tor-commits December 2016

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[tor-browser/tor-browser-45.5.1esr-6.5-1] fixup! TB4: Tor Browser's Firefox preference overrides.
by gk＠torproject.org 05 Dec '16

05 Dec '16

commit a80e28aed0db10bcbbb604644eef9ccae3939e7f Author: Arthur Edelstein <arthuredelstein(a)gmail.com> Date: Mon Nov 14 10:46:45 2016 -0800 fixup! TB4: Tor Browser's Firefox preference overrides. --- browser/app/profile/000-tor-browser.js | 1 + 1 file changed, 1 insertion(+) diff --git a/browser/app/profile/000-tor-browser.js b/browser/app/profile/000-tor-browser.js index 1f1db9e..a5b6aa9 100644 --- a/browser/app/profile/000-tor-browser.js +++ b/browser/app/profile/000-tor-browser.js @@ -147,6 +147,7 @@ pref("ui.use_standins_for_native_colors", true); // https://bugzilla.mozilla.org // bug 18950 for more details. pref("browser.reader.detectedFirstArticle", true); pref("reader.parse-on-load.enabled", false); +pref("privacy.use_utc_timezone", true); // Third party stuff pref("network.cookie.cookieBehavior", 1);

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[sandboxed-tor-browser/master] Switch to pre-compiling the seccomp BPF filters at compile time.
by yawning＠torproject.org 05 Dec '16

