From ba20536436605eec66bf3424464e0abafcef98b2 Mon Sep 17 00:00:00 2001 From: abdullahalam123 Date: Fri, 24 Oct 2025 13:42:09 +0530 Subject: [PATCH] feat(pdf-tools): add remove-restrictions tool for unlocking pdfs Implement new feature to remove security restrictions from PDFs including password protection and digital signature limitations. The tool allows users to unlock PDFs they have legitimate access to for editing and printing purposes. Includes UI components, error handling, and legal disclaimer about proper usage. --- src/js/config/pdf-tools.ts | 1 + src/js/config/tools.ts | 11 ++- src/js/handlers/fileHandler.ts | 3 +- src/js/logic/change-permissions.ts | 100 ++++++++++++++++------------ src/js/logic/decrypt.ts | 6 +- src/js/logic/encrypt.ts | 32 ++++----- src/js/logic/index.ts | 2 + src/js/logic/remove-restrictions.ts | 99 +++++++++++++++++++++++++++ src/js/ui.ts | 46 ++++++++++++- src/js/utils/helpers.ts | 2 +- 10 files changed, 234 insertions(+), 68 deletions(-) create mode 100644 src/js/logic/remove-restrictions.ts diff --git a/src/js/config/pdf-tools.ts b/src/js/config/pdf-tools.ts index 56d0cd3..f43cfaa 100644 --- a/src/js/config/pdf-tools.ts +++ b/src/js/config/pdf-tools.ts @@ -39,6 +39,7 @@ export const singlePdfLoadTools = [ 'remove-blank-pages', 'add-attachments', 'sanitize-pdf', + 'remove-restrictions', ]; export const simpleTools = [ diff --git a/src/js/config/tools.ts b/src/js/config/tools.ts index b845c48..868d936 100644 --- a/src/js/config/tools.ts +++ b/src/js/config/tools.ts @@ -401,6 +401,13 @@ export const categories = [ icon: 'ruler', subtitle: 'Analyze page size, orientation, and units.', }, + { + id: 'remove-restrictions', + name: 'Remove Restrictions', + icon: 'unlink', + subtitle: + 'Remove password protection and security restrictions associated with digitally signed PDF files.', + }, ], }, { @@ -410,7 +417,7 @@ export const categories = [ id: 'encrypt', name: 'Encrypt PDF', icon: 'lock', - subtitle: 'Add a password to protect your PDF.', + subtitle: 'Lock your PDF by adding a password.', }, { id: 'sanitize-pdf', @@ -422,7 +429,7 @@ export const categories = [ id: 'decrypt', name: 'Decrypt PDF', icon: 'unlock', - subtitle: 'Remove password protection from a PDF.', + subtitle: 'Unlock PDF by removing password protection.', }, { id: 'flatten', diff --git a/src/js/handlers/fileHandler.ts b/src/js/handlers/fileHandler.ts index 3c04413..96d796a 100644 --- a/src/js/handlers/fileHandler.ts +++ b/src/js/handlers/fileHandler.ts @@ -33,7 +33,8 @@ async function handleSinglePdfUpload(toolId, file) { if ( state.pdfDoc.isEncrypted && toolId !== 'decrypt' && - toolId !== 'change-permissions' + toolId !== 'change-permissions' && + toolId !== 'remove-restrictions' ) { showAlert( 'Protected PDF', diff --git a/src/js/logic/change-permissions.ts b/src/js/logic/change-permissions.ts index 7a42992..d94dc66 100644 --- a/src/js/logic/change-permissions.ts +++ b/src/js/logic/change-permissions.ts @@ -1,18 +1,22 @@ import { showLoader, hideLoader, showAlert } from '../ui.js'; -import { downloadFile, initializeQpdf, readFileAsArrayBuffer } from '../utils/helpers.js'; +import { + downloadFile, + initializeQpdf, + readFileAsArrayBuffer, +} from '../utils/helpers.js'; import { state } from '../state.js'; export async function changePermissions() { const file = state.files[0]; - const currentPassword = ( - document.getElementById('current-password') as HTMLInputElement - )?.value || ''; - const newUserPassword = ( - document.getElementById('new-user-password') as