Source: golang-github-kr-binarydist Version: 0.0~git20120828.0.9955b0a-1 Severity: wishlist Tags: patch User: reproducible-builds@lists.alioth.debian.org Usertags: locale X-Debbugs-Cc: reproducible-builds@lists.alioth.debian.org
Hi, While working on the "reproducible builds" effort [1], we have noticed that golang-github-kr-binarydist could not be built reproducibly. When building the package, some test functions are run that generate random test files. The randomness for those test files is provided by the kernel (through the crypto/rand go package). The attached patch fixes this by generating deterministic pseudorandom test files instead (by means of the rand go package and setting a fixed seed). The function that creates this test files is only used for testing purposes, and as such, I believe there's no security concern. But I'm not familiar with the package, so please, double check it. Also, consider sending this patch upstream :) Once applied, golang-github-kr-binarydist can be built reproducibly in our current experimental framework. [1]: https://wiki.debian.org/ReproducibleBuilds Regards, -- Dhole
diff -Nru
golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/debian/changelog
golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/debian/changelog
--- golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/debian/changelog
2016-06-29 22:09:09.000000000 +0200
+++ golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/debian/changelog
2016-07-04 01:21:45.000000000 +0200
@@ -1,3 +1,10 @@
+golang-github-kr-binarydist (0.0~git20120828.0.9955b0a-1.1) UNRELEASED;
urgency=medium
+
+ * Non-maintainer upload.
+ * Make test files deterministic to make the package build reproducible.
+
+ -- Eduard Sanou <dh...@openmailbox.org> Mon, 04 Jul 2016 01:21:16 +0200
+
golang-github-kr-binarydist (0.0~git20120828.0.9955b0a-1) unstable;
urgency=medium
* Initial release (Closes: 823342)
diff -Nru
golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/debian/patches/deterministic-test-files.patch
golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/debian/patches/deterministic-test-files.patch
---
golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/debian/patches/deterministic-test-files.patch
1970-01-01 01:00:00.000000000 +0100
+++
golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/debian/patches/deterministic-test-files.patch
2016-07-04 01:23:15.000000000 +0200
@@ -0,0 +1,56 @@
+Description: Deterministic test files
+ Make the files written during tests deterministic to make this package build
+ reproducible.
+Author: Eduard Sanou <dh...@openmailbox.org>
+
+--- golang-github-kr-binarydist-0.0~git20120828.0.9955b0a.orig/common_test.go
++++ golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/common_test.go
+@@ -1,10 +1,10 @@
+ package binarydist
+
+ import (
+- "crypto/rand"
+ "io"
+ "io/ioutil"
+ "os"
++ "rand"
+ )
+
+ func mustOpen(path string) *os.File {
+@@ -67,8 +67,9 @@ func fileCmp(a, b *os.File) int64 {
+ return -1
+ }
+
+-func mustWriteRandFile(path string, size int) *os.File {
++func mustWriteRandFile(path string, size int, seed int64) *os.File {
+ p := make([]byte, size)
++ rand.Seed(seed)
+ _, err := rand.Read(p)
+ if err != nil {
+ panic(err)
+--- golang-github-kr-binarydist-0.0~git20120828.0.9955b0a.orig/diff_test.go
++++ golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/diff_test.go
+@@ -13,8 +13,8 @@ var diffT = []struct {
+ new *os.File
+ }{
+ {
+- old: mustWriteRandFile("test.old", 1e3),
+- new: mustWriteRandFile("test.new", 1e3),
++ old: mustWriteRandFile("test.old", 1e3, 1),
++ new: mustWriteRandFile("test.new", 1e3, 2),
+ },
+ {
+ old: mustOpen("testdata/sample.old"),
+--- golang-github-kr-binarydist-0.0~git20120828.0.9955b0a.orig/patch_test.go
++++ golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/patch_test.go
+@@ -8,8 +8,8 @@ import (
+ )
+
+ func TestPatch(t *testing.T) {
+- mustWriteRandFile("test.old", 1e3)
+- mustWriteRandFile("test.new", 1e3)
++ mustWriteRandFile("test.old", 1e3, 1)
++ mustWriteRandFile("test.new", 1e3, 2)
+
+ got, err := ioutil.TempFile("/tmp", "bspatch.")
+ if err != nil {
diff -Nru
golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/debian/patches/series
golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/debian/patches/series
--- golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/debian/patches/series
1970-01-01 01:00:00.000000000 +0100
+++ golang-github-kr-binarydist-0.0~git20120828.0.9955b0a/debian/patches/series
2016-07-04 01:22:10.000000000 +0200
@@ -0,0 +1 @@
+deterministic-test-files.patch
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