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Code Issues Releases Activity

BKTR: add support for games with base Program NCAs without a RomFS section.

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This commit is contained in:
Pablo Curiel 2020-09-26 06:49:18 -04:00
parent 40ca7e2d6c
commit 97d9603e93
2 changed files with 13 additions and 5 deletions
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17
source/bktr.c
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@ -37,8 +37,8 @@ bool bktrInitializeContext(BktrContext *out, NcaFsSectionContext *base_nca_fs_ct
{
NcaContext *base_nca_ctx = NULL, *update_nca_ctx = NULL;
if (!out || !base_nca_fs_ctx || !base_nca_fs_ctx->enabled || !(base_nca_ctx = (NcaContext*)base_nca_fs_ctx->nca_ctx) || base_nca_fs_ctx->section_type != NcaFsSectionType_RomFs || \
base_nca_fs_ctx->encryption_type == NcaEncryptionType_AesCtrEx || !update_nca_fs_ctx || !update_nca_fs_ctx->enabled || !(update_nca_ctx = (NcaContext*)update_nca_fs_ctx->nca_ctx) || \
if (!out || !base_nca_fs_ctx || !(base_nca_ctx = (NcaContext*)base_nca_fs_ctx->nca_ctx) || \
!update_nca_fs_ctx || !update_nca_fs_ctx->enabled || !(update_nca_ctx = (NcaContext*)update_nca_fs_ctx->nca_ctx) || \
update_nca_fs_ctx->section_type != NcaFsSectionType_PatchRomFs || update_nca_fs_ctx->encryption_type != NcaEncryptionType_AesCtrEx || \
base_nca_ctx->header.program_id != update_nca_ctx->header.program_id || base_nca_ctx->header.content_type != update_nca_ctx->header.content_type || \
__builtin_bswap32(update_nca_fs_ctx->header.patch_info.indirect_bucket.header.magic) != NCA_BKTR_MAGIC || \
@ -50,8 +50,11 @@ bool bktrInitializeContext(BktrContext *out, NcaFsSectionContext *base_nca_fs_ct
return false;
}
/* Update missing base NCA RomFS status. */
out->missing_base_romfs = (!base_nca_fs_ctx->enabled || base_nca_fs_ctx->section_type != NcaFsSectionType_RomFs || base_nca_fs_ctx->encryption_type == NcaEncryptionType_AesCtrEx);
/* Initialize base NCA RomFS context. */
if (!romfsInitializeContext(&(out->base_romfs_ctx), base_nca_fs_ctx))
if (!out->missing_base_romfs && !romfsInitializeContext(&(out->base_romfs_ctx), base_nca_fs_ctx))
{
LOGFILE("Failed to initialize base NCA RomFS context!");
return false;
@ -287,7 +290,7 @@ bool bktrIsFileEntryUpdated(BktrContext *ctx, RomFileSystemFileEntry *file_entry
static bool bktrPhysicalSectionRead(BktrContext *ctx, void *out, u64 read_size, u64 offset)
{
if (!ctx || !ctx->base_romfs_ctx.nca_fs_ctx || !ctx->indirect_block || !out || !read_size)
if (!ctx || (!ctx->missing_base_romfs && !ctx->base_romfs_ctx.nca_fs_ctx) || !ctx->indirect_block || !out || !read_size)
{
LOGFILE("Invalid parameters!");
return false;
@ -318,9 +321,13 @@ static bool bktrPhysicalSectionRead(BktrContext *ctx, void *out, u64 read_size,
{
success = bktrAesCtrExStorageRead(ctx, out, read_size, offset, section_offset);
if (!success) LOGFILE("Failed to read 0x%lX bytes block from BKTR AesCtrEx storage at offset 0x%lX!", read_size, section_offset);
} else {
} else
if (!ctx->missing_base_romfs)
{
success = ncaReadFsSection(ctx->base_romfs_ctx.nca_fs_ctx, out, read_size, section_offset);
if (!success) LOGFILE("Failed to read 0x%lX bytes block from base RomFS at offset 0x%lX!", read_size, section_offset);
} else {
LOGFILE("Attempting to read 0x%lX bytes block from non-existent base RomFS at offset 0x%lX!", read_size, section_offset);
}
} else {
/* Handle reads that span multiple indirect storage entries. */

1
source/bktr.h
View file

@ -82,6 +82,7 @@ typedef struct {
u64 body_offset; ///< Patched RomFS image file data body offset (relative to the start of the RomFS).
BktrIndirectStorageBlock *indirect_block; ///< BKTR Indirect Storage Block.
BktrAesCtrExStorageBlock *aes_ctr_ex_block; ///< BKTR AesCtrEx Storage Block.
bool missing_base_romfs; ///< If true, only Patch RomFS data is used. Needed for games with base Program NCAs without a RomFS section (e.g. Fortnite, World of Tanks Blitz, etc.).
} BktrContext;
/// Initializes a BKTR context.