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| processContentCandidate | |
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| ensureOidsAreLoaded | |
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| extract | |
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| getSigninTime | |
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| resolveHashAlgorithm | |
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| getNumericOid | |
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| walkAsn1Tree | |
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| decodeConstructedChildren | |
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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | /** |
| 5 | * SPDX-FileCopyrightText: 2020-2024 LibreCode coop and contributors |
| 6 | * SPDX-License-Identifier: AGPL-3.0-or-later |
| 7 | */ |
| 8 | |
| 9 | namespace OCA\Libresign\Handler\SignEngine; |
| 10 | |
| 11 | use OCA\Libresign\Vendor\phpseclib4\File\ASN1; |
| 12 | use OCA\Libresign\Vendor\phpseclib4\File\ASN1\Constructed; |
| 13 | use OCA\Libresign\Vendor\phpseclib4\File\ASN1\Element; |
| 14 | use OCA\Libresign\Vendor\phpseclib4\File\ASN1\Types\BaseType; |
| 15 | use OCA\Libresign\Vendor\phpseclib4\Math\BigInteger; |
| 16 | |
| 17 | class TSA { |
| 18 | private static bool $areOidsInitialized = false; |
| 19 | private static array $asn1DecodingCache = []; |
| 20 | |
| 21 | private const array CERTIFICATE_ATTRIBUTE_OIDS = [ |
| 22 | '2.5.4.3' => 'commonName', |
| 23 | '2.5.4.6' => 'countryName', |
| 24 | '2.5.4.10' => 'organizationName', |
| 25 | '1.2.840.113549.1.9.1' => 'emailAddress', |
| 26 | ]; |
| 27 | |
| 28 | private const array TIMESTAMP_OIDS = [ |
| 29 | 'TIME_STAMP_TOKEN' => '1.2.840.113549.1.9.16.2.14', |
| 30 | 'SIGNING_TIME' => '1.2.840.113549.1.9.5', |
| 31 | 'TST_INFO' => '1.2.840.113549.1.9.16.1.4', |
| 32 | ]; |
| 33 | |
| 34 | private static ?array $timestampInfoStructure = null; |
| 35 | private const int CACHE_SIZE_LIMIT = 50; |
| 36 | |
| 37 | public function __construct() { |
| 38 | $this->ensureOidsAreLoaded(); |
| 39 | } |
| 40 | |
| 41 | private function processContentCandidate($content, ?string &$cmsDer): array { |
| 42 | try { |
| 43 | if ($content instanceof Element && $content->value !== '') { |
| 44 | return $this->decodeWithCache($cmsDer = $content->value); |
| 45 | } elseif ($content instanceof Constructed) { |
| 46 | return $this->decodeWithCache($cmsDer = $content->getEncoded()); |
| 47 | } elseif (is_string($content)) { |
| 48 | return $this->decodeWithCache($cmsDer = $content); |
| 49 | } elseif (is_array($content)) { |
| 50 | return $content; |
| 51 | } |
| 52 | } catch (\Throwable $e) { |
| 53 | error_log('TSA content processing failed: ' . $e->getMessage()); |
| 54 | } |
| 55 | return []; |
| 56 | } |
| 57 | |
| 58 | private function ensureOidsAreLoaded(): void { |
| 59 | if (self::$areOidsInitialized) { |
| 60 | return; |
| 61 | } |
| 62 | |
| 63 | ASN1::loadOIDs([ |
| 64 | 'md2' => '1.2.840.113549.2.2', |
| 65 | 'md5' => '1.2.840.113549.2.5', |
