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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * @file |
| 5 | * Fiscal action: generate and sign fiscal authorization PDF. |
| 6 | */ |
| 7 | |
| 8 | declare(strict_types=1); |
| 9 | |
| 10 | require_once __DIR__.'/../../../../vendor/autoload.php'; |
| 11 | require_once __DIR__.'/Template.php'; |
| 12 | |
| 13 | use Dompdf\Dompdf; |
| 14 | |
| 15 | /** |
| 16 | * Normalize a tax ID value to compare certificates and form input. |
| 17 | * |
| 18 | * @param string $taxid Input tax ID. |
| 19 | * @return string Normalized tax ID (uppercase, alphanumeric only). |
| 20 | */ |
| 21 | function authorization_normalize_taxid(string $taxid): string |
| 22 | { |
| 23 | $normalized = strtoupper(trim($taxid)); |
| 24 | return preg_replace('/[^A-Z0-9]/', '', $normalized) ?? ''; |
| 25 | } |
| 26 | |
| 27 | /** |
| 28 | * Extract tax ID candidates from certificate subject data. |
| 29 | * |
| 30 | * @param string $certificatePem PEM-encoded certificate. |
| 31 | * @return array<int, string> Distinct normalized tax ID candidates. |
| 32 | */ |
| 33 | function authorization_extract_certificate_taxids(string $certificatePem): array |
| 34 | { |
| 35 | $taxids = []; |
| 36 | $parsed = @openssl_x509_parse($certificatePem); |
| 37 | if (!is_array($parsed)) { |
| 38 | return $taxids; |
| 39 | } |
| 40 | |
| 41 | $values = []; |
| 42 | if (isset($parsed['subject']) && is_array($parsed['subject'])) { |
| 43 | foreach ($parsed['subject'] as $value) { |
| 44 | if (is_string($value)) { |
| 45 | $values[] = $value; |
| 46 | } |
| 47 | } |
| 48 | } |
| 49 | foreach (['name', 'subject', 'issuer'] as $key) { |
| 50 | if (isset($parsed[$key]) && is_string($parsed[$key])) { |
| 51 | $values[] = $parsed[$key]; |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | $pattern = '/([A-Z][0-9]{7}[A-Z0-9]|[0-9]{8}[A-Z])/'; |
| 56 | foreach ($values as $value) { |
| 57 | if (preg_match_all($pattern, strtoupper($value), $matches)) { |
| 58 | foreach ($matches[1] as $candidate) { |
| 59 | $taxids[] = authorization_normalize_taxid($candidate); |
| 60 | } |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | return array_values(array_unique(array_filter($taxids))); |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Read a subject/issuer string field from a parsed certificate section. |
| 69 | * |
| 70 | * @param array<string, mixed> $section Parsed certificate section. |
| 71 | * @param string $key Field key. |
| 72 | * @return string |
| 73 | */ |
| 74 | function authorization_read_dn_string(array $section, string $key): string |
| 75 | { |
| 76 | if (!isset($section[$key])) { |
| 77 | return ''; |
| 78 | } |
| 79 | |
| 80 | $value = $section[$key]; |
| 81 | if (is_string($value)) { |
| 82 | return trim($value); |
| 83 | } |
| 84 | |
| 85 | if (is_array($value)) { |
| 86 | foreach ($value as $item) { |
| 87 | if (is_string($item) && trim($item) !== '') { |
| 88 | return trim($item); |
| 89 | } |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | return ''; |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Build human-readable signer certificate data to embed in the visible PDF HTML. |
| 98 | * |
| 99 | * @param string $certificatePem PEM-encoded certificate. |
| 100 | * @return array<string, string> |
| 101 | */ |
| 102 | function authorization_build_certificate_signature_data(string $certificatePem): array |
| 103 | { |
| 104 | $empty = [ |
| 105 | 'subjectName' => '', |
| 106 | 'subjectTaxId' => '', |
| 107 | 'serialNumber' => '', |
| 108 | 'issuerName' => '', |
| 109 | 'validFrom' => '', |
| 110 | 'validTo' => '', |
| 111 | 'fingerprintSha256' => '', |
| 112 | ]; |
| 113 | |
