From 2d178a91b71b6e21b9480b0dfc405fd104dc0006 Mon Sep 17 00:00:00 2001
From: "amazon-q-developer[bot]"
 <208079219+amazon-q-developer[bot]@users.noreply.github.com>
Date: Sat, 16 May 2026 20:17:02 +0000
Subject: [PATCH] [skip ci] Fix UUEFI.c compilation errors and document
 experimental features for alpha

---
 TODO.md             | 123 ++++++++++++++++++++++++++++++++++++++++++++
 staging/src/UUEFI.c |   6 ++-
 2 files changed, 127 insertions(+), 2 deletions(-)
 create mode 100644 TODO.md

diff --git a/TODO.md b/TODO.md
new file mode 100644
index 0000000..7f24f7d
--- /dev/null
+++ b/TODO.md
@@ -0,0 +1,123 @@
+# PhoenixGuard TODO - Features Not Ready for Alpha
+
+This document tracks features that exist in the codebase but are not yet ready for production use in the alpha release.
+
+---
+
+## 🚨 Critical: UUEFI Variable Editing Features
+
+**Status**: ⚠️ EXPERIMENTAL - Code Complete but UNTESTED on real hardware
+
+### Features Implemented
+
+The UUEFI diagnostic tool (staging/src/UUEFI.c) includes sophisticated variable editing capabilities:
+
+- **Variable Editing** (`EditVariable()` function)
+  - Can modify scalar (1/2/4/8 byte) UEFI variables
+  - Can delete vendor-specific variables
+  - Supports enable/disable operations
+
+- **Nuclear Wipe Menu** (`ShowNuclearWipeMenu()` function)
+  - Option 1: Vendor Variable Wipe (removes non-critical vendor vars)
+  - Option 2: Full NVRAM Reset (resets all non-security variables)
+  - Option 3: Disk Wiping Information (informational only)
+  - Option 4: Complete Nuclear Wipe workflow
+
+### Safety Mechanisms
+
+✅ These features include robust safety guards:
+
+1. **GuardVariableModification()** - Prevents modifications when:
+   - SecureBoot is enabled but no db keys exist (broken state)
+   - System is in setup mode with SecureBoot enabled
+   - Attempting to modify security variables (PK, KEK, db, dbx)
+
+2. **UpdateVariableWithBackup()** - Ensures safe writes:
+   - Creates backup before modification
+   - Verifies write by reading back the variable
+   - Rolls back to original value if verification fails
+   - Returns EFI_COMPROMISED_DATA if verification fails
+
+3. **Confirmation Prompts**:
+   - Requires typing "WIPE" or "RESET" for destructive operations
+   - Multiple confirmation steps for nuclear wipe
+   - Clear warnings about data loss and risks
+
+### Why Not Ready for Alpha
+
+❌ **Hardware Testing Gap**: These features have NOT been tested on:
+- Real UEFI firmware (only QEMU smoke tested)
+- Various OEM implementations (ASUS, Dell, HP, Lenovo, etc.)
+- Different SecureBoot configurations
+- Edge cases like broken NVRAM or firmware bugs
+
+❌ **Risk Assessment**: While safety guards are in place:
+- A firmware bug could bypass our guards
+- NVRAM corruption could occur during power loss
+- Vendor-specific variables may have undocumented dependencies
+- "Safe" variables might not be safe on all hardware
+
+### Action Items Before Beta
+
+- [ ] Test variable editing on 5+ different OEM systems
+- [ ] Test in broken SecureBoot states (SB enabled, no keys)
+- [ ] Verify rollback mechanism works on firmware errors
+- [ ] Test nuclear wipe on sacrificial test hardware
+- [ ] Document OEM-specific variable behaviors
+- [ ] Create hardware compatibility matrix
+- [ ] Add detection for known-bad firmware versions
+
+### Recommended Alpha Approach
+
+**Option 1**: Gate off write features entirely
+```
+- Disable Edit Variable menu option (option 6)
+- Disable Nuclear Wipe menu (option 8)
+- Keep read-only diagnostics (options 1-5, 7, 9)
+```
+
+**Option 2**: Add scary warnings
+```
+- Keep features enabled but add:
+  "⚠️⚠️⚠️ EXPERIMENTAL - NOT TESTED ON REAL HARDWARE ⚠️⚠️⚠️"
+  "USE AT YOUR OWN RISK - MAY BRICK YOUR SYSTEM"
+  "THIS FEATURE IS FOR TESTING ONLY"
+```
+
+---
+
+## 🧪 Testing Needed: Boot Media Scanning
+
+**Status**: ⚠️ Needs False Positive Rate Validation
+
+### Feature Description
+
+UUEFI includes boot media anomaly detection (`AnalyzeCurrentBootMedia()`):
+- Scans LBA0 for 0x55AA signature
+- Validates GPT headers and protective MBR
+- Checks for filesystem signatures on EFI partition
+- Detects multiple active MBR partitions
+
+### Concern
+
+The heuristics may flag legitimate configurations as suspicious:
+- Some firmware implementations have unusual partition layouts
+- Live USB systems may have non-standard structures
+- Recovery partitions might lack standard signatures
+
+### Action Items
+
+- [ ] Test on 20+ different boot media types
+- [ ] Document known false positives
+- [ ] Adjust heuristic sensitivity
+- [ ] Add whitelist for known-good anomalies
+
+---
+
+## 📝 Documentation Needed
+
+- [ ] Complete UUEFI user guide
+- [ ] Hardware compatibility list
+- [ ] Known issues and workarounds
+- [ ] Safe usage guidelines
+- [ ] Recovery procedures if variables are corrupted
diff --git a/staging/src/UUEFI.c b/staging/src/UUEFI.c
index c13b5d0..4c49107 100644
--- a/staging/src/UUEFI.c
+++ b/staging/src/UUEFI.c
@@ -1251,8 +1251,6 @@ EditVariable(
   IN UINTN VarIndex
   )
 {
-  BOOLEAN AllowModification;
-  CHAR16 WarningMessage[MAX_WARNING_MESSAGE_SIZE];
   if (VarIndex >= gVariableCount) {
     return EFI_INVALID_PARAMETER;
   }
@@ -1276,6 +1274,8 @@ EditVariable(
   Print(L"Current Size: %lu bytes\n", var->DataSize);
   
   UINTN DataSize = var->DataSize;
+  VOID *CurrentData = AllocateZeroPool(DataSize);
+  
   EFI_STATUS Status = gRT->GetVariable(
     var->Name,
     &var->VendorGuid,
@@ -1313,6 +1313,8 @@ EditVariable(
   
   Print(L"\n⚠ WARNING: Incorrect values may cause system instability!\n");
   Print(L"\nEdit Options:\n");
+  
+  BOOLEAN IsScalarValue = IsScalarVariableSize(DataSize);
   if (IsScalarValue) {
     Print(L"  1. Set to 0 (Disable)\n");
     Print(L"  2. Set to 1 (Enable)\n");