| 1 | /**************************************************************************** |
| 2 | ** |
| 3 | ** Copyright (C) 2017 Intel Corporation |
| 4 | ** |
| 5 | ** Permission is hereby granted, free of charge, to any person obtaining a copy |
| 6 | ** of this software and associated documentation files (the "Software"), to deal |
| 7 | ** in the Software without restriction, including without limitation the rights |
| 8 | ** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 9 | ** copies of the Software, and to permit persons to whom the Software is |
| 10 | ** furnished to do so, subject to the following conditions: |
| 11 | ** |
| 12 | ** The above copyright notice and this permission notice shall be included in |
| 13 | ** all copies or substantial portions of the Software. |
| 14 | ** |
| 15 | ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | ** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | ** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 18 | ** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | ** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | ** OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 21 | ** THE SOFTWARE. |
| 22 | ** |
| 23 | ****************************************************************************/ |
| 24 | |
| 25 | #define _BSD_SOURCE 1 |
| 26 | #define _DEFAULT_SOURCE 1 |
| 27 | #ifndef __STDC_LIMIT_MACROS |
| 28 | # define __STDC_LIMIT_MACROS 1 |
| 29 | #endif |
| 30 | |
| 31 | #include "cbor.h" |
| 32 | #include "cborinternal_p.h" |
| 33 | #include "compilersupport_p.h" |
| 34 | #include "utf8_p.h" |
| 35 | |
| 36 | #include <string.h> |
| 37 | |
| 38 | #ifndef CBOR_NO_FLOATING_POINT |
| 39 | # include <float.h> |
| 40 | # include <math.h> |
| 41 | #endif |
| 42 | |
| 43 | |
| 44 | #ifndef CBOR_PARSER_MAX_RECURSIONS |
| 45 | # define CBOR_PARSER_MAX_RECURSIONS 1024 |
| 46 | #endif |
| 47 | |
| 48 | /** |
| 49 | * \addtogroup CborParsing |
| 50 | * @{ |
| 51 | */ |
| 52 | |
| 53 | /** |
| 54 | * \enum CborValidationFlags |
| 55 | * The CborValidationFlags enum contains flags that control the validation of a |
| 56 | * CBOR stream. |
| 57 | * |
| 58 | * \value CborValidateBasic Validates only the syntactic correctedness of the stream. |
| 59 | * \value CborValidateCanonical Validates that the stream is in canonical format, according to |
| 60 | * RFC 7049 section 3.9. |
| 61 | * \value CborValidateStrictMode Performs strict validation, according to RFC 7049 section 3.10. |
| 62 | * \value CborValidateStrictest Attempt to perform the strictest validation we know of. |
| 63 | * |
| 64 | * \value CborValidateShortestIntegrals (Canonical) Validate that integral numbers and lengths are |
| 65 | * enconded in their shortest form possible. |
| 66 | * \value CborValidateShortestFloatingPoint (Canonical) Validate that floating-point numbers are encoded |
| 67 | * in their shortest form possible. |
| 68 | * \value CborValidateShortestNumbers (Canonical) Validate both integral and floating-point numbers |
| 69 | * are in their shortest form possible. |
| 70 | * \value CborValidateNoIndeterminateLength (Canonical) Validate that no string, array or map uses |
| 71 | * indeterminate length encoding. |
| 72 | * \value CborValidateMapIsSorted (Canonical & Strict mode) Validate that map keys appear in |
| 73 | * sorted order. |
| 74 | * \value CborValidateMapKeysAreUnique (Strict mode) Validate that map keys are unique. |
| 75 | * \value CborValidateTagUse (Strict mode) Validate that known tags are used with the |
