Match Java JCE AES CBC Encryption Results

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Shows sample code in C++ that matches Java JCE encryption results for 128-bit AES encryption using CBC mode. The equivalent Java JCE code is provided as commented-out code following the C++ code.

#include <CkCrypt2.h>
#include <CkString.h>

void ChilkatSample(void)
    {
    CkCrypt2 crypt;

    // Any string argument automatically begins the 30-day trial.
    bool success;
    success = crypt.UnlockComponent("30-day trial");
    if (success != true) {
        printf("Crypt component unlock failed\n");
        return;
    }

    CkString password;
    password = "secretPassphrase";

    // Use the Digest MD5 algorithm to get a 16-byte binary secret key.
    crypt.put_HashAlgorithm("md5");
    crypt.put_EncodingMode("hex");
    CkString secretKeyHex;
    secretKeyHex = crypt.hashStringENC(password);

    crypt.put_CryptAlgorithm("aes");
    crypt.put_CipherMode("cbc");
    crypt.put_KeyLength(128);
    crypt.SetEncodedKey(secretKeyHex,"hex");
    crypt.SetEncodedIV(secretKeyHex,"hex");

    CkString text;
    text = "Though this be madness, yet there is method in 't";
    CkString encText;
    encText = crypt.encryptStringENC(text);

    // Displays:
    // 79c357db030ac9ae66a84528a2f387717c5f10b48ef4385e5fe7b9227b3eeb8a
    // 77f24900890e72e35758b1f79f8f78d51ebe94536c30c57fd7b2c17b927715d7

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

    // 
    // This is the equivalent code using Java JCE:
    // 
    // String password = "secretPassphrase";
    // 
    // MessageDigest md = MessageDigest.getInstance("MD5");
    // md.update(password.getBytes("UTF-8"), 0, password.length());
    // byte[] rawKey = md.digest();
    // String text = "Though this be madness, yet there is method in 't";
    // 
    // SecretKeySpec skeySpec = new SecretKeySpec(rawKey, "AES");
    // IvParameterSpec ivSpec = new IvParameterSpec(rawKey);
    // 
    // Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    // cipher.init(Cipher.ENCRYPT_MODE, skeySpec, ivSpec);
    // 
    // byte[] encrypted = cipher.doFinal(text.getBytes("UTF-8"));
    // 
    // System.out.println(toHex(encrypted));

    // This is the toHex method in Java:
    // public static String toHex (byte buf[]) {
    // 
    // StringBuffer strbuf = new StringBuffer(buf.length * 2);
    // int i;
    // 
    // for (i = 0; i < buf.length; i++) {
    // if (((int) buf[i] & 0xff) < 0x10)
    // strbuf.append("0");
    // 
    // strbuf.append(Long.toString((int) buf[i] & 0xff, 16));
    // }
    // 
    // return strbuf.toString();
    // }

    }