(C++) PBKDF2 Key Derivation

Demonstrates AES secret key derivation from a password using PBDKF2.

For more information, see https://www.chilkatsoft.com/key_derivation_pbkdf2.asp

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#include <CkCrypt2.h>

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

    CkCrypt2 crypt;

    const char *password = "correcthorsebatterystaple";

    // Derive from the utf-8 byte representation of the password.
    const char *charset = "utf-8";

    const char *hashAlg = "sha256";

    crypt.put_EncodingMode("hex");
    const char *saltHex = crypt.genRandomBytesENC(16);

    int iterationCount = 310000;

    // Derive a 256-bit key from the password.
    int outputBitLen = 256;

    // The derived key is returned as a hex or base64 encoded string.
    // (Note: The salt argument must be a string that also uses
    // the same encoding.)
    const char *enc = "hex";

    const char *hexKey = crypt.pbkdf2(password,charset,hashAlg,saltHex,iterationCount,outputBitLen,enc);

    std::cout << hexKey << "\r\n";

    // Sample output:
    // 597734C894FF89CFD3B93D925462C24E97724BCB118F6FC919007F5ABC27E768
    }