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Add ADX/HCA key [Detective Conan Runner (Android)]

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This commit is contained in:
bnnm 2020-02-22 20:40:21 +01:00
parent 1aa8438f67
commit a18f06a7b1
3 changed files with 81 additions and 11 deletions
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3
src/meta/adx_keys.h
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@ -231,6 +231,9 @@ static const adxkey_info adxkey9_list[] = {
/* Nogizaka46 Rhythm Festival (Android) */
{0x2378,0x5511,0x0201, NULL,5613126134333697}, // 0013F11BC5510101
/* Detective Conan Runner / Case Closed Runner (Android) */
{0x0613,0x0e3d,0x6dff, NULL,1175268187653273344}, // 104f643098e3f700
};
static const int adxkey8_list_count = sizeof(adxkey8_list) / sizeof(adxkey8_list[0]);

86
src/meta/hca.c
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@ -2,8 +2,14 @@
#include "hca_keys.h"
#include "../coding/coding.h"
//#define HCA_BRUTEFORCE
#ifdef HCA_BRUTEFORCE
static void bruteforce_hca_key(STREAMFILE* sf, hca_codec_data* hca_data, unsigned long long* out_keycode, uint16_t subkey);
#endif
static void find_hca_key(hca_codec_data * hca_data, unsigned long long * out_keycode, uint16_t subkey);
/* CRI HCA - streamed audio from CRI ADX2/Atom middleware */
VGMSTREAM * init_vgmstream_hca(STREAMFILE *streamFile) {
return init_vgmstream_hca_subkey(streamFile, 0x0000);
}
@ -41,6 +47,11 @@ VGMSTREAM * init_vgmstream_hca_subkey(STREAMFILE *streamFile, uint16_t subkey) {
uint16_t file_sub = (uint16_t)get_16bitBE(keybuf+0x08);
keycode = file_key * ( ((uint64_t)file_sub << 16u) | ((uint16_t)~file_sub + 2u) );
}
#ifdef HCA_BRUTEFORCE
else if (1) {
bruteforce_hca_key(streamFile, hca_data, &keycode, subkey);
}
#endif
else {
find_hca_key(hca_data, &keycode, subkey);
}
@ -127,41 +138,94 @@ static inline void test_key(hca_codec_data * hca_data, uint64_t key, uint16_t su
}
}
/* Try to find the decryption key from a list. */
static void find_hca_key(hca_codec_data * hca_data, unsigned long long * out_keycode, uint16_t subkey) {
/* try to find the decryption key from a list. */
static void find_hca_key(hca_codec_data* hca_data, unsigned long long* out_keycode, uint16_t subkey) {
const size_t keys_length = sizeof(hcakey_list) / sizeof(hcakey_info);
int best_score = -1;
int i,j;
*out_keycode = 0xCC55463930DBE1AB; /* defaults to PSO2 key, most common */
/* find a candidate key */
for (i = 0; i < keys_length; i++) {
uint64_t key = hcakey_list[i].key;
size_t subkeys_size = hcakey_list[i].subkeys_size;
const uint16_t *subkeys = hcakey_list[i].subkeys;
/* try once with external subkey, if any */
test_key(hca_data, key, subkey, &best_score, out_keycode);
if (best_score == 1) /* best possible score */
if (best_score == 1)
goto done;
/* try subkey list */
if (subkeys_size > 0 && subkey == 0) {
for (j = 0; j < subkeys_size; j++) {
test_key(hca_data, key, subkeys[j], &best_score, out_keycode);
if (best_score == 1) /* best possible score */
if (best_score == 1)
goto done;
}
}
}
done:
//;VGM_LOG("HCA: best key=%08x%08x (score=%i)\n",
// (uint32_t)((*out_keycode >> 32) & 0xFFFFFFFF), (uint32_t)(*out_keycode & 0xFFFFFFFF), best_score);
VGM_ASSERT(best_score > 1, "HCA: best key=%08x%08x (score=%i)\n",
(uint32_t)((*out_keycode >> 32) & 0xFFFFFFFF), (uint32_t)(*out_keycode & 0xFFFFFFFF), best_score);
VGM_ASSERT(best_score < 0, "HCA: key not found\n");
}
#ifdef HCA_BRUTEFORCE
/* Bruteforce binary keys in executables and similar files, mainly for some mobile games.
* Kinda slow but acceptable for ~20MB exes, not very optimized. Unity usually has keys
* in plaintext (inside levelX or other base files) instead though. */
static void bruteforce_hca_key(STREAMFILE* sf, hca_codec_data* hca_data, unsigned long long* out_keycode, uint16_t subkey) {
STREAMFILE* sf_keys = NULL;
uint8_t* buf = NULL;
int best_score = -1;
off_t keys_size, bytes;
int i, pos;
VGM_LOG("HCA: test keys\n");
*out_keycode = 0;
/* load whole file in memory for performance (exes with keys shouldn't be too big) */
sf_keys = open_streamfile_by_filename(sf, "keys.bin");
if (!sf_keys) goto done;
keys_size = get_streamfile_size(sf_keys);
buf = malloc(keys_size);
if (!buf) goto done;
bytes = read_streamfile(buf, 0, keys_size, sf_keys);
if (bytes != keys_size) goto done;
pos = 0;
while (pos < keys_size - 4) {
uint64_t key;
/* keys are usually u32le lower, u32le upper (u64le) but other orders may exist */
key = ((uint64_t)get_u32le(buf + pos + 0x00) << 0 ) | ((uint64_t)get_u32le(buf + pos + 0x04) << 32);
//key = ((uint64_t)get_u32le(buf + pos + 0x00) << 32) | ((uint64_t)get_u32le(buf + pos + 0x04) << 0);
//key = ((uint64_t)get_u32be(buf + pos + 0x00) << 0 ) | ((uint64_t)get_u32be(buf + pos + 0x04) << 32);
//key = ((uint64_t)get_u32be(buf + pos + 0x00) << 32) | ((uint64_t)get_u32be(buf + pos + 0x04) << 0);
if (key == 0)
continue;
test_key(hca_data, keys[i], subkey, &best_score, out_keycode);
if (best_score == 1)
goto done;
VGM_ASSERT(pos % 0x100000 == 0, "HCA: pos %x...\n", pos);
/* observed files have aligned keys in the .text section, change if needed */
pos += 0x04; //pos++;
}
done:
VGM_ASSERT(best_score > 0, "HCA: best key=%08x%08x (score=%i)\n",
(uint32_t)((*out_keycode >> 32) & 0xFFFFFFFF), (uint32_t)(*out_keycode & 0xFFFFFFFF), best_score);
VGM_ASSERT(best_score < 0, "HCA: key not found\n");
close_streamfile(sf_keys);
free(buf);
}
#endif

3
src/meta/hca_keys.h
View File

@ -330,6 +330,9 @@ static const hcakey_info hcakey_list[] = {
/* Inazuma Eleven SD (Android) */
{0xC436E03737D55B5F}, // C436E03737D55B5F / 14138734607940803423
/* Detective Conan Runner / Case Closed Runner (Android) */
{1175268187653273344}, // 104f643098e3f700
/* Dragalia Lost (iOS/Android) */
{2967411924141, subkeys_dgl, sizeof(subkeys_dgl) / sizeof(subkeys_dgl[0]) }, // 000002B2E7889CAD