(C) PBKDF1 - Derive Key from Password

Demonstrates how to derive a symmetric encryption key from a password using PBKDF1. This example matches the results found at this URL: http://www.di-mgt.com.au/cryptoKDFs.html#examplespbkdf

It also matches the output produced by the .NET Framework using this C# code:

            byte[] salt = new byte[] { 0x78, 0x57, 0x8E, 0x5A, 0x5D, 0x63, 0xCB, 0x06 };
            PasswordDeriveBytes cdk = new PasswordDeriveBytes("password", salt);

            cdk.IterationCount = 1000;
            cdk.HashName = "SHA1";

            // generate a 16-byte key
            byte[] key = cdk.GetBytes(16);

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#include <C_CkCrypt2.h>

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

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

    crypt = CkCrypt2_Create();

    // http://www.di-mgt.com.au/cryptoKDFs.html#examplespbkdf

    pw = "password";
    pwCharset = "ansi";
    // Hash algorithms may be: sha1, md2, md5, etc.
    hashAlg = "sha1";
    // The salt should be 8 bytes:
    saltHex = "78578E5A5D63CB06";
    iterationCount = 1000;
    // Derive a 128-bit key from the password.
    outputBitLen = 128;

    // 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_pbkdf1(crypt,pw,pwCharset,hashAlg,saltHex,iterationCount,outputBitLen,enc);

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

    // The output should have this value:
    // DC19847E05C64D2FAF10EBFB4A3D2A2


    CkCrypt2_Dispose(crypt);

    }