Java PBKDF2 method + string wrapper, relies on some external methods for converting to hex strings.

pbkdf2.java

public String hashPassword(String password, String salt) throws Exception
/*
 * Wrap pbkdf2 method to return password hash as a hex string
*/
{
	// Bail if password or salt are null/0 length
	if ((null == password || 0 == password.length()) || (null == salt || 0 == salt.length()))
		throw new Exception("Failed to create PBKDF2 Hash for password, password or salt can not be empty");

	// Result string
	String hash = null;

	hash = convertBytesToHexString(pbkdf2(password, salt));

	// Ensure that the hashing didn't fail
	if (null != hash && hash.length() > 0)
		return hash;
	else
		throw new Exception("Failed to create PBKDF2 Hash for password");
}

public byte[] pbkdf2(String password, String salt) throws Exception
{
	// Bail if password or salt are null/0 length
	if ((null == password || 0 == password.length()) || (null == salt || 0 == salt.length())) return null;

	// Convert password and salt to character array/byte array
	char[] password_char = password.toCharArray();
	byte[] salt_bytes = salt.getBytes();

	// Define number of iterations and output size
	int iterations = 5000;
	int result_size = 256;

	// The result - null if any failure
	byte[] pbkdf2_result = null;

	try {
		SecretKeyFactory skf = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");

		// PBEKeySpec(char[] password, byte[] salt, int iterationCount, int keyLength) 
		PBEKeySpec ks = new PBEKeySpec(password_char, salt_bytes, iterations, result_size);

		// Generate the password hash
		SecretKey s = skf.generateSecret(ks);

		// Immediately zero the password from memory
		ks.clearPassword();

		// Get the resulting byte array of our PBKDF2 hash
		pbkdf2_result = s.getEncoded();
	}
	catch (Exception e)
	{
		throw e;
	}

	return pbkdf2_result;
}