| 66 | 'id-sha1' => '1.3.14.3.2.26', |
| 67 | 'id-sha256' => '2.16.840.1.101.3.4.2.1', |
| 68 | 'id-sha384' => '2.16.840.1.101.3.4.2.2', |
| 69 | 'id-sha512' => '2.16.840.1.101.3.4.2.3', |
| 70 | 'timestampToken' => self::TIMESTAMP_OIDS['TIME_STAMP_TOKEN'], |
| 71 | 'signingTime' => self::TIMESTAMP_OIDS['SIGNING_TIME'], |
| 72 | 'tstInfo' => self::TIMESTAMP_OIDS['TST_INFO'], |
| 73 | ]); |
| 74 | |
| 75 | self::$areOidsInitialized = true; |
| 76 | } |
| 77 | |
| 78 | private function convertDerToPkcs7Pem(string $derData): string { |
| 79 | return "-----BEGIN PKCS7-----\n" . chunk_split(base64_encode($derData), 64, "\n") . "-----END PKCS7-----\n"; |
| 80 | } |
| 81 | |
| 82 | private function extractTimestampAuthorityName($timestampElement): array { |
| 83 | if (!$timestampElement instanceof Element || $timestampElement->value === '') { |
| 84 | return []; |
| 85 | } |
| 86 | |
| 87 | try { |
| 88 | $decoded = $this->decodeWithCache($timestampElement->value); |
| 89 | return ($decoded[0] ?? null) ? $this->extractCertificateHints([$decoded[0]]) : []; |
| 90 | } catch (\Throwable) { |
| 91 | return []; |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | private function buildTimestampInfoStructure(): array { |
| 96 | return [ |
| 97 | 'type' => ASN1::TYPE_SEQUENCE, |
| 98 | 'children' => [ |
| 99 | 'version' => ['type' => ASN1::TYPE_INTEGER], |
| 100 | 'policy' => ['type' => ASN1::TYPE_OBJECT_IDENTIFIER], |
| 101 | 'messageImprint' => [ |
| 102 | 'type' => ASN1::TYPE_SEQUENCE, |
| 103 | 'children' => [ |
| 104 | 'hashAlgorithm' => [ |
| 105 | 'type' => ASN1::TYPE_SEQUENCE, |
| 106 | 'children' => [ |
| 107 | 'algorithm' => ['type' => ASN1::TYPE_OBJECT_IDENTIFIER], |
| 108 | 'parameters' => ['optional' => true, 'type' => ASN1::TYPE_ANY], |
| 109 | ], |
| 110 | ], |
| 111 | 'hashedMessage' => ['type' => ASN1::TYPE_OCTET_STRING], |
| 112 | ], |
| 113 | ], |
| 114 | 'serialNumber' => ['type' => ASN1::TYPE_INTEGER], |
| 115 | 'genTime' => ['type' => ASN1::TYPE_GENERALIZED_TIME], |
| 116 | 'accuracy' => [ |
| 117 | 'constant' => 0, |
| 118 | 'implicit' => true, |
| 119 | 'optional' => true, |
| 120 | 'type' => ASN1::TYPE_SEQUENCE, |
| 121 | 'children' => [ |
| 122 | 'seconds' => ['constant' => 0, 'implicit' => true, 'optional' => true, 'type' => ASN1::TYPE_INTEGER], |
| 123 | 'millis' => ['constant' => 1, 'implicit' => true, 'optional' => true, 'type' => ASN1::TYPE_INTEGER], |
| 124 | 'micros' => ['constant' => 2, 'implicit' => true, 'optional' => true, 'type' => ASN1::TYPE_INTEGER], |
| 125 | ], |
| 126 | ], |
| 127 | 'ordering' => ['type' => ASN1::TYPE_BOOLEAN, 'optional' => true], |
| 128 | 'nonce' => ['type' => ASN1::TYPE_INTEGER, 'optional' => true], |
| 129 | 'tsa' => ['constant' => 0, 'optional' => true, 'implicit' => true, 'type' => ASN1::TYPE_ANY], |
| 130 | 'extensions' => ['constant' => 1, 'optional' => true, 'implicit' => true, 'type' => ASN1::TYPE_ANY], |
| 131 | ], |
| 132 | ]; |
| 133 | } |
| 134 | |
| 135 | public function extract(array $root): array { |
| 136 | if (isset($root['type'])) { |
| 137 | $root = [$root]; |
| 138 | } |
