[android-developers] Using Bouncy Castle with an Android app

Has anyone managed to use Bouncy Castle in one of their apps? I need
to be able to do detailed manipulations of x509 certificates (generate
CSRs, generate key pairs, convert between different certificate
formats, etc.), and BC seems the best way to do that.

I have tried putting the bcprov library in to my project, and then
just using BC like I normally would. When the app is installed, a
large number of "DexOpt: not verifying"... messages pop up. I suspect
this is because BC is already used in Android. However, when I make
calls to certain methods in certain classes, I get errors like this :

java.lang.ClassCastException: org.bouncycastle.asn1.DERSequence

I suspect this is because of ambiguity between the classes that are
included in the OS, and the ones in my project.

Is there any way to get around this? Maybe tell my program to use the
BC library that is included with it and ignore the one included in the
OS?

Or, could I get around this by making sure that I am using the same
version that is included in the OS? (Or, in a nutshell, is the
ClassCastException likely to be a problem because the parameters
defined for the same method names don't match?)

Thanks for any help!

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