refactor: replace pdf-sign with libpdf/core for PDF operations (#2403)

Migrate from @documenso/pdf-sign and @cantoo/pdf-lib to @libpdf/core
for all PDF manipulation and signing operations. This includes:

- New signing transports for Google Cloud KMS and local certificates
- Consolidated PDF operations using libpdf API
- Added TSA (timestamp authority) helper for digital signatures
- Removed deprecated flatten and insert utilities
- Updated tests to use new PDF library
This commit is contained in:
Lucas Smith
2026-01-21 15:16:23 +11:00
committed by GitHub
parent ed7a0011c7
commit 9035240b4d
37 changed files with 1065 additions and 1468 deletions
@@ -291,10 +291,13 @@ For AI setup specifics, see the [AI Recipient & Field Detection (Self-hosting)](
| `NEXT_PUBLIC_SUPPORT_EMAIL` | The support email address displayed to users (default `support@documenso.com`). |
| `NEXT_PRIVATE_DATABASE_URL` | The URL for the primary database connection (with connection pooling). |
| `NEXT_PRIVATE_DIRECT_DATABASE_URL` | The URL for the direct database connection (without connection pooling). |
| `NEXT_PRIVATE_SIGNING_TRANSPORT` | The signing transport to use. Available options: local (default) |
| `NEXT_PRIVATE_SIGNING_TRANSPORT` | The signing transport to use. Available options: local (default), gcloud-hsm |
| `NEXT_PRIVATE_SIGNING_PASSPHRASE` | The passphrase for the key file. |
| `NEXT_PRIVATE_SIGNING_LOCAL_FILE_CONTENTS` | The base64-encoded contents of the key file will be used instead of the file path. |
| `NEXT_PRIVATE_SIGNING_LOCAL_FILE_PATH` | The path to the key file, default `/opt/documenso/cert.p12`. |
| `NEXT_PRIVATE_SIGNING_TIMESTAMP_AUTHORITY` | Comma-separated list of timestamp authority URLs for PDF signing. Enables LTV and archival timestamps. |
| `NEXT_PUBLIC_SIGNING_CONTACT_INFO` | Contact info to embed in PDF signatures. Defaults to the webapp URL. |
| `NEXT_PRIVATE_USE_LEGACY_SIGNING_SUBFILTER` | Set to "true" to use the legacy adbe.pkcs7.detached subfilter instead of ETSI.CAdES.detached. |
| `NEXT_PUBLIC_UPLOAD_TRANSPORT` | The transport for file uploads (database or s3). |
| `NEXT_PRIVATE_UPLOAD_ENDPOINT` | The endpoint for the S3 storage transport (for third-party S3-compatible providers). |
| `NEXT_PRIVATE_UPLOAD_FORCE_PATH_STYLE` | Whether to force path-style URLs for the S3 storage transport. |
@@ -53,15 +53,21 @@ Have the Certificate Authority sign the Certificate Signing Request.
Configure your instance to use the new certificate by configuring the following environment variables in your `.env` file:
| Environment Variable | Description |
| :-------------------------------------------------------------- | :---------------------------------------------------------------------------------------------------------------------------------------- |
| `NEXT_PRIVATE_SIGNING_TRANSPORT` | The transport used for document signing. Available options: local (default), gcloud-hsm |
| `NEXT_PRIVATE_SIGNING_PASSPHRASE` | The passphrase for the local file-based signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_LOCAL_FILE_PATH` | The local file path to the .p12 file to use for the local signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_LOCAL_FILE_CONTENTS` | The base64-encoded contents of the .p12 file to use for the local signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_GCLOUD_HSM_KEY_PATH` | The Google Cloud HSM key path for the gcloud-hsm signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_GCLOUD_HSM _PUBLIC_CRT_FILE_PATH` | The path to the Google Cloud HSM public certificate file to use for the gcloud-hsm signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_GCLOUD_HSM _PUBLIC_CRT_FILE_CONTENTS` | The base64-encoded contents of the Google Cloud HSM public certificate file for the gcloud-hsm signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_GCLOUD_ APPLICATION_CREDENTIALS_CONTENTS` | The Google Cloud Credentials file path for the gcloud-hsm signing transport. This field is optional. |
| Environment Variable | Description |
| :------------------------------------------------------------- | :---------------------------------------------------------------------------------------------------------------------------------------- |
| `NEXT_PRIVATE_SIGNING_TRANSPORT` | The transport used for document signing. Available options: local (default), gcloud-hsm |
| `NEXT_PRIVATE_SIGNING_PASSPHRASE` | The passphrase for the local file-based signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_LOCAL_FILE_PATH` | The local file path to the .p12 file to use for the local signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_LOCAL_FILE_CONTENTS` | The base64-encoded contents of the .p12 file to use for the local signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_GCLOUD_HSM_KEY_PATH` | The Google Cloud HSM key path for the gcloud-hsm signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_GCLOUD_HSM_PUBLIC_CRT_FILE_PATH` | The path to the Google Cloud HSM public certificate file to use for the gcloud-hsm signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_GCLOUD_HSM_PUBLIC_CRT_FILE_CONTENTS` | The base64-encoded contents of the Google Cloud HSM public certificate file for the gcloud-hsm signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_GCLOUD_APPLICATION_CREDENTIALS_CONTENTS` | The base64-encoded Google Cloud Credentials for the gcloud-hsm signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_GCLOUD_HSM_CERT_CHAIN_FILE_PATH` | The path to the certificate chain file for the gcloud-hsm signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_GCLOUD_HSM_CERT_CHAIN_CONTENTS` | The base64-encoded contents of the certificate chain for the gcloud-hsm signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_GCLOUD_HSM_SECRET_MANAGER_CERT_PATH` | The Google Secret Manager path to retrieve the certificate for the gcloud-hsm signing transport. This field is optional. |
| `NEXT_PRIVATE_SIGNING_TIMESTAMP_AUTHORITY` | Comma-separated list of timestamp authority URLs for PDF signing. Enables LTV and archival timestamps. This field is optional. |
| `NEXT_PUBLIC_SIGNING_CONTACT_INFO` | Contact info to embed in PDF signatures. Defaults to the webapp URL. This field is optional. |
| `NEXT_PRIVATE_USE_LEGACY_SIGNING_SUBFILTER` | Set to "true" to use the legacy adbe.pkcs7.detached subfilter instead of ETSI.CAdES.detached. This field is optional. |
</Steps>
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