mirror of
https://github.com/DarkMatterCore/nxdumptool.git
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BKTR rewrite part 5: finish bktrReadSubStorage().
This commit is contained in:
Pablo Curiel
parent
19591d92c0
commit
7a8daf8ba5
3 changed files with 179 additions and 145 deletions
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@ -187,7 +187,7 @@ bool bktrInitializeContext(BucketTreeContext *out, NcaFsSectionContext *nca_fs_c
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/// Sets a BucketTreeSubStorageType_Regular substorage at index 0.
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bool bktrSetRegularSubStorage(BucketTreeContext *ctx, NcaFsSectionContext *nca_fs_ctx);
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/// Sets a substorage with type >= BucketTreeSubStorageType_Indirect and <= BucketTreeSubStorageType_Compressed at the provided index.
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/// Sets a substorage with type >= BucketTreeStorageType_Indirect and <= BucketTreeStorageType_Compressed at the provided index using a previously initialized BucketTreeContext.
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bool bktrSetBucketTreeSubStorage(BucketTreeContext *parent_ctx, BucketTreeContext *child_ctx, u8 substorage_index);
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/// Reads data from a Bucket Tree storage using a previously initialized BucketTreeContext.
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@ -380,6 +380,7 @@ typedef struct {
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///< SparseInfo-related fields.
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bool has_sparse_layer; ///< Set to true if this NCA FS section has a sparse layer.
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u64 sparse_table_offset; ///< header.sparse_info.physical_offset + header.sparse_info.bucket.offset. Relative to the start of the NCA content file. Placed here for convenience.
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u64 cur_sparse_virtual_offset; ///< Current sparse layer virtual offset. Used for content decryption if a sparse layer is available.
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///< CompressionInfo-related fields.
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bool has_compression_layer; ///< Set to true if this NCA FS section has a compression layer.
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@ -52,6 +52,15 @@ typedef struct {
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void *entry;
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} BucketTreeVisitor;
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typedef struct {
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void *buffer;
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u64 offset;
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u64 size;
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u64 virtual_offset;
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u32 ctr_val;
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u8 parent_storage_type; ///< BucketTreeStorageType.
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} BucketTreeSubStorageReadParams;
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/* Global variables. */
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static const char *g_bktrStorageTypeNames[] = {
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@ -74,6 +83,9 @@ static bool bktrReadAesCtrExStorage(BucketTreeVisitor *visitor, void *out, u64 r
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static bool bktrInitializeCompressedStorageContext(BucketTreeContext *out, NcaFsSectionContext *nca_fs_ctx);
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static bool bktrReadCompressedStorage(BucketTreeVisitor *visitor, void *out, u64 read_size, u64 offset);
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static bool bktrReadSubStorage(BucketTreeSubStorage *substorage, BucketTreeSubStorageReadParams *params);
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NX_INLINE void bktrBucketInitializeSubStorageReadParams(BucketTreeSubStorageReadParams *out, void *buffer, u64 offset, u64 size, u64 virtual_offset, u32 ctr_val, u8 parent_storage_type);
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static bool bktrVerifyBucketInfo(NcaBucketInfo *bucket, u64 node_size, u64 entry_size, u64 *out_node_storage_size, u64 *out_entry_storage_size);
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static bool bktrValidateTableOffsetNode(const BucketTreeTable *table, u64 node_size, u64 entry_size, u32 entry_count, u64 *out_start_offset, u64 *out_end_offset);
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NX_INLINE bool bktrVerifyNodeHeader(const BucketTreeNodeHeader *node_header, u32 node_index, u64 node_size, u64 entry_size);
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@ -164,7 +176,8 @@ bool bktrSetRegularSubStorage(BucketTreeContext *ctx, NcaFsSectionContext *nca_f
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NcaContext *nca_ctx = NULL;
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if (!bktrIsValidContext(ctx) || !nca_fs_ctx || !nca_fs_ctx->enabled || nca_fs_ctx->section_type >= NcaFsSectionType_Invalid || \
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!(nca_ctx = (NcaContext*)nca_fs_ctx->nca_ctx) || (nca_ctx->rights_id_available && !nca_ctx->titlekey_retrieved))
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!(nca_ctx = (NcaContext*)nca_fs_ctx->nca_ctx) || (nca_ctx->rights_id_available && !nca_ctx->titlekey_retrieved) || \
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(ctx->storage_type >= BucketTreeStorageType_AesCtrEx && ctx->storage_type <= BucketTreeStorageType_Sparse && ctx->nca_fs_ctx != nca_fs_ctx))
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{
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LOG_MSG("Invalid parameters!");
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return false;
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@ -187,10 +200,11 @@ bool bktrSetBucketTreeSubStorage(BucketTreeContext *parent_ctx, BucketTreeContex
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if (!bktrIsValidContext(parent_ctx) || !bktrIsValidContext(child_ctx) || substorage_index >= BKTR_MAX_SUBSTORAGE_COUNT || \
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(parent_ctx->storage_type != BucketTreeStorageType_Indirect && substorage_index != 0) || \
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(parent_ctx->storage_type == BucketTreeStorageType_Indirect && child_ctx->storage_type != BucketTreeStorageType_Compressed && child_ctx->storage_type != BucketTreeStorageType_AesCtrEx) || \
