Coverage Report

Coverage Report - org.apache.commons.codec.digest.DigestUtils

Classes in this File
Line Coverage
Branch Coverage
Complexity
DigestUtils
95%
61/64
100%
2/2
1.074
 /*
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.
  * The ASF licenses this file to You under the Apache License, Version 2.0
  * (the "License"); you may not use this file except in compliance with
  * the License.  You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 package org.apache.commons.codec.digest;
 
 import java.io.IOException;
 import java.io.InputStream;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 
 import org.apache.commons.codec.binary.Hex;
 import org.apache.commons.codec.binary.StringUtils;
 
 /**
  * Operations to simplify common {@link java.security.MessageDigest} tasks. This class is thread safe.
  *
  * @version $Id$
  */
 public class DigestUtils {
 
     private static final int STREAM_BUFFER_LENGTH = 1024;
 
     /**
      * Read through an InputStream and returns the digest for the data
      *
      * @param digest
      *            The MessageDigest to use (e.g. MD5)
      * @param data
      *            Data to digest
      * @return MD5 digest
      * @throws IOException
      *             On error reading from the stream
      */
     private static byte[] digest(MessageDigest digest, InputStream data) throws IOException {
         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);
         }
 
         return digest.digest();
     }
 
     /**
      * Calls {@link StringUtils#getBytesUtf8(String)}
      *
      * @param data
      *            the String to encode
      * @return encoded bytes
      */
     private static byte[] getBytesUtf8(String data) {
         return StringUtils.getBytesUtf8(data);
     }
 
     /**
      * Returns a <code>MessageDigest</code> for the given <code>algorithm</code>.
      *
      * @param algorithm
      *            the name of the algorithm requested. See <a
      *            href="http://java.sun.com/j2se/1.3/docs/guide/security/CryptoSpec.html#AppA">Appendix A in the Java
      *            Cryptography Architecture API Specification & Reference</a> for information about standard algorithm
      *            names.
      * @return An MD5 digest instance.
      * @see MessageDigest#getInstance(String)
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught.
      */
     public static MessageDigest getDigest(String algorithm) {
         try {
             return MessageDigest.getInstance(algorithm);
         } catch (NoSuchAlgorithmException e) {
             throw new IllegalArgumentException(e);
         }
     }
 
     /**
      * Returns an MD2 MessageDigest.
      *
      * @return An MD2 digest instance.
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught, which should never happen because MD2 is a
      *             built-in algorithm
      * @see MessageDigestAlgorithms#MD2
      * @since 1.7
      */
     public static MessageDigest getMd2Digest() {
         return getDigest(MessageDigestAlgorithms.MD2);
     }
 
     /**
      * Returns an MD5 MessageDigest.
      *
      * @return An MD5 digest instance.
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught, which should never happen because MD5 is a
      *             built-in algorithm
      * @see MessageDigestAlgorithms#MD5
      */
     public static MessageDigest getMd5Digest() {
         return getDigest(MessageDigestAlgorithms.MD5);
     }
 
     /**
      * Returns an SHA-1 digest.
      *
      * @return An SHA-1 digest instance.
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught, which should never happen because SHA-1 is a
      *             built-in algorithm
      * @see MessageDigestAlgorithms#SHA_1
      * @since 1.7
      */
     public static MessageDigest getSha1Digest() {
         return getDigest(MessageDigestAlgorithms.SHA_1);
     }
 
     /**
      * Returns an SHA-256 digest.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @return An SHA-256 digest instance.
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught, which should never happen because SHA-256 is a
      *             built-in algorithm
      * @see MessageDigestAlgorithms#SHA_256
      */
     public static MessageDigest getSha256Digest() {
         return getDigest(MessageDigestAlgorithms.SHA_256);
     }
 
     /**
      * Returns an SHA-384 digest.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @return An SHA-384 digest instance.
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught, which should never happen because SHA-384 is a
      *             built-in algorithm
      * @see MessageDigestAlgorithms#SHA_384
      */
     public static MessageDigest getSha384Digest() {
         return getDigest(MessageDigestAlgorithms.SHA_384);
     }
 
     /**
      * Returns an SHA-512 digest.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @return An SHA-512 digest instance.
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught, which should never happen because SHA-512 is a
      *             built-in algorithm
      * @see MessageDigestAlgorithms#SHA_512
      */
     public static MessageDigest getSha512Digest() {
         return getDigest(MessageDigestAlgorithms.SHA_512);
     }
 
     /**
      * Returns an SHA-1 digest.
      *
      * @return An SHA-1 digest instance.
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught
      * @deprecated Use {@link #getSha1Digest()}
      */
     @Deprecated
     public static MessageDigest getShaDigest() {
         return getSha1Digest();
     }
 