| 114 | $parsed = @openssl_x509_parse($certificatePem); |
| 115 | if (!is_array($parsed)) { |
| 116 | return $empty; |
| 117 | } |
| 118 | |
| 119 | $subject = isset($parsed['subject']) && is_array($parsed['subject']) ? $parsed['subject'] : []; |
| 120 | $issuer = isset($parsed['issuer']) && is_array($parsed['issuer']) ? $parsed['issuer'] : []; |
| 121 | |
| 122 | $subjectName = authorization_read_dn_string($subject, 'CN'); |
| 123 | if ($subjectName === '') { |
| 124 | $subjectName = authorization_read_dn_string($subject, 'commonName'); |
| 125 | } |
| 126 | if ($subjectName === '') { |
| 127 | $subjectName = trim( |
| 128 | authorization_read_dn_string($subject, 'givenName').' '.authorization_read_dn_string($subject, 'surname') |
| 129 | ); |
| 130 | } |
| 131 | if ($subjectName === '') { |
| 132 | $subjectName = authorization_read_dn_string($subject, 'O'); |
| 133 | } |
| 134 | |
| 135 | $subjectTaxId = authorization_read_dn_string($subject, 'serialNumber'); |
| 136 | if ($subjectTaxId === '') { |
| 137 | $taxids = authorization_extract_certificate_taxids($certificatePem); |
| 138 | $subjectTaxId = isset($taxids[0]) ? (string) $taxids[0] : ''; |
| 139 | } |
| 140 | |
| 141 | $serialNumber = isset($parsed['serialNumberHex']) && is_string($parsed['serialNumberHex']) |
| 142 | ? trim($parsed['serialNumberHex']) |
| 143 | : ''; |
| 144 | if ($serialNumber === '' && isset($parsed['serialNumber'])) { |
| 145 | $serialNumber = is_string($parsed['serialNumber']) |
| 146 | ? trim($parsed['serialNumber']) |
| 147 | : (string) $parsed['serialNumber']; |
| 148 | } |
| 149 | |
| 150 | $issuerName = authorization_read_dn_string($issuer, 'CN'); |
| 151 | if ($issuerName === '') { |
| 152 | $issuerName = authorization_read_dn_string($issuer, 'O'); |
| 153 | } |
| 154 | |
| 155 | $validFromTimestamp = (int) ($parsed['validFrom_time_t'] ?? 0); |
| 156 | $validToTimestamp = (int) ($parsed['validTo_time_t'] ?? 0); |
| 157 | $validFrom = $validFromTimestamp > 0 ? date('c', $validFromTimestamp) : ''; |
| 158 | $validTo = $validToTimestamp > 0 ? date('c', $validToTimestamp) : ''; |
| 159 | |
| 160 | $fingerprintSha256 = @openssl_x509_fingerprint($certificatePem, 'sha256'); |
| 161 | if (!is_string($fingerprintSha256)) { |
| 162 | $fingerprintSha256 = ''; |
| 163 | } |
| 164 | |
| 165 | return [ |
| 166 | 'subjectName' => $subjectName, |
| 167 | 'subjectTaxId' => $subjectTaxId, |
| 168 | 'serialNumber' => $serialNumber, |
| 169 | 'issuerName' => $issuerName, |
| 170 | 'validFrom' => $validFrom, |
| 171 | 'validTo' => $validTo, |
| 172 | 'fingerprintSha256' => strtoupper($fingerprintSha256), |
| 173 | ]; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Parse certificate payload and extract certificate + private key. |
| 178 | * |
| 179 | * @param string $certificateData Raw file content from uploaded certificate. |
| 180 | * @param string $certificatePassword Certificate password. |
| 181 | * @param string|null $certificatePem Output cert PEM. |
| 182 | * @param string|null $privateKeyPem Output private key PEM. |
| 183 | * @param \Psr\Log\LoggerInterface $logger Logger. |
| 184 | * @return int ApplicationError code. |
| 185 | */ |
| 186 | function authorization_extract_certificate_data(string $certificateData, string $certificatePassword, ?string &$certificatePem, ?string &$privateKeyPem, \Psr\Log\LoggerInterface $logger): int |
| 187 | { |
| 188 | $retval = \ApplicationError::Success; |
| 189 | $certificatePem = null; |
| 190 | $privateKeyPem = null; |
| 191 | |
| 192 | $certs = []; |
| 193 | if (@openssl_pkcs12_read($certificateData, $certs, $certificatePassword)) { |
| 194 | $certificatePem = isset($certs['cert']) ? (string) $certs['cert'] : null; |