HTMLInputElement - )?.value || ''; - const newOwnerPassword = ( - document.getElementById('new-owner-password') as HTMLInputElement - )?.value || ''; + const currentPassword = + (document.getElementById('current-password') as HTMLInputElement)?.value || + ''; + const newUserPassword = + (document.getElementById('new-user-password') as HTMLInputElement)?.value || + ''; + const newOwnerPassword = + (document.getElementById('new-owner-password') as HTMLInputElement) + ?.value || ''; const inputPath = '/input.pdf'; const outputPath = '/output.pdf'; @@ -37,21 +41,34 @@ export async function changePermissions() { } const shouldEncrypt = newUserPassword || newOwnerPassword; - + if (shouldEncrypt) { const finalUserPassword = newUserPassword; const finalOwnerPassword = newOwnerPassword; args.push('--encrypt', finalUserPassword, finalOwnerPassword, '256'); - // Get permission checkboxes - const allowPrinting = (document.getElementById('allow-printing') as HTMLInputElement)?.checked; - const allowCopying = (document.getElementById('allow-copying') as HTMLInputElement)?.checked; - const allowModifying = (document.getElementById('allow-modifying') as HTMLInputElement)?.checked; - const allowAnnotating = (document.getElementById('allow-annotating') as HTMLInputElement)?.checked; - const allowFillingForms = (document.getElementById('allow-filling-forms') as HTMLInputElement)?.checked; - const allowDocumentAssembly = (document.getElementById('allow-document-assembly') as HTMLInputElement)?.checked; - const allowPageExtraction = (document.getElementById('allow-page-extraction') as HTMLInputElement)?.checked; + const allowPrinting = ( + document.getElementById('allow-printing') as HTMLInputElement + )?.checked; + const allowCopying = ( + document.getElementById('allow-copying') as HTMLInputElement + )?.checked; + const allowModifying = ( + document.getElementById('allow-modifying') as HTMLInputElement + )?.checked; + const allowAnnotating = ( + document.getElementById('allow-annotating') as HTMLInputElement + )?.checked; + const allowFillingForms = ( + document.getElementById('allow-filling-forms') as HTMLInputElement + )?.checked; + const allowDocumentAssembly = ( + document.getElementById('allow-document-assembly') as HTMLInputElement + )?.checked; + const allowPageExtraction = ( + document.getElementById('allow-page-extraction') as HTMLInputElement + )?.checked; if (finalOwnerPassword) { if (!allowModifying) args.push('--modify=none'); @@ -71,28 +88,28 @@ export async function changePermissions() { } args.push('--', outputPath); - - console.log('qpdf args:', args); - try { qpdf.callMain(args); } catch (qpdfError: any) { console.error('qpdf execution error:', qpdfError); - - // Check for various password-related errors + const errorMsg = qpdfError.message || ''; - - if (errorMsg.includes('invalid password') || - errorMsg.includes('incorrect password') || - errorMsg.includes('password')) { + + if ( + errorMsg.includes('invalid password') || + errorMsg.includes('incorrect password') || + errorMsg.includes('password') + ) { throw new Error('INVALID_PASSWORD'); } - - if (errorMsg.includes('encrypted') || - errorMsg.includes('password required')) { + + if ( + errorMsg.includes('encrypted') || + errorMsg.includes('password required') + ) { throw new Error('PASSWORD_REQUIRED'); } - + throw new Error('Processing failed: ' + errorMsg || 'Unknown error'); } @@ -107,17 +124,18 @@ export async function changePermissions() { downloadFile(blob, `permissions-changed-${file.name}`); hideLoader(); - + let