Are there functions like BigInteger.modPow, modMul in JavaCard?

[shibulijack]

I am trying to implement my own Encryption Algorithm. Are there functions like BigInteger.modPow, modMul in JavaCard. And are there any libraries to do this?

[kurihan]

There is no BigInteger mod in Java Card.

[mabel]

Maybe you can try to use BigNat library.

[vasilis]

Apologies for digging an old thread out.

Just wanted to mention JCMathLib, which (among others) provides a big number class and modulo operations.

We have our source code and documentation here: https://opencryptojc.org

[UNKNwYSHSA]

You can ask card provider to implemente BigInteger functions into CardOS.
JavaCardOS can do that. You can contact them for your requirement. (Through email: javacardos@gmail.com)

[zxt12300]

some API methonds have been provided in JAVACARD 3.0 , such as javacardx.framework.math