| 139 | |
| 140 | $cmsDer = null; |
| 141 | $tstInfoOctets = null; |
| 142 | $cnHints = []; |
| 143 | |
| 144 | $values = $this->getAttributeValuesSetAfterOID($root, self::TIMESTAMP_OIDS['TIME_STAMP_TOKEN']); |
| 145 | if ($values) { |
| 146 | foreach ($values as $candidate) { |
| 147 | if (!isset($candidate['content'])) { |
| 148 | continue; |
| 149 | } |
| 150 | |
| 151 | $subtree = $this->processContentCandidate($candidate['content'], $cmsDer); |
| 152 | |
| 153 | if (!empty($subtree)) { |
| 154 | $tstInfoOctets = $this->findContentAfterOID($subtree, self::TIMESTAMP_OIDS['TST_INFO'], ASN1::TYPE_OCTET_STRING); |
| 155 | $cnHints = $this->extractCertificateHints($subtree); |
| 156 | if ($tstInfoOctets) { |
| 157 | break; // Found what we need, exit early |
| 158 | } |
| 159 | } |
| 160 | } |
| 161 | } |
| 162 | if (!isset($tstInfoOctets)) { |
| 163 | $tstInfoOctets = $this->findContentAfterOID($root, self::TIMESTAMP_OIDS['TST_INFO'], ASN1::TYPE_OCTET_STRING); |
| 164 | $cnHints = $this->extractCertificateHints($root); |
| 165 | } |
| 166 | |
| 167 | $tsa = ['genTime' => null, 'policy' => null, 'serialNumber' => null, 'cnHints' => []]; |
| 168 | |
| 169 | if ($tstInfoOctets) { |
| 170 | try { |
| 171 | $decoded = $this->decodeWithCache($tstInfoOctets); |
| 172 | $tstNode = $decoded[0] ?? null; |
| 173 | |
| 174 | $tst = null; |
| 175 | if ($tstNode && ($tstNode['type'] ?? null) === ASN1::TYPE_SEQUENCE) { |
| 176 | $mappedTst = ASN1::map($tstNode, self::$timestampInfoStructure ??= $this->buildTimestampInfoStructure()); |
| 177 | $tst = $mappedTst instanceof Constructed ? $mappedTst->toArray(true) : null; |
| 178 | if (!is_array($tst)) { |
| 179 | $tst = $this->parseTstInfoFallback($tstInfoOctets); |
| 180 | } |
| 181 | } |
| 182 | } catch (\Throwable) { |
| 183 | $tst = $this->parseTstInfoFallback($tstInfoOctets); |
| 184 | } |
| 185 | |
| 186 | if (is_array($tst)) { |
| 187 | $tsa['genTime'] = $tst['genTime'] ?? null; |
| 188 | $policyOid = isset($tst['policy']) && is_string($tst['policy']) |
| 189 | ? ASN1::getOIDFromName($tst['policy']) |
| 190 | : null; |
| 191 | $tsa['policy'] = $policyOid; |
| 192 | $tsa['policyName'] = $this->resolveTsaPolicyName($policyOid); |
| 193 | $tsa['serialNumber'] = $this->bigToString($tst['serialNumber'] ?? null); |
| 194 | |
| 195 | if (!empty($tst['messageImprint'])) { |
| 196 | $algOid = $tst['messageImprint']['hashAlgorithm']['algorithm'] ?? null; |
| 197 | |
| 198 | $friendlyName = $this->resolveHashAlgorithm($algOid); |
| 199 | |
| 200 | $numericOid = $this->getNumericOid($algOid); |
| 201 | |
| 202 | $tsa['hashAlgorithm'] = $friendlyName; |
| 203 | $tsa['hashAlgorithmOID'] = $numericOid; |
| 204 | |
| 205 | $hashed = $tst['messageImprint']['hashedMessage'] ?? null; |
| 206 | if (is_string($hashed)) { |
| 207 | $tsa['hashedMessageHex'] = strtoupper(bin2hex($hashed)); |
| 208 | } |
| 209 | } |
| 210 | if (!empty($tst['accuracy'])) { |
| 211 | $acc = $tst['accuracy']; |
| 212 | $tsa['accuracy'] = [ |
| 213 | 'seconds' => isset($acc['seconds']) ? (int)$this->bigToString($acc['seconds']) : null, |
