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1Encrypt/Decrypt error on Mac OS
2public static String encrypt( String content, String password ) throws NoSuchAlgorithmException,
3    NoSuchPaddingException, UnsupportedEncodingException, InvalidKeyException, IllegalBlockSizeException,
4    BadPaddingException
5{
6    KeyGenerator kgen = KeyGenerator.getInstance( "AES" );
7    kgen.init( 128, new SecureRandom( password.getBytes() ) );
8    SecretKey secretKey = kgen.generateKey();
9    byte[] enCodeFormat = secretKey.getEncoded();
10    SecretKeySpec key = new SecretKeySpec( enCodeFormat, "AES" );
11    Cipher cipher = Cipher.getInstance( "AES" );
12    byte[] byteContent = content.getBytes( "utf-8" );
13    cipher.init( Cipher.ENCRYPT_MODE, key );
14    byte[] result = cipher.doFinal( byteContent );
15    return parseByte2HexStr( result );
16}
17
18
19public static String decrypt( String contents, String password ) throws NoSuchAlgorithmException,
20    NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException
21{
22    byte[] content = parseHexStr2Byte( contents );
23    KeyGenerator kgen = KeyGenerator.getInstance( "AES" );
24    kgen.init( 128, new SecureRandom( password.getBytes() ) );
25    SecretKey secretKey = kgen.generateKey();
26    byte[] enCodeFormat = secretKey.getEncoded();
27    SecretKeySpec key = new SecretKeySpec( enCodeFormat, "AES" );
28    Cipher cipher = Cipher.getInstance( "AES" );  
29    cipher.init( Cipher.DECRYPT_MODE, key );
30    byte[] result = cipher.doFinal( content );
31    return new String( result ); 
32}
33
34
35public static String parseByte2HexStr( byte buf[] )
36{
37    StringBuffer sb = new StringBuffer();
38    for( int i = 0; i < buf.length; i++ )
39    {
40        String hex = Integer.toHexString( buf[i] & 0xFF );
41        if( hex.length() == 1 )
42        {
43            hex = '0' + hex;
44        }
45        sb.append( hex.toUpperCase() );
46    }
47    return sb.toString();
48}
49
50
51public static byte[] parseHexStr2Byte( String hexStr )
52{
53    if( hexStr.length() < 1 )
54        return null;
55    byte[] result = new byte[ hexStr.length() / 2 ];
56    for( int i = 0; i < hexStr.length() / 2; i++ )
57    {
58        int high = Integer.parseInt( hexStr.substring( i * 2, i * 2 + 1 ), 16 );
59        int low = Integer.parseInt( hexStr.substring( i * 2 + 1, i * 2 + 2 ), 16 );
60        result[i] = ( byte ) ( high * 16 + low );
61    }
62    return result;
63}