Using the ECC508 chip directly?

Hardware MKR Family MKR1000
4

I also need to talk to the ECC508 chip to perform RSA decryption.
I've found a library for the WiFI module which also includes crypthography functions such as the modular exponentiation for large integers, which is the one I need.

Will this work? I think it's worth a shot.

Also, I'm, curious about what SurfindDude said: "pity though that the data path takes the SPI through the M0 instead of directly to the WINC1500."

Does this mean the SPI interface is not usable for something else? I need to talk to an Adafruit PN532 (na NFC breakout board) via SPI. Will I be able to use both the chip and the breakout board?