| 76 | * correct types. This does not validate that the content of |
| 77 | * those types is syntactically correct. For example, this |
| 78 | * option validates that tag 1 (DateTimeString) is used with |
| 79 | * a Text String, but it does not validate that the string is |
| 80 | * a valid date/time representation. |
| 81 | * \value CborValidateUtf8 (Strict mode) Validate that text strings are appropriately |
| 82 | * encoded in UTF-8. |
| 83 | * \value CborValidateMapKeysAreString Validate that all map keys are text strings. |
| 84 | * \value CborValidateNoUndefined Validate that no elements of type "undefined" are present. |
| 85 | * \value CborValidateNoTags Validate that no tags are used. |
| 86 | * \value CborValidateFiniteFloatingPoint Validate that all floating point numbers are finite (no NaN or |
| 87 | * infinities are allowed). |
| 88 | * \value CborValidateCompleteData Validate that the stream is complete and there is no more data |
| 89 | * in the buffer. |
| 90 | * \value CborValidateNoUnknownSimpleTypesSA Validate that all Standards Action simple types are registered |
| 91 | * with IANA. |
| 92 | * \value CborValidateNoUnknownSimpleTypes Validate that all simple types used are registered with IANA. |
| 93 | * \value CborValidateNoUnknownTagsSA Validate that all Standard Actions tags are registered with IANA. |
| 94 | * \value CborValidateNoUnknownTagsSR Validate that all Standard Actions and Specification Required tags |
| 95 | * are registered with IANA (see below for limitations). |
| 96 | * \value CborValidateNoUnkonwnTags Validate that all tags are registered with IANA |
| 97 | * (see below for limitations). |
| 98 | * |
| 99 | * \par Simple type registry |
| 100 | * The CBOR specification requires that registration for use of the first 19 |
| 101 | * simple types must be done by way of Standards Action. The rest of the simple |
| 102 | * types only require a specification. The official list can be obtained from |
| 103 | * https://www.iana.org/assignments/cbor-simple-values/cbor-simple-values.xhtml. |
| 104 | * |
| 105 | * \par |
| 106 | * There are no registered simple types recognized by this release of TinyCBOR |
| 107 | * (beyond those defined by RFC 7049). |
| 108 | * |
| 109 | * \par Tag registry |
| 110 | * The CBOR specification requires that registration for use of the first 23 |
| 111 | * tags must be done by way of Standards Action. The next up to tag 255 only |
| 112 | * require a specification. Finally, all other tags can be registered on a |
| 113 | * first-come-first-serve basis. The official list can be ontained from |
| 114 | * https://www.iana.org/assignments/cbor-tags/cbor-tags.xhtml. |
| 115 | * |
| 116 | * \par |
| 117 | * Given the variability of this list, TinyCBOR cannot recognize all tags |
| 118 | * registered with IANA. Instead, the implementation only recognizes tags |
| 119 | * that are backed by an RFC. |
| 120 | * |
| 121 | * \par |
| 122 | * These are the tags known to the current TinyCBOR release: |
| 123 | <table> |
| 124 | <tr> |
| 125 | <th>Tag</th> |
| 126 | <th>Data Item</th> |
| 127 | <th>Semantics</th> |
| 128 | </tr> |
| 129 | <tr> |
| 130 | <td>0</td> |
| 131 | <td>UTF-8 text string</td> |
| 132 | <td>Standard date/time string</td> |
| 133 | </td> |
| 134 | <tr> |
| 135 | <td>1</td> |
| 136 | <td>integer</td> |
| 137 | <td>Epoch-based date/time</td> |
| 138 | </td> |
| 139 | <tr> |
| 140 | <td>2</td> |
| 141 | <td>byte string</td> |