     /**
      * Calculates the MD2 digest and returns the value as a 16 element <code>byte[]</code>.
      *
      * @param data
      *            Data to digest
      * @return MD2 digest
      * @since 1.7
      */
     public static byte[] md2(byte[] data) {
         return getMd2Digest().digest(data);
     }
 
     /**
      * Calculates the MD2 digest and returns the value as a 16 element <code>byte[]</code>.
      *
      * @param data
      *            Data to digest
      * @return MD2 digest
      * @throws IOException
      *             On error reading from the stream
      * @since 1.7
      */
     public static byte[] md2(InputStream data) throws IOException {
         return digest(getMd2Digest(), data);
     }
 
     /**
      * Calculates the MD2 digest and returns the value as a 16 element <code>byte[]</code>.
      *
      * @param data
      *            Data to digest
      * @return MD2 digest
      * @since 1.7
      */
     public static byte[] md2(String data) {
         return md2(getBytesUtf8(data));
     }
 
     /**
      * Calculates the MD2 digest and returns the value as a 32 character hex string.
      *
      * @param data
      *            Data to digest
      * @return MD2 digest as a hex string
      * @since 1.7
      */
     public static String md2Hex(byte[] data) {
         return Hex.encodeHexString(md2(data));
     }
 
     /**
      * Calculates the MD2 digest and returns the value as a 32 character hex string.
      *
      * @param data
      *            Data to digest
      * @return MD2 digest as a hex string
      * @throws IOException
      *             On error reading from the stream
      * @since 1.7
      */
     public static String md2Hex(InputStream data) throws IOException {
         return Hex.encodeHexString(md2(data));
     }
 
     /**
      * Calculates the MD2 digest and returns the value as a 32 character hex string.
      *
      * @param data
      *            Data to digest
      * @return MD2 digest as a hex string
      * @since 1.7
      */
     public static String md2Hex(String data) {
         return Hex.encodeHexString(md2(data));
     }
 
     /**
      * Calculates the MD5 digest and returns the value as a 16 element <code>byte[]</code>.
      *
      * @param data
      *            Data to digest
      * @return MD5 digest
      */
     public static byte[] md5(byte[] data) {
         return getMd5Digest().digest(data);
     }
 
     /**
      * Calculates the MD5 digest and returns the value as a 16 element <code>byte[]</code>.
      *
      * @param data
      *            Data to digest
      * @return MD5 digest
      * @throws IOException
      *             On error reading from the stream
      * @since 1.4
      */
     public static byte[] md5(InputStream data) throws IOException {
         return digest(getMd5Digest(), data);
     }
 
     /**
      * Calculates the MD5 digest and returns the value as a 16 element <code>byte[]</code>.
      *
      * @param data
      *            Data to digest
      * @return MD5 digest
      */
     public static byte[] md5(String data) {
         return md5(getBytesUtf8(data));
     }
 
     /**
      * Calculates the MD5 digest and returns the value as a 32 character hex string.
      *
      * @param data
      *            Data to digest
      * @return MD5 digest as a hex string
      */
     public static String md5Hex(byte[] data) {
         return Hex.encodeHexString(md5(data));
     }
 
     /**
      * Calculates the MD5 digest and returns the value as a 32 character hex string.
      *
      * @param data
      *            Data to digest
      * @return MD5 digest as a hex string
      * @throws IOException
      *             On error reading from the stream
      * @since 1.4
      */
     public static String md5Hex(InputStream data) throws IOException {
         return Hex.encodeHexString(md5(data));
     }
 
     /**
      * Calculates the MD5 digest and returns the value as a 32 character hex string.
      *
      * @param data
      *            Data to digest
      * @return MD5 digest as a hex string
      */
     public static String md5Hex(String data) {
         return Hex.encodeHexString(md5(data));
     }
 
     /**
      * Calculates the SHA-1 digest and returns the value as a <code>byte[]</code>.
      *
      * @param data
      *            Data to digest
      * @return SHA-1 digest
      * @deprecated Use {@link #sha1(byte[])}
      */
     @Deprecated
     public static byte[] sha(byte[] data) {
         return sha1(data);
     }
 
     /**
      * Calculates the SHA-1 digest and returns the value as a <code>byte[]</code>.
      *
      * @param data
      *            Data to digest
      * @return SHA-1 digest
      * @throws IOException
      *             On error reading from the stream
      * @since 1.4
      * @deprecated Use {@link #sha1(InputStream)}
      */
     @Deprecated
     public static byte[] sha(InputStream data) throws IOException {
         return sha1(data);
     }
 
