Bump version to 1.0.0-alpha.11 in nuspec file

CMakeLists.txt

@@ -277,7 +277,7 @@ if(USE_SLOG)
   target_compile_definitions(aaruformat PRIVATE ENABLE_TRACE ENABLE_FATAL USE_SLOG)
 
   # Link slog
-  target_link_libraries(aaruformat PRIVATE slog)
+  target_link_libraries(aaruformat slog)
 
   message(STATUS "slog logging enabled")
 else()

libaaruformat.nuspec

@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
     <metadata>
         <id>libaaruformat</id>
-        <version>1.0.0-alpha.8</version>
+        <version>1.0.0-alpha.11</version>
         <description>Library for management of AaruFormat images.</description>
         <authors>claunia</authors>
         <projectUrl>https://github.com/aaru-dps/libaaruformat</projectUrl>

src/ddt/ddt_v2.c

@@ -605,7 +605,7 @@ int32_t decode_ddt_single_level_v2(aaruformat_context *ctx, uint64_t sector_addr
 
     // Calculate positive or negative sector
     if(negative)
-        sector_address -= ctx->user_data_ddt_header.negative;
+        sector_address = ctx->user_data_ddt_header.negative - sector_address;
     else
         sector_address += ctx->user_data_ddt_header.negative;
 
@@ -757,7 +757,7 @@ int32_t decode_ddt_multi_level_v2(aaruformat_context *ctx, uint64_t sector_addre
 
     // Calculate positive or negative sector
     if(negative)
-        sector_address -= ctx->user_data_ddt_header.negative;
+        sector_address = ctx->user_data_ddt_header.negative - sector_address;
     else
         sector_address += ctx->user_data_ddt_header.negative;
 
@@ -985,7 +985,7 @@ int32_t decode_ddt_multi_level_v2(aaruformat_context *ctx, uint64_t sector_addre
  * @return Returns one of the following status codes:
  * @retval true if the entry was set successfully, false otherwise.
  */
-bool set_ddt_entry_v2(aaruformat_context *ctx, const uint64_t sector_address, bool negative, const uint64_t offset,
+bool set_ddt_entry_v2(aaruformat_context *ctx, const uint64_t sector_address, const bool negative, const uint64_t offset,
                       const uint64_t block_offset, const uint8_t sector_status, uint64_t *ddt_entry)
 {
     TRACE("Entering set_ddt_entry_v2(%p, %" PRIu64 ", %d, %llu, %llu, %d)", ctx, sector_address, negative, offset,
@@ -999,9 +999,9 @@ bool set_ddt_entry_v2(aaruformat_context *ctx, const uint64_t sector_address, bo
     }
 
     if(ctx->user_data_ddt_header.tableShift > 0)
-        return set_ddt_multi_level_v2(ctx, sector_address, false, offset, block_offset, sector_status, ddt_entry);
+        return set_ddt_multi_level_v2(ctx, sector_address, negative, offset, block_offset, sector_status, ddt_entry);
 
-    return set_ddt_single_level_v2(ctx, sector_address, false, offset, block_offset, sector_status, ddt_entry);
+    return set_ddt_single_level_v2(ctx, sector_address, negative, offset, block_offset, sector_status, ddt_entry);
 }
 
 /**
@@ -1045,7 +1045,7 @@ bool set_ddt_single_level_v2(aaruformat_context *ctx, uint64_t sector_address, c
 
     // Calculate positive or negative sector
     if(negative)
-        sector_address -= ctx->user_data_ddt_header.negative;
+        sector_address = ctx->user_data_ddt_header.negative - sector_address;
     else
         sector_address += ctx->user_data_ddt_header.negative;
 
@@ -1062,10 +1062,12 @@ bool set_ddt_single_level_v2(aaruformat_context *ctx, uint64_t sector_address, c
             TRACE("Exiting set_ddt_single_level_v2() = false");
             return false;
         }
-
-        *ddt_entry |= (uint64_t)sector_status << 60;
     }
 
