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6 Commits

Author SHA1 Message Date
Angus Gratton
17adb40ca8 bootloader: Calculate SHA256 hash of image on every boot 
Makes app image booting more reliable (256-bit rather than 8-bit verification.)

Some measurements, time to boot a 655KB app.bin file and run to app_main() execution.

(All for rev 1 silicon, ie no 340ms spurious WDT delay.)

80MHz QIO mode:
before = 300ms
after = 140ms

40MHz DIO mode:
before = 712ms
after = 577ms

40MHz DIO mode, secure boot enabled
before = 1380ms
after = 934ms

(Secure boot involves two ECC signature verifications (partition table, app) that take approx 300ms each with 80MHz CPU.)
 2017-07-19 18:31:59 +10:00
Angus Gratton
43b99edf2b bootloader: Calculate SHA-256 of image while loading/verifying 2017-07-19 18:25:17 +10:00
Angus Gratton
3922ce47b2 bootloader: Enable early boot RNG entropy source 
This reverts commit ceb85669702f01f3e30ddfcdd841dfe64e1a597c.
 2017-01-04 17:07:12 +11:00
Angus Gratton
9eb135fd73 Flash encryption: Support enabling flash encryption in bootloader, app support 
* App access functions are all flash encryption-aware
* Documentation for flash encryption
* Partition read/write is flash aware
* New encrypted write function
 2016-12-01 23:49:12 -08:00
Angus Gratton
e459f803da secure boot: Functional partition table & app signature verification 2016-11-14 11:08:42 +11:00
Angus Gratton
aceb6517c0 Refactor existing bootloader common functionality into bootloader_support component 2016-11-02 17:58:41 +11:00