05 Dec '16

commit 7d5a4c04a1df365bef19c9dfedd0713d3d0cd5b0 Author: Yawning Angel <yawning(a)schwanenlied.me> Date: Mon Dec 5 01:13:06 2016 +0000 Switch to pre-compiling the seccomp BPF filters at compile time. libseccomp2 didn't get a wau to enumerate library version at runtime till farily recently, and Debian stable ships something older than the minimum required version. As long as the box that builds the binary has new enough libseccomp, this will do the Right Thing(TM). --- .gitignore | 1 + Makefile | 10 +- README.md | 2 +- src/cmd/gen-seccomp/main.go | 90 ++++ src/cmd/gen-seccomp/seccomp.go | 128 +++++ src/cmd/gen-seccomp/seccomp_firefox.go | 249 ++++++++++ src/cmd/gen-seccomp/seccomp_tor.go | 535 ++++++++++++++++++++ .../internal/sandbox/seccomp.go | 113 +---- .../internal/sandbox/seccomp_firefox.go | 250 ---------- .../internal/sandbox/seccomp_tor.go | 536 --------------------- 10 files changed, 1026 insertions(+), 888 deletions(-) diff --git a/.gitignore b/.gitignore index 1bd17ca..8fc2492 100644 --- a/.gitignore +++ b/.gitignore @@ -1,6 +1,7 @@ bin/ pkg/ data/tbb_stub.so +data/*.bpf src/cmd/sandboxed-tor-browser/internal/data/bindata.go *.swp *~ diff --git a/Makefile b/Makefile index d50ed55..edbfa4c 100644 --- a/Makefile +++ b/Makefile @@ -6,10 +6,11 @@ GTK3TAG := gtk_3_14 all: sandboxed-tor-browser sandboxed-tor-browser: static-assets - gb build -tags $(GTK3TAG) + gb build -tags $(GTK3TAG) cmd/sandboxed-tor-browser mv ./bin/sandboxed-tor-browser-$(GTK3TAG) ./bin/sandboxed-tor-browser -static-assets: go-bindata tbb_stub +static-assets: go-bindata gen-seccomp tbb_stub + ./bin/gen-seccomp -o ./data ./bin/go-bindata -nometadata -pkg data -prefix data -o ./src/cmd/sandboxed-tor-browser/internal/data/bindata.go data/... tbb_stub: go-bindata @@ -17,10 +18,13 @@ tbb_stub: go-bindata go-bindata: gb build github.com/jteeuwen/go-bindata/go-bindata - mkdir -p data + +gen-seccomp: + gb build cmd/gen-seccomp clean: rm -f ./src/cmd/sandboxed-tor-browser/internal/data/bindata.go rm -f ./data/tbb_stub.so + rm -f ./data/*.bpf rm -Rf ./bin rm -Rf ./pkg diff --git a/README.md b/README.md index 82e4ac6..18e26f9 100644 --- a/README.md +++ b/README.md @@ -18,7 +18,6 @@ Runtime dependencies: * A modern Linux system on x86/x86_64 architecture. * bubblewrap >= 0.1.3 (https://github.com/projectatomic/bubblewrap). - * libseccomp2 >= 2.2.1 * Gtk+ >= 3.14.0 * (Optional) PulseAudio @@ -28,6 +27,7 @@ Build time dependencies: * A C compiler * gb (https://getgb.io/ Yes I know it's behind fucking cloudflare) * Go (Tested with 1.7.x) + * libseccomp2 >= 2.2.1 Things that the sandbox breaks: diff --git a/src/cmd/gen-seccomp/main.go b/src/cmd/gen-seccomp/main.go new file mode 100644 index 0000000..3ad1be5 --- /dev/null +++ b/src/cmd/gen-seccomp/main.go @@ -0,0 +1,90 @@ +// gen-seccomp.go - Pre-generate seccomp rules. +// Copyright (C) 2016 Yawning Angel. +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as +// published by the Free Software Foundation, either version 3 of the +// License, or (at your option) any later version. +// +// This program 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 Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see <http://www.gnu.org/licenses/>. + +package main + +import ( + "flag" + "log" + "os" + "path/filepath" +) + +func main() { + outFlag := flag.String("o", "", "output directory") + flag.Parse() + + outDir, err := filepath.Abs(*outFlag) + if err != nil { + log.Fatalf("failed to get absolute path: %v", err) + } + + log.Printf("outDir: %v", outDir) + + // Tor Browser (amd64) + f, err := os.Create(filepath.Join(outDir, "tor-amd64.bpf")) + if err != nil { + log.Fatalf("failed to create output: %v", err) + } + if err = compileTorSeccompProfile(f, false, false); err != nil { + log.Fatalf("failed to create tor amd64 profile: %v", err) + } + + // Tor Browser + obfs4proxy (amd64) + f, err = os.Create(filepath.Join(outDir, "tor-obfs4-amd64.bpf")) + if err != nil { + log.Fatalf("failed to create output: %v", err) + } + if err = compileTorSeccompProfile(f, true, false); err != nil { + log.Fatalf("failed to create tor-obfs4 amd64 profile: %v", err) + } + + // Firefox (amd64) + f, err = os.Create(filepath.Join(outDir, "torbrowser-amd64.bpf")) + if err != nil { + log.Fatalf("failed to create output: %v", err) + } + if err = compileTorBrowserSeccompProfile(f, false); err != nil { + log.Fatalf("failed to create firefox amd64 profile: %v", err) + } + + // Tor Browser (386) + f, err = os.Create(filepath.Join(outDir, "tor-386.bpf")) + if err != nil { + log.Fatalf("failed to create output: %v", err) + } + if err = compileTorSeccompProfile(f, false, true); err != nil { + log.Fatalf("failed to create tor 386 profile: %v", err) + } + + // Tor Browser + obfs4proxy (386) + f, err = os.Create(filepath.Join(outDir, "tor-obfs4-386.bpf")) + if err != nil { + log.Fatalf("failed to create output: %v", err) + } + if err = compileTorSeccompProfile(f, true, true); err != nil { + log.Fatalf("failed to create tor-obfs4 386 profile: %v", err) + } + + // Firefox (386) + f, err = os.Create(filepath.Join(outDir, "torbrowser-386.bpf")) + if err != nil { + log.Fatalf("failed to create output: %v", err) + } + if err = compileTorBrowserSeccompProfile(f, true); err != nil { + log.Fatalf("failed to create firefox 386 profile: %v", err) + } +} diff --git a/src/cmd/gen-seccomp/seccomp.go b/src/cmd/gen-seccomp/seccomp.go new file mode 100644 index 0000000..6c7366f --- /dev/null +++ b/src/cmd/gen-seccomp/seccomp.go @@ -0,0 +1,128 @@ +// secomp.go - Sandbox seccomp rules. +// Copyright (C) 2016 Yawning Angel. +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as +// published by the Free Software Foundation, either version 3 of the +// License, or (at your option) any later version. +// +// This program 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 Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see <http://www.gnu.org/licenses/>. + +package main + +import ( + "log" + + seccomp "github.com/seccomp/libseccomp-golang" +) + +const ( + madvNormal = 0 // MADV_NORMAL + madvDontneed = 4 // MADV_DONTNEED + madvFree = 8 // MADV_FREE + mremapMaymove = 1 + + sigBlock = 1 // SIG_BLOCK + sigSetmask = 2 // SIG_SETMASK + + futexWait = 0 + futexWake = 1 + futexFd = 2 + futexRequeue = 3 + futexCmpRequeue = 4 + futexWakeOp = 5 + futexLockPi = 6 + futexUnlockPi = 7 + futexTrylockPi = 8 + futexWaitBitset = 9 + futexWakeBitset = 10 + futexWaitRequeuePi = 11 + futexCmpRequeuePi = 12 + + futexPrivateFlag = 128 + futexClockRealtime = 256 + + futexWaitPrivate = futexWait | futexPrivateFlag + futexWakePrivate = futexWake | futexPrivateFlag + futexRequeuePrivate = futexRequeue | futexPrivateFlag + futexCmpRequeuePrivate = futexCmpRequeue | futexPrivateFlag + futexWakeOpPrivate = futexWakeOp | futexPrivateFlag + futexLockPiPrivate = futexLockPi | futexPrivateFlag + futexUnlockPiPrivate = futexUnlockPi | futexPrivateFlag + futexTrylockPiPrivate = futexTrylockPi | futexPrivateFlag + futexWaitBitsetPrivate = futexWaitBitset | futexPrivateFlag + futexWakeBitsetPrivate = futexWakeBitset | futexPrivateFlag + futexWaitRequeuePiPrivate = futexWaitRequeuePi | futexPrivateFlag + futexCmpRequeuePiPrivate = futexCmpRequeuePi | futexPrivateFlag + + pollIn = 1 + + fionread = 0x541b + tcgets = 0x5401 + tiocgpgrp = 0x540f +) + +func newWhitelist(is386 bool) (*seccomp.ScmpFilter, error) { + arch := seccomp.ArchAMD64 + if is386 { + arch = seccomp.ArchX86 + } + + actENOSYS := seccomp.ActErrno.SetReturnCode(38) + f, err := seccomp.NewFilter(actENOSYS) + if err != nil { + return nil, err + } + + if err = f.AddArch(arch); err != nil { + f.Release() + return nil, err + } + + return f, nil +} + +func allowSyscalls(f *seccomp.ScmpFilter, calls []string, is386 bool) error { + for _, scallName := range calls { + scall, err := seccomp.GetSyscallFromName(scallName) + if err != nil { + if is386 && scallName == "newselect" { + scall = seccomp.ScmpSyscall(142) + } else { + log.Printf("seccomp: unknown system call: %v", scallName) + continue + } + } + if err = f.AddRule(scall, seccomp.ActAllow); err != nil { + return err + } + } + return nil +} + +func allowCmpEq(f *seccomp.ScmpFilter, scallName string, arg uint, values ...uint64) error { + scall, err := seccomp.GetSyscallFromName(scallName) + if err != nil { + log.Printf("seccomp: unknown system call: %v", scallName) + return nil + } + + // Allow if the arg matches any of the values. Implemented as multiple + // rules. + for _, v := range values { + argIsEqual, err := seccomp.MakeCondition(arg, seccomp.CompareEqual, v) + if err != nil { + return err + } + if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{argIsEqual}); err != nil { + return err + } + } + return nil +} diff --git a/src/cmd/gen-seccomp/seccomp_firefox.go b/src/cmd/gen-seccomp/seccomp_firefox.go new file mode 100644 index 0000000..465d8fe --- /dev/null +++ b/src/cmd/gen-seccomp/seccomp_firefox.go @@ -0,0 +1,249 @@ +// secomp_firefox.go - Firefox sandbox seccomp rules. +// Copyright (C) 2016 Yawning Angel. +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as +// published by the Free Software Foundation, either version 3 of the +// License, or (at your option) any later version. +// +// This program 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 Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see <http://www.gnu.org/licenses/>. + +package main + +import ( + "os" + "syscall" +) + +func compileTorBrowserSeccompProfile(fd *os.File, is386 bool) error { + defer fd.Close() + + f, err := newWhitelist(is386) + if err != nil { + return err + } + defer f.Release() + + allowedNoArgs := []string{ + "clock_gettime", + "clock_getres", + "gettimeofday", + "nanosleep", + "sched_yield", + + "open", + "openat", + "pread64", + "read", + "recvfrom", + "pwrite64", + "sendto", + "write", + "writev", + "close", + + "access", + "creat", + "chmod", + "chdir", + "dup2", + "dup", + "fadvise64", + "fallocate", + "fcntl", + "fchmod", + "fchown", + "fchdir", + "fdatasync", + "fstat", + "fstatfs", + "ftruncate", + "fsync", + "getcwd", + "getdents", + "getdents64", + "link", + "lseek", + "lstat", + "mkdir", + "name_to_handle_at", + "newfstatat", + "pipe", + "pipe2", + "readahead", + "readlink", + "readlinkat", + "rename", + "rmdir", + "stat", + "splice", + "statfs", + "symlink", + "unlink", + "utime", + "utimes", + + "accept4", + "bind", + "connect", + "epoll_create", + "epoll_create1", + "epoll_ctl", + "epoll_wait", + "eventfd2", + "getsockname", + "getsockopt", + "getpeername", + "listen", + "poll", + "ppoll", + "recvmsg", + "socketpair", + "select", + "sendmsg", + "setsockopt", + "shutdown", + + "inotify_add_watch", + "inotify_init1", + "inotify_rm_watch", + + "brk", + "mincore", + "mmap", + "mlock", + "mprotect", + "mremap", + "munmap", + + // XXX: Remove these? + "shmdt", + "shmat", + "shmctl", + "shmget", + + "alarm", + "execve", + "getrandom", + "getrlimit", + "getrusage", + "getpgrp", + "getppid", + "getpid", + "getpriority", + "getresgid", + "getresuid", + "gettid", + "getuid", + "geteuid", + "getgid", + "getegid", + "rt_sigaction", + "rt_sigprocmask", + "rt_sigreturn", + "sigaltstack", + "setrlimit", + + "arch_prctl", + "capset", + "capget", + "clone", + "exit", + "exit_group", + "kill", + "restart_syscall", + "seccomp", + "sched_getaffinity", + "sched_setscheduler", + "setpriority", + "set_robust_list", + "setsid", + "set_tid_address", + "setresuid", + "setresgid", + "sysinfo", + "tgkill", + "umask", + "uname", + "unshare", + "wait4", + + // Firefox uses this, but will take no for an answer. + // "quotactl", + + // Subgraph's profile has these, but that's for Tor Browser Launcher. + // + // "vfork", + // "memfd_create", (PulseAudio? Won't work in our container.) + // "personality", + } + if is386 { + allowedNoArgs386 := []string{ + "fadvise64_64", + "fcntl64", + "fstat64", + "fstatfs64", + "ftruncate64", + "lstat64", + "stat64", + "statfs64", + "_llseek", + + "mmap2", + "prlimit64", + "ugetrlimit", + "set_thread_area", + "waitpid", + + "getgid32", + "getuid32", + "getresgid32", + "getresuid32", + + "recv", + "send", + "newselect", + "socketcall", + + "socket", // Filtered on amd64. + } + allowedNoArgs = append(allowedNoArgs, allowedNoArgs386...) + } + if err = allowSyscalls(f, allowedNoArgs, is386); err != nil { + return err + } + + // Because we patch PulseAudio's mutex creation, we can omit all PI futex + // calls. + if err = allowCmpEq(f, "futex", 1, futexWait, futexWaitPrivate, futexWakePrivate, futexCmpRequeuePrivate, futexWakeOpPrivate, futexWaitBitsetPrivate|futexClockRealtime, futexWake, futexWaitBitsetPrivate); err != nil { + return err + } + + if err = allowCmpEq(f, "madvise", 2, madvNormal, madvDontneed); err != nil { + return err + } + if err = allowCmpEq(f, "ioctl", 1, fionread, tcgets, tiocgpgrp); err != nil { + return err + } + if err = allowCmpEq(f, "prctl", 0, syscall.PR_SET_NAME, syscall.PR_GET_NAME, syscall.PR_GET_TIMERSLACK, syscall.PR_SET_SECCOMP); err != nil { + return err + } + + if is386 { + if err = allowCmpEq(f, "time", 0, 0); err != nil { + return err + } + } else { + if err = allowCmpEq(f, "socket", 0, syscall.AF_UNIX); err != nil { + return err + } + } + + return f.ExportBPF(fd) +} diff --git a/src/cmd/gen-seccomp/seccomp_tor.go b/src/cmd/gen-seccomp/seccomp_tor.go new file mode 100644 index 0000000..73ed3c0 --- /dev/null +++ b/src/cmd/gen-seccomp/seccomp_tor.go @@ -0,0 +1,535 @@ +// secomp_tor.go - Sandbox tor seccomp rules. +// Copyright (C) 2016 Yawning Angel. +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as +// published by the Free Software Foundation, either version 3 of the +// License, or (at your option) any later version. +// +// This program 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 Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see <http://www.gnu.org/licenses/>. + +package main + +import ( + "os" + "syscall" + + seccomp "github.com/seccomp/libseccomp-golang" +) + +func compileTorSeccompProfile(fd *os.File, useBridges bool, is386 bool) error { + defer fd.Close() + + f, err := newWhitelist(is386) + if err != nil { + return err + } + defer f.Release() + + allowedNoArgs := []string{ + "access", + "brk", + "clock_gettime", + "close", + "clone", + "epoll_create", + "epoll_wait", + "eventfd2", + "pipe2", + "pipe", + "fcntl", + "fstat", + "getdents", + "getdents64", + "getegid", + "geteuid", + "getgid", + "getrlimit", + "gettimeofday", + "gettid", + "getuid", + "lseek", + "mkdir", + "munmap", + "prlimit64", + "read", + "rt_sigreturn", + "sched_getaffinity", + "sched_yield", + "sendmsg", + "set_robust_list", + "setrlimit", + "sigaltstack", + "stat", + "uname", + "wait4", + "write", + "writev", + "exit_group", + "exit", + "getrandom", + "sysinfo", + "bind", + "listen", + "connect", + "getsockname", + "recvmsg", + "recvfrom", + "sendto", + "unlink", + + // XXX: Calls that should be filtered by arg, but aren't yet. + "rt_sigaction", + "accept4", + + // Calls that tor can filter, but I can't due to not being in + // the tor daemon's process space. + "chown", + "chmod", + "open", + "openat", + "rename", + + // Calls made prior to tor's UseSeccomp being installed. + "arch_prctl", + "chdir", + "execve", + "getpid", + "kill", + "restart_syscall", + "set_tid_address", + "unshare", + } + if is386 { + allowedNoArgs386 := []string{ + "fstat64", + "getegid32", + "geteuid32", + "getgid32", + "getuid32", + "_llseek", + "sigreturn", + "fcntl64", // XXX: Filter by arg. + + "recv", + "send", + "stat64", + "socketcall", // Sigh... (see accept4 in the tor code) + + "ugetrlimit", + "set_thread_area", + } + allowedNoArgs = append(allowedNoArgs, allowedNoArgs386...) + } + if err = allowSyscalls(f, allowedNoArgs, is386); err != nil { + return err + } + + if err = allowCmpEq(f, "time", 0, 0); err != nil { + return err + } + if err = allowCmpEq(f, "madvise", 2, madvFree); err != nil { + return err + } + if err = allowCmpEq(f, "umask", 0, 022); err != nil { + return err + } + if err = allowCmpEq(f, "rt_sigprocmask", 0, sigBlock, sigSetmask); err != nil { + return err + } + if err = allowCmpEq(f, "epoll_ctl", 1, syscall.EPOLL_CTL_ADD, syscall.EPOLL_CTL_MOD, syscall.EPOLL_CTL_DEL); err != nil { + return err + } + if err = torFilterPrctl(f); err != nil { + return err + } + if err = allowCmpEq(f, "mprotect", 2, syscall.PROT_READ, syscall.PROT_NONE); err != nil { + return err + } + if err = allowCmpEq(f, "flock", 1, syscall.LOCK_EX|syscall.LOCK_NB, syscall.LOCK_UN); err != nil { + return err + } + if err = allowCmpEq(f, "futex", 1, futexWaitBitsetPrivate|futexClockRealtime, futexWaitPrivate, futexWakePrivate); err != nil { + return err + } + if err = allowCmpEq(f, "mremap", 3, mremapMaymove); err != nil { + return err + } + if err = torFilterPoll(f); err != nil { + return err + } + if err = torFilterSocket(f, is386); err != nil { + return err + } + if err = torFilterSetsockopt(f, is386); err != nil { + return err + } + if err = torFilterGetsockopt(f, is386); err != nil { + return err + } + if err = torFilterSocketpair(f, is386); err != nil { + return err + } + if err = torFilterMmap(f, is386); err != nil { + return err + } + + if useBridges { + // XXX: One day, all the PTs will live in their own containers. + // + // Till then, just whitelist the extra calls obfs4proxy needs. + obfsCalls := []string{ + "mincore", + "dup2", + "select", + "mkdirat", + "fsync", + "getpeername", + "getppid", + } + if is386 { + obfsCalls = append(obfsCalls, "newselect") + } + if err = allowSyscalls(f, obfsCalls, is386); err != nil { + return err + } + + // `mmap` -> `arg2 == PROT_NONE && (arg3 == MAP_PRIVATE|MAP_ANONYMOUS || arg3 == MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS)` + if err = allowCmpEq(f, "epoll_create1", 0, syscall.EPOLL_CLOEXEC); err != nil { + return err + } + if err = allowCmpEq(f, "mprotect", 2, syscall.PROT_READ|syscall.PROT_WRITE); err != nil { + return err + } + if err = allowCmpEq(f, "futex", 1, futexWake, futexWait); err != nil { + return err + } + if err = obfsFilterSetsockopt(f, is386); err != nil { + return err + } + if err = obfsFilterMmap(f, is386); err != nil { + return err + } + } + + return f.ExportBPF(fd) +} + +func torFilterPrctl(f *seccomp.ScmpFilter) error { + scall, err := seccomp.GetSyscallFromName("prctl") + if err != nil { + return err + } + + isPrSetDumpable, err := seccomp.MakeCondition(0, seccomp.CompareEqual, syscall.PR_SET_DUMPABLE) + if err != nil { + return err + } + arg1IsZero, err := seccomp.MakeCondition(1, seccomp.CompareEqual, 0) + if err != nil { + return err + } + if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isPrSetDumpable, arg1IsZero}); err != nil { + return err + } + + isPrSetDeathsig, err := seccomp.MakeCondition(0, seccomp.CompareEqual, syscall.PR_SET_PDEATHSIG) + if err != nil { + return err + } + return f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isPrSetDeathsig}) +} + +func torFilterPoll(f *seccomp.ScmpFilter) error { + scall, err := seccomp.GetSyscallFromName("poll") + if err != nil { + return err + } + + isPollIn, err := seccomp.MakeCondition(1, seccomp.CompareEqual, pollIn) + if err != nil { + return err + } + timeoutIsTen, err := seccomp.MakeCondition(2, seccomp.CompareEqual, 10) + if err != nil { + return err + } + return f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isPollIn, timeoutIsTen}) +} + +func torFilterSocket(f *seccomp.ScmpFilter, is386 bool) error { + scall, err := seccomp.GetSyscallFromName("socket") + if err != nil { + return err + } + if is386 { + return f.AddRule(scall, seccomp.ActAllow) + } + + // XXX: Tighten this some more. + return allowCmpEq(f, "socket", 0, syscall.AF_UNIX, syscall.AF_INET, syscall.AF_INET6, syscall.AF_NETLINK) +} + +func