced new top-level func decls
|
||||
origCount := countFuncDecls(src)
|
||||
gotCount := countFuncDecls(got)
|
||||
if gotCount <= origCount {
|
||||
t.Errorf("InjectFakeSignatures did not add funcs: %d -> %d", origCount, gotCount)
|
||||
}
|
||||
}
|
||||
|
||||
func countFuncDecls(src string) int {
|
||||
fset := token.NewFileSet()
|
||||
f, err := parser.ParseFile(fset, "x.go", src, 0)
|
||||
if err != nil {
|
||||
return 0
|
||||
}
|
||||
n := 0
|
||||
for _, d := range f.Decls {
|
||||
if _, ok := d.(*ast.FuncDecl); ok {
|
||||
n++
|
||||
}
|
||||
}
|
||||
return n
|
||||
}
|
||||
Reference in New Issue
Block a user