Merge pull request #119 from thepwrtank18/djgpp-rng

RNG bugfix for DOS (DJGPP)

.github/workflows/dos-djgpp.yml

@@ -37,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Source Tree
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup build environment
         run: |
@@ -64,8 +64,8 @@ jobs:
           git clone https://github.com/UMSKT/openssl.git openssl
           pushd openssl
           source ${{ github.workspace }}/djgpp/setenv
-          ./Configure no-threads -DOPENSSL_DEV_NO_ATOMICS --prefix=${{ github.workspace }}/djgpp DJGPP
-          make && make install
+          ./Configure no-threads no-tests -DOPENSSL_DEV_NO_ATOMICS --prefix=${{ github.workspace }}/djgpp DJGPP
+          make && make install_sw
           popd
 
       - name: Build
@@ -81,7 +81,7 @@ jobs:
           mv build/umskt.exe build/actions_upload/
 
       - name: Upload build artifact
-        uses: actions/upload-artifact@v3.1.2
+        uses: actions/upload-artifact@v4.6.2
         with:
           name: UMSKT-DOS
           path: build/actions_upload

.github/workflows/freebsd.yml

@@ -21,12 +21,12 @@
  name: C/C++ CI (FreeBSD) 
   
  on: 
-  push:
-    branches: [ "*" ]
-    paths-ignore: [ '**.md', 'doc/**', '.idea/**'] # If only these files are edited, skip
-  pull_request:
-    branches: [ "*" ]
-    paths-ignore: [ '**.md', 'doc/**', '.idea/**'] # If only these files are edited, skip
+  #push:
+  #  branches: [ "*" ]
+  #  paths-ignore: [ '**.md', 'doc/**', '.idea/**'] # If only these files are edited, skip
+  #pull_request:
+  #  branches: [ "*" ]
+  #  paths-ignore: [ '**.md', 'doc/**', '.idea/**'] # If only these files are edited, skip
 
   workflow_dispatch:
   
@@ -35,7 +35,7 @@
      runs-on: ubuntu-latest
      name: build-x86_64 
      steps: 
-     - uses: actions/checkout@v3 
+     - uses: actions/checkout@v4
   
      - name: Build & Test in FreeBSD 
        id: test 
@@ -59,7 +59,7 @@
            mv build/umskt build/actions_upload/umskt 
   
      - name: Upload build artifact 
-       uses: actions/upload-artifact@v3.1.2 
+       uses: actions/upload-artifact@v4.6.2
        with: 
          name: UMSKT-FreeBSD 
          path: build/actions_upload

.github/workflows/linux.yml

@@ -37,7 +37,7 @@ jobs:
           - arch: aarch64
     steps:
     - name: Checkout Source Tree
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Setup latest Alpine Linux for ${{ matrix.arch }}
       uses: jirutka/setup-alpine@v1
@@ -67,7 +67,7 @@ jobs:
           mv build/umskt build/actions_upload/umskt
 
     - name: Upload build artifact
-      uses: actions/upload-artifact@v3.1.2
+      uses: actions/upload-artifact@v4.6.2
       with:
         name: UMSKT-linux-${{ matrix.arch }}-static
         path: build/actions_upload

.github/workflows/macos.yml

@@ -35,7 +35,7 @@ jobs:
           - arch: x86_64
     steps:
       - name: Checkout Source Tree
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Configure and build UMSKT
         run: |
@@ -54,7 +54,7 @@ jobs:
           ./umskt
 
       - name: Upload build artifact
-        uses: actions/upload-artifact@v3.1.2
+        uses: actions/upload-artifact@v4.6.2
         with:
           name: UMSKT-macOS-${{ matrix.arch }}
           path: build/actions_upload

