1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371
extern crate libc; /* * seccomp actions */ #[allow(non_camel_case_types)] pub type scmp_filter_ctx = libc::c_void; /** * Error retern value */ pub const __NR_SCMP_ERROR: libc::c_int = -1; /** * Kill the calling thread */ pub const SCMP_ACT_KILL: u32 = 0x00000000; /** * Kill the calling process */ pub const SCMP_ACT_KILL_PROCESS: u32 = 0x80000000; /** * Throw a SIGSYS signal */ pub const SCMP_ACT_TRAP: u32 = 0x00030000; /** * Return the specified error code */ #[allow(non_snake_case)] pub fn SCMP_ACT_ERRNO(x: u32) -> u32 { 0x00050000 | ((x) & 0x0000ffff) } /** * Notify a tracing process with the specified value */ #[allow(non_snake_case)] pub fn SCMP_ACT_TRACE(x: u32) -> u32 { 0x7ff00000 | ((x) & 0x0000ffff) } /** * Allow the syscall to be executed */ pub const SCMP_ACT_ALLOW: u32 = 0x7fff0000; /** * Filter attributes */ #[allow(non_camel_case_types)] #[derive(Debug,Clone,Copy)] #[repr(C)] pub enum scmp_filter_attr { _SCMP_FLTATR_MIN, SCMP_FLTATR_ACT_DEFAULT, /** default filter action */ SCMP_FLTATR_ACT_BADARCH, /** bad architecture action */ SCMP_FLTATR_CTL_NNP, /** set NO_NEW_PRIVS on filter load */ _SCMP_FLTATR_MAX, } /** * Comparison operators */ #[allow(non_camel_case_types)] #[derive(Debug,Clone,Copy)] #[repr(C)] pub enum scmp_compare { _SCMP_CMP_MIN = 0, SCMP_CMP_NE = 1, /** not equal */ SCMP_CMP_LT = 2, /** less than */ SCMP_CMP_LE = 3, /** less than or equal */ SCMP_CMP_EQ = 4, /** equal */ SCMP_CMP_GE = 5, /** greater than or equal */ SCMP_CMP_GT = 6, /** greater than */ SCMP_CMP_MASKED_EQ = 7, /** masked equality */ _SCMP_CMP_MAX, } /** * Architecutres */ #[allow(non_camel_case_types)] #[derive(Debug,Clone,Copy)] #[repr(C)] pub enum scmp_arch { SCMP_ARCH_NATIVE = 0x0, SCMP_ARCH_X86 = 0x40000003, SCMP_ARCH_X86_64 = 0xc000003e, SCMP_ARCH_X32 = 0x4000003e, SCMP_ARCH_ARM = 0x40000028, SCMP_ARCH_AARCH64 = 0xc00000b7, SCMP_ARCH_MIPS = 0x8, SCMP_ARCH_MIPS64 = 0x80000008, SCMP_ARCH_MIPS64N32 = 0xa0000008, SCMP_ARCH_MIPSEL = 0x40000008, SCMP_ARCH_MIPSEL64 = 0xc0000008, SCMP_ARCH_MIPSEL64N32 = 0xe0000008, SCMP_ARCH_PPC = 0x14, SCMP_ARCH_PPC64 = 0x80000015, SCMP_ARCH_PPC64LE = 0xc0000015, SCMP_ARCH_S390 = 0x16, SCMP_ARCH_S390X = 0x80000016, } /** * Argument datum */ #[allow(non_camel_case_types)] pub type scmp_datum_t = u64; /** * Argument / Value comparison definition */ #[derive(Debug)] #[repr(C)] pub struct scmp_arg_cmp { pub arg: libc::c_uint, /** argument number, starting at 0 */ pub op: scmp_compare, /** the comparison op, e.g. SCMP_CMP_* */ pub datum_a: scmp_datum_t, pub datum_b: scmp_datum_t, } #[link(name = "seccomp")] extern { /** * Initialize the filter state * * @param def_action the default filter action * * This function initializes the internal seccomp filter state and should * be called before any other functions in this library to ensure the filter * state is initialized. Returns a filter context on success, NULL on failure. * */ pub fn seccomp_init(def_action: u32) -> *mut scmp_filter_ctx; /** * Reset the filter state * * @param ctx the filter context * @param def_action the default filter action * * This function resets the given seccomp filter state and ensures the * filter state is reinitialized. This function does not reset any seccomp * filters already loaded into the kernel. Returns zero on success, negative * values on failure. * */ pub fn seccomp_reset(ctx: *mut scmp_filter_ctx, def_action: u32) -> libc::c_int; /** * Destroys the filter state and releases any resources * * @param ctx the filter context * * This functions destroys the given seccomp filter state and releases any * resources, including memory, associated with the filter state. This * function does not reset any seccomp filters already loaded into the kernel. * The filter context can no longer be