| 195 | $privateKeyPem = isset($certs['pkey']) ? (string) $certs['pkey'] : null; |
| 196 | if (!$certificatePem || !$privateKeyPem) { |
| 197 | $retval = \ApplicationError::Certificate; |
| 198 | $logger->error("Uploaded PKCS12 certificate does not contain cert and private key."); |
| 199 | } |
| 200 | } |
| 201 | else { |
| 202 | $certResource = @openssl_x509_read($certificateData); |
| 203 | if ($certResource === false) { |
| 204 | $retval = \ApplicationError::Certificate; |
| 205 | $logger->error("Uploaded certificate could not be parsed as PKCS12 or PEM."); |
| 206 | } |
| 207 | |
| 208 | if (success($retval)) { |
| 209 | $exported = ''; |
| 210 | if (!@openssl_x509_export($certResource, $exported)) { |
| 211 | $retval = \ApplicationError::Certificate; |
| 212 | $logger->error("Could not export PEM certificate for signing."); |
| 213 | } |
| 214 | else { |
| 215 | $certificatePem = $exported; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | if (success($retval)) { |
| 220 | $privateKey = @openssl_pkey_get_private($certificateData, $certificatePassword); |
| 221 | if ($privateKey === false) { |
| 222 | $privateKey = @openssl_pkey_get_private($certificateData); |
| 223 | } |
| 224 | if ($privateKey === false) { |
| 225 | $retval = \ApplicationError::Certificate; |
| 226 | $logger->error("Could not extract private key from uploaded PEM certificate."); |
| 227 | } |
| 228 | else { |
| 229 | $keyExported = ''; |
| 230 | if (!@openssl_pkey_export($privateKey, $keyExported, $certificatePassword)) { |
| 231 | if (!@openssl_pkey_export($privateKey, $keyExported)) { |
| 232 | $retval = \ApplicationError::Certificate; |
| 233 | $logger->error("Could not export private key for PDF signature."); |
| 234 | } |
| 235 | } |
| 236 | if (success($retval)) { |
| 237 | $privateKeyPem = $keyExported; |
| 238 | } |
| 239 | } |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | return $retval; |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * Generate signed PDF from HTML content. |
| 248 | * |
| 249 | * @param string $destinationPath Output PDF path. |
| 250 | * @param string $html PDF HTML source. |
| 251 | * @param string $certificatePem Certificate PEM. |
| 252 | * @param string $privateKeyPem Private key PEM. |
| 253 | * @param string $certificatePassword Private key password. |
| 254 | * @param array<string, mixed> $payload Request payload. |
| 255 | * @param \Psr\Log\LoggerInterface $logger Logger. |
| 256 | * @return int ApplicationError code. |
| 257 | */ |
| 258 | function authorization_generate_signed_pdf(string $destinationPath, string $html, string $certificatePem, string $privateKeyPem, string $certificatePassword, array $payload, \Psr\Log\LoggerInterface $logger): int |
| 259 | { |
| 260 | $retval = \ApplicationError::Success; |
| 261 | try { |
| 262 | $dompdf = new Dompdf(); |
| 263 | $dompdf->loadHtml($html, 'UTF-8'); |
| 264 | $dompdf->setPaper('A4', 'portrait'); |
| 265 | $dompdf->render(); |
| 266 | |
| 267 | $canvas = $dompdf->getCanvas(); |
| 268 | if ($canvas instanceof \Dompdf\Adapter\CPDF) { |
| 269 | $cpdf = $canvas->get_cpdf(); |
| 270 | $cpdf->signatureMaxLen = 65536; |
| 271 | if (!isset($cpdf->acroFormId)) { |
| 272 | $cpdf->addForm(3, false); |
| 273 | } |
| 274 | $cpdf->currentNode = 3; |
| 275 | $cpdf->selectFont('Helvetica'); |
| 276 | |
| 277 | $fieldSignatureId = $cpdf->addFormField( |
| 278 | \Dompdf\Cpdf::ACROFORM_FIELD_SIG, |
| 279 | 'AuthorizationSignature', |
| 280 | 0, |
| 281 | 0, |
| 282 | 0, |
| 283 | 0, |
| 284 | \Dompdf\Cpdf::ACROFORM_FIELD_READONLY |
| 285 | ); |
| 286 | $signatureId = $cpdf->addSignature( |
| 287 | $certificatePem, |
| 288 | $privateKeyPem, |
| 289 | $certificatePassword, |
