SecurityInnovation / PGPy / 648

98%

master: 95%

Pull #285

travis-ci

handle and generate Intended Recipient subpackets

See https://gitlab.com/openpgp-wg/rfc4880bis/merge_requests/19 and
https://0xacab.org/schleuder/schleuder/issues/158 for more details
about this subpacket.

The simplest way to use this when generating a message in PGPy is:

```
msg = PGPMessage.new('test message')
msg |= alice.sign(msg, intended_recipients=[bob])
msg = bob.encrypt(msg)
```

And it can be checked on Bob's side with:

```
cleartext = bob.decrypt(msg)
for sigvfy in alice.verify(cleartext).good_signatures:
    if bob.fingerprint in sigvfy.signature.intended_recipients:
        print("meant for Bob")
```

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>

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