+    // Sector status can be different from previous deduplicated sector
+    *ddt_entry &= 0x0FFFFFFFFFFFFFFF;
+    *ddt_entry |= (uint64_t)sector_status << 60;
+
     TRACE("Setting big single-level DDT entry %d to %ull", sector_address, (uint64_t)*ddt_entry);
     ctx->user_data_ddt2[sector_address] = *ddt_entry;
 
@@ -1125,7 +1127,7 @@ bool set_ddt_multi_level_v2(aaruformat_context *ctx, uint64_t sector_address, bo
 
     // Calculate positive or negative sector
     if(negative)
-        sector_address -= ctx->user_data_ddt_header.negative;
+        sector_address = ctx->user_data_ddt_header.negative - sector_address;
     else
         sector_address += ctx->user_data_ddt_header.negative;
 
@@ -1154,10 +1156,12 @@ bool set_ddt_multi_level_v2(aaruformat_context *ctx, uint64_t sector_address, bo
                 TRACE("Exiting set_ddt_multi_level_v2() = false");
                 return false;
             }
-
-            *ddt_entry |= (uint64_t)sector_status << 60;
         }
 
+        // Sector status can be different from previous deduplicated sector
+        *ddt_entry &= 0x0FFFFFFFFFFFFFFF;
+        *ddt_entry |= (uint64_t)sector_status << 60;
+
         TRACE("Setting small secondary DDT entry %d to %ull", sector_address % items_per_ddt_entry,
               (uint64_t)*ddt_entry);
         ctx->cached_secondary_ddt2[sector_address % items_per_ddt_entry] = *ddt_entry;
@@ -1637,10 +1641,12 @@ bool set_ddt_multi_level_v2(aaruformat_context *ctx, uint64_t sector_address, bo
             TRACE("Exiting set_ddt_multi_level_v2() = false");
             return false;
         }
-
-        *ddt_entry |= (uint64_t)sector_status << 60;
     }
 
+    // Sector status can be different from previous deduplicated sector
+    *ddt_entry &= 0x0FFFFFFFFFFFFFFF;
+    *ddt_entry |= (uint64_t)sector_status << 60;
+
     TRACE("Setting big secondary DDT entry %d to %ull", sector_address % items_per_ddt_entry, (uint64_t)*ddt_entry);
     ctx->cached_secondary_ddt2[sector_address % items_per_ddt_entry] = *ddt_entry;
 

src/read.c

@@ -704,7 +704,7 @@ AARU_EXPORT int32_t AARU_CALL aaruf_read_track_sector(void *context, uint8_t *da
 
     if(ctx->image_info.MetadataMediaType != OpticalDisc)
     {
-        FATAL("Incorrect media type %d, expected OpticalDisc", ctx->imageInfo.XmlMediaType);
+        FATAL("Incorrect media type %d, expected OpticalDisc", ctx->image_info.MetadataMediaType);
 
         TRACE("Exiting aaruf_read_track_sector() = AARUF_ERROR_INCORRECT_MEDIA_TYPE");
         return AARUF_ERROR_INCORRECT_MEDIA_TYPE;
@@ -888,7 +888,7 @@ AARU_EXPORT int32_t AARU_CALL aaruf_read_sector_long(void *context, const uint64
 
     // Calculate positive or negative sector
     if(negative)
-        corrected_sector_address -= ctx->user_data_ddt_header.negative;
+        corrected_sector_address = ctx->user_data_ddt_header.negative - sector_address;
     else
         corrected_sector_address += ctx->user_data_ddt_header.negative;
 
@@ -1282,7 +1282,7 @@ AARU_EXPORT int32_t AARU_CALL aaruf_read_sector_long(void *context, const uint64
                             tag_length = 24;
                             break;
                         default:
-                            FATAL("Unsupported media type %d", ctx->imageInfo.MediaType);
+                            FATAL("Unsupported media type %d", ctx->image_info.MediaType);
 
