mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-10 14:11:43 +00:00
120 lines
No EOL
4 KiB
C++
120 lines
No EOL
4 KiB
C++
#include <switch.h>
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#include <algorithm>
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#include <cstdio>
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#include "ldr_npdm.hpp"
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#include "ldr_registration.hpp"
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static NpdmUtils::NpdmCache g_npdm_cache = {0};
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Result NpdmUtils::LoadNpdmFromCache(u64 tid, NpdmInfo *out) {
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if (g_npdm_cache.info.title_id != tid) {
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return LoadNpdm(tid, out);
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}
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*out = g_npdm_cache.info;
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return 0;
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}
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Result NpdmUtils::LoadNpdm(u64 tid, NpdmInfo *out) {
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Result rc;
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g_npdm_cache.info = (const NpdmUtils::NpdmInfo){0};
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FILE *f_npdm = fopen("code:/main.npdm", "rb");
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if (f_npdm == NULL) {
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/* For generic "Couldn't open the file" error, just say the file doesn't exist. */
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return 0x202;
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}
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fseek(f_npdm, 0, SEEK_END);
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size_t npdm_size = ftell(f_npdm);
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fseek(f_npdm, 0, SEEK_SET);
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if (npdm_size > sizeof(g_npdm_cache.buffer) || fread(g_npdm_cache.buffer, 1, npdm_size, f_npdm) != npdm_size) {
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return 0x609;
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}
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fclose(f_npdm);
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rc = 0x809;
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if (npdm_size < sizeof(NpdmUtils::NpdmHeader)) {
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return rc;
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}
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/* For ease of access... */
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g_npdm_cache.info.header = (NpdmUtils::NpdmHeader *)(g_npdm_cache.buffer);
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NpdmInfo *info = &g_npdm_cache.info;
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if (info->header->magic != MAGIC_META) {
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return rc;
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}
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if (info->header->mmu_flags > 0xF) {
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return rc;
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}
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if (info->header->aci0_offset < sizeof(NpdmUtils::NpdmHeader) || info->header->aci0_size < sizeof(NpdmUtils::NpdmAci0) || info->header->aci0_offset + info->header->aci0_size > npdm_size) {
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return rc;
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}
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info->aci0 = (NpdmAci0 *)(g_npdm_cache.buffer + info->header->aci0_offset);
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if (info->aci0->magic != MAGIC_ACI0) {
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return rc;
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}
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if (info->aci0->fah_size > info->header->aci0_size || info->aci0->fah_offset < sizeof(NpdmUtils::NpdmAci0) || info->aci0->fah_offset + info->aci0->fah_size > info->header->aci0_size) {
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return rc;
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}
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info->aci0_fah = (void *)((uintptr_t)info->aci0 + info->aci0->fah_offset);
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if (info->aci0->sac_size > info->header->aci0_size || info->aci0->sac_offset < sizeof(NpdmUtils::NpdmAci0) || info->aci0->sac_offset + info->aci0->sac_size > info->header->aci0_size) {
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return rc;
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}
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info->aci0_sac = (void *)((uintptr_t)info->aci0 + info->aci0->sac_offset);
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if (info->aci0->kac_size > info->header->aci0_size || info->aci0->kac_offset < sizeof(NpdmUtils::NpdmAci0) || info->aci0->kac_offset + info->aci0->kac_size > info->header->aci0_size) {
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return rc;
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}
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info->aci0_kac = (void *)((uintptr_t)info->aci0 + info->aci0->kac_offset);
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if (info->header->acid_offset < sizeof(NpdmUtils::NpdmHeader) || info->header->acid_size < sizeof(NpdmUtils::NpdmAcid) || info->header->acid_offset + info->header->acid_size > npdm_size) {
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return rc;
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}
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info->acid = (NpdmAcid *)(g_npdm_cache.buffer + info->header->acid_offset);
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if (info->acid->magic != MAGIC_ACID) {
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return rc;
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}
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/* TODO: Check if retail flag is set if not development hardware. */
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if (info->acid->fac_size > info->header->acid_size || info->acid->fac_offset < sizeof(NpdmUtils::NpdmAcid) || info->acid->fac_offset + info->acid->fac_size > info->header->acid_size) {
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return rc;
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}
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info->acid_fac = (void *)((uintptr_t)info->acid + info->acid->fac_offset);
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if (info->acid->sac_size > info->header->acid_size || info->acid->sac_offset < sizeof(NpdmUtils::NpdmAcid) || info->acid->sac_offset + info->acid->sac_size > info->header->acid_size) {
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return rc;
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}
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info->acid_sac = (void *)((uintptr_t)info->acid + info->acid->sac_offset);
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if (info->acid->kac_size > info->header->acid_size || info->acid->kac_offset < sizeof(NpdmUtils::NpdmAcid) || info->acid->kac_offset + info->acid->kac_size > info->header->acid_size) {
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return rc;
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}
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info->acid_kac = (void *)((uintptr_t)info->acid + info->acid->kac_offset);
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/* We validated! */
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info->title_id = tid;
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*out = *info;
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rc = 0;
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return rc;
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} |