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(Unicode C) RC2 Encryption and DecryptionRC2 encryption. The Chilkat encryption component supports RC2 encryption in both ECB (Electronic Cookbook) and CBC (Cipher-Block Chaining) modes. The key size may range from 8 bits to 1024 bits.
#include <C_CkCrypt2W.h> void ChilkatSample(void) { HCkCrypt2W crypt; const wchar_t *ivHex; const wchar_t *keyHex; const wchar_t *encStr; const wchar_t *decStr; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. crypt = CkCrypt2W_Create(); // Set the encryption algorithm = "rc2" CkCrypt2W_putCryptAlgorithm(crypt,L"rc2"); // CipherMode may be "ecb" or "cbc" CkCrypt2W_putCipherMode(crypt,L"cbc"); // KeyLength may range from 8 bits to 1024 bits CkCrypt2W_putKeyLength(crypt,128); // RC2 also has an effective key length property // which can also range from 8 bits to 1024 bits: CkCrypt2W_putRc2EffectiveKeyLength(crypt,128); // The padding scheme determines the contents of the bytes // that are added to pad the result to a multiple of the // encryption algorithm's block size. RC2 has a block // size of 8 bytes, so encrypted output is always // a multiple of 8. CkCrypt2W_putPaddingScheme(crypt,0); // EncodingMode specifies the encoding of the output for // encryption, and the input for decryption. // It may be "hex", "url", "base64", or "quoted-printable". CkCrypt2W_putEncodingMode(crypt,L"hex"); // An initialization vector is required if using CBC mode. // ECB mode does not use an IV. // The length of the IV is equal to the algorithm's block size. // It is NOT equal to the length of the key. ivHex = L"0001020304050607"; CkCrypt2W_SetEncodedIV(crypt,ivHex,L"hex"); // The secret key must equal the size of the key. // For 128-bit encryption, the binary secret key is 16 bytes. keyHex = L"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F"; CkCrypt2W_SetEncodedKey(crypt,keyHex,L"hex"); // Encrypt a string... // The input string is 44 ANSI characters (i.e. 44 bytes), so // the output should be 48 bytes (a multiple of 8). // Because the output is a hex string, it should // be 96 characters long (2 chars per byte). encStr = CkCrypt2W_encryptStringENC(crypt,L"The quick brown fox jumps over the lazy dog."); wprintf(L"%s\n",encStr); // Now decrypt: decStr = CkCrypt2W_decryptStringENC(crypt,encStr); wprintf(L"%s\n",decStr); CkCrypt2W_Dispose(crypt); } |
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