| 142 | <td>Positive bignum</td> |
| 143 | </td> |
| 144 | <tr> |
| 145 | <td>3</td> |
| 146 | <td>byte string</td> |
| 147 | <td>Negative bignum</td> |
| 148 | </td> |
| 149 | <tr> |
| 150 | <td>4</td> |
| 151 | <td>array</td> |
| 152 | <td>Decimal fraction</td> |
| 153 | </td> |
| 154 | <tr> |
| 155 | <td>5</td> |
| 156 | <td>array</td> |
| 157 | <td>Bigfloat</td> |
| 158 | </td> |
| 159 | <tr> |
| 160 | <td>16</td> |
| 161 | <td>array</td> |
| 162 | <td>COSE Single Recipient Encrypted Data Object (RFC 8152)</td> |
| 163 | </td> |
| 164 | <tr> |
| 165 | <td>17</td> |
| 166 | <td>array</td> |
| 167 | <td>COSE Mac w/o Recipients Object (RFC 8152)</td> |
| 168 | </td> |
| 169 | <tr> |
| 170 | <td>18</td> |
| 171 | <td>array</td> |
| 172 | <td>COSE Single Signer Data Object (RFC 8162)</td> |
| 173 | </td> |
| 174 | <tr> |
| 175 | <td>21</td> |
| 176 | <td>byte string, array, map</td> |
| 177 | <td>Expected conversion to base64url encoding</td> |
| 178 | </td> |
| 179 | <tr> |
| 180 | <td>22</td> |
| 181 | <td>byte string, array, map</td> |
| 182 | <td>Expected conversion to base64 encoding</td> |
| 183 | </td> |
| 184 | <tr> |
| 185 | <td>23</td> |
| 186 | <td>byte string, array, map</td> |
| 187 | <td>Expected conversion to base16 encoding</td> |
| 188 | </td> |
| 189 | <tr> |
| 190 | <td>24</td> |
| 191 | <td>byte string</td> |
| 192 | <td>Encoded CBOR data item</td> |
| 193 | </td> |
| 194 | <tr> |
| 195 | <td>32</td> |
| 196 | <td>UTF-8 text string</td> |
| 197 | <td>URI</td> |
| 198 | </td> |
| 199 | <tr> |
| 200 | <td>33</td> |
| 201 | <td>UTF-8 text string</td> |
| 202 | <td>base64url</td> |
| 203 | </td> |
| 204 | <tr> |
| 205 | <td>34</td> |
| 206 | <td>UTF-8 text string</td> |
| 207 | <td>base64</td> |
| 208 | </td> |
| 209 | <tr> |
| 210 | <td>35</td> |
| 211 | <td>UTF-8 text string</td> |
| 212 | <td>Regular expression</td> |
| 213 | </td> |
| 214 | <tr> |
| 215 | <td>36</td> |
| 216 | <td>UTF-8 text string</td> |
| 217 | <td>MIME message</td> |
| 218 | </td> |
| 219 | <tr> |
| 220 | <td>96</td> |
| 221 | <td>array</td> |
| 222 | <td>COSE Encrypted Data Object (RFC 8152)</td> |
| 223 | </td> |
| 224 | <tr> |
| 225 | <td>97</td> |
| 226 | <td>array</td> |
| 227 | <td>COSE MACed Data Object (RFC 8152)</td> |
| 228 | </td> |
| 229 | <tr> |
| 230 | <td>98</td> |
| 231 | <td>array</td> |
| 232 | <td>COSE Signed Data Object (RFC 8152)</td> |
| 233 | </td> |
| 234 | <tr> |
| 235 | <td>55799</td> |
| 236 | <td>any</td> |
| 237 | <td>Self-describe CBOR</td> |
| 238 | </td> |
| 239 | </table> |
| 240 | */ |
| 241 | |
| 242 | struct KnownTagData { uint32_t tag; uint32_t types; }; |
| 243 | static const struct KnownTagData knownTagData[] = { |
| 244 | { 0, (uint32_t)CborTextStringType }, |
| 245 | { 1, (uint32_t)(CborIntegerType+1) }, |
| 246 | { 2, (uint32_t)CborByteStringType }, |
| 247 | { 3, (uint32_t)CborByteStringType }, |
| 248 | { 4, (uint32_t)CborArrayType }, |
| 249 | { 5, (uint32_t)CborArrayType }, |
| 250 | { 16, (uint32_t)CborArrayType }, |
| 251 | { 17, (uint32_t)CborArrayType }, |
| 252 | { 18, (uint32_t)CborArrayType }, |
| 253 | { 21, (uint32_t)CborByteStringType | ((uint32_t)CborArrayType << 8) | ((uint32_t)CborMapType << 16) }, |
| 254 | { 22, (uint32_t)CborByteStringType | ((uint32_t)CborArrayType << 8) | ((uint32_t)CborMapType << 16) }, |
| 255 | { 23, (uint32_t)CborByteStringType | ((uint32_t)CborArrayType << 8) | ((uint32_t)CborMapType << 16) }, |
| 256 | { 24, (uint32_t)CborByteStringType }, |