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(parent_ctx->storage_type == BucketTreeStorageType_Indirect && child_ctx->storage_type == BucketTreeStorageType_Compressed && substorage_index != 0) || \
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(parent_ctx->storage_type == BucketTreeStorageType_Indirect && child_ctx->storage_type == BucketTreeStorageType_AesCtrEx && substorage_index != 1) || \
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(parent_ctx->storage_type == BucketTreeStorageType_Indirect && child_ctx->storage_type == BucketTreeStorageType_Compressed && (substorage_index != 0 || parent_ctx->nca_fs_ctx == child_ctx->nca_fs_ctx)) || \
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(parent_ctx->storage_type == BucketTreeStorageType_Indirect && child_ctx->storage_type == BucketTreeStorageType_AesCtrEx && (substorage_index != 1 || parent_ctx->nca_fs_ctx != child_ctx->nca_fs_ctx)) || \
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parent_ctx->storage_type == BucketTreeStorageType_AesCtrEx || parent_ctx->storage_type == BucketTreeStorageType_Sparse || \
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(parent_ctx->storage_type == BucketTreeStorageType_Compressed && child_ctx->storage_type != BucketTreeStorageType_Indirect && child_ctx->storage_type != BucketTreeStorageType_Sparse))
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(parent_ctx->storage_type == BucketTreeStorageType_Compressed && child_ctx->storage_type != BucketTreeStorageType_Indirect && child_ctx->storage_type != BucketTreeStorageType_Sparse) || \
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(parent_ctx->storage_type == BucketTreeStorageType_Compressed && parent_ctx->nca_fs_ctx != child_ctx->nca_fs_ctx))
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{
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LOG_MSG("Invalid parameters!");
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return false;
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@ -255,36 +269,6 @@ end:
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static bool bktrReadSubStorage(BucketTreeSubStorage *substorage, void *out, u64 read_size, u64 offset)
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{
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if (!bktrIsValidSubstorage(substorage) || !out || !read_size)
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{
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LOG_MSG("Invalid parameters!");
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return false;
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}
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bool success = false;
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if (substorage->type == BucketTreeSubStorageType_Regular)
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{
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/* Perform a read on the target NCA. */
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// TODO: HANDLE SPARSE STORAGE VIRTUAL OFFSET DECRYPTION
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// substorage->nca_fs_ctx->has_sparse_layer
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success = ncaReadFsSection(substorage->nca_fs_ctx, out, read_size, offset);
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} else {
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/* Perform a read on the target BucketTree storage. */
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success = bktrReadStorage(substorage->bktr_ctx, out, read_size, offset);
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}
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if (!success) LOG_MSG("Failed to read 0x%lX-byte long chunk from offset 0x%lX!", read_size, offset);
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return success;
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}
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@ -293,115 +277,6 @@ static bool bktrReadSubStorage(BucketTreeSubStorage *substorage, void *out, u64
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static bool bktrReadIndirectStorage(BucketTreeVisitor *visitor, void *out, u64 read_size, u64 offset)
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{
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BucketTreeContext *ctx = visitor->bktr_ctx;
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NcaFsSectionContext *nca_fs_ctx = ctx->nca_fs_ctx;
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bool is_sparse = (ctx->storage_type == BucketTreeStorageType_Sparse);
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if (!out || !bktrIsValidSubstorage(&(ctx->substorages[0])) || (!is_sparse && !bktrIsValidSubstorage(&(ctx->substorages[1]))) || \
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(!is_sparse && ctx->substorages[0].type != BucketTreeSubStorageType_Regular && ctx->substorages[0].type != BucketTreeStorageType_Compressed) || \
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(is_sparse && ctx->substorages[0].type != BucketTreeSubStorageType_Regular) || (!is_sparse && ctx->substorages[1].type != BucketTreeSubStorageType_AesCtrEx))
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{
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LOG_MSG("Invalid parameters!");
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return false;
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}
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/* Validate Indirect Storage entry. */
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BucketTreeIndirectStorageEntry cur_entry = {0};
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memcpy(&cur_entry, visitor->entry, sizeof(BucketTreeIndirectStorageEntry));
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if (!bktrIsOffsetWithinStorageRange(ctx, cur_entry.virtual_offset) || cur_entry.virtual_offset > offset || cur_entry.storage_index > BucketTreeIndirectStorageIndex_Patch)
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{
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LOG_MSG("Invalid Indirect Storage entry! (0x%lX) (#1).", cur_entry.virtual_offset);
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return false;
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}
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u64 cur_entry_offset = cur_entry.virtual_offset, next_entry_offset = 0;
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bool moved = false, success = false;
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/* Check if we can retrieve the next entry. */
