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Allow text keycode in adxkey/hcakey
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@ -1944,22 +1944,22 @@ Reminder of some extra formats and helper files vgmstream supports. They are des
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in detail in USAGE.md.
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- artificial headers:
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- .txth (text header, adds support to lots of extra formats)
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- .genh (generic header, deprecated)
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- .txth (text header, adds support to lots of extra formats)
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- .txtp (text play config, per song segment/layer manipulation)
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- .txtm (text map config, for formats that open companion files manually)
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- .genh (generic header, deprecated)
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- loop assists:
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- .txtm (text map config, for formats that open companion files manually)
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- .txtp (text play config, per song segment/layer manipulation)
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- loop assists:
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- .mus (playlist for .acm)
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- .pos (loop info for .wav)
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- .sli (loop info for .ogg)
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- .sfl (loop info for .ogg)
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- .mus (playlist for .acm)
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- .pos (loop info for .wav)
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- .sli (loop info for .ogg)
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- .sfl (loop info for .ogg)
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- other:
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- .adxkey (decryption key for .adx)
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- .ahxkey (decryption key for .ahx)
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- .hcakey (decryption key for .hca)
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- .fsbkey (decryption key for .fsb)
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- .bnsfkey (decryption key for .bnsf)
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- .adxkey (decryption key for .adx)
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- .ahxkey (decryption key for .ahx)
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- .hcakey (decryption key for .hca)
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- .fsbkey (decryption key for .fsb)
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- .bnsfkey (decryption key for .bnsf)
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- .awckey (decryption key for .awc)
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## Supported codecs
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@ -404,11 +404,11 @@ Regular formats without companion files should work fine in upper/lowercase. For
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Certain formats have encrypted data, and need a key to decrypt. vgmstream
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will try to find the correct key from a list, but it can be provided by
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a companion file:
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- `.adx`: `.adxkey` (keystring, 8-byte keycode, or derived 6 byte start/mult/add key)
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- `.adx`: `.adxkey` (keystring, or 8-byte keycode, or derived 6 byte start/mult/add key)
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- `.ahx`: `.ahxkey` (keystring, or derived 6-byte start/mult/add key)
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- `.hca`: `.hcakey` (8-byte decryption key, a 64-bit number)
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- `.awb`/`.acb` also may use `.hcakey`, and will combine with an internal AWB subkey
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- May set a 8-byte key followed a 2-byte AWB subkey for newer HCA
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- `.hca`: `.hcakey` (keystring, or 8-byte keycode, a 64-bit number)
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- May set 8-byte key followed a 2-byte AWB subkey for newer HCA
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- `.awb`/`.acb` also may use `.adxkey`/`.hcakey`, and will combine with an internal AWB subkey
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- `.fsb`: `.fsbkey` (decryption key in hex, usually between 8-32 bytes)
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- `.bnsf`: `.bnsfkey` (decryption key, a string up to 24 chars)
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- `.awc`: `.awckey` (decryption key, 0x10 bytes divided into 4 BE ints)
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@ -17,7 +17,7 @@
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#define ADX_KEY_MAX_TEST_FRAMES 32768
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#define ADX_KEY_TEST_BUFFER_SIZE 0x8000
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static int find_adx_key(STREAMFILE* sf, uint8_t type, uint16_t* xor_start, uint16_t* xor_mult, uint16_t* xor_add, uint16_t subkey);
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static bool find_adx_key(STREAMFILE* sf, uint8_t type, uint16_t* xor_start, uint16_t* xor_mult, uint16_t* xor_add, uint16_t subkey);
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VGMSTREAM* init_vgmstream_adx(STREAMFILE* sf) {
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return init_vgmstream_adx_subkey(sf, 0);
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@ -87,7 +87,6 @@ VGMSTREAM* init_vgmstream_adx_subkey(STREAMFILE* sf, uint16_t subkey) {
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/* encryption */
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if (version == 0x0408) {
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if (!find_adx_key(sf, 8, &xor_start, &xor_mult, &xor_add, 0)) {
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vgm_logi("ADX: decryption keystring not found\n");
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}
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@ -265,7 +264,7 @@ fail:
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/* ADX key detection works by reading XORed ADPCM scales in frames, and un-XORing with keys in
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* a list. If resulting values are within the expected range for N scales we accept that key. */
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static int find_adx_key(STREAMFILE* sf, uint8_t type, uint16_t *xor_start, uint16_t *xor_mult, uint16_t *xor_add, uint16_t subkey) {
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static bool find_adx_key(STREAMFILE* sf, uint8_t type, uint16_t *xor_start, uint16_t *xor_mult, uint16_t *xor_add, uint16_t subkey) {
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const int frame_size = 0x12;
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uint16_t *scales = NULL;
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uint16_t *prescales = NULL;
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@ -280,7 +279,7 @@ static int find_adx_key(STREAMFILE* sf, uint8_t type, uint16_t *xor_start, uint1
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size_t key_size;
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/* handle type8 keystrings, key9 keycodes and derived keys too */
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key_size = read_key_file(keybuf, sizeof(keybuf), sf);
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key_size = read_key_file(keybuf, sizeof(keybuf) - 1, sf);
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if (key_size > 0) {
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int is_keystring = 0;
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@ -288,28 +287,37 @@ static int find_adx_key(STREAMFILE* sf, uint8_t type, uint16_t *xor_start, uint1
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if (type == 8) {
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is_keystring = cri_key8_valid_keystring(keybuf, key_size);
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}
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else if (type == 9) {
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is_keystring = cri_key9_valid_keystring(keybuf, key_size);
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}
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if (key_size == 0x06 && !is_keystring) {
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*xor_start = get_u16be(keybuf + 0x00);
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*xor_mult = get_u16be(keybuf + 0x02);
