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device: fix endianess dependence on subaddress secret key generation

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We now force little endianness
This commit is contained in:
moneromooo-monero 2018-03-28 11:09:29 +01:00
parent 8361d60aef
commit 0beb94f323
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GPG Key ID: 686F07454D6CEFC3
1 changed files with 6 additions and 2 deletions
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8
src/device/device_default.cpp
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@ -31,6 +31,7 @@
#include "device_default.hpp" #include "device_default.hpp"
#include "common/int-util.h"
#include "cryptonote_basic/account.h" #include "cryptonote_basic/account.h"
#include "cryptonote_basic/subaddress_index.h" #include "cryptonote_basic/subaddress_index.h"
#include "ringct/rctOps.h" #include "ringct/rctOps.h"
@ -181,10 +182,13 @@ namespace hw {
crypto::secret_key device_default::get_subaddress_secret_key(const crypto::secret_key &a, const cryptonote::subaddress_index &index) { crypto::secret_key device_default::get_subaddress_secret_key(const crypto::secret_key &a, const cryptonote::subaddress_index &index) {
const char prefix[] = "SubAddr"; const char prefix[] = "SubAddr";
char data[sizeof(prefix) + sizeof(crypto::secret_key) + sizeof(cryptonote::subaddress_index)]; char data[sizeof(prefix) + sizeof(crypto::secret_key) + 2 * sizeof(uint32_t)];
memcpy(data, prefix, sizeof(prefix)); memcpy(data, prefix, sizeof(prefix));
memcpy(data + sizeof(prefix), &a, sizeof(crypto::secret_key)); memcpy(data + sizeof(prefix), &a, sizeof(crypto::secret_key));
memcpy(data + sizeof(prefix) + sizeof(crypto::secret_key), &index, sizeof(cryptonote::subaddress_index)); uint32_t idx = SWAP32LE(index.major);
memcpy(data + sizeof(prefix) + sizeof(crypto::secret_key), &idx, sizeof(uint32_t));
idx = SWAP32LE(index.minor);
memcpy(data + sizeof(prefix) + sizeof(crypto::secret_key) + sizeof(uint32_t), &idx, sizeof(uint32_t));
crypto::secret_key m; crypto::secret_key m;
crypto::hash_to_scalar(data, sizeof(data), m); crypto::hash_to_scalar(data, sizeof(data), m);
return m; return m;