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 party libraries with my app if I can help it. I don't need fort knox style security, just some basic symmetric encryption for transmitting over the wire. How can I do basic encryption on Android with out third party libraries?
thanks
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.
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