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-rw-r--r--src/shared/seccomp-util.h98
1 files changed, 98 insertions, 0 deletions
diff --git a/src/shared/seccomp-util.h b/src/shared/seccomp-util.h
new file mode 100644
index 0000000..d8a36c4
--- /dev/null
+++ b/src/shared/seccomp-util.h
@@ -0,0 +1,98 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+#include <seccomp.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "set.h"
+
+const char* seccomp_arch_to_string(uint32_t c);
+int seccomp_arch_from_string(const char *n, uint32_t *ret);
+
+int seccomp_init_for_arch(scmp_filter_ctx *ret, uint32_t arch, uint32_t default_action);
+
+bool is_seccomp_available(void);
+
+typedef struct SyscallFilterSet {
+ const char *name;
+ const char *help;
+ const char *value;
+} SyscallFilterSet;
+
+enum {
+ /* Please leave DEFAULT first, but sort the rest alphabetically */
+ SYSCALL_FILTER_SET_DEFAULT,
+ SYSCALL_FILTER_SET_AIO,
+ SYSCALL_FILTER_SET_BASIC_IO,
+ SYSCALL_FILTER_SET_CHOWN,
+ SYSCALL_FILTER_SET_CLOCK,
+ SYSCALL_FILTER_SET_CPU_EMULATION,
+ SYSCALL_FILTER_SET_DEBUG,
+ SYSCALL_FILTER_SET_FILE_SYSTEM,
+ SYSCALL_FILTER_SET_IO_EVENT,
+ SYSCALL_FILTER_SET_IPC,
+ SYSCALL_FILTER_SET_KEYRING,
+ SYSCALL_FILTER_SET_MEMLOCK,
+ SYSCALL_FILTER_SET_MODULE,
+ SYSCALL_FILTER_SET_MOUNT,
+ SYSCALL_FILTER_SET_NETWORK_IO,
+ SYSCALL_FILTER_SET_OBSOLETE,
+ SYSCALL_FILTER_SET_PRIVILEGED,
+ SYSCALL_FILTER_SET_PROCESS,
+ SYSCALL_FILTER_SET_RAW_IO,
+ SYSCALL_FILTER_SET_REBOOT,
+ SYSCALL_FILTER_SET_RESOURCES,
+ SYSCALL_FILTER_SET_SETUID,
+ SYSCALL_FILTER_SET_SIGNAL,
+ SYSCALL_FILTER_SET_SWAP,
+ SYSCALL_FILTER_SET_SYNC,
+ SYSCALL_FILTER_SET_SYSTEM_SERVICE,
+ SYSCALL_FILTER_SET_TIMER,
+ _SYSCALL_FILTER_SET_MAX
+};
+
+extern const SyscallFilterSet syscall_filter_sets[];
+
+const SyscallFilterSet *syscall_filter_set_find(const char *name);
+
+int seccomp_filter_set_add(Hashmap *s, bool b, const SyscallFilterSet *set);
+
+int seccomp_add_syscall_filter_item(scmp_filter_ctx *ctx, const char *name, uint32_t action, char **exclude, bool log_missing);
+
+int seccomp_load_syscall_filter_set(uint32_t default_action, const SyscallFilterSet *set, uint32_t action, bool log_missing);
+int seccomp_load_syscall_filter_set_raw(uint32_t default_action, Hashmap* set, uint32_t action, bool log_missing);
+
+typedef enum SeccompParseFlags {
+ SECCOMP_PARSE_INVERT = 1 << 0,
+ SECCOMP_PARSE_WHITELIST = 1 << 1,
+ SECCOMP_PARSE_LOG = 1 << 2,
+ SECCOMP_PARSE_PERMISSIVE = 1 << 3,
+} SeccompParseFlags;
+
+int seccomp_parse_syscall_filter_full(
+ const char *name, int errno_num, Hashmap *filter, SeccompParseFlags flags,
+ const char *unit, const char *filename, unsigned line);
+
+static inline int seccomp_parse_syscall_filter(const char *name, int errno_num, Hashmap *filter, SeccompParseFlags flags) {
+ return seccomp_parse_syscall_filter_full(name, errno_num, filter, flags, NULL, NULL, 0);
+}
+
+int seccomp_restrict_archs(Set *archs);
+int seccomp_restrict_namespaces(unsigned long retain);
+int seccomp_protect_sysctl(void);
+int seccomp_restrict_address_families(Set *address_families, bool whitelist);
+int seccomp_restrict_realtime(void);
+int seccomp_memory_deny_write_execute(void);
+int seccomp_lock_personality(unsigned long personality);
+
+extern const uint32_t seccomp_local_archs[];
+
+#define SECCOMP_FOREACH_LOCAL_ARCH(arch) \
+ for (unsigned _i = ({ (arch) = seccomp_local_archs[0]; 0; }); \
+ seccomp_local_archs[_i] != (uint32_t) -1; \
+ (arch) = seccomp_local_archs[++_i])
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(scmp_filter_ctx, seccomp_release);
+
+int parse_syscall_archs(char **l, Set **archs);