I updated Hasher today. The plugin still functions the same, but I fixed a bug in the hash generation algorithm (thanks to Vladimir Kozlov for pointing the bug out to me). I also greatly increased modularity which in turn reduced the code size rather significantly. Here is how I calculate the hash of a file (the String parameter algorithm can be any algorithm listed at http://java.sun.com/javase/6/docs/technotes/guides/security/StandardNames.html#MessageDigest):
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 32 33 34 35 36 37 38 | private static final char[] HEX_CHARS = "0123456789abcdef".toCharArray(); public static String generateHash(File file, String algorithm) throws NoSuchAlgorithmException, IOException { byte[] dataBytes = getFileContents(file); MessageDigest messageDigest = MessageDigest.getInstance(algorithm); messageDigest.update(dataBytes); byte[] digestBytes = messageDigest.digest(); // this chunk of code was taken from http://echochamber.me/viewtopic.php?f=11&t=16666&p=553936#p459685 char[] hash = new char[2 * digestBytes.length]; for (int i = 0; i < digestBytes.length; ++i) { hash[2 * i] = HEX_CHARS[(digestBytes[i] & 0xF0) >>> 4]; hash[2 * i + 1] = HEX_CHARS[digestBytes[i] & 0x0F]; } return new String(hash); } private static byte[] getFileContents(File file) throws IOException { FileInputStream fileInputStream = null; try { fileInputStream = new FileInputStream(file); byte fileBytes[] = new byte[fileInputStream.available()]; fileInputStream.read(fileBytes); return fileBytes; } catch (IOException e) { throw e; } finally { if (fileInputStream != null) try { fileInputStream.close(); } catch (IOException e) { } finally { fileInputStream = null; } } } |