.github/workflows/windows.yml

@@ -23,126 +23,83 @@ name: C/C++ CI (Windows)
 on:
   push:
     branches: [ "*" ]
-    paths-ignore: [ '**.md', 'doc/**', '.idea/**'] # If only these files are edited, skip
+    paths-ignore: [ '**.md', 'doc/**', '.idea/**']
   workflow_dispatch:
 
 jobs:
-  build-32bit:
+  build-tdm:
     runs-on: windows-latest
+    strategy:
+      matrix:
+        arch: [x64, x86]
     steps:
-      # https://github.com/actions/runner-images/issues/6067#issuecomment-1213069040
-      - name: Install Windows XP Support for Visual Studio
+      - name: Setup TDM-GCC
         run: |
-          Set-Location "C:\Program Files (x86)\Microsoft Visual Studio\Installer\"
-          $InstallPath = "C:\Program Files\Microsoft Visual Studio\2022\Enterprise"
-          $componentsToAdd = @(
-            "Microsoft.VisualStudio.Component.WinXP"
-          )
-          [string]$workloadArgs = $componentsToAdd | ForEach-Object {" --add " +  $_}
-          $Arguments = ('/c', "vs_installer.exe", 'modify', '--installPath', "`"$InstallPath`"",$workloadArgs, '--quiet', '--norestart', '--nocache')
-          $process = Start-Process -FilePath cmd.exe -ArgumentList $Arguments -Wait -PassThru -WindowStyle Hidden
-          if ($process.ExitCode -eq 0)
-          {
-              Write-Host "components have been successfully added"
-              Get-ChildItem C:\ProgramData\Microsoft\VisualStudio\Packages\Microsoft.Windows.XPSupport.*
-          }
-          else
-          {
-              Write-Host "components were not installed"
-              exit 1
-          }
-
-      - name: Download And Install 32-bit OpenSSL
-        run: |
-          $installDir = "$Env:ProgramFiles\OpenSSL"
-          $installerURL = "https://slproweb.com/download/Win32OpenSSL-3_1_6.exe"
-          $installerName = "Win32OpenSSL-3_1_5.exe"
-          $installerPath = Join-Path -Path "${env:Temp}" -ChildPath "$installerName"
-
-          (New-Object System.Net.WebClient).DownloadFile($installerURL, $installerPath)
-          
-          Remove-Item "$installDir" -Force -Recurse
-          $installerArgs = '/silent', '/sp-', '/suppressmsgboxes', "/DIR=`"$installDir`""
-          Start-Process -FilePath $installerPath -ArgumentList $installerArgs -Wait -PassThru
+          Write-Host Downloading TDM-GCC v10.3.0...
+          Invoke-WebRequest -Uri 'https://github.com/jmeubank/tdm-gcc/releases/download/v10.3.0-tdm64-2/tdm64-gcc-10.3.0-2.exe' -OutFile 'C:\Windows\temp\TDM-GCC-64.exe'
+          Write-Host Creating directory...
+          New-Item -ItemType Directory -Path 'C:\TDM-GCC-64'
+          Write-Host Copying files [Set 1/3]...
+          Start-Process '7z' -ArgumentList 'e C:\Windows\temp\TDM-GCC-64.exe -oC:\TDM-GCC-64 -y' -Wait
+          Write-Host Copying files [Set 2/3]...
+          Start-Process '7z' -ArgumentList 'e C:\TDM-GCC-64\*.tar.xz -oC:\TDM-GCC-64 -y' -Wait
+          Write-Host Copying files [Set 3/3]...
+          Start-Process '7z' -ArgumentList 'x C:\TDM-GCC-64\*.tar -oC:\TDM-GCC-64 -y' -Wait
+          Write-Host Adding environment variables...
+          $env:PATH = 'C:\TDM-GCC-64\bin;' + $env:PATH
+          [Environment]::SetEnvironmentVariable('PATH', $env:PATH, [EnvironmentVariableTarget]::Machine)
 
