Jeff Epler ab5eb86118 raspberrypi: implement os.urandom ... Since the datasheet cast some doubt on the strength of the "rosc_hw->randombit", I use the SHA256 hash function to create a high quality random seed from random values of uncertain entropy, as well as to generate a sequence of random values from that seed using SHA256 as a cryptographically-secure random number generator. In practice, it produces over 100kB/s of random data which does not have any gross problems according to _PractRand_.		2021-02-17 17:49:25 -06:00
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sha256.c	raspberrypi: implement os.urandom	2021-02-17 17:49:25 -06:00
sha256.h	extmod/moduhashlib: Add namespace prefix for crypto-algorithms/sha256.h.	2015-12-20 23:14:47 +02:00