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Add offset on MK hit for SM4 ##crypto

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Azox 2024-10-19 14:48:17 +02:00 committed by GitHub
parent f85d1bc1d1
commit 190248d30d
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GPG Key ID: B5690EEEBB952194
1 changed files with 3 additions and 3 deletions
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6
libr/search/sm4_find.c
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@ -12,14 +12,14 @@ static bool sm4_key_test(const unsigned char *buf) {
}
// Display the corresponding master key which is not directly in memory for SM4.
static void sm4_master_key(const unsigned char *buf) {
static void sm4_master_key(const unsigned char *buf, ut64 offset) {
ut32 *ptr = (ut32 *)buf;
ut32 master_key[4] = { 0 };
master_key[3] = ptr[3] ^ (sm4_RK (ptr[2] ^ ptr[1] ^ ptr[0] ^ sm4_CK[3]));
master_key[2] = ptr[2] ^ (sm4_RK (ptr[1] ^ ptr[0] ^ master_key[3] ^ sm4_CK[2]));
master_key[1] = ptr[1] ^ (sm4_RK (ptr[0] ^ master_key[3] ^ master_key[2] ^ sm4_CK[1]));
master_key[0] = ptr[0] ^ (sm4_RK (master_key[3] ^ master_key[2] ^ master_key[1] ^ sm4_CK[0]));
R_LOG_INFO ("Master key found: %08x%08x%08x%08x", FK[0] ^ master_key[0], FK[1] ^ master_key[1], FK[2] ^ master_key[2], FK[3] ^ master_key[3]);
R_LOG_INFO ("Master key found: %08x%08x%08x%08x @%#8"PFMT64x, FK[0] ^ master_key[0], FK[1] ^ master_key[1], FK[2] ^ master_key[2], FK[3] ^ master_key[3], offset);
return;
}
@ -32,7 +32,7 @@ R_IPI int search_sm4_update(RSearch *s, ut64 from, const ut8 *buf, int len) {
r_list_foreach (s->kws, iter, kw) {
for (i = 0; i < last + 1; i++) {
if (sm4_key_test (buf + i)) {
sm4_master_key (buf + i);
sm4_master_key (buf + i, from + i);
kw->keyword_length = SM4_KEY_LENGTH;
t = r_search_hit_new (s, kw, from + i);
if (!t) {