successMessage = 'PDF permissions changed successfully!'; if (!shouldEncrypt) { - successMessage = 'PDF decrypted successfully! All encryption and restrictions removed.'; + successMessage = + 'PDF decrypted successfully! All encryption and restrictions removed.'; } - + showAlert('Success', successMessage); } catch (error: any) { console.error('Error during PDF permission change:', error); hideLoader(); - + if (error.message === 'INVALID_PASSWORD') { showAlert( 'Incorrect Password', @@ -139,17 +157,13 @@ export async function changePermissions() { if (qpdf?.FS) { try { qpdf.FS.unlink(inputPath); - } catch (e) { - - } + } catch (e) {} try { qpdf.FS.unlink(outputPath); - } catch (e) { - - } + } catch (e) {} } } catch (cleanupError) { console.warn('Failed to cleanup WASM FS:', cleanupError); } } -} \ No newline at end of file +} diff --git a/src/js/logic/decrypt.ts b/src/js/logic/decrypt.ts index 21c3cbb..b77e2c5 100644 --- a/src/js/logic/decrypt.ts +++ b/src/js/logic/decrypt.ts @@ -1,5 +1,9 @@ import { showLoader, hideLoader, showAlert } from '../ui.js'; -import { downloadFile, initializeQpdf, readFileAsArrayBuffer } from '../utils/helpers.js'; +import { + downloadFile, + initializeQpdf, + readFileAsArrayBuffer, +} from '../utils/helpers.js'; import { state } from '../state.js'; export async function decrypt() { diff --git a/src/js/logic/encrypt.ts b/src/js/logic/encrypt.ts index a2b5c1f..e6823f8 100644 --- a/src/js/logic/encrypt.ts +++ b/src/js/logic/encrypt.ts @@ -1,5 +1,9 @@ import { showLoader, hideLoader, showAlert } from '../ui.js'; -import { downloadFile, initializeQpdf, readFileAsArrayBuffer } from '../utils/helpers.js'; +import { + downloadFile, + initializeQpdf, + readFileAsArrayBuffer, +} from '../utils/helpers.js'; import { state } from '../state.js'; export async function encrypt() { @@ -35,32 +39,24 @@ export async function encrypt() { showLoader('Encrypting PDF with 256-bit AES...'); - const args = [ - inputPath, - '--encrypt', - userPassword, - ownerPassword, - '256', - ]; + const args = [inputPath, '--encrypt', userPassword, ownerPassword, '256']; // Only add restrictions if a distinct owner password was provided if (hasDistinctOwnerPassword) { args.push( '--modify=none', - '--extract=n', - '--print=none', - '--accessibility=n', - '--annotate=n', - '--assemble=n', - '--form=n', - '--modify-other=n', + '--extract=n', + '--print=none', + '--accessibility=n', + '--annotate=n', + '--assemble=n', + '--form=n', + '--modify-other=n' ); } args.push('--', outputPath); - console.log(args); - try { qpdf.callMain(args); } catch (qpdfError: any) { @@ -114,4 +110,4 @@ export async function encrypt() { console.warn('Failed to cleanup WASM FS:', cleanupError); } } -} \ No newline at end of file +} diff --git a/src/js/logic/index.ts b/src/js/logic/index.ts index 261c41e..34d9cf5 100644 --- a/src/js/logic/index.ts +++ b/src/js/logic/index.ts @@ -64,12 +64,14 @@ import { alternateMerge, setupAlternateMergeTool } from './alternate-merge.js'; import { linearizePdf } from './linearize.js'; import { addAttachments, setupAddAttachmentsTool } from './add-attachments.js'; import { sanitizePdf } from './sanitize-pdf.js'; +import { removeRestrictions } from './remove-restrictions.js'; export const toolLogic = { merge: { process: merge, setup: setupMergeTool }, split: { process: split, setup: setupSplitTool }, encrypt, decrypt, + 'remove-restrictions': removeRestrictions, organize, rotate, 'add-page-numbers': addPageNumbers, diff --git a/src/js/logic/remove-restrictions.ts