01.public class EncryptUtils {
02. public static final String DEFAULT_ENCODING="UTF-8";
03. static BASE64Encoder enc=new BASE64Encoder();
04. static BASE64Decoder dec=new BASE64Decoder();
05.
06. public static String base64encode(String text){
07. try {
08. String rez = enc.encode( text.getBytes( DEFAULT_ENCODING ) );
09. return rez;
10. }
11. catch ( UnsupportedEncodingException e ) {
12. return null;
13. }
14. }
15.
16. public static String base64decode(String text){
17.
18. try {
19. return new String(dec.decodeBuffer( text ),DEFAULT_ENCODING);
20. }
21. catch ( IOException e ) {
22. return null;
23. }
24.
25. }
26.
27. public static void main(String[] args){
28. String txt="some text to be encrypted" ;
29. String key="key phrase used for XOR-ing";
30. System.out.println(txt+" XOR-ed to: "+(txt=xorMessage( txt, key )));
31. String encoded=base64encode( txt );
32. System.out.println( " is encoded to: "+encoded+" and that is decoding to: "+ (txt=base64decode( encoded )));
33. System.out.print( "XOR-ing back to original: "+xorMessage( txt, key ) );
34.
35. }
36.
37. public static String xorMessage(String message, String key){
38. try {
39. if (message==null || key==null ) return null;
40.
41. char[] keys=key.toCharArray();
42. char[] mesg=message.toCharArray();
43.
44. int ml=mesg.length;
45. int kl=keys.length;
46. char[] newmsg=new char[ml];
47.
48. for (int i=0; i<ml; i++){
49. newmsg[i]=(char)(mesg[i]^keys[i%kl]);
50. }
51. mesg=null; keys=null;
52. return new String(newmsg);
53. }
54. catch ( Exception e ) {
55. return null;
56. }
57. }
58.
59.}
