chrome/installer/mac/sign_versioned_dir.sh.in

#!/bin/bash -p

# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Using codesign, sign the contents of the versioned directory. Namely, this
# includes the framework and helper app. After signing, the signatures are
# verified.

set -eu

# Environment sanitization. Set a known-safe PATH. Clear environment variables
# that might impact the interpreter's operation. The |bash -p| invocation
# on the #! line takes the bite out of BASH_ENV, ENV, and SHELLOPTS (among
# other features), but clearing them here ensures that they won't impact any
# shell scripts used as utility programs. SHELLOPTS is read-only and can't be
# unset, only unexported.
export PATH="/usr/bin:/bin:/usr/sbin:/sbin"
unset BASH_ENV CDPATH ENV GLOBIGNORE IFS POSIXLY_CORRECT
export -n SHELLOPTS

ME="$(basename "${0}")"
readonly ME

if [[ ${#} -ne 3 ]]; then
  echo "usage: ${ME} app_path codesign_keychain codesign_id" >& 2
  exit 1
fi

app_path="${1}"
codesign_keychain="${2}"
codesign_id="${3}"

versioned_dir="${app_path}/Contents/Versions/@VERSION@"

# An .app bundle to be signed can be signed directly. Normally, signing a
# framework bundle requires that each version within be signed individually.
# http://developer.apple.com/mac/library/technotes/tn2007/tn2206.html#TNTAG13
# In Chrome's case, the framework bundle is unversioned, so it too can be
# signed directly. See copy_framework_unversioned.sh.

framework="${versioned_dir}/@MAC_PRODUCT_NAME@ Framework.framework"
notification_service="${framework}/XPCServices/AlertNotificationService.xpc"
crashpad_handler="${framework}/Helpers/crashpad_handler"
helper_app="${versioned_dir}/@MAC_PRODUCT_NAME@ Helper.app"
app_mode_loader_app="${framework}/Resources/app_mode_loader.app"
app_mode_loader="${app_mode_loader_app}/Contents/MacOS/app_mode_loader"

requirement_suffix="\
and certificate leaf = H\"85cee8254216185620ddc8851c7a9fc4dfe120ef\"\
"

enforcement_flags="restrict"

codesign --sign "${codesign_id}" --keychain "${codesign_keychain}" \
    "${crashpad_handler}" \
    -r="designated => identifier \"crashpad_handler\" \
${requirement_suffix}" --options "${enforcement_flags}"

# The app mode loader bundle is modified dynamically at runtime. Just sign the
# executable, which shouldn't change. In order to do this, the executable needs
# to be copied out of the bundle, signed, and then copied back in. The resulting
# bundle's signature won't validate normally, but if the executable file is
# verified in isolation or with --ignore-resources, it will. Because the
# bundle's signature won't validate on its own, don't set any of the enforcement
# flags.
app_mode_loader_tmp="$(mktemp -t app_mode_loader)"
cp "${app_mode_loader}" "${app_mode_loader_tmp}"
codesign --sign "${codesign_id}" --keychain "${codesign_keychain}" \
    "${app_mode_loader_tmp}" \
    -r="designated => identifier \"app_mode_loader\" \
${requirement_suffix}"
cp "${app_mode_loader_tmp}" "${app_mode_loader}"
rm -f "${app_mode_loader_tmp}"

codesign --sign "${codesign_id}" --keychain "${codesign_keychain}" \
         "${notification_service}" \
         -r="designated => identifier \"com.google.Chrome.framework.AlertNotificationService\" \
${requirement_suffix}"

codesign --sign "${codesign_id}" --keychain "${codesign_keychain}" \
    "${framework}" \
    -r="designated => identifier \"com.google.Chrome.framework\" \
${requirement_suffix}"

codesign --sign "${codesign_id}" --keychain "${codesign_keychain}" \
    "${helper_app}" \
    -r="designated => identifier \"com.google.Chrome.helper\" \
${requirement_suffix}" --options "${enforcement_flags}"

# Verify everything. Don't use --deep on the framework because Keystone's
# signature is in a transitional state (radar 18474911). Don't verify
# app_mode_loader independently because --ignore-resources is unrecognized
# before 10.11 (bug 565859).
codesign --verify --deep "${crashpad_handler}"
# codesign --verify --ignore-resources "${app_mode_loader}"
codesign --verify --deep "${notification_service}"
codesign --verify "${framework}"
codesign --verify --deep "${helper_app}"