b/src/js/logic/remove-restrictions.ts new file mode 100644 index 0000000..3fe0f76 --- /dev/null +++ b/src/js/logic/remove-restrictions.ts @@ -0,0 +1,99 @@ +import { showLoader, hideLoader, showAlert } from '../ui.js'; +import { + downloadFile, + initializeQpdf, + readFileAsArrayBuffer, +} from '../utils/helpers.js'; +import { state } from '../state.js'; + +export async function removeRestrictions() { + const file = state.files[0]; + const password = + (document.getElementById('owner-password-remove') as HTMLInputElement) + ?.value || ''; + + const inputPath = '/input.pdf'; + const outputPath = '/output.pdf'; + let qpdf: any; + + try { + showLoader('Initializing...'); + qpdf = await initializeQpdf(); + + showLoader('Reading PDF...'); + const fileBuffer = await readFileAsArrayBuffer(file); + const uint8Array = new Uint8Array(fileBuffer as ArrayBuffer); + + qpdf.FS.writeFile(inputPath, uint8Array); + + showLoader('Removing restrictions...'); + + const args = [inputPath]; + + if (password) { + args.push(`--password=${password}`); + } + + args.push('--decrypt', '--remove-restrictions', '--', outputPath); + + try { + qpdf.callMain(args); + } catch (qpdfError: any) { + console.error('qpdf execution error:', qpdfError); + if ( + qpdfError.message?.includes('password') || + qpdfError.message?.includes('encrypt') + ) { + throw new Error( + 'Failed to remove restrictions. The PDF may require the correct owner password.' + ); + } + + throw new Error( + 'Failed to remove restrictions: ' + + (qpdfError.message || 'Unknown error') + ); + } + + showLoader('Preparing download...'); + const outputFile = qpdf.FS.readFile(outputPath, { encoding: 'binary' }); + + if (!outputFile || outputFile.length === 0) { + throw new Error('Operation resulted in an empty file.'); + } + + const blob = new Blob([outputFile], { type: 'application/pdf' }); + downloadFile(blob, `unrestricted-${file.name}`); + + hideLoader(); + + showAlert( + 'Success', + 'PDF restrictions removed successfully! The file is now fully editable and printable.' + ); + } catch (error: any) { + console.error('Error during restriction removal:', error); + hideLoader(); + showAlert( + 'Operation Failed', + `An error occurred: ${error.message || 'The PDF might be corrupted or password-protected.'}` + ); + } finally { + try { + if (qpdf?.FS) { + try { + qpdf.FS.unlink(inputPath); + } catch (e) { + console.warn('Failed to unlink input file:', e); + } + try { + qpdf.FS.unlink(outputPath); + } catch (e) { + console.warn('Failed to unlink output file:', e); + } + } + } catch (cleanupError) { + console.warn('Failed to cleanup WASM FS:', cleanupError); + } + } +} diff --git a/src/js/ui.ts b/src/js/ui.ts index 2ae7894..0bfc1d6 100644 --- a/src/js/ui.ts +++ b/src/js/ui.ts @@ -913,7 +913,7 @@ export const toolTemplates = { `, -'change-permissions': () => ` + 'change-permissions': () => `

Change PDF Permissions

Modify passwords and permissions without losing quality.

${createFileInputHTML()} @@ -936,7 +936,7 @@ export const toolTemplates = {
-

đź“ť How It Works

+

How It Works

`, + + 'remove-restrictions': () => ` +

Remove PDF Restrictions

+

Remove security restrictions and unlock PDF permissions for editing and printing.

+ ${createFileInputHTML()} +
+ +`, }; diff --git a/src/js/utils/helpers.ts b/src/js/utils/helpers.ts index 3727fec..0998487 100644 --- a/src/js/utils/helpers.ts +++ b/src/js/utils/helpers.ts @@ -176,4 +176,4 @@ export async function initializeQpdf() { } return qpdfInstance; -} \ No newline at end of file +}