Key防盗链

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

public class Main {

        public static void main(String[] args) {

		// data="$"+<Timestamp>+"$"+<LiveID>+"$"+<CheckLevel>，具体请参见“鉴权方式C”
                String data = "$20190428110000$live/stream01$3";

                // 随机生成的16位数字和字母组合
		byte[] ivBytes = "yCmE666N3YAq30SN".getBytes();

                //在直播控制台配置的Key值
		byte[] key = "GCTbw44s6MPLh4GqgDpnfuFHgy25Enly".getBytes();

                String msg = aesCbcEncrypt(data, ivBytes, key);
		try {
			System.out.println(URLEncoder.encode(msg, "UTF-8") + "." + bytesToHexString(ivBytes));
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
	}

        private static String aesCbcEncrypt(String data, byte[] ivBytes, byte[] key) {
		try {
			SecretKeySpec sk = new SecretKeySpec(key, "AES");
			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

                        if (ivBytes != null) {
				cipher.init(Cipher.ENCRYPT_MODE, sk, new IvParameterSpec(ivBytes));
			} else {
				cipher.init(Cipher.ENCRYPT_MODE, sk);
			}

                        return Base64.encode(cipher.doFinal(data.getBytes("UTF-8")));
		} catch (Exception e) {
			return null;
		}
	}

        public static String bytesToHexString(byte[] src) {
		StringBuilder stringBuilder = new StringBuilder("");
		if ((src == null) || (src.length <= 0)) {
			return null;
		}

                for (int i = 0; i < src.length; i++) {
			int v = src[i] & 0xFF;
			String hv = Integer.toHexString(v);
			if (hv.length() < 2) {
				stringBuilder.append(0);
			}
			stringBuilder.append(hv);
		}
		return stringBuilder.toString();
	}
}

public class Base64
{

    /** Base64编码表。*/
    private static char base64Code[] =
    {
        'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
        'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
        'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1',
        '2', '3', '4', '5', '6', '7', '8', '9', '+', '/',};

    /**
     * 构造方法私有化，防止实例化。
     */
    private Base64()
    {
        super();
    }

    /**
     * Base64编码。将字节数组中字节3个一组编码成4个可见字符。
     * @param bytes 需要被编码的字节数据。
     * @return 编码后的Base64字符串。
     */
    public static String encode(byte[] bytes)
    {
        int a = 0;

        // 按实际编码后长度开辟内存，加快速度
        StringBuffer buffer = new StringBuffer(((bytes.length - 1) / 3) << 2 + 4);

        // 进行编码
        for (int i = 0; i < bytes.length; i++)
        {
            a |= (bytes[i] << (16 - i % 3 * 8)) & (0xff << (16 - i % 3 * 8));
            if (i % 3 == 2 || i == bytes.length - 1)
            {
                buffer.append(Base64.base64Code[(a & 0xfc0000) >>> 18]);
                buffer.append(Base64.base64Code[(a & 0x3f000) >>> 12]);
                buffer.append(Base64.base64Code[(a & 0xfc0) >>> 6]);
                buffer.append(Base64.base64Code[a & 0x3f]);
                a = 0;
            }
        }

        // 对于长度非3的整数倍的字节数组，编码前先补0，编码后结尾处编码用=代替，
        // =的个数和短缺的长度一致，以此来标识出数据实际长度
        if (bytes.length % 3 > 0)
        {
            buffer.setCharAt(buffer.length() - 1, '=');
        }
        if (bytes.length % 3 == 1)
        {
            buffer.setCharAt(buffer.length() - 2, '=');
        }
        return buffer.toString();
    }

}