used after calling this function. * */ pub fn seccomp_release(ctx: *mut scmp_filter_ctx); /** * Adds an architecture to the filter * @param ctx the filter context * @param arch_token the architecture token, e.g. SCMP_ARCH_* * * This function adds a new architecture to the given seccomp filter context. * Any new rules added after this function successfully returns will be added * to this architecture but existing rules will not be added to this * architecture. If the architecture token is SCMP_ARCH_NATIVE then the native * architecture will be assumed. Returns zero on success, negative values on * failure. * */ pub fn seccomp_arch_add(ctx: *mut scmp_filter_ctx, arch_token: u32) -> libc::c_int; /** * Removes an architecture from the filter * @param ctx the filter context * @param arch_token the architecture token, e.g. SCMP_ARCH_* * * This function removes an architecture from the given seccomp filter context. * If the architecture token is SCMP_ARCH_NATIVE then the native architecture * will be assumed. Returns zero on success, negative values on failure. * */ pub fn seccomp_arch_remove(ctx: *mut scmp_filter_ctx, arch_token: u32)-> libc::c_int; /** * Loads the filter into the kernel * * @param ctx the filter context * * This function loads the given seccomp filter context into the kernel. If * the filter was loaded correctly, the kernel will be enforcing the filter * when this function returns. Returns zero on success, negative values on * error. * */ pub fn seccomp_load(ctx: *const scmp_filter_ctx) -> libc::c_int; /** * Get the value of a filter attribute * * @param ctx the filter context * @param attr the filter attribute name * @param value the filter attribute value * * This function fetches the value of the given attribute name and returns it * via @value. Returns zero on success, negative values on failure. * */ pub fn seccomp_attr_get(ctx: *const scmp_filter_ctx, attr: scmp_filter_attr, value: *mut u32) -> libc::c_int; /** * Set the value of a filter attribute * * @param ctx the filter context * @param attr the filter attribute name * @param value the filter attribute value * * This function sets the value of the given attribute. Returns zero on * success, negative values on failure. * */ pub fn seccomp_attr_set(ctx: *mut scmp_filter_ctx, attr: scmp_filter_attr, value: u32) -> libc::c_int; /** * Resolve a syscall name to a number * @param name the syscall name * * Resolve the given syscall name to the syscall number. Returns the syscall * number on success, including negative pseudo syscall numbers (e.g. __PNR_*); * returns __NR_SCMP_ERROR on failure. * */ pub fn seccomp_syscall_resolve_name(name: *const libc::c_char) -> libc::c_int; /** * Set the priority of a given syscall * * @param ctx the filter context * @param syscall the syscall number * @param priority priority value, higher value == higher priority * * This function sets the priority of the given syscall; this value is used * when generating the seccomp filter code such that higher priority syscalls * will incur less filter code overhead than the lower priority syscalls in the * filter. Returns zero on success, negative values on failure. * */ pub fn seccomp_syscall_priority(ctx: *mut scmp_filter_ctx, syscall: libc::c_int, priority: u8) -> libc::c_int; /** * Add a new rule to the filter * * @param ctx the filter context * @param action the filter action * @param syscall the syscall number * @param arg_cnt the number of argument filters in the argument filter chain * @param ... scmp_arg_cmp structs (use of SCMP_ARG_CMP() recommended) * * This function adds a series of new argument/value checks to the seccomp * filter for the given syscall; multiple argument/value checks can be * specified and they will be chained together (AND'd together) in the filter. * If the specified rule