92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
#include "meta.h"
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#include "fsb_keys.h"
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#include "fsb_encrypted_streamfile.h"
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static VGMSTREAM* test_fsbkey(STREAMFILE* sf, const uint8_t* key, size_t key_size, uint8_t flags);
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/* fully encrypted FSBs */
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VGMSTREAM* init_vgmstream_fsb_encrypted(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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/* ignore non-encrypted FSB */
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if ((read_u32be(0x00,sf) & 0xFFFFFF00) == get_id32be("FSB\0"))
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goto fail;
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/* checks */
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/* .fsb: standard
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* .fsb.ps3: various Guitar Hero (PS3)
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* .fsb.xen: various Guitar Hero (X360/PC) */
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if (!check_extensions(sf, "fsb,ps3,xen"))
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goto fail;
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/* try fsbkey + all combinations of FSB4/5 and decryption algorithms */
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{
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uint8_t key[FSB_KEY_MAX];
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size_t key_size = read_key_file(key, FSB_KEY_MAX, sf);
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if (key_size) {
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vgmstream = test_fsbkey(sf, key, key_size, MODE_FSBS_ALL);
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return vgmstream;
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}
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}
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/* try all keys until one works */
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if (!vgmstream) {
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for (int i = 0; i < fsbkey_list_count; i++) {
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fsbkey_info entry = fsbkey_list[i];
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vgmstream = test_fsbkey(sf, (const uint8_t*)entry.key, entry.key_size, entry.flags);
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if (vgmstream) break;
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}
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}
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if (!vgmstream)
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goto fail;
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return vgmstream;
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fail:
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close_vgmstream(vgmstream);
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return NULL;
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}
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static VGMSTREAM* test_fsbkey(STREAMFILE* sf, const uint8_t* key, size_t key_size, uint8_t flags) {
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STREAMFILE* temp_sf = NULL;
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VGMSTREAM* vc = NULL;
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if (!key_size)
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return NULL;
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int test_fsb4 = flags & FLAG_FSB4;
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int test_fsb5 = flags & FLAG_FSB5;
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int test_std = flags & FLAG_STD;
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int test_alt = flags & FLAG_ALT;
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if (!vc && test_std) {
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temp_sf = setup_fsb_streamfile(sf, key, key_size, 0);
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if (!temp_sf) return NULL;
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//;dump_streamfile(temp_sf, 0);
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if (!vc && test_fsb4) vc = init_vgmstream_fsb(temp_sf);
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if (!vc && test_fsb5) vc = init_vgmstream_fsb5(temp_sf);
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close_streamfile(temp_sf);
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}
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if (!vc && test_alt) {
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temp_sf = setup_fsb_streamfile(sf, key, key_size, 1);
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if (!temp_sf) return NULL;
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//;dump_streamfile(temp_sf, 1);
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if (!vc && test_fsb4) vc = init_vgmstream_fsb(temp_sf);
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if (!vc && test_fsb5) vc = init_vgmstream_fsb5(temp_sf);
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close_streamfile(temp_sf);
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}
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return vc;
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}
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