                             TRACE("Exiting aaruf_read_sector_long() = AARUF_ERROR_INCORRECT_MEDIA_TYPE");
                             return AARUF_ERROR_INCORRECT_MEDIA_TYPE;
@@ -1339,13 +1339,13 @@ AARU_EXPORT int32_t AARU_CALL aaruf_read_sector_long(void *context, const uint64
                     TRACE("Exiting aaruf_read_sector_long() = AARUF_STATUS_OK");
                     return AARUF_STATUS_OK;
                 default:
-                    FATAL("Incorrect media type %d for long sector reading", ctx->imageInfo.MediaType);
+                    FATAL("Incorrect media type %d for long sector reading", ctx->image_info.MediaType);
 
                     TRACE("Exiting aaruf_read_sector_long() = AARUF_ERROR_INCORRECT_MEDIA_TYPE");
                     return AARUF_ERROR_INCORRECT_MEDIA_TYPE;
             }
         default:
-            FATAL("Incorrect media type %d for long sector reading", ctx->imageInfo.MediaType);
+            FATAL("Incorrect media type %d for long sector reading", ctx->image_info.MediaType);
 
             TRACE("Exiting aaruf_read_sector_long() = AARUF_ERROR_INCORRECT_MEDIA_TYPE");
             return AARUF_ERROR_INCORRECT_MEDIA_TYPE;
@@ -1529,7 +1529,7 @@ AARU_EXPORT int32_t AARU_CALL aaruf_read_sector_tag(const void *context, const u
 
     // Calculate positive or negative sector
     if(negative)
-        corrected_sector_address -= ctx->user_data_ddt_header.negative;
+        corrected_sector_address = ctx->user_data_ddt_header.negative - sector_address;
     else
         corrected_sector_address += ctx->user_data_ddt_header.negative;
 

src/verify.c

@@ -225,195 +225,242 @@ AARU_EXPORT int32_t AARU_CALL aaruf_verify_image(void *context)
         goto cleanup;
     }
 
+    uint64_t crc_length;
+    const unsigned int entry_count = utarray_len(index_entries);
+
+    for(unsigned int i = 0; i < entry_count; i++)
     {
-        const unsigned int entry_count = utarray_len(index_entries);
+        IndexEntry *entry = utarray_eltptr(index_entries, i);
+        TRACE("Checking block with type %4.4s at position %" PRIu64, (char *)&entry->blockType, entry->offset);
 
-        for(unsigned int i = 0; i < entry_count; i++)
+        if(fseek(ctx->imageStream, entry->offset, SEEK_SET) != 0)
         {
-            IndexEntry *entry = utarray_eltptr(index_entries, i);
-            TRACE("Checking block with type %4.4s at position %" PRIu64, (char *)&entry->blockType, entry->offset);
+            FATAL("Could not seek to block at offset %" PRIu64, entry->offset);
+            status = AARUF_ERROR_CANNOT_READ_BLOCK;
+            goto cleanup;
+        }
 