       - name: Checkout Source Tree
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
-      - name: Setup MSBuild
-        uses: microsoft/setup-msbuild@v1
+      - name: Download OpenSSL-TDM release asset
+        shell: pwsh
+        run: |
+          if ('${{ matrix.arch }}' -eq 'x64') {
+            $url = "https://github.com/UMSKT/winactiontest/releases/download/openssl/OpenSSL-TDM-64.zip"
+            $dest = "$env:GITHUB_WORKSPACE/OpenSSL-TDM-64"
+            $libdir = "lib64"
+            $cmake_flags = "-m64"
+            $openssl_root = "$env:GITHUB_WORKSPACE/OpenSSL-TDM-64"
+          } else {
+            $url = "https://github.com/UMSKT/winactiontest/releases/download/openssl/OpenSSL-TDM-32.zip"
+            $dest = "$env:GITHUB_WORKSPACE/OpenSSL-TDM-32"
+            $libdir = "lib32"
+            $cmake_flags = "-m32"
+            $openssl_root = "$env:GITHUB_WORKSPACE/OpenSSL-TDM-32"
+          }
+          Invoke-WebRequest -Uri $url -OutFile "OpenSSL-TDM.zip"
+          Expand-Archive -Path "OpenSSL-TDM.zip" -DestinationPath $env:GITHUB_WORKSPACE
+          echo "OPENSSL_ROOT=$openssl_root" | Out-File -FilePath $env:GITHUB_ENV -Append
+          echo "OPENSSL_LIBDIR=$libdir" | Out-File -FilePath $env:GITHUB_ENV -Append
+          echo "CMAKE_FLAGS=$cmake_flags" | Out-File -FilePath $env:GITHUB_ENV -Append
 
-      - name: Configure UMSKT
-        uses: threeal/cmake-action@v1.2.0
-        with:
-          generator: "Visual Studio 17 2022"
-          options: CMAKE_SYSTEM_VERSION="5.1.2600"
-          args: -A "Win32" -T v141_xp
+      - name: Configure UMSKT (TDM-GCC ${{ matrix.arch }})
+        shell: pwsh
+        run: |
+          $env:PATH = 'C:\TDM-GCC-64\bin;' + $env:PATH
+          $OPENSSL_ROOT = "$env:OPENSSL_ROOT"
+          $OPENSSL_LIB = "$OPENSSL_ROOT/$env:OPENSSL_LIBDIR"
+          $OPENSSL_INC = "$OPENSSL_ROOT/include"
+          cmake -G "MinGW Makefiles" `
+            -DCMAKE_C_COMPILER="gcc" `
+            -DCMAKE_CXX_COMPILER="g++" `
+            -DOPENSSL_ROOT_DIR="$OPENSSL_ROOT" `
+            -DOPENSSL_INCLUDE_DIR="$OPENSSL_INC" `
+            -DOPENSSL_CRYPTO_LIBRARY="$OPENSSL_LIB/libcrypto.a" `
+            -DOPENSSL_SSL_LIBRARY="$OPENSSL_LIB/libssl.a" `
+            -DCMAKE_C_FLAGS="$env:CMAKE_FLAGS" `
+            -DCMAKE_CXX_FLAGS="$env:CMAKE_FLAGS" `
+            .
 
-      - name: Build UMSKT
-        working-directory: build
-        run: msbuild ALL_BUILD.vcxproj /P:Configuration=Release
+      - name: Build UMSKT (TDM-GCC ${{ matrix.arch }})
+        shell: pwsh
+        run: |
+          $env:PATH = 'C:\TDM-GCC-64\bin;' + $env:PATH
+          mingw32-make
 
