OpenPGPCertificate: Allow getting encryption keys by purpose #2236
+85
−7
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The OpenPGP protocol defines two different encryption key flags: ENCRYPT_STORAGE and ENCRYPT_COMMS.
This PR adds methods to select encryption keys of a certificate by passing in key flags as array of masks.
This allows the user to encrypt a message for a specific use-case, such as data in transmission or data at rest.