Java String Encrypt encrypt(String str)

Description

Encrypt the given string in a way which anybody having access to this method algorithm can easily decrypt.

License

Open Source License

Parameter

Parameter	Description
str	the string to encrypt

Return

the encrypted version of the string

Declaration

public final static String encrypt(String str) 

Method Source Code

//package com.java2s;
/*/*w ww  . j a  v a2s.  c  om*/
 * This file is subject to the license found in LICENCE.TXT in the root directory of the project.
 * 
 * version 1.4
 */

public class Main {
    /** Array contain char conversion data */
    private final static char[] SHIFTS = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
            21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 114, 120, 53, 79, 96, 109, 72, 108, 70, 64, 76, 67, 116, 74,
            68, 87, 111, 52, 75, 119, 49, 34, 82, 81, 95, 65, 112, 86, 118, 110, 122, 105, 41, 57, 83, 43, 46, 102,
            40, 89, 38, 103, 45, 50, 42, 123, 91, 35, 125, 55, 54, 66, 124, 126, 59, 47, 92, 71, 115, 78, 88, 107,
            106, 56, 36, 121, 117, 104, 101, 100, 69, 73, 99, 63, 94, 93, 39, 37, 61, 48, 58, 113, 32, 90, 44, 98,
            60, 51, 33, 97, 62, 77, 84, 80, 85, 223, 225, 216, 187, 166, 229, 189, 222, 188, 141, 249, 148, 200,
            184, 136, 248, 190, 199, 170, 181, 204, 138, 232, 218, 183, 255, 234, 220, 247, 213, 203, 226, 193, 174,
            172, 228, 252, 217, 201, 131, 230, 197, 211, 145, 238, 161, 179, 160, 212, 207, 221, 254, 173, 202, 146,
            224, 151, 140, 196, 205, 130, 135, 133, 143, 246, 192, 159, 244, 239, 185, 168, 215, 144, 139, 165, 180,
            157, 147, 186, 214, 176, 227, 231, 219, 169, 175, 156, 206, 198, 129, 164, 150, 210, 154, 177, 134, 127,
            182, 128, 158, 208, 162, 132, 167, 209, 149, 241, 153, 251, 237, 236, 171, 195, 243, 233, 253, 240, 194,
            250, 191, 155, 142, 137, 245, 235, 163, 242, 178, 152 };

    /**
     * Encrypt the given string in a way which anybody having access to this method
     * algorithm can easily decrypt.
     * 
     * This is useful only to avoid clear string storage in a file for example,
     * but shouldn't be considered as a real mean of security.
     * 
     * This only works with simple characters (char < 256).
     * @param str the string to encrypt
     * @return the encrypted version of the string
     */
    public final static String encrypt(String str) {
        if (str == null) {
            return null;
        }
        StringBuffer buf = new StringBuffer();
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            if (c >= SHIFTS.length) {
                throw new IllegalArgumentException(
                        "encrypt method can only be used with simple characters. '" + c + "' not allowed");
            }
            buf.append(SHIFTS[c]);
        }
        return buf.toString();
    }
}

Related

1. encrypt(String data, String key)
2. encrypt(String inStr)
3. encrypt(String s)
4. encrypt(String s)
5. Encrypt(String str)
6. Encrypt(String str, String salt)
7. encrypt(String string)
8. encrypt(String string)
9. encrypt0(final byte[] result)