Java SHA1 SHA1(InputStream in)

Description

SHA

License

Open Source License

Declaration

public static byte[] SHA1(InputStream in) throws IOException 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.*;

import java.security.*;

public class Main {
    private static final ThreadLocal<MessageDigest> sha1 = new ThreadLocal<MessageDigest>() {
        @Override/*from  w w  w.ja va 2s.  com*/
        protected MessageDigest initialValue() {
            MessageDigest crypt = null;
            try {
                crypt = MessageDigest.getInstance("SHA-1");
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            }
            return crypt;
        }
    };

    public static byte[] SHA1(InputStream in) throws IOException {
        MessageDigest crypt = sha1.get();
        crypt.reset();
        // Transfer bytes from in to out
        byte[] buf = new byte[4 * 1024];
        int len;
        while ((len = in.read(buf)) > 0) {
            Thread.yield();
            // out.write(buf, 0, len);
            crypt.update(buf, 0, len);
        }
        in.close();
        return crypt.digest();
    }

    public static byte[] SHA1(String fileName) throws IOException {
        MessageDigest crypt = sha1.get();
        crypt.reset();
        FileInputStream in = new FileInputStream(fileName);
        // Transfer bytes from in to out
        byte[] buf = new byte[4 * 1024];
        int len;
        while ((len = in.read(buf)) > 0) {
            Thread.yield();
            // out.write(buf, 0, len);
            crypt.update(buf, 0, len);
        }
        in.close();
        return crypt.digest();
    }

    public static byte[] SHA1(byte[] src) {
        MessageDigest crypt = sha1.get();
        crypt.reset();
        crypt.update(src);
        return crypt.digest();
    }

    public static byte[] SHA1(byte[]... src1) {
        MessageDigest crypt = sha1.get();
        crypt.reset();
        for (int i = 0; i < src1.length; i++) {
            crypt.update(src1[i]);
        }
        return crypt.digest();
    }
}

Related

1. sha1(final String str)
2. sha1(final String string)
3. SHA1(final String text)
4. sha1(final String text)
5. sha1(final String todigest)
6. SHA1(MessageDigest messageDigest, String... texts)
7. sha1(Object object)
8. sha1(String data)
9. sha1(String data)