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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2023 Red Hat GmbH
* Author: Alice Frosi <afrosi@redhat.com>
*/
#ifndef SCMP_PROFILE_H_
#define SCMP_PROFILE_H_
#include <linux/limits.h>
#include <stdint.h>
#include <unistd.h>
#include "parson.h"
#include "util.h"
#include "cooker.h"
#include "gluten.h"
#define STRING_MAX 2000
#define COMMENT_MAX 1000
/* TODO define it in a common place */
#define SYSCALL_MAX 512
#define MAX_SUB_ARCHES 3
#define check_JSON_status(status) \
do { \
if (status == JSONFailure) \
die("failing parsing JSON value"); \
} while (0)
/*
* Definition for the OCI Seccomp Specification:
* https://github.com/opencontainers/runtime-spec/blob/main/config-linux.md#seccomp
*/
extern const char *scmp_act_str[];
enum scmp_act_type {
ACT_KILLTHREAD,
ACT_TRAP,
ACT_ERRNO,
ACT_TRACE,
ACT_ALLOW,
ACT_LOG,
ACT_NOTIFY,
};
// Define operators for syscall arguments in Seccomp
extern const char *scmp_op_str[];
enum scmp_op_type {
OP_NO_CHECK,
OP_NOTEQUAL,
OP_LESSTHAN,
OP_LESSEQUAL,
OP_EQUALTO,
OP_GREATEREQUAL,
OP_GREATERTHAN,
OP_MASKEDEQUAL,
};
// Arg used for matching specific syscall arguments in Seccomp
struct scmp_arg {
bool set;
uint32_t index;
uint64_t value;
uint64_t valueTwo;
enum scmp_op_type op;
};
extern const char *arch_str[];
enum arch_type {
ARCH_NATIVE = 0,
ARCH_X86,
ARCH_X86_64,
ARCH_X32,
ARCH_ARM,
ARCH_AARCH64,
ARCH_MIPS,
ARCH_MIPS64,
ARCH_MIPS64N2,
ARCH_MIPSEL,
ARCH_MIPSEL6,
ARCH_MIPSEL6N32,
ARCH_PPC,
ARCH_PPC64,
ARCH_PPC64LE,
ARCH_S390,
ARCH_S390X,
ARCH_PARISC,
ARCH_PARISC6,
ARCH_RISCV64,
ARCH_MAX = ARCH_RISCV64,
};
// Architecture is used to represent a specific architecture
// and its sub-architectures
struct architecture {
enum arch_type arch;
enum arch_type subArches[MAX_SUB_ARCHES];
};
enum caps_type {
CAP_CHOWN = 0,
CAP_DAC_OVERRIDE = 1,
CAP_DAC_READ_SEARCH = 2,
CAP_FOWNER = 3,
CAP_FSETID = 4,
CAP_KILL = 5,
CAP_SETGID = 6,
CAP_SETUID = 7,
CAP_SETPCAP = 8,
CAP_LINUX_IMMUTABLE = 9,
CAP_NET_BIND_SERVICE = 10,
CAP_NET_BROADCAST = 11,
CAP_NET_ADMIN = 12,
CAP_NET_RAW = 13,
CAP_IPC_LOCK = 14,
CAP_IPC_OWNER = 15,
CAP_SYS_MODULE = 16,
CAP_SYS_RAWIO = 17,
CAP_SYS_CHROOT = 18,
CAP_SYS_PTRACE = 19,
CAP_SYS_PACCT = 20,
CAP_SYS_ADMIN = 21,
CAP_SYS_BOOT = 22,
CAP_SYS_NICE = 23,
CAP_SYS_RESOURCE = 24,
CAP_SYS_TIME = 25,
CAP_SYS_TTY_CONFIG = 26,
CAP_MKNOD = 27,
CAP_LEASE = 28,
CAP_AUDIT_WRITE = 29,
CAP_AUDIT_CONTROL = 30,
CAP_SETFCAP = 31,
CAP_MAC_OVERRIDE = 32,
CAP_MAC_ADMIN = 33,
CAP_SYSLOG = 34,
CAP_WAKE_ALARM = 35,
CAP_BLOCK_SUSPEND = 36,
CAP_AUDIT_READ = 37,
CAP_PERFMON = 38,
CAP_BPF = 39,
CAP_CHECKPOINT_RESTORE = 40,
CAP_LAST_CAP = 41,
CAPS_MAX = CAP_LAST_CAP,
};
// Filter is used to conditionally apply Seccomp rules
struct scmp_filter {
enum caps_type caps[CAPS_MAX];
enum arch_type arches[ARCH_MAX];
};
extern const char *scmp_filter_str[];
enum scmp_filter_type {
SCMP_FILT_FLAG_TSYNC,
SCMP_FILT_FLAG_LOG,
SCMP_FILT_FLAG_SPEC_ALLOW,
SCMP_FILT_FLAG_WAIT_KILLABLE_RECV,
SCMP_FILT_FLAG_MAX = SCMP_FILT_FLAG_WAIT_KILLABLE_RECV,
};
// Syscall is used to match a group of syscalls in Seccomp
struct syscall {
/* here we use a single syscall per entry*/
char names[STRING_MAX];
enum scmp_act_type action;
struct scmp_arg args[6];
char comment[COMMENT_MAX];
enum scmp_filter_type includes;
enum scmp_filter_type excludes;
char err[STRING_MAX];
};
// Seccomp represents the config for a seccomp profile for syscall restriction.
struct seccomp {
enum scmp_act_type default_action;
char defaultErrno[STRING_MAX];
// Architectures is kept to maintain backward compatibility with the old
// seccomp profile.
enum arch_type architectures[ARCH_MAX];
struct architecture archMap[ARCH_MAX];
struct syscall syscalls[SYSCALL_MAX];
enum scmp_filter_type flags[SCMP_FILT_FLAG_MAX];
char listenerPath[PATH_MAX];
char listenerMetadata[PATH_MAX];
};
void scmp_profile_init();
void scmp_profile_notify(const char *name);
void scmp_profile_add_check(int index, union value v, union value mask,
enum op_cmp_type cmp);
void scmp_profile_write(const char *file);
void scmp_profile_flush_args();
#endif
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