f028026217
- Add `PrivateKey` and `PublicKey` classes. A `PrivateKey` can always be passed where a `PublicKey` key is expected, but not vice versa. - Unexport `Key`, and export `PrivateKey` and `PublicKey`. - Rename `Key.packetlist2structure` to `Key.packetListToStructure`. - Change `Key.update` to return a new updated key, rather than modifying the destination one in place. - Add `openpgp.readPrivateKey` and `openpgp.readPrivateKeys` to avoid having to downcast the result of `readKey(s)` in TypeScript.
78 lines
2.8 KiB
JavaScript
78 lines
2.8 KiB
JavaScript
const openpgp = typeof window !== 'undefined' && window.openpgp ? window.openpgp : require('../..');
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const { readKey, PublicKey, readCleartextMessage, createCleartextMessage, enums, PacketList, SignaturePacket } = openpgp;
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const chai = require('chai');
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chai.use(require('chai-as-promised'));
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const expect = chai.expect;
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async function generateTestData() {
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const victimPrivKey = (await openpgp.generateKey({
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userIDs: [{ name: 'Victim', email: 'victim@example.com' }],
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type: 'rsa',
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rsaBits: 2048,
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subkeys: [{
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sign: true
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}]
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})).key;
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victimPrivKey.revocationSignatures = [];
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const attackerPrivKey = (await openpgp.generateKey({
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userIDs: [{ name: 'Attacker', email: 'attacker@example.com' }],
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type: 'rsa',
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rsaBits: 2048,
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subkeys: [],
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sign: false
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})).key;
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attackerPrivKey.revocationSignatures = [];
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const signed = await openpgp.sign({
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message: await createCleartextMessage({ text: 'I am batman' }),
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signingKeys: victimPrivKey,
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armor: true
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});
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return {
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victimPubKey: victimPrivKey.toPublic(),
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attackerPrivKey,
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signed
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};
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}
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async function testSubkeyTrust() {
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// attacker only has his own private key,
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// the victim's public key and a signed message
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const { victimPubKey, attackerPrivKey, signed } = await generateTestData();
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const pktPubVictim = victimPubKey.toPacketList();
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const pktPubAttacker = attackerPrivKey.toPublic().toPacketList();
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const dataToSign = {
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key: attackerPrivKey.toPublic().keyPacket,
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bind: pktPubVictim[3] // victim subkey
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};
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const fakeBindingSignature = new SignaturePacket();
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fakeBindingSignature.signatureType = enums.signature.subkeyBinding;
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fakeBindingSignature.publicKeyAlgorithm = attackerPrivKey.keyPacket.algorithm;
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fakeBindingSignature.hashAlgorithm = enums.hash.sha256;
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fakeBindingSignature.keyFlags = [enums.keyFlags.signData];
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await fakeBindingSignature.sign(attackerPrivKey.keyPacket, dataToSign);
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const newList = new PacketList();
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newList.push(
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pktPubAttacker[0], // attacker private key
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pktPubAttacker[1], // attacker user
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pktPubAttacker[2], // attacker self signature
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pktPubVictim[3], // victim subkey
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fakeBindingSignature // faked key binding
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);
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let fakeKey = new PublicKey(newList);
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fakeKey = await readKey({ armoredKey: await fakeKey.toPublic().armor() });
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const verifyAttackerIsBatman = await openpgp.verify({
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message: await readCleartextMessage({ cleartextMessage: signed }),
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verificationKeys: fakeKey
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});
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expect(verifyAttackerIsBatman.signatures[0].keyID.equals(victimPubKey.subKeys[0].getKeyID())).to.be.true;
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expect(verifyAttackerIsBatman.signatures[0].valid).to.be.false;
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expect(verifyAttackerIsBatman.signatures[0].error).to.match(/Could not find valid signing key packet/);
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}
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module.exports = () => it('Does not trust subkeys without Primary Key Binding Signature', testSubkeyTrust);
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