       - name: Upload build artifact
-        uses: actions/upload-artifact@v3.1.2
+        uses: actions/upload-artifact@v4.6.2
         with:
-          name: UMSKT-Win32
-          path: build/Release
-
-  build-64bit:
-    runs-on: windows-latest
-    steps:
-      - name: Install Windows XP Support for Visual Studio
-        run: |
-          Set-Location "C:\Program Files (x86)\Microsoft Visual Studio\Installer\"
-          $InstallPath = "C:\Program Files\Microsoft Visual Studio\2022\Enterprise"
-          $componentsToAdd = @(
-            "Microsoft.VisualStudio.Component.WinXP"
-          )
-          [string]$workloadArgs = $componentsToAdd | ForEach-Object {" --add " +  $_}
-          $Arguments = ('/c', "vs_installer.exe", 'modify', '--installPath', "`"$InstallPath`"",$workloadArgs, '--quiet', '--norestart', '--nocache')
-          $process = Start-Process -FilePath cmd.exe -ArgumentList $Arguments -Wait -PassThru -WindowStyle Hidden
-          if ($process.ExitCode -eq 0)
-          {
-              Write-Host "components have been successfully added"
-              Get-ChildItem C:\ProgramData\Microsoft\VisualStudio\Packages\Microsoft.Windows.XPSupport.*
-          }
-          else
-          {
-              Write-Host "components were not installed"
-              exit 1
-          }
-    
-      - name: Download And Install 64-bit OpenSSL
-        run: |
-          $installDir = "$Env:ProgramFiles\OpenSSL"
-          $installerURL = "https://slproweb.com/download/Win64OpenSSL-3_1_6.exe"
-          $installerName = "Win64OpenSSL-3_1_6.exe"
-          $installerPath = Join-Path -Path "${env:Temp}" -ChildPath "$installerName"
-
-          (New-Object System.Net.WebClient).DownloadFile($installerURL, $installerPath)
-          
-          Remove-Item "$installDir" -Force -Recurse
-          $installerArgs = '/silent', '/sp-', '/suppressmsgboxes', "/DIR=`"$installDir`""
-          Start-Process -FilePath $installerPath -ArgumentList $installerArgs -Wait -PassThru
-
-      - name: Checkout Source Tree
-        uses: actions/checkout@v3
-
-      - name: Setup MSBuild
-        uses: microsoft/setup-msbuild@v1
-
-      - name: Configure UMSKT
-        uses: threeal/cmake-action@v1.2.0
-        with:
-          generator: "Visual Studio 17 2022"
-          args: -A "x64" -T "v141_xp"
-
-      - name: Build UMSKT
-        working-directory: build
-        run: msbuild ALL_BUILD.vcxproj /P:Configuration=Release
-
-      - name: Upload build artifact
-        uses: actions/upload-artifact@v3.1.2
-        with:
-          name: UMSKT-Win64
-          path: build/Release
+          name: UMSKT-TDM${{ matrix.arch }}
+          path: umskt.exe

.gitignore

@@ -252,4 +252,10 @@ _deps
 CMakeSettings.json
 
 # Visual Studio
-.vs/
+.vs/
+
+CPM_modules
+CPM_*.cmake
+cpm-package-lock.cmake
+*.a
+*_cmrc*

CMakeLists.txt

@@ -21,6 +21,13 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 3.12)
 PROJECT(UMSKT)
 
+# Force TDM-GCC on Windows if not using MSVC
+if (WIN32 AND NOT MSVC)
+    set(CMAKE_C_COMPILER "C:/TDM-GCC-64/bin/gcc.exe" CACHE FILEPATH "C Compiler" FORCE)
+    set(CMAKE_CXX_COMPILER "C:/TDM-GCC-64/bin/g++.exe" CACHE FILEPATH "C++ Compiler" FORCE)
+    message(STATUS "[UMSKT] Forcing use of TDM-GCC in C:/TDM-GCC-64")
+endif()
+
 SET(CMAKE_CXX_STANDARD 17)
 SET(CMAKE_OSX_SYSROOT "macosx" CACHE PATH "macOS SDK path")
 
@@ -207,6 +214,12 @@ ELSE()
     TARGET_INCLUDE_DIRECTORIES(umskt PUBLIC ${OPENSSL_INCLUDE_DIR})
     TARGET_LINK_LIBRARIES(umskt _umskt ${OPENSSL_CRYPTO_LIBRARIES} ${ZLIB_LIBRARIES} fmt nlohmann_json::nlohmann_json umskt::rc ${UMSKT_LINK_LIBS})
     TARGET_LINK_DIRECTORIES(umskt PUBLIC ${UMSKT_LINK_DIRS})
+
+    # Link required Windows system libraries for OpenSSL
+    if (WIN32)
+        target_link_libraries(umskt crypt32 ws2_32)
+    endif()
+
     IF(MSVC AND MSVC_MSDOS_STUB)
         SET_PROPERTY(TARGET umskt APPEND PROPERTY LINK_FLAGS /STUB:${MSVC_MSDOS_STUB})
     ENDIF()

