65 lines
1.8 KiB
Java
65 lines
1.8 KiB
Java
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package zutil;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.Serializable;
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import java.math.BigInteger;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import sun.misc.BASE64Encoder;
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public class Hasher {
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/**
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* Returns a hash of a file
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*
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* @param file The path to the file
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* @param hashType The hash type
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* @return A String with the hash
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* @throws NoSuchAlgorithmException
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* @throws IOException
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*/
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public static String hash(File file, String hashType) throws NoSuchAlgorithmException, IOException {
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MessageDigest digest = MessageDigest.getInstance(hashType);//"MD5"
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InputStream is = new FileInputStream(file);
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String output = "";
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byte[] buffer = new byte[8192];
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int read = 0;
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try {
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while( (read = is.read(buffer)) > 0) {
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digest.update(buffer, 0, read);
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}
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byte[] md5sum = digest.digest();
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BigInteger bigInt = new BigInteger(1, md5sum);
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output = bigInt.toString(16);
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}
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catch(IOException e) {
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throw new RuntimeException("Unable to process file for MD5", e);
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}
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is.close();
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MultiPrintStream.out.println("File Hash: "+output);
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return output;
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}
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/**
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* Returns the hash of the given object
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*
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* @param object The object to hash
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* @param hashType The hash method
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* @return String containing the hash
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* @throws NoSuchAlgorithmException
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*/
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public static String hash(Serializable object, String hashType) throws NoSuchAlgorithmException {
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MessageDigest md = null;
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md = MessageDigest.getInstance(hashType); //MD5 || SHA
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md.update(Converter.toBytes(object));
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byte raw[] = md.digest();
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return (new BASE64Encoder()).encode(raw);
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}
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}
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