fix: support passphrase env var

.env.example

@@ -18,6 +18,7 @@ NEXTAUTH_URL='http://localhost:3000'
 
 # SIGNING
 CERT_FILE_PATH=
+CERT_PASSPHRASE=
 
 # MAIL (NODEMAILER)
 # SENDGRID

packages/signing/addDigitalSignature.ts

@@ -61,7 +61,7 @@ export const addDigitalSignature = async (documentAsBase64: string): Promise<str
 
   const signObj = new signer.SignPdf();
   const signedPdfBuffer: Buffer = signObj.sign(modifiedPdfBuffer, p12Buffer, {
-    passphrase: "",
+    passphrase: process.env.CERT_PASSPHRASE || "",
   });
 
   return signedPdfBuffer.toString("base64");