Can I encrypt and decrypt a gpg file using this instead of plain data?

[DeveloperXMA]

As you can see, in the example, we are using the dummy data ' Hello World' to encrypt and decrypt.

But in my real case, I have a public key and a private key, and a passphrase, I have a gpg file I need to decrypt as a txt file.

Any idea can I do that using this openpgpjs? If not, can you teach me how to do that in nodeJS?

Right now it's giving me error Error encrypting message: Could not find valid key packet for signing in key ***************

const openpgp = require('openpgp');
const fs = require('fs');
openpgp.initWorker({ path: 'openpgp.worker.js'});

const pubKey = fs.readFileSync('./*****-Pub.asc', 'utf-8');

const privKey = fs.readFileSync('./********-pri.asc', 'utf-8');

const passphrase = `mypassphrase`;

const encryptDecryptFunction = async() => {
  const privKeyObj = openpgp.key.readArmored(privKey).keys[0];
  await privKeyObj.decrypt(passphrase);

  const options = {
    data: 'Hello, World!',                             // input as String (or Uint8Array)
    publicKeys: openpgp.key.readArmored(pubKey).keys,  // for encryption
    privateKeys: [privKeyObj]                          // for signing (optional)
  }

  openpgp.encrypt(options).then(ciphertext => {
    encrypted = ciphertext.data // '-----BEGIN PGP MESSAGE ... END PGP MESSAGE-----'
    return encrypted
  })
    .then(encrypted => {
      const options = {
        message: openpgp.message.readArmored(encrypted),     // parse armored message
        publicKeys: openpgp.key.readArmored(pubkey).keys,    // for verification (optional)
        privateKeys: [privKeyObj]                            // for decryption
      }

      openpgp.decrypt(options).then(plaintext => {
        console.log(plaintext.data)
        return plaintext.data // 'Hello, World!'
      })

    })
}

encryptDecryptFunction();

[twiss]

Your code looks correct; the error is specific to the key you're using. Without having an example key, it's quite hard to figure out what the issue with it is exactly. How did you generate the key? Could you post an example key generated that way?

[twiss]

Let me know if you still have issues.