/**
* Creates the LM Hash of the user's password.
*
* @param password The password.
* @return The LM Hash of the given password
*/
public static String lmHash(final String password) throws Exception {
final byte[] oemPassword = password.toUpperCase().getBytes("US-ASCII");
final int length = Math.min(oemPassword.length, 14);
final byte[] keyBytes = new byte[14];
System.arraycopy(oemPassword, 0, keyBytes, 0, length);
final Key lowKey = SMBHash.createDESKey(keyBytes, 0);
final Key highKey = SMBHash.createDESKey(keyBytes, 7);
final byte[] magicConstant = "KGS!@#$%".getBytes("US-ASCII");
final Cipher des = Cipher.getInstance("DES/ECB/NoPadding");
des.init(Cipher.ENCRYPT_MODE, lowKey);
final byte[] lowHash = des.doFinal(magicConstant);
des.init(Cipher.ENCRYPT_MODE, highKey);
final byte[] highHash = des.doFinal(magicConstant);
final byte[] lmHash = new byte[16];
System.arraycopy(lowHash, 0, lmHash, 0, 8);
System.arraycopy(highHash, 0, lmHash, 8, 8);
return SMBHash.toHexString(lmHash);
}
/**
* Creates a DES encryption key from the given key material.
*
* @param bytes A byte array containing the DES key material.
* @param offset The offset in the given byte array at which the 7-byte key material starts.
* @return A DES encryption key created from the key material starting at the specified offset in
* the given byte array.
*/
private static Key createDESKey(final byte[] bytes, final int offset) {
final byte[] keyBytes = new byte[7];
System.arraycopy(bytes, offset, keyBytes, 0, 7);
final byte[] material = new byte[8];
material[0] = keyBytes[0];
material[1] = (byte) (keyBytes[0] << 7 | (keyBytes[1] & 0xff) >>> 1);
material[2] = (byte) (keyBytes[1] << 6 | (keyBytes[2] & 0xff) >>> 2);
material[3] = (byte) (keyBytes[2] << 5 | (keyBytes[3] & 0xff) >>> 3);
material[4] = (byte) (keyBytes[3] << 4 | (keyBytes[4] & 0xff) >>> 4);
material[5] = (byte) (keyBytes[4] << 3 | (keyBytes[5] & 0xff) >>> 5);
material[6] = (byte) (keyBytes[5] << 2 | (keyBytes[6] & 0xff) >>> 6);
material[7] = (byte) (keyBytes[6] << 1);
SMBHash.oddParity(material);
return new SecretKeySpec(material, "DES");
}
/**
* Creates the NTLM Hash of the user's password.
*
* @param password The password.
* @return The NTLM Hash of the given password.
*/
public static String ntlmHash(final String password) throws Exception {
final byte[] unicodePassword = password.getBytes("UnicodeLittleUnmarked");
final MessageDigest md4 = MessageDigest.getInstance("MD4");
return SMBHash.toHexString(md4.digest(unicodePassword));
}
