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org/apache/http/impl/auth/NTLMEngineImpl.java

lmHash(String)

class NTLMEngineImpl {
    /**
     * Creates the LM Hash of the user's password.
     *
     * @param password
     *            The password.
     *
     * @return The LM Hash of the given password, used in the calculation of the
     *         LM Response.
     */
    private static byte[] lmHash(String password) throws NTLMEngineException {
        try {
            byte[] oemPassword = password.toUpperCase().getBytes("US-ASCII");
            int length = Math.min(oemPassword.length, 14);
            byte[] keyBytes = new byte[14];
            System.arraycopy(oemPassword, 0, keyBytes, 0, length);
            Key lowKey = createDESKey(keyBytes, 0);
            Key highKey = createDESKey(keyBytes, 7);
            byte[] magicConstant = "KGS!@#$%".getBytes("US-ASCII");
            Cipher des = Cipher.getInstance("DES/ECB/NoPadding");
            des.init(Cipher.ENCRYPT_MODE, lowKey);
            byte[] lowHash = des.doFinal(magicConstant);
            des.init(Cipher.ENCRYPT_MODE, highKey);
            byte[] highHash = des.doFinal(magicConstant);
            byte[] lmHash = new byte[16];
            System.arraycopy(lowHash, 0, lmHash, 0, 8);
            System.arraycopy(highHash, 0, lmHash, 8, 8);
            return lmHash;
        } catch (Exception e) {
            throw new NTLMEngineException(e.getMessage(), e);
        }
    }

}