HMACSHA256^ hmacsha256 = gcnew HMACSHA256( key ) Decode the encoded file and compare to original file.īool DecodeFile( array^key, String^ sourceFile ) OutStream->Write( buffer, 0, bytesRead ) Copy the contents of the sourceFile to the destFile.īytesRead = inStream->Read( buffer, 0, 1024 ) OutStream->Write( hashValue, 0, hashValue->Length ) Write the computed hash value to the output file. Reset inStream to the beginning of the file. HMACSHA256^ myhmacsha256 = gcnew HMACSHA256( key ) įileStream^ inStream = gcnew FileStream( sourceFile,FileMode::Open ) įileStream^ outStream = gcnew FileStream( destFile,FileMode::Create ) Īrray^hashValue = myhmacsha256->ComputeHash( inStream ) Void EncodeFile( array^key, String^ sourceFile, String^ destFile ) prepended to the contents of the source file, then decodes the file and compares Computes a keyed hash for a source file, creates a target file with the keyed hash Using namespace System::Security::Cryptography The following example shows how to sign a file by using the HMACSHA256 object and then how to verify the file. UnsupportedOSPlatformAttribute ComVisibleAttribute Examples
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