commit e9c42862544aeb284980074701e5a12107be8fcb Author: Kathy Brade brade@pearlcrescent.com Date: Wed Dec 17 16:37:11 2014 -0500

Bug 13379: Sign our MAR files.

Configure with --enable-verify-mar (when updating, require a valid signature on the MAR file before it is applied). Use the Tor Browser version instead of the Firefox version inside the MAR file info block (necessary to prevent downgrade attacks). Use NSS on all platforms for checking MAR signatures (instead of using OS-native APIs, which Mozilla does on Mac OS and Windows). So that the NSS and NSPR libraries the updater depends on can be found at runtime, we add the firefox directory to the shared library search path on macOS. On Linux, rpath is used by Mozilla to solve that problem, but that approach won't work on macOS because the updater executable is copied during the update process to a location that is under TorBrowser-Data, and the location of TorBrowser-Data varies.

Also includes the fix for bug 18900. --- .mozconfig | 1 + .mozconfig-asan | 1 + .mozconfig-mac | 1 + .mozconfig-mingw | 1 + modules/libmar/tool/mar.c | 6 +-- modules/libmar/tool/moz.build | 12 ++++-- modules/libmar/verify/moz.build | 14 +++--- .../mozapps/update/updater/updater-common.build | 26 +++++++++-- toolkit/mozapps/update/updater/updater.cpp | 25 +++++++---- toolkit/xre/moz.build | 3 ++ toolkit/xre/nsUpdateDriver.cpp | 50 ++++++++++++++++++++++ 11 files changed, 115 insertions(+), 25 deletions(-)

diff --git a/.mozconfig b/.mozconfig index 18cd1f9b6487..c50c57d410de 100755 --- a/.mozconfig +++ b/.mozconfig @@ -37,3 +37,4 @@ ac_add_options MOZ_TELEMETRY_REPORTING= ac_add_options --disable-tor-launcher ac_add_options --with-tor-browser-version=dev-build ac_add_options --disable-tor-browser-update +ac_add_options --enable-verify-mar diff --git a/.mozconfig-asan b/.mozconfig-asan index bad7ea022c9f..e42ff6c86bc5 100644 --- a/.mozconfig-asan +++ b/.mozconfig-asan @@ -29,6 +29,7 @@ ac_add_options --enable-official-branding ac_add_options --enable-default-toolkit=cairo-gtk3

ac_add_options --enable-tor-browser-update +ac_add_options --enable-verify-mar

ac_add_options --disable-strip ac_add_options --disable-install-strip diff --git a/.mozconfig-mac b/.mozconfig-mac index 26e2b6b92fdb..5b4624ef1f67 100644 --- a/.mozconfig-mac +++ b/.mozconfig-mac @@ -43,6 +43,7 @@ ac_add_options --disable-debug

ac_add_options --enable-tor-browser-data-outside-app-dir ac_add_options --enable-tor-browser-update +ac_add_options --enable-verify-mar

ac_add_options --disable-crashreporter ac_add_options --disable-webrtc diff --git a/.mozconfig-mingw b/.mozconfig-mingw index 3ec6ff18a3e9..ce6ace1dad67 100644 --- a/.mozconfig-mingw +++ b/.mozconfig-mingw @@ -15,6 +15,7 @@ ac_add_options --enable-strip ac_add_options --enable-official-branding

ac_add_options --enable-tor-browser-update +ac_add_options --enable-verify-mar ac_add_options --disable-bits-download

