Toggle diff (298 lines)
diff --git a/gnu/local.mk b/gnu/local.mk
index 4643d05049..f97a0cda78 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -111,6 +111,7 @@ GNU_SYSTEM_MODULES = \
%D%/packages/boost.scm \
%D%/packages/bootloaders.scm \
%D%/packages/bootstrap.scm \
+ %D%/packages/browser-extensions.scm \
%D%/packages/build-tools.scm \
%D%/packages/busybox.scm \
%D%/packages/c.scm \
diff --git a/gnu/packages/browser-extensions.scm b/gnu/packages/browser-extensions.scm
new file mode 100644
index 0000000000..b6d160bee7
--- /dev/null
+++ b/gnu/packages/browser-extensions.scm
@@ -0,0 +1,278 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2020 Marius Bakke <marius@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages browser-extensions)
+ #:use-module (gcrypt base16)
+ #:use-module ((gcrypt hash) #:prefix hash:)
+ #:use-module (ice-9 iconv)
+ #:use-module (guix gexp)
+ #:use-module (guix packages)
+ #:use-module (gnu packages base)
+ #:use-module (gnu packages check)
+ #:use-module (gnu packages chromium)
+ #:use-module (gnu packages gnupg)
+ #:use-module (gnu packages tls)
+ #:use-module (gnu packages xorg)
+ #:use-module (guix build-system trivial)
+
+ ;; Imports for extension packages.
+ #:use-module (guix git-download)
+ #:use-module (guix build-system gnu)
+ #:use-module ((guix licenses) #:prefix license:)
+ #:use-module (gnu packages compression)
+ #:use-module (gnu packages python)
+
+ #:export (make-chromium-extension))
+
+;; Chromium requires that each package is signed with a unique key, from which
+;; the "extension ID" derives. Currently the package name is used as seed.
+(define (make-signing-key seed)
+ "Return a derivation for a deterministic PKCS #8 private key using SEED."
+
+ (define sha256sum
+ (bytevector->base16-string (hash:sha256 (string->bytevector seed "UTF-8"))))
+
+ ;; certtool.c wants a 56 byte seed for a 2048 bit key.
+ (define size 2048)
+ (define normalized-seed (string-take sha256sum 56))
+
+ (computed-file (string-append seed "-signing-key.pem")
+ #~(system* #$(file-append gnutls "/bin/certtool")
+ "--generate-privkey"
+ "--key-type=rsa"
+ "--pkcs8"
+ ;; Use the provable FIPS-PUB186-4 algorithm for
+ ;; deterministic results.
+ "--provable"
+ "--password="
+ "--no-text"
+ (string-append "--bits=" #$(number->string size))
+ (string-append "--seed=" #$normalized-seed)
+ "--outfile" #$output)))
+
+(define* (make-crx package #:optional (chromium-output "out"))
+ ;; XXX: This is terrible. We pull Xorg and Chromium just to pack and
+ ;; sign an extension. This should be implemented with something lighter
+ ;; using the protobuf-based protocol (TODO: where is it documented..?).
+ (define name (package-name package))
+ (define version (package-version package))
+ (define signing-key (make-signing-key name))
+
+ (with-imported-modules '((guix build utils))
+ (computed-file
+ (string-append name "-" version ".crx")
+ #~(begin
+ (use-modules (guix build utils)
+ (ice-9 ftw)
+ (srfi srfi-26))
+ (let ((chromium #$(file-append ungoogled-chromium "/bin/chromium"))
+ (xvfb #$(file-append xorg-server "/bin/Xvfb"))
+ (packdir (string-append "/tmp/extension/" #$name)))
+ (mkdir-p (dirname packdir))
+ (copy-recursively (ungexp package chromium-output) packdir)
+ (system (string-append xvfb " :1 &"))
+ (setenv "DISPLAY" ":1")
+ (sleep 2) ;give Xorg some time to initialize...
+ ;; Chromium stores the current time in the .crx Zip archive.
+ ;; Sidestep that by using "faketime" for determinism.
+ ;; FIXME (core-updates): faketime is missing an absolute reference
+ ;; to 'date', hence the need to set PATH.
+ (setenv "PATH" #$(file-append coreutils "/bin"))
+ (invoke #$(file-append libfaketime "/bin/faketime")
+ "2000-01-01 00:00:00"
+ chromium
+ "--user-data-dir=/tmp/signing-profile"
+ (string-append "--pack-extension=" packdir)
+ (string-append "--pack-extension-key=" #$signing-key))
+ (copy-file (string-append packdir ".crx") #$output))))))
+
+(define* (package->chromium-json package #:optional (chromium-output "out"))
+ "Return a derivation that creates a JSON file for PACKAGE, meant to be
+consumed by Chromium to make the installed extension visible."
+
+ (define name (package-name package))
+ (define version (package-version package))
+ (define crx (make-crx package chromium-output))
+
+ (computed-file (string-append name "-" version ".json")
+ #~(call-with-output-file #$output
+ (lambda (port)
+ ;; Documentation for the JSON format can be found in
+ ;; extensions/common/extension.h and
+ ;; chrome/browser/extensions/external_provider_impl.cc.
+ (format port "
+{
+ \"external_crx\": \"~a\",
+ \"external_version\": \"~a\"
+}
+"
+ #$crx #$version)))))
+
+
+(define (key->der key)
+ "Return a derivation for a file representation of KEY in DER format."
+ (computed-file "der"
+ #~(system* #$(file-append gnutls "/bin/certtool")
+ "--load-privkey" #$key
+ "--pubkey-info"
+ "--outfile" #$output
+ "--outder")))
+
+(define (gexp-sha256sum file)
+ "Return a derivation for a base16 representation of the SHA256 checksum
+of FILE."