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if (bktrVisitorCanMoveNext(visitor))
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{
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/* Retrieve the next entry. */
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if (!bktrVisitorMoveNext(visitor))
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{
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LOG_MSG("Failed to retrieve next Indirect Storage entry!");
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goto end;
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}
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/* Validate Indirect Storage entry. */
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BucketTreeIndirectStorageEntry *next_entry = (BucketTreeIndirectStorageEntry*)visitor->entry;
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if (!bktrIsOffsetWithinStorageRange(ctx, next_entry->virtual_offset) || next_entry->storage_index > BucketTreeIndirectStorageIndex_Patch)
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{
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LOG_MSG("Invalid Indirect Storage entry! (0x%lX) (#2).", next_entry->virtual_offset);
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goto end;
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}
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/* Store next entry's virtual offset. */
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next_entry_offset = next_entry->virtual_offset;
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/* Update variable. */
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moved = true;
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} else {
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/* Set the next entry offset to the storage's end. */
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next_entry_offset = ctx->end_offset;
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}
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/* Verify next entry offset. */
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if (next_entry_offset <= cur_entry_offset || offset >= next_entry_offset)
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{
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LOG_MSG("Invalid virtual offset for the Indirect Storage's next entry! (0x%lX).", next_entry_offset);
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goto end;
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}
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/* Verify read area size. */
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if ((offset + read_size) > ctx->end_offset)
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{
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LOG_MSG("Error: read area exceeds Indirect Storage size!");
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goto end;
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}
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/* Perform read operation. */
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const u64 data_offset = (offset - cur_entry_offset + cur_entry.physical_offset);
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if ((offset + read_size) <= next_entry_offset)
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{
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/* Read only within the current indirect storage entry. */
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if (cur_entry.storage_index == BucketTreeIndirectStorageIndex_Original)
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{
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/* Retrieve data from the original data storage. */
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/* This may either be a Regular/Compressed storage from the base NCA (Indirect) or a Regular storage from this very same NCA (Sparse). */
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success = bktrReadSubStorage(&(ctx->substorages[0]), out, read_size, data_offset);
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if (!success) LOG_MSG("Failed to read 0x%lX-byte long chunk from offset 0x%lX in original data storage!", read_size, data_offset);
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} else {
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if (!is_sparse)
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{
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/* Retrieve data from the indirect data storage. */
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/* This must always be the AesCtrEx storage within this very same NCA (Indirect). */
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success = bktrReadSubStorage(&(ctx->substorages[1]), out, read_size, data_offset);
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if (!success) LOG_MSG("Failed to read 0x%lX-byte long chunk from offset 0x%lX in AesCtrEx storage!", read_size, data_offset);
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} else {
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/* Fill output buffer with zeroes (SparseStorage's ZeroStorage). */
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memset(0, out, read_size);
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success = true;
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}
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}
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} else {
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/* Handle reads that span multiple indirect storage entries. */
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if (moved) bktrVisitorMovePrevious(visitor);
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const u64 indirect_block_size = (next_entry_offset - offset);
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success = (bktrReadIndirectStorage(visitor, out, indirect_block_size, offset) && \
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bktrReadIndirectStorage(visitor, (u8*)out + indirect_block_size, read_size - indirect_block_size, offset + indirect_block_size));
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if (!success) LOG_MSG("Failed to read 0x%lX bytes block from multiple Indirect Storage entries at offset 0x%lX!", read_size, offset);
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}
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end:
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return success;
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}
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@ -554,6 +429,119 @@ end:
