trezor-firmware/core/embed/lib/image_hash_conf.h

#ifndef LIB_IMAGE_HASH_H_
#define LIB_IMAGE_HASH_H_

#include "model.h"
#include TREZOR_BOARD

#ifdef IMAGE_HASH_SHA256
#include "sha2.h"
#define IMAGE_HASH_DIGEST_LENGTH SHA256_DIGEST_LENGTH
#ifdef USE_HASH_PROCESSOR
#include "hash_processor.h"
#define IMAGE_HASH_CTX hash_sha265_context_t
#define IMAGE_HASH_INIT(ctx) hash_processor_sha256_init(ctx)
#define IMAGE_HASH_UPDATE(ctx, data, len) \
  hash_processor_sha256_update(ctx, data, len)
#define IMAGE_HASH_FINAL(ctx, output) hash_processor_sha256_final(ctx, output)
#define IMAGE_HASH_CALC(data, len, output) \
  hash_processor_sha256_calc(data, len, output)
#else
#define IMAGE_HASH_CTX SHA256_CTX
#define IMAGE_HASH_INIT(ctx) sha256_Init(ctx)
#define IMAGE_HASH_UPDATE(ctx, data, len) sha256_Update(ctx, data, len)
#define IMAGE_HASH_FINAL(ctx, output) sha256_Final(ctx, output)
#define IMAGE_HASH_CALC(data, len, output) sha256_Raw(data, len, output)
#endif

#elif defined IMAGE_HASH_BLAKE2S
#include "blake2s.h"
#define IMAGE_HASH_DIGEST_LENGTH BLAKE2S_DIGEST_LENGTH
#define IMAGE_HASH_CTX BLAKE2S_CTX
#define IMAGE_HASH_INIT(ctx) blake2s_Init(ctx, BLAKE2S_DIGEST_LENGTH)
#define IMAGE_HASH_UPDATE(ctx, data, len) blake2s_Update(ctx, data, len)
#define IMAGE_HASH_FINAL(ctx, output) \
  blake2s_Final(ctx, output, BLAKE2S_DIGEST_LENGTH)
#define IMAGE_HASH_CALC(data, len, output) \
  blake2s(data, len, output, BLAKE2S_DIGEST_LENGTH)
#else
#error "IMAGE_HASH_SHA256 or IMAGE_HASH_BLAKE2S must be defined"
#endif

#endif