     /**
      * Calculates the SHA-1 digest and returns the value as a <code>byte[]</code>.
      *
      * @param data
      *            Data to digest
      * @return SHA-1 digest
      * @deprecated Use {@link #sha1(String)}
      */
     @Deprecated
     public static byte[] sha(String data) {
         return sha1(data);
     }
 
     /**
      * Calculates the SHA-1 digest and returns the value as a <code>byte[]</code>.
      *
      * @param data
      *            Data to digest
      * @return SHA-1 digest
      * @since 1.7
      */
     public static byte[] sha1(byte[] data) {
         return getSha1Digest().digest(data);
     }
 
     /**
      * Calculates the SHA-1 digest and returns the value as a <code>byte[]</code>.
      *
      * @param data
      *            Data to digest
      * @return SHA-1 digest
      * @throws IOException
      *             On error reading from the stream
      * @since 1.7
      */
     public static byte[] sha1(InputStream data) throws IOException {
         return digest(getSha1Digest(), data);
     }
 
     /**
      * Calculates the SHA-1 digest and returns the value as a <code>byte[]</code>.
      *
      * @param data
      *            Data to digest
      * @return SHA-1 digest
      */
     public static byte[] sha1(String data) {
         return sha1(getBytesUtf8(data));
     }
 
     /**
      * Calculates the SHA-1 digest and returns the value as a hex string.
      *
      * @param data
      *            Data to digest
      * @return SHA-1 digest as a hex string
      * @since 1.7
      */
     public static String sha1Hex(byte[] data) {
         return Hex.encodeHexString(sha1(data));
     }
 
     /**
      * Calculates the SHA-1 digest and returns the value as a hex string.
      *
      * @param data
      *            Data to digest
      * @return SHA-1 digest as a hex string
      * @throws IOException
      *             On error reading from the stream
      * @since 1.7
      */
     public static String sha1Hex(InputStream data) throws IOException {
         return Hex.encodeHexString(sha1(data));
     }
 
     /**
      * Calculates the SHA-1 digest and returns the value as a hex string.
      *
      * @param data
      *            Data to digest
      * @return SHA-1 digest as a hex string
      * @since 1.7
      */
     public static String sha1Hex(String data) {
         return Hex.encodeHexString(sha1(data));
     }
 
     /**
      * Calculates the SHA-256 digest and returns the value as a <code>byte[]</code>.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-256 digest
      * @since 1.4
      */
     public static byte[] sha256(byte[] data) {
         return getSha256Digest().digest(data);
     }
 
     /**
      * Calculates the SHA-256 digest and returns the value as a <code>byte[]</code>.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-256 digest
      * @throws IOException
      *             On error reading from the stream
      * @since 1.4
      */
     public static byte[] sha256(InputStream data) throws IOException {
         return digest(getSha256Digest(), data);
     }
 
     /**
      * Calculates the SHA-256 digest and returns the value as a <code>byte[]</code>.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-256 digest
      * @since 1.4
      */
     public static byte[] sha256(String data) {
         return sha256(getBytesUtf8(data));
     }
 
     /**
      * Calculates the SHA-256 digest and returns the value as a hex string.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-256 digest as a hex string
      * @since 1.4
      */
     public static String sha256Hex(byte[] data) {
         return Hex.encodeHexString(sha256(data));
     }
 
     /**
      * Calculates the SHA-256 digest and returns the value as a hex string.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-256 digest as a hex string
      * @throws IOException
      *             On error reading from the stream
      * @since 1.4
      */
     public static String sha256Hex(InputStream data) throws IOException {
         return Hex.encodeHexString(sha256(data));
     }
 
     /**
      * Calculates the SHA-256 digest and returns the value as a hex string.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-256 digest as a hex string
      * @since 1.4
      */
     public static String sha256Hex(String data) {
         return Hex.encodeHexString(sha256(data));
     }
 
     /**
      * Calculates the SHA-384 digest and returns the value as a <code>byte[]</code>.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-384 digest
      * @since 1.4
      */
     public static byte[] sha384(byte[] data) {
         return getSha384Digest().digest(data);
     }
 
     /**
      * Calculates the SHA-384 digest and returns the value as a <code>byte[]</code>.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-384 digest
      * @throws IOException
      *             On error reading from the stream
      * @since 1.4
      */
     public static byte[] sha384(InputStream data) throws IOException {
         return digest(getSha384Digest(), data);
     }
 
     /**
      * Calculates the SHA-384 digest and returns the value as a <code>byte[]</code>.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-384 digest
      * @since 1.4
      */
     public static byte[] sha384(String data) {
         return sha384(getBytesUtf8(data));
     }
 
