UEFI firmware image viewer and editor
This report presents the forensic synthetic code analysis of LongSoft/UEFITool, a C project with 5,569 GitHub stars. SynthScan v2.0 examined 117,184 lines of code across 292 source files, recording 296 pattern matches distributed across 3 syntactic categories. The overall adjusted score of 2.5 places this repository in the Likely human-written band.
The scanner applied 160+ deterministic lexical heuristics, multi-line block detectors, abstract syntax tree depth profilers, and a cross-file Jaccard similarity matrix to construct a statistically normalised synthetic code estimate. All matches are individually weighted by severity coefficient and contextual multiplier before summation, and the resulting headline score is temporally discounted to account for the repository's development history relative to the commercial emergence of large language model coding tooling (November 2022 onward).
This chart maps the temporal evolution of the adjusted synthetic code score across successive scan runs. An upward trajectory indicates ongoing incorporation of AI-generated code or expanding LLM-assisted scaffolding; a stable or declining trajectory may reflect active human refactoring, code removal, or the adoption of stricter authorship policies. The dashed secondary line (right axis) independently tracks total raw pattern hit count, which can diverge from the normalised score when codebase size changes significantly between scans.
Classifies detected patterns by their diagnostic confidence and structural impact. CRITICAL patterns (coefficient 10) represent definitive synthetic signatures — hallucinated imports, explicit LLM attribution metadata — virtually never produced by human authors. HIGH (5) indicates strong structural tells such as cross-file repetition or cross-linguistic idioms. MEDIUM (2) covers recognisable conversational padding and AI-specific vocabulary. LOW (1) captures subtle indicators like tautological comments and generic boilerplate that require density to carry independent signal.
This horizontal bar chart decomposes the repository's raw synthetic code score by top-level directory, allowing you to pinpoint precisely which modules or components carry the highest AI authorship density. Directories with disproportionately high scores relative to their size warrant targeted manual review: concentrated AI signatures often trace back to mass-generated configuration layers, auto-ported test suites, LLM-scaffolded boilerplate classes, or entire subsystems authored under heavy copilot assistance. Use this view to prioritise your human code-review effort.
The scanner identified 296 distinct pattern matches across 3 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a statistically significant AI authorship indicator. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.
Reading the findings table: The Severity column indicates the diagnostic confidence level (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — comment-context matches receive a ×1.5 weight because LLMs systematically over-annotate. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier as dense clusters constitute far stronger evidence of synthetic authorship than isolated hits.
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | fuzzing/afl_driver.cpp | 41 | If 1, close stdout at startup. If 2 close stderr; if 3 close both. | COMMENT |
| LOW | fuzzing/afl_driver.cpp | 61 | #define LIBFUZZER_NETBSD 0 | COMMENT |
| LOW | fuzzing/afl_driver.cpp | 81 | #define LIBFUZZER_OPENBSD 0 | COMMENT |
| LOW | UEFITool/uefitool.h | 21 | #include <QDropEvent> | COMMENT |
| LOW | UEFITool/uefitool.h | 41 | COMMENT | |
| LOW | UEFITool/QHexView/include/QHexView/qhexview.h | 1 | #pragma once | COMMENT |
| LOW | UEFITool/QHexView/src/qhexview.cpp | 1 | #include <QApplication> | COMMENT |
| LOW | UEFITool/QHexView/src/model/qhexutils.cpp | 1 | #include "QHexView/model/qhexdocument.h" | COMMENT |
| LOW | UEFITool/QHexView/src/dialogs/hexfinddialog.cpp | 1 | #include <QCheckBox> | COMMENT |
| LOW | common/treemodel.h | 21 | COMMENT | |
| LOW | common/treemodel.h | 41 | #include "basetypes.h" | COMMENT |
| LOW | common/intel_fit.h | 21 | COMMENT | |
