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refactor(crypto): use boolean to indicate public key is set

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This commit is contained in:
Ondřej Vejpustek 2024-08-06 16:53:53 +02:00
parent 4868a04107
commit 5912c1e820
4 changed files with 16 additions and 2 deletions
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2
core/embed/extmod/modtrezorcrypto/modtrezorcrypto-bip32.h
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@ -131,8 +131,10 @@ STATIC mp_obj_t mod_trezorcrypto_HDNode_make_new(const mp_obj_type_t *type,
}
if (33 == public_key.len) {
memcpy(o->hdnode.public_key, public_key.buf, 33);
o->hdnode.is_public_key_set = true;
} else {
memzero(o->hdnode.public_key, 33);
o->hdnode.is_public_key_set = false;
}
o->hdnode.curve = curve;

12
crypto/bip32.c
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@ -103,6 +103,7 @@ int hdnode_from_xpub(uint32_t depth, uint32_t child_num,
memzero(out->private_key, 32);
memzero(out->private_key_extension, 32);
memcpy(out->public_key, public_key, 33);
out->is_public_key_set = true;
return 1;
}
@ -136,6 +137,7 @@ int hdnode_from_xprv(uint32_t depth, uint32_t child_num,
memcpy(out->chain_code, chain_code, 32);
memcpy(out->private_key, private_key, 32);
memzero(out->public_key, sizeof(out->public_key));
out->is_public_key_set = false;
memzero(out->private_key_extension, sizeof(out->private_key_extension));
return 1;
}
@ -174,6 +176,7 @@ int hdnode_from_seed(const uint8_t *seed, int seed_len, const char *curve,
memcpy(out->private_key, I, 32);
memcpy(out->chain_code, I + 32, 32);
memzero(out->public_key, sizeof(out->public_key));
out->is_public_key_set = false;
memzero(I, sizeof(I));
return 1;
}
@ -255,6 +258,7 @@ int hdnode_private_ckd_bip32(HDNode *inout, uint32_t i) {
inout->depth++;
inout->child_num = i;
memzero(inout->public_key, sizeof(inout->public_key));
inout->is_public_key_set = false;
// making sure to wipe our memory
memzero(&a, sizeof(a));
@ -329,6 +333,7 @@ int hdnode_public_ckd(HDNode *inout, uint32_t i) {
inout->child_num = i;
inout->public_key[0] = 0x02 | (child.y.val[0] & 0x01);
bn_write_be(&child.x, inout->public_key + 1);
inout->is_public_key_set = true;
// Wipe all stack data.
memzero(&parent, sizeof(parent));
@ -468,7 +473,9 @@ int hdnode_get_address(HDNode *node, uint32_t version, char *addr,
}
int hdnode_fill_public_key(HDNode *node) {
if (node->public_key[0] != 0) return 0;
if (node->is_public_key_set) {
return 0;
}
#if USE_BIP32_25519_CURVES
if (node->curve->params) {
@ -501,6 +508,7 @@ int hdnode_fill_public_key(HDNode *node) {
return 1;
}
#endif
node->is_public_key_set = true;
return 0;
}
@ -750,9 +758,11 @@ static int hdnode_deserialize(const char *str, uint32_t version,
}
memcpy(node->private_key, node_data + 46, 32);
memzero(node->public_key, sizeof(node->public_key));
node->is_public_key_set = false;
} else {
memzero(node->private_key, sizeof(node->private_key));
memcpy(node->public_key, node_data + 45, 33);
node->is_public_key_set = true;
}
node->depth = node_data[4];
if (fingerprint) {

1
crypto/bip32.h
View File

@ -56,6 +56,7 @@ typedef struct {
uint8_t private_key_extension[32];
uint8_t public_key[33];
bool is_public_key_set;
const curve_info *curve;
} HDNode;

3
crypto/cardano.c
View File

@ -143,6 +143,7 @@ int hdnode_private_ckd_cardano(HDNode *inout, uint32_t index) {
inout->depth++;
inout->child_num = index;
memzero(inout->public_key, sizeof(inout->public_key));
inout->is_public_key_set = false;
// making sure to wipe our memory
memzero(z, sizeof(z));
@ -164,7 +165,7 @@ int hdnode_from_secret_cardano(const uint8_t secret[CARDANO_SECRET_LENGTH],
cardano_ed25519_tweak_bits(out->private_key);
out->public_key[0] = 0;
out->is_public_key_set = false;
if (hdnode_fill_public_key(out) != 0) {
return 0;
}