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(Unicode C) AES CFB Mode EncryptionDemonstrates how to encrypt using AES CFB (Cipher Feedback) mode.
#include <C_CkCrypt2W.h> void ChilkatSample(void) { HCkCrypt2W crypt; const wchar_t *ivHex; const wchar_t *keyHex; const wchar_t *encStr; HCkCrypt2W decrypt; const wchar_t *decStr; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. crypt = CkCrypt2W_Create(); CkCrypt2W_putCryptAlgorithm(crypt,L"aes"); CkCrypt2W_putCipherMode(crypt,L"cfb"); CkCrypt2W_putKeyLength(crypt,256); // EncodingMode specifies the encoding of the output for // encryption, and the input for decryption. // It may be "hex", "url", "base64", "quoted-printable", or many other choices. CkCrypt2W_putEncodingMode(crypt,L"hex"); ivHex = L"000102030405060708090A0B0C0D0E0F"; CkCrypt2W_SetEncodedIV(crypt,ivHex,L"hex"); // The secret key must equal the size of the key. For // 256-bit encryption, the binary secret key is 32 bytes. keyHex = L"603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4"; CkCrypt2W_SetEncodedKey(crypt,keyHex,L"hex"); // Encrypt a string... encStr = CkCrypt2W_encryptStringENC(crypt,L"Good night, good night! parting is such sweet sorrow, That I shall say good night till it be morrow. -- William Shakespeare"); wprintf(L"%s\n",encStr); decrypt = CkCrypt2W_Create(); CkCrypt2W_putCryptAlgorithm(decrypt,L"aes"); CkCrypt2W_putCipherMode(decrypt,L"cfb"); CkCrypt2W_putKeyLength(decrypt,256); CkCrypt2W_putEncodingMode(decrypt,L"hex"); CkCrypt2W_SetEncodedIV(decrypt,ivHex,L"hex"); CkCrypt2W_SetEncodedKey(decrypt,keyHex,L"hex"); // Now decrypt: decStr = CkCrypt2W_decryptStringENC(decrypt,encStr); wprintf(L"%s\n",decStr); CkCrypt2W_Dispose(crypt); CkCrypt2W_Dispose(decrypt); } |
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