翰林优商.apk(点击下载) / MD5Util.java

package com.baidu.speech.utils;

import com.umeng.analytics.pro.cb;
import java.io.File;
import java.io.FileInputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import kotlin.UByte;

public class MD5Util {
    public static char[] hexDigits = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
    public static MessageDigest messagedigest;

    static {
        try {
            messagedigest = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
    }

    private static void appendHexPair(byte b, StringBuffer stringBuffer) {
        char[] cArr = hexDigits;
        char c = cArr[(b & 240) >> 4];
        char c2 = cArr[b & cb.m];
        stringBuffer.append(c);
        stringBuffer.append(c2);
    }

    private static String bufferToHex(byte[] bArr) {
        return bufferToHex(bArr, 0, bArr.length);
    }

    private static String bufferToHex(byte[] bArr, int i, int i2) {
        StringBuffer stringBuffer = new StringBuffer(i2 * 2);
        int i3 = i2 + i;
        while (i < i3) {
            appendHexPair(bArr[i], stringBuffer);
            i++;
        }
        return stringBuffer.toString();
    }

    public static String getFileMD5String(File file) {
        FileInputStream fileInputStream = new FileInputStream(file);
        byte[] bArr = new byte[1024];
        while (true) {
            int read = fileInputStream.read(bArr);
            if (read > 0) {
                messagedigest.update(bArr, 0, read);
            } else {
                fileInputStream.close();
                return bufferToHex(messagedigest.digest());
            }
        }
    }

    public static String toHexString(byte[] bArr, String str, boolean z) {
        StringBuilder sb = new StringBuilder();
        for (byte b : bArr) {
            String hexString = Integer.toHexString(b & UByte.MAX_VALUE);
            if (z) {
                hexString = hexString.toUpperCase();
            }
            if (hexString.length() == 1) {
                sb.append("0");
            }
            sb.append(hexString);
            sb.append(str);
        }
        return sb.toString();
    }

    public static String toMd5(byte[] bArr, boolean z) {
        try {
            MessageDigest instance = MessageDigest.getInstance("MD5");
            instance.reset();
            instance.update(bArr);
            return toHexString(instance.digest(), "", z);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
    }
}