+ (with-extensions (list guile-gcrypt)
+ #~(begin
+ (use-modules (gcrypt base16) (gcrypt hash))
+ (format #f (bytevector->base16-string (file-sha256 #$file))))))
+
+(define (chromium-json->profile-object json signing-key)
+ "Return a derivation that installs JSON to the destination searched by
+Chromium, using a file name (aka extension ID) derived from SIGNING-KEY."
+ (define der (key->der signing-key))
+ (define checksum (gexp-sha256sum der))
+
+ (with-imported-modules '((guix build utils))
+ (computed-file
+ "chromium-extension"
+ #~(begin
+ (use-modules (guix build utils))
+ (define (base16-string->chromium-base16 str)
+ ;; Translate STR, a hexadecimal string, to a Chromium-style
+ ;; representation using the letters a-p (where a=0, p=15).
+ (define s1 "0123456789abcdef")
+ (define s2 "abcdefghijklmnop")
+ (let loop ((chars (string->list str))
+ (converted '()))
+ (if (null? chars)
+ (list->string (reverse converted))
+ (loop (cdr chars) (cons (string-ref
+ s2 (string-index s1 (car chars)))
+ converted)))))
+
+ (let ((file-name (base16-string->chromium-base16
+ (string-take #$checksum 32)))
+ (extension-directory (string-append #$output
+ "/share/chromium/extensions")))
+ (mkdir-p extension-directory)
+ (symlink #$json (string-append extension-directory "/"
+ file-name ".json")))))))
+
+(define* (make-chromium-extension p #:optional (output "out"))
+ "Create a signed \".crx\" file from package P, an unpacked Chromium
+extension, and return a derivation for a package that makes the packed
+extension visible to Chromium when installed to a Guix profile.
+
+OUTPUT can be used to specify which output of P contains the Chromium
+extension directory."
+ (package
+ (inherit p)
+ (name (string-append (package-name p) "-chromium"))
+ (build-system trivial-build-system)
+ (native-inputs '())
+ (inputs
+ `(("extension" ,(chromium-json->profile-object
+ (package->chromium-json p output)
+ (make-signing-key (package-name p))))))
+ (propagated-inputs '())
+ (outputs '("out"))
+ (arguments
+ '(#:modules ((guix build utils))
+ #:builder
+ (begin
+ (use-modules (guix build utils))
+ (copy-recursively (assoc-ref %build-inputs "extension")
+ (assoc-ref %outputs "out")))))))
+
+
+
+(define uassets
+ (let ((commit "95d609786680bf4cf267b1dff3f429af88040da1"))
+ (origin
+ (method git-fetch)
+ (uri (git-reference
+ (url "https://github.com/uBlockOrigin/uAssets.git")
+ (commit commit)))
+ (file-name (git-file-name "uAssets" (string-take commit 9)))
+ (sha256
+ (base32
+ "070v2g0hyxvqv77b6z404hdlggl0sq2bfhsfl4a84k93p9pwwlrq")))))
+
+(define ublock-origin
+ (package
+ (name "ublock-origin")
+ (version "1.30.8")
+ (home-page "https://github.com/gorhill/uBlock")
+ (source (origin
+ (method git-fetch)
+ (uri (git-reference (url home-page) (commit version)))
+ (file-name (git-file-name name version))
+ (sha256
+ (base32
+ "1y4dq4p4j4qrw6gfdcbpyigqjinqq3jm8r5x9h5ariiv9s8856w7"))))
+ (build-system gnu-build-system)
+ ;; XXX: The xpi and firefox outputs are currently unused, but included
+ ;; for easy testing.
+ (outputs '("xpi" "firefox" "chromium"))
+ (arguments
+ '(#:tests? #f ;no tests
+ #:allowed-references ()
+ #:phases
+ (modify-phases (map (lambda (phase)
+ (assq phase %standard-phases))
+ '(set-paths unpack patch-source-shebangs))
+ (add-after 'unpack 'link-uassets
+ (lambda* (#:key native-inputs inputs #:allow-other-keys)
+ (symlink (string-append (assoc-ref (or native-inputs inputs)
+ "uassets"))
+ "../uAssets")
+ #t))
+ (add-after 'unpack 'make-files-writable
+ (lambda _
+ ;; The build system copies some files and later tries
+ ;; modifying them.
+ (for-each make-file-writable (find-files "."))
+ #true))
+ (add-after 'patch-source-shebangs 'build-xpi
+ (lambda _
+ (invoke "./tools/make-firefox.sh" "all")))
+ (add-after 'build-xpi 'build-chromium
+ (lambda _
+ (invoke "./tools/make-chromium.sh")))
+ (add-after 'build-chromium 'install
+ (lambda* (#:key outputs #:allow-other-keys)
+ (let ((firefox (assoc-ref outputs "firefox"))
+ (xpi (assoc-ref outputs "xpi"))
+ (chromium (assoc-ref outputs "chromium")))
+ (install-file "dist/build/uBlock0.firefox.xpi"
+ (string-append xpi "/lib/mozilla/extensions"))
+ (copy-recursively "dist/build/uBlock0.firefox" firefox)
+ (copy-recursively "dist/build/uBlock0.chromium" chromium)
+ #true))))))
+ (native-inputs
+ `(("python" ,python-wrapper)
+ ("uassets" ,uassets)
+ ("zip" ,zip)))
+ (synopsis "Block unwanted content from web sites")
+ (description
+ "uBlock Origin is a @dfn{wide spectrum blocker} for IceCat and
+ungoogled-chromium.")
+ (license license:gpl3+)))
+
+(define-public ublock-origin/chromium
+ (make-chromium-extension ublock-origin "chromium"))
--
2.28.0