-            if(fseek(ctx->imageStream, entry->offset, SEEK_SET) != 0)
-            {
-                FATAL("Could not seek to block at offset %" PRIu64, entry->offset);
-                status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                goto cleanup;
-            }
-
-            switch(entry->blockType)
-            {
-                case DataBlock:
-                    read_bytes = fread(&block_header, 1, sizeof(BlockHeader), ctx->imageStream);
-                    if(read_bytes != sizeof(BlockHeader))
-                    {
-                        FATAL("Could not read block header");
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    crc64_context = aaruf_crc64_init();
-                    if(crc64_context == NULL)
-                    {
-                        FATAL("Could not initialize CRC64 context");
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    status = update_crc64_from_stream(ctx->imageStream, block_header.cmpLength, buffer, VERIFY_SIZE,
-                                                      crc64_context, "data block");
-                    if(status != AARUF_STATUS_OK) goto cleanup;
-
-                    if(aaruf_crc64_final(crc64_context, &crc64) != 0)
-                    {
-                        FATAL("Could not finalize CRC64 for data block");
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
-
-                    if(crc64 != block_header.cmpCrc64)
-                    {
-                        FATAL("Expected block CRC 0x%16llX but got 0x%16llX", block_header.cmpCrc64, crc64);
-                        status = AARUF_ERROR_INVALID_BLOCK_CRC;
-                        goto cleanup;
-                    }
-
-                    aaruf_crc64_free(crc64_context);
-                    crc64_context = NULL;
-                    break;
-                case DeDuplicationTable:
-                    read_bytes = fread(&ddt_header, 1, sizeof(DdtHeader), ctx->imageStream);
-                    if(read_bytes != sizeof(DdtHeader))
-                    {
-                        FATAL("Could not read DDT header");
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    crc64_context = aaruf_crc64_init();
-                    if(crc64_context == NULL)
-                    {
-                        FATAL("Could not initialize CRC64 context");
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    status = update_crc64_from_stream(ctx->imageStream, ddt_header.cmpLength, buffer, VERIFY_SIZE,
-                                                      crc64_context, "DDT block");
-                    if(status != AARUF_STATUS_OK) goto cleanup;
-
-                    if(aaruf_crc64_final(crc64_context, &crc64) != 0)
-                    {
-                        FATAL("Could not finalize CRC64 for DDT block");
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
-
-                    if(crc64 != ddt_header.cmpCrc64)
-                    {
-                        FATAL("Expected DDT CRC 0x%16llX but got 0x%16llX", ddt_header.cmpCrc64, crc64);
-                        status = AARUF_ERROR_INVALID_BLOCK_CRC;
-                        goto cleanup;
-                    }
-
-                    aaruf_crc64_free(crc64_context);
-                    crc64_context = NULL;
-                    break;
-                case DeDuplicationTable2:
-                    read_bytes = fread(&ddt2_header, 1, sizeof(DdtHeader2), ctx->imageStream);
-                    if(read_bytes != sizeof(DdtHeader2))
-                    {
-                        FATAL("Could not read DDT2 header");
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    crc64_context = aaruf_crc64_init();
-                    if(crc64_context == NULL)
-                    {
-                        FATAL("Could not initialize CRC64 context");
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    status = update_crc64_from_stream(ctx->imageStream, ddt2_header.cmpLength, buffer, VERIFY_SIZE,
-                                                      crc64_context, "DDT2 block");
-                    if(status != AARUF_STATUS_OK) goto cleanup;
-
-                    if(aaruf_crc64_final(crc64_context, &crc64) != 0)
-                    {
-                        FATAL("Could not finalize CRC64 for DDT2 block");
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    if(crc64 != ddt2_header.cmpCrc64)
-                    {
-                        FATAL("Expected DDT2 CRC 0x%16llX but got 0x%16llX", ddt2_header.cmpCrc64, crc64);
-                        status = AARUF_ERROR_INVALID_BLOCK_CRC;
-                        goto cleanup;
-                    }
-
-                    aaruf_crc64_free(crc64_context);
-                    crc64_context = NULL;
-                    break;
-                case TracksBlock:
+        switch(entry->blockType)
+        {
+            case DataBlock:
+                read_bytes = fread(&block_header, 1, sizeof(BlockHeader), ctx->imageStream);
+                if(read_bytes != sizeof(BlockHeader))
                 {
-                    read_bytes = fread(&tracks_header, 1, sizeof(TracksHeader), ctx->imageStream);
-                    if(read_bytes != sizeof(TracksHeader))
-                    {
-                        FATAL("Could not read tracks header");
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    const uint64_t tracks_bytes = (uint64_t)tracks_header.entries * sizeof(TrackEntry);
