/**
* Gets this hash sum as an array of 16 bytes.
*
* @return Array of 16 bytes, the hash of all updated bytes.
*/
public byte[] getHash() {
if (!finalState.valid) {
finalState.copy(workingState);
long bitCount = finalState.bitCount;
// Compute the number of left over bits
int leftOver = (int) (((bitCount >>> 3)) & 0x3f);
// Compute the amount of padding to add based on number of left over
// bits.
int padlen = (leftOver < 56) ? (56 - leftOver) : (120 - leftOver);
// add the padding
update(finalState, padding, 0, padlen);
// add the length (computed before padding was added)
update(finalState, encode(bitCount), 0, 8);
finalState.valid = true;
}
// make a copy of the hash before returning it.
return encode(finalState.state, 16);
}
/**
* Gets the MD5 hash the data on the given InputStream.
*
* @param in byte array for which an MD5 hash is desired.
* @return Array of 16 bytes, the hash of all updated bytes.
* @throws IOException if an I/O error occurs.
*/
public static byte[] getHash(InputStream in) throws IOException {
MD5 md5 = new MD5();
byte[] buffer = new byte[1024];
int read;
while ((read = in.read(buffer)) != -1) {
md5.update(buffer, read);
}
return md5.getHash();
}
/**
* Gets the MD5 hash of the given byte array.
*
* @param b byte array for which an MD5 hash is desired.
* @return 32-character hex representation the data's MD5 hash.
*/
public static String getHashString(byte[] b) {
MD5 md5 = new MD5();
md5.update(b);
return md5.getHashString();
}
/**
* Gets the MD5 hash of the given byte array.
*
* @param b byte array for which an MD5 hash is desired.
* @return Array of 16 bytes, the hash of all updated bytes.
*/
public static byte[] getHash(byte[] b) {
MD5 md5 = new MD5();
md5.update(b);
return md5.getHash();
}
/**
* Update this hash with a String.
*
* @param s String to be hashed.
* @param enc The name of a supported character encoding.
* @throws UnsupportedEncodingException If the named encoding is not supported.
*/
public void update(String s, String enc) throws UnsupportedEncodingException {
update(s.getBytes(enc));
}
/**
* Update this hash with a String. The string is converted to bytes using the current platform's
* default character encoding.
*
* @param s String to be hashed.
*/
public void update(String s) {
update(s.getBytes());
}
/**
* Updates this hash with a single byte.
*
* @param b byte to be hashed.
*/
public void update(byte b) {
byte buffer[] = new byte[1];
buffer[0] = b;
update(buffer, 1);
}
/**
* Update this hash with the given data.
*
* @param buffer Array of bytes to be hashed.
*/
public void update(byte buffer[]) {
update(buffer, 0, buffer.length);
}
/**
* Update this hash with the given data.
*
* <p>If length bytes are not available to be hashed, as many bytes as possible will be hashed.
*
* @param buffer Array of bytes to be hashed.
* @param length number of bytes to hash.
*/
public void update(byte buffer[], int length) {
update(buffer, 0, length);
}
/**
* Update this hash with the given data.
*
* <p>If length bytes are not available to be hashed, as many bytes as possible will be hashed.
*
* @param buffer Array of bytes to be hashed.
* @param offset Offset to buffer array.
* @param length number of bytes to hash.
*/
public void update(byte buffer[], int offset, int length) {
update(workingState, buffer, offset, length);
}
/**
* Gets the MD5 hash of the given String.
*
* @param s String for which an MD5 hash is desired.
* @param enc The name of a supported character encoding.
* @return 32-character hex representation the data's MD5 hash.
* @throws UnsupportedEncodingException If the named encoding is not supported.
* @since ostermillerutils 1.00.00
*/
public static String getHashString(String s, String enc) throws UnsupportedEncodingException {
MD5 md5 = new MD5();
md5.update(s, enc);
return md5.getHashString();
}
/**
* Gets the MD5 hash of the given String. The string is converted to bytes using the current
* platform's default character encoding.
*
* @param s String for which an MD5 hash is desired.
* @return 32-character hex representation the data's MD5 hash.
*/
public static String getHashString(String s) {
MD5 md5 = new MD5();
md5.update(s);
return md5.getHashString();
}
/**
* Gets the MD5 hash of the given String. The string is converted to bytes using the current
* platform's default character encoding.
*
* @param s String for which an MD5 hash is desired.
* @return Array of 16 bytes, the hash of all updated bytes.
*/
public static byte[] getHash(String s) {
MD5 md5 = new MD5();
md5.update(s);
return md5.getHash();
}
