(C) PBKDF2 - Derive Key from Password

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

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

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#include <C_CkCrypt2.h>

void ChilkatSample(void)
    {
    HCkCrypt2 crypt;
    const char *pw;
    const char *pwCharset;
    const char *hashAlg;
    const char *saltHex;
    int iterationCount;
    int outputBitLen;
    const char *enc;
    const char *hexKey;

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

    crypt = CkCrypt2_Create();

    pw = "password";

    pwCharset = "utf-8";

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

    // 16 bytes
    saltHex = "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 = "hex";

    hexKey = CkCrypt2_pbkdf2(crypt,pw,pwCharset,hashAlg,saltHex,iterationCount,outputBitLen,enc);

    printf("%s\n",hexKey);

    // Sample output:
    // AE96E261E32792D0FD6F0E72F8E872D046F7DB4C1FA7C83892EC73C49F461B70


    CkCrypt2_Dispose(crypt);

    }