keys.json

@@ -132,12 +132,18 @@
     "Windows Longhorn (6.0.4039.0 -> Pre PIDGENX)": {
       "BINK": ["74", "75"]
     },
+    "Expression Web 2007 / Sharepoint Server 2007": {
+      "BINK": ["76", "77"]
+    },
     "Identity Lifecycle Manager 2007": {
       "BINK": ["78", "79"]
     },
     "Visual Studio 2008": {
       "BINK": ["78", "79"]
     },
+    "Sharepoint Designer 2007": {
+      "BINK": ["7C", "7D"]
+    },
     "Office 2007 Applications": {
       "BINK": ["7E", "7F"]
     },
@@ -147,8 +153,8 @@
     "Office 2007 Standard / Professional / Ultimate / Enterprise": {
       "BINK": ["82", "83"]
     },
-    "Office 2007 OEM (2007 MS Office system)": {
-      "BINK": ["84"]
+    "Office 2007 Hybrid": {
+      "BINK": ["84", "85"]
     },
     "Office 2007 Home & Student": {
       "BINK": ["88", "89"]
@@ -324,15 +330,15 @@
       "a": "1",
       "b": "0",
       "g": {
-        "x": "17272533675023793624680016937607161394427776688401278127884215858369066406365237833207419170117031265147050748737186",
-        "y": "10897684556651576571671151674586120690608236542740270859915076272932083320838022698730208293779451126638581586588925"
+        "x": "2424861453756882196229359499252409442096928108454123044238107428456451053748664006504056679987776648547354283230029",
+        "y": "7324425970176151969116486392910180591819760394015255323965851504893617199075285355320677185484219270306349221725496"
       },
-      "n": "44682719955829289",
-      "p": "31123778862031392435299439090755153401162704597024288571183830527113563344679315725116915983118187065183839828632113",
-      "priv": "30177475288172038",
+      "n": "42173753096150573",
+      "p": "23576896825148261563986794905854575022252138407149635186332207102431578828005131860154350053063599250972940889198609",
+      "priv": "21644128200478272",
       "pub": {
-        "x": "10584120526089473026246191383792758367144927589909587205278073830223938861208553884400816982485323081066790399437204",
-        "y": "19710761542152200618172612283139324015316083022563473705358032993141026289202915973780473937312193485361804450068338"
+        "x": "22559965909720054111451558679234685221190121968477792217083519033370405738218408301652020048970098652944061723131120",
+        "y": "4867649293914467066273247931825593002116583959412689222356329515920397531410942846741846700237094219959206105155903"
       }
     },
     "0C": {
@@ -800,6 +806,66 @@
         "y": "4166331361209663080277908775030002767045551689443380649904104094047767422069625957190676222747168197864341871814070164924686453916110248521040648287862677"
       }
     },
+    "42": {
+      "a": "1",
+      "b": "0",
+      "g": {
+        "x": "11640071446359917693418230277272135573556102510768548148030840368465631925066661215750608051818744662399431859372010847799326485284550650513243041633181229",
+        "y": "1117219266737324272317290420713713230170128897725948728570838742460014554810962916878884036620621200355133560155042440959180864818213121429155138181344653"
+      },
+      "n": "5280334341756112909",
+      "p": "12942978066077029419384467090650680778545791198987839112733218154226202456650854446314697588718267646821306053679758777877942489272278682133825653213117273",
+      "priv": "1465309884720242143",
+      "pub": {
+        "x": "9351207863776380035890122409035060669425884047354848374635961783863142135448736359201437768670165682794001791952363648653230539557613342151297569318010149",
