Any plan to add the BN_MONT_CTX family of functions?

[hhanh00]

I think they would help speed up some custom ECC functions.

[aido]

I am having issue with this also.

Speculos fails to implement cx_mont_init2() and cx_mont_init() causing my app to crash during testing. I am sure that if my app had continued without crashing I would also find that Speculos does not implement cx_mont_mul() either.

It is quite an inconvenience not being able to test with Speculos the apps that use these functions.

The OpenSSL library that is part of Speculos comes with functions like BN_MONT_CTX_init() and BN_mod_mul_montgomery() that would help with fxing this issue.

[aido]

It looks like someone has done some work on this already:

https://github.com/LedgerHQ/cylib/blob/master/wrappers/bolos/cy_wrap_fp_bolos.c

https://github.com/LedgerHQ/cylib/blob/master/tests/cy_test_mulmontgomery.c

Can some of this code be used for inspiration?