all: base64-encode binaries that will cause Apple notarization to fail

Starting with macOS 10.15 (Catalina), Apple now requires all software
distributed outside of the App Store to be notarized. Any binaries we
distribute must abide by a strict set of requirements like code-signing
and having a minimum target SDK of 10.9 (amongst others).

Apple’s notarization service will recursively inspect archives looking to
find notarization candidate binaries. If it finds a binary that does not
meet the requirements or is unable to decompress an archive, it will
reject the entire distribution. From cursory testing, it seems that the
service uses content sniffing to determine file types, so changing
the file extension will not work.

There are some binaries and archives included in our distribution that
are being detected by Apple’s service as potential candidates for
notarization or decompression. As these are files used by tests and some
are intentionally invalid, we don’t intend to ever make them compliant.

As a workaround for this, we base64-encode any binaries or archives that
Apple’s notarization service issues a warning for, as these warnings will
become errors in January 2020.

Updates #34986

Change-Id: I106fbb6227b61eb221755568f047ee11103c1680
Reviewed-on: https://go-review.googlesource.com/c/go/+/208118
Run-TryBot: Andrew Bonventre <andybons@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

10 files changed, 43 insertions, 17 deletions

diff --git a/src/cmd/internal/buildid/buildid_test.go b/src/cmd/internal/buildid/buildid_test.go
index 15481dd762..904c2c6f37 100644
--- a/src/cmd/internal/buildid/buildid_test.go
+++ b/src/cmd/internal/buildid/buildid_test.go
@@ -7,6 +7,7 @@ package buildid
 import (
 	"bytes"
 	"crypto/sha256"
+	"internal/obscuretestdata"
 	"io/ioutil"
 	"os"
 	"reflect"
@@ -19,13 +20,6 @@ const (
 )
 
 func TestReadFile(t *testing.T) {
-	var files = []string{
-		"p.a",
-		"a.elf",
-		"a.macho",
-		"a.pe",
-	}
-
 	f, err := ioutil.TempFile("", "buildid-test-")
 	if err != nil {
 		t.Fatal(err)
@@ -34,26 +28,43 @@ func TestReadFile(t *testing.T) {
 	defer os.Remove(tmp)
 	f.Close()
 
-	for _, f := range files {
-		id, err := ReadFile("testdata/" + f)
+	// Use obscured files to prevent Apple’s notarization service from
+	// mistaking them as candidates for notarization and rejecting the entire
+	// toolchain.
+	// See golang.org/issue/34986
+	var files = []string{
+		"p.a.base64",
+		"a.elf.base64",
+		"a.macho.base64",
+		"a.pe.base64",
+	}
+
+	for _, name := range files {
+		f, err := obscuretestdata.DecodeToTempFile("testdata/" + name)
+		if err != nil {
+			t.Errorf("obscuretestdata.DecodeToTempFile(testdata/%s): %v", name, err)
+			continue
+		}
+		defer os.Remove(f)
+		id, err := ReadFile(f)
 		if id != expectedID || err != nil {
 			t.Errorf("ReadFile(testdata/%s) = %q, %v, want %q, nil", f, id, err, expectedID)
 		}
 		old := readSize
 		readSize = 2048
-		id, err = ReadFile("testdata/" + f)
+		id, err = ReadFile(f)
 		readSize = old
 		if id != expectedID || err != nil {
-			t.Errorf("ReadFile(testdata/%s) [readSize=2k] = %q, %v, want %q, nil", f, id, err, expectedID)
+			t.Errorf("ReadFile(%s) [readSize=2k] = %q, %v, want %q, nil", f, id, err, expectedID)
 		}
 
-		data, err := ioutil.ReadFile("testdata/" + f)
+		data, err := ioutil.ReadFile(f)
 		if err != nil {
 			t.Fatal(err)
 		}
 		m, _, err := FindAndHash(bytes.NewReader(data), expectedID, 1024)
 		if err != nil {
-			t.Errorf("FindAndHash(testdata/%s): %v", f, err)
+			t.Errorf("FindAndHash(%s): %v", f, err)
 			continue
 		}
 		if err := ioutil.WriteFile(tmp, data, 0666); err != nil {
@@ -68,7 +79,7 @@ func TestReadFile(t *testing.T) {
 		err = Rewrite(tf, m, newID)
 		err2 := tf.Close()
 		if err != nil {
-			t.Errorf("Rewrite(testdata/%s): %v", f, err)
+			t.Errorf("Rewrite(%s): %v", f, err)
 			continue
 		}
 		if err2 != nil {
@@ -77,7 +88,7 @@ func TestReadFile(t *testing.T) {
 