| 257 | { 32, (uint32_t)CborTextStringType }, |
| 258 | { 33, (uint32_t)CborTextStringType }, |
| 259 | { 34, (uint32_t)CborTextStringType }, |
| 260 | { 35, (uint32_t)CborTextStringType }, |
| 261 | { 36, (uint32_t)CborTextStringType }, |
| 262 | { 96, (uint32_t)CborArrayType }, |
| 263 | { 97, (uint32_t)CborArrayType }, |
| 264 | { 98, (uint32_t)CborArrayType }, |
| 265 | { 55799, 0U } |
| 266 | }; |
| 267 | |
| 268 | static CborError validate_value(CborValue *it, uint32_t flags, int recursionLeft); |
| 269 | |
| 270 | static inline CborError validate_utf8_string(const void *ptr, size_t n) |
| 271 | { |
| 272 | const uint8_t *buffer = (const uint8_t *)ptr; |
| 273 | const uint8_t * const end = buffer + n; |
| 274 | while (buffer < end) { |
| 275 | uint32_t uc = get_utf8(&buffer, end); |
| 276 | if (uc == ~0U) |
| 277 | return CborErrorInvalidUtf8TextString; |
| 278 | } |
| 279 | return CborNoError; |
| 280 | } |
| 281 | |
| 282 | static inline CborError validate_simple_type(uint8_t simple_type, uint32_t flags) |
| 283 | { |
| 284 | /* At current time, all known simple types are those from RFC 7049, |
| 285 | * which are parsed by the parser into different CBOR types. |
| 286 | * That means that if we've got here, the type is unknown */ |
| 287 | if (simple_type < 32) |
| 288 | return (flags & CborValidateNoUnknownSimpleTypesSA) ? CborErrorUnknownSimpleType : CborNoError; |
| 289 | return (flags & CborValidateNoUnknownSimpleTypes) == CborValidateNoUnknownSimpleTypes ? |
| 290 | CborErrorUnknownSimpleType : CborNoError; |
| 291 | } |
| 292 | |
| 293 | static inline CborError validate_number(const CborValue *it, CborType type, uint32_t flags) |
| 294 | { |
| 295 | CborError err = CborNoError; |
| 296 | const uint8_t *ptr = it->ptr; |
| 297 | size_t bytesUsed, bytesNeeded; |
| 298 | uint64_t value; |
| 299 | |
| 300 | if ((flags & CborValidateShortestIntegrals) == 0) |
| 301 | return err; |
| 302 | if (type >= CborHalfFloatType && type <= CborDoubleType) |
| 303 | return err; /* checked elsewhere */ |
| 304 | |
| 305 | err = _cbor_value_extract_number(&ptr, it->parser->end, &value); |
| 306 | if (err) |
| 307 | return err; |
| 308 | |
| 309 | bytesUsed = (size_t)(ptr - it->ptr - 1); |
| 310 | bytesNeeded = 0; |
| 311 | if (value >= Value8Bit) |
| 312 | ++bytesNeeded; |
| 313 | if (value > 0xffU) |
| 314 | ++bytesNeeded; |
| 315 | if (value > 0xffffU) |
| 316 | bytesNeeded += 2; |
| 317 | if (value > 0xffffffffU) |
| 318 | bytesNeeded += 4; |
| 319 | if (bytesNeeded < bytesUsed) |
| 320 | return CborErrorOverlongEncoding; |
| 321 | return CborNoError; |
| 322 | } |
| 323 | |
| 324 | static inline CborError validate_tag(CborValue *it, CborTag tag, uint32_t flags, int recursionLeft) |
| 325 | { |
| 326 | CborType type = cbor_value_get_type(it); |
| 327 | const size_t knownTagCount = sizeof(knownTagData) / sizeof(knownTagData[0]); |
| 328 | const struct KnownTagData *tagData = knownTagData; |
| 329 | const struct KnownTagData * const knownTagDataEnd = knownTagData + knownTagCount; |
| 330 | |
| 331 | if (!recursionLeft) |
| 332 | return CborErrorNestingTooDeep; |
| 333 | if (flags & CborValidateNoTags) |
| 334 | return CborErrorExcludedType; |
| 335 | |
| 336 | /* find the tag data, if any */ |
| 337 | for ( ; tagData != knownTagDataEnd; ++tagData) { |
| 338 | if (tagData->tag < tag) |
| 339 | continue; |
| 340 | if (tagData->tag > tag) |
| 341 | tagData = NULL; |
| 342 | break; |
| 343 | } |
| 344 | if (tagData == knownTagDataEnd) |
