package com.seewo.libnfc.tools;

/* JADX INFO: loaded from: classes.dex */
public class HexTools {
    private static final String HEX = "0123456789ABCDEF";

    private HexTools() {
    }

    public static String toHex(String str) {
        return toHex(str.getBytes());
    }

    public static String fromHex(String str) {
        return new String(toByte(str));
    }

    public static byte[] toByte(String str) {
        int length = str.length() / 2;
        byte[] bArr = new byte[length];
        for (int i = 0; i < length; i++) {
            int i2 = i * 2;
            bArr[i] = Integer.valueOf(str.substring(i2, i2 + 2), 16).byteValue();
        }
        return bArr;
    }

    public static String toHex(byte[] bArr) {
        if (bArr == null) {
            return "";
        }
        StringBuilder sb = new StringBuilder(bArr.length * 2);
        for (byte b : bArr) {
            appendHex(sb, b);
        }
        return sb.toString();
    }

    public static String bytesToHexString(byte[] bArr) {
        StringBuilder sb = new StringBuilder("");
        if (bArr == null || bArr.length <= 0) {
            return null;
        }
        for (byte b : bArr) {
            String hexString = Integer.toHexString(b & 255);
            if (hexString.length() < 2) {
                sb.append(0);
            }
            sb.append(hexString);
        }
        return sb.toString();
    }

    private static void appendHex(StringBuilder sb, byte b) {
        sb.append(HEX.charAt((b >> 4) & 15)).append(HEX.charAt(b & 15));
    }
}