# Let's make sure no preference is enabling either Adobe's or Google's CDM. diff --git a/modules/libmar/tool/mar.c b/modules/libmar/tool/mar.c index 0bf2cb4bd1d4..ea2b79924914 100644 --- a/modules/libmar/tool/mar.c +++ b/modules/libmar/tool/mar.c @@ -65,7 +65,7 @@ static void print_usage() { "signed_input_archive.mar base_64_encoded_signature_file " "changed_signed_output.mar\n"); printf("(i) is the index of the certificate to extract\n"); -# if defined(XP_MACOSX) || (defined(XP_WIN) && !defined(MAR_NSS)) +# if (defined(XP_MACOSX) || defined(XP_WIN)) && !defined(MAR_NSS) printf("Verify a MAR file:\n"); printf(" mar [-C workingDir] -D DERFilePath -v signed_archive.mar\n"); printf( @@ -149,7 +149,7 @@ int main(int argc, char** argv) { memset((void*)certBuffers, 0, sizeof(certBuffers)); #endif #if !defined(NO_SIGN_VERIFY) && \ - ((!defined(MAR_NSS) && defined(XP_WIN)) || defined(XP_MACOSX)) + (!defined(MAR_NSS) && (defined(XP_WIN) || defined(XP_MACOSX))) memset(DERFilePaths, 0, sizeof(DERFilePaths)); memset(fileSizes, 0, sizeof(fileSizes)); #endif @@ -181,7 +181,7 @@ int main(int argc, char** argv) { argc -= 2; } #if !defined(NO_SIGN_VERIFY) -# if (!defined(MAR_NSS) && defined(XP_WIN)) || defined(XP_MACOSX) +# if (!defined(MAR_NSS) && (defined(XP_WIN) || defined(XP_MACOSX))) /* -D DERFilePath, also matches -D[index] DERFilePath We allow an index for verifying to be symmetric with the import and export command line arguments. */ diff --git a/modules/libmar/tool/moz.build b/modules/libmar/tool/moz.build index a6d26c66a668..d6fa1677ddf1 100644 --- a/modules/libmar/tool/moz.build +++ b/modules/libmar/tool/moz.build @@ -43,15 +43,21 @@ if CONFIG["MOZ_BUILD_APP"] != "tools/update-packaging": "verifymar", ]

+ if CONFIG["TOR_BROWSER_UPDATE"]: + DEFINES["MAR_NSS"] = True + if CONFIG["OS_ARCH"] == "WINNT": USE_STATIC_LIBS = True

OS_LIBS += [ "ws2_32", - "crypt32", - "advapi32", ] - elif CONFIG["OS_ARCH"] == "Darwin": + if not CONFIG["TOR_BROWSER_UPDATE"]: + OS_LIBS += [ + "crypt32", + "advapi32", + ] + elif CONFIG["OS_ARCH"] == "Darwin" and not CONFIG["TOR_BROWSER_UPDATE"]: OS_LIBS += [ "-framework Security", ] diff --git a/modules/libmar/verify/moz.build b/modules/libmar/verify/moz.build index b07475655f0d..03718eee50b4 100644 --- a/modules/libmar/verify/moz.build +++ b/modules/libmar/verify/moz.build @@ -16,15 +16,12 @@ FORCE_STATIC_LIB = True if CONFIG["OS_ARCH"] == "WINNT": USE_STATIC_LIBS = True elif CONFIG["OS_ARCH"] == "Darwin": - UNIFIED_SOURCES += [ - "MacVerifyCrypto.cpp", - ] - OS_LIBS += [ - "-framework Security", + USE_LIBS += [ + "nspr", + "nss", + "signmar", ] else: - DEFINES["MAR_NSS"] = True - LOCAL_INCLUDES += ["../sign"] USE_LIBS += [ "nspr", "nss", @@ -38,6 +35,9 @@ else: "-Wl,-rpath=\$$ORIGIN", ]

+DEFINES["MAR_NSS"] = True +LOCAL_INCLUDES += ["../sign"] + LOCAL_INCLUDES += [ "../src", ] diff --git a/toolkit/mozapps/update/updater/updater-common.build b/toolkit/mozapps/update/updater/updater-common.build index 2f2a210f255b..74b24151757f 100644 --- a/toolkit/mozapps/update/updater/updater-common.build +++ b/toolkit/mozapps/update/updater/updater-common.build @@ -4,6 +4,12 @@ # License, v. 2.0. If a copy of the MPL was not distributed with this # file, You can obtain one at http://mozilla.org/MPL/2.0/.