| 345 | tagData = NULL; |
| 346 | |
| 347 | if (flags & CborValidateNoUnknownTags && !tagData) { |
| 348 | /* tag not found */ |
| 349 | if (flags & CborValidateNoUnknownTagsSA && tag < 24) |
| 350 | return CborErrorUnknownTag; |
| 351 | if ((flags & CborValidateNoUnknownTagsSR) == CborValidateNoUnknownTagsSR && tag < 256) |
| 352 | return CborErrorUnknownTag; |
| 353 | if ((flags & CborValidateNoUnknownTags) == CborValidateNoUnknownTags) |
| 354 | return CborErrorUnknownTag; |
| 355 | } |
| 356 | |
| 357 | if (flags & CborValidateTagUse && tagData && tagData->types) { |
| 358 | uint32_t allowedTypes = tagData->types; |
| 359 | |
| 360 | /* correct Integer so it's not zero */ |
| 361 | if (type == CborIntegerType) |
| 362 | type = (CborType)(type + 1); |
| 363 | |
| 364 | while (allowedTypes) { |
| 365 | if ((uint8_t)(allowedTypes & 0xff) == type) |
| 366 | break; |
| 367 | allowedTypes >>= 8; |
| 368 | } |
| 369 | if (!allowedTypes) |
| 370 | return CborErrorInappropriateTagForType; |
| 371 | } |
| 372 | |
| 373 | return validate_value(it, flags, recursionLeft); |
| 374 | } |
| 375 | |
| 376 | #ifndef CBOR_NO_FLOATING_POINT |
| 377 | static inline CborError validate_floating_point(CborValue *it, CborType type, uint32_t flags) |
| 378 | { |
| 379 | CborError err; |
| 380 | int r; |
| 381 | double val; |
| 382 | float valf; |
| 383 | uint16_t valf16; |
| 384 | |
| 385 | if (type != CborDoubleType) { |
| 386 | if (type == CborFloatType) { |
| 387 | err = cbor_value_get_float(it, &valf); |
| 388 | val = valf; |
| 389 | } else { |
| 390 | # ifdef CBOR_NO_HALF_FLOAT_TYPE |
| 391 | (void)valf16; |
| 392 | return CborErrorUnsupportedType; |
| 393 | # else |
| 394 | err = cbor_value_get_half_float(it, &valf16); |
| 395 | val = decode_half(valf16); |
| 396 | # endif |
| 397 | } |
| 398 | } else { |
| 399 | err = cbor_value_get_double(it, &val); |
| 400 | } |
| 401 | cbor_assert(err == CborNoError); /* can't fail */ |
| 402 | |
| 403 | r = fpclassify(val); |
| 404 | if (r == FP_NAN || r == FP_INFINITE) { |
| 405 | if (flags & CborValidateFiniteFloatingPoint) |
| 406 | return CborErrorExcludedValue; |
| 407 | if (flags & CborValidateShortestFloatingPoint) { |
| 408 | if (type == CborDoubleType) |
| 409 | return CborErrorOverlongEncoding; |
| 410 | # ifndef CBOR_NO_HALF_FLOAT_TYPE |
| 411 | if (type == CborFloatType) |
| 412 | return CborErrorOverlongEncoding; |
| 413 | if (r == FP_NAN && valf16 != 0x7e00) |
| 414 | return CborErrorImproperValue; |
| 415 | if (r == FP_INFINITE && valf16 != 0x7c00 && valf16 != 0xfc00) |
| 416 | return CborErrorImproperValue; |
| 417 | # endif |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | if (flags & CborValidateShortestFloatingPoint && type > CborHalfFloatType) { |
| 422 | if (type == CborDoubleType) { |
| 423 | valf = (float)val; |
| 424 | if ((double)valf == val) |
| 425 | return CborErrorOverlongEncoding; |
| 426 | } |
| 427 | # ifndef CBOR_NO_HALF_FLOAT_TYPE |
| 428 | if (type == CborFloatType) { |
| 429 | valf16 = encode_half(valf); |
| 430 | if (valf == decode_half(valf16)) |
| 431 | return CborErrorOverlongEncoding; |
| 432 | } |
| 433 | # endif |
| 434 | } |
| 435 | |
| 436 | return CborNoError; |
| 437 | } |
| 438 | #endif |
| 439 | |
| 440 | static CborError validate_container(CborValue *it, int containerType, uint32_t flags, int recursionLeft) |
| 441 | { |
| 442 | CborError err; |
| 443 | const uint8_t *previous = NULL; |
| 444 | const uint8_t *previous_end = NULL; |
| 445 | |
