First, remove the shuffling of the declarations list within each file.
This is what we used at the very start to shuffle positions. Ever since
we started obfuscating positions via //line comments, that has been
entirely unnecessary.
Second, add a proper test that will fail if we don't obfuscate line
numbers well enough. Filenames were already decently covered by other
tests.
Third, simplify the line obfuscation code. It does not require
astutil.Apply, and ranging over file.Decls is easier.
Finally, also obfuscate the position of top-level vars, since we only
used to do it for top-level funcs. Without that fix, the test would fail
as varLines was unexpectedly sorted.
For now, this only implements reversing of exported names which are
hashed with action IDs. Many other kinds of obfuscation, like positions
and private names, are not yet implemented.
Note that we don't document this new command yet on purpose, since it's
not finished.
Some other minor cleanups were done for future changes, such as making
transformLineInfo into a method that also receives the original
filename, and making header names more self-describing.
Updates #5.
If code includes a linkname directive pointing at a name in an imported
package, like:
//go:linkname localName importedpackage.RemoteName
func localName()
We should rewrite the comment to replace "RemoteName" with its
obfuscated counterpart, if the package in question was obfuscated and
that name was as well.
We already had some code to handle linkname directives, but only to
ensure that "localName" was never obfuscated. This behavior is kept, to
ensure that the directive applies to the right name. In the future, we
could instead rewrite "localName" in the directive, like we do with
"RemoteName".
Add plenty of tests, too. The linkname directive used to be tested in
imports.txt and syntax.txt, but that was hard to maintain as each file
tested different edge cases.
Now that we have build caching, adding one extra testscript file isn't a
big problem anymoree. Add linkname.txt, which is self-explanatory. The
other two scripts also get a bit less complex.
Fixes#197.
First, we don't need the nameSpecialDirectives list as a separate thing.
cgo types aren't obfuscated anymore, so the only item in that list that
made a difference in the tests was go:linkname, which we'll overhaul
soon. For now, keep its code around.
Second, processDetachedDirectives can be replaced by just seven lines.
Third, we don't need to separate build tag directives from the rest of
the detached directives. Their relative order (with other comments) does
not matater.
Fourth and last, ranging over a nil slice is a no-op, so a nil check
around a slice range is unnecessary.
This is some prep work to make the patch to support go:linkname smaller
and easier to review.
Previously garble heavily used env vars to share data between processes.
This also makes it easy to share complex data between processes.
The complexity of main.go is considerably reduced.
More correct comments transformation was implemented.
Added processing of //go:linkname localname [importpath.name] directive, now localname is not renamed. This is safe and does not cause a name disclosure because the functions marked //linkname do not have a name in the resulting binary.
Added cgo directives support
Fixed filename leak protection for cgo
Part of #149
Added cleanup of the Comment field.
In some cases, the appearance of a comment in a random place
may break the compilation (e.g. cgo and runtime package).
This is safe because the Comment field cannot contain any directives.
Part of #149.
Many files were missing copyright, so also add a short script to add the
missing lines with the current year, and run it.
The AUTHORS file is also self-explanatory. Contributors can add
themselves there, or we can simply update it from time to time via
git-shortlog.
Since we have two scripts now, set up a directory for them.
Fixes #2.
Line numbers are now obfuscated, via `//line` comments.
Filenames are now obfuscated via `//line` comments, instead of changing the actual filename.
New flag `-tiny` to reduce the binary size, at the cost of reversibility.
Daniel Martí
lu4p
pagran
Andrew LeFevre
pagran