needs to be adjusted due to architecture specifics it * will be adjusted without notification. Returns zero on success, negative * values on failure. * */ pub fn seccomp_rule_add(ctx: *mut scmp_filter_ctx, action: u32, syscall: libc::c_int, arg_cnt: libc::c_uint, ...) -> libc::c_int; /** * Add a new rule to the filter * * @param ctx the filter context * @param action the filter action * @param syscall the syscall number * @param arg_cnt the number of elements in the arg_array parameter * @param arg_array array of scmp_arg_cmp structs * * This function adds a series of new argument/value checks to the seccomp * filter for the given syscall; multiple argument/value checks can be * specified and they will be chained together (AND'd together) in the filter. * If the specified rule needs to be adjusted due to architecture specifics it * will be adjusted without notification. Returns zero on success, negative * values on failure. * */ pub fn seccomp_rule_add_array(ctx: *mut scmp_filter_ctx, action: u32, syscall: libc::c_int, arg_cnt: libc::c_uint, arg_array: *const scmp_arg_cmp) -> libc::c_int; /** * Add a new rule to the filter * * @param ctx the filter context * @param action the filter action * @param syscall the syscall number * @param arg_cnt the number of argument filters in the argument filter chain * @param ... scmp_arg_cmp structs (use of SCMP_ARG_CMP() recommended) * * This function adds a series of new argument/value checks to the seccomp * filter for the given syscall; multiple argument/value checks can be * specified and they will be chained together (AND'd together) in the filter. * If the specified rule can not be represented on the architecture the * function will fail. Returns zero on success, negative values on failure. * */ pub fn seccomp_rule_add_exact(ctx: *mut scmp_filter_ctx, action: u32, syscall: libc::c_int, arg_cnt: libc::c_uint, ...) -> libc::c_int; /** * Add a new rule to the filter * * @param ctx the filter context * @param action the filter action * @param syscall the syscall number * @param arg_cnt the number of elements in the arg_array parameter * @param arg_array array of scmp_arg_cmp structs * * This function adds a series of new argument/value checks to the seccomp * filter for the given syscall; multiple argument/value checks can be * specified and they will be chained together (AND'd together) in the filter. * If the specified rule can not be represented on the architecture the * function will fail. Returns zero on success, negative values on failure. * */ pub fn seccomp_rule_add_exact_array(ctx: *mut scmp_filter_ctx, action: u32, syscall: libc::c_int, arg_cnt: libc::c_uint, arg_array: *const scmp_arg_cmp) -> libc::c_int; /** * Generate seccomp Pseudo Filter Code (PFC) and export it to a file * * @param ctx the filter context * @param fd the destination fd * * This function generates seccomp Pseudo Filter Code (PFC) and writes it to * the given fd. Returns zero on success, negative values on failure. * */ pub fn seccomp_export_pfc(ctx: *const scmp_filter_ctx, fd: libc::c_int) -> libc::c_int; /** * Generate seccomp Berkley Packet Filter (BPF) code and export it to a file * * @param ctx the filter context * @param fd the destination fd * * This function generates seccomp Berkley Packer Filter (BPF) code and writes * it to the given fd. Returns zero on success, negative values on failure. * */ pub fn seccomp_export_bpf(ctx: *const scmp_filter_ctx, fd: libc::c_int) -> libc::c_int; } #[test] fn does_it_even_work() { unsafe { let context = seccomp_init(SCMP_ACT_ALLOW); let comparator = scmp_arg_cmp { arg: 0, op: scmp_compare::SCMP_CMP_EQ, datum_a: 1000, datum_b: 0, }; assert!(seccomp_rule_add(context, SCMP_ACT_KILL, 105, 1, comparator) == 0); assert!(seccomp_load(context) == 0); //assert!(libc::setuid(1000) == 0); } }