Apache 의 DigestUtils 암호 화 및 복호화
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/*
* 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 immutable and thread-safe.
*
* @version $Id: DigestUtils.java 1634433 2014-10-27 01:10:47Z ggregory $
*/
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 the digest
* @throws IOException
* On error reading from the stream
*/
private static byte[] digest(final MessageDigest digest, final InputStream data) throws IOException {
return updateDigest(digest, data).digest();
}
/**
* Returns a MessageDigest for the given algorithm.
*
* @param algorithm
* the name of the algorithm requested. See Appendix A in the Java Cryptography Architecture Reference Guide for information about standard
* algorithm names.
* @return A digest instance.
* @see MessageDigest#getInstance(String)
* @throws IllegalArgumentException
* when a {@link NoSuchAlgorithmException} is caught.
*/
public static MessageDigest getDigest(final String algorithm) {
try {
return MessageDigest.getInstance(algorithm);
} catch (final 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.
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @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.
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @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.
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @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 byte[].
*
* @param data
* Data to digest
* @return MD2 digest
* @since 1.7
*/
public static byte[] md2(final byte[] data) {
return getMd2Digest().digest(data);
}
/**
* Calculates the MD2 digest and returns the value as a 16 element byte[].
*
* @param data
* Data to digest
* @return MD2 digest
* @throws IOException
* On error reading from the stream
* @since 1.7
*/
public static byte[] md2(final InputStream data) throws IOException {
return digest(getMd2Digest(), data);
}
/**
* Calculates the MD2 digest and returns the value as a 16 element byte[].
*
* @param data
* Data to digest; converted to bytes using {@link StringUtils#getBytesUtf8(String)}
* @return MD2 digest
* @since 1.7
*/
public static byte[] md2(final String data) {
return md2(StringUtils.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(final 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(final 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(final String data) {
return Hex.encodeHexString(md2(data));
}
/**
* Calculates the MD5 digest and returns the value as a 16 element byte[].
*
* @param data
* Data to digest
* @return MD5 digest
*/
public static byte[] md5(final byte[] data) {
return getMd5Digest().digest(data);
}
/**
* Calculates the MD5 digest and returns the value as a 16 element byte[].
*
* @param data
* Data to digest
* @return MD5 digest
* @throws IOException
* On error reading from the stream
* @since 1.4
*/
public static byte[] md5(final InputStream data) throws IOException {
return digest(getMd5Digest(), data);
}
/**
* Calculates the MD5 digest and returns the value as a 16 element byte[].
*
* @param data
* Data to digest; converted to bytes using {@link StringUtils#getBytesUtf8(String)}
* @return MD5 digest
*/
public static byte[] md5(final String data) {
return md5(StringUtils.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(final 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(final 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(final String data) {
return Hex.encodeHexString(md5(data));
}
/**
* Calculates the SHA-1 digest and returns the value as a byte[].
*
* @param data
* Data to digest
* @return SHA-1 digest
* @deprecated Use {@link #sha1(byte[])}
*/
@Deprecated
public static byte[] sha(final byte[] data) {
return sha1(data);
}
/**
* Calculates the SHA-1 digest and returns the value as a byte[].
*
* @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(final InputStream data) throws IOException {
return sha1(data);
}
/**
* Calculates the SHA-1 digest and returns the value as a byte[].
*
* @param data
* Data to digest
* @return SHA-1 digest
* @deprecated Use {@link #sha1(String)}
*/
@Deprecated
public static byte[] sha(final String data) {
return sha1(data);
}
/**
* Calculates the SHA-1 digest and returns the value as a byte[].
*
* @param data
* Data to digest
* @return SHA-1 digest
* @since 1.7
*/
public static byte[] sha1(final byte[] data) {
return getSha1Digest().digest(data);
}
/**
* Calculates the SHA-1 digest and returns the value as a byte[].
*
* @param data
* Data to digest
* @return SHA-1 digest
* @throws IOException
* On error reading from the stream
* @since 1.7
*/
public static byte[] sha1(final InputStream data) throws IOException {
return digest(getSha1Digest(), data);
}
/**
* Calculates the SHA-1 digest and returns the value as a byte[].
*
* @param data
* Data to digest; converted to bytes using {@link StringUtils#getBytesUtf8(String)}
* @return SHA-1 digest
*/
public static byte[] sha1(final String data) {
return sha1(StringUtils.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(final 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(final 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(final String data) {
return Hex.encodeHexString(sha1(data));
}
/**
* Calculates the SHA-256 digest and returns the value as a byte[].
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest
* @return SHA-256 digest
* @since 1.4
*/
public static byte[] sha256(final byte[] data) {
return getSha256Digest().digest(data);
}
/**
* Calculates the SHA-256 digest and returns the value as a byte[].
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest
* @return SHA-256 digest
* @throws IOException
* On error reading from the stream
* @since 1.4
*/
public static byte[] sha256(final InputStream data) throws IOException {
return digest(getSha256Digest(), data);
}
/**
* Calculates the SHA-256 digest and returns the value as a byte[].
