Unicode C

PBKDF2 - Derive Key from Password

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Demonstrates how to derive a symmetric encryption key from a password using PBKDF2. Unicode C

#include <C_CkCrypt2W.h>

void ChilkatSample(void)
    {
    HCkCrypt2W crypt;
    const wchar_t *pw;
    const wchar_t *pwCharset;
    const wchar_t *hashAlg;
    const wchar_t *saltHex;
    int iterationCount;
    int outputBitLen;
    const wchar_t *enc;
    const wchar_t *hexKey;

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

    crypt = CkCrypt2W_Create();

    pw = L"password";

    pwCharset = L"utf-8";

    // Such as sha256, sha512
    hashAlg = L"sha256";

    // 16 bytes
    saltHex = L"78578E5A5D63CB0668AB39B21C8637FA";

    iterationCount = 100000;

    // Derive a 256-bit key from the password.
    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.)
    enc = L"hex";

    hexKey = CkCrypt2W_pbkdf2(crypt,pw,pwCharset,hashAlg,saltHex,iterationCount,outputBitLen,enc);

    wprintf(L"%s\n",hexKey);

    // Sample output:
    // AE96E261E32792D0FD6F0E72F8E872D046F7DB4C1FA7C83892EC73C49F461B70


    CkCrypt2W_Dispose(crypt);

    }