fix(core): fix build with FEATURE_FLAGS.SECP256K1_ZKP=False

[no changelog]

core/SConscript.firmware

@@ -10,7 +10,7 @@ UI2 = ARGUMENTS.get('UI2', '0') == '1' or TREZOR_MODEL == '1'
 
 FEATURE_FLAGS = {
     "RDI": True,
-    "SECP256K1_ZKP": True,
+    "SECP256K1_ZKP": True,  # required for trezor.crypto.curve.bip340 (BIP340/Taproot)
     "SYSTEM_VIEW": False,
 }
 

core/SConscript.unix

@@ -9,7 +9,7 @@ TREZOR_MODEL = ARGUMENTS.get('TREZOR_MODEL', 'T')
 UI2 = ARGUMENTS.get('UI2', '0') == '1' or TREZOR_MODEL == '1'
 
 FEATURE_FLAGS = {
-    "SECP256K1_ZKP": True,
+    "SECP256K1_ZKP": True,  # required for trezor.crypto.curve.bip340 (BIP340/Taproot)
 }
 
 CCFLAGS_MOD = ''

core/embed/extmod/modtrezorcrypto/modtrezorcrypto-bip340.h

@@ -17,6 +17,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#if USE_SECP256K1_ZKP
+
 #include "py/objstr.h"
 
 #include "rand.h"
@@ -261,3 +263,5 @@ STATIC const mp_obj_module_t mod_trezorcrypto_bip340_module = {
     .base = {&mp_type_module},
     .globals = (mp_obj_dict_t *)&mod_trezorcrypto_bip340_globals,
 };
+
+#endif

core/embed/extmod/modtrezorcrypto/modtrezorcrypto.c

@@ -38,7 +38,9 @@ static void wrapped_ui_wait_callback(uint32_t current, uint32_t total) {
 
 #include "modtrezorcrypto-aes.h"
 #include "modtrezorcrypto-bip32.h"
+#ifdef USE_SECP256K1_ZKP
 #include "modtrezorcrypto-bip340.h"
+#endif
 #include "modtrezorcrypto-bip39.h"
 #include "modtrezorcrypto-blake256.h"
 #include "modtrezorcrypto-blake2b.h"
@@ -104,7 +106,9 @@ STATIC const mp_rom_map_elem_t mp_module_trezorcrypto_globals_table[] = {
      MP_ROM_PTR(&mod_trezorcrypto_Ripemd160_type)},
     {MP_ROM_QSTR(MP_QSTR_secp256k1),
      MP_ROM_PTR(&mod_trezorcrypto_secp256k1_module)},
+#if USE_SECP256K1_ZKP
     {MP_ROM_QSTR(MP_QSTR_bip340), MP_ROM_PTR(&mod_trezorcrypto_bip340_module)},
+#endif
     {MP_ROM_QSTR(MP_QSTR_sha1), MP_ROM_PTR(&mod_trezorcrypto_Sha1_type)},
     {MP_ROM_QSTR(MP_QSTR_sha256), MP_ROM_PTR(&mod_trezorcrypto_Sha256_type)},
     {MP_ROM_QSTR(MP_QSTR_sha512), MP_ROM_PTR(&mod_trezorcrypto_Sha512_type)},