java aes 找iv IvParameterSpec(new

Question

package com.ads.web.app.network;

import android.util.Base64;
import java.security.MessageDigest;
import java.security.spec.AlgorithmParameterSpec;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class AESCrypt {
    public static final String SEED_16_CHARACTER = "DaCheAPPAesKey";
    private final Cipher cipher;
    private static AESCrypt instance;
    private final SecretKeySpec key;
    private AlgorithmParameterSpec spec;

    static {
    }

    public AESCrypt() throws Exception {
        super();
        MessageDigest v0 = MessageDigest.getInstance("SHA-256");
        v0.update("DaCheAPPAesKey".getBytes("UTF-8"));
        byte[] v1 = new byte[32];
        System.arraycopy(v0.digest(), 0, v1, 0, v1.length);
        this.cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
        this.key = new SecretKeySpec(v1, "AES");
        this.spec = this.getIV();
    }

    public String decrypt(String arg5) throws Exception {
        this.cipher.init(2, this.key, this.spec);
        return new String(this.cipher.doFinal(Base64.decode(arg5, 0)), "UTF-8");
    }

    public String encrypt(String arg5) throws Exception {
        this.cipher.init(1, this.key, this.spec);
        return new String(Base64.encode(this.cipher.doFinal(arg5.getBytes("UTF-8")), 0), "UTF-8");
    }

    public AlgorithmParameterSpec getIV() {
        return new IvParameterSpec(new byte[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0});
    }
                                             {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
    public static AESCrypt getInstance() {
        try {
            if(AESCrypt.instance == null) {
                AESCrypt.instance = new AESCrypt();
            }

            return AESCrypt.instance;
        }
        catch(Exception ) {
            return null;
        }
    }
}

真么让iv输出出来呀

Answer 1

AESCrypt aes = new AESCrypt();

String str= aes.decrypt(参数);