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return success;
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}
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static bool bktrReadIndirectStorage(BucketTreeVisitor *visitor, void *out, u64 read_size, u64 offset)
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{
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BucketTreeContext *ctx = visitor->bktr_ctx;
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NcaFsSectionContext *nca_fs_ctx = ctx->nca_fs_ctx;
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bool is_sparse = (ctx->storage_type == BucketTreeStorageType_Sparse);
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if (!out || !bktrIsValidSubstorage(&(ctx->substorages[0])) || (!is_sparse && !bktrIsValidSubstorage(&(ctx->substorages[1]))) || \
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(!is_sparse && ctx->substorages[0].type != BucketTreeSubStorageType_Regular && ctx->substorages[0].type != BucketTreeStorageType_Compressed) || \
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(is_sparse && ctx->substorages[0].type != BucketTreeSubStorageType_Regular) || (!is_sparse && ctx->substorages[1].type != BucketTreeSubStorageType_AesCtrEx))
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{
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LOG_MSG("Invalid parameters!");
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return false;
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}
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/* Validate Indirect Storage entry. */
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BucketTreeIndirectStorageEntry cur_entry = {0};
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memcpy(&cur_entry, visitor->entry, sizeof(BucketTreeIndirectStorageEntry));
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if (!bktrIsOffsetWithinStorageRange(ctx, cur_entry.virtual_offset) || cur_entry.virtual_offset > offset || cur_entry.storage_index > BucketTreeIndirectStorageIndex_Patch)
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{
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LOG_MSG("Invalid Indirect Storage entry! (0x%lX) (#1).", cur_entry.virtual_offset);
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return false;
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}
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u64 cur_entry_offset = cur_entry.virtual_offset, next_entry_offset = 0;
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bool moved = false, success = false;
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/* Check if we can retrieve the next entry. */
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if (bktrVisitorCanMoveNext(visitor))
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{
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/* Retrieve the next entry. */
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if (!bktrVisitorMoveNext(visitor))
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{
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LOG_MSG("Failed to retrieve next Indirect Storage entry!");
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goto end;
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}
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/* Validate Indirect Storage entry. */
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BucketTreeIndirectStorageEntry *next_entry = (BucketTreeIndirectStorageEntry*)visitor->entry;
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if (!bktrIsOffsetWithinStorageRange(ctx, next_entry->virtual_offset) || next_entry->storage_index > BucketTreeIndirectStorageIndex_Patch)
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{
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LOG_MSG("Invalid Indirect Storage entry! (0x%lX) (#2).", next_entry->virtual_offset);
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goto end;
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}
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/* Store next entry's virtual offset. */
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next_entry_offset = next_entry->virtual_offset;
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/* Update variable. */
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moved = true;
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} else {
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/* Set the next entry offset to the storage's end. */
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next_entry_offset = ctx->end_offset;
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}
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/* Verify next entry offset. */
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if (next_entry_offset <= cur_entry_offset || offset >= next_entry_offset)
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{
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LOG_MSG("Invalid virtual offset for the Indirect Storage's next entry! (0x%lX).", next_entry_offset);
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goto end;
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}
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/* Verify read area size. */
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if ((offset + read_size) > ctx->end_offset)
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{
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LOG_MSG("Error: read area exceeds Indirect Storage size!");
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goto end;
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}
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/* Perform read operation. */
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BucketTreeSubStorageReadParams params = {0};
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const u64 data_offset = (offset - cur_entry_offset + cur_entry.physical_offset);
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bktrBucketInitializeSubStorageReadParams(¶ms, out, data_offset, read_size, offset, 0, ctx->storage_type);
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if ((offset + read_size) <= next_entry_offset)
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{
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/* Read only within the current indirect storage entry. */
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if (cur_entry.storage_index == BucketTreeIndirectStorageIndex_Original)
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{
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/* Retrieve data from the original data storage. */
