COLDCARD firmware PR #690 patch
coldcard-firmware-pr-690-patch
- Organisation
- Coinkite
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- Repository patch
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- Source changes
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Patch content for the merged Edge hotfix. Kept separately from the pull-request conversation capture.
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From c66e095e1efa61ee00d1b537cbd65ced5ddeb34c Mon Sep 17 00:00:00 2001 From: scgbckbone <[email protected]> Date: Fri, 31 Jul 2026 13:23:49 +0200 Subject: [PATCH 01/23] Use hardware RNG for Mk and Q libngu --- stm32/COLDCARD_MK4/mpconfigboard.h | 1 + stm32/COLDCARD_MK4/mpconfigboard.mk | 8 +++++++- stm32/COLDCARD_MK4/rng.c | 6 +++++- stm32/COLDCARD_MK4/rng.h | 3 ++- stm32/COLDCARD_Q1/mpconfigboard.mk | 6 ++++++ stm32/shared.mk | 22 ++++++++++++++++++++++ 6 files changed, 43 insertions(+), 3 deletions(-) diff --git a/stm32/COLDCARD_MK4/mpconfigboard.h b/stm32/COLDCARD_MK4/mpconfigboard.h index 4933d9cb5..b3ccb7c7c 100644 --- a/stm32/COLDCARD_MK4/mpconfigboard.h +++ b/stm32/COLDCARD_MK4/mpconfigboard.h @@ -75,6 +75,7 @@ // We have our own version of this code. +// LATER: when zero, this selected some PRNG code we really didnt want. #define MICROPY_HW_ENABLE_RNG (0) extern void ckcc_early_init(void); diff --git a/stm32/COLDCARD_MK4/mpconfigboard.mk b/stm32/COLDCARD_MK4/mpconfigboard.mk index 07d59743d..822a7bac6 100644 --- a/stm32/COLDCARD_MK4/mpconfigboard.mk +++ b/stm32/COLDCARD_MK4/mpconfigboard.mk @@ -92,7 +92,13 @@ build-COLDCARD_MK4/flashbdev.o: CFLAGS += -Dled_state=led_state_OMIT build-COLDCARD_MK4/spibdev.o: CFLAGS += -Dled_state=led_state_OMIT build-COLDCARD_MK4/factoryreset.o: CFLAGS += -Dled_state=led_state_OMIT build-COLDCARD_MK4/boardctrl.o: CFLAGS += -Dled_state=led_state_OMIT - + +# Do not compile MicroPython's fallback PRNG. The board-specific rng.c +# provides rng_get(), and this empty object satisfies the upstream object list. +$(BUILD)/rng.o: CFLAGS += -Dpyb_rng_yasmarang=error-do-not-want-this +$(BUILD)/rng.o: $(BOARD_DIR)/mpconfigboard.mk + $(ECHO) "SKIP stm32/rng.c" + $(Q)$(CC) $(CFLAGS) -x c -c /dev/null -o $@ files: # SRC_C: $(SRC_C) diff --git a/stm32/COLDCARD_MK4/rng.c b/stm32/COLDCARD_MK4/rng.cExcerpt only. The complete copy is held offline and backs quotations on this site. The original publication remains the canonical public source.
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