Chilkat HOME .NET Core C# Android™ AutoIt C C# C++ Chilkat2-Python CkPython Classic ASP DataFlex Delphi ActiveX Delphi DLL Go Java Lianja Mono C# Node.js Objective-C PHP ActiveX PHP Extension Perl PowerBuilder PowerShell PureBasic Ruby SQL Server Swift 2 Swift 3,4,5... Tcl Unicode C Unicode C++ VB.NET VBScript Visual Basic 6.0 Visual FoxPro Xojo Plugin
(Unicode C) AES XTS ModeDemonstrates the AES-XTS mode of operation. Note: This example requires Chilkat v9.5.0.91 or greater.
#include <C_CkBinDataW.h> #include <C_CkCrypt2W.h> void ChilkatSample(void) { BOOL success; const wchar_t *key; const wchar_t *tweakKey; const wchar_t *dataUnit; HCkBinDataW bd; HCkCrypt2W crypt; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Here we have a sample from CAVS validatition data: // COUNT = 301 // DataUnitLen = 200 // Key = // 394c97881abd989d29c703e48a72b397 // a7acf51b59649eeea9b33274d8541df4 // i = 4b15c684a152d485fe9937d39b168c29 // PT = 2f3b9dcfbae729583b1d1ffdd16bb6fe2757329435662a78f0 // CT = f3473802e38a3ffef4d4fb8e6aa266ebde553a64528a06463e // Note: The above sample requires an AES-XTS implementation that fully supports ciphertext-stealing // because the data to be encrypted is not an even multiple of the AES block size (i.e. not a multiple of 16 bytes). // Chilkat fully supports AES-XTS with ciphertext stealing. // (i.e. Chilkat implements XEX-based tweaked-codebook mode with ciphertext stealing (XTS)) key = L"394c97881abd989d29c703e48a72b397"; tweakKey = L"a7acf51b59649eeea9b33274d8541df4"; dataUnit = L"4b15c684a152d485fe9937d39b168c29"; bd = CkBinDataW_Create(); CkBinDataW_AppendEncoded(bd,L"2f3b9dcfbae729583b1d1ffdd16bb6fe2757329435662a78f0",L"hex"); crypt = CkCrypt2W_Create(); CkCrypt2W_putCryptAlgorithm(crypt,L"aes"); CkCrypt2W_putCipherMode(crypt,L"xts"); CkCrypt2W_putKeyLength(crypt,128); CkCrypt2W_SetEncodedKey(crypt,key,L"hex"); CkCrypt2W_XtsSetEncodedTweakKey(crypt,tweakKey,L"hex"); CkCrypt2W_XtsSetEncodedTweakValue(crypt,dataUnit,L"hex"); // In-place encrypt the contents of bd. success = CkCrypt2W_EncryptBd(crypt,bd); wprintf(L"CT = %s\n",CkBinDataW_getEncoded(bd,L"hexlower")); // Decrypt to revert back to the unencrypted content: success = CkCrypt2W_DecryptBd(crypt,bd); wprintf(L"PT = %s\n",CkBinDataW_getEncoded(bd,L"hexlower")); // Output: // CT = f3473802e38a3ffef4d4fb8e6aa266ebde553a64528a06463e // PT = 2f3b9dcfbae729583b1d1ffdd16bb6fe2757329435662a78f0 CkBinDataW_Dispose(bd); CkCrypt2W_Dispose(crypt); } |
© 2000-2024 Chilkat Software, Inc. All Rights Reserved.