torFilterSetsockopt(f *seccomp.ScmpFilter, is386 bool) error { + scall, err := seccomp.GetSyscallFromName("setsockopt") + if err != nil { + return err + } + if is386 { + return f.AddRule(scall, seccomp.ActAllow) + } + + isSolSocket, err := seccomp.MakeCondition(1, seccomp.CompareEqual, syscall.SOL_SOCKET) + if err != nil { + return err + } + + okOpts := []uint64{ + syscall.SO_REUSEADDR, + syscall.SO_SNDBUF, + syscall.SO_RCVBUF, + } + + for _, opt := range okOpts { + isOpt, err := seccomp.MakeCondition(2, seccomp.CompareEqual, opt) + if err != nil { + return err + } + if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isSolSocket, isOpt}); err != nil { + return err + } + } + + return nil +} + +func torFilterGetsockopt(f *seccomp.ScmpFilter, is386 bool) error { + scall, err := seccomp.GetSyscallFromName("getsockopt") + if err != nil { + return err + } + if is386 { + return f.AddRule(scall, seccomp.ActAllow) + } + + isSolSocket, err := seccomp.MakeCondition(1, seccomp.CompareEqual, syscall.SOL_SOCKET) + if err != nil { + return err + } + optIsError, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.SO_ERROR) + if err != nil { + return err + } + return f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isSolSocket, optIsError}) +} + +func torFilterSocketpair(f *seccomp.ScmpFilter, is386 bool) error { + scall, err := seccomp.GetSyscallFromName("socketpair") + if err != nil { + return err + } + if is386 { + return f.AddRule(scall, seccomp.ActAllow) + } + + isPfLocal, err := seccomp.MakeCondition(0, seccomp.CompareEqual, syscall.AF_LOCAL) + if err != nil { + return err + } + + // XXX: src/common/compat.c:tor_socketpair looks like it uses SOCK_CLOEXEC, + // but according to strace, fcntl is used to actually set the flag (6.0.6). + okTypes := []uint64{ + syscall.SOCK_STREAM, + syscall.SOCK_STREAM | syscall.SOCK_CLOEXEC, + } + for _, t := range okTypes { + isType, err := seccomp.MakeCondition(1, seccomp.CompareEqual, t) + if err != nil { + return err + } + if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isPfLocal, isType}); err != nil { + return err + } + } + return nil +} + +func torFilterMmap(f *seccomp.ScmpFilter, is386 bool) error { + scallMmap, err := seccomp.GetSyscallFromName("mmap") + if err != nil { + return err + } + scalls := []seccomp.ScmpSyscall{scallMmap} + if is386 { + scallMmap2, err := seccomp.GetSyscallFromName("mmap2") + if err != nil { + return err + } + scalls = append(scalls, scallMmap2) + } + + // (arg2 == PROT_READ && arg3 == MAP_PRIVATE) + isProtRead, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.PROT_READ) + if err != nil { + return err + } + isPrivate, err := seccomp.MakeCondition(3, seccomp.CompareEqual, syscall.MAP_PRIVATE) + if err != nil { + return err + } + for _, scall := range scalls { + if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isProtRead, isPrivate}); err != nil { + return err + } + } + + // (arg2 == PROT_NONE && arg3 == MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE) + isProtNone, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.PROT_NONE) + if err != nil { + return err + } + isProtNoneFlags, err := seccomp.MakeCondition(3, seccomp.CompareEqual, syscall.MAP_PRIVATE|syscall.MAP_ANONYMOUS|syscall.MAP_NORESERVE) + if err != nil { + return err + } + for _, scall := range scalls { + if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isProtNone, isProtNoneFlags}); err != nil { + return err + } + } + + isProtReadWrite, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.PROT_READ|syscall.PROT_WRITE) + if err != nil { + return err + } + rwFlags := []uint64{ + syscall.MAP_PRIVATE | syscall.MAP_ANONYMOUS, + syscall.MAP_PRIVATE | syscall.MAP_ANONYMOUS | syscall.MAP_STACK, + syscall.MAP_PRIVATE | syscall.MAP_FIXED | syscall.MAP_DENYWRITE, + syscall.MAP_PRIVATE | syscall.MAP_FIXED | syscall.MAP_ANONYMOUS, + syscall.MAP_PRIVATE | syscall.MAP_DENYWRITE, + } + for _, flag := range rwFlags { + isFlag, err := seccomp.MakeCondition(3, seccomp.CompareEqual, flag) + if err != nil { + return err + } + for _, scall := range scalls { + if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isProtReadWrite, isFlag}); err != nil { + return err + } + } + } + + // (arg2 == PROT_READ | PROT_EXEC && arg3 == MAP_PRIVATE | MAP_DENYWRITE) + // This is needed for ld-linux.so. + isProtReadExec, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.PROT_READ|syscall.PROT_EXEC) + if err != nil { + return err + } + isProtReadExecFlags, err := seccomp.MakeCondition(3, seccomp.CompareEqual, syscall.MAP_PRIVATE|syscall.MAP_DENYWRITE) + if err != nil { + return err + } + for _, scall := range scalls { + if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isProtReadExec, isProtReadExecFlags}); err != nil { + return err + } + } + + return nil +} + +func obfsFilterSetsockopt(f *seccomp.ScmpFilter, is386 bool) error { + // 386 already blindly allows all setsockopt() calls. + if is386 { + return nil + } + + scall, err := seccomp.GetSyscallFromName("setsockopt") + if err != nil { + return err + } + + isSolTcp, err := seccomp.MakeCondition(1, seccomp.CompareEqual, syscall.SOL_TCP) + if err != nil { + return err + } + isTcpNodelay, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.TCP_NODELAY) + if err != nil { + return err + } + if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isSolTcp, isTcpNodelay}); err != nil { + return err + } + + isSolSocket, err := seccomp.MakeCondition(1, seccomp.CompareEqual, syscall.SOL_SOCKET) + if err != nil { + return err + } + isSoBroadcast, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.SO_BROADCAST) + if err != nil { + return err + } + if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isSolSocket, isSoBroadcast}); err != nil { + return err + } + + isSolIpv6, err := seccomp.MakeCondition(1, seccomp.CompareEqual, syscall.SOL_IPV6) + if err != nil { + return err + } + isIpv6Only, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.IPV6_V6ONLY) + if err != nil { + return err + } + if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isSolIpv6, isIpv6Only}); err != nil { + return err + } + + return nil +} + +// `mmap` -> `arg2 == PROT_NONE && (arg3 == MAP_PRIVATE|MAP_ANONYMOUS || arg3 == MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS)` +func obfsFilterMmap(f *seccomp.ScmpFilter, is386 bool) error { + scallMmap, err := seccomp.GetSyscallFromName("mmap") + if err != nil { + return err + } + scalls := []seccomp.ScmpSyscall{scallMmap} + if is386 { + scallMmap2, err := seccomp.GetSyscallFromName("mmap2") + if err != nil { + return err + } + scalls = append(scalls, scallMmap2) + } + + isProtNone, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.PROT_NONE) + if err != nil { + return err + } + protNoneFlags := []uint64{ + syscall.MAP_PRIVATE | syscall.MAP_ANONYMOUS, + syscall.MAP_PRIVATE | syscall.MAP_FIXED | syscall.MAP_ANONYMOUS, + } + for _, flag := range protNoneFlags { + isFlag, err := seccomp.MakeCondition(3, seccomp.CompareEqual, flag) + if err != nil { + return err + } + for _, scall := range scalls { + if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isProtNone, isFlag}); err != nil { + return err + } + } + } + return nil +} diff --git a/src/cmd/sandboxed-tor-browser/internal/sandbox/seccomp.go b/src/cmd/sandboxed-tor-browser/internal/sandbox/seccomp.go index 967d5b8..c88005e 100644 --- a/src/cmd/sandboxed-tor-browser/internal/sandbox/seccomp.go +++ b/src/cmd/sandboxed-tor-browser/internal/sandbox/seccomp.go @@ -17,117 +17,34 @@ package sandbox import ( - "log" + "os" "runtime" - seccomp "github.com/seccomp/libseccomp-golang" + "cmd/sandboxed-tor-browser/internal/data" ) -const ( - madvNormal = 0 // MADV_NORMAL - madvDontneed = 4 // MADV_DONTNEED - madvFree = 8 // MADV_FREE - mremapMaymove = 1 - - sigBlock = 1 // SIG_BLOCK - sigSetmask = 2 // SIG_SETMASK - - futexWait = 0 - futexWake = 1 - futexFd = 2 - futexRequeue = 3 - futexCmpRequeue = 4 - futexWakeOp = 5 - futexLockPi = 6 - futexUnlockPi = 7 - futexTrylockPi = 8 - futexWaitBitset = 9 - futexWakeBitset = 10 - futexWaitRequeuePi = 11 - futexCmpRequeuePi = 12 - - futexPrivateFlag = 128 - futexClockRealtime = 256 - - futexWaitPrivate = futexWait | futexPrivateFlag - futexWakePrivate = futexWake | futexPrivateFlag - futexRequeuePrivate = futexRequeue | futexPrivateFlag - futexCmpRequeuePrivate = futexCmpRequeue | futexPrivateFlag - futexWakeOpPrivate = futexWakeOp | futexPrivateFlag - futexLockPiPrivate = futexLockPi | futexPrivateFlag - futexUnlockPiPrivate = futexUnlockPi | futexPrivateFlag - futexTrylockPiPrivate = futexTrylockPi | futexPrivateFlag - futexWaitBitsetPrivate = futexWaitBitset | futexPrivateFlag - futexWakeBitsetPrivate = futexWakeBitset | futexPrivateFlag - futexWaitRequeuePiPrivate = futexWaitRequeuePi | futexPrivateFlag - futexCmpRequeuePiPrivate = futexCmpRequeuePi | futexPrivateFlag - - pollIn = 1 - - fionread = 0x541b - tcgets = 0x5401 - tiocgpgrp = 0x540f -) - -func newWhitelist() (*seccomp.ScmpFilter, error) { - arch, err := seccomp.GetNativeArch() - if err != nil { - return nil, err +func installTorSeccompProfile(fd *os.File, useBridges bool) error { + assetFile := "tor-" + if useBridges { + assetFile = assetFile + "obfs4-" } + assetFile = assetFile + runtime.GOARCH + ".bpf" - actENOSYS := seccomp.ActErrno.SetReturnCode(38) - f, err := seccomp.NewFilter(actENOSYS) + bpf, err := data.Asset(assetFile) if err != nil { - return nil, err - } - - if err = f.AddArch(arch); err != nil { - f.Release() - return nil, err + return err } - return f, nil + return writeBuffer(fd, bpf) } -func allowSyscalls(f *seccomp.ScmpFilter, calls []string) error { - for _, scallName := range calls { - scall, err := seccomp.GetSyscallFromName(scallName) - if err != nil { - if is386() && scallName == "newselect" { - scall = seccomp.ScmpSyscall(142) - } else { - log.Printf("seccomp: unknown system call: %v", scallName) - continue - } - } - if err = f.AddRule(scall, seccomp.ActAllow); err != nil { - return err - } - } - return nil -} +func installTorBrowserSeccompProfile(fd *os.File) error { + assetFile := "torbrowser-" + runtime.GOARCH + ".bpf" -func allowCmpEq(f *seccomp.ScmpFilter, scallName string, arg uint, values ...uint64) error { - scall, err := seccomp.GetSyscallFromName(scallName) + bpf, err := data.Asset(assetFile) if err != nil { - log.Printf("seccomp: unknown system call: %v", scallName) - return nil - } - - // Allow if the arg matches any of the values. Implemented as multiple - // rules. - for _, v := range values { - argIsEqual, err := seccomp.MakeCondition(arg, seccomp.CompareEqual, v) - if err != nil { - return err - } - if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{argIsEqual}); err != nil { - return err - } + return err } - return nil -} -func is386() bool { - return runtime.GOARCH == "386" + return writeBuffer(fd, bpf) } diff --git a/src/cmd/sandboxed-tor-browser/internal/sandbox/seccomp_firefox.go b/src/cmd/sandboxed-tor-browser/internal/sandbox/seccomp_firefox.go deleted file mode 100644 index 4c09eda..0000000 --- a/src/cmd/sandboxed-tor-browser/internal/sandbox/seccomp_firefox.go +++ /dev/null @@ -1,250 +0,0 @@ -// secomp_firefox.go - Firefox sandbox seccomp rules. -// Copyright (C) 2016 Yawning Angel. -// -// This program is free software: you can redistribute it and/or modify -// it under the terms of the GNU Affero General Public License as -// published by the Free Software Foundation, either version 3 of the -// License, or (at your option) any later version. -// -// This program 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 Affero General Public License for more details. -// -// You should have received a copy of the GNU Affero General Public License -// along with this program. If not, see <http://www.gnu.org/licenses/>. - -package sandbox - -import ( - "os" - "syscall" - // seccomp "github.com/seccomp/libseccomp-golang" -) - -func installTorBrowserSeccompProfile(fd *os.File) error { - defer fd.Close() - - f, err := newWhitelist() - if err != nil { - return err - } - defer f.Release() - - allowedNoArgs := []string{ - "clock_gettime", - "clock_getres", - "gettimeofday", - "nanosleep", - "sched_yield", - - "open", - "openat", - "pread64", - "read", - "recvfrom", - "pwrite64", - "sendto", - "write", - "writev", - "close", - - "access", - "creat", - "chmod", - "chdir", - "dup2", - "dup", - "fadvise64", - "fallocate", - "fcntl", - "fchmod", - "fchown", - "fchdir", - "fdatasync", - "fstat", - "fstatfs", - "ftruncate", - "fsync", - "getcwd", - "getdents", - "getdents64", - "link", - "lseek", - "lstat", - "mkdir", - "name_to_handle_at", - "newfstatat", - "pipe", - "pipe2", - "readahead", - "readlink", - "readlinkat", - "rename", - "rmdir", - "stat", - "splice", - "statfs", - "symlink", - "unlink", - "utime", - "utimes", - - "accept4", - "bind", - "connect", - "epoll_create", - "epoll_create1", - "epoll_ctl", - "epoll_wait", - "eventfd2", - "getsockname", - "getsockopt", - "getpeername", - "listen", - "poll", - "ppoll", - "recvmsg", - "socketpair", - "select", - "sendmsg", - "setsockopt", - "shutdown", - - "inotify_add_watch", - "inotify_init1", - "inotify_rm_watch", - - "brk", - "mincore", - "mmap", - "mlock", - "mprotect", - "mremap", - "munmap", - - // XXX: Remove these? - "shmdt", - "shmat", - "shmctl", - "shmget", - - "alarm", - "execve", - "getrandom", - "getrlimit", - "getrusage", - "getpgrp", - "getppid", - "getpid", - "getpriority", - "getresgid", - "getresuid", - "gettid", - "getuid", - "geteuid", - "getgid", - "getegid", - "rt_sigaction", - "rt_sigprocmask", - "rt_sigreturn", - "sigaltstack", - "setrlimit", - - "arch_prctl", - "capset", - "capget", - "clone", - "exit", - "exit_group", - "kill", - "restart_syscall", - "seccomp", - "sched_getaffinity", - "sched_setscheduler", - "setpriority", - "set_robust_list", - "setsid", - "set_tid_address", - "setresuid", - "setresgid", - "sysinfo", - "tgkill", - "umask", - "uname", - "unshare", - "wait4", - - // Firefox uses this, but will take no for an answer. - // "quotactl", - - // Subgraph's profile has these, but that's for Tor Browser Launcher. - // - // "vfork", - // "memfd_create", (PulseAudio? Won't work in our container.) - // "personality", - } - if is386() { - allowedNoArgs386 := []string{ - "fadvise64_64", - "fcntl64", - "fstat64", - "fstatfs64", - "ftruncate64", - "lstat64", - "stat64", - "statfs64", - "_llseek", - - "mmap2", - "prlimit64", - "ugetrlimit", - "set_thread_area", - "waitpid", - - "getgid32", - "getuid32", - "getresgid32", - "getresuid32", - - "recv", - "send", - "newselect", - "socketcall", - - "socket", // Filtered on amd64. - } - allowedNoArgs = append(allowedNoArgs, allowedNoArgs386...) - } - if err = allowSyscalls(f, allowedNoArgs); err != nil { - return err - } - - // Because we patch PulseAudio's mutex creation, we can omit all PI futex - // calls. - if err = allowCmpEq(f, "futex", 1, futexWait, futexWaitPrivate, futexWakePrivate, futexCmpRequeuePrivate, futexWakeOpPrivate, futexWaitBitsetPrivate|futexClockRealtime, futexWake, futexWaitBitsetPrivate); err != nil { - return err - } - - if err = allowCmpEq(f, "madvise", 2, madvNormal, madvDontneed); err != nil { - return err - } - if err = allowCmpEq(f, "ioctl", 1, fionread, tcgets, tiocgpgrp); err != nil { - return err - } - if err = allowCmpEq(f, "prctl", 0, syscall.PR_SET_NAME, syscall.PR_GET_NAME, syscall.PR_GET_TIMERSLACK, syscall.PR_SET_SECCOMP); err != nil { - return err - } - - if is386() { - if err = allowCmpEq(f, "time", 0, 0); err != nil { - return err - } - } else { - if err = allowCmpEq(f, "socket", 0, syscall.AF_UNIX); err != nil { - return err - } - } - - return f.ExportBPF(fd) -} diff --git a/src/cmd/sandboxed-tor-browser/internal/sandbox/seccomp_tor.go b/src/cmd/sandboxed-tor-browser/internal/sandbox/seccomp_tor.go deleted file mode 100644 index 182a1f9..0000000 --- a/src/cmd/sandboxed-tor-browser/internal/sandbox/seccomp_tor.go +++ /dev/null @@ -1,536 +0,0 @@ -// secomp_tor.go - Sandbox tor seccomp rules. -// Copyright (C) 2016 Yawning Angel. -// -// This program is free software: you can redistribute it and/or modify -// it under the terms of the GNU Affero General Public License as -// published by the Free Software Foundation, either version 3 of the -// License, or (at your option) any later version. -// -// This program 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 Affero General Public License for more details. -// -// You should have received a copy of the GNU Affero General Public License -// along with this program. If not, see <http://www.gnu.org/licenses/>. - -package sandbox - -import ( - "os" - "syscall" - - seccomp "github.com/seccomp/libseccomp-golang" -) - -func installTorSeccompProfile(fd *os.File, useBridges bool) error { - defer fd.Close() - - f, err := newWhitelist() - if err != nil { - return err - } - defer f.Release() - - allowedNoArgs := []string{ - "access", - "brk", - "clock_gettime", - "close", - "clone", - "epoll_create", - "epoll_wait", - "eventfd2", - "pipe2", - "pipe", - "fcntl", - "fstat", - "getdents", - "getdents64", - "getegid", - "geteuid", - "getgid", - "getrlimit", - "gettimeofday", - "gettid", - "getuid", - "lseek", - "mkdir", - "munmap", - "prlimit64", - "read", - "rt_sigreturn", - "sched_getaffinity", - "sched_yield", - "sendmsg", - "set_robust_list", - "setrlimit", - "sigaltstack", - "stat", - "uname", - "wait4", - "write", - "writev", - "exit_group", - "exit", - "getrandom", - "sysinfo", - "bind", - "listen", - "connect", - "getsockname", - "recvmsg", - "recvfrom", - "sendto", - "unlink", - - // XXX: Calls that should be filtered by arg, but aren't yet. - "rt_sigaction", - "accept4", - - // Calls that tor can filter, but I can't due to not being in - // the tor daemon's process space. - "chown", - "chmod", - "open", - "openat", - "rename", - - // Calls made prior to tor's UseSeccomp being installed. - "arch_prctl", - "chdir", - "execve", - "getpid", - "kill", - "restart_syscall", - "set_tid_address", - "unshare", - } - if is386() { - allowedNoArgs386 := []string{ - "fstat64", - "getegid32", - "geteuid32", - "getgid32", - "getuid32", - "_llseek", - "sigreturn", - "fcntl64", // XXX: Filter by arg. - - "recv", - "send", - "stat64", - "socketcall", // Sigh... (see accept4 in the tor code) - "prlimit", - - "ugetrlimit", - "set_thread_area", - } - allowedNoArgs = append(allowedNoArgs, allowedNoArgs386...) - } - if err = allowSyscalls(f, allowedNoArgs); err != nil { - return err - } - - if err = allowCmpEq(f, "time", 0, 0); err != nil { - return err - } - if err = allowCmpEq(f, "madvise", 2, madvFree); err != nil { - return err - } - if err = allowCmpEq(f, "umask", 0, 022); err != nil { - return err - } - if err = allowCmpEq(f, "rt_sigprocmask", 0, sigBlock, sigSetmask); err != nil { - return err - } - if err = allowCmpEq(f, "epoll_ctl", 1, syscall.EPOLL_CTL_ADD, syscall.EPOLL_CTL_MOD, syscall.EPOLL_CTL_DEL); err != nil { - return err - } - if err = torFilterPrctl(f); err != nil { - return err - } - if err = allowCmpEq(f, "mprotect", 2, syscall.PROT_READ, syscall.PROT_NONE); err != nil { - return err - } - if err = allowCmpEq(f, "flock", 1, syscall.LOCK_EX|syscall.LOCK_NB, syscall.LOCK_UN); err != nil { - return err - } - if err = allowCmpEq(f, "futex", 1, futexWaitBitsetPrivate|futexClockRealtime, futexWaitPrivate, futexWakePrivate); err != nil { - return err - } - if err = allowCmpEq(f, "mremap", 3, mremapMaymove); err != nil { - return err - } - if err = torFilterPoll(f); err != nil { - return err - } - if err = torFilterSocket(f); err != nil { - return err - } - if err = torFilterSetsockopt(f); err != nil { - return err - } - if err = torFilterGetsockopt(f); err != nil { - return err - } - if err = torFilterSocketpair(f); err != nil { - return err - } - if err = torFilterMmap(f); err != nil { - return err - } - - if useBridges { - // XXX: One day, all the PTs will live in their own containers. - // - // Till then, just whitelist the extra calls obfs4proxy needs. - obfsCalls := []string{ - "mincore", - "dup2", - "select", - "mkdirat", - "fsync", - "getpeername", - "getppid", - } - if is386() { - obfsCalls = append(obfsCalls, "newselect") - } - if err = allowSyscalls(f, obfsCalls); err != nil { - return err - } - - // `mmap` -> `arg2 == PROT_NONE && (arg3 == MAP_PRIVATE|MAP_ANONYMOUS || arg3 == MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS)` - if err = allowCmpEq(f, "epoll_create1", 0, syscall.EPOLL_CLOEXEC); err != nil { - return err - } - if err = allowCmpEq(f, "mprotect", 2, syscall.PROT_READ|syscall.PROT_WRITE); err != nil { - return err - } - if err = allowCmpEq(f, "futex", 1, futexWake, futexWait); err != nil { - return err - } - if err = obfsFilterSetsockopt(f); err != nil { - return err - } - if err = obfsFilterMmap(f); err != nil { - return err - } - } - - return f.ExportBPF(fd) -} - -func torFilterPrctl(f *seccomp.ScmpFilter) error { - scall, err := seccomp.GetSyscallFromName("prctl") - if err != nil { - return err - } - - isPrSetDumpable, err := seccomp.MakeCondition(0, seccomp.CompareEqual, syscall.PR_SET_DUMPABLE) - if err != nil { - return err - } - arg1IsZero, err := seccomp.MakeCondition(1, seccomp.CompareEqual, 0) - if err != nil { - return err - } - if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isPrSetDumpable, arg1IsZero}); err != nil { - return err - } - - isPrSetDeathsig, err := seccomp.MakeCondition(0, seccomp.CompareEqual, syscall.PR_SET_PDEATHSIG) - if err != nil { - return err - } - return f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isPrSetDeathsig}) -} - -func torFilterPoll(f *seccomp.ScmpFilter) error { - scall, err := seccomp.GetSyscallFromName("poll") - if err != nil { - return err - } - - isPollIn, err := seccomp.MakeCondition(1, seccomp.CompareEqual, pollIn) - if err != nil { - return err - } - timeoutIsTen, err := seccomp.MakeCondition(2, seccomp.CompareEqual, 10) - if err != nil { - return err - } - return f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isPollIn, timeoutIsTen}) -} - -func torFilterSocket(f *seccomp.ScmpFilter) error { - scall, err := seccomp.GetSyscallFromName("socket") - if err != nil { - return err - } - if is386() { - return f.AddRule(scall, seccomp.ActAllow) - } - - // XXX: Tighten this some more. - return allowCmpEq(f, "socket", 0, syscall.AF_UNIX, syscall.AF_INET, syscall.AF_INET6, syscall.AF_NETLINK) -} - -func torFilterSetsockopt(f *seccomp.ScmpFilter) error { - scall, err := seccomp.GetSyscallFromName("setsockopt") - if err != nil { - return err - } - if is386() { - return f.AddRule(scall, seccomp.ActAllow) - } - - isSolSocket, err := seccomp.MakeCondition(1, seccomp.CompareEqual, syscall.SOL_SOCKET) - if err != nil { - return err - } - - okOpts := []uint64{ - syscall.SO_REUSEADDR, - syscall.SO_SNDBUF, - syscall.SO_RCVBUF, - } - - for _, opt := range okOpts { - isOpt, err := seccomp.MakeCondition(2, seccomp.CompareEqual, opt) - if err != nil { - return err - } - if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isSolSocket, isOpt}); err != nil { - return err - } - } - - return nil -} - -func torFilterGetsockopt(f *seccomp.ScmpFilter) error { - scall, err := seccomp.GetSyscallFromName("getsockopt") - if err != nil { - return err - } - if is386() { - return f.AddRule(scall, seccomp.ActAllow) - } - - isSolSocket, err := seccomp.MakeCondition(1, seccomp.CompareEqual, syscall.SOL_SOCKET) - if err != nil { - return err - } - optIsError, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.SO_ERROR) - if err != nil { - return err - } - return f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isSolSocket, optIsError}) -} - -func torFilterSocketpair(f *seccomp.ScmpFilter) error { - scall, err := seccomp.GetSyscallFromName("socketpair") - if err != nil { - return err - } - if is386() { - return f.AddRule(scall, seccomp.ActAllow) - } - - isPfLocal, err := seccomp.MakeCondition(0, seccomp.CompareEqual, syscall.AF_LOCAL) - if err != nil { - return err - } - - // XXX: src/common/compat.c:tor_socketpair looks like it uses SOCK_CLOEXEC, - // but according to strace, fcntl is used to actually set the flag (6.0.6). - okTypes := []uint64{ - syscall.SOCK_STREAM, - syscall.SOCK_STREAM | syscall.SOCK_CLOEXEC, - } - for _, t := range okTypes { - isType, err := seccomp.MakeCondition(1, seccomp.CompareEqual, t) - if err != nil { - return err - } - if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isPfLocal, isType}); err != nil { - return err - } - } - return nil -} - -func torFilterMmap(f *seccomp.ScmpFilter) error { - scallMmap, err := seccomp.GetSyscallFromName("mmap") - if err != nil { - return err - } - scalls := []seccomp.ScmpSyscall{scallMmap} - if is386() { - scallMmap2, err := seccomp.GetSyscallFromName("mmap2") - if err != nil { - return err - } - scalls = append(scalls, scallMmap2) - } - - // (arg2 == PROT_READ && arg3 == MAP_PRIVATE) - isProtRead, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.PROT_READ) - if err != nil { - return err - } - isPrivate, err := seccomp.MakeCondition(3, seccomp.CompareEqual, syscall.MAP_PRIVATE) - if err != nil { - return err - } - for _, scall := range scalls { - if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isProtRead, isPrivate}); err != nil { - return err - } - } - - // (arg2 == PROT_NONE && arg3 == MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE) - isProtNone, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.PROT_NONE) - if err != nil { - return err - } - isProtNoneFlags, err := seccomp.MakeCondition(3, seccomp.CompareEqual, syscall.MAP_PRIVATE|syscall.MAP_ANONYMOUS|syscall.MAP_NORESERVE) - if err != nil { - return err - } - for _, scall := range scalls { - if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isProtNone, isProtNoneFlags}); err != nil { - return err - } - } - - isProtReadWrite, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.PROT_READ|syscall.PROT_WRITE) - if err != nil { - return err - } - rwFlags := []uint64{ - syscall.MAP_PRIVATE | syscall.MAP_ANONYMOUS, - syscall.MAP_PRIVATE | syscall.MAP_ANONYMOUS | syscall.MAP_STACK, - syscall.MAP_PRIVATE | syscall.MAP_FIXED | syscall.MAP_DENYWRITE, - syscall.MAP_PRIVATE | syscall.MAP_FIXED | syscall.MAP_ANONYMOUS, - syscall.MAP_PRIVATE | syscall.MAP_DENYWRITE, - } - for _, flag := range rwFlags { - isFlag, err := seccomp.MakeCondition(3, seccomp.CompareEqual, flag) - if err != nil { - return err - } - for _, scall := range scalls { - if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isProtReadWrite, isFlag}); err != nil { - return err - } - } - } - - // (arg2 == PROT_READ | PROT_EXEC && arg3 == MAP_PRIVATE | MAP_DENYWRITE) - // This is needed for ld-linux.so. - isProtReadExec, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.PROT_READ|syscall.PROT_EXEC) - if err != nil { - return err - } - isProtReadExecFlags, err := seccomp.MakeCondition(3, seccomp.CompareEqual, syscall.MAP_PRIVATE|syscall.MAP_DENYWRITE) - if err != nil { - return err - } - for _, scall := range scalls { - if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isProtReadExec, isProtReadExecFlags}); err != nil { - return err - } - } - - return nil -} - -func obfsFilterSetsockopt(f *seccomp.ScmpFilter) error { - // 386 already blindly allows all setsockopt() calls. - if is386() { - return nil - } - - scall, err := seccomp.GetSyscallFromName("setsockopt") - if err != nil { - return err - } - - isSolTcp, err := seccomp.MakeCondition(1, seccomp.CompareEqual, syscall.SOL_TCP) - if err != nil { - return err - } - isTcpNodelay, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.TCP_NODELAY) - if err != nil { - return err - } - if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isSolTcp, isTcpNodelay}); err != nil { - return err - } - - isSolSocket, err := seccomp.MakeCondition(1, seccomp.CompareEqual, syscall.SOL_SOCKET) - if err != nil { - return err - } - isSoBroadcast, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.SO_BROADCAST) - if err != nil { - return err - } - if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isSolSocket, isSoBroadcast}); err != nil { - return err - } - - isSolIpv6, err := seccomp.MakeCondition(1, seccomp.CompareEqual, syscall.SOL_IPV6) - if err != nil { - return err - } - isIpv6Only, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.IPV6_V6ONLY) - if err != nil { - return err - } - if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isSolIpv6, isIpv6Only}); err != nil { - return err - } - - return nil -} - -// `mmap` -> `arg2 == PROT_NONE && (arg3 == MAP_PRIVATE|MAP_ANONYMOUS || arg3 == MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS)` -func obfsFilterMmap(f *seccomp.ScmpFilter) error { - scallMmap, err := seccomp.GetSyscallFromName("mmap") - if err != nil { - return err - } - scalls := []seccomp.ScmpSyscall{scallMmap} - if is386() { - scallMmap2, err := seccomp.GetSyscallFromName("mmap2") - if err != nil { - return err - } - scalls = append(scalls, scallMmap2) - } - - isProtNone, err := seccomp.MakeCondition(2, seccomp.CompareEqual, syscall.PROT_NONE) - if err != nil { - return err - } - protNoneFlags := []uint64{ - syscall.MAP_PRIVATE | syscall.MAP_ANONYMOUS, - syscall.MAP_PRIVATE | syscall.MAP_FIXED | syscall.MAP_ANONYMOUS, - } - for _, flag := range protNoneFlags { - isFlag, err := seccomp.MakeCondition(3, seccomp.CompareEqual, flag) - if err != nil { - return err - } - for _, scall := range scalls { - if err = f.AddRuleConditional(scall, seccomp.ActAllow, []seccomp.ScmpCondition{isProtNone, isFlag}); err != nil { - return err - } - } - } - return nil -}

