Throw when parsing v6 keys using legacy curve25519

src/packet/public_key.js

@@ -124,6 +124,17 @@ class PublicKeyPacket {
 
       // - A series of values comprising the key material.
       const { read, publicParams } = crypto.parsePublicKeyParams(this.algorithm, bytes.subarray(pos));
+      // The deprecated OIDs for Ed25519Legacy and Curve25519Legacy are used in legacy version 4 keys and signatures.
+      // Implementations MUST NOT accept or generate v6 key material using the deprecated OIDs.
+      if (
+        this.version === 6 &&
+        publicParams.oid && (
+          publicParams.oid.getName() === enums.curve.curve25519Legacy ||
+          publicParams.oid.getName() === enums.curve.ed25519Legacy
+        )
+      ) {
+        throw new Error('Legacy curve25519 cannot be used with v6 keys');
+      }
       this.publicParams = publicParams;
       pos += read;
 

test/general/signature.js

@@ -1089,25 +1089,23 @@ eSvSZutLuKKbidSYMLhWROPlwKc2GU2ws6PrLZAyCAel/lU=
     // signature with salt shorter than expected
     const armoredMessage = `-----BEGIN PGP MESSAGE-----
 
-xEQGAQoWHgTCf3OkPcYPPB6GmoMeaOz1wYXbuSvHxW/PVbRIynPv5yU3YApt
-KDJPb4mCbmxvCoKjGx6CMjDpDsVB+wDFAcsLdQBlEWcKaGVsbG/CmgYBFgoA
-AAApBYJlEWcKIqEGc+/nJTdgCm0oMk9viYJubG8KgqMbHoIyMOkOxUH7AMUA
-AAAA5GYeBMJ/c6Q9xg88Hoaagx5o7PXBhdu5K8fFb89VtEjKAQCW/XwAPo2V
-ugvc1634oGA/74j7KonU2qdl0LvxVJuB2wEAtutHh3wry/SNkc+japCGO4u4
-XjIVmkzQNtymmOECUwI=
+xDQGAQgbDpdDiCIrq6YZAf5vD3wFIucHRyMNlExatdj6sQcW2FA/vV5eZGCv
+mBUS4Mqqki4ByxR1AGUddyNUaGlzIGlzIHNpZ25lZMKGBgEbCAAAACkFgmUd
+dyMioQYi5wdHIw2UTFq12PqxBxbYUD+9Xl5kYK+YFRLgyqqSLgAAAADZ9w6X
+Q4giK6umGQH+bw98BS96KSXxW39Ue6hNxbSoc5xOqYnTsD+75FYdR1U9fco/
+HDpH7axPa2euIDpwT60NedSjcTx7C9Sots4mTvjMwQQ=
 -----END PGP MESSAGE-----`;
     const key = await openpgp.readKey({ armoredKey: `-----BEGIN PGP PRIVATE KEY BLOCK-----
 
-xVoGZRFjtxYAAAAtCSsGAQQB2kcPAQEHQJRcfAi8wlCCWAeBcvpRO6iL5YK8
-1e8BVcOkAGVXKDguAAEAxIUb1xswIKPfVEyOZkqSFukVOegoArxIeEuDaoK0
-feXCrQYfFgoAAAA6BYJlEWO3AwsJBwMVCAoCFgACmwMCHgEioQZz7+clN2AK
-bSgyT2+Jgm5sbwqCoxsegjIw6Q7FQfsAxQAAAACBKyDA5Ih9cWlc9o5NUzmo
-jSCtKhy54bBzfRX0t9Jha4BfZwD9FvmhOEpJAnYRDmBrEiaO4okM3D6eNZz9
-rmGZkLT9oJMBAI6UbwsjgWw42W85Kb57tfYdF/779TrLHcNRZLNV0p8NzQDC
-nwYQFgoAAAAsBYJlEWO3AhkBIqEGc+/nJTdgCm0oMk9viYJubG8KgqMbHoIy
-MOkOxUH7AMUAAAAAV2kgOkNvj/g+Q6hFcHcpRFekCUxOons+JgXE+lxuKnbt
-l10BAO7pYlHAee5dxkzQI3WPiiYFt/OYrnr7fT5QadRZhAutAP9n5bvQaoLX
-vfHp79dKJnU1qDnSTEshB7ytt9I3Ze+DAQ==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 -----END PGP PRIVATE KEY BLOCK-----` });
 
     const { signatures } = await openpgp.verify({