openpgp.js error case

gistfile1.txt

let encrypted = `
-----BEGIN PGP MESSAGE-----
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=mpqW
-----END PGP MESSAGE-----
`;

let privkey = `
-----BEGIN PGP PRIVATE KEY BLOCK-----
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=5ETO
-----END PGP PRIVATE KEY BLOCK-----
`;

let pubkey = `
-----BEGIN PGP PUBLIC KEY BLOCK-----
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-----END PGP PUBLIC KEY BLOCK-----
`;

let openpgp = require('openpgp');

(async function() {
	const privKeyObj = (await openpgp.key.readArmored(privkey)).keys[0]
	let pubkeys = await openpgp.key.readArmored(pubkey);

	// 7385fc74834e2deb233d2bf0fcf87c69f4f8efc2
	console.log(pubkeys.keys[0].getFingerprint());

	const options = {
			message: await openpgp.message.readArmored(encrypted),
			publicKeys: pubkeys.keys,
			privateKeys: [privKeyObj]
	}

	let result = await openpgp.decrypt(options);
	// fcf87c69f4f8efc2
	console.log(result.signatures[0].keyid.toHex());
	// false
	console.log(result.signatures[0].valid);
	let signature = result.signatures[0].signature;

	let message = openpgp.message.fromText(result.data);
	let result_two = await openpgp.verify({
		message: message,
		publicKeys: pubkeys.keys,
		signature: signature
	});

	// false
	console.log(result.signatures[0].valid);

	// outputs message text, as expected
	// console.log(result.data);
	// console.log(result_two.data);
})();

Thanks for monitoring. It's a test key.

pubkey appears to be missing its silly OpenPGP ASCII-armor checksum of =c9Lv just before the -----END PGP PUBLIC KEY BLOCK----- . Also, pubkey's lines of b64 are longer than 76 chars, which violates RFC 4880 §6.3.

i don't think this is the issue you're trying to point out here, but normalizing pubkey will avoid a distraction for future attempts at running this example.

related openpgpjs issue: openpgpjs/openpgpjs#939

This turned out to be an issue in OpenKeychain, which for P-256 signatures didn't include the correct checksum in the signature packet. Those are not cryptograhpically relevant and GnuPG doesn't mind, but openpgp.js rejects them.