+DEFINES["MAR_NSS"] = True + +link_with_nss = DEFINES["MAR_NSS"] or ( + CONFIG["OS_ARCH"] == "Linux" and CONFIG["MOZ_VERIFY_MAR_SIGNATURE"] +) + srcs = [ "archivereader.cpp", "updater.cpp", @@ -36,10 +42,14 @@ if CONFIG["OS_ARCH"] == "WINNT": "ws2_32", "shell32", "shlwapi", - "crypt32", - "advapi32", ]

+ if not link_with_nss: + OS_LIBS += [ + "crypt32", + "advapi32", + ] + USE_LIBS += [ "bspatch", "mar", @@ -47,6 +57,13 @@ USE_LIBS += [ "xz-embedded", ]

+if link_with_nss: + USE_LIBS += [ + "nspr", + "nss", + "signmar", + ] + if CONFIG["MOZ_WIDGET_TOOLKIT"] == "gtk": have_progressui = 1 srcs += [ @@ -61,9 +78,12 @@ if CONFIG["MOZ_WIDGET_TOOLKIT"] == "cocoa": ] OS_LIBS += [ "-framework Cocoa", - "-framework Security", "-framework SystemConfiguration", ] + if not link_with_nss: + OS_LIBS += [ + "-framework Security", + ] UNIFIED_SOURCES += [ "/toolkit/xre/updaterfileutils_osx.mm", ] diff --git a/toolkit/mozapps/update/updater/updater.cpp b/toolkit/mozapps/update/updater/updater.cpp index 7f2d57393e08..8469a4c6172e 100644 --- a/toolkit/mozapps/update/updater/updater.cpp +++ b/toolkit/mozapps/update/updater/updater.cpp @@ -110,9 +110,11 @@ struct UpdateServerThreadArgs { # define stat64 stat #endif

-#if defined(MOZ_VERIFY_MAR_SIGNATURE) && !defined(XP_WIN) && !defined(XP_MACOSX) -# include "nss.h" -# include "prerror.h" +#if defined(MOZ_VERIFY_MAR_SIGNATURE) +# if defined(MAR_NSS) || (!defined(XP_WIN) && !defined(XP_MACOSX)) +# include "nss.h" +# include "prerror.h" +# endif #endif

#include "crctable.h" @@ -2725,8 +2727,13 @@ static void UpdateThreadFunc(void* param) { if (ReadMARChannelIDs(updateSettingsPath, &MARStrings) != OK) { rv = UPDATE_SETTINGS_FILE_CHANNEL; } else { +# ifdef TOR_BROWSER_UPDATE + const char* appVersion = TOR_BROWSER_VERSION_QUOTED; +# else + const char* appVersion = MOZ_APP_VERSION; +# endif rv = gArchiveReader.VerifyProductInformation( - MARStrings.MARChannelID.get(), MOZ_APP_VERSION); + MARStrings.MARChannelID.get(), appVersion); } } } @@ -2927,11 +2934,10 @@ int NS_main(int argc, NS_tchar** argv) { } #endif

-#if defined(MOZ_VERIFY_MAR_SIGNATURE) && !defined(XP_WIN) && !defined(XP_MACOSX) - // On Windows and Mac we rely on native APIs to do verifications so we don't - // need to initialize NSS at all there. - // Otherwise, minimize the amount of NSS we depend on by avoiding all the NSS - // databases. +#if defined(MOZ_VERIFY_MAR_SIGNATURE) +# if defined(MAR_NSS) || (!defined(XP_WIN) && !defined(XP_MACOSX)) + // If using NSS for signature verification, initialize NSS but minimize + // the portion we depend on by avoiding all of the NSS databases. if (NSS_NoDB_Init(nullptr) != SECSuccess) { PRErrorCode error = PR_GetError(); fprintf(stderr, "Could not initialize NSS: %s (%d)", PR_ErrorToName(error), @@ -2939,6 +2945,7 @@ int NS_main(int argc, NS_tchar** argv) { _exit(1); } #endif +#endif

