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Dominik Schürmann 2013-09-10 12:46:57 +02:00
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@ -72,6 +72,58 @@ OpenPGP Keychain specific Intent actions:
To do asyncronous fast encryption/decryption/sign/verify operations bind to the remote service.
The API Demo contains all required AIDL files and a demo activity.
TL;DR:
Try out the new OpenPGP Keychain API:
Keychain:
https://play.google.com/stor/apps/details?id=org.sufficientlysecure.keychain
API Demo:
https://play.google.com/stor/apps/details?id=org.sufficientlysecure.keychain.demo
(also send to guardian-dev mailinglist)
Long version:
As discussed previously I now present my new Crypto API that I propose
for integration into k9mail. All apps wanting to use this generic API
just need to include the AIDL files and connect to the service. Other
crypto apps can implement a service based on this AIDL definition.
Design
------
The API is designed to be as easy as possible to use by apps like
k9mail. The service definition defines
sign/encrypt/signAndEncrypt/decryptAndVerify [1].
As can be seen the apps themselves never need handle key ids directly.
Only user ids (emails) are used to define recipients. If more than one
pub key exists for an email, OpenPGP Keychain will handle the problem by
showing a selection screen.
Also app devs never need to fiddle with private keys. On first
operation, OpenPGP Keychain shows an activity to allow or disallow
access, while also allowing to choose the private key used for this app.
Please try the Demo app out to see how it works [4].
Integration
-----------
The API is defined as AIDL interfaces in org.openintents.crypto packge
[2]. All files from [2] needs to be included in the project.
Using the CryptoServiceConnection.java [3] you can choose to which
crypto provider you want to connect (other pgp apps can implement the
interfaces). They can be queried as shown in the demo app (see [3] how
to query). If other crypto apps implement the service, no additional
code is required in k9mail per provider. See [3] for a complete example
for integration.
ToDos
-----
- error handling needs improvements
- signature results needs improvements (should also contain email address)
- Integration in k9mail
[1] https://github.com/dschuermann/openpgp-keychain/blob/master/OpenPGP-Keychain-API-Demo/src/org/openintents/crypto/ICryptoService.aidl
[2] https://github.com/dschuermann/openpgp-keychain/tree/master/OpenPGP-Keychain-API-Demo/src/org/openintents/crypto
[3] https://github.com/dschuermann/openpgp-keychain/blob/master/OpenPGP-Keychain-API-Demo/src/org/openintents/crypto/CryptoServiceConnection.java
[3] https://github.com/dschuermann/openpgp-keychain/blob/master/OpenPGP-Keychain-API-Demo/src/org/sufficientlysecure/keychain/demo/CryptoProviderDemoActivity.java
[4] https://play.google.com/stor/apps/details?id=org.sufficientlysecure.keychain.demo
### Tutorial
1. Include all files from https://github.com/dschuermann/openpgp-keychain/tree/master/OpenPGP-Keychain-API-Demo/src/org/openintents/crypto
2. An example how to query for all available crypto providers: https://github.com/dschuermann/openpgp-keychain/blob/master/OpenPGP-Keychain-API-Demo/src/org/sufficientlysecure/keychain/demo/CryptoProviderDemoActivity.java