| 214 | 'millis' => isset($acc['millis']) ? (int)$this->bigToString($acc['millis']) : null, |
| 215 | 'micros' => isset($acc['micros']) ? (int)$this->bigToString($acc['micros']) : null, |
| 216 | ]; |
| 217 | } |
| 218 | if (array_key_exists('ordering', $tst)) { |
| 219 | $tsa['ordering'] = (bool)$tst['ordering']; |
| 220 | } |
| 221 | if (isset($tst['nonce'])) { |
| 222 | $tsa['nonce'] = $this->bigToString($tst['nonce']); |
| 223 | } |
| 224 | if (isset($tst['tsa'])) { |
| 225 | $tsa['tsa'] = $this->extractTimestampAuthorityName($tst['tsa']); |
| 226 | } |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | if ($cmsDer) { |
| 231 | $pem = $this->convertDerToPkcs7Pem($cmsDer); |
| 232 | $tsaPemCerts = []; |
| 233 | if (@openssl_pkcs7_read($pem, $tsaPemCerts)) { |
| 234 | $tsaChain = []; |
| 235 | foreach ($tsaPemCerts as $idx => $pemCert) { |
| 236 | $parsed = openssl_x509_parse($pemCert); |
| 237 | if ($parsed) { |
| 238 | $tsaChain[$idx] = $parsed; |
| 239 | } |
| 240 | } |
| 241 | $tsa['chain'] = array_values($tsaChain); |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | $tsa['cnHints'] = $cnHints; |
| 246 | $tsa['displayName'] = $this->generateDistinguishedNames($cnHints); |
| 247 | try { |
| 248 | $tsa['genTime'] = $tsa['genTime'] ? new \DateTime($tsa['genTime']) : null; |
| 249 | } catch (\Exception) { |
| 250 | $tsa['genTime'] = null; |
| 251 | } |
| 252 | |
| 253 | return $tsa; |
| 254 | } |
| 255 | |
| 256 | public function getSigninTime($root): ?\DateTime { |
| 257 | $foundSigningTimeOid = false; |
| 258 | if (is_array($root) && isset($root['type'])) { |
| 259 | $root = [$root]; |
| 260 | } |
| 261 | |
| 262 | foreach ($this->walkAsn1Tree(is_array($root) ? $root : []) as $node) { |
| 263 | if (($node['type'] ?? null) === ASN1::TYPE_OBJECT_IDENTIFIER |
| 264 | && in_array($this->getNodeContent($node), [self::TIMESTAMP_OIDS['SIGNING_TIME'], 'signingTime', 'id-signingTime'], true)) { |
| 265 | $foundSigningTimeOid = true; |
| 266 | continue; |
| 267 | } |
| 268 | |
| 269 | if (!$foundSigningTimeOid || !in_array($node['type'] ?? null, [ASN1::TYPE_UTC_TIME, ASN1::TYPE_GENERALIZED_TIME], true)) { |
| 270 | continue; |
| 271 | } |
| 272 | |
| 273 | $signingTime = $this->getNodeContent($node); |
| 274 | if (!is_string($signingTime) || $signingTime === '') { |
| 275 | return null; |
| 276 | } |
| 277 | |
| 278 | try { |
| 279 | return new \DateTime($signingTime); |
| 280 | } catch (\Exception) { |
| 281 | return null; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | return null; |
| 286 | } |
| 287 | |
| 288 | private function parseTstInfoFallback(string $tstInfoOctets): ?array { |
| 289 | try { |
| 290 | $nodes = $this->decodeWithCache($tstInfoOctets); |
| 291 | $root = $nodes[0] ?? null; |
| 292 | if (!$root || ($root['type'] ?? null) !== ASN1::TYPE_SEQUENCE) { |
| 293 | return null; |
| 294 | } |
| 295 | $children = is_array($root['content'] ?? null) |
| 296 | ? $root['content'] |
| 297 | : (($root['content'] ?? null) instanceof Constructed ? $this->decodeConstructedChildren($root['content']) : []); |
