mirror of
https://github.com/d0k3/GodMode9.git
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46 lines
1.7 KiB
C
46 lines
1.7 KiB
C
#include "tmd.h"
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#include "sha.h"
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u32 GetTmdCtr(u8* ctr, TmdContentChunk* chunk) {
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memset(ctr, 0, 16);
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memcpy(ctr, chunk->index, 2);
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return 0;
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}
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u32 FixTmdHashes(TitleMetaData* tmd) {
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TmdContentChunk* content_list = (TmdContentChunk*) (tmd + 1);
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u32 content_count = getbe16(tmd->content_count);
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// recalculate content info hashes
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for (u32 i = 0, kc = 0; i < 64 && kc < content_count; i++) {
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TmdContentInfo* info = tmd->contentinfo + i;
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u32 k = getbe16(info->cmd_count);
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sha_quick(info->hash, content_list + kc, k * sizeof(TmdContentChunk), SHA256_MODE);
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kc += k;
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}
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sha_quick(tmd->contentinfo_hash, (u8*)tmd->contentinfo, 64 * sizeof(TmdContentInfo), SHA256_MODE);
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return 0;
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}
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u32 BuildFakeTmd(TitleMetaData* tmd, u8* title_id, u32 n_contents, u32 save_size) {
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const u8 sig_type[4] = { TMD_SIG_TYPE };
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// safety check: number of contents
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if (n_contents > TMD_MAX_CONTENTS) return 1; // !!!
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// set TMD all zero for a clean start
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memset(tmd, 0x00, TMD_SIZE_N(n_contents));
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// file TMD values
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memcpy(tmd->sig_type, sig_type, 4);
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memset(tmd->signature, 0xFF, 0x100);
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snprintf((char*) tmd->issuer, 0x40, TMD_ISSUER);
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tmd->version = 0x01;
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memcpy(tmd->title_id, title_id, 8);
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tmd->title_type[3] = 0x40; // whatever
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for (u32 i = 0; i < 4; i++) tmd->save_size[i] = (save_size >> (i*8)) & 0xFF; // little endian?
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tmd->content_count[1] = (u8) n_contents;
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memset(tmd->contentinfo_hash, 0xFF, 0x20); // placeholder (hash)
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tmd->contentinfo[0].cmd_count[1] = (u8) n_contents;
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memset(tmd->contentinfo[0].hash, 0xFF, 0x20); // placeholder (hash)
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// nothing to do for content list (yet)
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return 0;
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}
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