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest; converted to bytes using {@link StringUtils#getBytesUtf8(String)}
* @return SHA-256 digest
* @since 1.4
*/
public static byte[] sha256(final String data) {
return sha256(StringUtils.getBytesUtf8(data));
}
/**
* Calculates the SHA-256 digest and returns the value as a hex string.
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest
* @return SHA-256 digest as a hex string
* @since 1.4
*/
public static String sha256Hex(final byte[] data) {
return Hex.encodeHexString(sha256(data));
}
/**
* Calculates the SHA-256 digest and returns the value as a hex string.
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @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(final InputStream data) throws IOException {
return Hex.encodeHexString(sha256(data));
}
/**
* Calculates the SHA-256 digest and returns the value as a hex string.
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest
* @return SHA-256 digest as a hex string
* @since 1.4
*/
public static String sha256Hex(final String data) {
return Hex.encodeHexString(sha256(data));
}
/**
* Calculates the SHA-384 digest and returns the value as a byte[].
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest
* @return SHA-384 digest
* @since 1.4
*/
public static byte[] sha384(final byte[] data) {
return getSha384Digest().digest(data);
}
/**
* Calculates the SHA-384 digest and returns the value as a byte[].
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest
* @return SHA-384 digest
* @throws IOException
* On error reading from the stream
* @since 1.4
*/
public static byte[] sha384(final InputStream data) throws IOException {
return digest(getSha384Digest(), data);
}
/**
* Calculates the SHA-384 digest and returns the value as a byte[].
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest; converted to bytes using {@link StringUtils#getBytesUtf8(String)}
* @return SHA-384 digest
* @since 1.4
*/
public static byte[] sha384(final String data) {
return sha384(StringUtils.getBytesUtf8(data));
}
/**
* Calculates the SHA-384 digest and returns the value as a hex string.
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest
* @return SHA-384 digest as a hex string
* @since 1.4
*/
public static String sha384Hex(final byte[] data) {
return Hex.encodeHexString(sha384(data));
}
/**
* Calculates the SHA-384 digest and returns the value as a hex string.
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @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(final InputStream data) throws IOException {
return Hex.encodeHexString(sha384(data));
}
/**
* Calculates the SHA-384 digest and returns the value as a hex string.
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest
* @return SHA-384 digest as a hex string
* @since 1.4
*/
public static String sha384Hex(final String data) {
return Hex.encodeHexString(sha384(data));
}
/**
* Calculates the SHA-512 digest and returns the value as a byte[].
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest
* @return SHA-512 digest
* @since 1.4
*/
public static byte[] sha512(final byte[] data) {
return getSha512Digest().digest(data);
}
/**
* Calculates the SHA-512 digest and returns the value as a byte[].
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest
* @return SHA-512 digest
* @throws IOException
* On error reading from the stream
* @since 1.4
*/
public static byte[] sha512(final InputStream data) throws IOException {
return digest(getSha512Digest(), data);
}
/**
* Calculates the SHA-512 digest and returns the value as a byte[].
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest; converted to bytes using {@link StringUtils#getBytesUtf8(String)}
* @return SHA-512 digest
* @since 1.4
*/
public static byte[] sha512(final String data) {
return sha512(StringUtils.getBytesUtf8(data));
}
/**
* Calculates the SHA-512 digest and returns the value as a hex string.
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest
* @return SHA-512 digest as a hex string
* @since 1.4
*/
public static String sha512Hex(final byte[] data) {
return Hex.encodeHexString(sha512(data));
}
/**
* Calculates the SHA-512 digest and returns the value as a hex string.
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @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(final InputStream data) throws IOException {
return Hex.encodeHexString(sha512(data));
}
/**
* Calculates the SHA-512 digest and returns the value as a hex string.
*
* Throws a RuntimeException on JRE versions prior to 1.4.0.
*
*
* @param data
* Data to digest
* @return SHA-512 digest as a hex string
* @since 1.4
*/
public static String sha512Hex(final 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(final 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(final 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(final 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, final byte[] valueToDigest) {
messageDigest.update(valueToDigest);
return messageDigest;
}
/**
* Reads through an InputStream and updates the digest for the data
*
* @param digest
* The MessageDigest to use (e.g. MD5)
* @param data
* Data to digest
* @return the digest
* @throws IOException
* On error reading from the stream
* @since 1.8
*/
public static MessageDigest updateDigest(final 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);
}
return digest;
}
/**
* Updates the given {@link MessageDigest}.
*
* @param messageDigest
* the {@link MessageDigest} to update
* @param valueToDigest
* the value to update the {@link MessageDigest} with;
* converted to bytes using {@link StringUtils#getBytesUtf8(String)}
* @return the updated {@link MessageDigest}
* @since 1.7
*/
public static MessageDigest updateDigest(final MessageDigest messageDigest, final String valueToDigest) {
messageDigest.update(StringUtils.getBytesUtf8(valueToDigest));
return messageDigest;
}
}
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