Ignore third-party revocation signatures

This check was removed in ec22dab.

src/key.js

@@ -1566,8 +1566,19 @@ async function isDataRevoked(primaryKey, dataToVerify, revocations, signature, k
   const normDate = util.normalizeDate(date);
   const revocationKeyIds = [];
   await Promise.all(revocations.map(async function(revocationSignature) {
-    if (!(config.revocations_expire && revocationSignature.isExpired(normDate)) &&
-        (revocationSignature.verified || await revocationSignature.verify(key, dataToVerify))) {
+    if (
+      // Note: a third-party revocation signature could legitimately revoke a
+      // self-signature if the signature has an authorized revocation key.
+      // However, we don't support passing authorized revocation keys, nor
+      // verifying such revocation signatures. Instead, we indicate an error
+      // when parsing a key with an authorized revocation key, and ignore
+      // third-party revocation signatures here. (It could also be revoking a
+      // third-party key certification, which should only affect
+      // `verifyAllCertifications`.)
+      (!signature || revocationSignature.issuerKeyId.equals(signature.issuerKeyId)) &&
+      !(config.revocations_expire && revocationSignature.isExpired(normDate)) &&
+      (revocationSignature.verified || await revocationSignature.verify(key, dataToVerify))
+    ) {
       // TODO get an identifier of the revoked object instead
       revocationKeyIds.push(revocationSignature.issuerKeyId);
       return true;

test/general/key.js

@@ -1258,6 +1258,76 @@ lbjwPj3QUTbLFvHisYzXEQ==
 -----END PGP PUBLIC KEY BLOCK-----
 `;
 
+const key_with_revoked_third_party_cert = `-----BEGIN PGP PUBLIC KEY BLOCK-----
+Comment: GPGTools - https://gpgtools.org
+
+mQENBFS2KSEBCACzz8KtwE5ualmgF+rKo8aPQ9inTQWCNzCuTs3HaSe0D5heGoSh
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+Yzxp9Mp9
+=uVX6
+-----END PGP PUBLIC KEY BLOCK-----
+`;
+
+const certifying_key = `-----BEGIN PGP PUBLIC KEY BLOCK-----
+Comment: GPGTools - https://gpgtools.org
+
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+cKFQz1DDfFCfVpSIJRGozQ==
+=EYzO
+-----END PGP PUBLIC KEY BLOCK-----
+`;
+
 function versionSpecificTests() {
   it('Preferences of generated key', function() {
     const testPref = function(key) {
@@ -1809,6 +1879,26 @@ describe('Key', function() {
     )).to.eventually.equal(openpgp.enums.keyStatus.revoked);
   });
 
+  it('Verify status of key with non-self revocation signature', async function() {
+    const { keys: [pubKey] } = await openpgp.key.readArmored(key_with_revoked_third_party_cert);
+    const [selfCertification] = await pubKey.verifyPrimaryUser();
+    const publicSigningKey = await pubKey.getSigningKey();
+    expect(selfCertification.keyid.toHex()).to.equal(publicSigningKey.getKeyId().toHex());
+    expect(selfCertification.valid).to.be.true;
+
+    const { keys: [certifyingKey] } = await openpgp.key.readArmored(certifying_key);
+    const certifyingSigningKey = await certifyingKey.getSigningKey();
+    const signatures = await pubKey.verifyPrimaryUser([certifyingKey]);
+    expect(signatures.length).to.equal(2);
+    expect(signatures[0].keyid.toHex()).to.equal(publicSigningKey.getKeyId().toHex());
+    expect(signatures[0].valid).to.be.null;
+    expect(signatures[1].keyid.toHex()).to.equal(certifyingSigningKey.getKeyId().toHex());
+    expect(signatures[1].valid).to.be.false;
+
+    const { user } = await pubKey.getPrimaryUser();
+    expect(await user.verifyCertificate(pubKey.primaryKey, user.otherCertifications[0], [certifyingKey])).to.equal(openpgp.enums.keyStatus.revoked);
+  });
+
   it('Evaluate key flags to find valid encryption key packet', async function() {
     const pubKeys = await openpgp.key.readArmored(pub_sig_test);
     expect(pubKeys).to.exist;