bool CBInitHDKeyFromData(CBHDKey * key, uint8_t * data, CBHDKeyVersion versionBytes, CBHDKeyType type){
CBInitHDKey(key);
// Set version bytes
key->versionBytes = versionBytes;
// Chain code
memcpy(key->chainCode, data + 13, 32);
if (type == CB_HD_KEY_TYPE_PRIVATE){
// Private
memcpy(key->keyPair->privkey, data + 46, 32);
// Calculate public key
CBKeyGetPublicKey(CBHDKeyGetPrivateKey(key), CBHDKeyGetPublicKey(key));
}else
// Assume public
memcpy(CBHDKeyGetPublicKey(key), data + 45, 33);
// Depth
key->depth = data[4];
if (key->depth == 0) {
// Master
key->childID.priv = false;
key->childID.childNumber = 0;
for (uint8_t x = 5; x < 9; x++)
if (data[x] != 0) {
CBLogError("The fingerprint of the master key is not zero.");
return false;
}
}else{
// Not master
uint32_t childNum = CBArrayToInt32BigEndian(data, 9);
key->childID.priv = childNum >> 31;
key->childID.childNumber = childNum & 0x8fffffff;
}
return true;
}
CBHDKey * CBNewHDKeyFromData(uint8_t * data){
CBHDKeyVersion versionBytes = CBArrayToInt32BigEndian(data, 0);
CBHDKeyType type = CBHDKeyGetType(versionBytes);
if (type == CB_HD_KEY_TYPE_UNKNOWN) {
CBLogError("Unknown key type.");
return NULL;
}
// Allocate memory for key
CBHDKey * key = CBNewHDKey(type == CB_HD_KEY_TYPE_PRIVATE);
return CBInitHDKeyFromData(key, data, versionBytes, type) ? key : NULL;
}