| 290 | (string) ($payload['authorizerName'] ?? ''), |
| 291 | (string) ($payload['signatureCity'] ?? ''), |
| 292 | 'Autorizacion de representacion fiscal', |
| 293 | (string) ($payload['authorizerEmail'] ?? '') |
| 294 | ); |
| 295 | $cpdf->setFormFieldRefValue($fieldSignatureId, $signatureId); |
| 296 | } |
| 297 | else { |
| 298 | $retval = \ApplicationError::Certificate; |
| 299 | $logger->error("Dompdf canvas does not expose Cpdf object for digital signature."); |
| 300 | } |
| 301 | |
| 302 | if (success($retval)) { |
| 303 | $output = $dompdf->output(); |
| 304 | if (file_put_contents($destinationPath, $output) === false) { |
| 305 | $retval = \ApplicationError::Unknown; |
| 306 | $logger->error("Could not write signed authorization PDF to '".$destinationPath."'."); |
| 307 | } |
| 308 | } |
| 309 | } |
| 310 | catch (\Throwable $error) { |
| 311 | $retval = \ApplicationError::Unknown; |
| 312 | $logger->error("Could not generate signed authorization PDF: ".$error->getMessage()); |
| 313 | } |
| 314 | |
| 315 | return $retval; |
| 316 | } |
| 317 | |
| 318 | /** |
| 319 | * Action callable: generate and sign fiscal authorization PDF. |
| 320 | * |
| 321 | * @param string $body Request body with JSON-encoded fields. |
| 322 | * @param array<string, mixed> $query Query params: device, session, place. |
| 323 | * @param \ConxHelper $conx Connection helper. |
| 324 | * @param \Psr\Log\LoggerInterface $logger Logger. |
| 325 | * @param \UppServices\SessionService $sessionService Session service for check. |
| 326 | * @return array{output: string, contentType: string} |
| 327 | */ |
| 328 | return function (string $body, array $query, \ConxHelper $conx, \Psr\Log\LoggerInterface $logger, \UppServices\SessionService $sessionService): array { |
| 329 | $retval = \ApplicationError::Success; |
| 330 | $payload = []; |
| 331 | $place = null; |
| 332 | |
| 333 | if (success($retval)) { |
| 334 | $payload = json_decode($body, true); |
| 335 | if (!is_array($payload)) { |
| 336 | $retval = \ApplicationError::Parameters; |
| 337 | $logger->error("Invalid JSON payload for authorization endpoint."); |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | $device = $query['device'] ?? null; |
| 342 | if (success($retval) && !$device) { |
| 343 | $retval = \ApplicationError::Parameters; |
| 344 | $logger->error("No device provided on URL. Operation cancelled."); |
| 345 | } |
| 346 | |
| 347 | if (success($retval)) { |
| 348 | $session = $query['session'] ?? null; |
| 349 | if (!$session) { |
| 350 | $retval = \ApplicationError::Parameters; |
| 351 | $logger->error("No session provided on URL. Operation cancelled."); |
| 352 | } |
| 353 | else { |
| 354 | $userid = null; |
| 355 | $retval = $sessionService->checkSession($conx, (string) $session, (string) $device, $userid); |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | if (success($retval)) { |
| 360 | $place = $query['place'] ?? null; |
| 361 | if (!$place) { |
| 362 | $retval = \ApplicationError::Parameters; |
| 363 | $logger->error("Mandatory parameter 'place' not provided on URL. Operation cancelled."); |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | $requiredFields = [ |
| 368 | 'authorizerName', 'authorizerTaxId', 'authorizerAddress', |
| 369 | 'authorizerEmail', 'authorizerPhone', |
| 370 | 'signatureCity', |
| 371 | 'certificateContents', |
| 372 | ]; |
| 373 | if (success($retval)) { |
| 374 | foreach ($requiredFields as $field) { |
| 375 | $value = (string) ($payload[$field] ?? ''); |
| 376 | if (trim($value) === '') { |
| 377 | $retval = \ApplicationError::Parameters; |
| 378 | $logger->error("Mandatory field '".$field."' not provided on authorization payload."); |
| 379 | break; |