 		id, err = ReadFile(tmp)
 		if id != newID || err != nil {
-			t.Errorf("ReadFile(testdata/%s after Rewrite) = %q, %v, want %q, nil", f, id, err, newID)
+			t.Errorf("ReadFile(%s after Rewrite) = %q, %v, want %q, nil", f, id, err, newID)
 		}
 	}
 }
diff --git a/src/cmd/internal/buildid/testdata/a.elf b/src/cmd/internal/buildid/testdata/a.elf
deleted file mode 100755
index f63128921a..0000000000
--- a/src/cmd/internal/buildid/testdata/a.elf
+++ /dev/null
diff --git a/src/cmd/internal/buildid/testdata/a.elf.base64 b/src/cmd/internal/buildid/testdata/a.elf.base64
new file mode 100644
index 0000000000..fa85521735
--- /dev/null
+++ b/src/cmd/internal/buildid/testdata/a.elf.base64
@@ -0,0 +1 @@
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diff --git a/src/cmd/internal/buildid/testdata/a.macho b/src/cmd/internal/buildid/testdata/a.macho
deleted file mode 100755
index fbbd57c1fe..0000000000
--- a/src/cmd/internal/buildid/testdata/a.macho
+++ /dev/null
diff --git a/src/cmd/internal/buildid/testdata/a.macho.base64 b/src/cmd/internal/buildid/testdata/a.macho.base64
new file mode 100644
index 0000000000..2e9f6a7dff
--- /dev/null
+++ b/src/cmd/internal/buildid/testdata/a.macho.base64
@@ -0,0 +1 @@
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diff --git a/src/cmd/internal/buildid/testdata/a.pe b/src/cmd/internal/buildid/testdata/a.pe
deleted file mode 100755
index 91202728c3..0000000000
--- a/src/cmd/internal/buildid/testdata/a.pe
+++ /dev/null
diff --git a/src/cmd/internal/buildid/testdata/a.pe.base64 b/src/cmd/internal/buildid/testdata/a.pe.base64
new file mode 100644
index 0000000000..d3a31a3a62
--- /dev/null
+++ b/src/cmd/internal/buildid/testdata/a.pe.base64
@@ -0,0 +1 @@
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diff --git a/src/cmd/internal/buildid/testdata/p.a b/src/cmd/internal/buildid/testdata/p.a
deleted file mode 100644
index dcc3e76ef8..0000000000
--- a/src/cmd/internal/buildid/testdata/p.a
+++ /dev/null
diff --git a/src/cmd/internal/buildid/testdata/p.a.base64 b/src/cmd/internal/buildid/testdata/p.a.base64
new file mode 100644
index 0000000000..ba96c10ca5
--- /dev/null
+++ b/src/cmd/internal/buildid/testdata/p.a.base64
@@ -0,0 +1 @@
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
diff --git a/src/cmd/nm/nm_test.go b/src/cmd/nm/nm_test.go
index dcd9f36005..bcfd054150 100644
--- a/src/cmd/nm/nm_test.go
+++ b/src/cmd/nm/nm_test.go
@@ -6,6 +6,7 @@ package main
 
 import (
 	"fmt"
+	"internal/obscuretestdata"
 	"internal/testenv"
 	"io/ioutil"
 	"os"
@@ -57,8 +58,8 @@ func TestNonGoExecs(t *testing.T) {
 	testfiles := []string{
 		"debug/elf/testdata/gcc-386-freebsd-exec",
 		"debug/elf/testdata/gcc-amd64-linux-exec",
-		"debug/macho/testdata/gcc-386-darwin-exec",
-		"debug/macho/testdata/gcc-amd64-darwin-exec",
+		"debug/macho/testdata/gcc-386-darwin-exec.base64",   // golang.org/issue/34986
+		"debug/macho/testdata/gcc-amd64-darwin-exec.base64", // golang.org/issue/34986
 		// "debug/pe/testdata/gcc-amd64-mingw-exec", // no symbols!
 		"debug/pe/testdata/gcc-386-mingw-exec",
 		"debug/plan9obj/testdata/amd64-plan9-exec",
@@ -67,6 +68,16 @@ func TestNonGoExecs(t *testing.T) {
 	}
 	for _, f := range testfiles {
 		exepath := filepath.Join(runtime.GOROOT(), "src", f)
+		if strings.HasSuffix(f, ".base64") {
+			tf, err := obscuretestdata.DecodeToTempFile(exepath)
+			if err != nil {
+				t.Errorf("obscuretestdata.DecodeToTempFile(%s): %v", exepath, err)
+				continue
+			}
+			defer os.Remove(tf)
+			exepath = tf
+		}
+
 		cmd := exec.Command(testnmpath, exepath)
 		out, err := cmd.CombinedOutput()
 		if err != nil {