package com.hdl.photovoltaic.utils;
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import com.hdl.sdk.link.common.utils.LogUtils;
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import java.io.UnsupportedEncodingException;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.InvalidKeyException;
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import java.security.Key;
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import java.security.NoSuchAlgorithmException;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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import javax.crypto.BadPaddingException;
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import javax.crypto.Cipher;
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import javax.crypto.IllegalBlockSizeException;
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import javax.crypto.NoSuchPaddingException;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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/**
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* Created by Tong on 2021/9/23.
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*/
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public class ByteUtils {
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public static byte[] toByteArray(List<Byte> list) {
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Byte[] temps = list.toArray(new Byte[0]);
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byte[] result = new byte[temps.length];
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for (int i = 0; i < result.length; i++) {
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result[i] = temps[i];
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}
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return result;
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}
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public static List<Byte> toByteList(byte[] bytes) {
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final List<Byte> list = new ArrayList<>();
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for (byte aByte : bytes) {
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list.add(aByte);
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}
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return list;
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}
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public static byte[] getRangeBytes(List<Byte> list, int start, int end) {
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Byte[] temps = Arrays.copyOfRange(list.toArray(new Byte[0]), start, end);
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byte[] result = new byte[temps.length];
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for (int i = 0; i < temps.length; i++) {
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result[i] = temps[i];
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}
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return result;
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}
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public static byte[] copyBytes(byte bytes[], int index, int length) {
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byte[] result = new byte[length];
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for (int i = 0; i < result.length; i++) {
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result[i] = bytes[index + i];
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}
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return result;
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}
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/**
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* 拼接byte
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*/
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public static byte[] concatBytes(byte[] bt1, byte[] bt2) {
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if (bt1 == null) {
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return bt2;
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}
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if (bt2 == null) {
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return bt1;
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}
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byte[] bt3 = new byte[bt1.length + bt2.length];
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System.arraycopy(bt1, 0, bt3, 0, bt1.length);
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System.arraycopy(bt2, 0, bt3, bt1.length, bt2.length);
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return bt3;
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}
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public boolean endWith(Byte[] src, byte[] target) {
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if (src.length < target.length) {
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return false;
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}
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for (int i = 0; i < target.length; i++) {
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if (target[target.length - i - 1] != src[src.length - i - 1]) {
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return false;
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}
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}
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return true;
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}
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public static int byteIndexOf(byte[] searched, byte[] find, int start) {
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boolean matched;
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int end = find.length - 1;
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int skip = 0;
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for (int index = start; index <= searched.length - find.length; ++index) {
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matched = true;
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if (find[0] != searched[index] || find[end] != searched[index + end]) continue;
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else skip++;
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if (end > 10)
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if (find[skip] != searched[index + skip] || find[end - skip] != searched[index + end - skip])
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continue;
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else skip++;
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for (int subIndex = skip; subIndex < find.length - skip; ++subIndex) {
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if (find[subIndex] != searched[index + subIndex]) {
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matched = false;
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break;
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}
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}
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if (matched) {
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return index;
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}
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}
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return -1;
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}
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public static int getByteIndexOf(byte[] sources, byte[] src) {
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return getByteIndexOf(sources, src, 0, sources.length);
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}
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//判断一个byte数值在另外一个byte数组中对应的游标值
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public static int getByteIndexOf(byte[] sources, byte[] src, int startIndex) {
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return getByteIndexOf(sources, src, startIndex, sources.length);
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}
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//判断一个byte数值在另外一个byte数组中对应的游标值，指定开始的游标和结束的游标位置
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public static int getByteIndexOf(byte[] sources, byte[] src, int startIndex, int endIndex) {
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if (sources == null || src == null || sources.length == 0 || src.length == 0) {
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return -1;
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}
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if (endIndex > sources.length) {
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endIndex = sources.length;
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}
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int i, j;
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for (i = startIndex; i < endIndex; i++) {
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if (sources[i] == src[0] && i + src.length < endIndex) {
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for (j = 1; j < src.length; j++) {
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if (sources[i + j] != src[j]) {
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break;
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}
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}
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if (j == src.length) {
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return i;
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}
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}
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}
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return -1;
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}
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/**
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* 字符串to Bytes
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*
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* @param str 字符串
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* @return
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*/
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public static byte[] stringToBytes(String str) {
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try {
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// 使用指定的字符集将此字符串编码为byte序列并存到一个byte数组中
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return str.getBytes("utf-8");
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} catch (UnsupportedEncodingException e) {
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e.printStackTrace();
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}
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return new byte[]{};
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}
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public static String byte2hex(byte[] bytes) {
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StringBuilder sb = new StringBuilder();
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String tmp = null;
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for (byte b : bytes) {
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//将每个字节与0xFF进行与运算，然后转化为10进制，然后借助于Integer再转化为16进制
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tmp = Integer.toHexString(0xFF & b);
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if (tmp.length() == 1) {
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tmp = "0" + tmp;
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}
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sb.append(tmp + " ");
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}
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return sb.toString();
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}
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public static int bytes2int(byte[] bytes) {
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return bytes[3] & 0xFF | //
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(bytes[2] & 0xFF) << 8 | //
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(bytes[1] & 0xFF) << 16 | //
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(bytes[0] & 0xFF) << 24; //
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}
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public static byte[] intToByteArray(int i) {
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byte[] result = new byte[4];
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result[0] = (byte) ((i >> 24) & 0xFF);
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result[1] = (byte) ((i >> 16) & 0xFF);
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result[2] = (byte) ((i >> 8) & 0xFF);
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result[3] = (byte) (i & 0xFF);
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return result;
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}
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public static int byteArrayToInt(byte[] b) {
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int i = (b[0] & 0xFF) * 256 * 256 * 256 + (b[1] & 0xFF) * 256 * 256 + (b[2] & 0xFF) * 256 + (b[3] & 0xFF);
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return i;
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}
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}
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