| 298 | } catch (\Throwable) { |
| 299 | return null; |
| 300 | } |
| 301 | $out = ['policy' => null, 'serialNumber' => null, 'genTime' => null]; |
| 302 | |
| 303 | $seenPolicy = false; |
| 304 | $seenMsgImprint = false; |
| 305 | $seenSerial = false; |
| 306 | |
| 307 | foreach ($children as $child) { |
| 308 | $t = $child['type'] ?? null; |
| 309 | |
| 310 | $nodeContent = $this->getNodeContent($child); |
| 311 | if (!$seenPolicy && $t === ASN1::TYPE_OBJECT_IDENTIFIER && is_string($nodeContent)) { |
| 312 | $out['policy'] = $nodeContent; |
| 313 | $seenPolicy = true; |
| 314 | continue; |
| 315 | } |
| 316 | $messageImprintParts = is_array($child['content'] ?? null) |
| 317 | ? $child['content'] |
| 318 | : (($child['content'] ?? null) instanceof Constructed ? $this->decodeConstructedChildren($child['content']) : []); |
| 319 | if (!$seenMsgImprint && $t === ASN1::TYPE_SEQUENCE && $messageImprintParts !== []) { |
| 320 | $hasOID = false; |
| 321 | $hasOctet = false; |
| 322 | foreach ($messageImprintParts as $miPart) { |
| 323 | if (($miPart['type'] ?? null) === ASN1::TYPE_SEQUENCE) { |
| 324 | $algorithmParts = is_array($miPart['content'] ?? null) |
| 325 | ? $miPart['content'] |
| 326 | : (($miPart['content'] ?? null) instanceof Constructed ? $this->decodeConstructedChildren($miPart['content']) : []); |
| 327 | foreach ($algorithmParts as $algPart) { |
| 328 | if (($algPart['type'] ?? null) === ASN1::TYPE_OBJECT_IDENTIFIER) { |
| 329 | $hasOID = true; |
| 330 | } |
| 331 | } |
| 332 | } |
| 333 | if (($miPart['type'] ?? null) === ASN1::TYPE_OCTET_STRING) { |
| 334 | $hasOctet = true; |
| 335 | } |
| 336 | } |
| 337 | if ($hasOID && $hasOctet) { |
| 338 | $seenMsgImprint = true; |
| 339 | continue; |
| 340 | } |
| 341 | } |
| 342 | if ($seenMsgImprint && !$seenSerial && $t === ASN1::TYPE_INTEGER) { |
| 343 | $out['serialNumber'] = $this->bigToString($child['content'] ?? null); |
| 344 | $seenSerial = true; |
| 345 | continue; |
| 346 | } |
| 347 | if ($t === ASN1::TYPE_GENERALIZED_TIME || $t === ASN1::TYPE_UTC_TIME) { |
| 348 | if (is_string($nodeContent)) { |
| 349 | $out['genTime'] = $nodeContent; |
| 350 | } |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | if (!$out['genTime']) { |
| 355 | foreach ($this->walkAsn1Tree([$root]) as $n) { |
| 356 | $tt = $n['type'] ?? null; |
| 357 | $nodeContent = $this->getNodeContent($n); |
| 358 | if (($tt === ASN1::TYPE_GENERALIZED_TIME || $tt === ASN1::TYPE_UTC_TIME) && is_string($nodeContent)) { |
| 359 | $out['genTime'] = $nodeContent; |
| 360 | break; |
| 361 | } |
| 362 | } |
| 363 | } |
| 364 | return $out; |
| 365 | } |
| 366 | |
| 367 | private function getAttributeValuesSetAfterOID(array $tree, string $oid): ?array { |
| 368 | $seen = false; |
| 369 | foreach ($this->walkAsn1Tree($tree) as $n) { |
| 370 | if (($n['type'] ?? null) === ASN1::TYPE_OBJECT_IDENTIFIER && $this->matchesOid($this->getNodeContent($n), $oid)) { |
| 371 | $seen = true; |
| 372 | continue; |
| 373 | } |
| 374 | if ($seen && ($n['type'] ?? null) === ASN1::TYPE_SET) { |
