Basic Encryption On Android

I have seen the example here. All well and good and I understand it, however it relies on the bounceycastle library for the provider. I don't want to bundle any additional third pa

Solution 1:

Well BouncyCastle is included in Android, as you can see if you would try to include it you would get: D/dalvikvm( 9268): DexOpt: not verifying 'Lorg/bouncycastle/x509/extension/SubjectKeyIdentifierStructure;': multiple definitions and so on.

However, not all algorithms are implemented - you would get an NoSuchAlgorithmException. In Android 2.2 I found these to be implemented:

PBEWITHSHAAND128BITAES-CBC-BC PBEWITHSHAAND3-KEYTRIPLEDES-CBC 1.2.840.113549.1.1.7 PBEWITHSHA256AND256BITAES-CBC-BC PBEWITHSHAAND192BITAES-CBC-BC DESEDE DES 1.2.840.113549.3.7 PBEWITHSHAAND2-KEYTRIPLEDES-CBC 1.3.14.3.2.7 PBEWITHSHA256AND192BITAES-CBC-BC PBEWITHSHAAND256BITAES-CBC-BC PBEWITHSHAAND40BITRC2-CBC AES 2.16.840.1.101.3.4.1.42 PBEWITHSHA256AND128BITAES-CBC-BC 2.16.840.1.101.3.4.1.22 2.16.840.1.101.3.4.1.2

Solution 2:

I don't want to bundle any additional third party libraries with my app if I can help it.

You do not need third party libraries to use javax.crypto. There are online samples of using javax.crypto, such as this and this. If you need a Base64 encoder, there is one in Android 2.2, or there are open source implementations available for that as well.