+        "y": "9639173047661422234418044696501057599355311018715184869788900265449733286127996011980477454425481367874466175535746037008129571512803245134460273061854442"
+      }
+    },
+    "43": {
+      "a": "1",
+      "b": "0",
+      "g": {
+        "x": "2834486376491690368456603825217677225471198398912779448345352642108764638231378782668499190157872740666167080466219457629252550710819781972327332131965258",
+        "y": "4797700757852014957418479446842892711716196864495788466729606301384034376631555735482572108714361434720650684534546885209233659101211883665277770145423350"
+      },
+      "n": "5523679238757269761",
+      "p": "6926191998299775557228051679990184107308003134668712746978570129316018332430570191924825301565850815568703875111335260944754577838427804555602564950786897",
+      "priv": "2809607843179400714",
+      "pub": {
+        "x": "5801087961280458909792080253947945286111446355062440146334723296822174085898835796467483513249817617372724731293482946799424523234786103045200852470225011",
+        "y": "1919606609989436277853545800995092035920586757555046809012910563836843544210421704301817498648513315478648381017523132165198480986231348796390852153074721"
+      }
+    },
+    "44": {
+      "a": "1",
+      "b": "0",
+      "g": {
+        "x": "9680658238923578678202657184293847763076151678383489086861167893944370179297511555508861816858010248459991161671607410772896973557285105910275482332653112",
+        "y": "38902477949345497450784597636513692713869581728781957101503157321110858542746905996206655102425053611084383171688496202957335182347019199622239575131319"
+      },
+      "n": "4714695763604443541",
+      "p": "10060218540908435736634173235406368357048589196592148828376201588591059234309957485052136941552686476146780926855972646273339825261674895471491324476121697",
+      "priv": "952494568445020851",
+      "pub": {
+        "x": "7809435572353033432542259944225681069776007713441000282689259450883474252378043956762041876078756182695744718782433033396721679522564745671507681698680124",
+        "y": "2120018000497598938986702274873490939171797105426386828711756267078880551570146718754825759969119264518218486103010877173921337418786732248062865348045969"
+      }
+    },
+    "45": {
+      "a": "1",
+      "b": "0",
+      "g": {
+        "x": "1415506028429814835609318901328901279725664469601609961018689628962980229383879276982285895935656882715108992785111554965336919510937749428526698965204901",
+        "y": "6142658768171534784725381543698447822724946469773052050322995135930968261406067031627504011235735426349765719550450476207341330596203075437382377459404055"
+      },
+      "n": "4705733954672224129",
+      "p": "8420779903875279756603065163346889837055414440294897668354571673595315405287353764209959201404596284932170027888535337670888642377481800445761115380269649",
+      "priv": "1845297747391977061",
+      "pub": {
+        "x": "5979408142886940137052651399684513359780629840102111793966097396623272737697258705143841606573133958717430112526043253582151662435203695216093728339267096",
+        "y": "3518591391911442753664238113448734968964864723243113225953452544472418473210828150121884867152997802156077007186900916060906287620287437578440526157889485"
+      }
+    },
     "50": {
       "a": "1",
       "b": "0",

