Java SHA1 sha1Digest(final InputStream data)

Description

sha Digest

License

Apache License

Declaration

public static byte[] sha1Digest(final InputStream data) throws NoSuchAlgorithmException, IOException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    private static final int STREAM_BUFFER_LENGTH = 1024;

    public static byte[] sha1Digest(final InputStream data) throws NoSuchAlgorithmException, IOException {
        MessageDigest digest = getSHA1MessageDigest();
        updateMessageDigest(digest, data);
        return digest.digest();
    }//from  w  ww  .  j  a v a 2 s  .c  o m

    public static byte[] sha1Digest(final byte[] data) throws NoSuchAlgorithmException {
        return getSHA1MessageDigest().digest(data);
    }

    public static byte[] sha1Digest(final String data, final Charset charset) throws NoSuchAlgorithmException {
        return getSHA1MessageDigest().digest(data.getBytes(charset));
    }

    public static MessageDigest getSHA1MessageDigest() throws NoSuchAlgorithmException {
        return getMessageDigest("SHA-1");
    }

    private static void updateMessageDigest(MessageDigest digest, final InputStream data) throws IOException {
        final byte[] buffer = new byte[STREAM_BUFFER_LENGTH];
        int read = data.read(buffer, 0, STREAM_BUFFER_LENGTH);

        while (read > -1) {
            digest.update(buffer, 0, read);
            read = data.read(buffer, 0, STREAM_BUFFER_LENGTH);
        }
    }

    public static MessageDigest getMessageDigest(final String algorithm) throws NoSuchAlgorithmException {
        return MessageDigest.getInstance(algorithm);
    }
}

Related

1. sha1AsBytes(String input)
2. sha1ByString(String str)
3. SHA1Checksum(String filename)
4. sha1Digest(byte[] bytes)
5. sha1Digest(byte[] bytes)
6. sha1Digest(String src)
7. sha1DigestAsHex(String data)
8. sha1Encode(byte[] content)
9. SHA1Encode(String sourceString)