| 446 | if (!recursionLeft) |
| 447 | return CborErrorNestingTooDeep; |
| 448 | |
| 449 | while (!cbor_value_at_end(it)) { |
| 450 | const uint8_t *current = cbor_value_get_next_byte(it); |
| 451 | |
| 452 | if (containerType == CborMapType) { |
| 453 | if (flags & CborValidateMapKeysAreString) { |
| 454 | CborType type = cbor_value_get_type(it); |
| 455 | if (type == CborTagType) { |
| 456 | /* skip the tags */ |
| 457 | CborValue copy = *it; |
| 458 | err = cbor_value_skip_tag(©); |
| 459 | if (err) |
| 460 | return err; |
| 461 | type = cbor_value_get_type(©); |
| 462 | } |
| 463 | if (type != CborTextStringType) |
| 464 | return CborErrorMapKeyNotString; |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | err = validate_value(it, flags, recursionLeft); |
| 469 | if (err) |
| 470 | return err; |
| 471 | |
| 472 | if (containerType != CborMapType) |
| 473 | continue; |
| 474 | |
| 475 | if (flags & CborValidateMapIsSorted) { |
| 476 | if (previous) { |
| 477 | uint64_t len1, len2; |
| 478 | const uint8_t *ptr; |
| 479 | |
| 480 | /* extract the two lengths */ |
| 481 | ptr = previous; |
| 482 | _cbor_value_extract_number(&ptr, it->parser->end, &len1); |
| 483 | ptr = current; |
| 484 | _cbor_value_extract_number(&ptr, it->parser->end, &len2); |
| 485 | |
| 486 | if (len1 > len2) |
| 487 | return CborErrorMapNotSorted; |
| 488 | if (len1 == len2) { |
| 489 | size_t bytelen1 = (size_t)(previous_end - previous); |
| 490 | size_t bytelen2 = (size_t)(it->ptr - current); |
| 491 | int r = memcmp(previous, current, bytelen1 <= bytelen2 ? bytelen1 : bytelen2); |
| 492 | |
| 493 | if (r == 0 && bytelen1 != bytelen2) |
| 494 | r = bytelen1 < bytelen2 ? -1 : +1; |
| 495 | if (r > 0) |
| 496 | return CborErrorMapNotSorted; |
| 497 | if (r == 0 && (flags & CborValidateMapKeysAreUnique) == CborValidateMapKeysAreUnique) |
| 498 | return CborErrorMapKeysNotUnique; |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | previous = current; |
| 503 | previous_end = it->ptr; |
| 504 | } |
| 505 | |
| 506 | /* map: that was the key, so get the value */ |
| 507 | err = validate_value(it, flags, recursionLeft); |
| 508 | if (err) |
| 509 | return err; |
| 510 | } |
| 511 | return CborNoError; |
| 512 | } |
| 513 | |
| 514 | static CborError validate_value(CborValue *it, uint32_t flags, int recursionLeft) |
| 515 | { |
| 516 | CborError err; |
| 517 | CborType type = cbor_value_get_type(it); |
| 518 | |
| 519 | if (cbor_value_is_length_known(it)) { |
| 520 | err = validate_number(it, type, flags); |
| 521 | if (err) |
| 522 | return err; |
| 523 | } else { |
| 524 | if (flags & CborValidateNoIndeterminateLength) |
| 525 | return CborErrorUnknownLength; |
| 526 | } |
| 527 | |
| 528 | switch (type) { |
| 529 | case CborArrayType: |
| 530 | case CborMapType: { |
| 531 | /* recursive type */ |
| 532 | CborValue recursed; |
| 533 | err = cbor_value_enter_container(it, &recursed); |
| 534 | if (!err) |
| 535 | err = validate_container(&recursed, type, flags, recursionLeft - 1); |
| 536 | if (err) { |
| 537 | it->ptr = recursed.ptr; |
| 538 | return err; |
| 539 | } |
| 540 | err = cbor_value_leave_container(it, &recursed); |
| 541 | if (err) |
| 542 | return err; |
| 543 | return CborNoError; |
| 544 | } |
| 545 | |
| 546 | case CborIntegerType: { |
| 547 | uint64_t val; |
| 548 | err = cbor_value_get_raw_integer(it, &val); |
| 549 | cbor_assert(err == CborNoError); /* can't fail */ |
| 550 | |
| 551 | break; |
| 552 | } |
| 553 | |
| 554 | case CborByteStringType: |