-                    if(tracks_header.entries != 0 && tracks_bytes / sizeof(TrackEntry) != tracks_header.entries)
-                    {
-                        FATAL("Tracks header length overflow (entries=%u)", tracks_header.entries);
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    crc64_context = aaruf_crc64_init();
-                    if(crc64_context == NULL)
-                    {
-                        FATAL("Could not initialize CRC64 context");
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    status = update_crc64_from_stream(ctx->imageStream, tracks_bytes, buffer, VERIFY_SIZE,
-                                                      crc64_context, "tracks block");
-                    if(status != AARUF_STATUS_OK) goto cleanup;
-
-                    if(aaruf_crc64_final(crc64_context, &crc64) != 0)
-                    {
-                        FATAL("Could not finalize CRC64 for tracks block");
-                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
-                        goto cleanup;
-                    }
-
-                    if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
-
-                    if(crc64 != tracks_header.crc64)
-                    {
-                        FATAL("Expected tracks CRC 0x%16llX but got 0x%16llX", tracks_header.crc64, crc64);
-                        status = AARUF_ERROR_INVALID_BLOCK_CRC;
-                        goto cleanup;
-                    }
-
-                    aaruf_crc64_free(crc64_context);
-                    crc64_context = NULL;
-                    break;
+                    FATAL("Could not read block header");
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
                 }
-                default:
-                    TRACE("Ignoring block type %4.4s", (char *)&entry->blockType);
-                    break;
+
+                crc64_context = aaruf_crc64_init();
+                if(crc64_context == NULL)
+                {
+                    FATAL("Could not initialize CRC64 context");
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
+                }
+
+                // For LZMA compression, skip the 5-byte properties header
+                crc_length = block_header.cmpLength;
+                if(block_header.compression == Lzma || block_header.compression == LzmaClauniaSubchannelTransform)
+                {
+                    // Skip LZMA properties
+                    uint8_t props[LZMA_PROPERTIES_LENGTH];
+                    size_t  read_props = fread(props, 1, LZMA_PROPERTIES_LENGTH, ctx->imageStream);
+                    if(read_props != LZMA_PROPERTIES_LENGTH)
+                    {
+                        FATAL("Could not read LZMA properties");
+                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                        goto cleanup;
+                    }
+                    crc_length -= LZMA_PROPERTIES_LENGTH;
+                }
+
+                status = update_crc64_from_stream(ctx->imageStream, crc_length, buffer, VERIFY_SIZE, crc64_context,
+                                                  "data block");
+                if(status != AARUF_STATUS_OK) goto cleanup;
+
+                if(aaruf_crc64_final(crc64_context, &crc64) != 0)
+                {
+                    FATAL("Could not finalize CRC64 for data block");
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
+                }
+
+                if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
+
+                if(crc64 != block_header.cmpCrc64)
+                {
+                    FATAL("Expected block CRC 0x%16llX but got 0x%16llX", block_header.cmpCrc64, crc64);
+                    status = AARUF_ERROR_INVALID_BLOCK_CRC;
+                    goto cleanup;
+                }
+
+                aaruf_crc64_free(crc64_context);
+                crc64_context = NULL;
+                break;
+            case DeDuplicationTable:
+                read_bytes = fread(&ddt_header, 1, sizeof(DdtHeader), ctx->imageStream);
+                if(read_bytes != sizeof(DdtHeader))
+                {
+                    FATAL("Could not read DDT header");
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
+                }
+
+                crc64_context = aaruf_crc64_init();
+                if(crc64_context == NULL)
+                {
+                    FATAL("Could not initialize CRC64 context");
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
+                }
+
+                // For LZMA compression, skip the 5-byte properties header
+                crc_length = ddt_header.cmpLength;
+                if(ddt_header.compression == Lzma || ddt_header.compression == LzmaClauniaSubchannelTransform)
+                {
+                    // Skip LZMA properties
+                    uint8_t props[LZMA_PROPERTIES_LENGTH];
+                    size_t  read_props = fread(props, 1, LZMA_PROPERTIES_LENGTH, ctx->imageStream);
+                    if(read_props != LZMA_PROPERTIES_LENGTH)
+                    {
+                        FATAL("Could not read LZMA properties");
+                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                        goto cleanup;
+                    }
+                    crc_length -= LZMA_PROPERTIES_LENGTH;
+                }
+
+                status = update_crc64_from_stream(ctx->imageStream, crc_length, buffer, VERIFY_SIZE, crc64_context,
