76 lines
2.3 KiB
Java
76 lines
2.3 KiB
Java
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package com.maibu.utils;
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import com.maibu.utils.uuid.IdUtils;
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import lombok.NoArgsConstructor;
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import org.apache.commons.lang3.Validate;
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import java.io.IOException;
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import java.io.InputStream;
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import java.security.GeneralSecurityException;
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import java.security.MessageDigest;
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import java.security.SecureRandom;
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@NoArgsConstructor
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public class DigestUtils {
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private static SecureRandom random = new SecureRandom();
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private static IdUtils idUtils = new IdUtils(0,0);
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public static String getId(){
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return String.valueOf(Math.abs(random.nextLong()));
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}
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public static String nextId(){
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return String.valueOf(idUtils.nextId());
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}
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public static byte[] genSalt(int numBytes) {
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Validate.isTrue(numBytes > 0, "numBytes argument must be a positive integer (1 or larger)", (long)numBytes);
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byte[] bytes = new byte[numBytes];
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random.nextBytes(bytes);
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return bytes;
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}
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public static byte[] digest(byte[] input, String algorithm, byte[] salt, int iterations) {
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try {
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MessageDigest digest = MessageDigest.getInstance(algorithm);
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if(salt != null) {
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digest.update(salt);
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}
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byte[] result = digest.digest(input);
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for(int i = 1; i < iterations; ++i) {
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digest.reset();
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result = digest.digest(result);
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}
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return result;
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} catch (GeneralSecurityException var7) {
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throw ExceptionUtils.unchecked(var7);
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}
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}
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public static byte[] digest(InputStream input, String algorithm) throws IOException {
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try {
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MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
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int bufferLength = 8192;
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byte[] buffer = new byte[bufferLength];
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for(int read = input.read(buffer, 0, bufferLength); read > -1; read = input.read(buffer, 0, bufferLength)) {
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messageDigest.update(buffer, 0, read);
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}
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return messageDigest.digest();
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} catch (GeneralSecurityException var6) {
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throw ExceptionUtils.unchecked(var6);
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}
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}
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public static void main(String[] args) {
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for (int i = 0; i < 10; i++) {
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System.out.println(nextId());
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}
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}
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}
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