n8n-nodes-pgp

A comprehensive N8N community node for seamless integration of PGP (Pretty Good Privacy) encryption functionalities into n8n workflows. Encrypt, decrypt, sign, and verify messages effortlessly with OpenPGP standard support.

OpenPGP is a standard for encryption and signing of data.

n8n is a fair-code licensed workflow automation platform.

🚀 Features

• ✅ 6 Core Operations: Encrypt, Decrypt, Sign, Verify, Encrypt-And-Sign, Decrypt-And-Verify
• ✅ Text & Binary Support: Handle both text messages and binary files
• ✅ Embedded Signatures: Support for embedded signatures in encrypted messages
• ✅ Compression Support: Automatic compression for binary files
• ✅ Secure Credentials: Password-protected key management
• ✅ TypeScript Support: Full type definitions and IntelliSense
• ✅ High Test Coverage: 98.93% code coverage with comprehensive unit tests

📦 Installation

Method 1: NPM Installation (Recommended)

npm install @luka-cat-mimi/n8n-nodes-pgp

Method 2: Manual Installation

1. Clone or download the project to your local machine
2. Install dependencies and build the project

pnpm install
pnpm build

3. Copy the compiled files to N8N's custom directory

Follow the installation guide in the n8n community nodes documentation for detailed instructions.

⚙️ Configuration

Credentials Setup

To authenticate with this node, you need to provide the following credentials:

Field	Description	Example	Required
Passphrase	The passphrase for the private key	your-secure-passphrase	❌
Public Key	Armored public key for encryption and verification	-----BEGIN PGP PUBLIC KEY BLOCK-----...	❌
Private Key	Armored private key for decryption and signing	-----BEGIN PGP PRIVATE KEY BLOCK-----...	❌

Note: All credential fields are optional, but you'll need at least a Public Key for encryption/verification operations and a Private Key (with optional Passphrase) for decryption/signing operations.

Getting PGP Keys

You can generate PGP keys using various tools:

• GPG Command Line: gpg --gen-key and gpg --export / gpg --export-secret-keys
• Online Tools: Various web-based PGP key generators
• OpenPGP.js: Use the OpenPGP.js library directly

📊 Operations

Core Operations

Operation	Description	Input Type	Output Type
Encrypt	Encrypts text or binary files using a public key. Binary files can be compressed before encryption.	Text/Binary	Encrypted Message
Decrypt	Decrypts text or binary files using a private key. Compressed files are automatically decompressed after decryption.	Encrypted Message	Text/Binary
Sign	Creates a digital signature for text or binary files using a private key.	Text/Binary	Signature
Verify	Checks if a digital signature is valid for text or binary files using a public key.	Text/Binary + Signature	Verification Result
Encrypt-And-Sign	Encrypts and signs text or binary files in one step. Supports both detached and embedded signatures.	Text/Binary	Encrypted Message + Signature
Decrypt-And-Verify	Decrypts and verifies text or binary files in one step. Supports both detached and embedded signatures.	Encrypted Message + Signature	Text/Binary + Verification Result

Embedded Signatures

The Encrypt-And-Sign and Decrypt-And-Verify operations support embedded signatures:

• Embed Signature (Encrypt-And-Sign): When enabled, the signature is embedded within the encrypted message rather than provided as a separate output. This creates a standard OpenPGP message format that includes both encryption and signature verification in a single message.
• Embedded Signature (Decrypt-And-Verify): When enabled, the node expects the message to contain an embedded signature and will automatically verify it during decryption. No separate signature input is required.

By default, both options are disabled to maintain backward compatibility with existing workflows that use detached signatures.

🛠️ Usage Examples

Basic Usage

1. Add PGP Node to your workflow
2. Select Operation (e.g., "Encrypt", "Decrypt", "Sign", "Verify")
3. Configure Credentials: Set up your PGP credentials with Public/Private keys
4. Configure Parameters:
   • Select input data type (Text or Binary)
   • For binary operations, choose compression options if needed
   • For signature operations, configure embedded/detached signature options

Encrypt Text Example

1. Select Operation: "Encrypt"
2. Input Type: "Text"
3. Input Data: Your plain text message
4. Public Key: Recipient's public key (from credentials)
5. The output will be an encrypted armored message

Decrypt Text Example

1. Select Operation: "Decrypt"
2. Input Type: "Text"
3. Input Data: Encrypted armored message
4. Private Key: Your private key (from credentials)
5. Passphrase: Your passphrase if the key is encrypted
6. The output will be the decrypted plain text

Sign and Verify Example

1. Signing:

   • Select Operation: "Sign"
   • Input Type: "Text" or "Binary"
   • Input Data: Your message
   • Private Key: Your private key
   • Passphrase: Your passphrase
   • Output: Digital signature