+                                                  "data block");
+                if(status != AARUF_STATUS_OK) goto cleanup;
+
+                if(aaruf_crc64_final(crc64_context, &crc64) != 0)
+                {
+                    FATAL("Could not finalize CRC64 for DDT block");
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
+                }
+
+                if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
+
+                if(crc64 != ddt_header.cmpCrc64)
+                {
+                    FATAL("Expected DDT CRC 0x%16llX but got 0x%16llX", ddt_header.cmpCrc64, crc64);
+                    status = AARUF_ERROR_INVALID_BLOCK_CRC;
+                    goto cleanup;
+                }
+
+                aaruf_crc64_free(crc64_context);
+                crc64_context = NULL;
+                break;
+            case DeDuplicationTable2:
+                read_bytes = fread(&ddt2_header, 1, sizeof(DdtHeader2), ctx->imageStream);
+                if(read_bytes != sizeof(DdtHeader2))
+                {
+                    FATAL("Could not read DDT2 header");
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
+                }
+
+                crc64_context = aaruf_crc64_init();
+                if(crc64_context == NULL)
+                {
+                    FATAL("Could not initialize CRC64 context");
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
+                }
+
+                // For LZMA compression, skip the 5-byte properties header
+                crc_length = ddt2_header.cmpLength;
+                if(ddt2_header.compression == Lzma || ddt2_header.compression == LzmaClauniaSubchannelTransform)
+                {
+                    // Skip LZMA properties
+                    uint8_t props[LZMA_PROPERTIES_LENGTH];
+                    size_t  read_props = fread(props, 1, LZMA_PROPERTIES_LENGTH, ctx->imageStream);
+                    if(read_props != LZMA_PROPERTIES_LENGTH)
+                    {
+                        FATAL("Could not read LZMA properties");
+                        status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                        goto cleanup;
+                    }
+                    crc_length -= LZMA_PROPERTIES_LENGTH;
+                }
+
+                status = update_crc64_from_stream(ctx->imageStream, crc_length, buffer, VERIFY_SIZE, crc64_context,
+                                                  "data block");
+                if(status != AARUF_STATUS_OK) goto cleanup;
+
+                if(aaruf_crc64_final(crc64_context, &crc64) != 0)
+                {
+                    FATAL("Could not finalize CRC64 for DDT2 block");
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
+                }
+
+                if(crc64 != ddt2_header.cmpCrc64)
+                {
+                    FATAL("Expected DDT2 CRC 0x%16llX but got 0x%16llX", ddt2_header.cmpCrc64, crc64);
+                    status = AARUF_ERROR_INVALID_BLOCK_CRC;
+                    goto cleanup;
+                }
+
+                aaruf_crc64_free(crc64_context);
+                crc64_context = NULL;
+                break;
+            case TracksBlock:
+            {
+                read_bytes = fread(&tracks_header, 1, sizeof(TracksHeader), ctx->imageStream);
+                if(read_bytes != sizeof(TracksHeader))
+                {
+                    FATAL("Could not read tracks header");
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
+                }
+
+                const uint64_t tracks_bytes = (uint64_t)tracks_header.entries * sizeof(TrackEntry);
+                if(tracks_header.entries != 0 && tracks_bytes / sizeof(TrackEntry) != tracks_header.entries)
+                {
+                    FATAL("Tracks header length overflow (entries=%u)", tracks_header.entries);
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
+                }
+
+                crc64_context = aaruf_crc64_init();
+                if(crc64_context == NULL)
+                {
+                    FATAL("Could not initialize CRC64 context");
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
+                }
+
+                status = update_crc64_from_stream(ctx->imageStream, tracks_bytes, buffer, VERIFY_SIZE, crc64_context,
+                                                  "tracks block");
+                if(status != AARUF_STATUS_OK) goto cleanup;
+
+                if(aaruf_crc64_final(crc64_context, &crc64) != 0)
+                {
+                    FATAL("Could not finalize CRC64 for tracks block");
+                    status = AARUF_ERROR_CANNOT_READ_BLOCK;
+                    goto cleanup;
+                }
+
+                if(ctx->header.imageMajorVersion <= AARUF_VERSION_V1) crc64 = bswap_64(crc64);
+
+                if(crc64 != tracks_header.crc64)
+                {
+                    FATAL("Expected tracks CRC 0x%16llX but got 0x%16llX", tracks_header.crc64, crc64);
+                    status = AARUF_ERROR_INVALID_BLOCK_CRC;
+                    goto cleanup;
+                }
+
+                aaruf_crc64_free(crc64_context);
+                crc64_context = NULL;
+                break;
             }
+            default:
+                TRACE("Ignoring block type %4.4s", (char *)&entry->blockType);
+                break;
         }
     }
 

