Key doesn't have usage flags

smirandamedallia commented 3 years ago

Hello Team - I tried loading the following public key using the below code but jpgpj thinks it is cannot be used for verification/encryption, the command line thinks otherwise

Using the command line following is displayed

gpg --homedir . pub.key
gpg: WARNING: no command supplied.  Trying to guess what you mean ...
pub   dsa1024 2003-08-04 [SCA]
      18674E841FAA870667950F40DAFD3B909F09F3EF
uid           XXXXXXXXXX <xxx@xxxxxxx.com>
sub   elg1024 2003-08-04 [E]

Using the below code to read the key

Key pubKey = new Key(new File("pub.key"));
        System.out.println(pubKey);
        pubKey.getSubkeys().forEach(sub -> {
            System.out.println(sub.getFingerprint());
            System.out.println("usable for: ");
            System.out.println("sign: " + sub.isUsableForSigning());
            System.out.println("verify: " + sub.isUsableForVerification());
            System.out.println("encryption: " + sub.isUsableForEncryption());
            System.out.println("decryption: " + sub.isUsableForDecryption());
        });

pub    9F09F3EF XXXXXXXXXX <xxx@xxxxxxx.com>
pub    5100C799
18674E841FAA870667950F40DAFD3B909F09F3EF
usable for: 
sign: false
verify: true
encryption: false
decryption: false
CCD406BFCF464CCC57EA030B0A074AC65100C799
usable for: 
sign: false
verify: false
encryption: true
decryption: false

Let me know how this should be handled since it is resulting in the Decryptor failing since it cannot find the appropriate verification key in the Ring

justinludwig commented 3 years ago

@mariuszmagdziarz pointed out in issue #22 that older PGP software didn't include usage flags when generating keys. Looks like that's the case for this key. Try loading it with the org.c02e.jpgpj.key.KeyForVerification class instead of the base Key class.

smirandamedallia commented 3 years ago

Thanks

justinludwig / jpgpj

Key doesn't have usage flags #37