| LOW | common/intel_fit.h | 41 | //#define INTEL_FIT_TYPE_INTEL_RESERVED_0E 0x0E | COMMENT |
| LOW | common/intel_fit.h | 81 | // Version must be 0x0100 | COMMENT |
| LOW | common/intel_fit.h | 101 | // One MTRR base/limit pair is used to map Startup ACM, so | COMMENT |
| LOW | common/intel_fit.h | 141 | // | COMMENT |
| LOW | common/ustring.h | 21 | #else | COMMENT |
| LOW | common/nvram.h | 41 | UINT16 Size; // Size of the entry including header | COMMENT |
| LOW | common/nvram.h | 61 | #define NVRAM_NVAR_ENTRY_EXT_AUTH_WRITE 0x10 | COMMENT |
| LOW | common/nvram.h | 141 | COMMENT | |
| LOW | common/nvram.h | 221 | // Apple System Flags store | COMMENT |
| LOW | common/nvram.h | 241 | // | COMMENT |
| LOW | common/nvram.h | 281 | COMMENT | |
| LOW | common/ffs.h | 141 | COMMENT | |
| LOW | common/ffs.h | 161 | #define EFI_FVB_ALIGNMENT_4 0x00020000 | COMMENT |
| LOW | common/ffs.h | 181 | #define EFI_FVB2_WRITE_ENABLED_CAP 0x00000010 | COMMENT |
| LOW | common/ffs.h | 201 | #define EFI_FVB2_ALIGNMENT_256 0x00080000 | COMMENT |
| LOW | common/ffs.h | 301 | // Standard data checksum, used if FFS_ATTRIB_CHECKSUM is clear | COMMENT |
| LOW | common/ffs.h | 321 | #define EFI_FV_FILETYPE_MM_CORE_STANDALONE 0x0F | COMMENT |
| LOW | common/ffs.h | 341 | COMMENT | |
| LOW | common/ffs.h | 401 | // File section types | COMMENT |
| LOW | common/ffs.h | 521 | #define EFI_DEP_OPCODE_SIZE 1 | COMMENT |
| LOW | common/ffs.h | 541 | #define EFI_DEP_END 0x08 | COMMENT |
| LOW | common/ffs.h | 601 | UINT32 UmaCacheable : 1; | COMMENT |
| LOW | common/ffs.h | 621 | #define BPDT_ENTRY_TYPE_UFS_GPP_LUN 13 | COMMENT |
| LOW | common/ffs.h | 641 | #define BPDT_ENTRY_TYPE_ISIF 33 | COMMENT |
| LOW | common/ffs.h | 721 | #define CPD_EXT_TYPE_INIT_SCRIPT 1 | COMMENT |
| LOW | common/ffs.h | 741 | #define CPD_EXT_TYPE_SECURE_TOKEN 21 | COMMENT |
| LOW | common/ffs.h | 981 | UINT8 NamespaceIdC; | COMMENT |
| LOW | common/descriptor.h | 21 | #pragma pack(push,1) | COMMENT |
| LOW | common/descriptor.h | 341 | // PLATFORM_STONEYRIDGE 15h (60-6fh) 10220B00h | COMMENT |
| LOW | common/basetypes.h | 21 | // TODO: improve | COMMENT |
| LOW | common/basetypes.h | 41 | #define U_UNKNOWN_FFS 18 | COMMENT |
| LOW | common/basetypes.h | 61 | #define U_INVALID_CAPSULE 38 | COMMENT |
| LOW | common/basetypes.h | 101 | typedef size_t UINTN; | COMMENT |
| LOW | common/basetypes.h | 121 | #define OUT | COMMENT |
| LOW | common/basetypes.h | 141 | #define COMPRESSION_ALGORITHM_BROTLI 10 | COMMENT |
| LOW | common/basetypes.h | 161 | COMMENT | |
| LOW | common/basetypes.h | 201 | #define ALIGN4(Value) (((Value)+3) & ~3) | COMMENT |
| LOW | common/basetypes.h | 221 | #define TCG_HASH_ALGORITHM_ID_SHA384 0x000C | COMMENT |
| LOW | common/peimage.h | 21 | COMMENT | |
| LOW | common/peimage.h | 41 | #define EFI_IMAGE_FILE_MACHINE_ARMNT 0x01c4 // ARMv7 (or higher) Thumb mode only | COMMENT |
| LOW | common/peimage.h | 101 | // Size of EFI_IMAGE_FILE_HEADER. | COMMENT |
| LOW | common/peimage.h | 121 | // | COMMENT |
| LOW | common/peimage.h | 141 | COMMENT | |
| LOW | common/peimage.h | 261 | #define EFI_IMAGE_SUBSYSTEM_WINDOWS_GUI 2 | COMMENT |
| LOW | common/peimage.h | 301 | #define EFI_IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x00000080 | COMMENT |
| LOW | common/peimage.h | 321 | #define EFI_IMAGE_SCN_MEM_READ 0x40000000 | COMMENT |
| LOW | common/peimage.h | 341 | #define EFI_IMAGE_SYM_TYPE_VOID 1 // no valid type | COMMENT |
| LOW | common/peimage.h | 361 | #define EFI_IMAGE_SYM_DTYPE_POINTER 1 | COMMENT |
| 230 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | common/kaitai/kaitaistream.cpp | 1124 | // Step 1: convert encoding name to codepage number | COMMENT |
| LOW | common/kaitai/kaitaistream.cpp | 1144 | // Step 2: convert bytes to UTF-16 ("wide char") string | COMMENT |
| LOW | common/kaitai/kaitaistream.cpp | 1198 | // Step 3: convert UTF-16 string to UTF-8 string | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | common/kaitai/kaitaistream.cpp | 1124 | // Step 1: convert encoding name to codepage number | COMMENT |
| LOW | common/kaitai/kaitaistream.cpp | 1144 | // Step 2: convert bytes to UTF-16 ("wide char") string | COMMENT |
| LOW | common/kaitai/kaitaistream.cpp | 1198 | // Step 3: convert UTF-16 string to UTF-8 string | COMMENT |