2. Verification:

   • Select Operation: "Verify"
   • Input Data: Original message
   • Signature: Digital signature from signing step
   • Public Key: Signer's public key
   • Output: Verification result (valid/invalid)

Encrypt-And-Sign Example

1. Select Operation: "Encrypt-And-Sign"
2. Input Type: "Text"
3. Input Data: Your message
4. Public Key: Recipient's public key (for encryption)
5. Private Key: Your private key (for signing)
6. Embed Signature: Enable if you want embedded signature
7. Output: Encrypted message (with optional embedded signature) + separate signature (if detached)

🔧 Development

Project Structure

n8n-nodes-pgp/
├── credentials/                 # Credential definitions
│   ├── PgpCredentialsApi.credentials.ts
│   └── key.svg
├── nodes/                      # Node definitions
│   └── PgpNode/
│       ├── PgpNode.node.ts
│       ├── key.svg
│       └── utils/              # Utility functions
│           ├── BinaryUtils.ts
│           ├── DataCompressor.ts
│           └── operations.ts
├── tests/                      # Unit tests
│   ├── binary-utils.test.ts
│   ├── data-compressor.test.ts
│   ├── encrypt.test.ts
│   ├── sign.test.ts
│   └── embedded-signature.test.ts
├── dist/                       # Compiled output
├── package.json
├── tsconfig.json
└── gulpfile.js

Build Commands

# Development mode (watch for file changes)
pnpm dev

# Build
pnpm build

# Run tests
pnpm test

# Run tests with coverage
pnpm coverage

# Watch tests
pnpm test:watch

# Lint code
pnpm lint

# Fix linting issues
pnpm lintfix

# Format code
pnpm format

📊 Test Results

This section displays the results of unit tests for each operation, based on a live n8n instance.

Operation	Last Tested	Status
Encrypt (Text)	2025-12-03	✅ Success
Decrypt (Text)	2025-12-03	✅ Success
Sign (Text)	2025-12-03	✅ Success
Verify (Text)	2025-12-03	✅ Success
Encrypt (Binary)	2025-12-03	✅ Success
Decrypt (Binary)	2025-12-03	✅ Success
Sign (Binary)	2025-12-03	✅ Success
Verify (Binary)	2025-12-03	✅ Success

Unit Tests

Unit tests can be executed with the following command:

pnpm test

Test Results

binary-utils.test.ts

• Convert text data to base64 string
• Convert base64 string back to text data
• Convert binary data to base64 string
• Convert base64 string back to binary data

sign.test.ts

• Signs and verifies text message
• Signs and verifies text message with encrypted private key
• Verify fails with a different keypair
• Signs binary data
• Verify fails with a different keypair

data-compressor.ts

• Compresses and decompresses with zlib
• Compresses and decompresses with zip
• Throws an error for unsupported algorithm during compression
• Throws an error for unsupported algorithm during decompression

encrypt.test.ts

• Encrypts and decrypts a text message
• Encrypts and decrypts a text message with encrypted private key
• Decryption fails with a different private key
• Encrypts and decrypts a binary file
• Binary decryption fails with a different private key
• Encrypts and decrypts a compressed binary file

embedded-signature.test.ts

• Encrypts and decrypts text with embedded signature
• Encrypts and decrypts text with embedded signature using encrypted private key
• Decrypt fails with wrong private key but embedded signature verification still works
• Encrypts and decrypts binary with embedded signature
• Encrypts and decrypts binary with embedded signature using encrypted private key
• Backward compatibility: detached signature still works
• Embedded signature verification fails with wrong public key
• Handle invalid messages gracefully
• Handle messages without signatures gracefully

Code Coverage:

• Statements: 98.93%
• Branches: 100%
• Functions: 100%
• Lines: 98.91%

🤝 Contributing

Contributions are welcome! Please feel free to submit Issues and Pull Requests.

Contribution Guidelines

1. Fork the project
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

📝 License

This project is licensed under the MIT License. See the LICENSE.md file for details.

🆘 Support

• 📧 Email: dengxiaomei714@gmail.com
• 🐛 Issue Tracker: GitHub Issues
• 📖 OpenPGP.js Documentation: openpgpjs.org
• 📖 n8n Community Nodes Documentation: n8n Docs

⭐ Acknowledgments

This project is developed based on the original repository hapheus/n8n-nodes-pgp. Special thanks to the original author Franz Haberfellner for creating this excellent PGP integration for n8n.

We also thank:

• N8N for providing the powerful automation platform
• OpenPGP.js for the robust OpenPGP implementation

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If this project helps you, please give it a ⭐️!