     /**
      * Calculates the SHA-384 digest and returns the value as a hex string.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-384 digest as a hex string
      * @since 1.4
      */
     public static String sha384Hex(byte[] data) {
         return Hex.encodeHexString(sha384(data));
     }
 
     /**
      * Calculates the SHA-384 digest and returns the value as a hex string.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-384 digest as a hex string
      * @throws IOException
      *             On error reading from the stream
      * @since 1.4
      */
     public static String sha384Hex(InputStream data) throws IOException {
         return Hex.encodeHexString(sha384(data));
     }
 
     /**
      * Calculates the SHA-384 digest and returns the value as a hex string.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-384 digest as a hex string
      * @since 1.4
      */
     public static String sha384Hex(String data) {
         return Hex.encodeHexString(sha384(data));
     }
 
     /**
      * Calculates the SHA-512 digest and returns the value as a <code>byte[]</code>.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-512 digest
      * @since 1.4
      */
     public static byte[] sha512(byte[] data) {
         return getSha512Digest().digest(data);
     }
 
     /**
      * Calculates the SHA-512 digest and returns the value as a <code>byte[]</code>.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-512 digest
      * @throws IOException
      *             On error reading from the stream
      * @since 1.4
      */
     public static byte[] sha512(InputStream data) throws IOException {
         return digest(getSha512Digest(), data);
     }
 
     /**
      * Calculates the SHA-512 digest and returns the value as a <code>byte[]</code>.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-512 digest
      * @since 1.4
      */
     public static byte[] sha512(String data) {
         return sha512(getBytesUtf8(data));
     }
 
     /**
      * Calculates the SHA-512 digest and returns the value as a hex string.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-512 digest as a hex string
      * @since 1.4
      */
     public static String sha512Hex(byte[] data) {
         return Hex.encodeHexString(sha512(data));
     }
 
     /**
      * Calculates the SHA-512 digest and returns the value as a hex string.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-512 digest as a hex string
      * @throws IOException
      *             On error reading from the stream
      * @since 1.4
      */
     public static String sha512Hex(InputStream data) throws IOException {
         return Hex.encodeHexString(sha512(data));
     }
 
     /**
      * Calculates the SHA-512 digest and returns the value as a hex string.
      * <p>
      * Throws a <code>RuntimeException</code> on JRE versions prior to 1.4.0.
      * </p>
      *
      * @param data
      *            Data to digest
      * @return SHA-512 digest as a hex string
      * @since 1.4
      */
     public static String sha512Hex(String data) {
         return Hex.encodeHexString(sha512(data));
     }
 
     /**
      * Calculates the SHA-1 digest and returns the value as a hex string.
      *
      * @param data
      *            Data to digest
      * @return SHA-1 digest as a hex string
      * @deprecated Use {@link #sha1Hex(byte[])}
      */
     @Deprecated
     public static String shaHex(byte[] data) {
         return sha1Hex(data);
     }
 
     /**
      * Calculates the SHA-1 digest and returns the value as a hex string.
      *
      * @param data
      *            Data to digest
      * @return SHA-1 digest as a hex string
      * @throws IOException
      *             On error reading from the stream
      * @since 1.4
      * @deprecated Use {@link #sha1Hex(InputStream)}
      */
     @Deprecated
     public static String shaHex(InputStream data) throws IOException {
         return sha1Hex(data);
     }
 
     /**
      * Calculates the SHA-1 digest and returns the value as a hex string.
      *
      * @param data
      *            Data to digest
      * @return SHA-1 digest as a hex string
      * @deprecated Use {@link #sha1Hex(String)}
      */
     @Deprecated
     public static String shaHex(String data) {
         return sha1Hex(data);
     }
 
     /**
      * Updates the given {@link MessageDigest}.
      *
      * @param messageDigest
      *            the {@link MessageDigest} to update
      * @param valueToDigest
      *            the value to update the {@link MessageDigest} with
      * @return the updated {@link MessageDigest}
      * @since 1.7
      */
     public static MessageDigest updateDigest(final MessageDigest messageDigest, byte[] valueToDigest) {
         messageDigest.update(valueToDigest);
         return messageDigest;
     }
 
     /**
      * Updates the given {@link MessageDigest}.
      *
      * @param messageDigest
      *            the {@link MessageDigest} to update
      * @param valueToDigest
      *            the value to update the {@link MessageDigest} with
      * @return the updated {@link MessageDigest}
      * @since 1.7
      */
     public static MessageDigest updateDigest(final MessageDigest messageDigest, final String valueToDigest) {
         messageDigest.update(getBytesUtf8(valueToDigest));
         return messageDigest;
     }
 }