| 555 | case CborTextStringType: { |
| 556 | size_t n = 0; |
| 557 | const void *ptr; |
| 558 | |
| 559 | err = _cbor_value_prepare_string_iteration(it); |
| 560 | if (err) |
| 561 | return err; |
| 562 | |
| 563 | while (1) { |
| 564 | err = validate_number(it, type, flags); |
| 565 | if (err) |
| 566 | return err; |
| 567 | |
| 568 | err = _cbor_value_get_string_chunk(it, &ptr, &n, it); |
| 569 | if (err) |
| 570 | return err; |
| 571 | if (!ptr) |
| 572 | break; |
| 573 | |
| 574 | if (type == CborTextStringType && flags & CborValidateUtf8) { |
| 575 | err = validate_utf8_string(ptr, n); |
| 576 | if (err) |
| 577 | return err; |
| 578 | } |
| 579 | } |
| 580 | |
| 581 | return CborNoError; |
| 582 | } |
| 583 | |
| 584 | case CborTagType: { |
| 585 | CborTag tag; |
| 586 | err = cbor_value_get_tag(it, &tag); |
| 587 | cbor_assert(err == CborNoError); /* can't fail */ |
| 588 | |
| 589 | err = cbor_value_advance_fixed(it); |
| 590 | if (err) |
| 591 | return err; |
| 592 | err = validate_tag(it, tag, flags, recursionLeft - 1); |
| 593 | if (err) |
| 594 | return err; |
| 595 | |
| 596 | return CborNoError; |
| 597 | } |
| 598 | |
| 599 | case CborSimpleType: { |
| 600 | uint8_t simple_type; |
| 601 | err = cbor_value_get_simple_type(it, &simple_type); |
| 602 | cbor_assert(err == CborNoError); /* can't fail */ |
| 603 | err = validate_simple_type(simple_type, flags); |
| 604 | if (err) |
| 605 | return err; |
| 606 | break; |
| 607 | } |
| 608 | |
| 609 | case CborNullType: |
| 610 | case CborBooleanType: |
| 611 | break; |
| 612 | |
| 613 | case CborUndefinedType: |
| 614 | if (flags & CborValidateNoUndefined) |
| 615 | return CborErrorExcludedType; |
| 616 | break; |
| 617 | |
| 618 | case CborHalfFloatType: |
| 619 | case CborFloatType: |
| 620 | case CborDoubleType: { |
| 621 | #ifdef CBOR_NO_FLOATING_POINT |
| 622 | return CborErrorUnsupportedType; |
| 623 | #else |
| 624 | err = validate_floating_point(it, type, flags); |
| 625 | if (err) |
| 626 | return err; |
| 627 | break; |
| 628 | #endif /* !CBOR_NO_FLOATING_POINT */ |
| 629 | } |
| 630 | |
| 631 | case CborInvalidType: |
| 632 | return CborErrorUnknownType; |
| 633 | } |
| 634 | |
| 635 | err = cbor_value_advance_fixed(it); |
| 636 | return err; |
| 637 | } |
| 638 | |
| 639 | /** |
| 640 | * Performs a full validation, controlled by the \a flags options, of the CBOR |
| 641 | * stream pointed by \a it and returns the error it found. If no error was |
| 642 | * found, it returns CborNoError and the application can iterate over the items |
| 643 | * with certainty that no errors will appear during parsing. |
| 644 | * |
| 645 | * If \a flags is CborValidateBasic, the result should be the same as |
| 646 | * cbor_value_validate_basic(). |
| 647 | * |
| 648 | * This function has the same timing and memory requirements as |
| 649 | * cbor_value_advance() and cbor_value_validate_basic(). |
| 650 | * |
| 651 | * \sa CborValidationFlags, cbor_value_validate_basic(), cbor_value_advance() |
| 652 | */ |
| 653 | CborError cbor_value_validate(const CborValue *it, uint32_t flags) |
| 654 | { |
| 655 | CborValue value = *it; |
| 656 | CborError err = validate_value(&value, flags, CBOR_PARSER_MAX_RECURSIONS); |
| 657 | if (err) |
| 658 | return err; |
| 659 | if (flags & CborValidateCompleteData && it->ptr != it->parser->end) |
| 660 | return CborErrorGarbageAtEnd; |
| 661 | return CborNoError; |
| 662 | } |
| 663 | |
| 664 | /** |
| 665 | * @} |
| 666 | */ |