src/write.c

@@ -604,7 +604,7 @@ AARU_EXPORT int32_t AARU_CALL aaruf_write_sector_long(void *context, uint64_t se
 
             // Calculate positive or negative sector
             if(negative)
-                corrected_sector_address -= ctx->user_data_ddt_header.negative;
+                corrected_sector_address = ctx->user_data_ddt_header.negative - sector_address;
             else
                 corrected_sector_address += ctx->user_data_ddt_header.negative;
 
@@ -2127,7 +2127,7 @@ AARU_EXPORT int32_t AARU_CALL aaruf_write_sector_tag(void *context, const uint64
 
     // Calculate positive or negative sector
     if(negative)
-        corrected_sector_address -= ctx->user_data_ddt_header.negative;
+        corrected_sector_address = ctx->user_data_ddt_header.negative - sector_address;
     else
         corrected_sector_address += ctx->user_data_ddt_header.negative;
 

tests/create_image.cpp

@@ -738,3 +738,120 @@ TEST_F(CreateImageFixture, create_audio_image)
     close_result = aaruf_close(context);
     EXPECT_EQ(close_result, AARUF_STATUS_OK) << "Failed to close image";
 }
+
+
+TEST_F(CreateImageFixture, create_image_negative_sectors)
+{
+    char path[PATH_MAX];
+    char filename[PATH_MAX];
+
+    getcwd(path, PATH_MAX);
+    snprintf(filename, PATH_MAX, "%s/data/random", path);
+
+    // Open random file
+    FILE *f = fopen(filename, "rb");
+    ASSERT_NE(f, nullptr) << "Failed to open random data file";
+
+    uint8_t *buffer = static_cast<uint8_t *>(malloc(1048576));
+    fread(buffer, 1, 1048576, f);
+    fclose(f);
+
+    constexpr size_t total_sectors = 128 * 1024 * 1024 / 512;  // 128 MiB / 512 bytes
+
+    // Create image
+    void *context = aaruf_create("test.aif", 1, 512, total_sectors, 300, 0, "deduplicate=true;compress=true",
+                                 reinterpret_cast<const uint8_t *>("gtest"), 10, 0, 0, false);
+
+    // Verify that the file was successfully opened
+    ASSERT_NE(context, nullptr) << "Failed to create test.aif";
+
+    crc64_ctx *ctx           = aaruf_crc64_init();
+    uint64_t   generated_crc = 0;
+
+    // Write data in sectors of 512 bytes
+    for(size_t sector = 1; sector <= 150; ++sector)
+    {
+        const size_t  buffer_offset = sector * 512 % 1048576;  // Roll back to start when reaching end
+        const int32_t write_result =
+            aaruf_write_sector(context, sector, true, buffer + buffer_offset, SectorStatusDumped, 512);
+        ASSERT_EQ(write_result, AARUF_STATUS_OK) << "Failed to write negative sector " << sector;
+
+        aaruf_crc64_update(ctx, buffer + buffer_offset, 512);
+    }
+
+    // Write data in sectors of 512 bytes
+    for(size_t sector = 0; sector < total_sectors; ++sector)
+    {
+        const size_t  buffer_offset = sector * 512 % 1048576;  // Roll back to start when reaching end
+        const int32_t write_result =
+            aaruf_write_sector(context, sector, false, buffer + buffer_offset, SectorStatusDumped, 512);