| 375 | if (is_array($n['content'] ?? null)) { |
| 376 | return $n['content']; |
| 377 | } |
| 378 | if (($n['content'] ?? null) instanceof Constructed) { |
| 379 | return $this->decodeConstructedChildren($n['content']); |
| 380 | } |
| 381 | } |
| 382 | } |
| 383 | return null; |
| 384 | } |
| 385 | |
| 386 | private function findContentAfterOID(array $tree, string $oid, int $expectedType): ?string { |
| 387 | $seen = false; |
| 388 | foreach ($this->walkAsn1Tree($tree) as $n) { |
| 389 | if (($n['type'] ?? null) === ASN1::TYPE_OBJECT_IDENTIFIER |
| 390 | && $this->matchesOid($this->getNodeContent($n), $oid) |
| 391 | ) { |
| 392 | $seen = true; |
| 393 | continue; |
| 394 | } |
| 395 | if ($seen |
| 396 | && ($n['type'] ?? null) === $expectedType |
| 397 | && is_string($this->getNodeContent($n)) |
| 398 | ) { |
| 399 | return $this->getNodeContent($n); |
| 400 | } |
| 401 | } |
| 402 | return null; |
| 403 | } |
| 404 | |
| 405 | private function matchesOid(mixed $candidate, string $expected): bool { |
| 406 | return is_string($candidate) |
| 407 | && ASN1::getOIDFromName($candidate) === ASN1::getOIDFromName($expected); |
| 408 | } |
| 409 | |
| 410 | private function extractCertificateHints(array $asn1Tree): array { |
| 411 | $certificateHints = []; |
| 412 | $currentAttributeOid = null; |
| 413 | |
| 414 | foreach ($this->walkAsn1Tree($asn1Tree) as $node) { |
| 415 | $nodeContent = $this->getNodeContent($node); |
| 416 | $nodeOid = is_string($nodeContent) ? ASN1::getOIDFromName($nodeContent) : null; |
| 417 | if (($node['type'] ?? null) === ASN1::TYPE_OBJECT_IDENTIFIER |
| 418 | && $nodeOid !== null && isset(self::CERTIFICATE_ATTRIBUTE_OIDS[$nodeOid])) { |
| 419 | $currentAttributeOid = $nodeOid; |
| 420 | continue; |
| 421 | } |
| 422 | |
| 423 | if ($currentAttributeOid !== null |
| 424 | && is_string($nodeContent) |
| 425 | && $this->isStringValidUtf8($nodeContent) |
| 426 | ) { |
| 427 | $certificateHints[self::CERTIFICATE_ATTRIBUTE_OIDS[$currentAttributeOid]] = $nodeContent; |
| 428 | $currentAttributeOid = null; |
| 429 | } |
| 430 | } |
| 431 | return $certificateHints; |
| 432 | } |
| 433 | |
| 434 | private function isStringValidUtf8(string $text): bool { |
| 435 | return mb_check_encoding($text, 'UTF-8') |
| 436 | && preg_match('/[\P{C}]/u', $text) |
| 437 | && !preg_match('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]/', $text); |
| 438 | } |
| 439 | |
| 440 | private function generateDistinguishedNames(array $hints): string { |
| 441 | $mapping = [ |
| 442 | 'countryName' => 'C', |
| 443 | 'stateOrProvinceName' => 'ST', |
| 444 | 'localityName' => 'L', |
| 445 | 'organizationName' => 'O', |
| 446 | 'organizationalUnitName' => 'OU', |
| 447 | 'commonName' => 'CN', |
| 448 | 'description' => 'description', |
| 449 | 'emailAddress' => 'emailAddress', |
| 450 | ]; |
| 451 | |
| 452 | $parts = array_filter( |
| 453 | array_map( |
| 454 | fn ($field) => empty($hints[$field]) |
| 455 | ? null |
| 456 | : $mapping[$field] . '=' . addcslashes((string)$hints[$field], '/+<>"#;'), |
| 457 | array_keys($mapping) |
| 458 | ) |
