Package java.security

Examples of java.security.SecureRandom.nextInt()

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                perms[9] = 'a';
                perms[10] = 'd';
                perms[11] = 'b';
                for (int i = 12; i <= 15; i++)
                {
                    perms[i] = (byte)rnd.nextInt();
                }
               
                cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptionKey, "AES"),
                        new IvParameterSpec(new byte[16]));
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    protected String createSecKey() {
        SecureRandom random = new SecureRandom();
        byte[] data = new byte[16];
        for (int i = 0; i < 4; ++i) {
            int val = random.nextInt();
            data[i * 4] = (byte) val;
            data[i * 4 + 1] = (byte) ((val >> 8) & 0xFF);
            data[i * 4 + 2] = (byte) ((val >> 16) & 0xFF);
            data[i * 4 + 3] = (byte) ((val >> 24) & 0xFF);
        }
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            //This is a lengthy operation, to be done only upon
            //initialization of the application
            SecureRandom prng = SecureRandom.getInstance("SHA1PRNG");

            //generate a random number
            String randomNum = new Integer(prng.nextInt()).toString();

            //get its digest
            MessageDigest sha = MessageDigest.getInstance("SHA-1");
            byte[] result = sha.digest(randomNum.getBytes());
            return hexEncode(result);
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            case HASH_METHOD_CRYPT:
                if ( salt == null )
                {
                    salt = new byte[2];
                    SecureRandom sr = new SecureRandom();
                    int i1 = sr.nextInt( 64 );
                    int i2 = sr.nextInt( 64 );

                    salt[0] = ( byte ) ( i1 < 12 ? ( i1 + '.' ) : i1 < 38 ? ( i1 + 'A' - 12 ) : ( i1 + 'a' - 38 ) );
                    salt[1] = ( byte ) ( i2 < 12 ? ( i2 + '.' ) : i2 < 38 ? ( i2 + 'A' - 12 ) : ( i2 + 'a' - 38 ) );
                }
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                if ( salt == null )
                {
                    salt = new byte[2];
                    SecureRandom sr = new SecureRandom();
                    int i1 = sr.nextInt( 64 );
                    int i2 = sr.nextInt( 64 );

                    salt[0] = ( byte ) ( i1 < 12 ? ( i1 + '.' ) : i1 < 38 ? ( i1 + 'A' - 12 ) : ( i1 + 'a' - 38 ) );
                    salt[1] = ( byte ) ( i2 < 12 ? ( i2 + '.' ) : i2 < 38 ? ( i2 + 'A' - 12 ) : ( i2 + 'a' - 38 ) );
                }
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        if (boundary == null) {
            StringBuilder b = new StringBuilder();
            Random random = new SecureRandom();
           
            for (int i = 0; i < 16; i++) {
                b.append(BOUNDARY_CHARACTERS[random.nextInt(BOUNDARY_CHARACTERS.length)]);
            }
            boundary = String.format("----ClientFormBoundary%s", b.toString());
        }
        return boundary;
    }
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     * @return the random long value
     */
    public static int secureRandomInt(int lowerThan) {
        SecureRandom sr = getSecureRandom();
        synchronized (sr) {
            return sr.nextInt(lowerThan);
        }
    }

}
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        }
        else if ( HASH_METHOD_CRYPT.equalsIgnoreCase( hashMethod ) )
        {
            this.salt = new byte[2];
            SecureRandom sr = new SecureRandom();
            int i1 = sr.nextInt( 64 );
            int i2 = sr.nextInt( 64 );
            this.salt[0] = ( byte ) ( i1 < 12 ? ( i1 + '.' ) : i1 < 38 ? ( i1 + 'A' - 12 ) : ( i1 + 'a' - 38 ) );
            this.salt[1] = ( byte ) ( i2 < 12 ? ( i2 + '.' ) : i2 < 38 ? ( i2 + 'A' - 12 ) : ( i2 + 'a' - 38 ) );
        }
        else
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        else if ( HASH_METHOD_CRYPT.equalsIgnoreCase( hashMethod ) )
        {
            this.salt = new byte[2];
            SecureRandom sr = new SecureRandom();
            int i1 = sr.nextInt( 64 );
            int i2 = sr.nextInt( 64 );
            this.salt[0] = ( byte ) ( i1 < 12 ? ( i1 + '.' ) : i1 < 38 ? ( i1 + 'A' - 12 ) : ( i1 + 'a' - 38 ) );
            this.salt[1] = ( byte ) ( i2 < 12 ? ( i2 + '.' ) : i2 < 38 ? ( i2 + 'A' - 12 ) : ( i2 + 'a' - 38 ) );
        }
        else
        {
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    protected String createSecKey() {
        SecureRandom random = new SecureRandom();
        byte[] data = new byte[16];
        for (int i = 0; i < 4; ++i) {
            int val = random.nextInt();
            data[i * 4] = (byte) val;
            data[i * 4 + 1] = (byte) ((val >> 8) & 0xFF);
            data[i * 4 + 2] = (byte) ((val >> 16) & 0xFF);
            data[i * 4 + 3] = (byte) ((val >> 24) & 0xFF);
        }
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