1 0

[translation/tails-greeter_completed] Update translations for tails-greeter_completed
by translation＠torproject.org 05 Dec '16

05 Dec '16

commit 5e2059969acb5d0cfacc85b1280c4826cef8f636 Author: Translation commit bot <translation(a)torproject.org> Date: Mon Dec 5 00:45:46 2016 +0000 Update translations for tails-greeter_completed --- pt_BR/pt_BR.po | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/pt_BR/pt_BR.po b/pt_BR/pt_BR.po index c5c7a11..3d8d298 100644 --- a/pt_BR/pt_BR.po +++ b/pt_BR/pt_BR.po @@ -18,7 +18,7 @@ msgstr "" "Project-Id-Version: The Tor Project\n" "Report-Msgid-Bugs-To: \n" "POT-Creation-Date: 2016-09-02 14:43+0200\n" -"PO-Revision-Date: 2016-12-04 22:43+0000\n" +"PO-Revision-Date: 2016-12-05 00:18+0000\n" "Last-Translator: Communia <ameaneantie(a)riseup.net>\n" "Language-Team: Portuguese (Brazil) (http://www.transifex.com/otf/torproject/language/pt_BR/)\n" "MIME-Version: 1.0\n"

1 0

[translation/tails-greeter] Update translations for tails-greeter
by translation＠torproject.org 05 Dec '16

05 Dec '16

commit 1d315b3f370d5e33fd9d2f55af79eefedf28b2ba Author: Translation commit bot <translation(a)torproject.org> Date: Mon Dec 5 00:45:42 2016 +0000 Update translations for tails-greeter --- pt_BR/pt_BR.po | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/pt_BR/pt_BR.po b/pt_BR/pt_BR.po index c5c7a11..3d8d298 100644 --- a/pt_BR/pt_BR.po +++ b/pt_BR/pt_BR.po @@ -18,7 +18,7 @@ msgstr "" "Project-Id-Version: The Tor Project\n" "Report-Msgid-Bugs-To: \n" "POT-Creation-Date: 2016-09-02 14:43+0200\n" -"PO-Revision-Date: 2016-12-04 22:43+0000\n" +"PO-Revision-Date: 2016-12-05 00:18+0000\n" "Last-Translator: Communia <ameaneantie(a)riseup.net>\n" "Language-Team: Portuguese (Brazil) (http://www.transifex.com/otf/torproject/language/pt_BR/)\n" "MIME-Version: 1.0\n"

