Examples of java.security.MessageDigest.update()

java.security.MessageDigest.update()
Updates the digest using the specified byte. @param input the byte with which to update the digest.

            raf.readFully(a, 0, mb);
            digest.update(a, 0, mb);
            raf.seek(fl - mb);
            raf.readFully(a, 0, mb);
            digest.update(a, 0, mb);
            digest.update(NaturalOrder.encodeLong(fl, 8), 0, 8);
            if (includeDate) digest.update(NaturalOrder.encodeLong(file.lastModified(), 8), 0, 8);
        } finally {
            raf.close();
            try {raf.getChannel().close();} catch (final IOException e) {}
        }

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            digest.update(a, 0, mb);
            raf.seek(fl - mb);
            raf.readFully(a, 0, mb);
            digest.update(a, 0, mb);
            digest.update(NaturalOrder.encodeLong(fl, 8), 0, 8);
            if (includeDate) digest.update(NaturalOrder.encodeLong(file.lastModified(), 8), 0, 8);
        } finally {
            raf.close();
            try {raf.getChannel().close();} catch (final IOException e) {}
        }
        return digest.digest();

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            final MessageDigest digest = MessageDigest.getInstance("MD5");
            digest.reset();
            final InputStream  in = new ByteArrayInputStream(b);
            final byte[] buf = new byte[2048];
            int n;
            while ((n = in.read(buf)) > 0) digest.update(buf, 0, n);
            in.close();
            // now compute the hex-representation of the md5 digest
            return digest.digest();
        } catch (final java.security.NoSuchAlgorithmException e) {
            System.out.println("Internal Error at md5:" + e.getMessage());

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        buf.flip();
        
        try {
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            md5.reset();
            md5.update(buf.array());
            return md5.digest();
        } catch (NoSuchAlgorithmException nse) {
            throw new IOException(nse.toString());
        }
    }

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    byte[] randomBytes = new byte[16];
    random.nextBytes(randomBytes);      


    MessageDigest md5 = getMd5Digest();
    md5.reset();
         md5.update(secretBytes);
         md5.update(randomBytes);
    return md5.digest();
  }
  
  /**

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    random.nextBytes(randomBytes);      


    MessageDigest md5 = getMd5Digest();
    md5.reset();
         md5.update(secretBytes);
         md5.update(randomBytes);
    return md5.digest();
  }
  
  /**
   * AccountingRequest overrides this

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   * @return new 16 byte response authenticator
   */
  protected byte[] createResponseAuthenticator(String sharedSecret, int packetLength, byte[] attributes, byte[] requestAuthenticator) {
    MessageDigest md5 = getMd5Digest();
    md5.reset();
        md5.update((byte)getPacketType());
        md5.update((byte)getPacketIdentifier());
        md5.update((byte)(packetLength >> 8));
        md5.update((byte)(packetLength & 0x0ff));
        md5.update(requestAuthenticator, 0, requestAuthenticator.length);
        md5.update(attributes, 0, attributes.length);

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   */
  protected byte[] createResponseAuthenticator(String sharedSecret, int packetLength, byte[] attributes, byte[] requestAuthenticator) {
    MessageDigest md5 = getMd5Digest();
    md5.reset();
        md5.update((byte)getPacketType());
        md5.update((byte)getPacketIdentifier());
        md5.update((byte)(packetLength >> 8));
        md5.update((byte)(packetLength & 0x0ff));
        md5.update(requestAuthenticator, 0, requestAuthenticator.length);
        md5.update(attributes, 0, attributes.length);
        md5.update(RadiusUtil.getUtf8Bytes(sharedSecret));

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  protected byte[] createResponseAuthenticator(String sharedSecret, int packetLength, byte[] attributes, byte[] requestAuthenticator) {
    MessageDigest md5 = getMd5Digest();
    md5.reset();
        md5.update((byte)getPacketType());
        md5.update((byte)getPacketIdentifier());
        md5.update((byte)(packetLength >> 8));
        md5.update((byte)(packetLength & 0x0ff));
        md5.update(requestAuthenticator, 0, requestAuthenticator.length);
        md5.update(attributes, 0, attributes.length);
        md5.update(RadiusUtil.getUtf8Bytes(sharedSecret));
        return md5.digest();

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    MessageDigest md5 = getMd5Digest();
    md5.reset();
        md5.update((byte)getPacketType());
        md5.update((byte)getPacketIdentifier());
        md5.update((byte)(packetLength >> 8));
        md5.update((byte)(packetLength & 0x0ff));
        md5.update(requestAuthenticator, 0, requestAuthenticator.length);
        md5.update(attributes, 0, attributes.length);
        md5.update(RadiusUtil.getUtf8Bytes(sharedSecret));
        return md5.digest();    
  }

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