+        ASSERT_EQ(write_result, AARUF_STATUS_OK) << "Failed to write sector " << sector;
+
+        aaruf_crc64_update(ctx, buffer + buffer_offset, 512);
+    }
+
+    aaruf_crc64_final(ctx, &generated_crc);
+    aaruf_crc64_free(ctx);
+
+    // Close the image
+    int32_t close_result = aaruf_close(context);
+    ASSERT_EQ(close_result, AARUF_STATUS_OK) << "Failed to close image";
+    free(buffer);
+
+    // Reopen the image
+    context = aaruf_open("test.aif", false, NULL);
+    ASSERT_NE(context, nullptr) << "Failed to open test.aif";
+
+    // Get image info to verify it's a valid image
+    ImageInfo     image_info;
+    const int32_t result = aaruf_get_image_info(context, &image_info);
+
+    ASSERT_EQ(result, AARUF_STATUS_OK) << "Failed to get image info";
+
+    // Basic sanity checks on the image info
+    ASSERT_EQ(image_info.HasPartitions, false) << "Image should not have partitions";
+    ASSERT_EQ(image_info.HasSessions, false) << "Image should not have sessions";
+    ASSERT_EQ(image_info.Sectors, total_sectors) << "Unexpected number of sectors";
+    ASSERT_EQ(image_info.SectorSize, 512) << "Unexpected sector size";
+    ASSERT_STREQ(image_info.Version, "2.0") << "Unexpected image version";
+    ASSERT_STREQ(image_info.Application, "gtest") << "Unexpected application name";
+    ASSERT_STREQ(image_info.ApplicationVersion, "0.0") << "Unexpected application version";
+    ASSERT_EQ(image_info.MediaType, 1) << "Unexpected media type";
+    ASSERT_EQ(image_info.MetadataMediaType, 1) << "Unexpected metadata media type";
+
+    ctx          = aaruf_crc64_init();
+    uint64_t crc = 0;
+
+    for(int i = 1; i <= 150; i++)
+    {
+        uint8_t  sector_buffer[512];
+        uint32_t length        = sizeof(sector_buffer);
+        uint8_t  sector_status = 0;
+
+        const int32_t read_result = aaruf_read_sector(context, i, true, sector_buffer, &length, &sector_status);
+        EXPECT_EQ(read_result, AARUF_STATUS_OK) << "Failed to read negative sector " << i;
+        EXPECT_EQ(length, 512U) << "Unexpected length for negative sector " << i;
+        aaruf_crc64_update(ctx, sector_buffer, 512);
+    }
+
+    for(int i = 0; i < total_sectors; i++)
+    {
+        uint8_t  sector_buffer[512];
+        uint32_t length        = sizeof(sector_buffer);
+        uint8_t  sector_status = 0;
+
+        const int32_t read_result = aaruf_read_sector(context, i, false, sector_buffer, &length, &sector_status);
+        EXPECT_EQ(read_result, AARUF_STATUS_OK) << "Failed to read sector " << i;
+        EXPECT_EQ(length, 512U) << "Unexpected length for sector " << i;
+        aaruf_crc64_update(ctx, sector_buffer, 512);
+    }
+
+    aaruf_crc64_final(ctx, &crc);
+    aaruf_crc64_free(ctx);
+
+    ASSERT_EQ(crc, generated_crc) << "Unexpected CRC64 for image data";
+
+    // Close the image
+    close_result = aaruf_close(context);
+    EXPECT_EQ(close_result, AARUF_STATUS_OK) << "Failed to close image";
+}