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/* This may either be a Regular/Compressed storage from the base NCA (Indirect) or a Regular storage from this very same NCA (Sparse). */
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success = bktrReadSubStorage(&(ctx->substorages[0]), ¶ms);
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if (!success) LOG_MSG("Failed to read 0x%lX-byte long chunk from offset 0x%lX in original data storage!", read_size, data_offset);
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} else {
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if (!is_sparse)
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{
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/* Retrieve data from the indirect data storage. */
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/* This must always be the AesCtrEx storage within this very same NCA (Indirect). */
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success = bktrReadSubStorage(&(ctx->substorages[1]), ¶ms);
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if (!success) LOG_MSG("Failed to read 0x%lX-byte long chunk from offset 0x%lX in AesCtrEx storage!", read_size, data_offset);
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} else {
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/* Fill output buffer with zeroes (SparseStorage's ZeroStorage). */
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memset(0, out, read_size);
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success = true;
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}
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}
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} else {
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/* Handle reads that span multiple indirect storage entries. */
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if (moved) bktrVisitorMovePrevious(visitor);
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const u64 indirect_block_size = (next_entry_offset - offset);
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success = (bktrReadIndirectStorage(visitor, out, indirect_block_size, offset) && \
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bktrReadIndirectStorage(visitor, (u8*)out + indirect_block_size, read_size - indirect_block_size, offset + indirect_block_size));
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if (!success) LOG_MSG("Failed to read 0x%lX bytes block from multiple Indirect Storage entries at offset 0x%lX!", read_size, offset);
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}
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end:
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return success;
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}
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static bool bktrInitializeAesCtrExStorageContext(BucketTreeContext *out, NcaFsSectionContext *nca_fs_ctx)
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{
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if (nca_fs_ctx->section_type != NcaFsSectionType_PatchRomFs || !nca_fs_ctx->header.patch_info.aes_ctr_ex_bucket.size)
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@ -686,6 +674,51 @@ end:
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return success;
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}
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static bool bktrReadSubStorage(BucketTreeSubStorage *substorage, BucketTreeSubStorageReadParams *params)
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{
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if (!bktrIsValidSubstorage(substorage) || !params || !params->buffer || !params->size)
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{
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LOG_MSG("Invalid parameters!");
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return false;
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}
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BucketTreeContext *ctx = substorage->bktr_ctx;
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NcaFsSectionContext *nca_fs_ctx = substorage->nca_fs_ctx;
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bool success = false;
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if (substorage->type == BucketTreeSubStorageType_Regular)
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{
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if (params->parent_storage_type == BucketTreeStorageType_AesCtrEx)
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{
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/* Perform a read on the target NCA using AesCtrEx crypto. */
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success = ncaReadAesCtrExStorageFromBktrSection(nca_fs_ctx, params->buffer, params->size, params->offset, params->ctr_val);
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} else {
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/* Make sure to handle Sparse virtual offsets if we need to. */
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||||
if (params->parent_storage_type == BucketTreeStorageType_Sparse && virtual_offset) nca_fs_ctx->cur_sparse_virtual_offset = params->virtual_offset;
|
||||
|
||||
/* Perform a read on the target NCA. */
|
||||
success = ncaReadFsSection(nca_fs_ctx, params->buffer, params->size, params->offset);
|
||||
}
|
||||
} else {
|
||||
/* Perform a read on the target BucketTree storage. */
|
||||
success = bktrReadStorage(ctx, params->buffer, params->size, params->offset);
|
||||
}
|
||||
|
||||
if (!success) LOG_MSG("Failed to read 0x%lX-byte long chunk from offset 0x%lX!", params->size, params->offset);
|
||||
|
||||
return success;
|
||||
}
|
||||
|
||||
NX_INLINE void bktrBucketInitializeSubStorageReadParams(BucketTreeSubStorageReadParams *out, void *buffer, u64 offset, u64 size, u64 virtual_offset, u32 ctr_val, u8 parent_storage_type)
|
||||
{
|
||||
out->buffer = buffer;
|
||||
out->offset = offset;
|
||||
out->size = size;
|
||||
out->virtual_offset = ((virtual_offset && parent_storage_type == BucketTreeStorageType_Sparse) ? virtual_offset : 0);
|
||||
out->ctr_val = ((ctr_val && parent_storage_type == BucketTreeStorageType_AesCtrEx) ? ctr_val : 0);
|
||||
out->parent_storage_type = parent_storage_type;
|
||||
}
|
||||
|
||||
static bool bktrVerifyBucketInfo(NcaBucketInfo *bucket, u64 node_size, u64 entry_size, u64 *out_node_storage_size, u64 *out_entry_storage_size)
|
||||
{
|
||||
/* Verify bucket info properties. */
|
||||
|
|
|
|||
Loading…
Reference in a new issue