src/cli.cpp

@@ -423,7 +423,7 @@ int CLI::BINK1998Generate() {
     } else {
         // generate a random number to use as a serial
         BIGNUM *bnrand = BN_new();
-        BN_rand(bnrand, 19, BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY);
+        UMSKT::umskt_bn_rand(bnrand, 19, BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY);
 
         int oRaw;
         char *cRaw = BN_bn2dec(bnrand);
@@ -484,7 +484,7 @@ int CLI::BINK2002Generate() {
     // generate a key
     for (int i = 0; i < this->total; i++) {
         DWORD pAuthInfo;
-        RAND_bytes((BYTE *)&pAuthInfo, 4);
+        UMSKT::umskt_rand_bytes((BYTE *)&pAuthInfo, 4);
         pAuthInfo &= BITMASK(10);
 
         if (this->options.verbose) {

src/libumskt/libumskt.cpp

@@ -58,3 +58,78 @@ FNEXPORT int PIDGEN2_GenerateRetail(char* channelID, char* &keyout) {
 FNEXPORT int PIDGEN2_GenerateOEM(char* year, char* day, char* oem, char* keyout) {
     return PIDGEN2::GenerateOEM(year, day, oem, keyout);
 }
+
+// RNG utility functions
+int UMSKT::umskt_rand_bytes(unsigned char *buf, int num) {
+#if UMSKT_RNG_DJGPP
+    // DOS-compatible RNG using DJGPP's random() function
+    static bool initialized = false;
+    if (!initialized) {
+        // Get initial seed from multiple sources for better entropy
+        struct timeval tv;
+        gettimeofday(&tv, NULL);
+        
+        // Combine microseconds with BIOS timer ticks
+        unsigned long ticks = *(volatile unsigned long *)0x0040001CL;
+        int seed = (int)((tv.tv_sec ^ tv.tv_usec) ^ (ticks * 100000));
+        
+        // Initialize both random() and rand() with different seeds
+        srandom(seed);
+        srand(seed ^ 0x1234ABCD); // Use a different seed for rand
+        
+        initialized = true;
+    }
+    
+    for (int i = 0; i < num; i++) {
+        // Use random() for better randomness, especially in lower bits
+        buf[i] = (unsigned char)(random() & 0xFF);
+        
+        // Mix in rand() as an additional source
+        buf[i] ^= (unsigned char)(rand() & 0xFF);
+    }
+    return 1;
+#else
+    // Use OpenSSL's RAND_bytes for non-DOS systems
+    return RAND_bytes(buf, num);
+#endif
+}
+
+int UMSKT::umskt_bn_rand(BIGNUM *rnd, int bits, int top, int bottom) {
+#if UMSKT_RNG_DJGPP
+    // DOS-compatible RNG implementation for BIGNUMs
+    unsigned char *buf = (unsigned char *)malloc((bits + 7) / 8);
+    if (!buf) return 0;
+    
+    // Generate random bytes
+    umskt_rand_bytes(buf, (bits + 7) / 8);
+    
+    // Convert to BIGNUM
+    if (!BN_bin2bn(buf, (bits + 7) / 8, rnd)) {
+        free(buf);
+        return 0;
+    }
+    
+    free(buf);
+    
+    // Apply top/bottom constraints like BN_rand does
+    if (top != -1) {
+        if (top) {
+            if (bits == 0) {
+                BN_zero(rnd);
+                return 1;
+            }
+            BN_set_bit(rnd, bits - 1);
+        }
+        BN_mask_bits(rnd, bits);
+    }
+    
+    if (bottom) {
+        BN_set_bit(rnd, 0);
+    }
+    
+    return 1;
+#else
+    // Use OpenSSL's BN_rand for non-DOS systems
+    return BN_rand(rnd, bits, top, bottom);
+#endif
+}

src/libumskt/libumskt.h

@@ -38,6 +38,10 @@
 #include <fmt/core.h>
 #include <fmt/format.h>
 
+#ifdef __DJGPP__
+#include <sys/time.h>
+#endif
+
 // Algorithm macros
 #define PK_LENGTH               25
 #define NULL_TERMINATOR         1
@@ -59,6 +63,17 @@
 #define BYDWORD(n)                     (DWORD)(*((n) + 0) | *((n) + 1) << 8 | *((n) + 2) << 16 | *((n) + 3) << 24)
 #define BITMASK(n)                     ((1ULL << (n)) - 1)
 
+// RNG utility functions
+#ifdef __DJGPP__
+#define UMSKT_RNG_DJGPP 1
+extern "C" {
+    long int random(void);
+    int srandom(int seed);
+}
+#else
+#define UMSKT_RNG_DJGPP 0
+#endif
+
 class UMSKT {
 public:
     static std::FILE* debug;
@@ -67,7 +82,10 @@ public:
     class ConfigurationID;
 
     static void setDebugOutput(std::FILE* input);
+
+    // RNG utility functions
+    static int umskt_rand_bytes(unsigned char *buf, int num);
+    static int umskt_bn_rand(BIGNUM *rnd, int bits, int top, int bottom);
 };
 
-
 #endif //UMSKT_LIBUMSKT_H

src/libumskt/pidgen3/BINK1998.cpp

@@ -201,7 +201,7 @@ void PIDGEN3::BINK1998::Generate(
         EC_POINT *r = EC_POINT_new(eCurve);
 
         // Generate a random number c consisting of 384 bits without any constraints.
-        BN_rand(c, FIELD_BITS, BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY);
+        UMSKT::umskt_bn_rand(c, FIELD_BITS, BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY);
 
         // Pick a random derivative of the base point on the elliptic curve.
         // R = cG;

src/libumskt/pidgen3/BINK2002.cpp

@@ -236,7 +236,7 @@ void PIDGEN3::BINK2002::Generate(
         EC_POINT *r = EC_POINT_new(eCurve);
 
         // Generate a random number c consisting of 512 bits without any constraints.
-        BN_rand(c, FIELD_BITS_2003, BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY);
+        UMSKT::umskt_bn_rand(c, FIELD_BITS_2003, BN_RAND_TOP_ANY, BN_RAND_BOTTOM_ANY);
 
         // R = cG
         EC_POINT_mul(eCurve, r, nullptr, basePoint, c, numContext);