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*xor_add = get_u16be(keybuf + 0x04);
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return 1;
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return true;
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}
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else if (type == 8 && is_keystring) {
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const char* keystring = (const char*)keybuf;
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cri_key8_derive(keystring, xor_start, xor_mult, xor_add);
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return 1;
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return true;
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}
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else if (type == 9 && is_keystring) {
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const char* keystring = (const char*)keybuf;
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uint64_t keycode = strtoull(keystring, NULL, 10);
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cri_key9_derive(keycode, subkey, xor_start, xor_mult, xor_add);
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return true;
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}
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else if (type == 9 && key_size == 0x08) {
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uint64_t keycode = get_u64be(keybuf);
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cri_key9_derive(keycode, subkey, xor_start, xor_mult, xor_add);
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return 1;
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return true;
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}
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else if (type == 9 && key_size == 0x08+0x02) {
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uint64_t file_keycode = get_u64be(keybuf+0x00);
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uint16_t file_subkey = get_u16be(keybuf+0x08);
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cri_key9_derive(file_keycode, file_subkey, xor_start, xor_mult, xor_add);
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return 1;
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return true;
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}
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}
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/* no key set or unknown format, try list */
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@ -525,5 +533,5 @@ static int find_adx_key(STREAMFILE* sf, uint8_t type, uint16_t *xor_start, uint1
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done:
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free(scales);
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free(prescales);
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return rc;
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return rc != 0;
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}
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@ -4,6 +4,7 @@
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#include "../coding/hca_decoder_clhca.h"
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#include "../util/channel_mappings.h"
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#include "../util/companion_files.h"
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#include "../util/cri_keys.h"
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#ifdef VGM_DEBUG_OUTPUT
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//#define HCA_BRUTEFORCE
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@ -45,14 +46,21 @@ VGMSTREAM* init_vgmstream_hca_subkey(STREAMFILE* sf, uint16_t subkey) {
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/* find decryption key in external file or preloaded list */
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if (hca_info->encryptionEnabled) {
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uint64_t keycode = 0;
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uint8_t keybuf[0x08+0x02];
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size_t keysize;
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uint8_t keybuf[20+1] = {0}; /* max keystring 20, +1 extra null */
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size_t key_size;
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keysize = read_key_file(keybuf, sizeof(keybuf), sf);
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if (keysize == 0x08) { /* standard */
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key_size = read_key_file(keybuf, sizeof(keybuf) - 1, sf);
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bool is_keystring = cri_key9_valid_keystring(keybuf, key_size);
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if (is_keystring) { /* number */
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const char* keystring = (const char*)keybuf;
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keycode = strtoull(keystring, NULL, 10);
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}
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else if (key_size == 0x08) { /* hex */
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keycode = get_u64be(keybuf+0x00);
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}
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else if (keysize == 0x08+0x02) { /* seed key + AWB subkey */
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else if (key_size == 0x08+0x02) { /* seed key + AWB subkey */
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keycode = get_u64be(keybuf+0x00);
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subkey = get_u16be(keybuf+0x08);
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}
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@ -126,14 +126,28 @@ end:
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*p_key3 = key3;
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}
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int cri_key8_valid_keystring(uint8_t* buf, int buf_size) {
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int i;
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bool cri_key8_valid_keystring(uint8_t* buf, int buf_size) {
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if (buf_size <= 0)
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return false;
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for (i = 0; i < buf_size; i++) {
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for (int i = 0; i < buf_size; i++) {
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if (buf[i] < 0x20 || buf[i] > 0x8f) { /* allow 0x8x for (uncommon) cases of SHIFT-JIS */
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return 0;
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return false;
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}
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}
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return 1;
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return true;
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}
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bool cri_key9_valid_keystring(uint8_t* buf, int buf_size) {
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if (buf_size <= 0 || buf_size > 20) /* max u64 */
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return false;
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for (int i = 0; i < buf_size; i++) {
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if (buf[i] < 0x30 || buf[i] > 0x39) { /* numbers only */
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return false;
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}
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}
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return true;
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}
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@ -2,12 +2,14 @@
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#define _CRI_KEYS_H_
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#include <stdint.h>
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#include <stdbool.h>
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/* common CRI key helpers */
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void cri_key8_derive(const char* key8, uint16_t* p_key1, uint16_t* p_key2, uint16_t* p_key3);
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void cri_key9_derive(uint64_t key9, uint16_t subkey, uint16_t* p_key1, uint16_t* p_key2, uint16_t* p_key3);
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int cri_key8_valid_keystring(uint8_t* buf, int buf_size);
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bool cri_key8_valid_keystring(uint8_t* buf, int buf_size);
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bool cri_key9_valid_keystring(uint8_t* buf, int buf_size);
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#endif /* _CRI_KEYS_H_ */
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