1 0

[translation/tails-greeter-2_completed] Update translations for tails-greeter-2_completed
by translation＠torproject.org 05 Dec '16

05 Dec '16

commit 1c82643ace49e2f11e75d84d4f2e6584097dbb75 Author: Translation commit bot <translation(a)torproject.org> Date: Mon Dec 5 00:18:33 2016 +0000 Update translations for tails-greeter-2_completed --- pt_BR/pt_BR.po | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/pt_BR/pt_BR.po b/pt_BR/pt_BR.po index 5e8ef9f..a92f588 100644 --- a/pt_BR/pt_BR.po +++ b/pt_BR/pt_BR.po @@ -114,7 +114,7 @@ msgstr "Configurações Padrão" #: ../data/greeter.ui.h:22 msgid "Save Language & Region Settings" -msgstr "Salva Configurações de Idioma & Região" +msgstr "Salvar Configurações de Idioma & Região" #: ../data/greeter.ui.h:23 msgid "Language"

1 0

[translation/tails-greeter-2] Update translations for tails-greeter-2
by translation＠torproject.org 05 Dec '16

05 Dec '16

commit 6d77fa51825563afa312945cd810e684b01d68bd Author: Translation commit bot <translation(a)torproject.org> Date: Mon Dec 5 00:18:30 2016 +0000 Update translations for tails-greeter-2 --- pt_BR/pt_BR.po | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/pt_BR/pt_BR.po b/pt_BR/pt_BR.po index 5e8ef9f..a92f588 100644 --- a/pt_BR/pt_BR.po +++ b/pt_BR/pt_BR.po @@ -114,7 +114,7 @@ msgstr "Configurações Padrão" #: ../data/greeter.ui.h:22 msgid "Save Language & Region Settings" -msgstr "Salva Configurações de Idioma & Região" +msgstr "Salvar Configurações de Idioma & Região" #: ../data/greeter.ui.h:23 msgid "Language"

1 0

[translation/tor-messenger-authdtd_completed] Update translations for tor-messenger-authdtd_completed
by translation＠torproject.org 05 Dec '16

05 Dec '16

commit f7f6113f87e344d4d95f874faa7f1d61a4a0a512 Author: Translation commit bot <translation(a)torproject.org> Date: Mon Dec 5 00:17:47 2016 +0000 Update translations for tor-messenger-authdtd_completed --- pt_BR/auth.dtd | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/pt_BR/auth.dtd b/pt_BR/auth.dtd index 90c278b..ca4043c 100644 --- a/pt_BR/auth.dtd +++ b/pt_BR/auth.dtd @@ -16,6 +16,6 @@ <!ENTITY authDialog.qaInstruction "Para verificar a identidade de seu contato, escolha uma pergunta cuja resposta seja conhecida apenas por você e pelo contato. Insira a pergunta e a resposta, então aguarde o seu contato colocar a resposta também. Se as respostas não coincidirem, então você pode estar falando com um impostor. "> <!ENTITY authDialog.secretInstruction "Para verificar a identidade de seu contato, escolha um segredo que seja conhecido apenas por você e pelo contato. Insira o segredo e aguarde o seu contato fazer o mesmo. Se os segredos não coincidirem, pode ser que você esteja falando com um impostor. "> <!ENTITY authDialog.question "Insira a pergunta aqui:"> -<!ENTITY authDialog.answer "Insira a pergunta secreta aqui "> +<!ENTITY authDialog.answer "Insira resposta secreta aqui "> <!ENTITY authDialog.secret "Insira o segredo aqui:"> <!ENTITY authDialog.waiting "Esperando pelo contato..."> \ No newline at end of file

1 0

[translation/tor-messenger-authdtd] Update translations for tor-messenger-authdtd
by translation＠torproject.org 05 Dec '16

05 Dec '16

commit 5e95319fa59b415b94ea387114c7878d9c0cbb48 Author: Translation commit bot <translation(a)torproject.org> Date: Mon Dec 5 00:17:44 2016 +0000 Update translations for tor-messenger-authdtd --- pt_BR/auth.dtd | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/pt_BR/auth.dtd b/pt_BR/auth.dtd index 90c278b..ca4043c 100644 --- a/pt_BR/auth.dtd +++ b/pt_BR/auth.dtd @@ -16,6 +16,6 @@ <!ENTITY authDialog.qaInstruction "Para verificar a identidade de seu contato, escolha uma pergunta cuja resposta seja conhecida apenas por você e pelo contato. Insira a pergunta e a resposta, então aguarde o seu contato colocar a resposta também. Se as respostas não coincidirem, então você pode estar falando com um impostor. "> <!ENTITY authDialog.secretInstruction "Para verificar a identidade de seu contato, escolha um segredo que seja conhecido apenas por você e pelo contato. Insira o segredo e aguarde o seu contato fazer o mesmo. Se os segredos não coincidirem, pode ser que você esteja falando com um impostor. "> <!ENTITY authDialog.question "Insira a pergunta aqui:"> -<!ENTITY authDialog.answer "Insira a pergunta secreta aqui "> +<!ENTITY authDialog.answer "Insira resposta secreta aqui "> <!ENTITY authDialog.secret "Insira o segredo aqui:"> <!ENTITY authDialog.waiting "Esperando pelo contato..."> \ No newline at end of file

1 0

[translation/tails-onioncircuits_completed] Update translations for tails-onioncircuits_completed
by translation＠torproject.org 05 Dec '16

05 Dec '16

commit 9268f8d220b5af498f26eeb998b8ae8968479172 Author: Translation commit bot <translation(a)torproject.org> Date: Mon Dec 5 00:17:40 2016 +0000 Update translations for tails-onioncircuits_completed --- pt_BR/onioncircuits.pot | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/pt_BR/onioncircuits.pot b/pt_BR/onioncircuits.pot index 12cbb7f..23738b4 100644 --- a/pt_BR/onioncircuits.pot +++ b/pt_BR/onioncircuits.pot @@ -11,7 +11,7 @@ msgstr "" "Project-Id-Version: The Tor Project\n" "Report-Msgid-Bugs-To: \n" "POT-Creation-Date: 2016-05-31 14:42+0200\n" -"PO-Revision-Date: 2016-12-04 23:47+0000\n" +"PO-Revision-Date: 2016-12-04 23:48+0000\n" "Last-Translator: Communia <ameaneantie(a)riseup.net>\n" "Language-Team: Portuguese (Brazil) (http://www.transifex.com/otf/torproject/language/pt_BR/)\n" "MIME-Version: 1.0\n" @@ -42,7 +42,7 @@ msgstr "Clicar em um circuito para ver os detalhes dos retransmissores Tor." #: ../onioncircuits:221 msgid "The connection to Tor was lost..." -msgstr "Estão conexão ao Tor foi interrompida..." +msgstr "Esta conexão ao Tor foi interrompida..." #: ../onioncircuits:317 msgid "..."

1 0

[translation/tails-onioncircuits] Update translations for tails-onioncircuits
by translation＠torproject.org 05 Dec '16

05 Dec '16

commit 3105ed3643cb9352c241b938373e8a0051869b4f Author: Translation commit bot <translation(a)torproject.org> Date: Mon Dec 5 00:17:37 2016 +0000 Update translations for tails-onioncircuits --- pt_BR/onioncircuits.pot | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/pt_BR/onioncircuits.pot b/pt_BR/onioncircuits.pot index 12cbb7f..23738b4 100644 --- a/pt_BR/onioncircuits.pot +++ b/pt_BR/onioncircuits.pot @@ -11,7 +11,7 @@ msgstr "" "Project-Id-Version: The Tor Project\n" "Report-Msgid-Bugs-To: \n" "POT-Creation-Date: 2016-05-31 14:42+0200\n" -"PO-Revision-Date: 2016-12-04 23:47+0000\n" +"PO-Revision-Date: 2016-12-04 23:48+0000\n" "Last-Translator: Communia <ameaneantie(a)riseup.net>\n" "Language-Team: Portuguese (Brazil) (http://www.transifex.com/otf/torproject/language/pt_BR/)\n" "MIME-Version: 1.0\n" @@ -42,7 +42,7 @@ msgstr "Clicar em um circuito para ver os detalhes dos retransmissores Tor." #: ../onioncircuits:221 msgid "The connection to Tor was lost..." -msgstr "Estão conexão ao Tor foi interrompida..." +msgstr "Esta conexão ao Tor foi interrompida..." #: ../onioncircuits:317 msgid "..."

1 0

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tor-commits December 2016