chore: sign document

packages/signing/transports/local-cert.ts

@@ -0,0 +1,32 @@
+import signer from 'node-signpdf';
+import fs from 'node:fs';
+
+import { addSigningPlaceholder } from '../helpers/addSigningPlaceholder';
+
+export type SignWithLocalCertOptions = {
+  pdf: Buffer;
+};
+
+export const signWithLocalCert = async ({ pdf }: SignWithLocalCertOptions) => {
+  const pdfWithPlaceholder = await addSigningPlaceholder({ pdf });
+
+  let p12Cert: Buffer | null = null;
+
+  if (process.env.NEXT_PRIVATE_SIGNING_LOCAL_FILE_CONTENTS) {
+    p12Cert = Buffer.from(process.env.NEXT_PRIVATE_SIGNING_LOCAL_FILE_CONTENTS, 'base64');
+  }
+
+  if (!p12Cert) {
+    p12Cert = Buffer.from(
+      fs.readFileSync(process.env.NEXT_PRIVATE_SIGNING_LOCAL_FILE_PATH || './example/cert.p12'),
+    );
+  }
+
+  if (process.env.NEXT_PRIVATE_SIGNING_PASSPHRASE) {
+    return signer.sign(pdfWithPlaceholder, p12Cert, {
+      passphrase: process.env.NEXT_PRIVATE_SIGNING_PASSPHRASE,
+    });
+  }
+
+  return signer.sign(pdfWithPlaceholder, p12Cert);
+};