| 380 | } |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | if (success($retval)) { |
| 385 | $isLegalRepresentative = ((string) ($payload['isLegalRepresentative'] ?? '0')) === '1'; |
| 386 | if ($isLegalRepresentative) { |
| 387 | foreach (['legalRepresentativeName', 'legalRepresentativeTaxId'] as $field) { |
| 388 | $value = (string) ($payload[$field] ?? ''); |
| 389 | if (trim($value) === '') { |
| 390 | $retval = \ApplicationError::Parameters; |
| 391 | $logger->error("Missing legal representative field '".$field."' in authorization payload."); |
| 392 | break; |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | $certificateRawData = ''; |
| 399 | if (success($retval)) { |
| 400 | $certificateRawData = base64_decode((string) ($payload['certificateContents'] ?? ''), true); |
| 401 | if ($certificateRawData === false || $certificateRawData === '') { |
| 402 | $retval = \ApplicationError::Parameters; |
| 403 | $logger->error("Could not decode uploaded certificate content from payload."); |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | $certificatePem = null; |
| 408 | $privateKeyPem = null; |
| 409 | if (success($retval)) { |
| 410 | $retval = authorization_extract_certificate_data( |
| 411 | $certificateRawData, |
| 412 | (string) $payload['certificatePassword'], |
| 413 | $certificatePem, |
| 414 | $privateKeyPem, |
| 415 | $logger |
| 416 | ); |
| 417 | } |
| 418 | |
| 419 | if (success($retval)) { |
| 420 | $expectedTaxId = authorization_normalize_taxid((string) $payload['authorizerTaxId']); |
| 421 | $isLegalRepresentative = ((string) ($payload['isLegalRepresentative'] ?? '0')) === '1'; |
| 422 | if ($isLegalRepresentative) { |
| 423 | $expectedTaxId = authorization_normalize_taxid((string) ($payload['legalRepresentativeTaxId'] ?? '')); |
| 424 | } |
| 425 | |
| 426 | $taxids = authorization_extract_certificate_taxids((string) $certificatePem); |
| 427 | if ($expectedTaxId === '' || !in_array($expectedTaxId, $taxids, true)) { |
| 428 | $retval = \ApplicationError::Certificate; |
| 429 | $logger->error("Uploaded certificate tax ID does not match expected signer tax ID."); |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | $destinationPath = null; |
| 434 | $destinationFilename = null; |
| 435 | if (success($retval)) { |
| 436 | $legalFolder = \AppConstants::LegalPath(); |
| 437 | if ($legalFolder === '' || (!is_dir($legalFolder) && !@mkdir($legalFolder, 0755, true) && !is_dir($legalFolder))) { |
| 438 | $retval = \ApplicationError::NotFound; |
| 439 | $logger->error("Legal folder was not found or could not be created at '".$legalFolder."'."); |
| 440 | } |
| 441 | else { |
| 442 | $destinationFilename = str_pad((string) ((int) $place), 8, '0', STR_PAD_LEFT).'_autorizacion_firmada.pdf'; |
| 443 | $destinationPath = $legalFolder.'/'.$destinationFilename; |
| 444 | } |
| 445 | } |
| 446 | |
| 447 | if (success($retval) && $destinationPath !== null) { |
| 448 | $certificateSignatureData = authorization_build_certificate_signature_data((string) $certificatePem); |
| 449 | $html = authorization_build_html($payload, $certificateSignatureData); |
| 450 | $retval = authorization_generate_signed_pdf( |
| 451 | $destinationPath, |
| 452 | $html, |
| 453 | (string) $certificatePem, |
| 454 | (string) $privateKeyPem, |
| 455 | (string) $payload['certificatePassword'], |
| 456 | $payload, |
| 457 | $logger |
| 458 | ); |
| 459 | } |
| 460 | |
| 461 | $result = [ |
| 462 | "errorcode" => $retval, |
| 463 | "filename" => success($retval) ? $destinationFilename : null, |
| 464 | ]; |
| 465 | return ['output' => json_encode($result), 'contentType' => 'application/json; charset=utf-8']; |
| 466 | }; |
| 467 | ?> |