Line data    Source code

       1             : /* SPDX-License-Identifier: LGPL-2.1+ */
       2             : #pragma once
       3             : 
       4             : #include <seccomp.h>
       5             : #include <stdbool.h>
       6             : #include <stdint.h>
       7             : 
       8             : #include "set.h"
       9             : 
      10             : const char* seccomp_arch_to_string(uint32_t c);
      11             : int seccomp_arch_from_string(const char *n, uint32_t *ret);
      12             : 
      13             : int seccomp_init_for_arch(scmp_filter_ctx *ret, uint32_t arch, uint32_t default_action);
      14             : 
      15             : bool is_seccomp_available(void);
      16             : 
      17             : typedef struct SyscallFilterSet {
      18             :         const char *name;
      19             :         const char *help;
      20             :         const char *value;
      21             : } SyscallFilterSet;
      22             : 
      23             : enum {
      24             :         /* Please leave DEFAULT first, but sort the rest alphabetically */
      25             :         SYSCALL_FILTER_SET_DEFAULT,
      26             :         SYSCALL_FILTER_SET_AIO,
      27             :         SYSCALL_FILTER_SET_BASIC_IO,
      28             :         SYSCALL_FILTER_SET_CHOWN,
      29             :         SYSCALL_FILTER_SET_CLOCK,
      30             :         SYSCALL_FILTER_SET_CPU_EMULATION,
      31             :         SYSCALL_FILTER_SET_DEBUG,
      32             :         SYSCALL_FILTER_SET_FILE_SYSTEM,
      33             :         SYSCALL_FILTER_SET_IO_EVENT,
      34             :         SYSCALL_FILTER_SET_IPC,
      35             :         SYSCALL_FILTER_SET_KEYRING,
      36             :         SYSCALL_FILTER_SET_MEMLOCK,
      37             :         SYSCALL_FILTER_SET_MODULE,
      38             :         SYSCALL_FILTER_SET_MOUNT,
      39             :         SYSCALL_FILTER_SET_NETWORK_IO,
      40             :         SYSCALL_FILTER_SET_OBSOLETE,
      41             :         SYSCALL_FILTER_SET_PRIVILEGED,
      42             :         SYSCALL_FILTER_SET_PROCESS,
      43             :         SYSCALL_FILTER_SET_RAW_IO,
      44             :         SYSCALL_FILTER_SET_REBOOT,
      45             :         SYSCALL_FILTER_SET_RESOURCES,
      46             :         SYSCALL_FILTER_SET_SETUID,
      47             :         SYSCALL_FILTER_SET_SIGNAL,
      48             :         SYSCALL_FILTER_SET_SWAP,
      49             :         SYSCALL_FILTER_SET_SYNC,
      50             :         SYSCALL_FILTER_SET_SYSTEM_SERVICE,
      51             :         SYSCALL_FILTER_SET_TIMER,
      52             :         _SYSCALL_FILTER_SET_MAX
      53             : };
      54             : 
      55             : extern const SyscallFilterSet syscall_filter_sets[];
      56             : 
      57             : const SyscallFilterSet *syscall_filter_set_find(const char *name);
      58             : 
      59             : int seccomp_filter_set_add(Hashmap *s, bool b, const SyscallFilterSet *set);
      60             : 
      61             : int seccomp_add_syscall_filter_item(scmp_filter_ctx *ctx, const char *name, uint32_t action, char **exclude, bool log_missing);
      62             : 
      63             : int seccomp_load_syscall_filter_set(uint32_t default_action, const SyscallFilterSet *set, uint32_t action, bool log_missing);
      64             : int seccomp_load_syscall_filter_set_raw(uint32_t default_action, Hashmap* set, uint32_t action, bool log_missing);
      65             : 
      66             : typedef enum SeccompParseFlags {
      67             :         SECCOMP_PARSE_INVERT     = 1 << 0,
      68             :         SECCOMP_PARSE_WHITELIST  = 1 << 1,
      69             :         SECCOMP_PARSE_LOG        = 1 << 2,
      70             :         SECCOMP_PARSE_PERMISSIVE = 1 << 3,
      71             : } SeccompParseFlags;
      72             : 
      73             : int seccomp_parse_syscall_filter(
      74             :                 const char *name,
      75             :                 int errno_num,
      76             :                 Hashmap *filter,
      77             :                 SeccompParseFlags flags,
      78             :                 const char *unit,
      79             :                 const char *filename, unsigned line);
      80             : 
      81             : int seccomp_restrict_archs(Set *archs);
      82             : int seccomp_restrict_namespaces(unsigned long retain);
      83             : int seccomp_protect_sysctl(void);
      84             : int seccomp_restrict_address_families(Set *address_families, bool whitelist);
      85             : int seccomp_restrict_realtime(void);
      86             : int seccomp_memory_deny_write_execute(void);
      87             : int seccomp_lock_personality(unsigned long personality);
      88             : int seccomp_protect_hostname(void);
      89             : int seccomp_restrict_suid_sgid(void);
      90             : 
      91             : extern const uint32_t seccomp_local_archs[];
      92             : 
      93             : #define SECCOMP_FOREACH_LOCAL_ARCH(arch) \
      94             :         for (unsigned _i = ({ (arch) = seccomp_local_archs[0]; 0; });   \
      95             :              seccomp_local_archs[_i] != (uint32_t) -1;                  \
      96             :              (arch) = seccomp_local_archs[++_i])
      97             : 
      98             : /* EACCES: does not have the CAP_SYS_ADMIN or no_new_privs == 1
      99             :  * ENOMEM: out of memory, failed to allocate space for a libseccomp structure, or would exceed a defined constant
     100             :  * EFAULT: addresses passed as args (by libseccomp) are invalid */
     101             : #define ERRNO_IS_SECCOMP_FATAL(r)                                       \
     102             :         IN_SET(abs(r), EPERM, EACCES, ENOMEM, EFAULT)
     103             : 
     104           4 : DEFINE_TRIVIAL_CLEANUP_FUNC(scmp_filter_ctx, seccomp_release);
     105             : 
     106             : int parse_syscall_archs(char **l, Set **archs);
     107             : 
     108             : uint32_t scmp_act_kill_process(void);