| 459 | ); |
| 460 | |
| 461 | return '/' . implode('/', $parts); |
| 462 | } |
| 463 | |
| 464 | private function bigToString($v): ?string { |
| 465 | return match (true) { |
| 466 | $v === null => null, |
| 467 | $v instanceof BigInteger => $v->toString(), |
| 468 | is_int($v) => (string)$v, |
| 469 | is_string($v) => ctype_digit($v) ? $v : null, |
| 470 | is_array($v) && isset($v['content']) => $this->bigToString($v['content']), |
| 471 | default => null, |
| 472 | }; |
| 473 | } |
| 474 | |
| 475 | private function resolveHashAlgorithm(?string $oid): ?string { |
| 476 | return match ($oid) { |
| 477 | null => null, |
| 478 | '1.3.14.3.2.26' => 'SHA-1', |
| 479 | '2.16.840.1.101.3.4.2.4' => 'SHA-224', |
| 480 | '2.16.840.1.101.3.4.2.1' => 'SHA-256', |
| 481 | '2.16.840.1.101.3.4.2.2' => 'SHA-384', |
| 482 | '2.16.840.1.101.3.4.2.3' => 'SHA-512', |
| 483 | '1.2.840.113549.2.5' => 'MD5', |
| 484 | '1.2.840.113549.2.2' => 'MD2', |
| 485 | 'id-sha1', 'sha1withrsaencryption', 'ecdsa-with-sha1', 'id-dsa-with-sha1' => 'SHA-1', |
| 486 | 'id-sha224', 'sha224withrsaencryption', 'ecdsa-with-sha224', 'id-dsa-with-sha224' => 'SHA-224', |
| 487 | 'id-sha256', 'sha256withrsaencryption', 'ecdsa-with-sha256', 'id-dsa-with-sha256' => 'SHA-256', |
| 488 | 'id-sha384', 'sha384withrsaencryption', 'ecdsa-with-sha384' => 'SHA-384', |
| 489 | 'id-sha512', 'sha512withrsaencryption', 'ecdsa-with-sha512' => 'SHA-512', |
| 490 | 'md2', 'md2withrsaencryption' => 'MD2', |
| 491 | 'md5', 'md5withrsaencryption' => 'MD5', |
| 492 | default => $oid, // Return original if not mapped |
| 493 | }; |
| 494 | } |
| 495 | |
| 496 | private function getNumericOid(?string $oid): ?string { |
| 497 | if (!$oid || preg_match('/^\d+(\.\d+)*$/', $oid)) { |
| 498 | return $oid; |
| 499 | } |
| 500 | |
| 501 | return match ($oid) { |
| 502 | 'id-sha1', 'sha1withrsaencryption', 'ecdsa-with-sha1', 'id-dsa-with-sha1' => '1.3.14.3.2.26', |
| 503 | 'id-sha224', 'sha224withrsaencryption', 'ecdsa-with-sha224', 'id-dsa-with-sha224' => '2.16.840.1.101.3.4.2.4', |
| 504 | 'id-sha256', 'sha256withrsaencryption', 'ecdsa-with-sha256', 'id-dsa-with-sha256' => '2.16.840.1.101.3.4.2.1', |
| 505 | 'id-sha384', 'sha384withrsaencryption', 'ecdsa-with-sha384' => '2.16.840.1.101.3.4.2.2', |
| 506 | 'id-sha512', 'sha512withrsaencryption', 'ecdsa-with-sha512' => '2.16.840.1.101.3.4.2.3', |
| 507 | 'md2', 'md2withrsaencryption' => '1.2.840.113549.2.2', |
| 508 | 'md5', 'md5withrsaencryption' => '1.2.840.113549.2.5', |
| 509 | default => $oid, // Return original if not mapped |
| 510 | }; |
| 511 | } |
| 512 | |
| 513 | private function resolveTsaPolicyName(?string $policyOid): ?string { |
| 514 | if (!$policyOid) { |
| 515 | return null; |
| 516 | } |
| 517 | |
| 518 | $resolved = ASN1::getNameFromOID($policyOid); |
| 519 | if ($resolved && $resolved !== $policyOid) { |
| 520 | return $resolved; |
| 521 | } |
| 522 | |
| 523 | return match ($policyOid) { |
| 524 | '1.2.3.4.1' => 'FreeTSA Policy', |
| 525 | '1.3.6.1.4.1.601.10.3.1' => 'VeriSign TSA Policy', |
| 526 | '1.3.6.1.4.1.311.3.2.1' => 'Microsoft TSA Policy', |
