35. Opad_it

35.1. Function description:

This demo shows how to trigger hmac opad key input request interrupt.

Enable global interrupt & register HASH interrupt.
Enable the related interrupt.
Configure the HMAC and start hmac operation, including short key that is less than one block size & long key that is greater than one block size test. after enable the hmac and write fifo normally will trigger the interrupt.
Waiting trigger the related interrupt and enter interrupt serve function.

Note

Using packaged function: HMAC_SHA224 to realize hmac opearion, more information to see the comments about the function.

Algorithm	Mode	DMA	Data Type
sha224	hmac	disable	no swap

If successfully trigger and enter interrupt service routine, then print pass, if not print fail.

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