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new file mode 100644 index 0000000..645ffdb --- /dev/null +++ b/pdf-merge-safe/package.json @@ -0,0 +1,5 @@ +{ + "dependencies": { + "pdf-lib": "^1.17.1" + } +} diff --git a/pdf-merge-safe/pdf-merge-safe/examples/encrypted.pdf b/pdf-merge-safe/pdf-merge-safe/examples/encrypted.pdf new file mode 100644 index 0000000..10cc6fd Binary files /dev/null and b/pdf-merge-safe/pdf-merge-safe/examples/encrypted.pdf differ diff --git a/pdf-merge-safe/pdf-merge-safe/examples/normal1.pdf b/pdf-merge-safe/pdf-merge-safe/examples/normal1.pdf new file mode 100644 index 0000000..b203523 Binary files /dev/null and b/pdf-merge-safe/pdf-merge-safe/examples/normal1.pdf differ diff --git a/pdf-merge-safe/pdf-merge-safe/examples/normal2.pdf b/pdf-merge-safe/pdf-merge-safe/examples/normal2.pdf new file mode 100644 index 0000000..ad55ada Binary files /dev/null and b/pdf-merge-safe/pdf-merge-safe/examples/normal2.pdf differ diff --git a/pdf-merge-safe/pdf-merge-safe/output/merged.pdf b/pdf-merge-safe/pdf-merge-safe/output/merged.pdf new file mode 100644 index 0000000..97ec611 Binary files /dev/null and b/pdf-merge-safe/pdf-merge-safe/output/merged.pdf differ diff --git a/pdf-merge-safe/pdf-merge-safe/package-lock.json b/pdf-merge-safe/pdf-merge-safe/package-lock.json new file mode 100644 index 0000000..f33c764 --- /dev/null +++ b/pdf-merge-safe/pdf-merge-safe/package-lock.json @@ -0,0 +1,58 @@ +{ + "name": "pdf-merge-safe", + "version": "1.0.0", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "pdf-merge-safe", + "version": "1.0.0", + "license": "ISC", + "dependencies": { + "pdf-lib": "^1.17.1" + } + }, + "node_modules/@pdf-lib/standard-fonts": { + "version": "1.0.0", + "resolved": "https://registry.npmjs.org/@pdf-lib/standard-fonts/-/standard-fonts-1.0.0.tgz", + "integrity": "sha512-hU30BK9IUN/su0Mn9VdlVKsWBS6GyhVfqjwl1FjZN4TxP6cCw0jP2w7V3Hf5uX7M0AZJ16vey9yE0ny7Sa59ZA==", + "license": "MIT", + "dependencies": { + "pako": "^1.0.6" + } + 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"node_modules/tslib": { + "version": "1.14.1", + "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz", + "integrity": "sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg==", + "license": "0BSD" + } + } +} diff --git a/pdf-merge-safe/pdf-merge-safe/package.json b/pdf-merge-safe/pdf-merge-safe/package.json new file mode 100644 index 0000000..98190ff --- /dev/null +++ b/pdf-merge-safe/pdf-merge-safe/package.json @@ -0,0 +1,16 @@ +{ + "name": "pdf-merge-safe", + "version": "1.0.0", + "description": "Merge PDFs with safe handling of encrypted/signed inputs (pdf-lib).", + "type": "commonjs", + "scripts": { + "scan": "node src/scan.js", + "merge": "node src/index.js", + "merge:yes": "node src/index.js --yes", + "make:normal": "node scripts/make-normal.js", + "make:encrypted": "node scripts/make-encrypted.js" + }, + "dependencies": { + "pdf-lib": "^1.17.1" + } +} diff --git a/pdf-merge-safe/pdf-merge-safe/scripts/make-normal.js b/pdf-merge-safe/pdf-merge-safe/scripts/make-normal.js new file mode 100644 index 0000000..2cc8012 --- /dev/null +++ b/pdf-merge-safe/pdf-merge-safe/scripts/make-normal.js @@ -0,0 +1,20 @@ +const fs = require("fs"); +const path = require("path"); +const { PDFDocument, StandardFonts, rgb } = require("pdf-lib"); + +async function make(text, outfile) { + const pdf = await PDFDocument.create(); + const page = pdf.addPage([420, 300]); + const font = await pdf.embedFont(StandardFonts.Helvetica); + page.drawText(text, { x: 40, y: 150, size: 18, font, color: rgb(0,0,0) }); + const bytes = await pdf.save(); + fs.writeFileSync(outfile, bytes); + console.log("āœ… Created", outfile); +} + +(async () => { + const dir = "examples"; + fs.mkdirSync(dir, { recursive: true }); + await make("Hello from normal1", path.join(dir, "normal1.pdf")); + await make("Hello from normal2", path.join(dir, "normal2.pdf")); +})(); diff --git a/pdf-merge-safe/pdf-merge-safe/src/index.js b/pdf-merge-safe/pdf-merge-safe/src/index.js new file mode 100644 index 0000000..a55355b --- /dev/null +++ b/pdf-merge-safe/pdf-merge-safe/src/index.js @@ -0,0 +1,94 @@ +const fs = require("fs"); +const path = require("path"); +const { PDFDocument } = require("pdf-lib"); +const { askYesNo } = require("./prompt"); + +// helpers +const isPdf = (p) => p.toLowerCase().endsWith(".pdf"); +const exists = (p) => fs.existsSync(p); +const read = (p) => fs.readFileSync(p); + +function listPdfs(target) { + if (!exists(target)) return []; + const stat = fs.lstatSync(target); + if (stat.isDirectory()) { + return fs.readdirSync(target) + .filter((f) => isPdf(f)) + .map((f) => path.join(target, f)); + } + return isPdf(target) ? [target] : []; +} + +async function safeLoad(buffer, filename, autoYes) { + try { + return await PDFDocument.load(buffer); // normal, non-encrypted + } catch (err) { + const msg = String(err.message).toLowerCase(); + if (!msg.includes("encrypted")) throw err; + + console.warn(`\nšŸ” Detected encrypted/signed file: ${filename}`); + console.warn(`āš ļø If you continue, encryption/signature will be REMOVED in merged output.`); + + if (!autoYes) { + const ok = await askYesNo("Continue by stripping protection?"); + if (!ok) return null; // skip + } + return await PDFDocument.load(buffer, { ignoreEncryption: true }); + } +} + +async function merge(files, outPath, autoYes) { + const merged = await PDFDocument.create(); + let total = 0; + + for (const file of files) { + const buf = read(file); + const name = path.basename(file); + + // heuristic signature marker + const hasSig = buf.includes("/Sig"); + + const doc = await safeLoad(buf, name, autoYes); + if (!doc) { console.log(`ā­ļø Skipped: ${name}`); continue; } + + if (hasSig) { + console.warn(`āš ļø ${name} appears signed. Merging will invalidate the signature.`); + } + + const pages = await merged.copyPages(doc, doc.getPageIndices()); + pages.forEach((p) => merged.addPage(p)); + total += pages.length; + console.log(`āž• Added ${pages.length} page(s) from ${name}`); + } + + if (total === 0) { console.log("āŒ No pages added. Nothing to save."); return; } + + fs.mkdirSync(path.dirname(outPath), { recursive: true }); + const bytes = await merged.save(); + fs.writeFileSync(outPath, bytes); + console.log(`\nāœ… Saved: ${outPath} (total pages: ${total})`); +} + +// -------- CLI -------- +// Usage: +// node src/index.js [--yes|-y] [fileOrFolder2 ...] +(async () => { + const args = process.argv.slice(2); + const autoYes = args.includes("--yes") || args.includes("-y"); + const a = args.filter((x) => x !== "--yes" && x !== "-y"); + + if (a.length < 2) { + console.log("Usage: node src/index.js [--yes|-y] [fileOrFolder2 ...]"); + process.exit(1); + } + + const out = a[0]; + const inputs = a.slice(1); + + let files = []; + inputs.forEach((p) => { files = files.concat(listPdfs(p)); }); + + if (files.length === 0) { console.log("āŒ No PDFs found in given paths."); process.exit(1); } + + await merge(files, out, autoYes); +})(); diff --git a/pdf-merge-safe/pdf-merge-safe/src/prompt.js b/pdf-merge-safe/pdf-merge-safe/src/prompt.js new file mode 100644 index 0000000..520a2eb --- /dev/null +++ b/pdf-merge-safe/pdf-merge-safe/src/prompt.js @@ -0,0 +1,13 @@ +const readline = require("readline"); + +function askYesNo(question) { + return new Promise((resolve) => { + const rl = readline.createInterface({ input: process.stdin, output: process.stdout }); + rl.question(`${question} (y/n): `, (ans) => { + rl.close(); + resolve(String(ans).trim().toLowerCase().startsWith("y")); + }); + }); +} + +module.exports = { askYesNo }; diff --git a/pdf-merge-safe/pdf-merge-safe/src/scan.js b/pdf-merge-safe/pdf-merge-safe/src/scan.js new file mode 100644 index 0000000..c3f2b32 --- /dev/null +++ b/pdf-merge-safe/pdf-merge-safe/src/scan.js @@ -0,0 +1,33 @@ +const fs = require("fs"); +const path = require("path"); +const { PDFDocument } = require("pdf-lib"); + +function gather(p) { + if (!fs.existsSync(p)) return []; + const stat = fs.lstatSync(p); + if (stat.isDirectory()) { + return fs.readdirSync(p) + .filter((f) => f.toLowerCase().endsWith(".pdf")) + .map((f) => path.join(p, f)); + } + return p.toLowerCase().endsWith(".pdf") ? [p] : []; +} + +(async () => { + const target = process.argv[2] || "examples"; + const files = gather(target); + if (files.length === 0) { console.log("No PDFs found in", target); process.exit(0); } + + console.log(`šŸ” Scanning ${files.length} file(s) in: ${target}\n`); + for (const f of files) { + const buf = fs.readFileSync(f); + const name = path.basename(f); + + let encrypted = false; + try { await PDFDocument.load(buf); } + catch (e) { encrypted = String(e.message).toLowerCase().includes("encrypted"); } + + const signed = buf.includes("/Sig"); + console.log(`ā€¢ ${name}\n - Encrypted: ${encrypted}\n - Signed: ${signed}\n`); + } +})();