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Merge pull request #2412 from reecebrowne/feature/1856/decrypt
Feature/1856/decrypt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,5 @@ | ||
| blank_issues_enabled: true | ||
| contact_links: | ||
| - name: 💬 Discord Server | ||
| url: https://discord.gg/Cn8pWhQRxZ | ||
| url: https://discord.gg/HYmhKj45pU | ||
| about: You can join our Discord server for real time discussion and support |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| export class DecryptFile { | ||
| async decryptFile(file, requiresPassword) { | ||
| try { | ||
| const formData = new FormData(); | ||
| formData.append('fileInput', file); | ||
| if (requiresPassword) { | ||
| const password = prompt(`${window.decrypt.passwordPrompt}`); | ||
|
|
||
| if (password === null) { | ||
| // User cancelled | ||
| console.error(`Password prompt cancelled for PDF: ${file.name}`); | ||
| return null; // No file to return | ||
| } | ||
|
|
||
| if (!password) { | ||
| // No password provided | ||
| console.error(`No password provided for encrypted PDF: ${file.name}`); | ||
| this.showErrorBanner( | ||
| `${window.decrypt.noPassword.replace('{0}', file.name)}`, | ||
| '', | ||
| `${window.decrypt.unexpectedError}` | ||
| ); | ||
| return null; // No file to return | ||
| } | ||
|
|
||
| formData.append('password', password); | ||
| } | ||
| // Send decryption request | ||
| const response = await fetch('/api/v1/security/remove-password', { | ||
| method: 'POST', | ||
| body: formData, | ||
| }); | ||
|
|
||
| if (response.ok) { | ||
| const decryptedBlob = await response.blob(); | ||
| this.removeErrorBanner(); | ||
| return new File([decryptedBlob], file.name, {type: 'application/pdf'}); | ||
| } else { | ||
| const errorText = await response.text(); | ||
| console.error(`${window.decrypt.invalidPassword} ${errorText}`); | ||
| this.showErrorBanner( | ||
| `${window.decrypt.invalidPassword}`, | ||
| errorText, | ||
| `${window.decrypt.invalidPasswordHeader.replace('{0}', file.name)}` | ||
| ); | ||
| return null; // No file to return | ||
| } | ||
| } catch (error) { | ||
| // Handle network or unexpected errors | ||
| console.error(`Failed to decrypt PDF: ${file.name}`, error); | ||
| this.showErrorBanner( | ||
| `${window.decrypt.unexpectedError.replace('{0}', file.name)}`, | ||
| `${error.message || window.decrypt.unexpectedError}`, | ||
| error | ||
| ); | ||
| return null; // No file to return | ||
| } | ||
| } | ||
|
|
||
| async checkFileEncrypted(file) { | ||
| try { | ||
| if (file.type !== 'application/pdf') { | ||
| return {isEncrypted: false, requiresPassword: false}; | ||
| } | ||
|
|
||
| pdfjsLib.GlobalWorkerOptions.workerSrc = './pdfjs-legacy/pdf.worker.mjs'; | ||
| const arrayBuffer = await file.arrayBuffer(); | ||
| const arrayBufferForPdfLib = arrayBuffer.slice(0); | ||
|
|
||
| const loadingTask = pdfjsLib.getDocument({ | ||
| data: arrayBuffer, | ||
| }); | ||
|
|
||
| await loadingTask.promise; | ||
|
|
||
| try { | ||
| //Uses PDFLib.PDFDocument to check if unpassworded but encrypted | ||
| const pdfDoc = await PDFLib.PDFDocument.load(arrayBufferForPdfLib); | ||
| return {isEncrypted: false, requiresPassword: false}; | ||
| } catch (error) { | ||
| if (error.message.includes('Input document to `PDFDocument.load` is encrypted')) { | ||
| return {isEncrypted: true, requiresPassword: false}; | ||
| } | ||
| console.error('Error checking encryption:', error); | ||
| throw new Error('Failed to determine if the file is encrypted.'); | ||
| } | ||
| } catch (error) { | ||
| if (error.name === 'PasswordException') { | ||
| if (error.code === pdfjsLib.PasswordResponses.NEED_PASSWORD) { | ||
| return {isEncrypted: true, requiresPassword: true}; | ||
| } else if (error.code === pdfjsLib.PasswordResponses.INCORRECT_PASSWORD) { | ||
| return {isEncrypted: true, requiresPassword: false}; | ||
| } | ||
| } | ||
|
|
||
| console.error('Error checking encryption:', error); | ||
| throw new Error('Failed to determine if the file is encrypted.'); | ||
| } | ||
| } | ||
|
|
||
| showErrorBanner(message, stackTrace, error) { | ||
| const errorContainer = document.getElementById('errorContainer'); | ||
| errorContainer.style.display = 'block'; // Display the banner | ||
| errorContainer.querySelector('.alert-heading').textContent = error; | ||
| errorContainer.querySelector('p').textContent = message; | ||
| document.querySelector('#traceContent').textContent = stackTrace; | ||
| } | ||
|
|
||
| removeErrorBanner() { | ||
| const errorContainer = document.getElementById('errorContainer'); | ||
| errorContainer.style.display = 'none'; // Hide the banner | ||
| errorContainer.querySelector('.alert-heading').textContent = ''; | ||
| errorContainer.querySelector('p').textContent = ''; | ||
| document.querySelector('#traceContent').textContent = ''; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| document.getElementById('download-pdf').addEventListener('click', async () => { | ||
| const modifiedPdf = await DraggableUtils.getOverlayedPdfDocument(); | ||
| let decryptedFile = modifiedPdf; | ||
| let isEncrypted = false; | ||
| let requiresPassword = false; | ||
| await this.decryptFile | ||
| .checkFileEncrypted(decryptedFile) | ||
| .then((result) => { | ||
| isEncrypted = result.isEncrypted; | ||
| requiresPassword = result.requiresPassword; | ||
| }) | ||
| .catch((error) => { | ||
| console.error(error); | ||
| }); | ||
| if (decryptedFile.type === 'application/pdf' && isEncrypted) { | ||
| decryptedFile = await this.decryptFile.decryptFile(decryptedFile, requiresPassword); | ||
| if (!decryptedFile) { | ||
| throw new Error('File decryption failed.'); | ||
| } | ||
| } | ||
| const modifiedPdfBytes = await modifiedPdf.save(); | ||
| const blob = new Blob([modifiedPdfBytes], {type: 'application/pdf'}); | ||
| const link = document.createElement('a'); | ||
| link.href = URL.createObjectURL(blob); | ||
| link.download = originalFileName + '_signed.pdf'; | ||
| link.click(); | ||
| }); |
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