Branch data     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         [ -  + ]:         16 : 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);