#ifdef XP_MACOSX if (!isElevated) { diff --git a/toolkit/xre/moz.build b/toolkit/xre/moz.build index cf5f7ac50093..f9fe777d8e20 100644 --- a/toolkit/xre/moz.build +++ b/toolkit/xre/moz.build @@ -232,6 +232,9 @@ for var in ("APP_VERSION", "APP_ID"): if CONFIG["MOZ_BUILD_APP"] == "browser": DEFINES["MOZ_BUILD_APP_IS_BROWSER"] = True

+if CONFIG["TOR_BROWSER_UPDATE"]: + DEFINES["MAR_NSS"] = True + LOCAL_INCLUDES += [ "../../other-licenses/nsis/Contrib/CityHash/cityhash", "../components/find", diff --git a/toolkit/xre/nsUpdateDriver.cpp b/toolkit/xre/nsUpdateDriver.cpp index 4a4ad10a0aa5..a0a9f6ba93c7 100644 --- a/toolkit/xre/nsUpdateDriver.cpp +++ b/toolkit/xre/nsUpdateDriver.cpp @@ -364,6 +364,42 @@ static nsresult GetUpdateDirFromAppDir(nsIFile* aAppDir, nsIFile** aResult) { # endif #endif

+#if defined(TOR_BROWSER_UPDATE) && defined(MOZ_VERIFY_MAR_SIGNATURE) && \ + defined(MAR_NSS) && defined(XP_MACOSX) +/** + * Ideally we would save and restore the original library path value after + * the updater finishes its work (and before firefox is re-launched). + * Doing so would avoid potential problems like the following bug: + * https://bugzilla.mozilla.org/show_bug.cgi?id=1434033 + */ +/** + * Appends the specified path to the library path. + * This is used so that the updater can find libnss3.dylib and other + * shared libs. + * + * @param pathToAppend A new library path to prepend to the dynamic linker's + * search path. + */ +# include "prprf.h" +# define PATH_SEPARATOR ":" +# define LD_LIBRARY_PATH_ENVVAR_NAME "DYLD_LIBRARY_PATH" +static void AppendToLibPath(const char* pathToAppend) { + char* pathValue = getenv(LD_LIBRARY_PATH_ENVVAR_NAME); + if (nullptr == pathValue || '\0' == *pathValue) { + // Leak the string because that is required by PR_SetEnv. + char* s = + Smprintf("%s=%s", LD_LIBRARY_PATH_ENVVAR_NAME, pathToAppend).release(); + PR_SetEnv(s); + } else { + // Leak the string because that is required by PR_SetEnv. + char* s = Smprintf("%s=%s" PATH_SEPARATOR "%s", LD_LIBRARY_PATH_ENVVAR_NAME, + pathToAppend, pathValue) + .release(); + PR_SetEnv(s); + } +} +#endif + /** * Applies, switches, or stages an update. * @@ -610,6 +646,20 @@ static void ApplyUpdate(nsIFile* greDir, nsIFile* updateDir, nsIFile* appDir, PR_SetEnv("MOZ_SAFE_MODE_RESTART=1"); }

+#if defined(TOR_BROWSER_UPDATE) && defined(MOZ_VERIFY_MAR_SIGNATURE) && \ + defined(MAR_NSS) && defined(XP_MACOSX) + // On macOS, append the app directory to the shared library search path + // so the system can locate the shared libraries that are needed by the + // updater, e.g., libnss3.dylib). + nsAutoCString appPath; + nsresult rv2 = appDir->GetNativePath(appPath); + if (NS_SUCCEEDED(rv2)) { + AppendToLibPath(appPath.get()); + } else { + LOG(("ApplyUpdate -- appDir->GetNativePath() failed (0x%x)\n", rv2)); + } +#endif + LOG(("spawning updater process [%s]\n", updaterPath.get())); #ifdef DEBUG dump_argv("ApplyUpdate updater", argv, argc);