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Unicode C++ Examples

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(Unicode C++) Blowfish OFB Output Feedback Mode Encryption

Demonstrates how to encrypt using Blowfish OFB (Output Feedback) mode.

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#include <CkCrypt2W.h>

void ChilkatSample(void)
    {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkCrypt2W crypt;

    // Use "blowfish2" to produce correct results that match published blowfish test vectors.
    crypt.put_CryptAlgorithm(L"blowfish2");
    // Set the cipher mode to Output Feedback
    crypt.put_CipherMode(L"ofb");
    crypt.put_KeyLength(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.
    crypt.put_EncodingMode(L"hex");

    // The block size of the blowfish algoirthm is 8 bytes, therefore the IV is 8 bytes.
    const wchar_t *ivHex = L"0001020304050607";
    crypt.SetEncodedIV(ivHex,L"hex");

    // The secret key must equal the size of the key.  For
    // 256-bit encryption, the binary secret key is 32 bytes.
    const wchar_t *keyHex = L"603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4";
    crypt.SetEncodedKey(keyHex,L"hex");

    // Encrypt a string...
    const wchar_t *encStr = crypt.encryptStringENC(L"Emergencies have always been the pretext on which the safeguards of individual liberty have been eroded. -- Friedrich Hayek");
    wprintf(L"%s\n",encStr);

    CkCrypt2W decrypt;
    decrypt.put_CryptAlgorithm(L"blowfish2");
    decrypt.put_CipherMode(L"ofb");
    decrypt.put_KeyLength(256);
    decrypt.put_EncodingMode(L"hex");
    decrypt.SetEncodedIV(ivHex,L"hex");
    decrypt.SetEncodedKey(keyHex,L"hex");

    // Now decrypt:
    const wchar_t *decStr = decrypt.decryptStringENC(encStr);
    wprintf(L"%s\n",decStr);
    }

 

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