PDF password and security in PHP and PDF.co Web API

What is PDF.co Web API? It is the Rest API that provides set of data extraction functions, tools for documents manipulation, splitting and merging of pdf files. Includes built-in OCR, images recognition, can generate and read barcodes from images, scans and pdf.

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protect-pdf.php

      
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Protect PDF Document Example</title> </head> <body> <?php // Note: If you have input files large than 200kb we highly recommend to check "async" mode example. // Get submitted form data $apiKey = $_POST["apiKey"]; // The authentication key (API Key). Get your own by registering at https://app.pdf.co/documentation/api // 1. RETRIEVE THE PRESIGNED URL TO UPLOAD THE FILE. // * If you already have the direct PDF file link, go to the step 3. // Create URL $url = "https://api.pdf.co/v1/file/upload/get-presigned-url" . "?name=" . $_FILES["file"]["name"] . "&contenttype=application/octet-stream"; // Create request $curl = curl_init(); curl_setopt($curl, CURLOPT_HTTPHEADER, array("x-api-key: " . $apiKey)); curl_setopt($curl, CURLOPT_URL, $url); curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); // Execute request $result = curl_exec($curl); if (curl_errno($curl) == 0) { $status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE); if ($status_code == 200) { $json = json_decode($result, true); // Get URL to use for the file upload $uploadFileUrl = $json["presignedUrl"]; // Get URL of uploaded file to use with later API calls $uploadedFileUrl = $json["url"]; // 2. UPLOAD THE FILE TO CLOUD. $localFile = $_FILES["file"]["tmp_name"]; $fileHandle = fopen($localFile, "r"); curl_setopt($curl, CURLOPT_URL, $uploadFileUrl); curl_setopt($curl, CURLOPT_HTTPHEADER, array("content-type: application/octet-stream")); curl_setopt($curl, CURLOPT_PUT, true); curl_setopt($curl, CURLOPT_INFILE, $fileHandle); curl_setopt($curl, CURLOPT_INFILESIZE, filesize($localFile)); // Execute request curl_exec($curl); fclose($fileHandle); if (curl_errno($curl) == 0) { $status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE); if ($status_code == 200) { // 3. PROTECT PDF FILE ProtectPdf($apiKey, $uploadedFileUrl); } else { // Display request error echo "<p>Status code: " . $status_code . "</p>"; echo "<p>" . $result . "</p>"; } } else { // Display CURL error echo "Error: " . curl_error($curl); } } else { // Display service reported error echo "<p>Status code: " . $status_code . "</p>"; echo "<p>" . $result . "</p>"; } curl_close($curl); } else { // Display CURL error echo "Error: " . curl_error($curl); } function ProtectPdf($apiKey, $uploadedFileUrl) { // Passwords to protect PDF document // The owner password will be required for document modification. // The user password only allows to view and print the document. $OwnerPassword = "123456"; $UserPassword = "654321"; // Encryption algorithm. // Valid values: "RC4_40bit", "RC4_128bit", "AES_128bit", "AES_256bit". $EncryptionAlgorithm = "AES_128bit"; // Allow or prohibit content extraction for accessibility needs. $AllowAccessibilitySupport = true; // Allow or prohibit assembling the document. $AllowAssemblyDocument = true; // Allow or prohibit printing PDF document. $AllowPrintDocument = true; // Allow or prohibit filling of interactive form fields (including signature fields) in PDF document. $AllowFillForms = true; // Allow or prohibit modification of PDF document. $AllowModifyDocument = true; // Allow or prohibit copying content from PDF document. $AllowContentExtraction = true; // Allow or prohibit interacting with text annotations and forms in PDF document. $AllowModifyAnnotations = true; // Allowed printing quality. // Valid values: "HighResolution", "LowResolution" $PrintQuality = "HighResolution"; // Prepare URL for `PDF Security` API call $url = "https://api.pdf.co/v1/pdf/security/add"; // Prepare requests params $parameters = array(); $parameters["name"] = "result.pdf"; $parameters["url"] = $uploadedFileUrl; $parameters["ownerPassword"] = $OwnerPassword; $parameters["userPassword"] = $UserPassword; $parameters["encryptionAlgorithm"] = $EncryptionAlgorithm; $parameters["allowAccessibilitySupport"] = $AllowAccessibilitySupport; $parameters["allowAssemblyDocument"] = $AllowAssemblyDocument; $parameters["allowPrintDocument"] = $AllowPrintDocument; $parameters["allowFillForms"] = $AllowFillForms; $parameters["allowModifyDocument"] = $AllowModifyDocument; $parameters["allowContentExtraction"] = $AllowContentExtraction; $parameters["allowModifyAnnotations"] = $AllowModifyAnnotations; $parameters["printQuality"] = $PrintQuality; // Create Json payload $data = json_encode($parameters); // Create request $curl = curl_init(); curl_setopt($curl, CURLOPT_HTTPHEADER, array("x-api-key: " . $apiKey, "Content-type: application/json")); curl_setopt($curl, CURLOPT_URL, $url); curl_setopt($curl, CURLOPT_POST, true); curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); curl_setopt($curl, CURLOPT_POSTFIELDS, $data); // Execute request $result = curl_exec($curl); if (curl_errno($curl) == 0) { $status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE); if ($status_code == 200) { $json = json_decode($result, true); if ($json["error"] == false) { $resultFileUrl = $json["url"]; // Display link to the result file echo "<div><h2>Conversion Result:</h2><a href='" . $resultFileUrl . "' target='_blank'>" . $resultFileUrl . "</a></div>"; } else { // Display service reported error echo "<p>Error: " . $json["message"] . "</p>"; } } else { // Display request error echo "<p>Status code: " . $status_code . "</p>"; echo "<p>" . $result . "</p>"; } } else { // Display CURL error echo "Error: " . curl_error($curl); } // Cleanup curl_close($curl); } ?> </body> </html>

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