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remove sandbox defaults into a new file

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This commit is contained in:
Jude Taylor 2015-09-29 10:08:33 -07:00
parent d4cac051f7
commit 1fc0fe1baf
3 changed files with 62 additions and 65 deletions
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70
src/libstore/build.cc
View file

@ -2439,9 +2439,11 @@ void DerivationGoal::runChild()
for (auto & i : inputPaths)
dirsInChroot[i] = i;
/* TODO: we should factor out the policy cleanly, so we don't have to repeat the constants every time... */
/* This has to appear before import statements */
sandboxProfile += "(version 1)\n";
sandboxProfile += (format("(import \"%1%/share/nix/sandbox-defaults.sb\")\n") % NIX_PREFIX).str();
/* Violations will go to the syslog if you set this. Unfortunately the destination does not appear to be configurable */
if (settings.get("darwin-log-sandbox-violations", false)) {
sandboxProfile += "(deny default)\n";
@ -2449,56 +2451,6 @@ void DerivationGoal::runChild()
sandboxProfile += "(deny default (with no-log))\n";
}
sandboxProfile += "(allow file-read* file-write-data (literal \"/dev/null\"))\n";
sandboxProfile += "(allow ipc-posix-shm* ipc-posix-sem)\n";
sandboxProfile += "(allow mach-lookup\n"
"\t(global-name \"com.apple.SecurityServer\")\n"
")\n";
sandboxProfile += "(allow file-read*\n"
"\t(literal \"/dev/dtracehelper\")\n"
"\t(literal \"/dev/tty\")\n"
"\t(literal \"/dev/autofs_nowait\")\n"
"\t(literal \"/private/var/run/systemkeychaincheck.done\")\n"
"\t(literal \"/private/etc/protocols\")\n"
"\t(literal \"/private/var/tmp\")\n"
"\t(subpath \"/usr/share/locale\")\n"
"\t(subpath \"/usr/share/zoneinfo\")\n"
"\t(literal \"/private/var/db\")\n"
"\t(subpath \"/private/var/db/mds\")\n"
")\n";
sandboxProfile += "(allow file-write*\n"
"\t(literal \"/dev/tty\")\n"
"\t(literal \"/dev/dtracehelper\")\n"
"\t(literal \"/mds\")\n"
")\n";
sandboxProfile += "(allow file-ioctl\n"
"\t(literal \"/dev/dtracehelper\")\n"
")\n";
sandboxProfile += "(allow file-read-metadata\n"
"\t(literal \"/var\")\n"
"\t(literal \"/tmp\")\n"
"\t(literal \"/etc\")\n"
"\t(literal \"/etc/nix\")\n"
"\t(literal \"/etc/nix/nix.conf\")\n"
"\t(literal \"/etc/resolv.conf\")\n"
"\t(literal \"/private/etc/resolv.conf\")\n"
")\n";
sandboxProfile += "(allow file-read*\n"
"\t(literal \"/private/etc/nix/nix.conf\")\n"
"\t(literal \"/private/var/run/resolv.conf\")\n"
")\n";
sandboxProfile += "(allow file-read* file-write*\n"
"\t(subpath \"/dev/fd\")\n"
")\n";
/* The tmpDir in scope points at the temporary build directory for our derivation. Some packages try different mechanisms
to find temporary directories, so we want to open up a broader place for them to dump their files, if needed. */
Path globalTmpDir = canonPath(getEnv("TMPDIR", "/tmp"), true);
@ -2506,20 +2458,6 @@ void DerivationGoal::runChild()
/* They don't like trailing slashes on subpath directives */
if (globalTmpDir.back() == '/') globalTmpDir.pop_back();
/* This is where our temp folders are and where most of the building will happen, so we want rwx on it. */
sandboxProfile += (format("(allow file-read* file-write* process-exec (subpath \"%1%\") (subpath \"/private/tmp\"))\n") % globalTmpDir).str();
sandboxProfile += "(allow process-fork)\n";
sandboxProfile += "(allow sysctl-read)\n";
sandboxProfile += "(allow signal (target same-sandbox))\n";
/* Enables getpwuid (used by git and others) */
sandboxProfile += "(allow mach-lookup (global-name \"com.apple.system.notification_center\") (global-name \"com.apple.system.opendirectoryd.libinfo\"))\n";
/* Allow local networking operations, mostly because lots of test suites use it and it seems mostly harmless */
sandboxProfile += "(allow network* (local ip) (remote unix-socket))";
/* Our rwx outputs */
sandboxProfile += "(allow file-read* file-write* process-exec\n";
for (auto & i : missingPaths) {
@ -2564,6 +2502,8 @@ void DerivationGoal::runChild()
args.push_back("sandbox-exec");
args.push_back("-p");
args.push_back(sandboxProfile);
args.push_back("-D");
args.push_back((format("_GLOBAL_TMP_DIR=%1%") % globalTmpDir).str());
args.push_back(drv->builder);
} else {
builder = drv->builder.c_str();

1
src/libstore/local.mk
View file

@ -33,3 +33,4 @@ $(d)/local-store.cc: $(d)/schema.sql.hh
clean-files += $(d)/schema.sql.hh
$(eval $(call install-file-in, $(d)/nix-store.pc, $(prefix)/lib/pkgconfig, 0644))
$(eval $(call install-file-in, $(d)/sandbox-defaults.sb, $(prefix)/share/nix, 0644))

56
src/libstore/sandbox-defaults.sb.in Normal file
View file

@ -0,0 +1,56 @@
(allow file-read* file-write-data (literal "/dev/null"))
(allow ipc-posix*)
(allow mach-lookup (global-name "com.apple.SecurityServer"))
(allow file-read*
(literal "/dev/dtracehelper")
(literal "/dev/tty")
(literal "/dev/autofs_nowait")
(literal "/private/var/run/systemkeychaincheck.done")
(literal "/private/etc/protocols")
(literal "/private/var/tmp")
(subpath "/usr/share/locale")
(subpath "/usr/share/zoneinfo")
(literal "/private/var/db")
(subpath "/private/var/db/mds"))
(allow file-write*
(literal "/dev/tty")
(literal "/dev/dtracehelper")
(literal "/mds"))
(allow file-ioctl (literal "/dev/dtracehelper"))
(allow file-read-metadata
(literal "/var")
(literal "/tmp")
; symlinks
(literal "@sysconfdir@")
(literal "@sysconfdir@/nix")
(literal "@sysconfdir@/nix/nix.conf")
(literal "/etc/resolv.conf")
(literal "/private/etc/resolv.conf"))
(allow file-read*
(literal "/private@sysconfdir@/nix/nix.conf")
(literal "/private/var/run/resolv.conf"))
; some builders use filehandles other than stdin/stdout
(allow file* (subpath "/dev/fd"))
; allow everything inside TMP
(allow file* process-exec
(subpath (param "_GLOBAL_TMP_DIR"))
(subpath "/private/tmp"))
(allow process-fork)
(allow sysctl-read)
(allow signal (target same-sandbox))
; allow getpwuid (for git and other packages)
(allow mach-lookup
(global-name "com.apple.system.notification_center")
(global-name "com.apple.system.opendirectoryd.libinfo"))
; allow local networking
(allow network* (local ip) (remote unix-socket))