| 527 | '2.16.840.1.114412.7.1' => 'DigiCert TSA Policy', |
| 528 | '1.3.6.1.4.1.8302.3.1' => 'Comodo TSA Policy', |
| 529 | '2.16.840.1.113733.1.7.23.3' => 'Symantec TSA Policy', |
| 530 | default => null, |
| 531 | }; |
| 532 | } |
| 533 | |
| 534 | private function decodeWithCache(string $asn1Data): array { |
| 535 | $cacheKey = hash('xxh3', $asn1Data); |
| 536 | |
| 537 | if (isset(self::$asn1DecodingCache[$cacheKey])) { |
| 538 | return self::$asn1DecodingCache[$cacheKey]; |
| 539 | } |
| 540 | |
| 541 | $decodedResult = ASN1::decodeBER($asn1Data); |
| 542 | if (isset($decodedResult['type'])) { |
| 543 | $decodedResult = [$decodedResult]; |
| 544 | } |
| 545 | if ($decodedResult === null) { |
| 546 | $decodedResult = []; |
| 547 | } |
| 548 | |
| 549 | if (count(self::$asn1DecodingCache) >= self::CACHE_SIZE_LIMIT) { |
| 550 | array_shift(self::$asn1DecodingCache); |
| 551 | } |
| 552 | |
| 553 | self::$asn1DecodingCache[$cacheKey] = $decodedResult; |
| 554 | return $decodedResult; |
| 555 | } |
| 556 | |
| 557 | private function getNodeContent(array $node): mixed { |
| 558 | $content = $node['content'] ?? null; |
| 559 | if (!$content instanceof BaseType) { |
| 560 | return $content; |
| 561 | } |
| 562 | |
| 563 | return ASN1::convertToPrimitive($content); |
| 564 | } |
| 565 | |
| 566 | public static function clearCache(): void { |
| 567 | self::$asn1DecodingCache = []; |
| 568 | } |
| 569 | |
| 570 | private function walkAsn1Tree(array $nodes): \Generator { |
| 571 | $processingStack = $nodes; |
| 572 | |
| 573 | while (!empty($processingStack)) { |
| 574 | $currentNode = array_shift($processingStack); |
| 575 | if (!is_array($currentNode)) { |
| 576 | continue; |
| 577 | } |
| 578 | yield $currentNode; |
| 579 | |
| 580 | foreach (['content', 'children'] as $childrenKey) { |
| 581 | if (isset($currentNode[$childrenKey]) && is_array($currentNode[$childrenKey])) { |
| 582 | array_unshift($processingStack, ...$currentNode[$childrenKey]); |
| 583 | } elseif ($childrenKey === 'content' && ($currentNode[$childrenKey] ?? null) instanceof Constructed) { |
| 584 | array_unshift($processingStack, ...$this->decodeConstructedChildren($currentNode[$childrenKey])); |
| 585 | } |
| 586 | } |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | /** @return list<array> */ |
| 591 | private function decodeConstructedChildren(Constructed $node): array { |
| 592 | $encoded = $node->getEncodedWithoutHeader(); |
| 593 | $children = []; |
| 594 | $offset = 0; |
| 595 | |
| 596 | while ($offset < strlen($encoded)) { |
| 597 | try { |
| 598 | $child = ASN1::decodeBER(substr($encoded, $offset)); |
| 599 | } catch (\Throwable) { |
| 600 | break; |
| 601 | } |
| 602 | |
| 603 | $headerLength = $child['headerlength'] ?? null; |
| 604 | $length = $child['length'] ?? null; |
| 605 | if (!is_int($headerLength) || !is_int($length)) { |
| 606 | break; |
| 607 | } |
| 608 | |
| 609 | $children[] = $child; |
| 610 | $offset += $headerLength + $length; |
| 611 | } |
| 612 | |
| 613 | return $children; |
| 614 | } |
| 615 | } |