111 lines
3.0 KiB
Java
111 lines
3.0 KiB
Java
|
package com.fuint.utils;
|
|||
|
|
|
|||
|
|
import com.fuint.exception.Exceptions;
|
|||
|
|
import org.apache.commons.lang.Validate;
|
|||
|
|
import java.io.IOException;
|
|||
|
|
import java.io.InputStream;
|
|||
|
|
import java.security.GeneralSecurityException;
|
|||
|
|
import java.security.MessageDigest;
|
|||
|
|
import java.security.SecureRandom;
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* 支持SHA-1/MD5消息摘要的工具类.
|
|||
|
|
*
|
|||
|
|
* 返回ByteSource，可进一步被编码为Hex, Base64或UrlSafeBase64
|
|||
|
|
*
|
|||
|
|
* Created by FSQ
|
|||
|
|
* CopyRight https://www.fuint.cn
|
|||
|
|
*/
|
|||
|
|
public class Digests {
|
|||
|
|
|
|||
|
|
private static final String SHA1 = "SHA-1";
|
|||
|
|
private static final String MD5 = "MD5";
|
|||
|
|
|
|||
|
|
private static SecureRandom random = new SecureRandom();
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* 对输入字符串进行sha1散列.
|
|||
|
|
*/
|
|||
|
|
public static byte[] sha1(byte[] input) {
|
|||
|
|
return digest(input, SHA1, null, 1);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public static byte[] sha1(byte[] input, byte[] salt) {
|
|||
|
|
return digest(input, SHA1, salt, 1);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public static byte[] sha1(byte[] input, byte[] salt, int iterations) {
|
|||
|
|
return digest(input, SHA1, salt, iterations);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* 对字符串进行散列, 支持md5与sha1算法.
|
|||
|
|
*/
|
|||
|
|
private static byte[] digest(byte[] input, String algorithm, byte[] salt, int iterations) {
|
|||
|
|
try {
|
|||
|
|
MessageDigest digest = MessageDigest.getInstance(algorithm);
|
|||
|
|
|
|||
|
|
if (salt != null) {
|
|||
|
|
digest.update(salt);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
byte[] result = digest.digest(input);
|
|||
|
|
|
|||
|
|
for (int i = 1; i < iterations; i++) {
|
|||
|
|
digest.reset();
|
|||
|
|
result = digest.digest(result);
|
|||
|
|
}
|
|||
|
|
return result;
|
|||
|
|
} catch (GeneralSecurityException e) {
|
|||
|
|
throw Exceptions.unchecked(e);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* 生成随机的Byte[]作为salt.
|
|||
|
|
*
|
|||
|
|
* @param numBytes byte数组的大小
|
|||
|
|
*/
|
|||
|
|
public static byte[] generateSalt(int numBytes) {
|
|||
|
|
Validate.isTrue(numBytes > 0, "numBytes argument must be a positive integer (1 or larger)",
|
|||
|
|
numBytes);
|
|||
|
|
|
|||
|
|
byte[] bytes = new byte[numBytes];
|
|||
|
|
random.nextBytes(bytes);
|
|||
|
|
return bytes;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* 对文件进行md5散列.
|
|||
|
|
*/
|
|||
|
|
public static byte[] md5(InputStream input) throws IOException {
|
|||
|
|
return digest(input, MD5);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* 对文件进行sha1散列.
|
|||
|
|
*/
|
|||
|
|
public static byte[] sha1(InputStream input) throws IOException {
|
|||
|
|
return digest(input, SHA1);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private static byte[] digest(InputStream input, String algorithm) throws IOException {
|
|||
|
|
try {
|
|||
|
|
MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
|
|||
|
|
int bufferLength = 8 * 1024;
|
|||
|
|
byte[] buffer = new byte[bufferLength];
|
|||
|
|
int read = input.read(buffer, 0, bufferLength);
|
|||
|
|
|
|||
|
|
while (read > -1) {
|
|||
|
|
messageDigest.update(buffer, 0, read);
|
|||
|
|
read = input.read(buffer, 0, bufferLength);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return messageDigest.digest();
|
|||
|
|
} catch (GeneralSecurityException e) {
|
|||
|
|
throw Exceptions.unchecked(e);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
}
|